Single-swing-arm rotating shaft device

Abstract

The utility model discloses a rotating shaft device with a single swing arm. The rotating shaft device comprises a fixed seat, the rotating shaft is rotatably assembled on the fixed seat, and a damping structure is arranged between the rotating shaft and the fixed seat; the first fixing piece is assembled on the rotating shaft; the telescopic piece is arranged on the fixed seat, and one end of the telescopic piece is connected with one end of the rotating shaft; and the telescopic piece provides an acting force for driving the rotating shaft to rotate reversely. Through the rotating shaft and the damping structure, damping exists when the displayer on the first fixing piece rotates forwards, and assistance is provided for reverse rotation of the displayer through the telescopic piece.

Description

Technical Field

[0001] The utility model relates to the technical field of sound, in particular to a single swing arm rotating shaft device. Background Art

[0002] Traditional audio systems, as audio playback systems or devices, convert electrical signals into sound to provide a high-quality auditory experience, while video playback requires users to carry an additional display device. Currently, audio machines are beginning to integrate displays that can play videos, providing users with a more convenient and integrated entertainment experience.

[0003] However, speakers with integrated displays are relatively large in size, and some displays are relatively heavy. The existing method of using a lifting structure to store the display has the defect that the display angle is inconvenient to adjust during use. The method of using a rotating folding structure to store the display has the defect that the user needs to provide a lot of force when flipping the heavy display upward, which results in a poor user experience. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a single-swing arm hinge device to solve the problem that after the current audio is integrated with the display, the angle of the display is inconvenient to adjust in the lifting and storage structure, and for some heavier displays using a rotating folding structure, the user needs to provide a large force to lift the display.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a single swing arm rotating shaft device, comprising:

[0006] Fixed seat;

[0007] A rotating shaft, the rotating shaft is rotatably mounted on the fixing seat, and a damping structure is provided between the rotating shaft and the fixing seat;

[0008] a first fixing member, wherein the first fixing member is assembled on the rotating shaft;

[0009] A telescopic member is arranged on the fixed seat, one end of the telescopic member is connected to one end of the rotating shaft; the telescopic member provides a force to drive the rotating shaft to rotate in the opposite direction.

[0010] Furthermore, the telescopic member provides a force that prevents the rotating shaft from excessively rotating in the positive direction.

[0011] As a further improvement of the utility model: the telescopic member is any one of an elastic member, a gas spring and a hydraulic cylinder.

[0012] As a further improvement of the utility model: a swing arm is further provided, one end of the swing arm is mounted on the rotating shaft, and the other end of the swing arm is coaxially connected to one end of the telescopic member. One end of the swing arm can be sleeved and mounted on the outer periphery of the rotating shaft.

[0013] As a further improvement of the utility model: a damping member is provided between the rotating shaft and the swing arm.

[0014] As a further improvement of the utility model: the fixing seat is also provided with a positioning shaft, and the other end of the telescopic member is coaxially connected to the positioning shaft. For example, the other end of the telescopic member is sleeved on the outer periphery of the positioning shaft. The central axis of the positioning shaft, the rotation axis of the swing arm, and the central axis of the rotating shaft are parallel to each other.

[0015] As a further improvement of the present invention: a limit block is provided on the fixing seat, and when the rotating shaft rotates in the opposite direction to the first limit angle, the bottom of the first fixing member abuts against the limit block.

[0016] As a further improvement of the present invention: a limiting portion is provided on the bottom of the first fixing member or the rotating shaft, and when the rotating shaft rotates in the positive direction to the second limit angle, an escape space is formed between the limiting portion and the fixing seat.

[0017] As a further improvement of the utility model: a first rotating part is provided at one end of the fixing seat, a second rotating part is provided at the other end of the fixing seat, and the rotating shaft is provided between the first rotating part and the second rotating part.

[0018] As a further improvement of the present invention: a damping sleeve is provided in the first rotating part and / or the second rotating part, and the damping sleeve is provided on the outer periphery of the end of the rotating shaft.

[0019] As a further improvement of the utility model: a second fixing piece is provided on the fixing seat, a through hole is opened on one side of the second fixing piece, and the rotating shaft passes through the through hole.

