CN215805357U - Tower fan capable of automatically adjusting angle of control screen - Google Patents

Abstract

The utility model aims to provide a tower fan capable of automatically adjusting the angle of a control screen, wherein the control screen of the tower fan can still keep a vertical posture when a fan body rotates, so that the tower fan is convenient for a user to use. The tower fan structure capable of automatically adjusting the angle of the control screen is as follows: the tower fan comprises a fixed seat provided with a stand column and a fan body rotatably connected to the stand column through a pivot, wherein a control screen support is fixedly arranged on the fan body, and a control screen is arranged on the control screen support; the key point is that the control screen is movably arranged on the control screen bracket by utilizing a rotating shaft parallel to the pivot, and an angle control mechanism used for enabling the control screen to form a preset angle after the fan body is static is arranged at the rotating shaft. The tower fan can automatically restore the control screen to the initial upright state after the angle of the fan body is adjusted, so that the tower fan is convenient for users to identify and use, and has good practicability.

Description

Tower fan capable of automatically adjusting angle of control screen

Technical Field

The utility model belongs to the technical field of household appliances, and particularly relates to a tower fan.

Background

The tower fan is a novel fan which gradually becomes popular in China in recent years, traditional fan blades are abandoned, the wind wheel is driven by the motor to generate air volume, and the novel tower fan has the advantages of small volume, soft air supply, safety and the like. In order to make the use of the tower fan more flexible, utility model patent No. 201020504943.5 discloses a rotatable tower fan of fan body, its characterized in that: the tower fan is provided with a columnar fan body and a base for fixing the fan body, the fan body is rotatably connected to two upright posts protruding from the base through a pivot device at the middle part of the fan body, an air outlet grid is arranged on the side surface of the post of the fan body, rotating fan blades are arranged in the fan body, and control keys are arranged on the top surfaces of the posts of the fan body.

The control screen of the tower fan is arranged at the top end of the fan body, when the fan body rotates, the angle of the control screen can be synchronously changed along with the fan body, characters, patterns and the like on the control screen can be displayed at a non-upright angle, and a user can difficultly observe and recognize the control screen.

Disclosure of Invention

The utility model aims to provide a tower fan capable of automatically adjusting the angle of a control screen, wherein the control screen of the tower fan can still keep a vertical posture when a fan body rotates, so that the tower fan is convenient for a user to use.

The tower fan structure capable of automatically adjusting the angle of the control screen is as follows: the tower fan comprises a fixed seat provided with a stand column and a fan body rotatably connected to the stand column through a pivot, wherein a control screen support is fixedly arranged on the fan body, and a control screen is arranged on the control screen support; the key point is that the control screen is movably arranged on the control screen bracket by utilizing a rotating shaft parallel to the pivot, and an angle control mechanism used for enabling the control screen to form a preset angle after the fan body is static is arranged at the rotating shaft.

In the tower fan, the control screen is not directly fixed on the fan body, but is movably mounted on the control screen support through the rotating shaft, so that the control screen can rotate relative to the control screen support and the fan body, and after the angle of the fan body is adjusted (for example, the angle is adjusted from a vertical state to a horizontal state), the control screen can be automatically adjusted to a preset angle under the action of the angle control mechanism, so that characters, patterns and the like on the control screen are convenient to identify.

Furthermore, the upright posts are positioned on the back surface of the fan body, the control screen is positioned on the front surface of the fan body, and the air outlet grids of the fan body are arranged on the front surface or the front surface and the side surface of the fan body, so that the upright posts cannot block the air flow of the fan body and the control screen no matter how the fan body rotates.

Further, the angle control mechanism comprises a counterweight fixedly connected to the rotating shaft, and the center of gravity of the counterweight deviates from the axis of the rotating shaft. The counterweight always tends to be suspended under the rotating shaft under the action of self gravity, the trend can apply an acting force to the rotating shaft, the acting force can keep or restore the rotating shaft to the original initial state (namely the state that the counterweight is positioned under the rotating shaft) after the fan body rotates, and as long as the control screen is just in the forward state when the rotating shaft is in the initial state during design, the control screen can still keep or restore to the forward state under the action of the counterweight no matter how the fan body rotates during use.

Further, in order to avoid the influence on normal use caused by the rotation of the control screen due to slight shaking of the fan body and the like, the counterweight is provided with a locking mechanism for locking the rotating shaft and the control screen support relatively, and an unlocking mechanism for unlocking the locking mechanism when the fan body rotates and enabling the rotating shaft and the control screen support to move relatively. The locking mechanism can ensure that the rotating shaft cannot rotate randomly when the fan body slightly shakes, so that the stability of the control screen is ensured; and after the unlocking mechanism detects that the fan body rotates beyond a certain angle, the unlocking mechanism can automatically unlock the locking mechanism, so that the rotating shaft and the control screen support move relatively, and the control screen can automatically recover to an initial state under the action of the balance weight.

