Extension arm mechanism and medical suspension bridge
By using connecting components, including connecting shafts, fasteners and dampers in medical extension arm mechanisms, the automatic locking effect is achieved, solving the problem of operation troubles in the prior art, improving work efficiency and reducing maintenance requirements.
Patent Information
- Application Number
- CN202420845252.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-22
AI Technical Summary
The locking method of the existing medical extension arm mechanism needs to be manually adjusted, which is troublesome and time-consuming to operate, affecting working efficiency.
An extension arm mechanism including the first operating arm and the second operating arm is designed, and the automatic locking effect is achieved through the connection assembly (connecting shaft, fastener and damper). The user only needs to apply a friction force greater than the preset Rotate the operating arm and stop automatically after the rotation torque disappears, saving operating time.
It improves the rotation convenience of the extension arm, saves operating time, improves work efficiency, and does not require regular maintenance and adjustment of damping parts, saving manpower and material resources.
Smart Images
Figure CN222285852U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical suspension bridges, in particular to an extension arm mechanism and a medical suspension bridge. Background Art
[0002] Medical pendants are mainly used in important departments of hospitals to facilitate the work of medical staff. The extension arm is a set of components installed on the pendant, which is used to hang infusion bottles, injection pumps, infusion pumps, nutrition pumps and other equipment.
[0003] The extension arm includes a first extension arm, a second extension arm and a connecting shaft, the connecting shaft connects the first extension arm and the second extension arm, the locking of the existing extension arm mechanism is connected by the connecting shaft and the knob, the general manual rotation knob is used to adjust the tightness with the connecting shaft and then adjust the tightness of the extension arm, after loosening, the extension arms can be rotated with each other, and after tightening again, the angle can be fixed. The manual adjustment method of tightness is cumbersome to operate, takes a lot of time, and affects work efficiency. Utility Model Content
[0004] The main purpose of the utility model is to provide an extension arm mechanism, aiming to improve the convenience of the extension arm rotation, save operation time and improve work efficiency.
[0005] To achieve the above-mentioned purpose, the extension arm mechanism proposed in the utility model comprises:
[0006] a first operating arm and a second operating arm, wherein one end of the first operating arm is used to be mounted on the suspension bridge body, one end of the second operating arm is used to connect the medical appliance, the other end of the first operating arm is provided with a first movable hole, and the other end of the second operating arm is provided with a second movable hole;
[0007] A connecting assembly, the connecting assembly comprising a connecting shaft, a fastener and at least two damping members, the connecting shaft is movably arranged in the first movable hole and the second movable hole in sequence, the fastener is connected to the connecting shaft and abuts against the first operating arm or the second operating arm, at least the damping members are respectively arranged on the hole walls of the first movable hole and the second movable hole and radially abut against the connecting shaft, and the damping members have a preset friction force;
[0008] The first operating arm and / or the second operating arm are rotated by a force greater than the preset friction force to adjust the angle therebetween.
[0009] Optionally, the first operating arm is provided with a first connecting hole along an axial direction perpendicular to the first movable hole, the first connecting hole is connected to the first movable hole, and the damping member is inserted into the first connecting hole and abuts against the connecting shaft.
[0010] Optionally, the second operating arm is provided with a second connecting hole along an axial direction perpendicular to the second movable hole, the second connecting hole is connected to the second movable hole, and the damping member is inserted into the second connecting hole and abuts against the connecting shaft.
[0011] Optionally, the number of the damping members is four, the number of the first connecting holes is two, the two first connecting holes are arranged opposite to each other, and two of the damping members are respectively inserted in the two first connecting holes; the number of the second connecting holes is two, the two second connecting holes are arranged opposite to each other, and another two of the damping members are respectively inserted in the two second connecting holes.
[0012] Optionally, a limit block is radially protruded at one end of the connecting shaft, and the diameter of the limit block is larger than the first connecting hole and the second connecting hole. The fastener is connected to the other end of the connecting shaft and abuts against the first operating arm or the second operating arm.
[0013] Optionally, the connecting assembly further includes a retaining ring, and an outer wall of the connecting shaft located at the fastener away from the first operating arm or the second operating arm is recessed with a clamping groove, and the retaining ring is clamped in the clamping groove and abuts against the fastener.
[0014] Optionally, the connecting assembly further includes a gasket, which is sleeved on the connecting shaft and located between the first operating arm and the second operating arm.
