Low-noise light fixture reset structure and control method thereof

1. A low-noise light fixture reset structure, comprising:

a pivot shaft; and

a pivot member rotatably connected to the pivot shaft, wherein

the pivot member has a first rotation direction and a second rotation direction that are opposite in direction relative to the pivot shaft, the pivot shaft is connected with a fixed drive wheel relative to the pivot shaft and is sleeved with a shifter lever that is capable of freely rotating relative to the pivot shaft;

a first detection marker is provided on the shifter lever, and a first detector configured to detect the first detection marker is correspondingly provided on the pivot member;

a first limiting post configured to limit the shifter lever is also provided on the drive wheel, the pivot member is further provided with an elastic member capable of resisting against the shifter lever and a second limiting post configured to limit the shifter lever, an resisting end of the elastic member and the second limiting post are respectively located on two sides of the first detector, the second limiting post, the first detector and the resisting end are sequentially provided in the first rotation direction, and the second limiting post, the elastic member and the first limiting post do not interfere with each other during a relative movement between the pivot member and the pivot shaft; and

when one side of the shifter lever is blocked by the first limiting post and the other side of the shifter lever squeezes the elastic member, the elastic member deforms to the second rotation direction to cause the first detector to detect the first detection marker on the shifter lever.

2. The low-noise light fixture reset structure according to claim 1 , wherein a second detection marker is provided on the drive wheel, and a second detector configured to detect the second detection marker is correspondingly provided on the pivot member.

3. The low-noise light fixture reset structure according to claim 2 , wherein on the pivot member, the second detector, the second limiting post, the first detector, and the resisting end are sequentially provided in the first rotation direction, and on the drive wheel, the second detection marker and the first limiting post are also sequentially provided in the first rotation direction.

4. The low-noise light fixture reset structure according to claim 2 , wherein the second detection marker is a magnet, the second detector is a magnetic sensitive switch, and/or the first detection marker is a magnet, and the first detector is a magnetic sensitive switch.

5. The low-noise light fixture reset structure according to claim 2 , wherein both the second detection marker and the second detector are located on one side of the drive wheel away from the shifter lever, and both the first detection marker and the first detector are located on one side of the shifter lever away from the drive wheel.

6. The low-noise light fixture reset structure according to claim 1 , wherein a minimum distance between the second limiting post and a center of the pivot shaft, and a minimum distance between the elastic member and the center of the pivot shaft are both greater than a maximum distance between the first limiting post and the center of the pivot shaft.

7. The low-noise light fixture reset structure according to claim 1 , wherein the second limiting post is not in contact with the shifter lever when the first detector detects the first detection marker.

8. The low-noise light fixture reset structure according to claim 1 , wherein the pivot shaft is fixed, and the pivot member self-rotates about the pivot shaft.

9. The low-noise light fixture reset structure according to claim 1 , wherein the pivot member is a support arm of a stage light fixture or a light head of a stage light fixture.

10. A control method of the low-noise light fixture reset structure according to claim 1 , comprising the steps of:

S1, driving the pivot member to rotate in the first rotation direction relative to the pivot shaft such that the resisting end of the elastic member pushes the shifter lever to rotate together until one side of the shifter lever is blocked by the first limiting post;

S2, continuing to drive the pivot member to rotate in the first rotation direction relative to the pivot shaft, the other side of the shifter lever resists against the resisting end to deform the elastic member to the second rotation direction, thereby causing the first detector to detect the first detection marker on the shifter lever and generate a first reset signal; and

S3, driving the pivot member to rotate in the second rotation direction relative to the pivot shaft, the resisting end of the elastic member resists against the shifter lever to remain motionless, and the first detector moving away from the first detection marker to complete a reset.

11. The control method according to claim 10 , wherein

a second detection marker is provided on the drive wheel, and a second detector that detects the second detection marker is correspondingly provided on the pivot member; and

in step S3, after the first detector is moved away from the first detection marker, the pivot member is continued to be driven to rotate in the second rotation direction relative to the pivot shaft until the second detector detects the second detection marker on the drive wheel, and then a second reset signal is generated to complete a reset.