Further, the locking mechanism and the unlocking mechanism comprise the following structures:

1. the locking mechanism comprises a positioning pin, a spring and a positioning pin hole arranged on one side of the counterweight, the positioning pin is movably arranged in the positioning pin hole, the positioning pin is connected with the counterweight through the spring, one end of the positioning pin abuts against the control screen bracket under the elastic action of the spring, and a convex block is arranged on one side of the positioning pin; the unlocking mechanism is a starting pendulum bob capable of rotating around a rotating shaft, the starting pendulum bob is provided with a working surface matched with a lug of the positioning pin, pressing blocks are arranged on two sides of the lug of the working surface, and when the starting pendulum bob rotates relative to the rotating shaft, the pressing blocks are in contact with the lug of the positioning pin, so that the positioning pin moves by overcoming the elasticity of a spring, and the positioning pin is separated from the control screen support.

The working principle of the locking mechanism and the unlocking mechanism is as follows:

when the fan body and the control screen are in stable static states, the pendulum bob is started to be positioned under the action of self gravity and positioned under the rotating shaft, and similarly, the balance weight is also positioned under the rotating shaft under the action of self gravity, at the moment, the press block for starting the working face of the pendulum bob is positioned on two sides of the lug of the positioning pin and is not in contact with the lug of the positioning pin, so that the positioning pin is not subjected to the acting force for starting the working face of the pendulum bob and only subjected to the elastic force of the spring and the gravity of the positioning pin, the elastic force of the spring is greater than the gravity of the positioning pin, the positioning pin moves towards the direction of the control screen support until the top end of the positioning pin is abutted against the control screen support, and the acting force between the positioning pin and the control screen support plays a role in relatively fixing the rotating shaft and the control screen, and the control screen can be prevented from rotating randomly.

When the fan body starts to rotate, due to the locking effect of the positioning pin, the rotating shaft can rotate along with the rotation of the control screen support, but the starting pendulum is still kept under the rotating shaft under the action of the self gravity, when the fan body rotates to exceed a preset angle, the lug of the positioning pin can be in contact with the pressing block on one side of the rotating direction on the working face of the starting pendulum, the pressing block applies an acting force far away from the direction of the control screen support to the lug, the acting force drives the positioning pin to move towards the direction far away from the control screen support, so that the end part of the positioning pin is separated from the control screen support, the locking effect of the positioning pin is avoided, the counter weight can drive the rotating shaft to rotate under the action of the self gravity, the lug of the positioning pin is separated from the pressing block again, and the rotating shaft and the control screen support are locked together by the positioning pin.

The locking and unlocking processes are repeated along with the rotation of the fan body until the fan body is stabilized, and the counterweight stabilizes the control screen in an initial state.

Furthermore, the working face is further provided with limiting blocks for limiting the relative angle between the counter weight and the starting pendulum bob on two sides of the protruding block, when the fan body rotates rapidly, the counter weight can contact the limiting blocks, the positioning pin is in an unlocking state under the action of the pressing block at the moment, the counter weight can always keep and start the relative angle between the pendulum bobs, the positioning pin is kept in the unlocking state, and therefore the speed of the control screen for recovering the initial state is increased.

2. The locking mechanism comprises a positioning pin and a positioning pin through hole arranged on one side of the counterweight, and the positioning pin is movably arranged in the positioning pin through hole; the locking mechanism further comprises a cavity which is arranged in the counterweight and is provided with an opening at the bottom surface, a ball body is movably placed in the cavity, a positioning pin support of a seesaw structure is movably installed at the bottom of the cavity through a pin shaft, the top surface of one end of the positioning pin support is abutted against the bottom of the positioning pin, the top surface of the other end of the positioning pin support is contacted with the ball body, and under the action of gravity of the ball body, the positioning pin support jacks up the positioning pin, so that the top end of the positioning pin is abutted against the control screen support; the unlocking mechanism is a spring for connecting the positioning pin and the balance weight, and the elastic force of the spring enables the positioning pin to move in a direction away from the control screen support.

The working principle of the locking mechanism and the unlocking mechanism is as follows:

when the fan body and the control screen are both in a stable static state, the ball body is pressed at one end of the positioning pin support under the action of the gravity of the ball body, the lever action of the positioning pin support is utilized to jack the other end of the positioning pin support upwards, the jacking force is exerted on the positioning pin, the positioning pin overcomes the downward elastic force of the spring and moves upwards until the top end of the positioning pin abuts against the control screen support, the action force between the positioning pin and the control screen support plays a role in fixing the rotating shaft and the control screen relatively, and the control screen can be prevented from rotating randomly.