[0015] Optionally, the extension arm mechanism also includes a fixed seat and a rotating shaft, one end of the first operating arm is connected to the fixed seat, the rotating shaft movably passes through one end of the first operating arm and the fixed seat, and the damping member passes through one end of the first operating arm and is supported by the fixed seat.
[0016] Optionally, the connecting assembly further comprises an end cover, and the end cover is arranged to cover an opening of the first movable hole and / or the second movable hole away from the connecting shaft.
[0017] The utility model also provides a medical suspension bridge, comprising the extension arm mechanism as described above.
[0018] The technical solution of the utility model is to set a connecting assembly between the first operating arm and the second operating arm, the connecting assembly includes a connecting shaft, a fastener and at least two damping members, the connecting shaft and the fastener connect the first operating arm and the second operating arm, the end of the first operating arm is provided with a first movable hole, and the end of the second operating arm is provided with a second movable hole; the connecting shaft is movably arranged in the first movable hole and the second movable hole in turn, and the damping members are respectively arranged on the hole walls of the first movable hole and the second movable hole and abut against the connecting shaft, so that the first operating arm and the second operating arm both have resistance when rotating, when the user applies a rotational force greater than the resistance, the first operating arm and the second operating arm can be rotated, when the rotational force stops being applied, the first operating arm and the second operating arm stop rotating, and the locking effect is achieved, and the effect of automatically locking the operating arm can be achieved, the convenience of the extension arm rotation is improved, the operation time is saved, and the work efficiency is improved. And as long as the preload of the damping member is adjusted at the time of leaving the factory, the damping force of the rotation of the first operating arm and the second operating arm can be obtained, and regular maintenance is not required, saving manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 It is a structural schematic diagram of an embodiment of the extension arm mechanism of the utility model;
[0021] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the extension arm mechanism shown;
[0022] Figure 3 It is a partial cross-sectional structural schematic diagram of the extension arm mechanism of the utility model;
[0023] Figure 4 It is a structural schematic diagram of the connecting assembly in the extension arm mechanism of the utility model;
[0024] Figure 5 It is a schematic diagram of the exploded structure of the connecting assembly in the extension arm mechanism of the utility model.
[0025] Description of Figure Numbers:
[0026]
[0027]
[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. 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.
[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0032] The utility model provides an extension arm mechanism 1.
[0033] In the embodiment of the present utility model, Figures 1 to 5As shown, the extension arm mechanism 1 includes a first operating arm 10, a second operating arm 30 and a connecting assembly 50; one end of the first operating arm 10 is used to be installed on the suspension bridge body, and one end of the second operating arm 30 is used to connect medical equipment. A first movable hole 11 is opened at the end of the first operating arm 10, and a second movable hole 31 is opened at the end of the second operating arm 30; the connecting assembly 50 includes a connecting shaft 51, a fastener 52 and at least two damping members 53, the connecting shaft 51 is movably arranged in the first movable hole 11 and the second movable hole 31 in turn, the fastener 52 is connected to the connecting shaft 51, and is abutted against the first operating arm 10 or the second operating arm 30, at least two damping members 53 are respectively arranged on the hole walls of the first movable hole 11 and the second movable hole 31, and are radially abutted against the connecting shaft 51, and the damping member 53 has a preset friction force; the rotation is greater than the preset friction force to rotate the first operating arm 10 and / or the second operating arm 30 to adjust the angle between the two.
[0034] In this embodiment, the connecting assembly 50 ensures flexible operation and stable fixation of the medical appliance. This mechanism is not only easy to install and disassemble, but also its function of adjusting the angle enables the doctor to accurately position and operate the medical appliance in different situations. In actual application, when the doctor needs to adjust the angle of the medical appliance, he only needs to apply appropriate force to overcome the preset friction force of the damping member 53 and rotate the first operating arm 10 or the second operating arm 30. This design not only ensures the flexibility of adjustment, but also avoids misoperation to a certain extent.
[0035] Furthermore, the design of the fastener 52 ensures the stability and reliability of the connecting shaft 51. By fixing the connecting shaft 51 to the first operating arm 10 or the second operating arm 30 through the fastener 52, the connecting shaft 51 can be effectively prevented from falling off or loosening during operation.
