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; the elastic mechanism comprises a spring, spring seats arranged at the two ends of the spring respectively and friction rings arranged on the two spring seats in a sleeving mode respectively, the friction rings are matched with the supporting pipe, and the friction rings are fixedly connected with the spring seats. Only the friction ring is in contact with the inner wall of the supporting pipe, the contact area is small, and generated abnormal sound is small. And relative displacement and friction between the spring seat and the friction ring are avoided, so that noise caused by friction between the spring seat and the friction ring is avoided.

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 to suspend 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 use, the spring arm swings up and down, and the spring mechanism moves axially along the support tube in the support tube. The spring mechanism rubs against the inner surface of the support tube, generating abnormal noises, and the long-term friction will cause damage to the spring mechanism, resulting in high replacement costs. Summary of the Utility Model

[0004] The utility model provides a spring arm, aiming to solve the problem that the spring mechanism rubs against the inner surface of the support tube, generating abnormal noises.

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

[0006] The mounting seat is connected to the support tube;

[0007] The elastic mechanism includes a spring, spring seats respectively arranged at both ends of the spring, and friction rings respectively sleeved on the two spring seats. The friction rings are adapted to the support tube, and the friction rings are fixedly connected to the spring seats.

[0008] In some embodiments, a positioning ring groove is arranged on the spring seat, an opening is arranged on the friction ring, and the friction ring is arranged in the positioning ring groove.

[0009] In some embodiments, the spring seat and the friction ring are integrally designed.

[0010] 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.

[0011] In some embodiments, the plurality of grooves are evenly distributed along the friction ring.

[0012] In some embodiments, at least one group of kidney-shaped holes is arranged on the tube wall of the support tube far from the mounting seat along the axial direction of the support tube. The group of kidney-shaped holes includes two kidney-shaped holes oppositely arranged on the tube wall. A safety pin that can slide along the kidney-shaped holes is arranged in the group of kidney-shaped holes.

[0013] In some embodiments, the mounting seat is hinged to the support tube;

[0014] The elastic mechanism further includes a connecting member, and two ends of the connecting member are respectively hinged to the mounting seat and the spring seat close to the mounting seat.

[0015] In some embodiments, the mounting seat is hinged to the support tube;

[0016] The elastic mechanism further includes a connecting seat and a connecting member, and two ends of the connecting member are respectively hinged to the connecting seat and the spring seat close to the mounting seat;

[0017] The connecting seat is connected to the mounting seat.

[0018] In some embodiments, the connecting member is an arc-shaped member.

[0019] In some embodiments, a limiting through hole and an adjusting threaded hole are adjacently arranged on the connecting seat;

[0020] A limiting pin is arranged in the limiting through hole, and the limiting pin is in clearance fit with the limiting through hole. The connecting seat is connected to the mounting seat through the limiting pin, and the limiting pin is in interference fit with the mounting seat;

[0021] An adjusting screw is arranged in the adjusting threaded hole. The adjusting screw includes 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 in threaded connection with the adjusting threaded hole.

[0022] The beneficial effects achieved by the present utility model are as follows. Since the friction ring is arranged between the spring seat and the support tube, only the friction ring contacts the inner wall of the support tube, the contact area is small, and the abnormal noise generated is small. Moreover, the spring seat is fixedly connected to the friction ring, and there is no relative displacement between the spring seat and the friction ring, and no friction occurs. Therefore, no sound is generated between the spring seat and the friction ring due to friction. Description of the Drawings

[0023] Figure 1 is a split schematic diagram of the spring arm provided by the present utility model;

[0024] Figure 2 is a full-sectional schematic diagram of the spring arm provided by the present utility model;

[0025] Figure 3 is an enlarged view in the A direction of the spring arm provided by the present utility model;

[0026] Figure 4 is a structural schematic diagram of the supporting wrench of the spring arm provided by the present utility model;

[0027] Figure 5 is a partial structural schematic diagram of the spring arm provided by the present utility model.

