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 seat is connected with the supporting pipe; a boss is arranged on the inner wall of the supporting pipe; the elastic mechanism comprises a connecting rod, a first spring seat, a positioning seat, a spring and a second spring seat, the connecting rod is sequentially sleeved with the first spring seat, the positioning seat, the spring and the second spring seat, the first spring seat and the second spring seat are fixedly connected with the connecting rod, and the boss is arranged between the first spring seat and the positioning seat. The elastic mechanism further comprises a connecting base and a connecting piece. The two ends of the connecting piece are hinged to the connecting base and the first spring base respectively. A limiting through hole and an adjusting threaded hole are adjacently formed in the connecting seat; a limiting pin is arranged in the limiting through hole and is in clearance fit with the limiting through hole; a force adjusting screw is arranged in the adjusting threaded hole and comprises a threaded section and a limiting section, the limiting section is connected with the mounting base through an axial limiting piece, and the threaded section is in threaded connection with the adjusting threaded hole.

Description

Technical Field

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

[0002] A spring arm is a common suspension device in the medical industry, usually used for suspending various devices, such as lighting lamps, imaging devices, catheters, etc.

[0003] The spring arm includes a support tube and a spring mechanism arranged in the support tube. During the use of the spring arm, due to the different weights of the suspended heavy objects, it is difficult to adjust the spring compression amount, and thus the elastic force of the spring cannot be changed, making the spring arm unable to match and suspend heavy objects of different weights, which limits the versatility of the spring arm. Summary of the Utility Model

[0004] The utility model provides a spring arm, aiming to solve the problem that the spring arm cannot match and suspend heavy objects of different weights and has poor versatility.

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

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

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

[0008] The elastic force mechanism further includes a connecting seat and a connecting member. Two ends of the connecting member are respectively hinged to the connecting seat and the first spring seat;

[0009] A limit through hole and an adjustment threaded hole are adjacently arranged on the connecting seat;

[0010] A limit pin is arranged in the limit through hole. The limit pin is in clearance fit with the limit through hole, and the connecting seat is connected to the mounting seat through the limit pin. The limit pin is in interference fit with the mounting seat;

[0011] An adjusting screw is arranged in the adjustment threaded hole. The adjusting screw includes a threaded section and a limit section. The limit section is connected to the mounting seat through an axial limiting member, and the threaded section is in threaded connection with the adjustment threaded hole.

[0012] In some embodiments, the boss is an annular platform.

[0013] In some embodiments, the connecting member is an arc-shaped member.

[0014] In some embodiments, the mounting seat is hinged to the support tube.

[0015] In some embodiments, a threaded section is provided on a section of the connecting rod close to the second spring seat, and the connecting rod is threadedly connected to the second spring seat.

[0016] In some embodiments, the threaded section partially passes through the second spring seat. The limiting structure includes an abutting portion and an avoidance cavity. The abutting portion abuts against the second spring seat, and an internal thread adapted to the external thread of the threaded section is provided in the avoidance cavity.

[0017] In some embodiments, a friction ring is sleeved on the first spring seat. The friction ring is adapted to the support tube and is fixedly connected to the first spring seat.

[0018] In some embodiments, a friction ring is sleeved on the second spring seat. The friction ring is adapted to the support tube and is fixedly connected to the second spring seat.

[0019] In some embodiments, the axial limiting member is a snap ring.

[0020] In some embodiments, the convex platform is formed by inward depression of the tube wall of the support tube.

[0021] The beneficial effects achieved by the present utility model are as follows: Since the convex platform, the positioning seat, the spring and the second mounting seat are abutted in sequence, the first mounting seat is hinged to the support tube, and the connecting seat is connected to the mounting seat, the position of the second spring seat provided in the support tube can make an independent adaptive adjustment following the change of the position of the connecting seat relative to the mounting seat. Moreover, the convex platform and the positioning seat obstruct one end of the spring, making the position of one end of the spring seat unchangeable, and the other end of the spring changes following the change of the position of the second spring 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 following the change of the spring compression amount to provide different magnitudes of spring forces to match different weights of the suspended heavy objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an exploded view of the spring arm provided by the present utility model;

[0023] Figure 2 is a full-sectional view of the spring arm provided by the present utility model;

[0024] Figure 3 is an enlarged view in the direction A of the spring arm provided by the present utility model;

[0025] Figure 4 It is an enlarged view of the spring arm provided by the present utility model in the B direction.