[0036] The extension arm mechanism 1 is composed of three parts: a first operating arm 10, a second operating arm 30 and a connecting assembly 50. One end of the first operating arm 10 is designed to be installed on the suspension bridge body or other fixed structures, and the other end is connected to the second operating arm 30 through the connecting assembly 50. One end of the second operating arm 30 is specifically used to connect terminal devices such as medical equipment, cameras, and robotic arms, and the other end is also connected to the connecting assembly 50. This structural design makes the extension arm mechanism 1 highly flexible and adjustable, and can adapt to various complex working environments.
[0037] A first movable hole 11 and a second movable hole 31 are respectively provided at the ends of the first operating arm 10 and the second operating arm 30. The design of the two movable holes ingeniously realizes the rotation and angle adjustment functions of the operating arms. The connecting assembly 50 includes a connecting shaft 51, a fastener 52 and at least two damping members 53. The connecting shaft 51 is movably arranged in the first movable hole 11 and the second movable hole 31 in turn, and the fastener 52 is connected to the connecting shaft 51 and abuts against the first operating arm 10 or the second operating arm 30 to ensure the stability and reliability of the connecting shaft 51.
[0038] The damping member 53 is a key component in the extension arm mechanism 1, which is respectively arranged on the hole walls of the first movable hole 11 and the second movable hole 31, and radially abuts against the connecting shaft 51. The damping member 53 has a preset friction force, and this design requires that a certain resistance needs to be overcome when the operating arm is rotated, thereby achieving stable rotation and precise angle adjustment.
[0039] The working principle of the extension arm mechanism 1 is mainly based on mechanical transmission and damping control. When the angle of the operating arm needs to be adjusted, the user can overcome the friction of the damping member 53 by rotating the operating arm. Once the rotational torque is greater than the preset friction, the operating arm can start to rotate, thereby achieving precise adjustment of the terminal device. This adjustment method is not only simple and easy, but also can ensure the stability and safety of the operating arm during the adjustment process. When the rotational torque disappears, the operating arm stops rotating, and due to the friction, the two operating arms can stop relative to each other, achieving a hovering effect.
[0040] In addition, the role of the fastener 52 cannot be ignored. It not only ensures the tight connection between the connecting shaft 51 and the operating arm, but also prevents the operating arm from loosening or falling off during the rotation process. This stable connection method enables the extension arm mechanism 1 to operate stably in various harsh environments, providing strong support for various applications.
[0041] The technical solution of the utility model is to set a connecting component 50 between the first operating arm 10 and the second operating arm 30, and the connecting component 50 includes a connecting shaft 51, a fastener 52 and at least two damping members 53. The connecting shaft 51 and the fastener 52 connect the first operating arm 10 and the second operating arm 30. The end of the first operating arm 10 is provided with a first movable hole 11, and the end of the second operating arm 30 is provided with a second movable hole 31; the connecting shaft 51 is movably penetrated through the first movable hole 11 and the second movable hole 31 in sequence, and the damping members 53 are respectively provided on the hole walls of the first movable hole 11 and the second movable hole 31 and abut against the connecting shaft 51, so that the first operating arm 10 and the second operating arm 30 both have resistance when rotating. When the user applies a rotational force greater than the resistance, the first operating arm 10 and the second operating arm 30 can be rotated. When the rotational force stops being applied, the first operating arm 10 and the second operating arm 30 stop rotating to achieve a locking effect, which can achieve the effect of automatically locking the operating arm, improve the convenience of rotating the extension arm, save operation time, and improve work efficiency. Furthermore, as long as the preload of the damping member 53 is adjusted properly before leaving the factory, the damping force for the rotation of the first operating arm 10 and the second operating arm 30 can be obtained, and regular maintenance is not required, thus saving manpower and material resources.
[0042] In one embodiment of the present invention, Figures 1 to 5 As shown, the first operating arm 10 is provided with a first connecting hole 13 along an axial direction perpendicular to the first movable hole 11 . The first connecting hole 13 is connected to the first movable hole 11 . The damping member 53 is inserted into the first connecting hole 13 and abuts against the connecting shaft 51 .