When the fan body starts to rotate, due to the locking effect of the positioning pin, the rotating shaft can rotate along with the rotation of the control screen support, so that the balance weight is driven to rotate synchronously, after the balance weight rotates, the ball body in the cavity of the balance weight can roll under the action of self gravity until part or all of the ball body is supported by the side wall of the cavity, the acting force applied to the positioning pin support by the ball body is smaller than the elastic force applied to the positioning pin by the spring, therefore, the positioning pin can move in the direction away from the control screen support under the action of the elastic force until the end part of the positioning pin is separated from the contact with the control screen support, the locking effect of the positioning pin is avoided, the balance weight can drive the rotating shaft to rotate under the action of self gravity until the ball body is supported on the positioning pin support again, and the rotating shaft and the control screen support are locked together by the positioning pin again.

The locking and unlocking processes are repeated along with the rotation of the fan body until the fan body is stabilized, and the counterweight stabilizes the control screen in an initial state.

Furthermore, the side wall of the cavity is an inclined plane which gradually inclines towards the center direction of the cavity from top to bottom, so that the ball body can roll to the side wall of the cavity more easily, and the unlocking speed is improved.

In addition, the angle control mechanism is controlled by a motor, and the following two schemes are adopted:

1. the angle control mechanism comprises a stepping motor, an inclination angle sensor, a positioning mechanism and a controller, wherein the stepping motor is fixed relative to the control screen bracket, the inclination angle sensor is used for detecting the inclination angle of the control screen, the positioning mechanism is used for marking the initial angle of the control screen, and the controller is used for controlling the stepping motor to work according to the information of the inclination angle sensor and the positioning mechanism; the stepping motor is connected with the rotating shaft through a transmission mechanism so as to drive the rotating shaft to rotate.

When the fan body is in an initial state and the control screen is stable, the angle between the control screen and the control screen support is an initial angle, the positioning mechanism sends information that the control screen is at the initial angle to the controller, and the controller controls the step motor to be out of work, so that the control screen and the fan body are kept relatively fixed; when the fan body starts to rotate, the stepping motor does not start to work, so that the control screen can synchronously rotate along with the fan body, the inclination angle sensor sends angle information of the control screen to the controller after detecting that the angle of the control screen changes, the controller controls the stepping motor to work according to the initial angle and the angle information, the stepping motor drives the rotating shaft and the control screen on the rotating shaft to rotate in the direction opposite to the rotating direction of the fan body until the angle of the control screen is restored to the initial angle, the positioning mechanism sends the information that the control screen is at the initial angle to the controller again, and the controller stops the work of the stepping motor at the moment. In this way, the stepping motor can be relied upon to make the angle of the control panel controllable (maintained in an initial upright state).

2. The angle control mechanism comprises a synchronous motor, an inclination angle sensor, a first microswitch and a second microswitch, wherein the synchronous motor is fixed relative to the position of the control screen bracket, the inclination angle sensor is used for detecting the inclination angle of the control screen, the first microswitch is positioned beside the rotating shaft and corresponds to the first state of the fan body and the second microswitch corresponds to the second state of the fan body respectively, and the fan bodies are vertical to each other in the first state and the second state; and a controller respectively connected with the tilt sensor, the synchronous motor and the microswitch; the synchronous motor is connected with the rotating shaft through a transmission mechanism so as to drive the rotating shaft to rotate; the rotating shaft is provided with a protruding contact piece, and the contact piece is contacted with the corresponding microswitch when the rotating shaft rotates to a first state or a second state relative to the fan body; and the controller controls the action of the synchronous motor according to the information of the inclination angle sensor and the microswitch.

When the fan body is in the first state and the control screen is stable, the contact piece on the rotating shaft is abutted against the first microswitch corresponding to the first state, so that the microswitch is in a closed state, the other second microswitch corresponding to the second state is in an open state, meanwhile, the inclination angle sensor detects that the inclination angle of the control screen is an initial angle (for example, 0 degree), and at the moment, the controller controls the synchronous motor to be in a non-working state, so that the control screen is kept at the initial angle. When the fan body rotates from the first state to the second state, the synchronous motor does not work, so the control screen can synchronously rotate along with the fan body, the controller detects that the inclination angle of the control screen is no longer the initial angle through the inclination angle sensor, the controller starts to control the synchronous motor to drive the rotating shaft to rotate at the moment, if the initial rotation direction of the rotating shaft is towards the first microswitch, the rotating shaft can immediately receive the resistance of the first microswitch, so that the synchronous motor reversely rotates, and the rotating shaft rotates towards the second microswitch when really rotating; after the contact leaves the first microswitch, the first microswitch is switched from a closed state to an open state; when the contact piece of the rotating shaft is abutted against the second microswitch, the second microswitch is switched from an open state to a closed state, and the controller controls the synchronous motor to stop rotating; and when the fan body continues to rotate, the controller can control the synchronous motor to continue to rotate until the fan body is stabilized in the second state, the controller detects that the inclination angle of the control screen is the initial angle through the inclination angle sensor, and the controller controls the synchronous motor to be in a non-working state, so that the control screen is kept 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, and the detailed description is omitted here. In this way, the angle of the control screen can be controlled (maintained in the initial upright position) by means of the synchronous motor. The controller can adopt a single chip microcomputer, and the details are not repeated herein.

