A tower fan with an automatically adjustable control panel angle

Abstract

The object of the present invention is to provide a tower fan with an automatically adjustable control panel angle, and the control panel of the tower fan can still maintain an upright posture when the fan body rotates, so as to facilitate user operation. The structure of the tower fan with an automatically adjustable control panel angle according to the present invention is as follows: The tower fan includes a fixed base provided with a column, and a fan body rotatably connected to the column through a pivot. A control panel bracket is fixedly provided on the fan body, and a control panel is installed on the control panel bracket. The key lies in that the control panel is movably installed on the control panel bracket by a rotating shaft parallel to the pivot, and an angle control mechanism is provided at the rotating shaft for making the control panel present a predetermined angle after the fan body stops. The tower fan of the present invention can automatically restore the control panel to the initial upright state after the angle of the fan body is adjusted, so as to facilitate user identification and use, and has good practicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and particularly relates to a tower fan. Background Art

[0002] The tower fan is a new type of fan that has gradually become popular in China in recent years. It abandons the traditional fan blades and relies on a motor to drive a wind wheel to generate air volume. It has the advantages of small size, gentle air supply, and safety. In order to make the use of the tower fan more flexible, the invention patent with the patent number 201020504943.5 discloses a tower fan with a rotatable fan body, which is characterized in that: the tower fan has a columnar fan body and a base for fixing the fan body. The fan body is rotatably connected to two protruding columns on the base through a pivot device in the middle. The fan body is provided with an air outlet grille on its column side surface, and a rotating air blade is arranged inside the fan body. The fan body is provided with control buttons on its column top surface. By using the tower fan with a rotatable fan body of the present invention, the rotation direction of the fan body can be adjusted according to the needs of the blowing area or the blowing height, so that the blowing area and the blowing height can be adjusted.

[0003] The control screen of the above tower fan is arranged at the top of the fan body. When the fan body rotates, the control screen will also change the angle synchronously with the fan body, and the characters, patterns, etc. on the control screen will be presented at a non-erect angle, making it difficult for users to observe and identify. Summary of the Invention

[0004] The object of the present invention is to propose a tower fan with an automatically adjustable control screen angle, and the control screen of the tower fan can still maintain an erect posture when the fan body rotates, so as to facilitate the use of users.

[0005] The structure of the tower fan with an automatically adjustable control screen angle of the present invention is as follows: the tower fan includes a fixed base provided with columns, and a fan body rotatably connected to the columns through a pivot. A control screen bracket is fixedly arranged on the fan body, and a control screen is installed on the control screen bracket. The key lies in that the control screen is movably installed on the control screen bracket by using a rotating shaft parallel to the pivot, and an angle control mechanism is arranged at the rotating shaft for making the control screen present a predetermined angle after the fan body stops.

[0006] In the above tower fan, the control screen is no longer directly fixed on the fan body, but is movably installed on the control screen bracket through a rotating shaft. In this way, the control screen can rotate relative to the control screen bracket and the fan body. After the fan body adjusts the angle (for example, from the vertical state to the horizontal state), the control screen can be automatically adjusted to a predetermined angle under the action of the angle control mechanism, so that the characters or patterns on it are easy to identify.

[0007] Further, the column is located at the back of the fan body, the control screen is located at the front of the fan body, and the air outlet grille of the fan body is arranged on the front or the front and sides of the fan body. In this way, no matter how the fan body rotates, the column will not block the air flow of the fan body and the control screen.

[0008] Further, the angle control mechanism includes a counterweight fixedly connected to the rotating shaft, and the center of gravity of the counterweight deviates from the axis of the rotating shaft. Under the action of its own gravity, the counterweight always tends to hang vertically below the rotating shaft. This tendency will exert a force on the rotating shaft. After the fan body rotates, this force makes the rotating shaft maintain or return to its original initial state (that is, the state where the counterweight is vertically below the rotating shaft). As long as it is designed such that the control screen is also exactly in the forward state when the rotating shaft is in the initial state, it can be ensured that during use, no matter how the fan body rotates, the control screen will still maintain or return to the forward state in a short time under the action of the counterweight.

[0009] Further, in order to prevent the control screen from rotating due to slight shaking of the fan body or other reasons, affecting normal use, a locking mechanism for relatively locking the rotating shaft and the control screen bracket is provided at the counterweight, and an unlocking mechanism for unlocking the locking mechanism when the fan body rotates, enabling relative movement between the rotating shaft and the control screen bracket. The above-mentioned locking mechanism can prevent the rotating shaft from rotating randomly when the fan body has slight shaking, ensuring the stability of the control screen; and when the unlocking mechanism detects that the fan body rotates by more than a certain angle, the unlocking mechanism will automatically unlock the above-mentioned locking mechanism, enabling relative movement between the rotating shaft and the control screen bracket. At this time, the control screen can automatically return to the initial state under the action of the counterweight.