[0020] As a further improvement of the present invention: a damping gasket is provided between the second fixing member and the swing arm, and the damping gasket is sleeved on the outer circumference of the rotating shaft.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model rotatably assembles the rotating shaft on the fixing seat, and arranges a damping component between the rotating shaft and the fixing seat, so that there is damping when the first fixing member on the assembled rotating shaft rotates with the rotating shaft, and the first fixing member remains stationary without the action of external force after rotation. A telescopic member is also connected to one end of the rotating shaft to hinder the rotating shaft from rotating excessively in the forward direction, thereby preventing the display on the first fixing member from rotating excessively and colliding with the sound body, and providing assistance when the rotating shaft rotates in the reverse direction, so that the user can easily lift the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of an initial 0° locking state of a single swing arm rotating shaft device according to an embodiment of the utility model.

[0024] Figure 2 This is a structural schematic diagram of a single swing arm rotating shaft device in a 75° locked state according to an embodiment of the utility model.

[0025] Figure 3 This is a structural schematic diagram of a single swing arm rotating shaft device in a 195° locked state according to an embodiment of the utility model.

[0026] Figure 4 This is an exploded view of a single swing arm rotating shaft device in a 195° locked state according to an embodiment of the utility model.

[0027] Figure 5 It is a side view of an initial 0° locking state of a single swing arm rotating shaft device according to an embodiment of the utility model.

[0028] Figure 6 It is a side view of a single swing arm rotating shaft device in a 75° locked state according to an embodiment of the utility model.

[0029] Figure 7 It is a side view of a single swing arm rotating shaft device in a 195° locked state according to an embodiment of the utility model.

[0030] Reference numerals:

[0031] 1. Fixed seat, 2. Rotating shaft, 3. First fixed part, 4. Telescopic part, 5. Display, 6. Swing arm, 61. First rotating part, 62. Second rotating part, 7. Positioning shaft, 8. Limit block, 9. Positioning part, 10. Limit part, 11. Damping sleeve, 12. Second fixed part, 13. Damping gasket. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In order to solve the technical problems in the prior art, the utility model is further described in combination with the accompanying drawings and embodiments:

[0035] like Figures 1 to 5 As shown, an embodiment of the utility model discloses a single swing arm 6 rotating shaft 2 device, a fixed seat 1, a rotating shaft 2, a first fixed component 3 and a telescopic component 4, the fixed seat 1 serves as a supporting body of the single swing arm 6 rotating shaft 2 device, the rotating shaft 2 is rotatably mounted on the fixed seat 1, and a damping structure is provided between the rotating shaft 2 and the fixed seat 1; the first fixed component 3 is mounted on the rotating shaft 2, and a display 5 is installed on the first fixed component 3; the telescopic component 4 is provided on the fixed seat 1, and one end of the telescopic component 4 is connected to one end of the rotating shaft 2.

[0036] The telescopic member 4 provides a force to prevent the shaft 2 from excessively rotating in the forward direction, and provides a force to drive the shaft 2 to rotate in the reverse direction.

[0037] The force that prevents the shaft 2 from rotating excessively in the forward direction can also be understood as the telescopic member 4 providing a displacement / stroke that prevents the shaft 2 from rotating in the forward direction beyond a set limit angle. The set limit angle is the maximum angle at which the shaft 2 can rotate in the forward direction without colliding with the display 5 and the audio body.

[0038] The telescopic member 4 provides a force to drive the rotating shaft 2 to rotate in the opposite direction, which can also be understood as: when one end of the telescopic member 4 is in the first position, the display 5, the first fixing member 3, and the rotating shaft 2 remain stationary relative to the fixing base 1 without the action of external force. When a force is applied to drive the rotating shaft 2 to rotate in the opposite direction, the telescopic member 4 provides a displacement / stroke to drive the rotating shaft 2 to rotate in the opposite direction, so that the telescopic member 4 drives the rotating shaft 2, the first fixing member 3 and the display screen to rotate in the opposite direction. For some heavier displays 5, the storage work can be completed more smoothly and easily under the change of the displacement / stroke of the telescopic member 4.