[0026] Description of the reference numerals in the drawings:

[0027] 100. Spring arm; 101. Mounting seat; 102. Support tube; 1021. Boss; 103. Elastic mechanism; 1031. Spring; 1032. First spring seat; 1033. Connecting rod; 1034. Connecting piece; 1035. Connecting seat; 1036. Second spring seat; 1037. Positioning seat; 104. Limit pin; 105. Force-adjusting screw; 106. Axial limiting member; 107. Limiting structure;

[0028] 110. Friction ring. Specific embodiments

[0029] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 a connection that allows mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific 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.

[0034] In the present utility model, the boss, the positioning seat, the spring, and the second mounting seat are sequentially abutted. The first mounting seat is hinged to the support tube, and the connecting seat is connected to the mounting seat, so that the position of the second spring seat provided in the support tube can make an autonomous adaptive adjustment following the change of the position of the connecting seat relative to the mounting seat. Moreover, the boss and the positioning seat impede one end of the spring, making the position of one end of the spring seat unchangeable, and the other end of the spring changes following the change of the position of the second spring 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 following the change of the spring compression amount to provide different magnitudes of spring force to match different weights of the mounted heavy objects.

[0035] Embodiment 1

[0036] As Figures 1 to 4 shown, this embodiment provides a spring 1031 arm 100, including: a mounting seat 101, a support tube 102, and an elastic mechanism 103 provided in the support tube 102;

[0037] The mounting seat 101 is hinged to the support tube 102. A boss 1021 is provided on the inner wall of the support tube 102, and a limiting structure 107 is provided on the support tube 102;

[0038] The elastic mechanism 103 includes a connecting rod 1033, and a first spring seat 1032, a positioning seat 1037, a spring 1031, and a second spring seat 1036 that are sequentially sleeved on the connecting rod 1033. The first spring seat 1032 and the second spring seat 1036 are fixedly connected to the connecting rod 1033. The boss 1021 is placed between the first spring seat 1032 and the positioning seat 1037. The elastic mechanism 103 further includes a connecting seat 1035 and a connecting member 1034. The two ends of the connecting member 1034 are respectively hinged to the connecting seat 1035 and the first spring seat 1032. The second spring seat 1036 abuts against the limiting structure 107;

[0039] Wherein, the distance between the first spring seat 1032 and the second spring seat 1036 is less than the original length of the spring 1031;

[0040] A limiting through hole and an adjusting threaded hole are adjacently arranged on the connecting seat 1035;

[0041] A limiting pin 104 is arranged in the limiting through hole. The limiting pin 104 has a clearance fit with the limiting through hole, and the connecting seat 1035 is connected to the mounting seat 101 through the limiting pin 104. The limiting pin 104 has an interference fit with the mounting seat 101;

[0042] An adjusting screw 105 is arranged in the adjusting threaded hole. The adjusting screw 105 includes a threaded section and a limiting section. The limiting section is connected to the mounting seat 101 through an axial limiting member 106, and the threaded section is threadedly connected to the adjusting threaded hole.

[0043] The support tube 102 is a hollow pipe with a circular inner wall cross-section. The elastic mechanism 103 is placed in the hollow pipe of the support tube 102. The first spring seat 1032 and the second spring seat 1036 are respectively fixedly connected to the connecting rod 1033. The spring 1031 is placed between the first spring seat 1032 and the second spring seat 1036, and the distance between the first spring seat 1032 and the second spring seat 1036 is less than the original length of the spring 1031, that is, the spring 1031 is in a compressed state.

[0044] A boss 1021 and a positioning seat 1037 are further arranged between the first spring seat 1032 and the spring 1031. 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 1033 to avoid obstructing the connecting rod 1033.

[0045] The connecting member 1034 is disposed between the connecting seat 1035 and the elastic mechanism 103. One end of the connecting member 1034 is hinged to the connecting seat 1035, 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 1035 and the spring 1031, and the angles between the three components can be adjusted. The angle adjustment range is large and the adjustment is flexible.

[0046] The connecting seat 1035 is connected to the mounting seat 101, and the movable range of the hinged connecting member 1034 is large. The hinged angles at both ends of the connecting member 1034 can be adjusted respectively, which is convenient for the elastic mechanism 103 to make autonomous adaptive adjustments in the support tube 102 following the rotation of the support tube 102, and avoid damaging the spring 1031 due to the rotation of the support tube 102.