[0010] Further, the locking mechanism and the unlocking mechanism include the following structures:

[0011] 1. The locking mechanism includes a positioning pin, a spring, and a positioning pin hole provided on one side of the counterweight. The positioning pin is movably installed in the positioning pin hole, and the positioning pin is connected to the counterweight through the spring. Under the elastic force of the spring, one end of the positioning pin abuts against the control screen bracket, and a convex block is provided on one side of the positioning pin; the unlocking mechanism is a starting pendulum that can rotate around the rotating shaft. The starting pendulum is provided with a working surface that cooperates with the convex block of the positioning pin. Pressing blocks are provided on both sides of the convex block of the working surface. When the starting pendulum rotates relative to the rotating shaft, the pressing blocks come into contact with the convex block of the positioning pin, causing the positioning pin to move against the elastic force of the spring, so that the positioning pin is separated from the control screen bracket.

[0012] The working principles of the above-mentioned locking mechanism and unlocking mechanism are as follows:

[0013] When the fan body and the control panel are both in a stable stationary state, the starting pendulum, under the action of its own gravity, is located directly below the rotating shaft. Similarly, the counterweight is also located directly below the rotating shaft under the action of its own gravity. At this time, the pressing blocks on the working surface of the starting pendulum are located on both sides of the convex block of the positioning pin and do not contact the convex block of the positioning pin. Therefore, the positioning pin does not receive the force from the working surface of the starting pendulum, but only receives the elastic force of the spring and the gravity of the positioning pin itself. The elastic force of the spring is greater than the gravity of the positioning pin, so that the positioning pin moves towards the control panel support until the top end of the positioning pin abuts against the control panel support. The force between the positioning pin and the control panel support plays a role in relatively fixing the rotating shaft and the control panel, and can prevent the control panel from rotating randomly.

[0014] When the fan body starts to rotate, due to the locking effect of the positioning pin, the rotating shaft will rotate with the rotation of the control panel support. However, the starting pendulum, under the action of its own gravity, still remains directly below the rotating shaft. When the fan body rotates beyond a predetermined angle, the convex block of the positioning pin will contact the pressing block on the side of the working surface of the starting pendulum in the rotation direction. The pressing block exerts a force away from the control panel support on the convex block, and this force drives the positioning pin to move away from the control panel support, so that the end of the positioning pin is separated from the control panel support. Without the locking effect of the positioning pin, the counterweight will drive the rotating shaft to rotate under its own gravity until the convex block of the positioning pin is separated from the pressing block again, and the positioning pin locks the rotating shaft and the control panel support together again.

[0015] As the fan body rotates, the above locking and unlocking processes will be repeated until the fan body stabilizes, and the counterweight stabilizes the control panel in the initial state.

[0016] Furthermore, limiting blocks for restricting the relative angle between the counterweight block and the starting pendulum are also provided on both sides of the convex block of the working surface. When the fan body rotates rapidly, the counterweight block will contact the limiting blocks. At this time, the positioning pin is in the unlocked state under the action of the pressing block, and the counterweight block will always maintain the relative angle with the starting pendulum, keeping the positioning pin in the unlocked state to accelerate the speed of the control panel returning to the initial state.

[0017] 2. The locking mechanism includes a positioning pin and a positioning pin through hole provided on one side of the counterweight. The positioning pin is movably installed in the positioning pin through hole; the locking mechanism further includes a cavity with an open bottom provided in the counterweight. A sphere is movably placed in the cavity. The bottom of the cavity is movably installed with a seesaw-shaped positioning pin support through a pin shaft. One end top surface of the positioning pin support abuts against the bottom of the positioning pin, and the other end top surface contacts the sphere. Under the action of the gravity of the sphere, the positioning pin support jacks up the positioning pin, so that the top end of the positioning pin abuts against the control panel support; the unlocking mechanism is a spring connecting the positioning pin and the counterweight, and the elastic force of the spring makes the positioning pin tend to move away from the control panel support.

[0018] The working principles of the above locking mechanism and unlocking mechanism are as follows:

[0019] When both the fan body and the control panel are in a stable static state, under the action of its own gravity, the sphere presses on one end of the positioning pin bracket, and by using the lever action of the positioning pin bracket, the other end of the positioning pin bracket is jacked up. This jacking force is applied to the positioning pin, causing the positioning pin to move upward against the downward elastic force of the spring until the top end of the positioning pin abuts against the control panel bracket. The acting force between the positioning pin and the control panel bracket plays a role in relatively fixing the rotating shaft and the control panel, which can prevent the control panel from rotating randomly.

[0020] When the fan body starts to rotate, due to the locking effect of the positioning pin, the rotating shaft will rotate along with the rotation of the control panel bracket, thereby driving the counterweight to rotate synchronously. After the counterweight rotates, the sphere in the counterweight cavity will roll under the action of its own gravity until part or all of the sphere is supported by the side wall of the cavity. At this time, the acting force exerted by the sphere on the positioning pin bracket will be less than the elastic force exerted by the spring on the positioning pin. Therefore, the positioning pin will move in the direction away from the control panel bracket under the action of the elastic force until the end of the positioning pin disengages from the control panel bracket. Without the locking effect of the positioning pin, the counterweight will drive the rotating shaft to rotate under the action of its own gravity until the sphere is fully supported on the positioning pin bracket again, and the positioning pin locks the rotating shaft and the control panel bracket together again.