[0039] In this embodiment, the rotating shaft 2 drives the first fixing member 3 to rotate, and the positive rotation direction is defined as the storage direction of the display 5 on the first fixing member 3 , and the reverse rotation direction is defined as the unfolding direction of the display 5 .

[0040] The fixing base 1 is arranged on one side of the main body of the audio system, and can be on the upper side or any side of the surroundings of the main body of the audio system. Usually, the fixing base 1 is arranged on the upper part of the main body of the audio system, and when the display 5 on the first fixing member 3 is folded and rotated to be close to the surrounding sides of the main body of the audio system, the overall volume of the audio system becomes smaller after the display 5 is stored, and it is convenient for users to carry.

[0041] In a specific example, when the shaft 2 rotates forward, the display 5 rotates downward and is folded and stored at any side of the speaker body. When the shaft 2 rotates reversely, the display 5 flips upward and stands at the upper position of the fixing base 1, such as Figure 7 shown.

[0042] In this embodiment, the rotating shaft 2 equipped with the first fixing member 3 is installed on the fixing seat 1, and a damping structure is provided between the rotating shaft 2 and the fixing seat 1, so that when the rotating shaft 2 on the fixing seat 1 rotates itself, the first fixing member 3 and the display 5 thereon rotate around the central axis of the rotating shaft 2 and remain motionless without external force, and can also prevent the display 5 from rotating and colliding with the fixing seat 1 due to its own weight when it is rotated forward for storage. At the same time, under the action of the damping structure, the display 5 can be fixed at different angles, improving the user's use experience and viewing experience, and solving the problem that the angle of the display 5 is inconvenient to adjust in the current lifting storage structure.

[0043] In addition, the present embodiment further provides a telescopic member 4 to limit the rotation of the rotating shaft 2, so that when the rotating shaft 2 rotates forward, a force is provided to prevent the rotating shaft 2 from rotating excessively forward, thereby preventing the rotating shaft 2 from rotating excessively and preventing the display 5 from rotating excessively and colliding with the main body of the sound system. When the rotating shaft 2 rotates reversely, a force is provided to drive the rotating shaft 2 to rotate reversely, so that the rotating shaft 2 rotates smoothly and the display 5 on the first fixing member 3 stands up. This solves the problem that the display 5 is easily damaged by collision with the main body of the sound system when some bulky displays 5 are stored by the rotating folding mechanism.

[0044] In some embodiments, the rotating shaft 2 is a damping rotating shaft 2. In other words, the rotating shaft 2 is damped and hinged with the fixing seat 1. The damping structure allows the rotating shaft 2 to be damped when it rotates relative to the fixing seat 1, so that the display 5 on the first fixing member 3 can remain stationary without external force after rotating to any angle, thereby achieving multiple angle adjustments of the display 5 and improving the user experience.

[0045] It should be noted that, although the damping structure is a prior art, the combination and connection method of the damping structure and the telescopic member 4 and other structures are not a prior art.

[0046] In a specific example, a damping structure such as a rubber part or a silicone part is provided at the rotation connection between the rotating shaft 2 and the fixing base 1 to increase the friction between the rotating shaft 2 and the fixing base 1, so that there is damping when the rotating shaft 2 drives the first fixing part 3 and the display 5 to rotate.

[0047] In some embodiments, the telescopic member 4 is a gas spring or a hydraulic cylinder.

[0048] Among them, the gas spring mainly generates a pressure difference through the inert gas or oil-gas mixture filled inside, and uses the movement of the piston rod to achieve functions such as support, cushioning, braking, height adjustment and angle adjustment.

[0049] Hydraulic rods achieve telescopic movement through pressure changes of liquid (usually oil) in a closed system and are usually used in situations where greater thrust or pulling force is required.

[0050] In some embodiments, the telescopic member 4 can also be an elastic member such as an ordinary spring, high-elastic rubber, etc. The elastic member only needs to provide a force to prevent the shaft 2 from rotating excessively in the forward direction, and provide a force to drive the shaft 2 to rotate in the reverse direction.

