Universal type automatic rocking fan device with stepless adjustable rocking speed and amplitude

Abstract

The invention relates to an automatic fan shaking device. A pulse generator and a Hall sensor control motor are used for achieving automatic fan shaking. Comprising a power execution system, a shaking stroke limiting system and a rack. According to the power execution system, a specially-designed coupler is used for rigidly connecting a motor shaft and a fan handle, a precision potentiometer is used for adjusting output of a pulse generator, and a driving plate adjusts the rotating speed of a motor according to pulse frequency. According to the shaking stroke limiting system, a Hall sensor is used for setting a motion stop point, an output signal is processed by a voltage comparator, an AND gate chip and a JK trigger to form a motion direction signal, and a driving plate sets the rotating direction of a motor according to the motion direction signal; the machine frame is formed by fixing plates through bolts, and an adapter or a base can be additionally fixed. According to the invention, motor direct drive is adopted, so that noise and loss of mechanical transmission are avoided; the system is driven only through a logic circuit, does not need microcomputer control, is simple, reliable and universal, is convenient in parameter adjustment, and is easy to popularize and use.

Description

Technical Field

[0001] The present invention relates to an automatic fan shaking device, specifically, a general automatic fan shaking device with steplessly adjustable shaking speed and amplitude, which is compatible with a variety of ordinary fans. Background Art

[0002] At present, the cooling devices available for purchase on the market are mainly air conditioners and electric fans. These two devices are technically mature, but the generated wind is a constant direct wind. Although the wind force and the wind direction can be adjusted, there are still a considerable number of elderly people, children, patients and other weak people who will experience discomfort symptoms when using them, or will get sick due to catching cold.

[0003] As a wind-making and cooling method that has the earliest appearance time and the generated wind is closest to natural wind, fanning a fan is still widely respected so far. However, long-term manual fanning is both prone to fatigue and affects the user's ability to perform other tasks simultaneously. At present, various devices for automatically shaking the fan surface have been designed successively according to mechanical principles such as the "crank-rocker" type four-bar mechanism, driving the swing pair. However, they all have disadvantages such as limited swing range, difficult swing adjustment, and many transmission components, which limit the practical effect.

[0004] To solve the above problems, it has become an urgent problem to design an electric fan shaking device with a compact structure, strong versatility and easy adjustment. Summary of the Invention

[0005] The purpose of the present invention is to provide a general automatic fan shaking device with steplessly adjustable shaking speed and amplitude to solve the above technical problems.

[0006] To solve the above problems, the technical solution adopted by the present invention is:

[0007] A general automatic fan shaking device with steplessly adjustable shaking speed and amplitude, characterized in that it includes a power execution system, a shaking stroke limit system and a frame.

[0008] The power execution system includes a pulse generator, a motor 3 and its drive board 7, and a fan holder 12. Further, the pulse generator uses an NE555 timer chip and a fixed-value capacitor, and uses a 103 precision potentiometer 5 to adjust the pulse generation frequency and multiplex it as the speed adjustment knob of the electric fan shaking device, outputting pulses of different frequencies as speed signals; the motor drive board 7 receives the speed signal and the movement direction signal (output from the Q end of the JK flip-flop U1 in the shaking stroke limit system), and drives the motor 3 according to the corresponding value; one end of the non-standard coupling 12 is rigidly connected to the motor shaft, and the other end is left empty for fixing the fan handle.