[0021] As the fan body rotates, the above locking and unlocking processes will be repeated until the fan body stabilizes, and the counterweight stabilizes the control panel in the initial state.

[0022] Further, the side wall of the cavity is an inclined surface that gradually inclines towards the center of the cavity from top to bottom, so that the sphere can more easily roll to the side wall of the cavity, thereby increasing the unlocking speed.

[0023] In addition, the angle control mechanism also has the following two schemes controlled by a motor:

[0024] 1. The angle control mechanism includes a stepper motor that is relatively fixed in position with respect to the control panel bracket, an inclination sensor for detecting the inclination angle of the control panel, a positioning mechanism for marking the initial angle of the control panel, and a controller for controlling the operation of the stepper motor based on the information from the inclination sensor and the positioning mechanism; the stepper motor is connected to the rotating shaft through a transmission mechanism to drive the rotating shaft to rotate.

[0025] When the fan body is in the initial state and the control screen is stable, the angle between the control screen and the control screen bracket is the initial angle. The positioning mechanism sends the information of the control screen at the initial angle to the controller, and the controller controls the stepping motor not to work, so that the control screen and the fan body remain relatively fixed. When the fan body starts to rotate, since the stepping motor has not started working, the control screen will rotate synchronously with the fan body. After the tilt sensor detects a change in the angle of the control screen, it sends the angle information of the control screen to the controller. The controller controls the stepping motor to work according to the initial angle and the above angle information, so that the stepping motor drives the rotating shaft and the control screen on it to rotate in the direction opposite to the rotation direction of the fan body until the angle of the control screen returns to the initial angle. The positioning mechanism sends the information of the control screen at the initial angle to the controller again, and the controller stops the stepping motor at this time. In this way, the angle of the control screen can be controlled by relying on the stepping motor (maintaining the initial upright state).

[0026] 2. The angle control mechanism includes a synchronous motor fixed relative to the position of the control screen bracket, a tilt sensor for detecting the tilt angle of the control screen, a first microswitch located beside the rotating shaft and corresponding to the first state of the fan body and a second microswitch corresponding to the second state, and the fan body is perpendicular to each other in the first state and the second state; and a controller respectively connected to the tilt sensor, the synchronous motor, and the microswitch; the synchronous motor is connected to the rotating shaft through a transmission mechanism to drive the rotating shaft to rotate; a protruding contact piece is provided on the rotating shaft, and the contact piece contacts the corresponding microswitch when the rotating shaft rotates relative to the fan body to the first state or the second state; the controller controls the action of the synchronous motor according to the information of the tilt sensor and the microswitch.

[0027] When the fan body is in the first state and the control screen is stable, the contact piece on the rotating shaft abuts against the first microswitch corresponding to the first state, causing the microswitch to be in a closed state, while the second microswitch corresponding to the second state is in an open state. At the same time, the tilt sensor detects that the tilt angle of the control screen is the initial angle (for example, 0 degrees). At this time, the controller controls the synchronous motor to be in a non-operating state, keeping the control screen at the initial angle. When the fan body rotates from the first state to the second state, since the synchronous motor is not working, the control screen will rotate synchronously with the fan body. The controller detects through the tilt sensor that the tilt angle of the control screen is no longer the initial angle. At this time, the controller starts to control the synchronous motor to drive the rotating shaft to rotate. If the starting rotation direction of the rotating shaft is towards the first microswitch, the rotating shaft will immediately be resisted by the first microswitch, causing the synchronous motor to rotate in the reverse direction. Therefore, when the rotating shaft actually rotates, it always rotates towards the second microswitch; after the contact piece leaves the first microswitch, the first microswitch changes from the closed state to the open state; when the contact piece of the rotating shaft abuts against the second microswitch, the second microswitch changes from the open state to the closed state. At this time, the controller controls the synchronous motor to stop rotating; when the fan body continues to rotate, the controller will control the synchronous motor to continue rotating until the fan body stabilizes in the second state. The controller detects through the tilt sensor that the tilt angle of the control screen is the initial angle, and the controller controls the synchronous motor to be in a non-operating state, keeping the control screen at the initial angle. When the fan body rotates from the second state to the first state, the rotation control of the control screen is opposite to the above process, which will not be elaborated here. In this way, the angle of the control screen can be made controllable (maintained in the initial upright state) by relying on the synchronous motor. The above controller can use a single-chip microcomputer, which will not be elaborated here.

[0028] The tower fan of the present invention can automatically restore the control screen to the initial upright state after the fan body adjusts the angle, which is convenient for users to identify and use, and has good practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 、 2 is a schematic diagram of the overall structure of the tower fan in Embodiment 1 (the fan body is in the vertical and horizontal states respectively).

[0030] Figure 3 is a partial structural schematic diagram of the control screen of the tower fan in Embodiment 1.

[0031] Figure 4 is an exploded view of the control screen of the tower fan in Embodiment 1.

