CROSS-REFERENCE TO RELATED APPLICATION

This non-provisional application claims priority under 35 U.S.C. § 119(a) to Patent Application No. 107119080 filed in Taiwan, R.O.C. on Jun. 1, 2018, the entire contents of which are hereby incorporated by reference.

BACKGROUND

Technical Field

The application generally relates to a rotary device. Specifically, the application relates to a rotary device having a limiting function.

Related Art

As use habits are diversified, current instruments or devices usually need reliable large-angle rotation control. However, limited by a structural design, an existing rotary device can usually achieve effective control only when a forward and reverse rotation angle is less than 180 degrees. When the rotary device intends to achieve angle control when the forward and reverse rotation angle is greater than 180 degrees, because the forward and reverse rotation has a corresponding overlapping location, the rotary device needs a more complex stopping mechanism, and mechanism interference is usually caused. Consequently, it is difficult to implement the angle control.

SUMMARY

An objective of the application is to provide a rotary device, which has a one-way limiting function, and can freely rotate reversely.

In an embodiment, a rotary device of the application includes a rotatable member and a limiting member, where the rotatable member is rotatably disposed on a base, the rotatable member includes a positioning mechanism, the positioning mechanism includes a stopping member and a positioning member, the stopping member includes a rotating shaft and a stopping portion, the positioning member is rotatably sleeved over the rotating shaft, and one side of the positioning member corresponds to the stopping portion; and the limiting member is fixed on the base, where the limiting member is configured to selectively stop the positioning member according to a rotation direction of the rotatable member; when the rotatable member rotates along a first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move away from the stopping portion and rotate relative to the stopping member, so that the positioning member passes through the limiting member; when the rotatable member rotates along a second rotation direction opposite to the first rotation direction to make the limiting member abut against the positioning member, the positioning member is pushed by the limiting member to move close to the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion, to position the rotatable member.

In an embodiment, the rotatable member includes a rotation body, the positioning mechanism further includes a supporting member, the supporting member is disposed on the rotation body and is connected to the stopping member, and the rotating shaft extends along a radial direction of the rotation body and is protruded from the supporting member.

In an embodiment, the positioning member includes a plate body portion and a shaft hole portion, the plate body portion is protruded from the shaft hole portion, the shaft hole portion is sleeved over the rotating shaft, and a part of the plate body portion corresponds to the stopping portion.

In an embodiment, the positioning member further includes a protruding rib, the protruding rib is disposed on the plate body portion, and the protruding rib is configured to separate an area corresponding to the stopping portion of the plate body portion from an area that does not correspond to the stopping portion of the plate body portion.

In an embodiment, the rotary device of the application further includes a movable ring and a blocking member, where the movable ring and the blocking member are disposed coaxial with the rotatable member, the rotatable member is connected to the movable ring and drives the movable ring to rotate, the blocking member is fixed on the base and is located on a rotation path of the movable ring, and when the movable ring rotates along the rotation path and abuts against the blocking member, the blocking member is configured to block the movable ring, to position the rotatable member

In an embodiment, the rotatable member further includes a shaft body portion and a protruding portion, the positioning mechanism and the protruding portion are disposed along an axial direction of the shaft body portion, and the protruding portion is located on the rotation path of the movable ring; the movable ring has a convex block, the convex block is disposed in a protruding manner along a part of a circumference of the movable ring; and when the rotatable member rotates, the protruding portion pushes the convex block of the movable ring, so that the movable ring rotates along the rotation path, until the protruding portion and the blocking member respectively abut against two opposite ends of the convex block.

In an embodiment, the limiting member includes a switching unit, when the rotatable member rotates along the second rotation direction opposite to the first rotation direction to make the limiting member abut against the positioning member, the switching unit is triggered.

Another objective of the application is to provide a rotary device, which has a two-way limiting function, and rotation angles of the directions may be greater than 180 degrees.

