Rotation stop structure

Abstract

The embodiment of the utility model discloses a rotation stopping structure which comprises a main shell, a first rotating piece and a second rotating piece, the first rotating piece and the second rotating piece are arranged on the inner side and the outer side of the main shell respectively, the second rotating piece and the first rotating piece can synchronously rotate relative to the main shell, and a stopping piece and an elastic reset piece are further arranged on the inner side of the main shell. The stop piece and the elastic reset piece are located on the two sides of the first rotating piece respectively, the first rotating piece is provided with at least one limiting block, the stop piece is provided with a limiting groove, and the second rotating piece drives the first rotating piece to synchronously rotate till the limiting block is clamped in the limiting groove and stops rotating. And meanwhile, the two ends of the elastic reset piece are connected with the first rotating piece and the main shell correspondingly, the first rotating piece and the second rotating piece can be driven to synchronously rotate and reset when the limiting block is separated from the limiting groove, the rotation stopping structure can be arranged in other equipment to assist in achieving the multi-angle rotation stopping function, and the practicability of the equipment is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical parts, in particular to a rotation stop structure. Background Art

[0002] The operation of many devices involves rotation. In practical applications, the angle range of many rotations needs to be limited and cannot be unlimited. This requires a rotation stop structure to limit the rotation. For example, the rotation of an automatic sweeper and the rotation of various camera support devices all require a rotation stop structure to achieve the rotation stop function. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a rotation stop structure that can be arranged in relevant equipment to assist in achieving the rotation stop function.

[0004] This embodiment provides a rotation stop structure, which includes:

[0005] main housing;

[0006] A first rotating member is arranged on the inner side of the main housing, and the first rotating member is provided with at least one limiting block;

[0007] A second rotating member is arranged outside the main housing, the second rotating member is fixedly connected to the first rotating member, and the second rotating member and the first rotating member rotate synchronously relative to the main housing;

[0008] A stopper is arranged inside the main housing and on one side of the first rotating member, and the stopper is provided with a limiting groove;

[0009] An elastic reset member is arranged inside the main housing and located on the other side of the first rotating member, and two ends of the elastic reset member are respectively connected to the first rotating member and the main housing;

[0010] Among them, the second rotating member drives the first rotating member to rotate synchronously until the limit block is engaged in the limit groove and stops rotating. When the limit block is separated from the limit groove, the elastic reset member drives the first rotating member and the second rotating member to rotate and reset synchronously.

[0011] Furthermore, the main shell is provided with a connecting through hole, the second rotating member includes a rotating shaft and a rotating bracket, one end of the rotating shaft is connected to the rotating bracket, and the other end of the rotating shaft is rotatably connected in the connecting through hole, and the first rotating member and the rotating shaft are fixedly connected by fasteners.

[0012] Furthermore, the first rotating member is provided with a connecting groove opening toward the main shell body and a first connecting hole connected with the connecting groove, a second connecting hole is provided inside the rotating shaft, the rotating shaft passes through the connecting through hole and extends into the connecting groove, and the fastener is connected in the first connecting hole and the second connecting hole.

[0013] Furthermore, a slot is provided on the outer side of the rotating shaft, an insert block is provided in the connecting groove, and the first rotating member and the second rotating member are plug-fitted with each other through the slot and the insert block.

[0014] Furthermore, the rotation stop structure also includes an engaging member, which is arranged in the second connecting hole, and a third connecting hole is arranged in the engaging member. The first connecting hole and the third connecting hole are both arranged as threaded holes, and the fastener passes through the first connecting hole and extends into the third connecting hole.

[0015] Furthermore, the outer surface of the engagement member is provided with forward engagement teeth and reverse engagement teeth.

[0016] Furthermore, the stop member is a spring sheet structure, both ends of the stop member are bent to form connecting parts connected to the main shell, and the middle part of the stop member is bent to form a limiting groove.

[0017] Furthermore, the limiting block is protrudingly arranged along the radial direction of the first rotating member.

[0018] Furthermore, a first fixing member is provided on the main shell, a second fixing member is provided on the first rotating member, one end of the elastic return member is connected to the first fixing member, and the other end of the elastic return member is connected to the second fixing member.