[0032] Figure 5 is a partial cross-sectional view of the control screen of the tower fan in Embodiment 1.

[0033] Figure 6 is a partial structural schematic diagram of the control screen of the tower fan in Embodiment 2.

[0034] Figure 7 It is a front structural schematic diagram of the starting pendulum in Embodiment 2.

[0035] Figure 8 It is an exploded view at the control screen of the tower fan in Embodiment 2.

[0036] Figure 9 It is a partial cross-sectional view at the control screen of the tower fan in Embodiment 2.

[0037] Figure 10 It is a partial structural schematic diagram at the control screen of the tower fan in Embodiment 3.

[0038] Figure 11 It is an exploded view at the control screen of the tower fan in Embodiment 3.

[0039] Figure 12 It is a partial cross-sectional view at the control screen of the tower fan in Embodiment 3.

[0040] Figure 13 It is a cross-sectional view at the counterweight in Embodiment 3.

[0041] Figure 14 、 15 They are partial structural schematic diagrams at the control screen of the tower fan in Embodiment 4 from two different angles.

[0042] Figure 16 It is an exploded view at the control screen of the tower fan in Embodiment 4.

[0043] Figure 17 It is a partial cross-sectional view at the control screen of the tower fan in Embodiment 4.

[0044] Figure 18 It is a partial structural schematic diagram at the control screen of the tower fan in Embodiment 5.

[0045] Reference numerals: 1. Control screen support; 2. Bearing; 3. Control screen; 4. Rotating shaft; 5. Swing rod; 6. Counterweight; 7. Positioning pin; 8. Spring; 9. Positioning pin hole; 10. Pipe body; 11. Sleeve; 12. Starting pendulum; 13. Working surface; 14. Protrusion; 15. Pressure block; 16. Limiting block; 17. Positioning pin through hole; 18. Cavity; 19. Sphere; 20. Positioning pin support; 21. Stepping motor; 22. Inclination sensor; 23. Metal marking piece; 24. Metal proximity switch; 25. Synchronous motor; 26. First microswitch; 27. Second microswitch; 28. Contact piece; 29. Gear transmission mechanism; 30. Fixed seat; 31. Column; 32. Fan body; 33. Air outlet grille. Detailed implementation manners

[0046] The following will, with reference to the accompanying drawings and through the description of the embodiments, further elaborate in detail on the specific implementation manners of the present invention, such as the shapes, structures of various components involved, the mutual positions and connection relationships between various parts, the functions of various parts, and the working principles, etc.

[0047] Embodiment 1:

[0048] This embodiment provides a tower fan with an automatically adjustable control screen angle. The control screen of this tower fan can maintain an upright posture when the fan body rotates, facilitating user operation.

[0049] As Figures 1 - 5 shown, the structure of the tower fan with an automatically adjustable control screen angle in this embodiment is as follows: This tower fan includes a fixed base 30 provided with a vertical column 31, and a fan body 32 rotatably connected to the column 31 through a pivot. The fan body 32 has a rotating impeller inside, and an air outlet grille 33 is provided on the front of the fan body 32. A control screen 3 for controlling the operation of the tower fan and displaying information such as temperature and mode is provided on the front top of the fan body 32. Of course, according to different needs, the control screen 3 can also be provided at the bottom or the central position of the fan body 32. The column 31 is located at the back of the fan body 32. The structures such as the above-mentioned rotating impeller and air outlet grille are the same as those of traditional tower fans and will not be elaborated here.

[0050] At the top inside the fan body, a control screen bracket 1 is integrally provided or fixed by means such as clamping or bolt fixing. The angle of the control screen bracket 1 is the angle of the fan body 32. A bearing 2 is provided at the central position of the control screen bracket 1. A protruding rotating shaft 4 parallel to the pivot is provided at the inner end of the control screen 3. The rotating shaft 4 passes through the bearing 2, so that the control screen 3 is rotatably mounted on the control screen bracket 1. An angle control mechanism is provided at the rotating shaft 4 for making the control screen 3 present a predetermined angle after the fan body 32 stops.

[0051] In this embodiment, the angle control mechanism is a counterweight 6 fixedly connected to the rotating shaft 4 through a swing rod 5. The presence of the swing rod 5 makes the center of gravity of the counterweight 6 deviate far from the axis of the rotating shaft 4. Under the action of its own gravity, the counterweight 6 always tends to hang vertically below the rotating shaft 4. This tendency will exert a force on the rotating shaft 4. After the fan body 32 rotates, this force makes the rotating shaft 4 maintain or return to its original initial state (i.e., the state where the counterweight 6 is vertically below the rotating shaft 4). Therefore, as long as it is designed such that the control screen 3 is also exactly in the forward state when the rotating shaft 4 is in the initial state, it can be ensured that during use, no matter how the fan body 32 rotates, the control screen 3 will still return to the forward state in a short time under the action of the counterweight 6, making the text or pattern on it easy to identify.