[0043] In this embodiment, the first operating arm 10 is further provided with a first connecting hole 13, and the first connecting hole 13 is connected to the first movable hole 11. It is understandable that the first connecting hole 13 can be arranged along the radial direction of the first movable hole 11, or can be arranged obliquely with the axial direction of the first movable hole 11. The damping member 53 is inserted into the first connecting hole 13, which can ensure that it can be firmly held against the connecting shaft 51 on the one hand, and can realize the adjustment of the damping member 53 and the adjustment of different insertion depths of the damping member 53 on the other hand. When the first operating arm 10 starts the rotation mechanism, the damping member 53 will move synchronously therewith, and the damping member 53 provides a moderate damping effect between the first operating arm 10 and the connecting shaft 51 through its unique internal structure and material properties. This effect not only limits the speed and angle of rotation of the first operating arm 10, but also ensures the stability of the first operating arm 10 during rotation. Such a design greatly improves the convenience of users during use, and further improves work efficiency and user comfort experience.
[0044] In one embodiment of the present invention, Figures 1 to 5As shown, the second operating arm 30 is provided with a second connecting hole 33 along an axial direction perpendicular to the second movable hole 31 . The second connecting hole 33 is connected to the second movable hole 31 . The damping member 53 is inserted into the second connecting hole 33 and abuts against the connecting shaft 51 .
[0045] In this embodiment, the second operating arm 30 is further provided with a second connecting hole 33, and the second connecting hole 33 is connected to the second movable hole 31. It is understandable that the second connecting hole 33 can be arranged along the radial direction of the second movable hole 31, or can be arranged obliquely with the axial direction of the second movable hole 31. The damping member 53 is inserted into the second connecting hole 33, which can ensure that it can be firmly held against the connecting shaft 51 on the one hand, and can realize the adjustment of the damping member 53 and the adjustment of different insertion depths of the damping member 53 on the other hand. When the second operating arm 30 starts the rotation mechanism, the damping member 53 will move synchronously therewith, and the damping member 53 provides a moderate damping effect between the second operating arm 30 and the connecting shaft 51 through its unique internal structure and material properties. This effect not only limits the speed and angle of rotation of the second operating arm 30, but also ensures the stability of the second operating arm 30 during the rotation process. Such a design greatly improves the convenience of users during use, and further improves work efficiency and user comfort experience.
[0046] In one embodiment of the present invention, Figures 2 to 5 As shown, the number of damping members 53 is four, the number of first connecting holes 13 is two, the two first connecting holes 13 are arranged opposite to each other, and the two damping members 53 are respectively inserted in the two first connecting holes 13, the number of second connecting holes 33 is two, the two second connecting holes 33 are arranged opposite to each other, and the other two damping members 53 are respectively inserted in the two second connecting holes 33.
[0047] Each damping member 53 fits tightly in the corresponding first connecting hole 13 or the second connecting hole 33. This tight fit ensures that the damping member 53 can effectively reduce or prevent vibration and noise between the connecting parts, and the two damping members 53 arranged opposite to each other can balance the damping force during the rotation of the first operating arm 10 or the second operating arm 30, and are evenly distributed on both sides, thereby improving the force stability during the rotation process.
[0048] Furthermore, the damping elements 53 are made of high-quality materials that are resistant to wear, impact and high temperatures, which means that the damping elements 53 can maintain their performance stable both in normal use and under extreme working conditions, thereby ensuring the durability and reliability of the connection components.
[0049] It is worth mentioning that the design of these damping members 53 also takes into account the convenience of installation and removal. For example, their shape and size make them easy to insert and remove manually or with tools. This greatly reduces the difficulty and cost of maintaining and replacing the damping members 53.
[0050] In one embodiment of the present invention, Figures 2 to 5 As shown, a limit block 511 is radially protruded at one end of the connecting shaft 51, and the diameter of the limit block 511 is larger than the first connecting hole 13 and the second connecting hole 33. The fastener 52 is connected to the other end of the connecting shaft 51 and abuts against the first operating arm 10 or the second operating arm 30.
[0051] In this embodiment, the diameter of the limit block 511 is larger than the first connecting hole 13 and the second connecting hole 33. The fastener 52 is connected to the other end of the connecting shaft 51 and abuts against the first operating arm 10 or the second operating arm 30. The setting of the limit block 511 can effectively prevent the connecting shaft 51 from escaping from the first connecting hole 13 or the second connecting hole 33. Since the diameter of the limit block 511 is larger than the diameter of the hole, when the connecting shaft 51 is inserted into the hole, the limit block 511 will play a blocking role, thereby preventing the first operating arm 10 and the second operating arm 30 from escaping from the connecting shaft 51.