[0051] In some embodiments, a swing arm 6 is further provided, one end of the swing arm 6 is sleeved on the rotating shaft 2 , and the other end of the swing arm 6 is coaxially connected to one end of the telescopic member 4 .

[0052] like Figure 4 As shown, when the first fixing member 3 is in a critical state of balance, an external force is applied to the first fixing member 3, and the telescopic member 4 drives the swing arm 6 to rotate in the opposite direction. The telescopic member 4 drives the swing arm 6 to rotate around the central axis of the rotating shaft 2, and drives the rotating shaft 2 to rotate in the opposite direction, so that the display 5 is assisted when it is unfolded, and the user can easily lift the display 5. In this critical state of balance, the display 5 remains stationary without the action of external force, but after the external force is applied, the telescopic member 4 will drive the rotating shaft 2 to rotate, thereby driving the first fixing member 3 and the display 5 to rotate and unfold.

[0053] In addition, by limiting the distance between the two ends of the swing arm 6, or limiting the rotation radius of the swing arm 6, and coordinating the extension and retraction actions of the telescopic part 4, the maximum rotation angle of the rotating shaft 2 is limited, thereby avoiding excessive rotation of the first fixing part 3 and preventing the display 5 on the first fixing part 3 from excessive rotation and colliding with the main body of the audio system.

[0054] In a specific example, the swing arm 6 is composed of a first rotating part 61 and a second rotating part 62. The first rotating part 61 is sleeved on the outer periphery of the rotating shaft 2, and the second rotating part 62 is connected to one end of the telescopic member 4. Usually, the telescopic member 4 and the second rotating part 62 are connected through a coaxial axis, and the central axis of the second rotating part 62 is parallel to the central axis of the rotating shaft 2. The distance between the central axis of the first rotating part 61 / rotating shaft 2 and the central axis of the second rotating part 62 is the rotation radius of the swing arm 6.

[0055] In some embodiments, the fixing seat 1 is further provided with a positioning shaft 7, and the other end of the telescopic member 4 is coaxially connected to the positioning shaft 7. For example, the other end of the telescopic member 4 is sleeved on the outer periphery of the positioning shaft 7. The central axis of the positioning shaft 7, the rotation axis 2 of the swing arm 6, and the central axis of the rotating shaft 2 are parallel to each other.

[0056] In some embodiments, taking the telescopic member 4 as a hydraulic cylinder as an example, when the display 5 is placed above the sound body / fixed base 1, Figure 3 and Figure 7As shown, at this time, the piston rod of the hydraulic cylinder extends out, and the other end of the swing arm 6 / the second rotating part 62 exceeds the front side of the rotating shaft 2. When the user stores the display 5, a force is applied to the first fixing member 3 / the display 5 on the first fixing member 3, the rotating shaft 2 rotates forward, the display 5 flips downward, the piston rod of the hydraulic cylinder retracts first, and the other end of the swing arm 6 rotates to the rear side of the rotating shaft 2. When the display 5 passes a critical angle, the external force is continued to be applied, and the display 5 continues to flip downward, and then the piston rod of the hydraulic cylinder extends out, as shown in FIG. Figure 1 The other end of the swing arm 6 is rotated to the upper side of the rotating shaft 2, that is, close to the display 5. Due to the limitation of the telescopic stroke of the telescopic member 4 and the rotation radius of the swing arm 6, the display 5 will not collide with the main body of the audio system when it is flipped downward for storage.

[0057] like Figure 1 As shown, when the display 5 is attached to the side of the sound body, the piston rod of the hydraulic cylinder is extended, and the other end of the swing arm 6 / the second rotating part 62 is close to the display 5. When the user unfolds the display 5, a force is applied to the first fixing member 3 / the display 5 on the first fixing member 3, the rotating shaft 2 rotates in the opposite direction, the display 5 flips upward, the piston rod of the hydraulic cylinder retracts first, and the other end of the swing arm 6 rotates away from the display 5. When the display 5 passes a critical angle, such as Figure 2 , Figure 6 The 75° locking state shown in the figure, the critical angle can be specifically adjusted according to the telescopic stroke of the telescopic member and the rotation radius of the swing arm. Similarly, the 195° locking angle can also be adjusted as needed. When a slight force is applied to the display 5, the piston rod of the hydraulic cylinder is extended, such as Figure 3 As shown, the other end of the swing arm 6 is brought close to the display 5 , so that the display 5 is assisted to continue to flip upward, and the user can easily unfold the display 5 .

