Spring arm

Abstract

The utility model is applicable to the technical field of medical equipment, and provides a spring arm which comprises a mounting seat, a supporting tube and an elastic mechanism arranged in the supporting tube, the mounting base is hinged to the supporting pipe, a boss is arranged on the inner wall of the supporting pipe, and a limiting structure is arranged on the supporting pipe; the elastic mechanism comprises a connecting rod, a first spring seat, a positioning seat, a spring, a second spring seat and an adjusting piece, the connecting rod is sequentially sleeved with the first spring seat, the positioning seat, the spring, the second spring seat and the adjusting piece, the first spring seat and the second spring seat are fixedly connected with the connecting rod, the boss is arranged between the first spring seat and the positioning seat, and the distance between the first spring seat and the second spring seat is smaller than the original length of the spring; the elastic mechanism further comprises a connecting piece, and the two ends of the connecting piece are hinged to the mounting base and the first spring base correspondingly. The connecting rod is in threaded connection with the adjusting piece, and a limiting flange is arranged on the adjusting piece; a limiting structure is arranged on the supporting pipe and abuts against the limiting turned-over edge. The adjusting piece is screwed so that the supporting rod can be stressed in a balanced mode, and automatic rotation cannot happen.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a spring arm. Background Art

[0002] Spring arms are a common suspension device in the medical industry, usually used to suspend various equipment such as lighting, imaging devices, catheters, etc.

[0003] The spring arm includes a support tube and a spring mechanism arranged in the support tube. When the spring arm is in use, the rotation angle of the support tube is different, which causes different compression amounts of the spring and changes in the spring elastic force, making it impossible to hover at any angle. The force on the support tube is unbalanced, and the support tube keeps swinging upward. Utility Model Content

[0004] The utility model provides a spring arm, aiming to solve the problem that a support tube cannot be suspended at any angle and always swings upward.

[0005] The utility model is implemented as follows: a spring arm comprises a mounting seat, a support tube and an elastic mechanism arranged in the support tube;

[0006] The mounting seat is hinged to the support tube, a boss is arranged on the inner wall of the support tube, and a limiting structure is arranged on the support tube;

[0007] The elastic mechanism includes a connecting rod, and a first spring seat, a positioning seat, a spring, a second spring seat and an adjusting member which are sequentially sleeved on the connecting rod, the first spring seat and the second spring seat are fixedly connected to the connecting rod, the boss is placed between the first spring seat and the positioning seat, wherein the distance between the first spring seat and the second spring seat is less than the original length of the spring;

[0008] The elastic mechanism further comprises a connecting member, two ends of which are respectively hinged to the mounting seat and the first spring seat;

[0009] The connecting rod is threadedly connected to the adjusting member, a limiting flange is arranged on the adjusting member, and the limiting flange abuts against the limiting structure.

[0010] In some embodiments, the limiting structure includes: at least one group of waist-shaped holes is arranged on the support tube along the axial direction of the support tube, a group of waist-shaped holes is arranged opposite to each other on the side wall of the support tube, and a safety pin is arranged in the waist-shaped hole and can slide along the waist-shaped hole;

[0011] The safety pin is disposed on a side of the limiting flange away from the spring and abuts against the limiting flange.

[0012] In some embodiments, a wrench head is provided on an end of the adjusting member away from the spring.

[0013] In some embodiments, the wrench head includes a head seat and an inner hexagonal groove arranged on the head seat, and the circumscribed circle of the head seat is smaller than the inner diameter of the support tube.

[0014] In some embodiments, a friction ring is sleeved on the first spring seat, the friction ring is matched with the support tube, and the friction ring is fixedly connected to the first spring seat.

[0015] In some embodiments, the first spring seat is provided with a positioning ring groove, and the friction ring is provided in the positioning ring groove.

[0016] In some embodiments, a friction ring is sleeved on the second spring seat, the friction ring is matched with the support tube, and the friction ring is fixedly connected to the second spring seat.

[0017] In some embodiments, the second spring seat is provided with a positioning ring groove, and the friction ring is provided in the positioning ring groove.

[0018] In some embodiments, a plurality of grooves are arranged on the outer wall of the friction ring along the axial direction of the friction ring.

[0019] In some embodiments, the connecting member is an arc-shaped member.