[0019] Furthermore, the first fixing member and the second fixing member are both configured to be hook-shaped, and hooks are respectively provided at both ends of the elastic reset member, and the hooks at both ends are respectively connected to the first fixing member and the second fixing member.

[0020] The embodiment of the utility model provides a rotation stop structure, which includes a main shell, and a first rotating member and a second rotating member respectively arranged on the inner and outer sides of the main shell, and the second rotating member and the first rotating member can rotate synchronously relative to the main shell, and a stop member and an elastic reset member are also arranged on the inner side of the main shell, and the stop member and the elastic reset member are respectively located on both sides of the first rotating member, and the first rotating member is provided with at least one limit block, and a limit groove is arranged on the stop member, and the second rotating member drives the first rotating member to rotate synchronously until the limit block is engaged in the limit groove and stops rotating, and at the same time, the two ends of the elastic reset member are respectively connected to the first rotating member and the main shell, and can drive the first rotating member and the second rotating member to rotate and reset synchronously when the limit block is separated from the limit groove. The rotation stop structure can be arranged in other equipment to assist in realizing the multi-angle rotation stop function, thereby effectively improving the practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0023] Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the first rotating member of the utility model embodiment Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the structure of the first rotating member of the utility model embodiment Figure 2 ;

[0026] Figure 5 It is a structural schematic diagram of the second rotating member of an embodiment of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the engagement member of an embodiment of the utility model;

[0028] Figure 7 It is a schematic structural diagram of a stop member according to an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 10-main shell; 11-connecting through hole; 12-first fixing member; 20-first rotating member; 21-limiting block; 22-second fixing member; 23-first connecting hole; 24-connecting groove; 241-insertion block; 25-installation groove; 30-second rotating member; 31-rotating axis; 311-second connecting hole; 312-slot; 32-rotating bracket; 40-stop member; 41-limiting groove; 42-connecting part; 50-elastic reset member; 51-hook; 60-fastener; 70-engaging member; 71-third connecting hole; 72-forward meshing teeth; 73-reverse meshing teeth. DETAILED DESCRIPTION

[0031] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present application without the description of these details. In order to avoid confusing the essence of the present application, known methods, processes, flows, components and circuits are not described in detail.

[0032] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0033] Unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0035] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0036] Figure 1 Schematic diagram of the overall structure of the rotation stop structure of the embodiment of the present application. Figure 1 The rotation stop structure of this embodiment includes a main housing 10, a first rotating member 20, a second rotating member 30, a stop member 40 and an elastic reset member 50. The first rotating member 20, the stop member 40 and the elastic reset member 50 are respectively arranged inside the main housing 10, and the second rotating member 30 is arranged outside the main housing 10, and the first rotating member 20 and the second rotating member 30 can rotate synchronously relative to the main housing 10. A limit block 21 is arranged on the first rotating member 20, and a limit groove 41 is arranged on the stop member 40. The first rotating member 20 and the second rotating member 30 rotate synchronously until the limit block 21 is engaged in the limit groove 41 and stops rotating to achieve rotation stop. The elastic reset member 50 can drive the first rotating member 20 and the second rotating member 30 to rotate synchronously to complete reset. The rotation stop structure can be installed and connected in a related device to assist the device to achieve the rotation stop function, such as being arranged in a camera support device to assist in adjusting the camera angle, or being arranged in an automatic sweeping robot to assist in controlling its rotation angle, etc.

[0037] Reference Figure 1The main housing 10 is a housing provided with a cavity, and the first rotating member 20, the stop member 40 and the elastic reset member 50 are all arranged inside the cavity of the main housing 10 to ensure that these parts can normally realize the rotation stop and reset functions without being affected by the outside world. The second rotating member 30 is arranged outside the main housing 10, and can be connected to the driving structure of the relevant equipment to realize the driving of the first rotating member 20 to rotate, or the second rotating member 30 is connected to other structures to assist the structure to realize the rotation stop function. It can be understood that the appearance of the main housing 10 can be changed specifically according to the relevant equipment connected.