[0052] The fastener 52 is designed to ensure a stable connection between the connecting shaft 51 and the first operating arm 10 or the second operating arm 30. The fastener 52 may be a nut or other similar fasteners 52, which may be screwed onto the other end of the connecting shaft 51 and generate friction through contact with the operating arm, thereby preventing the connecting shaft 51 from loosening or falling off the operating arm.
[0053] In one embodiment of the present invention, Figures 2 to 5 As shown, the connection assembly 50 further includes a retaining ring 54 , and a clamping groove is recessed on the outer wall of the connection shaft 51 located on the fastener 52 away from the first operating arm 10 or the second operating arm 30 . The retaining ring 54 is clamped in the clamping groove and abuts against the fastener 52 .
[0054] In this embodiment, the retaining ring 54 is a part of the connecting assembly 50. Its function is not only to fix the connecting shaft 51, but also to enhance the stability and durability of the entire assembly. By clamping the retaining ring 54 in the clamping groove of the connecting shaft 51, not only the fastener 52 is more firmly fixed on the operating arm, but also the fastener 52 is effectively prevented from loosening or falling off during use.
[0055] The design of the retaining ring 54 also fully considers the convenience and comfort of operation. It abuts against the outer wall of the fastener 52, not only providing sufficient support force, but also making the operation of the fastener 52 smoother. Whether tightening or loosening, the user can simply rotate the fastener 52 without worrying about the connection assembly 50 being loose or falling off.
[0056] In addition, the fit between the retaining ring 54 and the clamping groove of the connecting shaft 51 has also been carefully designed. The depth and width of the clamping groove match the size of the retaining ring 54, so that the retaining ring 54 can be tightly clamped in the clamping groove, while also avoiding the problem of assembly difficulty or damage to components due to over-tight fit.
[0057] In one embodiment of the present invention, Figures 2 to 5 As shown, the connection assembly 50 further includes a gasket 55 , which is sleeved on the connection shaft 51 and located between the first operating arm 10 and the second operating arm 30 .
[0058] In this embodiment, the design of the gasket 55 is ingenious and delicate, and its main function is to enhance the stability and durability of the connecting shaft 51. The gasket 55 is made of high-quality materials and can withstand high pressure and frequent operations. During the assembly process, the gasket 55 is sleeved on the connecting shaft 51 and is located between the first operating arm 10 and the second operating arm 30. Its existence not only ensures the tight connection between the operating arms, but also plays a buffering role when the operating arms are subjected to external forces, reducing the impact of stress on the connecting shaft 51.
[0059] In one embodiment of the present invention, Figures 1 to 3 As shown, the extension arm mechanism 1 also includes a fixed seat 60 and a rotating shaft 70. One end of the first operating arm 10 is connected to the fixed seat 60. The rotating shaft 70 is movably penetrated through one end of the first operating arm 10 and the fixed seat 60. The damping member 53 is penetrated through one end of the first operating arm 10 and abuts against the fixed seat 60.
[0060] The connection between the first operating arm 10 and the fixing seat 60 not only ensures the firmness of the connection, but also allows the operating arm to move freely within a certain range. The introduction of the damping member 53 provides an excellent buffering effect for the connection between the first operating arm 10 and the fixing seat 60. When the operating arm is impacted by an external force, the damping member 53 can effectively absorb the impact energy and reduce the damage to the mechanism. At the same time, the damping member 53 can also adjust the movement speed of the operating arm, making the operation more stable and smooth.
[0061] In one embodiment of the present invention, Figure 5 As shown, the connection assembly 50 further includes an end cover 56 , which is disposed to cover the opening of the first movable hole 11 and / or the second movable hole 31 away from the connection shaft 51 .
[0062] The end cap 56 is designed to ensure the integrity and safety of the connection assembly 50. By covering the openings of the first movable hole 11 and the second movable hole 31, the end cap 56 can effectively prevent external impurities and dust from entering the holes, thereby keeping the holes clean and smooth.