[0020] The beneficial effect achieved by the utility model is that the boss, the positioning seat, the spring, the second mounting seat, the adjusting member and the limiting structure are abutted in sequence, the first mounting seat is hinged to the support tube, the connecting member is connected to the mounting seat, and the adjusting member is screwed to change the position of the second spring seat arranged in the support tube relative to the mounting seat, thereby adjusting the compression amount of the spring. The compression amounts of the spring between the positioning seat and the second spring seat are different, and the spring force changes with the change of the spring compression amount, so that the support rod is balanced in force and does not rotate autonomously. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a disassembled schematic diagram of the spring arm provided by the utility model;

[0022] Figure 2 It is a full cross-sectional schematic diagram of the spring arm provided by the utility model;

[0023] Figure 3 It is an enlarged view of the spring arm provided by the utility model in the direction of A;

[0024] Figure 4 The utility model is a schematic diagram of the structure of a matching spanner of a spring arm.

[0025] Description of reference numerals:

[0026] 100, spring arm; 101, mounting seat; 102, support tube; 1021, boss; 103, elastic mechanism; 1031, spring; 1032, first spring seat; 1033, second spring seat; 1034, connecting piece; 1035, connecting rod; 1036, adjusting piece; 1037, positioning seat; 1038, limiting flange; 104, waist-shaped hole; 105, safety pin;

[0027] 200, friction ring;

[0028] 300. Wrench. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present utility model, 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, an electrical connection, or mutual communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0033] The utility model boss, positioning seat, spring, second mounting seat, adjusting member and limiting structure are abutted in sequence, the first mounting seat is hinged to the support tube, the connecting member is connected to the mounting seat, and the adjusting member is screwed to change the position of the second spring seat arranged in the support tube relative to the mounting seat, thereby adjusting the compression amount of the spring, the compression amount of the spring between the positioning seat and the second spring seat is different, and the spring force changes with the change of the spring compression amount, so that the support rod is balanced in force and will not rotate autonomously

[0034] Embodiment 1

[0035] See also Figure 1 , this embodiment provides a spring 1031 arm, including a mounting seat 101, a support tube 102 and an elastic mechanism 103 disposed in the support tube 102;

[0036] The mounting seat 101 is hinged to the support tube 102, a boss 1021 is arranged on the inner wall of the support tube 102, and a limiting structure is arranged on the support tube 102;

[0037] The elastic mechanism 103 includes a connecting rod 1035, and a first spring seat 1032, a positioning seat 1037, a spring 1031, a second spring seat 1033 and an adjusting member 1036 which are sequentially sleeved on the connecting rod 1035. The first spring seat 1032 and the second spring seat 1033 are fixedly connected to the connecting rod 1035, and the boss 1021 is placed between the first spring seat 1032 and the positioning seat 1037, wherein the distance between the first spring seat 1032 and the second spring seat 1033 is less than the original length of the spring 1031.

[0038] The elastic mechanism 103 further includes a connecting seat and a connecting member 1034, and two ends of the connecting member 1034 are respectively hinged to the connecting seat and the first spring seat 1032;

[0039] The connecting seat is connected to the mounting seat 101;

[0040] The connecting rod 1035 is threadedly connected to the adjusting member 1036 . A limiting flange 1039 is provided on the adjusting member 1036 . The limiting flange 1039 abuts against the limiting structure.

[0041] The mounting seat 101 is hinged to the support tube 102 to facilitate adjustment of the angle between the mounting seat 101 and the support tube 102. Usually, the mounting seat 101 is fixed, and the support tube 102 rotates relative to the mounting seat 101 with the hinge point between the mounting seat 101 and the support tube 102 as the rotation center.

[0042] The support tube 102 is a hollow tube with a circular inner wall cross section, and the elastic mechanism 103 is placed in the hollow tube of the support tube 102. The first spring seat 1032 and the second spring seat 1033 are respectively fixedly connected to the connecting rod 1035, and the spring 1031 is placed between the first spring seat 1032 and the second spring seat 1033, and the distance between the first spring seat 1032 and the second spring seat 1033 is less than the original length of the spring 1031, that is, the spring 1031 is in a compressed state.

[0043] A boss 1021 and a limiting structure are provided in the support tube 102. The boss 1021 and the limiting structure are respectively provided at the two ends of the support tube 102. The positioning seat 1037, the spring 1031, the second spring seat 1033 and the adjusting member 1036 are all placed between the boss 1021 and the limiting structure. Specifically, the positioning seat 1037 can be a circular gasket, and the gasket abuts against the spring 1031. The distance from the boss 1021 to the axis of the support tube 102 is less than the radius of the outer diameter of the positioning seat 1037, so that the boss 1021 can form an obstruction to the positioning seat 1037. It can be understood that the distance from the boss 1021 to the axis of the support tube 102 is greater than the radius of the connecting rod 1035 to avoid obstruction to the connecting rod 1035.