[0028] Description of the Reference Numerals:

[0029] 100. Spring arm; 101. Mounting seat; 102. Support pipe; 103. Elastic mechanism; 1031. Spring; 1032. Spring seat; 1033. Friction ring; 1034. Connecting piece; 1035. Connecting seat; 104. Waist-shaped hole; 105. Safety pin; 106. Link rod;

[0030] 201. Limit pin; 202. Force-adjusting screw; 203. Axial limiting part;

[0031] 300. Wrench. Detailed implementation manner

[0032] 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 in conjunction with the accompanying drawings and embodiments. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent 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 accompanying 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.

[0033] In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "mounting", "connecting" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a communication connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. 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.

[0035] In the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] 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, 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 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.

[0037] In the present utility model, the friction ring is arranged between the spring seat and the support tube. Only the friction ring contacts the inner wall of the support tube, the contact area is small, and the abnormal noise generated is small. Moreover, the spring seat is fixedly connected to the friction ring, and there is no relative displacement between the spring seat and the friction ring, so there is no friction, and thus no sound is generated between the spring seat and the friction ring due to friction.

[0038] Embodiment 1

[0039] As Figures 1 to 3 shown, this embodiment provides a spring arm 100, which includes a mounting seat 101, a support tube 102, and an elastic mechanism 103 arranged inside the support tube 102;

[0040] The mounting seat 101 is connected to the support tube 102;

[0041] The elastic mechanism 103 includes a spring 1031 and positioning members respectively arranged at both ends of the spring 1031. The outer diameter of the spring 1031 is smaller than the inner diameter of the support tube 102. The positioning members include a spring seat 1032 and a friction ring 1033. The spring seat 1032 is connected to the spring 1031, and the spring seat 1032 is in clearance fit with the support tube 102. A friction ring 1033 is sleeved on the spring seat 1032, and the friction ring 1033 is fixedly connected to the spring seat 1032, and the friction ring 1033 contacts the inner wall of the support tube 102.

[0042] The support tube 102 is a hollow pipe with a circular cross-section of the inner wall. One end of the support tube 102 is connected to the mounting seat 101. The elastic mechanism 103 is arranged inside the support tube 102. The support tube 102 provides limit and guidance for the elastic mechanism 103, and the elastic mechanism 103 can move axially along the support tube 102.

[0043] Since the spring 1031 realizes its functions relying on the particularity of its own shape, the volume of the spring 1031 itself is small, and it is not easy to connect with other parts. The spring seat 1032 is used to help the spring 1031 connect with other parts, and to provide support and limit for the spring 1031. One end of the spring seat 1032 is used to fix the spring 1031, and a connection structure can be set at the other end for easy connection with other parts. Specifically, one end of the spring seat 1032 for fixing the spring 1031 can be provided with a contact plane for abutting against the spring 1031 to provide axial limit for the spring 1031, or a clamping position or a groove can be set to provide radial limit while providing axial limit for the spring 1031 to ensure the installation position of the spring 1031 and the spring seat 1032.

[0044] The friction ring 1033 is sleeved on the spring seat 1032 and placed between the spring seat 1032 and the support tube 102. The friction ring 1033 is in clearance fit with the support tube 102 to facilitate the sliding of the friction ring 1033 in the support tube 102. The inner wall of the inner ring of the friction ring 1033 is fixedly connected to the spring seat 1032. The specific connection method between the friction ring 1033 and the spring seat 1032 can be an integral connection method such as welding and riveting, or a detachable connection method such as clamping and buckling. After the friction ring 1033 and the spring seat 1032 are connected, there will be no relative displacement between the friction ring 1033 and the spring seat 1032. The outer wall of the outer ring of the friction ring 1033 abuts against the inner wall of the support tube 102 to provide a limit for the spring seat 1032, so that the spring seat 1032 can slide in the support tube 102 without flipping.

[0045] It can be understood that since the friction ring 1033 is sleeved on the spring seat 1032, it can be known that the outer diameter of the friction ring 1033 is larger than the outer diameter of the spring seat 1032.

[0046] In this embodiment, the friction ring 1033 is arranged between the spring seat 1032 and the support tube. Only the friction ring 1033 contacts the inner wall of the support tube 102, the contact area is small, and the abnormal noise generated is small. And the spring seat 1032 is fixedly connected to the friction ring 1033, and there will be no relative displacement between the spring seat 1032 and the friction ring 1033, and no friction will occur. Therefore, no sound will be generated between the spring seat 1032 and the friction ring 1033 due to friction.

