A rotary control mechanism

Abstract

This invention relates to the field of control mechanism technology, specifically disclosing a rotation control mechanism. The invention includes a control structure comprising a worm gear motor, a worm wheel, a second pulley, a belt, a circuit board, a tray, and a first pulley. A metal electrode plate is disposed on the tray, and two circuit board metal electrodes are disposed on the circuit board. The worm gear motor drives the worm wheel to rotate, and the belt drive causes the tray to rotate. The capacitance value is adjusted by the overlap of the metal electrode plate and the circuit board metal electrodes. The rotation angle is finely adjusted by controlling the capacitance value. It offers high tolerance and good controllability. The combination of the tray, sliding block, moving parts, connecting rod, and fixed plate forms a mechanical adjustment structure to regulate the left and right rotation speed. Furthermore, this mechanical adjustment structure is independent and unaffected by interference from other structures.

Description

Technical Field

[0001] This invention relates to the field of control mechanism technology, and more particularly to a rotary control mechanism. Background Technology

[0002] Many mechanical devices and electrical appliances have rotation and oscillation mechanisms, such as electric fans. The current control scheme is to drive the stepper motor by controlling the circuit. This control scheme is driven by the stepper motor, which is costly and the circuit control is relatively complex. Therefore, there is an urgent need for a rotation control mechanism with a simple structure, high tolerance, and good controllability. Summary of the Invention

[0003] (I) Technical problem to be solved by the present invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a rotation control mechanism that has the function of finely adjusting the rotation angle by controlling the capacitance value, with high tolerance, good controllability, and adjustable rotation speed, so as to solve the problems of existing control schemes that use multi-step motor drives, have high costs, relatively complex circuit control, and cannot adjust left and right rotation.

[0005] (II) Technical Solution

[0006] To address the above problems, the present invention provides a rotation control mechanism.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a rotary control mechanism comprising a fan, an upper cover, a lower cover, a fixed cover, and a rotating component. The lower cover is located below the upper cover and the two are connected. The upper cover is provided with a fixed cover and a rotating component above it. The upper cover and the fixed cover are fixed by screws. The fixed cover and the rotating component are movably coupled. The rotating component is restricted by the fixed cover to only rotate. The lower cover has a control structure inside. The vertical shaft of the fan passes through the rotating component and engages with the control structure.

[0008] In one feasible technical solution, the control structure comprises a worm motor, a worm gear, a second pulley, a belt, a rotating movable component, a circuit board, and a first pulley. The rotating movable component, the first pulley, and the second pulley are driven by a belt. The first pulley is mounted on the worm gear, and the worm gear meshes with the worm of the worm motor. A circuit board is provided below the rotating movable component, and two circuit board metal electrodes are fixed on the circuit board. The rotating movable component includes a tray, and metal electrode plates are fixed on the bottom surface of the tray.

[0009] Furthermore, the worm gear motor is located on the side of the worm wheel away from the second pulley, the circuit board has a semi-circular opening, the center of the semi-circular opening is concentric with the center of the tray, the two circuit board metal electrodes are at the same circumferential position on the circuit board, the distance between the circuit board metal electrode and the center of the semi-circular opening is equal to the distance between the metal electrode sheet and the center of the tray, so that the metal electrode sheet can overlap with the circuit board metal electrode as the tray rotates and can completely overlap.

[0010] The capacitance value can be used as a buffer or for fine-tuning. When a set value is determined, further actions can be taken, such as reducing the electrode speed or changing the direction of rotation. When the capacitance signal gradually increases or decreases, the electrode speed can be gradually increased or decreased to achieve a certain control logic.

[0011] As the metal electrode plate moves to the left (towards the metal electrodes on the circuit board), its capacitance begins to increase, sensing an electrical signal. The capacitance value during the period when it reaches its maximum capacitance can be used as a setpoint for adjustment. Assuming the maximum capacitance is [value missing], we set its value to A (between 0 and 1). This value can be set and will affect the adjustment position. Once the set value is reached, we can either reverse the movement of the metal electrode plate or stop it.

[0012] In one feasible technical solution, the rotating movable assembly further includes sliding blocks, connecting rods, movable parts, and fixed plates. Three sliding blocks are provided on the side of the tray away from the circuit board. A movable part is provided above the tray. The bottom of the movable part is movably connected to the sliding blocks at three equal intervals via connecting rods. A fixed plate that cooperates with the tray is provided between two adjacent sliding blocks. One end of the connecting rod is connected to the movable part via a pivot, and the other end of the connecting rod is rotatably connected to the sliding block, so that the movable part can move up and down.

