Swing centering mechanism and fan

Abstract

The utility model discloses a swing centering mechanism and a fan, and the swing centering mechanism comprises a rotating shaft which is driven by a motor to rotate; the number of the photoelectric switches is at least two, the photoelectric switches are arranged on a PCB, and a point between the at least two photoelectric switches is a central point; and the switch separation blade is connected with the rotating shaft and is used for swinging under the driving of the rotating shaft, the switch separation blade can shield any photoelectric switch when swinging, and the switch separation blade can be positioned between the at least two photoelectric switches without shielding when swinging. According to the utility model, the central point of the mechanism is determined based on the at least two photoelectric switches, so that when the central point is determined, the moving switch separation blade is not contacted with the bracket, the structural damage is not caused, and the precision is high.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a swing centering mechanism and a fan. Background Art

[0002] In the prior art, products such as fans are generally driven by a stepping motor to swing the rotating shaft back and forth to realize oscillating air supply; such fans need to find the center point of the product first when starting up, and then swing according to the set angle. Specifically, the swing of such fan products is also subdivided into multiple gears, and each gear setting swings back and forth with the center as the "0" point and equal left and right angles; in use, when the product shuts down or stops, it will stop on either side of the product, and each time it starts, the rotating shaft needs to find the center "0" point of the product as the swing center point and swing according to the set gear angle; when starting up, the rotating shaft will rotate to one side, and when finding the center point, it may hit one side of the product limit. Due to the impact on the mechanism, it will cause certain damage or destruction to the mechanism parts, and in addition, the found center point is not accurate. Summary of the Utility Model

[0003] In view of the above technical problems, the utility model provides a swing centering mechanism and a fan to solve the problems of easy damage and low accuracy when the existing fan finds the swing center point.

[0004] Other features and advantages of the present disclosure will become apparent from the following detailed description, or be learned in part through the practice of the present disclosure.

[0005] According to one aspect of the utility model, a swing centering mechanism is disclosed, which is characterized by comprising:

[0006] A rotating shaft driven by a motor to rotate;

[0007] Photoelectric switches, at least two of which are arranged on a PCB board, and the center point of the mechanism is located between at least two of the photoelectric switches;

[0008] A switch flap connected to the rotating shaft, which is used to swing under the drive of the rotating shaft. The switch flap can block any one of the photoelectric switches when swinging, and can be located between at least two of the photoelectric switches without forming a block when swinging.

[0009] Further, the switch flap forms a symmetrical structure.

[0010] Further, a limiting plate for limiting the swinging stroke of the switch flap is arranged on the bracket.

[0011] Further, the PCB board is used to determine that the rotating shaft has rotated to the center point when at least two of the photoelectric switches are not blocked by the switch flap.

[0012] According to another aspect of the present utility model, there is provided a fan, and the fan includes the swing centering mechanism as described above.

[0013] Adopting the above solution, the beneficial effects of the present utility model are as follows:

[0014] Based on at least two photoelectric switches to determine the center point of the mechanism. In this way, when determining the center point, the moving switch flap has no contact with the bracket, so no structural damage will be caused and the accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the swing centering mechanism of the present utility model;

[0016] Figure 2 is a top view structural diagram of the swing centering mechanism of the present utility model;

[0017] Figure 3 is another top view structural diagram of the swing centering mechanism of the present utility model;

[0018] Figure 4 is yet another top view structural diagram of the swing centering mechanism of the present utility model;

[0019] Figure 5 is a schematic structural diagram of the fan of the present utility model.

[0020] Reference numerals:

[0021] 1, rotating shaft; 2, motor; 3, photoelectric switch; 4, PCB board; 5, switch flap; 6, bracket; 7, limiting plate; 211, front cover; 212, fan blade; 213, rear cover; 22, bracket seat; 231, connecting arm; 232, clamping body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Referring to Figure 1 as shown, the present utility model provides a swing centering mechanism, including: a rotating shaft 1, the rotating shaft 1 is driven by a motor 2 to rotate; photoelectric switches 3, there are at least two photoelectric switches 3, which are arranged on a PCB board 4, and the center point of the mechanism is located between at least two photoelectric switches 3; a switch flap 5, the switch flap is connected to the rotating shaft 1, and is used to perform a swing movement driven by the rotating shaft 1. The switch flap 5 can block any one of the photoelectric switches 3 during the swing, and can be located between at least two photoelectric switches 3 without blocking during the swing.