[0044] The adjusting member 1036 is threadedly connected to the connecting rod 1035. Specifically, the connecting rod 1035 is provided with a threaded section, the threaded section is provided with an external thread, and the adjusting member 1036 is provided with an internal thread that matches the external thread on the threaded section. The connecting position of the adjusting member 1036 and the connecting rod 1035 can be changed by rotating the adjusting member 1036. The adjusting member 1036 is also provided with a limiting flange 1039, which can be extended outward from the outer wall of the adjusting member 1036. The limiting structure abuts against the adjusting flange to provide a limit for the adjusting member 1036.

[0045] The connecting member 1034 is arranged between the connecting seat and the elastic mechanism 103, one end of the connecting member 1034 is hinged to the connecting seat, and the other end is hinged to the spring 1031. The two ends of the connecting member 1034 are respectively hinged to the connecting seat and the spring 1031, and the angles between the three parts can be adjusted, with a large angle adjustment range and flexible adjustment.

[0046] The connecting seat is connected to the mounting seat 101, and the hinged connecting member 1034 has a large range of motion, and the hinge angles at both ends of the connecting member 1034 can be adjusted separately, so that the elastic mechanism 103 can make autonomous adaptive adjustments in the support tube 102 following the rotation of the support tube 102, thereby avoiding damage to the spring 1031 due to the rotation of the support tube 102.

[0047] When the support tube 102 rotates relative to the mounting seat 101, the connecting member 1034 rotates relative to the connecting seat, and the first spring seat 1032 also rotates relative to the connecting member 1034, so that the position of the first spring seat 1032 moves along the axial direction of the support tube 102, and then the position of the second spring seat 1033 is driven by the connecting rod 1035 to move along the axial direction of the support tube 102. Under the drive of the second spring seat 1033, one end of the spring 1031 moves along the axial direction of the support tube 102, but under the joint action of the boss 1021 and the positioning seat 1037, the other end of the spring 1031 does not move along the axial direction of the support tube 102, thereby causing the extension or compression of the spring 1031, the compression amount of the spring 1031 changes, and the elastic force of the spring 1031 changes. The elastic force of the spring 1031 acts on the support tube 102 , and the changed elastic force does not match the weight of the mounted heavy object, so that the force on the support tube 102 is unbalanced, and the support tube 102 rotates autonomously relative to the mounting seat 101 .

[0048] Alternatively, when the weight of the mounted heavy object changes, the force on the support tube 102 becomes unbalanced, and the support tube 102 rotates autonomously relative to the mounting seat 101 .

[0049] The second spring seat 1033 and the connecting rod 1035 are fixedly connected, and the adjusting member 1036 is threadedly connected to the connecting rod 1035. At the same time, the adjusting member 1036 abuts against a fixed limiting structure. By changing the connection position of the adjusting member 1036 and the connecting rod 1035, the distance between the second spring seat 1033 and the adjusting member 1036 can be changed, thereby changing the position of the second spring seat 1033, and then changing the compression amount of the spring 1031 through the second spring seat 1033. The compression amount of the spring 1031 is adjusted so that the elastic force of the spring 1031 matches the weight of the mounted heavy object, thereby balancing the force on the support tube 102, and the support tube 102 can be suspended at any angle to prevent the support tube 102 from rotating autonomously relative to the mounting seat 101.

[0050] In this embodiment, the boss 1021, the positioning seat 1037, the spring 1031, the second mounting seat 101, the adjusting member 1036 and the limiting structure are abutted in sequence, the first mounting seat 101 is hinged to the support tube 102, the connecting member 1034 is connected to the mounting seat 101, and the adjusting member 1036 is screwed to change the position of the second spring seat 1033 arranged in the support tube 102 relative to the mounting seat 101, thereby adjusting the compression amount of the spring 1031. The compression amounts of the spring 1031 between the positioning seat 1037 and the second spring seat 1033 are different, and the elastic force of the spring 1031 changes with the change of the compression amount of the spring 1031, so that the force on the support rod is balanced and no autonomous rotation occurs.

[0051] In one embodiment, the boss 1021 is a ring boss, which can be formed by welding or other methods to set a circle of ring bosses 1021 on the inner wall of the support tube 102, or by pressing the support tube 102 so that the tube wall of the support tube 102 is deformed inward to form a circle of ring bosses 1021. The boss 1021 is in uniform contact with the positioning seat 1037, which is more stable and reliable.

[0052] Embodiment 2

[0053] On the basis of the first embodiment, the limiting structure includes: at least one group of waist-shaped holes 104 are arranged on the support tube 102 along the axial direction of the support tube 102, and one group of waist-shaped holes 104 are arranged opposite to each other on the side wall of the support tube 102, and a safety pin 105 that can slide along the waist-shaped hole 104 is arranged in the waist-shaped hole 104;

[0054] The safety pin 105 is disposed on a side of the limiting flange 1039 away from the spring 1031 and abuts against the limiting flange 1039 .

