Rotating structure and door

Abstract

The present invention discloses a rotating structure and a door. The rotating structure includes a seat, a rotating shaft and a first damping unit, the first damping unit is installed in the seat and is suitable for abutting against the first position of the cam when the rotating shaft stops at the first rotating position, and abutting against the second position of the cam when the rotating shaft stops at the second rotating position; the rotating structure also includes a second damping unit; the rotating shaft is also provided with a docking portion, the docking portion and the cam are distributed along the axial direction of the rotating shaft, and the docking portion is provided with a first abutting surface and a second abutting surface; the second damping unit is installed in the seat, and is suitable for abutting against the first abutting surface when the rotating shaft stops at the first rotating position, and abutting against the second abutting surface when the rotating shaft stops at the second rotating position. The rotating structure and door of the present invention can be stably docked.

Description

Technical Field

[0001] The present invention relates to the technical field of rotating doors, and in particular to a rotating structure and a door. Background Art

[0002] The door is often opened and closed by a rotating shaft fixed to the door. A cam is generally provided on the rotating shaft, and a damping unit is provided in the door frame. The damping unit cooperates with the cam to achieve the docking of the rotating shaft at different positions, thereby maintaining the door in an open or closed state. However, in the prior art, when the damping unit and the cam are in contact, they are often in line contact, and the rotating shaft is not stable enough when docked. The door may be closed after a slight impact in the open state, thereby causing inconvenience to the user. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a rotating structure and a door that can stably stop the rotating shaft.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] Technical solution 1, a rotation structure, including a seat body, a rotating shaft and a first damping unit, the rotating shaft rotates relative to the seat body and is axially limited with the seat body, the rotating shaft is suitable for stopping at a first rotation position or a second rotation position, and a cam is provided on the rotating shaft; the first damping unit is installed in the seat body and is suitable for abutting against a first position of the cam in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft stops at the first rotation position, and abutting against a second position of the cam in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft stops at the second rotation position; it also includes a second damping unit; the rotating shaft is also provided with a docking portion, the docking portion and the cam are distributed along the axial direction of the rotating shaft, and the docking portion is provided with a first top abutting surface and a second top abutting surface; the second damping unit is installed in the seat body, which is suitable for abutting against the first top abutting surface in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft stops at the first rotation position, and abutting against the second top abutting surface in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft stops at the second rotation position.

[0006] Based on technical solution one, technical solution two is also provided. In technical solution two, the first abutting surface and the second abutting surface are both straight surfaces parallel to the rotation axis of the rotating shaft, and the second damping unit is provided with a pushing surface for abutting the first abutting surface or the second abutting surface.

[0007] Based on technical solution two, technical solution three is also provided. In technical solution three, the cam is provided with a protrusion protruding relative to the first top abutment surface and a first abutment surface parallel to or located on the same plane as the second top abutment surface. The cam forms the first position and the first abutment surface forms the second position.

[0008] Based on Technical Solution Three, Technical Solution Four is also provided. In Technical Solution Four, the first rotation position and the second rotation position are 90°; the rotating shaft is also suitable for docking at the third rotation position, and the angle between the first rotation position and the third rotation position is 90°; the first damping unit is suitable for abutting against the third position of the cam in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft docks at the third rotation position, and the docking portion is also provided with a third abutting surface; the pushing surface of the second damping unit is suitable for abutting against the third abutting surface in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft docks at the third rotation position.

[0009] Based on technical solution four, technical solution five is also provided. In technical solution five, the third top abutment surface is a straight surface parallel to the rotation axis of the rotating shaft; the docking portion is provided with a second abutment surface parallel to or located in the same plane as the third top abutment surface, and the second abutment surface forms the third position of the cam.

[0010] Based on technical solution five, technical solution six is ​​also provided. In technical solution six, there are two stop portions, which are respectively located at the two ends of the axial direction of the cam.

[0011] Based on technical solution six, technical solution seven is also provided. In technical solution seven, the second damping unit includes a return spring and a first supporting member; the return spring is sleeved on the first damping unit, one end of which abuts the seat body, and the other end abuts the first supporting member; the pushing surface is formed on the first supporting member; the first supporting member is also provided with a first through hole perpendicular to the rotation axis of the rotating shaft; the first damping unit passes through the first through hole and abuts the first position, second position or third position of the cam.