[0052] Embodiment 2:

[0053] In Embodiment 1, the angle of the control screen 3 is completely controlled by the counterweight 6. When the fan body 32 shakes slightly due to being touched by others or its own motor, etc., it will cause the control screen 3 to rotate slightly, affecting normal use. As Figures 4 - 7 shown, to solve this problem, in this embodiment, a locking mechanism for relatively locking the rotating shaft 4 and the control screen bracket 1 is provided at the counterweight 6, and an unlocking mechanism for unlocking the locking mechanism when the fan body 32 rotates, so that the rotating shaft 4 and the control screen bracket 1 can move relatively. The above-mentioned locking mechanism can prevent the rotating shaft 4 from rotating randomly when the fan body 32 shakes slightly, ensuring the stability of the control screen 3; and when the unlocking mechanism detects that the fan body 32 rotates by more than a certain angle, the unlocking mechanism will automatically unlock the above-mentioned locking mechanism, making the rotating shaft 4 and the control screen bracket 1 move relatively. At this time, the control screen 3 can automatically return to the initial state under the action of the counterweight 6.

[0054] Specifically, in this embodiment, the locking mechanism includes a positioning pin 7, a spring 8, and a positioning pin hole 9 provided on the side of the counterweight 6 facing the rotating shaft 4. The positioning pin 7 is movably installed in the positioning pin hole 9. The positioning pin 7 is connected to the counterweight 6 through the spring 8. A tube body 10 sleeved on the rotating shaft 4 is provided on one side of the control screen bracket 1; the spring 8 is in a compressed state. Under the elastic force of the spring 8, the top end of the positioning pin 7 abuts against the tube body 10 of the control screen bracket 1; the unlocking mechanism is a starting pendulum 12 that is movably sleeved on the tube body 10 through a sleeve 11 and can rotate around the rotating shaft 4. The starting pendulum 12 naturally rotates to directly below the rotating shaft 4 under its own gravity; of course, the length of the tube body 10 can also be reduced so that the sleeve 11 is directly sleeved on the rotating shaft 4; a convex block 14 is provided on one side of the positioning pin 7 facing the starting pendulum 12. The side of the starting pendulum 12 facing the positioning pin 7 is a working surface 13 that cooperates with the convex block 14 of the positioning pin 7. Pressure blocks 15 are provided on both sides of the convex block 14 on the working surface 13. When the starting pendulum 12 rotates relative to the rotating shaft 4, the pressure blocks 15 come into contact with the convex block 14 of the positioning pin 7, causing the positioning pin 7 to move against the elastic force of the spring 8, so that the positioning pin 7 is separated from the control screen bracket 1.

[0055] The working principles of the above-mentioned locking mechanism and unlocking mechanism are as follows:

[0056] When both the fan body 32 and the control panel 3 are in a stable static state, the starting pendulum 12 is located directly below the rotating shaft 4 under the action of its own gravity. Similarly, the counterweight 6 is also located directly below the rotating shaft 4 under the action of its own gravity. At this time, the pressing block 15 of the starting pendulum 12 is located on both sides of the convex block 14 of the positioning pin 7 and does not contact the convex block 14 of the positioning pin 7. Therefore, the positioning pin 7 does not receive the downward acting force from the working surface 13 of the starting pendulum 12, and only receives the elastic force of the spring 8 and the gravity of the positioning pin 7 itself. The elastic force of the spring 8 is greater than the gravity of the positioning pin 7, so that the positioning pin 7 moves in the direction of the control panel support 1 (i.e., upward) until the top end of the positioning pin 7 abuts against the pipe body 10 of the control panel support 1. The acting force between the positioning pin 7 and the control panel support 1 plays a role in relatively fixing the rotating shaft 4 and the control panel 3, which can prevent the control panel 3 from rotating randomly.

[0057] When the fan body 32 starts to rotate, due to the locking effect of the positioning pin 7, the rotating shaft 4 will rotate with the rotation of the control panel support 1. However, the starting pendulum 12 remains directly below the rotating shaft 4 under the action of its own gravity. When the fan body 32 rotates beyond a predetermined angle, the convex block 14 of the positioning pin 7 will contact the pressing block 15 on the side of the working surface 13 of the starting pendulum 12 in the rotation direction. The pressing block 15 exerts a force away from the control panel support 1 (i.e., downward) on the convex block 14. This acting force drives the positioning pin 7 to move in the direction away from the control panel support 1 (i.e., downward), so that the top end of the positioning pin 7 separates from the pipe body 10 of the control panel support 1. Without the locking effect of the positioning pin 7, the counterweight 6 will drive the rotating shaft 4 to rotate under its own gravity until the convex block 14 of the positioning pin 7 separates from the pressing block 15 again, and the positioning pin 7 locks the rotating shaft 4 and the control panel support 1 together again.

[0058] As the fan body 32 rotates, the above locking and unlocking processes will be repeated until the fan body 32 stabilizes, and the counterweight 6 stabilizes the control panel 3 in the initial state.