[0047] The limiting through hole and the adjusting threaded hole are adjacently arranged on the connecting seat 1035, and the axes of the limiting through hole and the adjusting limiting hole are parallel to each other. A limiting pin 104 is arranged in the limiting through hole. The limiting pin 104 is in clearance fit with the limiting through hole, and the limiting pin 104 passes through the limiting through hole and is connected to the mounting seat 101. The limiting pin 104 provides limitation for the connecting seat 1035, so that the connecting seat 1035 can move along the axial direction of the limiting pin 104 and cannot move along the radial direction of the limiting pin 104.

[0048] An adjusting screw 105 is arranged in the adjusting threaded hole. The adjusting screw 105 includes a threaded section and a limiting section. An external thread is arranged on the threaded section, which is adapted to the internal thread of the adjusting threaded hole. The limiting section passes through the adjusting threaded hole and is connected to the mounting seat 101 through an axial limiting member 106. The axial limiting member 106 can specifically be a bearing, a circlip, or other structures commonly used for axial limitation, so that the adjusting screw can rotate circumferentially relative to the mounting seat 101 and cannot move axially.

[0049] It can be understood that the two juxtaposed hole positions prevent the connecting seat 1035 from rotating relative to the axis of any hole position. When the adjusting screw 105 is screwed, the threaded meshing position between the adjusting screw 105 and the connecting seat 1035 is changed, and the connecting seat 1035 is displaced axially relative to the adjusting screw 105. However, the adjusting screw 105 cannot be displaced axially relative to the mounting seat 101. Therefore, the mounting position of the connecting seat 1035 on the mounting seat 101 changes along the axial direction of the adjusting screw 105.

[0050] When the support tube 102 does not rotate relative to the mounting seat 101, the relative position of the connecting seat 1035 and the mounting seat 101 changes, so that the connecting member 1034 rotates relative to the connecting seat 1035, 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 1036 is driven by the connecting rod 1033 to move along the axial direction of the support tube 102. Under the drive of the second spring seat 1036, 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, and the compression amount of the spring 1031 changes, which changes the elastic force of the spring 1031 to match the mounted weights of different weights.

[0051] In this embodiment, the boss 1021, the positioning seat 1037, the spring 1031 and the second mounting seat 101 are abutted in sequence, the first mounting seat 101 is hinged to the support tube 102, and the connecting seat 1035 is connected to the mounting seat 101, so that the position of the second spring seat 1036 arranged in the support tube 102 can be autonomously adaptively adjusted by following the change in the position of the connecting seat 1035 relative to the mounting seat 101, and the boss 1021 and the positioning seat 1037 cause obstruction to one end of the spring 1031, so that the position of one end of the spring 1031 seat cannot be changed, and the other end of the spring 1031 changes with the position change of the second spring seat 1036, thereby adjusting the compression amount of the spring 1031, and the compression amount of the spring 1031 between the positioning seat 1037 and the second spring seat 1036 is different, and the elastic force of the spring 1031 changes with the change in the compression amount of the spring 1031, so as to provide different sizes of elastic force to match the mounted objects of different weights.

[0052] Specifically, the boss 1021 may be a ring boss, and specifically, a ring boss 1021 may be provided on the inner wall of the support tube 102 by welding or other methods, or the support tube 102 may be compressed so that the tube wall of the support tube 102 is deformed inwardly to form a ring boss 1021. The boss 1021 is in uniform contact with the positioning seat 1037, which is more stable and reliable.

[0053] Specifically, the connecting member 1034 may be an arc-shaped member. The arc-shaped member has better uniformity when subjected to force, is less likely to have stress concentration, and avoids damage to the connecting member 1034. Specifically, the connecting member 1034 may be an arc-shaped curved piece, and the two ends of the arc-shaped curved piece are respectively hinged to the connecting seat 1035 and the positioning seat 1037 close to the mounting seat 101.

[0054] Embodiment 2

[0055] Based on Embodiment 1, the mounting seat 101 is hinged to the support tube 102.

[0056] The mounting seat 101 is hinged to the support tube 102, which facilitates adjusting 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.

[0057] Embodiment 3

[0058] Based on Embodiment 1, a threaded section is provided on a section of the connecting rod 1033 close to the second spring seat 1036, and the connecting rod 1033 is threadedly connected to the second spring seat 1036.

[0059] The second spring seat 1036 is threadedly connected to the connecting rod 1033, and the distance between the first mounting seat 101 and the second mounting seat 101 can be changed by adjusting the threaded connection position between the spring 1031 seat and the connecting rod 1033, thereby adjusting the compression amount of the thread. Moreover, the thread is convenient for disassembly, and when the second spring seat 1036 is damaged, it is easy to replace.