[0013] Furthermore, the top surface of the tray is provided with a hollow ring integrated with it. The outer wall of the hollow ring is integrally connected to three equal parts with limit plates. The surfaces of two adjacent limit plates are parallel to each other, and an movable opening is formed between two adjacent limit plates to cooperate with the sliding block. This movable opening is used to restrict the sliding block to slide in one direction.

[0014] The second pulley is also equipped with a bracket, and the support rod of the bracket is equipped with a spring to provide additional pressure when the belt is loose, so as to keep the belt at a certain tension and ensure reliable transmission.

[0015] The sliding block is provided with a belt groove that cooperates with the belt drive, and the belt groove can accommodate the belt.

[0016] The movable part has an external thread on its outer wall, which engages with the rotating part. When the rotating part rotates, the movable part moves up and down.

[0017] The limiting plate has two uprights that are perpendicularly connected to the tray, and these uprights are used to fix the plate in place.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] (1) The present invention provides a rotation control mechanism, which drives the worm wheel to rotate through the rotation of the worm motor, and rotates the tray through the first pulley, the second pulley and the belt, causing the metal electrode plate on the tray to be displaced. When the metal electrode plate reaches the metal electrode of the circuit board, there is a process of overlap between the metal electrode plate and the metal electrode of the circuit board starting from zero. In this way, the overlap area will gradually increase, the capacitance value will gradually increase, and the signal sensed by the capacitor will be larger. When the capacitance signal gradually increases or decreases, the rotation speed of the electrode can be gradually increased or decreased to achieve a certain control logic.

[0021] (2) The present invention provides a rotary control mechanism, which causes the movable part to move up and down by rotating the rotating part. The up and down movement of the movable part will drive the sliding block to slide and extend under the limit of the limiting plate through the connecting rod. Therefore, the entire tray can be expanded or reduced, forming a belt drive with a variable reduction ratio between the first pulley and the second pulley. Because the second pulley is equipped with a bracket and a spring, the belt will be loosened or tightened when the reduction ratio is adjusted. The combination of the bracket and the spring will provide additional pressure when the belt is loose, so that the belt maintains a certain tension and ensures reliable transmission.

[0022] In summary, the present invention provides a rotation control mechanism that finely adjusts the rotation angle by controlling the capacitance value, offering high tolerance and good controllability. The left and right rotation speeds are adjusted mechanically, and the mechanical adjustment structure is independent and unaffected by other structures. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a rotation control mechanism according to the present invention.

[0024] Figure 2 This is a cross-sectional view of the rotation control structure of the present invention;

[0025] Figure 3 This is a bottom perspective view of the control structure of the present invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the circuit board of the present invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the tray of the present invention;

[0028] Figure 6 This is an exploded view of the control structure of the present invention;

[0029] Figure 7 This is a three-dimensional sectional view of the cooperation between the control structure and the rotating component of the present invention;

[0030] Figure 8 This is a top view of the first working state of the control structure of the present invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the rotating movable component of the present invention in the first state;

[0032] Figure 10 This is a top view of the second operating state of the control structure of the present invention;

[0033] Figure 11 A three-dimensional structural schematic diagram of the rotating movable component of the present invention in the second state;

[0034] Figure 12 This is a three-dimensional structural diagram of the rotating movable component of the present invention in an inverted state;

[0035] Figure 13 This is a schematic diagram of the structure of the sliding block and the tray in this invention.

[0036] Figure 14 This is a schematic diagram of the operation of the control structure of the present invention.

[0037] In the diagram: Fan-1, Upper cover-2, Lower cover-3, Fixed cover-4, Rotating component-5, Worm gear motor-6, Worm wheel-7, Second pulley-8, Belt-9, Rotating movable component-10, Circuit board-11, First pulley-12, Circuit board metal electrode-13, Tray-101, Metal electrode plate-100, Sliding block-102, Movable component-104, Connecting rod-103, Fixed plate-105, Hollow ring-106, Limiting plate-107, Bracket-81, Spring-82. Detailed Implementation

[0038] To make the technical means, creative features, objectives, and effects of this invention easily understandable, Figures 1 to 14 The diagram illustrates the structure of a rotation control mechanism according to an embodiment of the present invention. The present invention will be further described below with reference to specific embodiments.