[0024] Among them, the photoelectric switch 3 can be directly or indirectly mounted on the bracket 6, such as being mounted through the PCB board 4. The number of them can be 2, 4, 6, etc. To achieve the basic function, 2 are required; the switch flap 5 is passed through by the rotating shaft 1; during use, the photoelectric switch 3 and the switch flap 5 cooperate with each other. When the switch flap 5 blocks the photoelectric switch 3, the photoelectric switch 3 will sense it; the width of the switch flap 5 should be slightly smaller than the distance between the two photoelectric switches 3. When the switch flap 5 is located between the two photoelectric switches 3, it means that at this time neither of the photoelectric switches 3 can sense the switch flap 5, that is, both of the two photoelectric switches 3 are turned on, and this position can be confirmed as the center point. The PCB board 4 can determine that the rotating shaft 1 has rotated to the center point when at least two photoelectric switches 3 are not blocked by the switch flap. During this process, the rotating shaft 1 does not hit any mechanical components, playing a good role in protecting the mechanism.

[0025] Combined with Figures 2-4 To explain the mechanism of the present utility model, the switch flap 5, the bracket 6, the PCB board 4, etc. can form a symmetrical structure. On the one hand, it can reduce the unbalanced eccentric movement of the rotating shaft 1, and on the other hand, it makes the center point easier to confirm, such as the exact middle of the two switch flaps 5. To prevent possible displacement deviation of the switch flap 5, a limiting plate 7 for limiting the swinging stroke of the switch flap 5 is provided on the bracket 6. As Figure 2 shown, when the switch flap 5 is located between the two photoelectric switches 3, neither of the two photoelectric switches 3 is blocked by the switch flap 5, and the PCB board 4 can confirm the position of the center point, that is, the rotating shaft 1 has rotated to the center point; when as Figure 3 , 4 any one of the photoelectric switches 3 is blocked, it means that it is not at the center point at this time.

[0026] In addition, different from the conventional usage of the photoelectric switch 3 in the prior art, the present utility model jointly confirms the center point through two photoelectric switches 3. In the prior art, when it is necessary to confirm a certain point through the photoelectric switch 3, a flap is used to block the photoelectric switch 3. If the flap is too wide, there will be a defect of large error, and if the flap is too narrow, it may not be able to block the photoelectric switch 3. The present utility model uses at least two photoelectric switches 3 in combination, which is not limited by the physical width of the switch flap 5 and has higher positioning accuracy.

[0027] The above-mentioned swing centering mechanism can be applied to a fan to confirm the center point when the fan swings. The fan can specifically be as Figure 5As shown in the figure, it includes an air outlet component, a swinging component, and a clamping component. The air outlet component includes a cover body, a fan blade 212 arranged in the cover body, and a driving motor arranged in the cover body for driving the fan blade 212 to rotate. The cover body includes a front cover 211 and a rear cover 213; the swinging component includes the swing centering mechanism as described above, a motor 2 for driving the swing centering mechanism to rotate, and a bracket 6 connecting the swing centering mechanism and the air outlet component; a bracket seat 22 connected to the bracket 6; the clamping component includes an elastic connecting arm 231 with one end hinged to the bracket seat 22, and a clamping body 232 rotatably connected to the other end of the connecting arm 231.

[0028] When the motor 2 drives the rotating shaft 1 to rotate, since the rotating shaft 1 is fixed to the bracket 6, the bracket 6 will rotate, thereby driving the entire air outlet component to rotate, realizing the head shaking function. Then, in cooperation with the above-mentioned swing centering mechanism, the center point of the positioning fan's head shaking can be displayed.

[0029] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A swing centering mechanism, characterized in that, The mechanism includes: a rotating shaft driven by a motor to rotate; photoelectric switches, with at least two of them disposed on a PCB board, and the center point of the mechanism is located between at least two of the photoelectric switches; a switch flap connected to the rotating shaft, which is used to swing under the drive of the rotating shaft. The switch flap can block any one of the photoelectric switches during swinging, and can be located between at least two of the photoelectric switches without forming a block during swinging.

2. The swing centering mechanism according to claim 1, characterized in that, The switch flap forms a symmetric structure.

3. The swing centering mechanism according to claim 1, characterized in that, The PCB board is mounted on a bracket, and a limiting plate for limiting the swinging stroke of the switch flap is provided on the bracket.

4. The swing centering mechanism according to claim 1, wherein The PCB board is used to determine that the rotating shaft has rotated to the center point when at least two of the photoelectric switches are not blocked by the switch flap at the same time.

5. A fan, characterized in that, The fan includes the swing centering mechanism according to any one of claims 1-4.

Images