In another embodiment, a rotary device of the application includes a rotatable member and a limiting mechanism, where the rotatable member is rotatably disposed on a base, the rotatable member includes a first positioning mechanism and a second positioning mechanism, the first positioning mechanism includes a first stopping member and a first positioning member, the second positioning mechanism includes a second stopping member and a second positioning member, each of the first stopping member and the second stopping member includes a rotating shaft and a stopping portion, the first positioning member and the second positioning member are respectively rotatably sleeved over the rotating shafts, and the stopping portions are separately correspondingly disposed on one side of the first positioning member and the second positioning member; and the limiting mechanism is fixed on the base, where the limiting mechanism is configured to selectively stop the first positioning member or the second positioning member according to a rotation direction of the rotatable member, when the rotatable member rotates along a first rotation direction, the limiting mechanism allows the first positioning mechanism to pass through and the second positioning member is stopped between the limiting mechanism and the stopping portion of the second stopping member, to position the rotatable member; and when the rotatable member rotates along a second rotation direction opposite to the first rotation direction, the limiting mechanism allows the second positioning mechanism to pass through and the first positioning member is stopped between the limiting mechanism and the stopping portion of the first stopping member, to position the rotatable member.

In an embodiment, the first positioning member is rotatably sleeved over the rotating shaft of the first stopping member, the stopping portion of the first stopping member is correspondingly disposed on the side of the first positioning member, and when the rotatable member rotates along the first rotation direction, the limiting mechanism allows the first positioning mechanism to pass through, so that the first positioning member is pushed by the limiting mechanism to move away from the stopping portion of the first stopping member and rotate along a first direction relative to the first stopping member, so that the first positioning member passes through the limiting mechanism; and the second positioning member is rotatably sleeved over the rotating shaft of the second stopping member, the stopping portion of the second stopping member is correspondingly disposed on the side of the second positioning member, when the rotatable member rotates along the second rotation direction, the limiting mechanism allows the second positioning mechanism to pass through, so that the second positioning member is pushed by the limiting mechanism to move away from the stopping portion of the second stopping member and rotate along a second direction relative to the second stopping member, and the first direction is opposite to the second direction.

In an embodiment, the limiting mechanism includes a first limiting member and a second limiting member, the rotatable member includes a shaft body portion; the first positioning mechanism and the second positioning mechanism are disposed along an axial direction of the shaft body portion; and the first limiting member corresponds to the first positioning mechanism, to stop the first positioning mechanism and allow the second positioning mechanism to pass through, and the second limiting member corresponds to the second positioning mechanism, to stop the second positioning mechanism and allow the first positioning mechanism to pass through.

In an embodiment, the first limiting member includes a first switching unit, and the second limiting member includes a second switching unit; when the rotatable member rotates along the second rotation direction to make the first limiting member abut against the first positioning member, the first switching unit is triggered; and when the rotatable member rotates along the first rotation direction to make the second limiting member abut against the second positioning member, the second switching unit is triggered.

In an embodiment, each of the first positioning mechanism and the second positioning mechanism further includes a supporting member, the supporting members are disposed on a gear portion and are respectively connected to the first stopping member and the second stopping member, each of the first stopping member and the second stopping member includes a rotating shaft and a stopping portion, the first positioning member and the second positioning member are respectively rotatably sleeved over the rotating shafts, the stopping portions are separately correspondingly disposed on the side of the first positioning member and the second positioning member, and the rotating shafts are respectively protruded from the supporting members.

In an embodiment, each of the first positioning member and the second positioning member includes a plate body portion and a shaft hole portion, the plate body portion is protruded from the shaft hole portion, the shaft hole portion is sleeved over the rotating shaft, a part of the plate body portion corresponds to the corresponding stopping portion, and the shaft hole portion is connected to the plate body portion and is sleeved over the corresponding rotating shaft.

In an embodiment, at least one of the first positioning member and the second positioning member further includes a protruding rib, the protruding rib is disposed on the plate body portion, and the protruding rib is configured to separate an area corresponding to the first stopping portion or the second stopping portion of the plate body portion from an area that does not correspond to the first stopping portion or the second stopping portion of the plate body portion.

In an embodiment, the rotary device of the application further includes a driving gear, where the driving gear receives a power to rotate, the rotatable member includes a gear portion, the gear portion is engaged with the driving gear, and the driving gear drives the rotatable member to rotate.

Compared with existing technologies, according to the rotary device of the application, in cooperation with the positioning member and the stopping portion of the positioning mechanism, the limiting member provides a selective stopping function according to different rotation directions of the rotatable member, so that one-way positioning can be effectively achieved, and reverse free rotation can be achieved. Further, by using the limiting mechanism in cooperation with two one-way positioning mechanisms, the rotary device of the application not only can provide a selective stopping function according to different rotation directions of the rotatable member, but also can effectively achieve two-way positioning of greater than 180 degrees.