[0012] Based on Technical Solution Seven, Technical Solution Eight is also provided. In Technical Solution Eight, the first supporting member is also provided with a second through hole connected to the first through hole, the rotating shaft passes through the second through hole and is axially limited relative to the first supporting member; the pushing surface is formed on the inner wall of the second through hole close to the first through hole.

[0013] Based on Technical Solution Eight, there is also provided Technical Solution Nine, which further includes a barrier member, which is placed between the first damping unit and the first through hole and is relatively fixed to the first supporting member, and the barrier member is made of plastic material.

[0014] Technical solution ten, a door, comprising a door frame, a door body and a rotating structure described in any one of technical solutions one to nine, wherein the seat body is fixedly connected to the door frame, and the door body is fixedly connected to the rotating shaft; when the rotating shaft stops at a first rotating position, the door body is closed; when the rotating shaft stops at a second rotating position, the door body is opened.

[0015] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the technical solution 1, a second damping unit is provided, a docking portion is provided on the rotating shaft, and a first abutting surface and a second abutting surface are provided on the docking portion. When the rotating shaft is docked at the first rotation position, the first damping unit abuts against the first position of the cam, and the second damping unit abuts against the first abutting surface of the docking portion; when the rotating shaft is docked at the second rotation position, the first damping unit abuts against the second position of the cam, and the second damping unit abuts against the second abutting surface of the docking portion. With the technical solution, when the rotating shaft is docked, the rotating shaft is abutted by the first damping unit and the second damping unit at the same time, and the rotating shaft is more stable when docked and is not easy to shake.

[0017] 2. In the second technical solution, the first abutment surface and the second abutment surface are both straight surfaces parallel to the rotation axis of the rotating shaft, and the second damping unit is provided with a pushing surface for abutting the first abutment surface or the second abutment surface, that is, the second damping unit is in surface contact with the docking portion, which further makes the rotating shaft more stable when the rotating shaft is docked; and such a setting also makes the production and processing of the rotating shaft simpler.

[0018] 3. In technical solution three, the structure of the cam is such that when the rotating shaft stops at the first rotation position, the rotating shaft cooperates with the first damping unit and the second damping unit to form a snap-fit ​​structure; when the rotating shaft stops at the second rotation position, the rotating shaft cooperates with the first damping unit and the second damping unit to form a snap-fit ​​structure or a tight abutment relationship, thereby making the rotating shaft more stable when stopped.

[0019] 4. In technical solution four, the rotating shaft can also stop at the third rotation position. The angles between the first rotation position, the second rotation position and the third rotation position are all 90°. That is, when the rotating shaft stops at the first rotation position, if the rotating shaft is fixed to the door body, the door body can be opened by rotating clockwise or counterclockwise, which is more widely used. When the rotating shaft stops at the third rotation position, the rotating shaft is pushed against by the first damping unit and the second damping unit at the same time, so it is more stable when stopped and not easy to shake.

[0020] 5. In technical solution five, when the rotating shaft stops at the third rotation position, the rotating shaft cooperates with the first damping unit and the second damping unit to form a snap-fit ​​structure or a tight abutment relationship, thereby making the rotating shaft more stable when stopped.

[0021] 6. In technical solution six, there are two docking parts, which are respectively located at the two ends of the axial direction of the cam, increasing the contact area between the second damping unit and the rotating shaft, thereby making the docking of the rotating shaft more stable.

[0022] 7. In technical solution seven, the structure is simple, practical and easy to implement, and makes the production and processing of each component simpler.

[0023] 8. In technical solution eight, the rotating shaft passes through the second through hole of the first top holding member and is axially limited relative to the first top holding member. The rotating shaft rotates in the first top holding member. The installation of the entire rotating structure is simpler, and the rotating shaft is not easy to move in a direction perpendicular to its rotation axis.

[0024] 9. In technical solution nine, a baffle is provided to reduce the friction between the first damping unit and the first through hole, so that the rotating shaft rotates more smoothly.