[0058] In some embodiments, a damping member is provided between the rotating shaft 2 and the swing arm 6. The damping member increases the friction between the rotating shaft 2 and the swing arm 6, and cooperates with the damping structure between the rotating shaft 2 and the fixed shaft, so that the rotating shaft 2 drives the first fixing member 3 and the display 5 thereon to rotate with increased damping, and the display 5 will not be stored too quickly, and can stay at any position without external force.

[0059] In some embodiments, Figure 3 and Figure 4 As shown, a limit block 8 is provided on the fixing seat 1 , and when the rotating shaft 2 rotates in the opposite direction to the first limit angle, the bottom of the first fixing member 3 abuts against the limit block 8 .

[0060] By setting a limit block 8 on the fixing base 1, the maximum angle of reverse rotation of the first fixing member 3 is limited, so that when the display 5 is above the fixing base 1, the display 5 is not easy to reversely rotate when the audio body is moved at will, and the stability of the fixed angle of the display 5 is increased, which is convenient for users to watch videos.

[0061] In addition, the fixed angle between the display 5 and the fixing base 1 is achieved by adjusting the height of the limit block 8. Obviously, when the height of the limit block 8 is too low, after the bottom of the first fixing member 3 abuts against the limit block 8, the angle between the display 5 and the fixing base 1 is too small. On the contrary, when the height of the limit block 8 is too high, the angle between the display 5 and the fixing base 1 increases.

[0062] In some embodiments, Figure 3 and Figure 4 As shown, a positioning member 9 is provided on the front side of the fixing seat 1, and when the rotating shaft 2 rotates in the opposite direction to the first limit angle, the swing arm 6 abuts against the positioning member 9. The positioning member 9 limits the swing arm 6 from rotating excessively, further preventing the rotating shaft 2 from rotating excessively.

[0063] In some embodiments, a limiting portion 10 is provided at the bottom of the first fixing member 3 , and when the rotating shaft 2 rotates in the positive direction to the second limit angle, an escape space is formed between the limiting portion 10 and the fixing seat 1 .

[0064] It should be noted that, in this embodiment, the first limit angle can be understood as the viewing angle between the first fixing member 3 and the fixing base 1, which is limited to the maximum angle of the reverse rotation of the shaft 2, at which time the display 5 is in the unfolded state, and the user can watch the content played on the display screen. The second limit angle is the fitting angle between the first fixing member 3 and the fixing base 1, which is limited to the maximum angle of the forward rotation of the shaft 2, at which time the display 5 is in the stored state.

[0065] By arranging a limiting portion 10 on the first fixing member 3, with the cooperation of the telescopic member 4 and the rotating shaft 2, when the display 5 is at the second extreme angle, an avoidance space is formed between the limiting portion 10 and the fixing seat 1, that is, the display 5 will not come into contact with the fixing seat 1, and the limiting portion 10 is further used to prevent the display 5 from colliding with the main body of the audio system. In this embodiment, the fixing seat 1 can be understood as the main body of the audio system, and the single swing arm 6 rotating shaft 2 device is installed on the audio system.

[0066] Usually, the first fixing member 3 can be arranged in an L-shape. Alternatively, the limiting portion 10 is arranged on the rotating shaft 2, and the first fixing member 3 is directly connected to the limiting portion 10 to form an L-shape.

[0067] In some embodiments, a first rotating portion is disposed at one end of the fixing base 1 , a second rotating portion is disposed at the other end of the fixing base 1 , and the rotating shaft 2 is disposed between the first rotating portion and the second rotating portion.