[0038] Specifically, Figure 2 is a cross-sectional view of the overall structure of this embodiment, referring to Figure 2 The main housing 10 is provided with a connecting through hole 11, and the second rotating member 30 extends into the connecting through hole 11 and is connected to the first rotating member 20 through a fastener 60, so that the first rotating member 20 can achieve synchronous rotation with the second rotating member 30.

[0039] Figure 5 is a schematic diagram of the overall structure of the second rotating member 30 of this embodiment, referring to Figure 5 and Figure 2 The second rotating member 30 includes a rotating shaft 31 and a rotating bracket 32 ​​, and one end of the rotating shaft 31 is connected to the rotating bracket 32 ​​, and the other end is rotatably connected to the connecting through hole 11 . Figure 4 is a schematic diagram of the structure of the first rotating member 20 of this embodiment, referring to Figure 4 The first rotating member 20 is provided with a connecting groove 24 opening toward the main housing 10 and a first connecting hole 23 communicating with the connecting groove 24. Figure 1 and Figure 2 The notch of the connecting groove 24 abuts against the main housing 10, and the connecting groove 24 is coaxially connected with the connecting through hole 11. The rotating shaft 31 passes through the connecting through hole 11 and extends into the connecting groove 24, so that the first rotating member 20 can be fixedly connected to the rotating shaft 31 through the fastener 60. Figure 5 The rotating shaft 31 is provided with a second connecting hole 311, the second connecting hole 311 is coaxially connected with the first connecting hole 23, and the fastener 60 passes through the first connecting hole 23 and extends into the second connecting hole 311. The fastener 60 is connected in the first connecting hole 23 and the second connecting hole 311 to connect and fix the first rotating member 20 and the second rotating member 30, so that the first rotating member 20 and the second rotating member 30 can realize synchronous rotation relative to the main housing 10 with the rotating shaft 31 as the rotation center.

[0040] Optionally, the appearance of the rotating bracket 32 ​​can be changed and adjusted specifically according to the connected device.

[0041] Reference Figure 3-Figure 5The rotating shaft 31 is also provided with a slot 312, and an insert block 241 is provided in the connecting groove 24. The first rotating member 20 and the second rotating member 30 are further plugged and matched through the slot 312 and the insert block 241 to ensure the synchronization of the first rotating member 20 and the second rotating member 30. Figure 5 The rotating shaft 31 is symmetrically provided with a plurality of slots 312 along the circumferential direction. The slot opening direction of the slots 312 is perpendicular to the axial direction of the rotating shaft 31, and the slots 312 are also provided with lateral openings along the axial direction of the rotating shaft 31, so that when the rotating shaft 31 extends into the connecting slot 24, the slots 312 are plugged into and matched with the plug block 241, thereby providing transmission force for the synchronous rotation between the first rotating member 20 and the second rotating member 30, and avoiding the loosening of the connection between the first rotating member 20 and / or the second rotating member 30 and the fastener 60 due to multiple rotations.

[0042] Reference Figure 3 The first rotating member 20 is further provided with a mounting groove 25, which is communicated with the first connecting hole 23, and the notch direction of the mounting groove 25 is opposite to the notch direction of the connecting groove 24. The fastener 60 is provided as a screw, and the screw rod portion of the fastener 60 is connected with the first connecting hole 23 and the second connecting hole 311 in sequence from the mounting groove 25, so that the screw head portion of the fastener 60 abuts in the mounting groove 25, so that the connection depth when the fastener 60 is installed can be confirmed, and at the same time, the fastener 60 and the first rotating member 20 are prevented from loosening and falling off.

[0043] Optionally, the second connection hole 311 may be configured as a through hole, and the fastener 60 may extend from the second connection hole 311 into the first connection hole 23 for connection.