[0025] 10. In technical solution 10, due to the adoption of the above-mentioned rotation structure, the door can be stably docked at the first rotation position or the second rotation position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a partial three-dimensional exploded view of an embodiment of the present invention;

[0028] Figure 2 A three-dimensional schematic diagram of the rotating shaft of an embodiment of the invention Figure 1 ;

[0029] Figure 3 A three-dimensional schematic diagram of a rotating shaft according to an embodiment of the present invention Figure 2 ;

[0030] Figure 4 A partial cross-sectional view of a rotating shaft of an embodiment of the present invention parked at a first rotating position;

[0031] Figure 5 It is a partial cross-sectional view of the rotating shaft of the embodiment of the present invention parked at the second rotating position;

[0032] Figure 6 It is a partial cross-sectional view of the rotating shaft of the embodiment of the present invention parked at the third rotating position.

[0033] Description of main reference numerals:

[0034] Base body 10; baffle 11; damping chamber 12; rotating shaft 20; cam 21; protrusion 211; first abutting surface 212; second abutting surface 213; stopping portion 22; first top abutting surface 221; second top abutting surface 222; third top abutting surface 223; first supporting surface 23; second supporting surface 24; first damping unit 30; linkage rod 31; second top holding member 32; second damping unit 40; return spring 41; first top holding member 42; first through hole 421; second through hole 422; push-up surface 423; first limiting surface 424; second limiting surface 425; barrier member 50. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0037] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0038] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0039] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0040] See also Figure 1-6 , Figure 1-6A rotating structure is shown, including a seat body 10, a rotating shaft 20, a first damping unit 30, a second damping unit 40 and a barrier 50. The rotating shaft 20 rotates relative to the seat body 10 and is axially limited with the seat body 10. The first damping unit 30 and the second damping unit 40 are both installed on the seat body 10 and are used to press against the rotating shaft 20 so that the rotating shaft 20 is suitable for stopping at the first rotating position, the second rotating position or the third rotating position. The angles between the first rotating position and the second rotating position and the third rotating position are all 90°. The barrier 50 is used to reduce the friction of the first damping unit 30.

[0041] A baffle 11 and a damping chamber 12 located on one side of the baffle 11 are disposed in the base body 10 , and the other side of the baffle 11 faces the rotating shaft 20 .

[0042] like Figure 2-3 As shown, specifically, the rotating shaft 20 is provided with two parallel and oppositely arranged first supporting surfaces 23 and second supporting surfaces 24, the first supporting surfaces 23 and the second supporting surfaces 24 are both perpendicular to the rotating axis of the rotating shaft 20, and the rotating shaft 20 is also provided with a cam 21 and two stop portions 22 located between the first supporting surface 23 and the second supporting surface 24. The cam 21 and the two stop portions 22 are distributed along the axial direction of the rotating shaft 20, and the two stop portions 22 are respectively located at the two ends of the axial direction of the cam 21. The cam 21 is provided with a first position, a second position and a third position, and correspondingly, the stop portion 22 is provided with a first top abutting surface 221, a second top abutting surface 222 and a third top abutting surface 223. Among them, the first supporting surface 23 and the second supporting surface 24 are both connected to the first top abutting surface 221, the second top abutting surface 222 and the third top abutting surface 223.

[0043] In a specific implementation, the first top abutting surface 221, the second top abutting surface 222 and the third top abutting surface 223 are all flat surfaces parallel to the rotation axis of the rotating shaft 20. The cam 21 is provided with a protrusion 211 protruding relative to the first top abutting surface 221, a first abutting surface 212 parallel to or located on the same plane as the second top abutting surface 222, and a second abutting surface 213 parallel to or located on the same plane as the third top abutting surface 223. In this embodiment, the cam 21 is provided with a first groove recessed relative to the second top abutting surface 222, and a second groove recessed relative to the third top abutting surface 223. The groove bottom of the first groove forms the first abutting surface 212, and the groove bottom of the second groove forms the second abutting surface 213, that is, the first abutting surface 212 is parallel to the second top abutting surface 222, and the second abutting surface 213 is parallel to the third top abutting surface 223. The protrusion 211 forms the first position of the cam 21, the first abutting surface 212 forms the second position of the cam 21, and the second abutting surface 213 forms the third position of the cam 21. In this embodiment, the protrusion 211 is an equilateral triangle, but it should be understood that the protrusion 211 can also be other shapes, which will not be described in detail in the present invention.