The tower fan can automatically restore the control screen to the initial upright state after the angle of the fan body is adjusted, so that the tower fan is convenient for users to identify and use, and has good practicability.

Drawings

Fig. 1 and 2 are schematic views showing the overall structure of the tower fan of example 1 (the fan bodies are in the vertical and horizontal states, respectively).

Fig. 3 is a partial structural view at the control screen of the tower fan of embodiment 1.

Fig. 4 is an exploded view at the control panel of the tower fan of embodiment 1.

Fig. 5 is a partial sectional view at the control screen of the tower fan of embodiment 1.

Fig. 6 is a partial structural view at the control screen of the tower fan of embodiment 2.

Fig. 7 is a schematic front view of the activation pendulum in embodiment 2.

Fig. 8 is an exploded view at the control panel of the tower fan of example 2.

Fig. 9 is a partial sectional view at the control screen of the tower fan of embodiment 2.

Fig. 10 is a partial structural view at the control screen of the tower fan of embodiment 3.

Fig. 11 is an exploded view at the control panel of the tower fan of embodiment 3.

Fig. 12 is a partial sectional view at the control screen of the tower fan of embodiment 3.

FIG. 13 is a sectional view at the counterweight in example 3.

Fig. 14 and 15 are partial structural schematic diagrams of two different angles at the control screen of the tower fan of the embodiment 4.

Fig. 16 is an exploded view at the control panel of the tower fan of example 4.

Fig. 17 is a partial sectional view at the control screen of the tower fan of embodiment 4.

Fig. 18 is a partial structural view at the control screen of the tower fan of embodiment 5.

The figures are numbered: 1. a control screen bracket; 2. a bearing; 3. a control screen; 4. a rotating shaft; 5. a swing rod; 6. balancing weight; 7. positioning pins; 8. a spring; 9. a positioning pin hole; 10. a pipe body; 11. a sleeve; 12. starting a pendulum bob; 13. a working surface; 14. a bump; 15. briquetting; 16. a limiting block; 17. a positioning pin through hole; 18. a cavity; 19. a sphere; 20. a locating pin support; 21. a stepping motor; 22. a tilt sensor; 23. a metal marker sheet; 24. a metal proximity switch; 25. a synchronous motor; 26. a first microswitch; 27. a second microswitch; 28. a contact piece; 29. a gear transmission mechanism; 30. a fixed seat; 31. a column; 32. a fan body; 33. and (4) an air outlet grid.

Detailed Description

The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.

Example 1:

the embodiment provides a tower fan capable of automatically adjusting the angle of a control screen, and the control screen of the tower fan can still keep an upright posture when a fan body rotates, so that a user can use the tower fan conveniently.

As shown in fig. 1 to 5, the tower fan structure for automatically adjusting the angle of the control panel of the embodiment is as follows: this tower fan is including the fixing base 30 that is equipped with vertical column 31 to and the fan body 32 of rotationally connecting on vertical column 31 through the pivot, fan body 32 is inside to have rotatory fan blade, fan body 32 is provided with air outlet grille 33 in its front, the top front of fan body 32 is equipped with the control screen 3 that is used for controlling tower fan work and information such as display temperature, mode, of course, according to the needs of difference, control screen 3 can also set up in bottom or central position department of fan body 32, stand 31 is located the back of fan body 32, above-mentioned structure such as rotatory fan blade, air outlet grille is the same with traditional tower fan, no longer repeated here.

The fan comprises a fan body and is characterized in that a control screen support 1 is integrally arranged at the top end inside the fan body or is fixed with the fan body through clamping, bolt fixing and the like, the angle of the control screen support 1 is the angle of the fan body 32, a bearing 2 is arranged at the central position of the control screen support 1, a protruding rotating shaft 4 parallel to a pivot is arranged at the inner side end of the control screen 3, the rotating shaft 4 penetrates through the bearing 2, the control screen 3 is rotatably arranged on the control screen support 1, and an angle control mechanism used for enabling the control screen 3 to be in a preset angle after the fan body 32 is static is arranged at the position of the rotating shaft 4.

In this embodiment, the angle control mechanism is a counterweight 6 fixedly connected to the rotating shaft 4 through a swing rod 5, and the existence of the swing rod 5 causes the gravity center of the counterweight 6 to be far away from the axis of the rotating shaft 4. The counterweight 6 always tends to hang under the rotating shaft 4 under the action of its own gravity, and this tendency will apply an acting force to the rotating shaft 4, and this acting force will make the rotating shaft 4 maintain or return to the original initial state (i.e. the state where the counterweight 6 is located under the rotating shaft 4) after the fan body 32 rotates, so, as long as the control screen 3 is just in the forward state when the rotating shaft 4 is in the initial state during the design, it can be ensured that no matter how the fan body 32 rotates, the control screen 3 will still return to the forward state within a short time under the action of the counterweight 6, and the characters or patterns on it can be identified easily.