[0009] The swing stroke limit system includes a Hall sensor 10, a voltage comparator, a 74LS09 AND gate chip U2, a 74LS76 JK flip-flop U1, a "one"-shaped damping hinge 11, and a fan position synchronization rod 13. Further, one end of two "one"-shaped damping hinges 11 is coaxially fixed on the right side plate 9, and the other ends are respectively fixed with the Hall sensor 10. The Hall chips U3 and U4 on the two Hall sensors 10 are adjusted to the same horizontal plane through gaskets to form a swing stop point. The free end of the rotating hinge 11 can correspondingly change the stop point position; the fan position synchronization rod 13 is rigidly connected to the non-standard coupling 12 and a magnet is fixed at a corresponding position to excite the voltage signal of the Hall sensor 10 at the stop point; the two Hall sensors 10 receive the magnetic field generated by the magnet on the fan position synchronization rod 13 to form a sine signal. After being converted into a pulse square wave by the voltage comparator, pull-up resistors are used to lead out high and low level signals for output; the 74LS09 AND gate U2 chip receives two groups of high and low level signals and combines them for output as a commutation signal; the J and K terminals of the 74LS76 JK flip-flop U1 (triggered by the falling edge of the CLK) are set to high level. After the CLK terminal receives the commutation signal, the Q terminal is flipped for output to realize the change of the motion direction signal.

[0010] The frame includes a left side plate 2, a middle plate 1, and a right side plate 9, which are fixed by bolts and sleeves to form the frame. Further, the left side plate 2 is used to fix the power switch 6, the power supply switching switch 4, a 103 precision potentiometer 5 reused as a speed control knob, a DC12V power supply interface, and a battery compartment 8. The two sides of the middle plate 1 are respectively used to fix the motor 3 and its drive board 7, and the logic processing circuit PCB integrated board. The right side plate 9 is used to fix two coaxially placed "one"-shaped damping hinges 11. The three pins of the power supply switching switch 4 are respectively connected to the DC 12V power supply interface, the 12V boost voltage stabilizer board of the 18650 battery compartment 8, and the main circuit to realize the switching between external power supply and battery power supply. Particularly, to maximize the swing range, the front bolts connecting the middle plate 1 and the right side plate 9 should be placed in the middle of the bottom edge.

[0011] As one of the preferred solutions, the frame is directly used as a base.

[0012] As the second preferred solution, the bottom bolts of the frame use segmented sleeves to additionally fix an adapter, and the adapter is connected to a table clamp to fix the present invention at the edge of a plate desktop.

[0013] As the third preferred solution, the bottom bolts of the frame use segmented sleeves to additionally fix an adapter, and the adapter is connected to a vertical base to form a "floor fan" type placement method. Beneficial effects

[0014] Compared with the prior art, the present invention uses sensor detection and logic circuit signal processing. By moving the position of the Hall sensor, stepless adjustment of the stop position of the fan swing is achieved; by precisely controlling the pulse generator with a potentiometer, wide-range adjustment of the fan swing speed is realized; a right-angle non-standard coupling is used to directly connect the motor and the fan, avoiding additional load and noise of the transmission system, and having simplicity, reliability, and universality, being easy to use in practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the automatic fan shaking device described in the present invention;

[0016] Figure 2 Exploded structure schematic diagram of the automatic fan shaking device described in the present invention;

[0017] Figure 3 Schematic diagram of an application example of the table clamp of the automatic fan shaking device described in the present invention;

[0018] Figure 4 Schematic diagram of an application example of the floor base of the automatic fan shaking device described in the present invention;

[0019] Figure 5 Schematic diagram of the principle of the motion direction signal processing circuit described in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present invention will be further described below in conjunction with the drawings and specific embodiments. Refer to Figure 1 , in the embodiment, the left side plate 2, the middle plate 1, and the right side plate 9 are fixed to each other by bolts and sleeves to form a frame. In particular, to maximize the swing range, the front bolts connecting the middle plate and the right side plate should be placed in the middle of the bottom edge.

[0022] The left side plate 2 is fixed with a power switch 6, a power supply switching switch 4, a DC 12V power supply interface, a battery compartment 8, and a PCB board integrated with an NE555 timer chip and a 103 precision potentiometer 5. Among them, the power switch 6, the power supply switching switch 4, and the 103 precision potentiometer 5 are placed outside the frame through holes on the left side plate, and the DC 12V power supply interface is placed inside the frame. When using the present invention, turn the knob of the 103 precision potentiometer 5 to adjust the fan swing speed.