[0044] like Figure 4-6As shown, the first damping unit 30 is suitable for abutting against the first position of the cam 21 along the direction perpendicular to the rotation axis of the rotating shaft 20 when the rotating shaft 20 stops at the first rotation position, abutting against the second position of the cam 21 along the direction perpendicular to the rotation axis of the rotating shaft 20 when the rotating shaft 20 stops at the second rotation position, and abutting against the third position of the cam 21 along the direction perpendicular to the rotation axis of the rotating shaft 20 when the rotating shaft 20 stops at the third rotation position.

[0045] Specifically, the structure of the first damping unit 30 is substantially the same as that of the prior art, and includes a linkage rod 31 and a second supporting member 32. One end of the linkage rod 31 passes through the baffle 11 and is placed in the damping chamber 12, and the other end abuts against the second supporting member 32. The second supporting member 32 is used to abut against the first position, the second position or the third position of the cam 21, that is, the protrusion 211, the first abutting surface 212 or the second abutting surface 213. It can be seen that the two ends of the first damping unit 30 are respectively acted upon by the damping chamber 12 and the cam 21, and are thereby pushed to move along the direction of the rotation axis perpendicular to the rotation axis of the rotating shaft 20. It should be understood that the linkage rod 31 and the second supporting member 32 can also be connected as one.

[0046] like Figure 4-6 As shown, the second damping unit 40 is suitable for abutting the first abutting surface 221 in a direction perpendicular to the rotation axis of the rotating shaft 20 when the rotating shaft 20 stops at the first rotation position, abutting the second abutting surface 222 in a direction perpendicular to the rotation axis of the rotating shaft 20 when the rotating shaft 20 stops at the second rotation position, and abutting the third abutting surface 223 in a direction perpendicular to the rotation axis of the rotating shaft 20 when the rotating shaft 20 stops at the third rotation position.

[0047] The second damping unit 40 includes a return spring 41 and a first support member 42. The return spring 41 is sleeved on the first damping unit 30, one end of which abuts against the seat body 10, and the other end abuts against the first support member 42. Specifically, the return spring 41 is sleeved on the linkage rod 31, one end of the return spring 41 abuts against the baffle 11, and the other end abuts against the first support member 42. The first support member 42 is provided with a push surface 423 for abutting against the first abutting surface 221, the second abutting surface 222 or the third abutting surface 223. It can be seen that the two ends of the second damping unit 40 are respectively acted by the baffle 11 and the cam 21, and the two ends of the first support member 42 are respectively acted by the return spring 41 and the cam 21, so that it is pushed to move along the direction of the rotation axis perpendicular to the rotation axis of the rotation shaft 20.

[0048] The first supporting member 42 is provided with a first through hole 421 perpendicular to the rotation axis of the rotating shaft 20 and a second through hole 422 connected to the first through hole 421. The first through hole 421 is suitable for the first damping unit 30 to pass through. In this embodiment, the first through hole 421 is mainly suitable for the second supporting member 32 to pass through. The second through hole 422 is suitable for the rotating shaft 20 to pass through, and the rotating shaft 20 is also axially limited relative to the first supporting member 42. In this way, the second supporting member 32 can abut against the first position, the second position or the third position of the cam 21 after passing through the first through hole 421. The inner wall of the second through hole 422 close to the first through hole 421 forms a push-up surface 423 for abutting against the first push-up surface 221, the second push-up surface 222 or the third push-up surface 223. In this embodiment, the push-up surface 423 is also a straight surface parallel to the rotation axis of the rotating shaft 20.

[0049] In order to reduce the friction force when the second supporting member 32 moves, the barrier member 50 is made of plastic material, and is located between the first damping unit 30 and the first through hole 421 and fixed relative to the first supporting member 42. There are many implementation methods for fixing the barrier member 50 and the first supporting member 42. In this embodiment, the barrier member 50 is placed between the return spring 41 and the first supporting member 42 to achieve fixation with the first supporting member 42 along the direction perpendicular to the rotation axis of the rotating shaft 20. The barrier member 50 is also placed between the second supporting member 32 and the first through hole 421 to achieve fixation along the rotation axis of the rotating shaft 20.