[0039] Example 1

[0040] like Figures 1-4As shown, the present invention provides a rotation control mechanism, including a fan 1, an upper cover 2, a lower cover 3, a fixed cover 4, and a rotating component 5. The lower cover 3 is located below the upper cover 2 and the two are connected. The fixed cover 4 and the rotating component 5 are provided above the upper cover 2. The upper cover 2 and the fixed cover 4 are fixed by screws. The fixed cover 4 and the rotating component 5 are movably engaged. The rotating component 5 is constrained by the fixed cover 4 and can only rotate. The lower cover 3 has a control structure x inside. The vertical shaft of the fan 1 passes through the rotating component 5 and engages with the control structure x.

[0041] The control structure x consists of a worm motor 6, a worm wheel 7, a second pulley 8, a belt 9, a rotating movable component 10, a circuit board 11, and a first pulley 12. The rotating movable component 10, the first pulley 12, and the second pulley 8 are driven by the belt 9. The first pulley 12 is mounted on the worm wheel 7, and the worm wheel 7 meshes with the worm of the worm motor 6. The circuit board 11 is located below the rotating movable component 10.

[0042] Two circuit board metal electrodes 13 are fixed on the circuit board 11;

[0043] The rotating movable component 10 includes a tray 101, on the bottom surface of which a metal electrode sheet 100 is fixed.

[0044] The worm motor 6 is located on the side of the worm wheel 7 away from the second pulley 8. The circuit board 11 has a semi-circular opening, the center of which is concentric with the center of the tray 101. The two circuit board metal electrodes 13 are at the same circumferential position on the circuit board 11. The distance between the circuit board metal electrode 13 and the center of the semi-circular opening is equal to the distance between the metal electrode sheet 100 and the center of the tray 101, so that the metal electrode sheet 100 can overlap with the circuit board metal electrode 13 as the tray 101 rotates and can completely overlap.

[0045] The capacitance value can be used as a buffer or for fine-tuning. When a set value is determined, further actions can be taken, such as reducing the electrode speed or changing the direction of rotation. When the capacitance signal gradually increases or decreases, the electrode speed can be gradually increased or decreased to achieve a certain control logic.

[0046] like Figure 14 As shown, when the metal electrode 100 moves to the left (towards the metal electrode 13 on the circuit board), its capacitance begins to increase, sensing an electrical signal. The capacitance value during the period when it reaches its maximum capacitance can be used as a setpoint for adjustment. Assuming the maximum capacitance is 1, we set the value to A (between 0 and 1). This value can be set and will affect the adjustment position. Once the set value is reached, we can move the metal electrode in the opposite direction or stop it.

[0047] The working principle of the above embodiments is explained below:

[0048] In use, the worm gear motor 6 is started, which drives the worm wheel 7 to rotate. The first pulley 12, the second pulley 8, and the belt 9 rotate the tray 101, causing the metal electrode plate 100 on the tray 101 to shift. When the metal electrode plate 100 reaches the metal electrode 13 on the circuit board, there is a process of overlap between the metal electrode plate 100 and the metal electrode 13 on the circuit board, starting from zero. In this way, the overlapping area gradually increases, the capacitance value gradually increases, and the signal sensed by the capacitor becomes stronger. This mechanism control scheme can be used in the oscillation mechanism of a fan, and further allows the user to select the oscillation angle. The structure is simple and lightweight. Of course, this control structure is not limited to fans, but can also be used in the control mechanisms of other devices.

[0049] Example 2

[0050] Please see Figure 1-14 Further implementation based on embodiment 1: wherein the rotating movable component 10 further includes a sliding block 102, a connecting rod 103, a movable component 104, and a fixing plate 105. Three sliding blocks 102 are provided on the side of the tray 101 away from the circuit board 11. A movable component 104 is provided above the tray 101. The bottom three equal parts of the movable component 104 are movably connected to the sliding blocks 102 through the connecting rod 103. A fixing plate 105 that cooperates with the tray 101 is provided between two adjacent sliding blocks 102. One end of the connecting rod 103 is connected to the movable component 104 through a rotating shaft, and the other end of the connecting rod 103 is rotatably connected to the sliding block 102, so that the movable component 104 can move up and down.

[0051] The tray 101 has a hollow ring 106 integrated with it at the center of its top surface. The outer wall of the hollow ring 106 is integrally connected to three equal parts of the limit plate 107. The plates of two adjacent limit plates 107 are parallel to each other, and an movable opening is formed between two adjacent limit plates 107 to cooperate with the sliding block 102. This movable opening is used to limit the sliding block 102 to slide in one direction.

[0052] The second pulley 8 is also equipped with a bracket 81. The support rod of the bracket 81 is equipped with a spring 82, which provides additional pressure when the belt is loose, so that the belt maintains a certain tension and ensures reliable transmission.