[0068] The rotating shaft 2 is fixedly arranged on the fixing seat 1 by the first rotating part and the second rotating part, and the rotating shaft 2 can rotate on the fixing seat 1. The first rotating part and the second rotating part can be in the shape of a through hole or a groove.

[0069] Preferably, a damping sleeve 11 is provided in the first rotating part and / or the second rotating part, and the damping sleeve 11 is provided on the outer periphery of the end of the rotating shaft 2 .

[0070] The damping sleeve 11 serves as a damping structure. The first rotating part and the second rotating part are the connection points between the fixed seat 1 and the rotating shaft 2. By providing the damping sleeve 11, the friction force of rotation between the rotating shaft 2 and the fixed seat 1 is increased.

[0071] In some embodiments, a second fixing member 12 is disposed on the fixing seat 1 , a through hole is formed on one side of the second fixing member 12 , and the rotating shaft 2 passes through the through hole.

[0072] The second fixing member 12 can fix the telescopic member 4 on the one hand, and ensure the stability and reliability of the rotation of the rotating shaft 2 on the other hand.

[0073] In a specific example, a damping gasket 13 is provided between the second fixing member 12 and the swing arm 6 , and the damping gasket 13 is sleeved on the outer circumference of the rotating shaft 2 .

[0074] The friction between the second fixing member 12 and the rotating shaft 2 is increased by the damping gasket 13, so that there is greater damping when the rotating shaft 2 drives the first fixing member 3 and the display 5 to rotate, and when rotated to any angle, it can remain motionless without external force. When the rotating shaft 2 rotates forward to store the display 5, the display 5 will not rotate to the side of the fixing base 1 by itself under the action of the gravity of the display 5, thereby preventing some overweight displays 5 from directly rotating and colliding with the fixing base 1.

[0075] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0076] In summary, after reading the utility model document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the utility model without creative mental labor, which all fall within the scope of protection of the utility model.

Claims

1. A single swing arm shaft device, characterized in that: include: Fixed seat; A rotating shaft, the rotating shaft is rotatably mounted on the fixing seat, and a damping structure is provided between the rotating shaft and the fixing seat; a first fixing member, wherein the first fixing member is assembled on the rotating shaft; The telescopic member is arranged on the fixing seat, one end of the telescopic member is connected to one end of the rotating shaft; the telescopic member provides a force to drive the rotating shaft to rotate in the opposite direction.

2. A single swing arm shaft device according to claim 1, characterized in that: The telescopic member is any one of an elastic member, a gas spring and a hydraulic cylinder.

3. A single swing arm rotating shaft device according to claim 1 or 2, characterized in that: A swing arm is also provided, one end of which is mounted on the rotating shaft, and the other end of which is coaxially connected to one end of the telescopic member.

4. A single swing arm rotating shaft device according to claim 3, characterized in that: A damping member is provided between the rotating shaft and the swing arm.

5. The single swing arm shaft device according to claim 3, characterized in that: The fixing seat is also provided with a positioning shaft, and the other end of the telescopic member is coaxially connected with the positioning shaft.

6. The single swing arm rotating shaft device according to claim 3, characterized in that: The fixing seat is provided with a limit block, and when the rotating shaft rotates in the opposite direction to a first limit angle, the bottom of the first fixing member abuts against the limit block.

7. A single swing arm shaft device according to claim 1, 2, 4 or 6, characterized in that: A limiting portion is provided on the bottom of the first fixing member or the rotating shaft. When the rotating shaft rotates in the positive direction to the second limit angle, an escape space is formed between the limiting portion and the fixing seat.

8. The single swing arm rotating shaft device according to claim 1, characterized in that: A first rotating part is disposed at one end of the fixing seat, a second rotating part is disposed at the other end of the fixing seat, and the rotating shaft is disposed between the first rotating part and the second rotating part.

9. The single swing arm rotating shaft device according to claim 8, characterized in that: A damping sleeve is provided in the first rotating part and / or the second rotating part, and the damping sleeve is arranged on the outer periphery of the end of the rotating shaft.

10. The single swing arm rotating shaft device according to claim 1, characterized in that: The telescopic member provides a force that prevents the rotating shaft from excessively rotating in the positive direction.

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