[0050] There are many ways to implement the axial limitation of the rotating shaft 20 relative to the first supporting member 42. In the present embodiment, the first supporting member 42 is provided with a first limiting surface 424 and a second limiting surface 425 which are perpendicular to the axis of the rotating shaft 20 and face away from each other, and the first supporting surface 23 and the second supporting surface 24 cooperate with the first limiting surface 424 and the second limiting surface 425 respectively.

[0051] Here’s how it works:

[0052] When the rotating shaft 20 stops at the first rotation position, the second supporting member 32 of the first damping unit 30 presses against the protrusion 211 of the cam 21 under the action of the damping chamber 12, and the pushing surface 423 of the first supporting member 42 presses against the first pushing surface 221 of the stopping portion 22 under the action of the return spring 41. The rotating shaft 20 is acted upon by the second supporting member 32 and the first supporting member 42, and the pushing surface 423 is in surface contact with the first pushing surface 221. The first supporting member 42, the second supporting member 32 and the rotating shaft 20 cooperate to form a clamping structure, and the rotating shaft 20 is stably parked at the first rotation position.

[0053] When the rotating shaft 20 stops at the second rotation position, the second supporting member 32 of the first damping unit 30 presses against the first abutting surface 212 of the cam 21 under the action of the damping chamber 12, and the pushing surface 423 of the first supporting member 42 presses against the second abutting surface 222 of the stopping portion 22 under the action of the return spring 41. The rotating shaft 20 is acted upon by the second supporting member 32 and the first supporting member 42, and the pushing surface 423 is in surface contact with the second abutting surface 222. The first supporting member 42, the second supporting member 32 and the rotating shaft 20 cooperate to form a clamping structure, and the rotating shaft 20 is stably parked at the second rotation position.

[0054] When the rotating shaft 20 stops at the third rotation position, the second supporting member 32 of the first damping unit 30 presses against the second abutting surface 213 of the cam 21 under the action of the damping chamber 12, and the pushing surface 423 of the first supporting member 42 presses against the third abutting surface 223 of the stopping portion 22 under the action of the return spring 41. The rotating shaft 20 is acted upon by the second supporting member 32 and the first supporting member 42, and the pushing surface 423 is in surface contact with the third abutting surface 223. The first supporting member 42, the second supporting member 32 and the rotating shaft 20 cooperate to form a clamping structure, and the rotating shaft 20 is stably parked at the third rotation position.

[0055] It can be known that when the rotating shaft 20 is parked at the above three positions, it can cooperate with the first supporting member 42 and the second supporting member 32 to form a stable clamping structure.

[0056] By adopting the present technical solution, due to the provision of the blocking member 50, the friction force of the second supporting member 32 is smaller when it moves in the axial direction perpendicular to the rotating shaft 20, that is, the resistance of the rotating shaft 20 when it rotates is smaller, so that the rotation is smoother; the rotating shaft 20 passes through the first supporting member 42, so that the rotating shaft 20 is not easy to move in the direction perpendicular to its rotating axis; and both the structure of the rotating shaft 20 and the structure of the first damping unit 30 or the second damping unit 40 are relatively simple and easy to implement, and the production and processing are also simpler.

[0057] Another notable feature of the present technical solution is that when the rotating shaft 20 stops at the first rotation position, it can rotate counterclockwise or clockwise, and thus stop at the second rotation position or the third rotation position. This also means that when the rotating shaft 20 is fixed to the door body, the door body can rotate clockwise or counterclockwise.

[0058] The present invention also provides a door, comprising a door frame, a door body and the rotating structure in the above embodiment, wherein the base body 10 is fixedly connected to the door frame, and the door body is fixedly connected to the rotating shaft 20; when the rotating shaft 20 is parked at the first rotating position, the door body is closed; when the rotating shaft 20 is parked at the second rotating position or the third rotating position, the door body is opened. In practical applications, if the door body opens outward when the rotating shaft 20 is parked at the second rotating position, the door body opens inward when the rotating shaft 20 is parked at the third rotating position, and vice versa.