[0059] In this embodiment, limiting blocks 16 for restricting the relative angle between the counterweight 6 and the starting pendulum 12 are further provided on both sides of the convex block 14 of the working surface 13. Specifically, the limiting blocks 16 are located below and close to the corresponding pressing block 15 on the outer side. When the fan body 32 rotates rapidly, the counterweight 6 will contact the limiting block 16. At this time, the positioning pin 7 is in the unlocked state under the action of the pressing block 15. Under the limiting action of the limiting block 16, the counterweight 6 will always maintain the relative angle with the starting pendulum 12, so that the positioning pin 7 remains in the unlocked state to accelerate the speed of the control panel 3 returning to the initial state.

[0060] Embodiment 3:

[0061] In Embodiment 1, the angle of the control screen 3 is completely controlled by the counterweight 6. When the fan body 32 shakes slightly due to being touched by others or its own motor, etc., it will cause the control screen 3 to rotate slightly, affecting normal use. To solve this problem, in this embodiment, a locking mechanism for relatively locking the rotating shaft 4 and the control screen bracket 1 is provided at the counterweight 6, and an unlocking mechanism for unlocking the locking mechanism when the fan body 32 rotates to enable relative movement between the rotating shaft 4 and the control screen bracket 1. The above-mentioned locking mechanism can prevent the rotating shaft 4 from rotating randomly when the fan body 32 shakes slightly, ensuring the stability of the control screen 3; and when the unlocking mechanism detects that the fan body 32 rotates beyond a certain angle, the unlocking mechanism will automatically unlock the above-mentioned locking mechanism to enable relative movement between the rotating shaft 4 and the control screen bracket 1. At this time, the control screen 3 can automatically return to the initial state under the action of the counterweight 6.

[0062] Specifically, as Figures 8 - 11 shown, in this embodiment, a tube body 10 sleeved on the rotating shaft 4 is provided on one side of the control screen bracket 1; the locking mechanism includes a positioning pin 7 and a positioning pin through hole 17 facing the direction of the rotating shaft 4 provided on one side of the counterweight 6. The positioning pin 7 is movably installed in the positioning pin through hole 17, and the top and bottom ends of the positioning pin 7 are respectively exposed at the upper and lower ends of the positioning pin through hole 17; the locking mechanism further includes a cavity 18 with an open bottom provided in the counterweight 6. A steel ball 19 is movably placed in the cavity 18. The bottom of the cavity 18 is movably installed with a positioning pin bracket 20 of a seesaw structure through a pin shaft. One end top surface of the positioning pin bracket 20 abuts against the bottom of the positioning pin 7, and the other end top surface is in contact with the bottom of the ball 19. The unlocking mechanism is a spring 8 connecting the positioning pin 7 and the counterweight 6. The spring 8 is in a compressed state, and the elastic force of the spring 8 causes the positioning pin 7 to tend to move away from the control screen bracket 1 (i.e., downward), so that the top end of the positioning pin 7 is separated from the tube body 10 of the control screen bracket 1.

[0063] The working principles of the above-mentioned locking mechanism and unlocking mechanism are as follows:

[0064] When the fan body 32 and the control screen 3 are both in a stable stationary state, the ball 19, under the action of its own gravity, presses on one end of the positioning pin bracket 20, and uses the lever action of the positioning pin bracket 20 to jack up the other end of the positioning pin bracket 20. This jacking force is applied to the positioning pin 7, causing the positioning pin 7 to move upward against the downward elastic force of the spring 8 until the top end of the positioning pin 7 abuts against the tube body 10 of the control screen bracket 1. The acting force between the positioning pin 7 and the control screen bracket 1 plays a role in relatively fixing the rotating shaft 4 and the control screen 3, and can prevent the control screen 3 from rotating randomly.

[0065] When the fan body 32 starts to rotate, due to the locking effect of the positioning pin 7, the rotating shaft 4 will rotate along with the rotation of the control screen bracket 1, thereby driving the counterweight 6 to rotate synchronously. After the counterweight 6 rotates, the sphere 19 in the cavity 18 of the counterweight 6 will roll under its own gravity until part or all of the sphere 19 is supported by the side wall of the cavity 18 (as Figure 11 shown). At this time, the force exerted by the sphere 19 on the positioning pin bracket 20 will be less than the elastic force exerted by the spring 8 on the positioning pin 7. Therefore, the positioning pin 7 will move away from the control screen bracket 1 under the action of the elastic force until the end of the positioning pin 7 is disengaged from the control screen bracket 1. Without the locking effect of the positioning pin 7, the counterweight 6 will drive the rotating shaft 4 to rotate under its own gravity until the sphere 19 is completely supported on the positioning pin bracket 20 again, and the positioning pin 7 locks the rotating shaft 4 and the control screen bracket 1 together again.

[0066] As the fan body 32 rotates, the above-mentioned locking and unlocking processes will be repeated until the fan body 32 stabilizes, and the counterweight 6 stabilizes the control screen 3 in the initial state.

[0067] In this embodiment, the side wall of the cavity 18 is an inclined surface that gradually inclines towards the center of the cavity 18 from top to bottom, so that the sphere 19 can more easily roll to the side wall of the cavity 18, thereby increasing the unlocking speed.