[0060] Embodiment 4

[0061] Based on Embodiment 1, the threaded section partially passes through the second spring seat 1036. The limiting structure 107 includes an abutting portion and an avoidance cavity. The abutting portion abuts against the second spring seat 1036, and internal threads adapted to the external threads of the threaded section are provided in the avoidance cavity.

[0062] The limiting structure 107 includes an abutting portion and an avoidance cavity. Internal threads are provided in the avoidance cavity and are threadedly connected to the connecting rod 1033, and the position of the limiting structure 107 is fixed through the connecting rod 1033. The abutting portion abuts against the second spring seat 1036 to provide limitation to the second spring seat 1036.

[0063] Embodiment 5

[0064] Based on Embodiment 1, a friction ring 110 is sleeved on the first spring seat 1032. The friction ring 110 is adapted to the support tube 102 and is fixedly connected to the first spring seat 1032.

[0065] The friction ring 110 is sleeved on the first spring seat 1032, placed between the first spring seat 1032 and the support tube 102. The friction ring 110 is in clearance fit with the support tube 102, facilitating the sliding of the friction ring 110 within the support tube 102. The inner ring wall of the friction ring 110 is fixedly connected to the first spring seat 1032. The specific connection manner between the friction ring 110 and the first spring seat 1032 can be an integral connection manner such as welding or riveting, or a detachable connection manner such as clamping or buckling. After the connection between the friction ring 110 and the first spring seat 1032 is completed, there will be no relative displacement between the friction ring 110 and the first spring seat 1032. The outer ring wall of the friction ring 110 abuts against the inner wall of the support tube 102, providing a limit for the first spring seat 1032, enabling the first spring seat 1032 to slide within the support tube 102 without flipping.

[0066] It can be understood that since the friction ring 110 is sleeved on the first spring seat 1032, it can be known that the outer diameter of the friction ring 110 is larger than the outer diameter of the first spring seat 1032.

[0067] Embodiment Six

[0068] Based on Embodiment One, a friction ring 110 is sleeved on the second spring seat 1036. The friction ring 110 is adapted to the support tube 102, and the friction ring 110 is fixedly connected to the second spring seat 1036.

[0069] The beneficial effects of this embodiment are similar to those of Embodiment Five and will not be elaborated here.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spring arm, characterized in that: include: A mounting seat, a support tube, and an elastic mechanism disposed in the support tube; The mounting seat is connected to the support tube, and a boss is arranged on the inner wall of the support tube; The elastic mechanism includes a connecting rod, and a first spring seat, a positioning seat, a spring, and a second spring seat 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 seat and a connecting member, and two ends of the connecting member are respectively hinged to the connecting seat and the first spring seat; The connection seat is provided with a limit through hole and an adjustment threaded hole adjacent to each other; A limiting pin is arranged in the limiting through hole, the limiting pin is in clearance fit with the limiting through hole, and the connecting seat is connected with the mounting seat through the limiting pin, and the limiting pin is in interference fit with the mounting seat; A force adjusting screw is arranged in the adjusting threaded hole. The force adjusting screw comprises a threaded section and a limiting section. The limiting section is connected to the mounting seat through an axial limiting member, and the threaded section is threadedly connected to the adjusting threaded hole.

2. The spring arm according to claim 1, characterized in that The boss is a ring boss.

3. The spring arm according to claim 1, characterized in that The connecting piece is an arc-shaped piece.

4. The spring arm according to claim 1, wherein: The mounting seat is hinged to the supporting tube.

5. The spring arm according to claim 1 or 4, characterized in that A threaded section is provided on a section of the connecting rod close to the second spring seat, and the connecting rod is threadedly connected to the second spring seat.

6. The spring arm according to claim 5, characterized in that A limiting structure is provided on the support tube, the second spring seat abuts against the limiting structure, the threaded section partially passes through the second spring seat, the limiting structure includes an abutting portion and an avoidance cavity, the abutting portion abuts against the second spring seat, and an internal thread that matches the external thread of the threaded section is provided in the avoidance cavity.

7. The spring arm according to claim 1, wherein: 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.

8. 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.

9. The spring arm according to claim 1, wherein: The axial limiting member is a retaining spring.

10. The spring arm according to claim 1, wherein: The boss is formed by the inward depression of the tube wall of the support tube.

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