Example 2:

in embodiment 1, the angle of the control panel 3 is controlled by the counterweight 6, and when the fan body 32 slightly shakes due to the touch of others or the motor itself, the control panel 3 rotates slightly, which affects normal use. As shown in fig. 4 to 7, in order to solve this problem, in this embodiment, a locking mechanism for locking the rotating shaft 4 and the control panel bracket 1 relatively 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 panel bracket 1 move relatively. The locking mechanism can ensure that the rotating shaft 4 cannot rotate randomly when the fan body 32 slightly shakes, so that the stability of the control screen 3 is ensured; and after the unlocking mechanism detects that the fan body 32 rotates beyond a certain angle, the unlocking mechanism can automatically unlock the locking mechanism, so that the rotating shaft 4 and the control screen support 1 move relatively, and at the moment, the control screen 3 can automatically return to the initial state under the action of the counterweight 6.

Specifically, in this embodiment, the locking mechanism includes a positioning pin 7, a spring 8, and a positioning pin hole 9 disposed on a side of the counterweight 6 and facing the direction of the rotating shaft 4, the positioning pin 7 is movably mounted in the positioning pin hole 9, the positioning pin 7 is connected with the counterweight 6 through the spring 8, and a pipe body 10 sleeved on the rotating shaft 4 is disposed on one side of the control panel bracket 1; the spring 8 is in a compressed state, and the top end of the positioning pin 7 is abutted against the tube body 10 of the control screen bracket 1 under the action of the elastic force of the spring 8; the unlocking mechanism is a starting pendulum 12 which is movably sleeved on the pipe body 10 through a sleeve 11 and can rotate around the rotating shaft 4, and the starting pendulum 12 naturally rotates to the position right below the rotating shaft 4 under the action of self 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; the side, facing the starting pendulum 12, of the positioning pin 7 is provided with a convex block 14, the side, facing the positioning pin 7, of the starting pendulum 12 is a working surface 13 matched with the convex block 14 of the positioning pin 7, pressing blocks 15 are arranged on two sides of the convex block 14 of the working surface 13, and when the starting pendulum 12 rotates relative to the rotating shaft 4, the pressing blocks 15 are in contact with the convex block 14 of the positioning pin 7, so that the positioning pin 7 moves against the elastic force of the spring 8, and the positioning pin 7 is separated from the contact with the control screen support 1.

The working principle of the locking mechanism and the unlocking mechanism is as follows:

when the fan body 32 and the control panel 3 are both in a stable static state, the starting pendulum bob 12 is positioned under the action of the self gravity and under the rotating shaft 4, and similarly, the counterweight 6 is also positioned under the action of the self gravity and under the rotating shaft 4, at this time, the pressing blocks 15 of the starting pendulum bob 12 are positioned on two sides of the projection 14 of the positioning pin 7 and are not in contact with the projection 14 of the positioning pin 7, so that the positioning pin 7 is not subjected to the downward acting force of the working surface 13 of the starting pendulum bob 12 and is only subjected to the elastic force of the spring 8 and the self gravity of the positioning pin 7, the elastic force of the spring 8 is greater than the gravity of the positioning pin 7, so that the positioning pin 7 moves towards the direction (namely upwards) of the control panel bracket 1 until the top end of the positioning pin 7 abuts against the tube body 10 of the control panel bracket 1, and the acting force between the positioning pin 7 and the control panel bracket 1 plays a role of relatively fixing the rotating shaft 4 and the control panel 3, it is possible to avoid the control panel 3 from rotating at will.

When the fan body 32 starts to rotate, the rotating shaft 4 rotates along with the rotation of the control panel bracket 1 due to the locking action of the positioning pin 7, but the starting pendulum 12 is still kept under the rotating shaft 4 under the action of the self gravity, when the fan body 32 rotates beyond a preset angle, the lug 14 of the positioning pin 7 is in contact with the pressing block 15 on one side of the rotating direction on the working surface 13 of the starting pendulum 12, the pressing block 15 applies an acting force to the lug 14 in a direction away from the control panel bracket 1 (namely downward), the acting force drives the positioning pin 7 to move in a direction away from the control panel bracket 1 (namely downward), so that the top end of the positioning pin 7 is separated from the pipe body 10 of the control panel bracket 1, the locking action of the positioning pin 7 is not available, the counterweight 6 drives the rotating shaft 4 to rotate under the action of the self gravity until the lug 14 of the positioning pin 7 is separated from the pressing block 15 again, the positioning pin 7 locks the rotating shaft 4 and the control panel bracket 1 together again.

The above locking and unlocking processes are repeated with the rotation of the fan body 32 until the fan body 32 is stabilized, and the counterweight 6 stabilizes the control panel 3 in the initial state.