[0068] Embodiment 4:

[0069] As Figures 12 - 15 shown, different from Embodiments 1, 2, and 3, the angle control mechanism in this embodiment includes a stepper motor 21 fixed to one side of the control screen bracket 1, an inclination sensor 22 fixed to one side of the control screen 3 for detecting the inclination angle of the control screen 3, a positioning mechanism for marking the initial angle of the control screen 3, and a controller (not shown in the figure) for controlling the operation of the stepper motor 21 according to the information of the inclination sensor 22 and the positioning mechanism; the stepper motor 21 is connected to the rotating shaft 4 through a gear transmission mechanism 29 to drive the rotating shaft 4 to rotate; the above-mentioned positioning mechanism is composed of a metal marking piece 23 fixed on the gear of the rotating shaft 4 and a metal proximity switch 24 fixed on the control screen bracket 1.

[0070] When the fan body 32 is in the initial state and the control screen 3 is stable, the angle between the control screen 3 and the control screen bracket 1 is the initial angle. At this time, the metal proximity switch 24 in the positioning mechanism will be triggered because the distance from the metal marking piece 23 is less than the predetermined distance, thereby sending the information that the control screen 3 is in the initial angle to the controller, and the controller controls the stepper motor 21 not to work, so that the control screen 3 and the fan body 32 remain relatively fixed;

[0071] When the fan body 32 starts to rotate, since the stepper motor 21 has not started working, the control screen 3 will rotate synchronously with the fan body 32. After the inclination sensor 22 detects a change in the angle of the control screen 3, it sends the angle information of the control screen 3 to the controller. The controller controls the stepper motor 21 to work based on the initial angle and the above angle information, so that the stepper motor 21 drives the rotating shaft 4 and the control screen 3 thereon to rotate in the direction opposite to the rotation direction of the fan body 32 until the angle of the control screen 3 returns to the initial angle, and the metal proximity switch 24 is triggered again. At this time, the controller stops the stepper motor 21. In this way, the angle of the control screen 3 can be controlled by relying on the stepper motor 21 and maintained in an upright state.

[0072] Embodiment 5:

[0073] As Figure 16 shown, different from Embodiment 4, the angle control mechanism of this embodiment includes a synchronous motor 25 that is relatively fixed in position with the control screen bracket 1, an inclination sensor 22 for detecting the inclination angle of the control screen 3, a first microswitch 26 corresponding to the first state of the fan body 32 and a second microswitch 27 corresponding to the second state, and a controller (not shown in the figure, specifically, a single-chip microcomputer can be used) that is respectively connected to the inclination sensor 22, the synchronous motor 25, the first microswitch 26, and the second microswitch 27; the first microswitch 26 and the second microswitch 27 are both fixed on the control screen bracket 1 and are located beside the rotating shaft 4. The fan body 32 is perpendicular to each other in the first state and the second state (in this embodiment, the first state is that the fan body 32 is in a vertical state, and the second state is that the fan body 32 is in a horizontal state). The synchronous motor 25 is connected to the rotating shaft 4 through a gear transmission mechanism 29 to drive the rotating shaft 4 to rotate; a protruding contact piece 28 is provided on the rotating shaft 4. When the rotating shaft 4 rotates relative to the fan body 32 to the first state or the second state, the contact piece 28 contacts the corresponding microswitch; the controller controls the action of the synchronous motor 25 according to the information of the inclination sensor 22 and the microswitch.

[0074] When the fan body 32 is in the first state and the control screen 3 is stable, the contact piece 28 on the rotating shaft 4 abuts against the first microswitch 26 corresponding to the first state, causing the microswitch to be in a closed state, while the other second microswitch 27 corresponding to the second state is in an open state. At the same time, the tilt sensor 22 detects that the tilt angle of the control screen 3 is the initial angle (for example, 0 degrees). At this time, the controller controls the synchronous motor 25 to be in a non-operating state, keeping the control screen 3 at the initial angle. When the fan body 32 rotates from the first state to the second state, since the synchronous motor 25 is not operating, the control screen 3 will rotate synchronously with the fan body 32. The controller detects through the tilt sensor 22 that the tilt angle of the control screen 3 is no longer the initial angle. At this time, the controller starts to control the synchronous motor 25 to drive the rotating shaft 4 to rotate. If the starting rotation direction of the rotating shaft 4 is towards the first microswitch 26, the rotating shaft 4 will immediately be resisted by the first microswitch 26, causing the synchronous motor 25 to rotate in the reverse direction. Therefore, when the rotating shaft 4 actually rotates, it always rotates towards the second microswitch 27; after the contact piece 28 leaves the first microswitch 26, the first microswitch 26 changes from the closed state to the open state; when the contact piece 28 of the rotating shaft 4 abuts against the second microswitch 27, the second microswitch 27 changes from the open state to the closed state. At this time, the controller controls the synchronous motor 25 to stop rotating; when the fan body 32 continues to rotate, the controller will control the synchronous motor 25 to continue rotating until the fan body 32 stabilizes in the second state. The controller detects through the tilt sensor 22 that the tilt angle of the control screen 3 is the initial angle, and the controller controls the synchronous motor 25 to be in a non-operating state, keeping the control screen 3 at the initial angle.