[0044] In another embodiment, the rotation stop structure further includes an engagement member 70. Figure 2 The engagement member 70 is disposed in the second connection hole 311, and the engagement member 70 is located between the rotating shaft 31 and the fastener 60, and the engagement member 70 and the rotating shaft 31 are in an interference fit to prevent loosening and falling off. The engagement member 70 is provided with a third connection hole 71, and the first connection hole 23 and the third connection hole 71 are both provided with threaded holes, and the fastener 60 is connected to the first connection hole 23 and the third connection hole 71 in sequence. Figure 6 The outer surface of the meshing member 70 is provided with forward meshing teeth 72 and reverse meshing teeth 73. The interference fit between the forward meshing teeth 72 and the reverse meshing teeth 73 and the rotating shaft 31 can prevent the first rotating member 20 from loosening with the fastener 60 during rotation and resetting.

[0045] Furthermore, the second rotating member 30 and the first rotating member 20 rotate synchronously until the limit block 21 is engaged in the limit groove 41 and then stops rotating, and can be reset by the elastic reset member 50. Figure 1At least one limit block 21 is provided on the first rotating member 20, and the stop member 40 is provided with a limit groove 41, and the stop member 40 is provided on one side of the first rotating member 20, and the limit block 21 can be engaged with the limit groove 41 when rotating with the first rotating member 20, so as to realize the rotation stop of the first rotating member 20 and the second rotating member 30. The elastic reset member 50 is provided on the other side of the first rotating member 20, and one end of the elastic reset member 50 is connected to the first rotating member 20, and the other end is connected to the main housing 10. The elastic reset member 50 is deformed with the rotation of the first rotating member 20, and provides elastic force for the first rotating member 20 after the limit block 21 is separated from the limit groove 41, so as to facilitate the reset of the first rotating member 20 and the second rotating member 30.

[0046] It should be noted that the “stop member 40 is located on one side of the first rotating member 20, and the elastic return member 50 is located on the other side of the first rotating member 20” means that the stop member 40 and the elastic return member 50 are located on different sides of the first rotating member 20, and does not specifically refer to the elastic return member 50 and the stop member 40 being arranged relative to each other.

[0047] Reference Figure 7 The stopper 40 is a spring structure, and the two ends of the stopper 40 are formed with connecting parts 42 connected to the main housing 10, and the middle part of the stopper 40 is bent to form a limiting groove 41. Figure 1 and Figure 7 The stopper 40 is an integrally formed structure, with two ends extending outward in parallel to form a connecting portion 42, one side of the connecting portion 42 extending outward and folding along the thickness direction of the stopper 40 to form an L-shape, the L-shaped connecting portion 41 overlaps with the boss provided on the inner side of the main housing 10, and one end of the L-shaped connecting portion 41 is fixedly connected to the main housing 10, so that the plane where the stopper 40 is located is perpendicular to the inner side of the main housing 10. The middle part of the stopper 40 is bent to form a wave-shaped limiting groove 41, the notch of the limiting groove 41 faces the position of the first rotating member 20, and the stopper 40 has a certain width so that the formed limiting groove 41 can accommodate the supporting limiting block 21. The stopper 40 is made of elastic materials such as stainless steel, manganese steel or spring steel, so that the limiting groove 41 is deformed when being squeezed by the limiting block 21, thereby realizing the clamping and disengagement between the limiting block 21 and the limiting groove 41. At the same time, the stop member 40 made of elastic material is more likely to deform when subjected to external force, thereby reducing the friction between the limit block 21 and the limit groove 41, effectively reducing the wear on the first rotating member 20, and increasing its rotation life, thereby ensuring the service life of the rotation stop structure.

[0048] Reference Figure 3 and Figure 4The limit block 21 on the first rotating member 20 is protrudingly arranged along the radial direction of the first rotating member 20. The limit block 21 is arranged on the outer side of the first rotating member 20 and moves with the rotation of the first rotating member 20, and the limit block 21 is engaged with the limit groove 41 when it moves to the position of the limit groove 41. Optionally, the limit block 21 can be formed into any limit shape such as square, circle, etc.