[0063] The end cap 56 is usually made of wear-resistant and corrosion-resistant materials to ensure its high durability and stability. In addition, the fit between the end cap 56 and the connecting shaft 51 also needs to be precisely designed and manufactured to ensure its tightness and stability. In addition to the basic protective function, the end cap 56 can also be customized as needed to meet specific usage requirements. For example, an anti-slip texture can be added to the surface of the end cap 56 to improve stability during operation; or a sealing gasket can be set inside the end cap 56 to enhance its sealing performance.
[0064] The utility model also provides a medical suspension bridge, which includes an extension arm mechanism 1. The specific structure of the extension arm mechanism 1 refers to the above embodiment. Since the medical suspension bridge adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.
[0065] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An extension arm mechanism, characterized in that: include: A first operating arm (10) and a second operating arm (30), wherein one end of the first operating arm (10) is used for being mounted on a suspension bridge body, and one end of the second operating arm (30) is used for connecting a medical device, and the other end of the first operating arm (10) is provided with a first movable hole (11), and the other end of the second operating arm (30) is provided with a second movable hole (31); A connecting assembly (50), the connecting assembly (50) comprising a connecting shaft (51), a fastener (52) and at least two damping members (53), the connecting shaft (51) being movably arranged in the first movable hole (11) and the second movable hole (31) in sequence, the fastener (52) being connected to the connecting shaft (51) and being pressed against the first operating arm (10) or the second operating arm (30), the at least two damping members (53) being respectively arranged on the hole walls of the first movable hole (11) and the second movable hole (31) and being radially pressed against the connecting shaft (51), and the damping member (53) having a preset friction force; The first operating arm (10) and / or the second operating arm (30) are rotated with a force greater than the preset friction force to adjust the angle therebetween.
2. The extension arm mechanism according to claim 1, characterized in that: The first operating arm (10) is provided with a first connecting hole (13) along an axial direction perpendicular to the first movable hole (11); the first connecting hole (13) is connected to the first movable hole (11); the damping member (53) is inserted into the first connecting hole (13) and abuts against the connecting shaft (51).
3. The extension arm mechanism according to claim 2, characterized in that: The second operating arm (30) is provided with a second connecting hole (33) along an axial direction perpendicular to the second movable hole (31); the second connecting hole (33) is connected to the second movable hole (31); the damping member (53) is inserted into the second connecting hole (33) and abuts against the connecting shaft (51).
4. The extension arm mechanism according to claim 3, characterized in that: The number of the damping members (53) is four, the number of the first connection holes (13) is two, the two first connection holes (13) are arranged opposite to each other, wherein two of the damping members (53) are respectively inserted into the two first connection holes (13), the number of the second connection holes (33) is two, the two second connection holes (33) are arranged opposite to each other, and the other two of the damping members (53) are respectively inserted into the two second connection holes (33).
5. The extension arm mechanism according to claim 4, characterized in that: A limit block (511) is radially protruded from one end of the connecting shaft (51), and the diameter of the limit block (511) is larger than the first connecting hole (13) and the second connecting hole. The fastener (52) is connected to the other end of the connecting shaft (51) and abuts against the first operating arm (10) or the second operating arm (30).
6. The extension arm mechanism according to claim 5, characterized in that: The connecting assembly (50) further comprises a retaining ring (54); the connecting shaft (51) is located on an outer wall of the fastener (52) away from the first operating arm (10) or the second operating arm (30) and is provided with a clamping groove; the retaining ring (54) is clamped in the clamping groove and abuts against the fastener (52).
7. The extension arm mechanism according to any one of claims 1 to 6, characterized in that: The connection assembly (50) further comprises a gasket (55), wherein the gasket (55) is sleeved on the connection shaft (51) and is located between the first operating arm (10) and the second operating arm (30).
8. The extension arm mechanism according to claim 7, characterized in that: The extension arm mechanism also includes a fixed seat (60) and a rotating shaft (70); one end of the first operating arm (10) is connected to the fixed seat (60); the rotating shaft (70) is movably arranged through one end of the first operating arm (10) and the fixed seat (60); and the damping member (53) is arranged through one end of the first operating arm (10) and abuts against the fixed seat (60).
9. The extension arm mechanism according to any one of claims 3 to 6, characterized in that: The connecting assembly (50) further comprises an end cover (56), wherein the end cover (56) covers an opening of the first movable hole (11) and / or the second movable hole (31) away from the connecting shaft (51).
10. A medical suspension bridge, characterized in that: Comprising the extension arm mechanism as claimed in any one of claims 1 to 9.