[0059] The door of the present invention adopts the rotating structure in the above embodiment, so the door body can be stably parked at the first rotating position, the second rotating position or the third rotating position, and the door body can be opened outward or inward in the closed state.

[0060] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A rotating structure, comprising a seat, a rotating shaft and a first damping unit, wherein the rotating shaft rotates relative to the seat and is axially limited with the seat, the rotating shaft is suitable for stopping at a first rotating position or a second rotating position, and a cam is provided on the rotating shaft; the first damping unit is installed in the seat and is suitable for abutting against a first position of the cam in a direction perpendicular to the rotating axis of the rotating shaft when the rotating shaft stops at the first rotating position, and abutting against a second position of the cam in a direction perpendicular to the rotating axis of the rotating shaft when the rotating shaft stops at the second rotating position; wherein the first damping unit is installed in the seat and is suitable for abutting against a first position of the cam in a direction perpendicular to the rotating axis of the rotating shaft when the rotating shaft stops at the second rotating position; wherein the first damping unit is suitable for abutting against a second position of the cam in a direction perpendicular to the rotating axis of the rotating shaft when the rotating shaft stops at the second rotating position; Also comprising a second damping unit; The rotating shaft is also provided with a resting portion, the resting portion and the cam are distributed along the axial direction of the rotating shaft, and the resting portion is provided with a first top abutting surface and a second top abutting surface; The second damping unit is installed in the seat body, and is suitable for abutting against the first abutting surface in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft stops at the first rotation position, and abutting against the second abutting surface in a direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft stops at the second rotation position; The second damping unit includes a return spring and a first supporting member; the return spring is sleeved on the first damping unit, one end of which abuts against the seat body, and the other end abuts against the first supporting member; the first supporting member is also provided with a first through hole perpendicular to the rotation axis of the rotating shaft; the first damping unit passes through the first through hole and abuts against the first position or the second position of the cam; the second damping unit is provided with a pushing surface for abutting against the first abutting surface or the second abutting surface; the pushing surface is formed on the first supporting member.

2. A rotating structure according to claim 1, characterized in that: The first abutting surface and the second abutting surface are both flat surfaces parallel to the rotation axis of the rotation shaft.

3. A rotating structure as claimed in claim 2, characterized in that: The cam is provided with a convex block protruding relative to the first top abutting surface and a first abutting surface parallel to or located on the same plane as the second top abutting surface. The cam forms the first position, and the first abutting surface forms the second position.

4. A rotating structure as claimed in claim 3, characterized in that: The angle between the first rotation position and the second rotation position is 90°; the rotating shaft is also suitable for docking at the third rotation position, and the angle between the first rotation position and the third rotation position is 90°; the first damping unit is suitable for penetrating the first through hole along the direction perpendicular to the rotation axis of the rotating shaft to abut against the third position of the cam when the rotating shaft docks at the third rotation position, and the docking portion is also provided with a third abutting surface; the pushing surface of the second damping unit is suitable for abutting against the third abutting surface along the direction perpendicular to the rotation axis of the rotating shaft when the rotating shaft docks at the third rotation position.

5. A rotating structure according to claim 4, characterized in that: The third abutment surface is a straight surface parallel to the rotation axis of the rotation shaft; the stop portion is provided with a second abutment surface parallel to or located in the same plane as the third abutment surface, and the second abutment surface forms the third position of the cam.

6. A rotating structure according to claim 5, characterized in that: There are two stop portions, which are respectively located at two ends of the axial direction of the cam.

7. A rotating structure according to claim 6, characterized in that: The first supporting member is further provided with a second through hole communicating with the first through hole, the rotating shaft passes through the second through hole and is axially limited relative to the first supporting member; the pushing surface is formed on the inner wall of the second through hole close to the first through hole.

8. A rotating structure according to claim 7, characterized in that: It also includes a barrier member, which is placed between the first damping unit and the first through hole and fixed relatively to the first supporting member, and is made of plastic material.

9. A door, characterized in that: It comprises a door frame, a door body and a rotating structure as described in any one of claims 1-8, wherein the seat body is fixedly connected to the door frame, and the door body is fixedly connected to the rotating shaft; when the rotating shaft stops at a first rotating position, the door body is closed; when the rotating shaft stops at a second rotating position, the door body is opened.

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