[0049] When the first rotating member 20 is not engaged with the stop member 40 and the first rotating member 20 and the second rotating member 30 are not affected by external force, the position is the starting position, and the angle passed by the first rotating member 20 and the second rotating member 30 when rotating from the starting position to the engagement of the limit block 21 with the limit groove 41 is the rotation angle. Figure 1 In the rotation stop structure of this embodiment, the first rotating member 20 is provided with two limit blocks 21, and the two limit blocks 21 are relatively arranged on both sides of the first rotating member 20. The stop member 40 and the elastic return member 50 are arranged in the direction of the center perpendicular line of the line connecting the limit blocks 21 on both sides, and the stop member 40 and the elastic return member 50 are relatively arranged on both sides of the first rotating member 20. The first rotating member 20 and the second rotating member 30 rotate with the rotating shaft 31 as the rotation center, and can realize clockwise rotation and counterclockwise rotation, and the rotation angle is 90°.

[0050] It can be understood that the first rotating member 20 and the second rotating member 30 can achieve different rotation angles through the relative positions between the limiting blocks 21 and the limiting grooves 41 and the number of the limiting blocks 21 .

[0051] Optionally, the first rotating member 20 can be set to other shapes such as circle, polygon, ellipse, etc., and the position shape of the limit block 21 can also be changed and adjusted with the shape of the first rotating member 20, so that the limit block 21 can cooperate with the limit groove 41 to achieve engagement and disengagement when the first rotating member 20 rotates.

[0052] Furthermore, after the limiting block 21 is engaged in the limiting groove 41 , the first rotating member 20 can continue to rotate to different rotation angles, or the elastic reset member 50 can drive the first rotating member 20 and the second rotating member 30 to rotate synchronously to achieve reset.

[0053] Reference Figure 1 The main housing 10 is provided with a first fixing member 12, the first rotating member 20 is provided with a second fixing member 22, one end of the elastic reset member 50 is connected to the first fixing member 12, and the other end is connected to the second fixing member 22. Figure 1 and Figure 2 The first fixing member 12 and the second fixing member 22 are both set to be hook-shaped, and hooks 51 are respectively provided at both ends of the elastic reset member 50, and the hooks 51 at both ends are respectively connected to the first fixing member 12 and the second fixing member 22, so as to facilitate the disassembly and replacement of the elastic reset member 50.

[0054] Reference Figure 1 , the first fixed member 12 is located on the first rotating member 20 at the farthest distance from the stop member 40, and the line between the first fixed member 12 and the second fixed member 22 is on the same straight line as the diameter of the first rotating member 20. When the first rotating member 20 and the second rotating member 30 are at the starting position, the elastic reset member 50 is in a stretched state, so that the elastic reset member 50 can generate a certain pulling force, thereby enabling the first rotating member 20 and the second rotating member 30 to maintain the starting position when not subject to external force. When the first rotating member 20 rotates, the elastic reset member 50 can be further stretched to generate a larger elastic force to generate a tendency to drive the first rotating member 20 to reset.

[0055] When the limit block 21 is engaged in the limit groove 41, a certain external force is applied to the first rotating member 20 or the second rotating member 30, so that the limit block 21 can be separated from the limit groove 41, and at the same time, the elastic reset member 50 provides elastic force for the first rotating member 20 and drives the first rotating member 20 and the second rotating member 30 to rotate synchronously in the direction opposite to the rotation angle. When an external force is applied to the first rotating member 20 or the second rotating member 30 in the same direction as the rotation angle, the elastic reset member 50 can drive the first rotating member 20 to rotate so that the limit block 21 is engaged in the limit groove 41, so as to avoid external collision causing the first rotating member 20 and the second rotating member 30 to reset. When an external force is applied to the first rotating member 20 or the second rotating member 30 in the direction opposite to the rotation angle, the elastic reset member 50 can drive the first rotating member 20 and the second rotating member 30 to rotate synchronously to the starting position to achieve reset.

[0056] The rotation stop structure of this embodiment realizes the rotation stop of the first rotating member and the second rotating member through the limiting groove of the stop member and the limiting block of the first rotating member, and can drive the first rotating member and the second rotating member to rotate and reset through the elastic reset member. At the same time, the stop member is set as a spring sheet structure using elastic material, and the resilience of the spring sheet structure is used to reduce the wear and damage between the first rotating member and the stop member, which effectively increases the rotation life of the first rotating member and improves the product quality of the rotation stop structure. The rotation stop structure can be set in other related equipment to assist the equipment in realizing the rotation stop function, thereby increasing the practicality of the equipment.