[0075] When the fan body 32 rotates from the second state to the first state, the rotation control of the control screen 3 is opposite to the above process and will not be elaborated here. In this way, the angle of the control screen 3 can be made controllable (maintained in the initial upright state) relying on the synchronous motor 25.

[0076] The present invention has been described exemplarily in combination with the accompanying drawings. Obviously, the specific design of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A tower fan with an automatically adjustable control panel angle, comprising a fixed base provided with a column, and a fan body rotatably connected to the column through a pivot. The fan body has a rotating impeller inside, and a control panel bracket is fixedly provided on the fan body, and a control panel is installed on the control panel bracket; characterized in that, The control panel is movably mounted on the control panel bracket by means of a rotating shaft parallel to the pivot shaft, and an angle control mechanism is provided at the rotating shaft for making the control panel assume a predetermined angle after the fan body stops; The angle control mechanism includes a counterweight fixedly connected to the rotating shaft, and the center of gravity of the counterweight deviates from the axis of the rotating shaft; A locking mechanism for relatively locking the rotating shaft and the control panel bracket is provided at the counterweight, and an unlocking mechanism for unlocking the locking mechanism when the fan body rotates to enable relative movement between the rotating shaft and the control panel bracket; The locking mechanism includes a positioning pin, a spring and a positioning pin hole provided on one side of the counterweight. The positioning pin is movably installed in the positioning pin hole. The positioning pin is connected to the counterweight by a spring. Under the elastic force of the spring, one end of the positioning pin abuts against the control panel bracket, and a convex block is provided on one side of the positioning pin; the unlocking mechanism is a starting pendulum that can rotate around the rotating shaft. The starting pendulum is provided with a working surface that cooperates with the convex block of the positioning pin. Pressing blocks are provided on both sides of the convex block on the working surface. When the starting pendulum rotates relative to the rotating shaft, the pressing blocks come into contact with the convex block of the positioning pin, causing the positioning pin to move against the elastic force of the spring, so that the positioning pin is separated from the contact with the control panel bracket; alternatively, the locking mechanism includes a positioning pin and a positioning pin through hole provided on one side of the counterweight. The positioning pin is movably installed in the positioning pin through hole; the locking mechanism further includes a cavity with an open bottom provided in the counterweight. A sphere is movably placed in the cavity. One end of a seesaw-shaped positioning pin bracket is movably installed at the bottom of the cavity through a pin shaft. The top surface of one end of the positioning pin bracket abuts against the bottom of the positioning pin, and the top surface of the other end is in contact with the sphere. Under the gravity of the sphere, the positioning pin bracket jacks up the positioning pin so that the top end of the positioning pin abuts against the control panel bracket; the unlocking mechanism is a spring connecting the positioning pin and the counterweight, and the elastic force of the spring causes the positioning pin to tend to move away from the control panel bracket.

2. The tower fan with an automatically adjustable control panel angle according to claim 1, wherein The column is located at the back of the fan body, the control panel is located at the front of the fan body, and the air outlet grille of the fan body is provided on the front or the front and sides of the fan body.

3. The tower fan for automatically adjusting the angle of the control screen according to claim 1, characterized in that, Limiting blocks for restricting the relative angle between the counterweight and the starting pendulum are further provided on both sides of the convex block on the working surface.

4. The tower fan for automatically adjusting the angle of a control panel according to claim 1, characterized in that The side wall of the cavity is an inclined surface that gradually inclines towards the central direction of the cavity from top to bottom.

5. The tower fan for automatically adjusting the angle of the control panel according to claim 1 or 2, characterized in that, The angle control mechanism includes a stepper motor with a relatively fixed position with respect to the control panel bracket, an inclination sensor for detecting the inclination angle of the control panel, a positioning mechanism for marking the initial angle of the control panel, and a controller for controlling the operation of the stepper motor according to the information of the inclination sensor and the positioning mechanism; the stepper motor is connected to the rotating shaft through a transmission mechanism to drive the rotating shaft to rotate.

6. The tower fan for automatically adjusting the angle of the control panel according to claim 1 or 2, characterized in that, The angle control mechanism includes a synchronous motor that is relatively fixed in position with respect to the control panel bracket, an inclination sensor for detecting the inclination angle of the control panel, a first microswitch located beside the rotating shaft and corresponding to the first state of the fan body, and a second microswitch corresponding to the second state, where the fan body is perpendicular to each other in the first state and the second state; and a controller respectively connected to the inclination sensor, the synchronous motor, and the microswitches; the synchronous motor is connected to the rotating shaft through a transmission mechanism to drive the rotating shaft to rotate; a protruding contact piece is provided on the rotating shaft, and the contact piece contacts the corresponding microswitch when the rotating shaft rotates relative to the fan body to the first state or the second state; the controller controls the operation of the synchronous motor according to the information of the inclination sensor and the microswitches.

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