[0055] At least one group of waist-shaped holes 104 is provided on the support tube 102. The waist-shaped holes 104 are provided on the tube wall of the support tube 102 at one end away from the mounting seat 101. The extending direction of the waist-shaped holes 104 is consistent with the axial direction of the support tube 102. A group of waist-shaped holes 104 is two waist-shaped holes 104, which penetrate from one side of the support tube 102 to the opposite side, and the two waist-shaped holes 104 are arranged oppositely. A safety pin 105 is also provided in a group of waist-shaped holes 104. The two waist-shaped holes 104 limit the safety pin 105 so that the safety pin 105 moves along the extending direction of the waist-shaped holes 104.

[0056] The distance between the safety pin 105 and the axis of the support tube 102 is smaller than the radius of the fixing seat, and the elastic mechanism 103 is arranged between the mounting seat 101 and the safety pin 105. One end of the elastic mechanism 103 is blocked by the mounting seat 101, and the other end is blocked by the safety pin 105, so as to prevent the elastic mechanism 103 from coming out of the support tube 102. When the safety pin 105 in the waist-shaped hole 104 blocks the elastic mechanism 103, the safety pin 105 has a certain amount of movement, which can play a buffering role.

[0057] In one embodiment, two groups of waist-shaped holes 104 are provided, and the two groups of waist-shaped holes 104 are parallel to each other. A safety pin 105 is provided in each of the two groups of waist-shaped holes 104, and the two safety pins 105 are parallel to each other to form a block for the elastic mechanism 103 together.

[0058] Embodiment 3

[0059] Based on the first embodiment, a wrench head is provided on the end of the adjusting member 1036 away from the spring 1031 .

[0060] The top of the plate is used to connect a wrench 300 for screwing the adjusting member 1036, so that the wrench 300 can be inserted into the support tube 102 to screw the adjusting member 1036, which is convenient for operation.

[0061] In one embodiment, the wrench head includes a head seat and an inner hexagonal slot disposed on the head seat, and the circumscribed circle of the head seat is smaller than the inner diameter of the support tube 102. The inner hexagonal slot is used to fit the hexagonal wrench 300.

[0062] In another embodiment, the wrench head is a regular hexagonal prism, which is used to fit the socket wrench 300 with an inner hexagonal shape. It is understood that the outer diameter of the socket wrench 300 needs to be smaller than the inner diameter of the support tube 102 .

[0063] Embodiment 4

[0064] On the basis of the first embodiment, a friction ring 200 is sleeved on the first spring seat 1032 , the friction ring 200 is matched with the support tube 102 , and the friction ring 200 is fixedly connected to the first spring seat 1032 .

[0065] The friction ring 200 is sleeved on the first spring seat 1032 and placed between the spring seat 1031 and the support tube 102. The friction ring 200 and the support tube 102 are in clearance fit, which facilitates the friction ring 200 to slide in the support tube 102. The inner ring wall of the friction ring 200 is fixedly connected to the spring seat 1031. The specific connection method of the friction ring 200 and the spring seat 1031 can be an integrated connection method such as welding and riveting, or a detachable connection method such as snap connection and buckle connection. When the friction ring 200 and the spring seat 1031 are connected, there will be no relative displacement between the friction ring 200 and the spring seat 1031. The outer ring wall of the friction ring 200 abuts against the inner wall of the support tube 102, providing a limit for the spring seat 1031, so that the spring seat 1031 can slide in the support tube 102 without flipping.

[0066] It can be understood that, since the friction ring 200 is sleeved on the spring 1031 seat, it can be known that the outer diameter of the friction ring 200 is greater than the outer diameter of the spring 1031 seat.

[0067] In this embodiment, the friction ring 200 is arranged between the spring 1031 seat and the support ring, and only the friction ring 200 contacts the inner wall of the support tube 102, so the contact area is small and the abnormal noise generated is small. In addition, the spring 1031 seat and the friction ring 200 are fixedly connected, and there will be no relative displacement or friction between the spring 1031 seat and the friction ring 200, so there will be no noise due to friction between the spring 1031 seat and the friction ring 200.

[0068] In one embodiment, a positioning ring groove is provided on the spring 1031 seat, and the friction ring 200 is provided in the positioning ring groove.

[0069] The width of the positioning ring groove matches the width of the friction ring 200 . The friction ring 200 is inserted into the positioning ring groove through the opening. The positioning ring groove provides a limit for the friction ring 200 , so that the friction ring 200 cannot move axially in the positioning ring groove.