In the present embodiment, the working surface 13 is further provided with a stopper 16 on both sides of the projection 14 for limiting the relative angle between the weight 6 and the starting pendulum 12, specifically, the stopper 16 is located below the outer side of the pressing piece 15 on the corresponding side and close to the pressing piece 15. When the fan body 32 rotates rapidly, the counterweight 6 can contact the limiting block 16, the positioning pin 7 is in an unlocking state under the action of the pressing block 15, and under the limiting action of the limiting block 16, the counterweight 6 can always keep a relative angle with the starting pendulum bob 12, so that the positioning pin 7 is kept in the unlocking state, and the speed of the control screen 3 for recovering the initial state is increased.

Example 3:

in embodiment 1, the angle of the control panel 3 is controlled by the counterweight 6, and when the fan body 32 slightly shakes due to the touch of others or the motor itself, the control panel 3 rotates slightly, which affects normal use. To solve this problem, in the present embodiment, a locking mechanism for locking the rotating shaft 4 and the control panel bracket 1 relative to each other and an unlocking mechanism for unlocking the locking mechanism when the fan body 32 rotates to move the rotating shaft 4 and the control panel bracket 1 relative to each other are provided at the counterweight 6. The locking mechanism can ensure that the rotating shaft 4 cannot rotate randomly when the fan body 32 slightly shakes, so that the stability of the control screen 3 is ensured; and after the unlocking mechanism detects that the fan body 32 rotates beyond a certain angle, the unlocking mechanism can automatically unlock the locking mechanism, so that the rotating shaft 4 and the control screen support 1 move relatively, and at the moment, the control screen 3 can automatically return to the initial state under the action of the counterweight 6.

Specifically, as shown in fig. 8 to 11, in the present embodiment, a tube 10 sleeved on the rotating shaft 4 is disposed on one side of the control panel bracket 1; the locking mechanism comprises a positioning pin 7 and a positioning pin through hole 17 which is arranged on one side of the balance weight 6 and faces the direction of the rotating shaft 4, the positioning pin 7 is movably arranged in the positioning pin through hole 17, and the top end and the bottom end of the positioning pin 7 are respectively exposed out of the upper end and the lower end of the positioning pin through hole 17; the locking mechanism further comprises a cavity 18 arranged in the counterweight 6 and provided with an opening at the bottom, a steel ball 19 is movably placed in the cavity 18, a positioning pin support 20 of a seesaw structure is movably mounted at the bottom of the cavity 18 through a pin shaft, the top surface of one end of the positioning pin support 20 is abutted against the bottom of the positioning pin 7, and the top surface of the other end of the positioning pin support is contacted with the bottom of the ball 19. The unlocking mechanism is a spring 8 for 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 enables the positioning pin 7 to move in a direction (namely downwards) which tends to be away from the control screen support 1, so that the top end of the positioning pin 7 is separated from the contact with the tube body 10 of the control screen support 1.

The working principle of the locking mechanism and the unlocking mechanism is as follows:

when the fan body 32 and the control panel 3 are both in a stable static state, the ball 19 is pressed at one end of the positioning pin support 20 under the action of the gravity of the ball, the lever action of the positioning pin support 20 is utilized to jack up the other end of the positioning pin support 20, the jacking force is applied to the positioning pin 7, the positioning pin 7 overcomes the downward elastic force of the spring 8 to move upwards 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 fixing the rotating shaft 4 and the control panel 3 relatively, and the control panel 3 can be prevented from rotating randomly.

When the fan body 32 starts to rotate, the rotating shaft 4 rotates along with the rotation of the control panel bracket 1 due to the locking action of the positioning pin 7, so as to drive the counterweight 6 to synchronously rotate, after the counterweight 6 rotates, the ball 19 in the cavity 18 of the counterweight 6 rolls under its own weight until part or all of the ball 19 is supported by the side wall of the cavity 18 (as shown in fig. 11), at which time the force exerted by the ball 19 on the positioning pin support 20 is smaller than the spring force exerted by the spring 8 on the positioning pin 7, therefore, the positioning pin 7 moves towards the direction far away from the control screen support 1 under the action of elastic force until the end part of the positioning pin 7 is separated from the control screen support 1, the counterweight 6 drives the rotating shaft 4 to rotate under the action of self gravity without the locking action of the positioning pin 7 until the sphere 19 is completely supported on the positioning pin support 20 again, and the positioning pin 7 locks the rotating shaft 4 and the control screen support 1 together again.

The above locking and unlocking processes are repeated with the rotation of the fan body 32 until the fan body 32 is stabilized, and the counterweight 6 stabilizes the control panel 3 in the initial state.

In this embodiment, the side wall of the cavity 18 is a slope gradually inclined from top to bottom toward the center of the cavity 18, so that the ball 19 can roll onto the side wall of the cavity 18 more easily, thereby increasing the unlocking speed.