[0057] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotation stop structure, characterized in that: The rotation stop structure comprises: main housing (10); A first rotating member (20) is arranged on the inner side of the main housing (10), and the first rotating member (20) is provided with at least one limiting block (21); A second rotating member (30) is arranged outside the main housing (10), the second rotating member (30) and the first rotating member (20) are fixedly connected, and the second rotating member (30) and the first rotating member (20) rotate synchronously relative to the main housing (10); A stopper (40) is arranged inside the main housing (10) and located on one side of the first rotating member (20), and the stopper (40) is provided with a limiting groove (41); An elastic return member (50) is arranged inside the main housing (10) and located on the other side of the first rotating member (20), and two ends of the elastic return member (50) are respectively connected to the first rotating member (20) and the main housing (10); The second rotating member (30) drives the first rotating member (20) to rotate synchronously until the limit block (21) is engaged in the limit groove (41) and stops rotating; when the limit block (21) is separated from the limit groove (41), the elastic reset member (50) drives the first rotating member (20) and the second rotating member (30) to rotate synchronously and reset.

2. The rotation stop structure according to claim 1, characterized in that: The main housing (10) is provided with a connecting through hole (11); the second rotating member (30) comprises a rotating shaft (31) and a rotating bracket (32); one end of the rotating shaft (31) is connected to the rotating bracket (32); the other end of the rotating shaft (31) is rotatably connected in the connecting through hole (11); and the first rotating member (20) and the rotating shaft (31) are fixedly connected by a fastener (60).

3. The rotation stop structure according to claim 2, characterized in that: The first rotating member (20) is provided with a connecting groove (24) opening toward the main housing (10) and a first connecting hole (23) connected to the connecting groove (24); a second connecting hole (311) is provided inside the rotating shaft (31); the rotating shaft (31) passes through the connecting through hole (11) and extends into the connecting groove (24); and the fastener (60) is connected in the first connecting hole (23) and the second connecting hole (311).

4. The rotation stop structure according to claim 3, characterized in that: A slot (312) is provided on the outside of the rotating shaft (31), an insert block (241) is provided in the connecting groove (24), and the first rotating member (20) and the second rotating member (30) are plug-fitted through the slot (312) and the insert block (241).

5. The rotation stop structure according to claim 3, characterized in that: The rotation stop structure also includes an engaging member (70), the engaging member (70) is arranged in the second connecting hole (311), and a third connecting hole (71) is arranged in the engaging member (70), the first connecting hole (23) and the third connecting hole (71) are both arranged as threaded holes, and the fastener (60) passes through the first connecting hole (23) and extends into the third connecting hole (71).

6. The rotation stop structure according to claim 5, characterized in that: The outer surface of the meshing member (70) is provided with positive meshing teeth (72) and reverse meshing teeth (73).

7. The rotation stop structure according to any one of claims 1 to 6, characterized in that: The stop member (40) is a spring sheet structure, both ends of the stop member (40) are bent to form connecting portions (42) connected to the main housing (10), and the middle portion of the stop member (40) is bent to form the limiting groove (41).

8. The rotation stop structure according to claim 1, characterized in that: The limiting block (21) is arranged to protrude along the radial direction of the first rotating member (20).

9. The rotation stop structure according to claim 1, characterized in that: The main housing (10) is provided with a first fixing member (12), the first rotating member (20) is provided with a second fixing member (22), one end of the elastic return member (50) is connected to the first fixing member (12), and the other end of the elastic return member (50) is connected to the second fixing member (22).

10. The rotation stop structure according to claim 9, characterized in that: The first fixing member (12) and the second fixing member (22) are both arranged in a hook shape, and hooks (51) are respectively arranged at both ends of the elastic reset member (50), and the hooks (51) at both ends are respectively connected to the first fixing member (12) and the second fixing member (22).

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