[0070] Furthermore, an opening is provided on the friction ring 200 , so that the friction ring 200 is convenient to install and remove, and the friction ring 200 is convenient to replace or repair.

[0071] Embodiment 5

[0072] On the basis of the first embodiment, a friction ring 200 is sleeved on the second spring seat 1033 , the friction ring 200 is matched with the support tube 102 , and the friction ring 200 is fixedly connected to the second spring seat 1033 .

[0073] The beneficial effects obtained in this embodiment are similar to those obtained in the fourth embodiment, and will not be described in detail here.

[0074] Embodiment 6

[0075] On the basis of the fourth embodiment, a plurality of grooves are arranged on the outer wall of the friction ring 200 along the axial direction of the friction ring 200 .

[0076] The groove of the friction ring 200 does not need to contact the inner wall of the support tube 102, which further reduces the contact area between the friction ring 200 and the inner wall of the support tube 102, and further reduces the abnormal noise caused by friction. The reduction of the contact area can reduce the difficulty of processing the friction ring 200 while ensuring the processing accuracy, which is conducive to reducing production costs. Lubricants (such as lubricating oil) can also be filled in the groove to help lubricate and reduce abnormal noises caused by the contact between the friction ring 200 and the inner wall of the support tube 102.

[0077] In one embodiment, the plurality of grooves are evenly distributed along the friction ring 200 .

[0078] The plurality of grooves are evenly distributed along the outer wall of the friction ring 200 axially, so that the friction ring 200 can be in uniform contact with the support tube 102 and receive uniform force, which is beneficial to reducing abnormal noise.

[0079] Embodiment 7

[0080] Based on the first embodiment, the connecting member 1034 is an arc-shaped member.

[0081] The arc-shaped member has better uniformity when subjected to stress, and is less likely to have stress concentration, thereby avoiding damage to the connecting member 1034. Specifically, the connecting member 1034 can be an arc-shaped curved piece, and the two ends of the arc-shaped curved piece are respectively hinged to the mounting seat 101 and the positioning seat 1037 close to the mounting seat 101.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spring arm, characterized in that: It includes a mounting seat, a support tube and an elastic mechanism arranged in the support tube; The mounting seat is hinged to the support tube, a boss is arranged on the inner wall of the support tube, and a limiting structure is arranged on the support tube; The elastic mechanism includes a connecting rod, and a first spring seat, a positioning seat, a spring, a second spring seat and an adjusting member which are sequentially sleeved on the connecting rod, the first spring seat and the second spring seat are fixedly connected to the connecting rod, the boss is placed between the first spring seat and the positioning seat, wherein the distance between the first spring seat and the second spring seat is less than the original length of the spring; The elastic mechanism further comprises a connecting member, two ends of which are respectively hinged to the mounting seat and the first spring seat; The connecting rod is threadedly connected to the adjusting member, a limiting flange is arranged on the adjusting member, and the limiting flange abuts against the limiting structure.

2. The spring arm according to claim 1, characterized in that The limiting structure comprises: at least one group of waist-shaped holes is arranged on the support tube along the axial direction of the support tube, a group of waist-shaped holes is arranged opposite to each other on the side wall of the support tube, and a safety pin is arranged in the waist-shaped hole and can slide along the waist-shaped hole; The safety pin is disposed on a side of the limiting flange away from the spring and abuts against the limiting flange.

3. The spring arm according to claim 1, characterized in that A wrench head is arranged on one end of the adjusting member away from the spring.

4. The spring arm according to claim 3, characterized in that The wrench head comprises a head seat and an inner hexagonal groove arranged on the head seat, and the circumscribed circle of the head seat is smaller than the inner diameter of the support tube.

5. The spring arm according to claim 1, characterized in that A friction ring is sleeved on the first spring seat, the friction ring is matched with the support tube, and the friction ring is fixedly connected to the first spring seat.

6. The spring arm according to claim 5, characterized in that The first spring seat is provided with a positioning ring groove, and the friction ring is arranged in the positioning ring groove.

7. The spring arm according to claim 1, wherein: A friction ring is sleeved on the second spring seat, the friction ring is matched with the support tube, and the friction ring is fixedly connected to the second spring seat.

8. The spring arm according to claim 7, characterized in that The second spring seat is provided with a positioning ring groove, and the friction ring is arranged in the positioning ring groove.

9. The spring arm according to claim 6 or 8, characterized in that A plurality of grooves are arranged on the outer wall of the friction ring along the axial direction of the friction ring.

10. The spring arm according to claim 1, wherein: The connecting piece is an arc-shaped piece.

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