Example 4:

as shown in fig. 12 to 15, different from embodiments 1, 2 and 3, the angle control mechanism in this embodiment includes a stepping motor 21 fixed on one side of the control panel bracket 1, an inclination sensor 22 fixed on one side of the control panel 3 for detecting an inclination angle of the control panel 3, a positioning mechanism for marking an initial angle of the control panel 3, and a controller (not shown in the figure) for controlling the operation of the stepping motor 21 according to information of the inclination sensor 22 and the positioning mechanism; the stepping motor 21 is connected with the rotating shaft 4 through a gear transmission mechanism 29 so as to drive the rotating shaft 4 to rotate; the positioning mechanism consists of a metal marking sheet 23 fixed on a gear of the rotating shaft 4 and a metal proximity switch 24 fixed on the control screen bracket 1.

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 support 1 is the initial angle, at this time, the metal proximity switch 24 in the positioning mechanism is triggered because the distance between the metal proximity switch and the metal marker sheet 23 is smaller than the preset distance, so that the information that the control screen 3 is at the initial angle is sent to the controller, and the controller controls the step motor 21 not to work, so that the control screen 3 and the fan body 32 are kept relatively fixed;

when the fan body 32 starts to rotate, because the stepping motor 21 does not start to operate, the control panel 3 rotates synchronously with the fan body 32, the tilt angle sensor 22 sends angle information of the control panel 3 to the controller after detecting that the angle of the control panel 3 changes, the controller controls the stepping motor 21 to operate according to the initial angle and the angle information, so that the stepping motor 21 drives the rotating shaft 4 and the control panel 3 thereon to rotate in the direction opposite to the rotating direction of the fan body 32 until the angle of the control panel 3 returns to the initial angle, the metal proximity switch 24 is triggered again, and the controller stops the operation of the stepping motor 21 at this time. Thus, the angle of the control panel 3 can be controlled by the stepping motor 21 and maintained in the upright state.

Example 5:

as shown in fig. 16, different from embodiment 4, the angle control mechanism of this embodiment includes a synchronous motor 25 fixed in position relative to the control panel bracket 1, a tilt sensor 22 for detecting the tilt angle of the control panel 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 of the fan body, respectively, and a controller (the controller is not shown in the figure, and a single chip microcomputer can be specifically used) connected to the tilt sensor 22, the synchronous motor 25, the first microswitch 26 and the second microswitch 27, respectively; the first microswitch 26 and the second microswitch 27 are both fixed on the control panel bracket 1 and located beside the rotating shaft 4, the fan bodies 32 are perpendicular to each other in the first state and the second state (in this embodiment, the first state is that the fan bodies 32 are in a perpendicular state, and the second state is that the fan bodies 32 are in a horizontal state), and the synchronous motor 25 is connected with the rotating shaft 4 through the gear transmission mechanism 29 to drive the rotating shaft 4 to rotate; the rotating shaft 4 is provided with a protruding contact piece 28, and the contact piece 28 is contacted with the corresponding microswitch when the rotating shaft 4 rotates to a first state or a second state relative to the fan body 32; the controller controls the action of the synchronous motor 25 according to the information of the inclination angle sensor 22 and the micro switch.

When the fan body 32 is in the first state and the control panel 3 is stable, the contact 28 on the rotating shaft 4 abuts against the first microswitch 26 corresponding to the first state, so that the microswitch is in a closed state, while the other second microswitch 27 corresponding to the second state is in an open state, and meanwhile, the tilt angle sensor 22 detects that the tilt angle of the control panel 3 is an initial angle (for example, 0 degree), at this time, the controller controls the synchronous motor 25 to be in a non-working state, so that the control panel 3 is kept at the initial angle. When the fan body 32 rotates from the first state to the second state, because the synchronous motor 25 does not work, the control panel 3 can synchronously rotate along with the fan body 32, the controller detects that the inclination angle of the control panel 3 is no longer the initial angle through the inclination angle sensor 22, at this time, the controller starts to control the synchronous motor 25 to drive the rotating shaft 4 to rotate, if the initial rotation direction of the rotating shaft 4 is towards the first microswitch 26, the rotating shaft 4 can immediately receive the resistance of the first microswitch 26, so that the synchronous motor 25 rotates reversely, and therefore, when the rotating shaft 4 actually rotates, the rotating shaft 4 rotates towards the second microswitch 27; after the contact 28 leaves the first microswitch 26, the first microswitch 26 is switched from the closed state to the open state; when the contact 28 of the rotating shaft 4 abuts against the second microswitch 27, the second microswitch 27 is switched from the off state to the on state, and the controller controls the synchronous motor 25 to stop rotating; when the fan body 32 continues to rotate, the controller controls the synchronous motor 25 to continue to rotate until the fan body 32 is stabilized in the second state, the controller detects that the inclination angle of the control screen 3 is the initial angle through the inclination sensor 22, and the controller controls the synchronous motor 25 to be in the non-working state, so that the control screen 3 is kept at the initial angle.

When the fan body 32 rotates from the second state to the first state, the rotation control of the control panel 3 is opposite to the above process, and will not be described herein again. In this way, the angle of the control panel 3 can be controlled (maintained in the initial upright state) by means of the synchronous motor 25.