[0023] The middle plate 1 is provided with a wire threading hole, and a 42-step motor 3 with a height of 23.5 mm, an A4988 step motor driver 7, a PCB board integrating a 74LS09 AND gate U2 chip and a 74LS76 JK flip-flop U1 chip are fixed thereon. Among them, the 42-step motor with a height of 23.5 mm and the A4988 step motor driver are fixed on the left side of the middle plate, and the PCB board integrating the 74LS09 AND gate U2 chip and the 74LS76 JK flip-flop chip U1 is fixed on the right side of the middle plate. The motor shaft of the 42-step motor 3 is rigidly connected to the small end of the non-standard coupling 12 by a set screw, and the large end of the non-standard coupling 12 is inserted into the fan handle and clamped and fixed by a stud. A fan position synchronization rod 13 is fixed at the corner of the non-standard coupling 12, and magnets are placed on the fan position synchronization rod 13 corresponding to the positions of the Hall sensors 10.

[0024] Two "one"-shaped damping hinges 11 are fixed on the right side plate 9. The rotating shafts of the two "one"-shaped damping hinges 11 are coaxial with the motor shaft of the 42-step motor. The PCB board 10 integrating the 3144E Hall sensor chips U3, U4 and the LM393 voltage comparator chip is fixed at the free end of the "one"-shaped damping hinge 11, and the 3144E Hall sensor chips U3, U4 are adjusted to the same vertical plane through gaskets, serving as the upper and lower stop points for the swing of the fan. Moving the free end of the "one"-shaped damping hinge 11 drives the Hall sensor 10 to move to the required position, that is, the swing amplitude of the fan is adjusted.

[0025] The above is only the implementation mode of the present invention, and it does not limit the patent scope of the present invention accordingly. All equivalent structures made by using the content of the specification and drawings of the present invention, directly or indirectly applied in other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A universal automatic fan device with stepless adjustable swing speed and swing amplitude, characterized in that: A universal automatic fan-shaking device with stepless adjustable shaking speed and amplitude, characterized in that it includes a power execution system, a shaking stroke limit system and a frame. The power execution system includes a NE555 pulse generator whose output is adjusted by a precision potentiometer, a motor and its drive board, and a fan clamp; the shaking stroke limit system includes a Hall sensor, a voltage comparator, an AND gate chip, a JK trigger, a "I"-shaped damping hinge, a fan position synchronization rod, and a magnet; the frame includes a left side plate, a middle plate, a right side plate, fixing bolts and circuit accessories.

2. The power execution system according to claim 1, characterized in that: Directly use the NE555 timer chip to send pulses to the STEP end of each general model of motor driver, and use the potentiometer to adjust the pulse sending frequency to achieve motor speed control; the non-standard coupling is 90° as a whole, one end is rigidly connected to the motor shaft, and the other end is partially axially disconnected and fastened by bolts to achieve effective clamping of different fan handles.

3. The swing stroke limiting system according to claim 1, characterized in that: Two Hall sensors are arranged on the same vertical plane circumference using damping hinges, and serve as upper and lower dead point sensors to receive the magnetic field generated by the magnet on the fan synchronization rod; the Hall sensor outputs a sinusoidal signal generated by the moving magnet's magnetic field, which is converted into a pulse square wave by a voltage comparator and then outputs high and low level signals; the AND gate chip receives two groups of high and low level signals, combines them and outputs them as a commutation signal, and outputs a low level when any group of inputs is at a low level; the J and K terminals of the JK trigger (CLK falling edge trigger) are set to a high level, and when the CLK terminal receives the commutation signal and jumps from a high level to a low level, the Q terminal output is flipped to change the movement direction signal.

4. The frame according to claim 1, characterized in that: The left side plate, the middle plate and the right side plate are fixed in parallel with bolts, and the empty bolt rod parts between the plates can be used to install various adapters and bases to achieve effective fixation in different usage scenarios.

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