[0053] The sliding block 102 is provided with a belt groove that is engaged with the belt 9 for transmission, and the belt groove can accommodate the belt 9.

[0054] The outer wall of the movable part 104 is provided with an external thread, which is threadedly engaged with the rotating part 5. When the rotating part 5 rotates, the movable part 104 will move up and down.

[0055] The limiting plate 107 has two uprights that are vertically connected to the tray 101. These uprights are used to fix the plate 105 in place.

[0056] The tray 101 is provided with three sliding blocks 102. Each sliding block 102 is connected to a movable part 104 above the sliding block 102 via a connecting rod 103. The expansion and contraction of the sliding block is adjusted by rotating the movable part 104.

[0057] The working principle of the above embodiments is explained below:

[0058] By rotating the rotating part 5, since the rotating part 5 is threadedly engaged with the movable part 104, the rotating part 5 will cause the movable part 104 to move up and down when it rotates. The up and down movement of the movable part 104 will drive the sliding block 102 to slide and extend under the limit of the limiting plate 107 through the connecting rod 103. Therefore, the entire tray 104 can be expanded or reduced, forming a belt drive with a variable reduction ratio between it and the first pulley 12 and the second pulley 8.

[0059] Because the second pulley 8 is equipped with a bracket 81 and a spring 82, the belt will become loose or tight when the reduction ratio is adjusted. The combination of the bracket 81 and the spring 82 will provide additional pressure when the belt is loose, so that the belt maintains a certain tension and ensures reliable transmission.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary control mechanism, comprising a fan (1), characterized in that: Includes an upper cover (2), a lower cover (3), a fixed cover (4), and a rotating component (5). The lower cover (3) is located below the upper cover (2) and the two are connected. The upper cover (2) is provided with a fixed cover (4) and a rotating component (5). The upper cover (2) and the fixed cover (4) are fixed by screws. The fixed cover (4) and the rotating component (5) are movably engaged. The lower cover (3) is provided with a control structure (x). The vertical shaft of the fan (1) passes through the rotating component (5) and engages with the control structure (x). The control structure (x) consists of a worm motor (6), a worm wheel (7), a second pulley (8), a belt (9), a rotating movable component (10), a circuit board (11), and a first pulley (12). The rotating movable component (10), the first pulley (12), and the second pulley (8) are engaged by a belt (9). The first pulley (12) is mounted on the worm wheel (7). The worm wheel (7) engages with the worm motor (6). The rotating movable component (10) is provided with a circuit board (11) below it. The circuit board (11) is fixed with a circuit board metal electrode (13). The rotating movable component (10) includes a tray (101) with metal electrode plates (100). The rotation of the tray (101) causes the metal electrode sheet (100) to shift, resulting in a change in capacitance with the metal electrode (13) on the circuit board. A control logic is formed based on the change value. The circuit board (11) has a semi-circular opening, the center of which is concentric with the center of the tray (101), and the two metal electrodes (13) of the circuit board are at the same circumferential position on the circuit board (11). The distance between the metal electrode (13) of the circuit board and the center of the semi-circular opening is equal to the distance between the metal electrode sheet (100) and the center of the tray (101); The rotating movable component (10) further includes a sliding block (102), a connecting rod (103), a movable part (104), and a fixing plate (105). The tray (101) is provided with three sliding blocks (102). Each sliding block (102) is connected to the movable part (104) above the sliding block (102) through the connecting rod (103). A fixing plate (105) that cooperates with the tray (101) is provided between two adjacent sliding blocks (102). One end of the connecting rod (103) is connected to the movable part (104) through a rotating shaft, and the other end is rotatably connected to the sliding block (102). The expansion and contraction of the sliding block is adjusted by rotating the movable part (104). The sliding block (102) is provided with a belt groove that cooperates with the belt (9) for transmission; The second pulley (8) is also provided with a bracket (81), and the bracket (81) is provided with a spring (82), which can provide additional pressure when the belt is loose, so that the belt maintains a certain tension and ensures reliable transmission.

2. The rotation control mechanism according to claim 1, characterized in that: The outer wall of the movable part (104) is provided with an external thread, which is threadedly engaged with the rotating part (5).

3. The rotary control mechanism according to claim 1, characterized in that: The top surface of the tray (101) is integrally connected to a hollow ring (106), and the outer wall of the hollow ring (106) is integrally connected to a limiting plate (107) at three equal positions. An active opening is formed between two adjacent limiting plates (107) to cooperate with the sliding block (102).

4. A rotary control mechanism according to claim 3, characterized in that: The limiting plate (107) is provided with two uprights that are perpendicularly connected to the tray (101).

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