The utility model has been described in connection with the accompanying drawings, it is to be understood that the utility model is not limited in its application to the details of construction and the arrangement of the components set forth in the following description, as long as the utility model is capable of being practiced without modification in any way whatsoever, and is capable of other applications without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A tower fan capable of automatically adjusting the angle of a control screen comprises a fixed seat provided with a stand column and a fan body rotatably connected to the stand column through a pivot, wherein a control screen support is fixedly arranged on the fan body, and the control screen is arranged on the control screen support; the fan is characterized in that the control screen is movably arranged on the control screen bracket by utilizing a rotating shaft parallel to the pivot, and an angle control mechanism used for enabling the control screen to form a preset angle after the fan body is static is arranged at the rotating shaft.

2. The tower fan capable of automatically adjusting the angle of the control screen according to claim 1, wherein the upright posts are located on the back side of the fan body, the control screen is located on the front side of the fan body, and the air outlet grille of the fan body is arranged on the front side or the front side and the side surface of the fan body.

3. The tower fan capable of automatically adjusting the angle of the control panel according to claim 1 or 2, wherein the angle control mechanism comprises a counterweight fixedly connected to the rotating shaft, and the center of gravity of the counterweight is offset from the axis center of the rotating shaft.

4. The tower fan capable of automatically adjusting the angle of the control panel according to claim 3, wherein a locking mechanism for locking the rotating shaft and the support of the control panel relatively is arranged at the counterweight, and an unlocking mechanism for unlocking the locking mechanism when the fan body rotates so as to enable the rotating shaft and the support of the control panel to move relatively.

5. The tower fan capable of automatically adjusting the angle of the control screen according to claim 4, wherein the locking mechanism comprises a positioning pin, a spring and a positioning pin hole arranged on one side of the counterweight, the positioning pin is movably arranged in the positioning pin hole, the positioning pin is connected with the counterweight through the spring, one end of the positioning pin abuts against the control screen bracket under the elastic force of the spring, and a convex block is arranged on one side of the positioning pin; the unlocking mechanism is a starting pendulum bob capable of rotating around a rotating shaft, the starting pendulum bob is provided with a working surface matched with a lug of the positioning pin, pressing blocks are arranged on two sides of the lug of the working surface, and when the starting pendulum bob rotates relative to the rotating shaft, the pressing blocks are in contact with the lug of the positioning pin, so that the positioning pin moves by overcoming the elasticity of a spring, and the positioning pin is separated from the control screen support.

6. The tower fan capable of automatically adjusting the angle of the control screen according to claim 5, wherein the working surface is further provided with limiting blocks on two sides of the projection for limiting the relative angle between the counter weight and the starting pendulum bob.

7. The tower fan capable of automatically adjusting the angle of the control screen according to claim 4, wherein the locking mechanism comprises a positioning pin and a positioning pin through hole arranged on one side of the counterweight, and the positioning pin is movably arranged in the positioning pin through hole; the locking mechanism further comprises a cavity which is arranged in the counterweight and is provided with an opening at the bottom surface, a ball body is movably placed in the cavity, a positioning pin support of a seesaw structure is movably installed at the bottom of the cavity through a pin shaft, the top surface of one end of the positioning pin support is abutted against the bottom of the positioning pin, the top surface of the other end of the positioning pin support is contacted with the ball body, and under the action of gravity of the ball body, the positioning pin support jacks up the positioning pin, so that the top end of the positioning pin is abutted against the control screen support; the unlocking mechanism is a spring for connecting the positioning pin and the balance weight, and the elastic force of the spring enables the positioning pin to move in a direction away from the control screen support.

8. The tower fan capable of automatically adjusting the angle of the control panel according to claim 7, wherein the sidewall of the cavity is an inclined surface which is gradually inclined toward the center of the cavity from top to bottom.

9. The tower fan for automatically adjusting the angle of the control panel according to claim 1 or 2, wherein the angle control mechanism comprises a stepping motor fixed relative to the position of the control panel bracket, a tilt sensor for detecting the tilt 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 stepping motor according to the information of the tilt sensor and the positioning mechanism; the stepping motor is connected with the rotating shaft through a transmission mechanism so as to drive the rotating shaft to rotate.

10. The tower fan for automatically adjusting the angle of the control panel according to claim 1 or 2, wherein the angle control mechanism comprises a synchronous motor fixed relative to the support of the control panel, a tilt sensor for detecting the tilt 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 of the fan body, respectively, the fan bodies are perpendicular to each other in the first state and the second state; and a controller respectively connected with the tilt sensor, the synchronous motor and the microswitch; the synchronous motor is connected with the rotating shaft through a transmission mechanism so as to drive the rotating shaft to rotate; the rotating shaft is provided with a protruding contact piece, and the contact piece is contacted with the corresponding microswitch when the rotating shaft rotates to a first state or a second state relative to the fan body; and the controller controls the action of the synchronous motor according to the information of the inclination angle sensor and the microswitch.

Images