[0047] As Figure 4 shown, in one embodiment, the spring seats 1032 are fixed at both ends of the connecting rod 106, and the connecting rod 106 provides a limit for the spring seats 1032. The spring seats 1032 and the connecting rod 106 can be specifically thread-connected. The relative position between the two spring seats 1032 can be adjusted by screwing the spring seat 1032 with a deep wrench 300, so as to adjust the compression length of the spring 1031 and change the elastic force of the spring 1031.

[0048] Example Two

[0049] As Figure 3 shown, on the basis of Example One, a positioning ring groove is provided on the spring seat 1032, an opening is provided on the friction ring 1033, and the friction ring 1033 is arranged in the positioning ring groove.

[0050] The groove width of the positioning ring groove is adapted to the width of the friction ring 1033. The friction ring 1033 is snapped into the positioning ring groove through the opening. The positioning ring groove provides a limit for the friction ring 1033, so that the friction ring 1033 cannot move axially in the positioning ring groove.

[0051] In this embodiment, the friction ring 1033 is convenient to install and remove, which is convenient for replacing or overhauling the friction ring 1033.

[0052] Example Three

[0053] On the basis of Example One, the spring seat 1032 and the friction ring 1033 are integrally designed.

[0054] The integral design of the spring seat 1032 and the friction ring 1033 can specifically be an inseparable connection into one body by means such as welding, bonding, riveting, etc., or can also be integrally processed from one piece of material. There is no seam between the spring seat 1032 and the friction ring 1033, the connection is stable, it can withstand greater external forces, and the strength is better.

[0055] Example Four

[0056] On the basis of Example One, a plurality of grooves are axially arranged on the outer wall of the friction ring 1033 along the axis of the friction ring 1033.

[0057] The grooves of the friction ring 1033 do not need to contact the inner wall of the support tube 102, which further reduces the contact area between the friction ring 1033 and the inner wall of the support tube 102, and further reduces the abnormal noise generated by friction. And the reduction of the contact area can reduce the processing difficulty of the friction ring 1033 on the premise of ensuring the processing accuracy, which is beneficial to reducing the production cost. Lubricant (such as lubricating oil) can also be filled in the grooves to help lubricate and reduce the abnormal noise generated by the contact between the friction ring 1033 and the inner wall of the support tube 102.

[0058] Example Five

[0059] On the basis of Example Four, the plurality of grooves are evenly distributed along the friction ring 1033.

[0060] The plurality of grooves are axially and evenly distributed on the outer wall of the friction ring 1033, which can make the friction ring 1033 contact the support tube 102 evenly and be stressed evenly, which is beneficial to reducing abnormal noise.

[0061] Example Six

[0062] As Figure 1 and Figure 2 shown, on the basis of the first embodiment, at least one set of waist-shaped holes 104 is axially provided on the tube wall of the support tube 102 away from the mounting base 101. One set of waist-shaped holes 104 includes two waist-shaped holes 104 oppositely arranged on the tube wall, and a safety pin 105 that can slide along the waist-shaped holes 104 is arranged in one set of waist-shaped holes 104.

[0063] At least one set of waist-shaped holes 104 is provided on the support tube 102. The waist-shaped holes 104 are arranged at one end of the tube wall of the support tube 102 away from the mounting base 101, and the extending direction of the waist-shaped holes 104 is consistent with the axial direction of the support tube 102. One set of waist-shaped holes 104 consists of two waist-shaped holes 104 that penetrate from one side of the support tube 102 to the opposite side, and the two waist-shaped holes 104 are oppositely arranged. A safety pin 105 is simultaneously arranged in one set of waist-shaped holes 104, and 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.

[0064] The distance from the safety pin 105 to the axis of the support tube 102 is less than the radius of the fixed seat. The elastic mechanism 103 is arranged between the mounting base 101 and the safety pin 105. One end of the elastic mechanism 103 is blocked by the mounting base 101, and the other end is blocked by the safety pin 105 to prevent the elastic mechanism 103 from coming out of the support tube 102. And 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.

[0065] In one embodiment, two sets of waist-shaped holes 104 are provided, and the two sets of waist-shaped holes 104 are parallel to each other. One safety pin 105 is arranged in each of the two sets of waist-shaped holes 104, and the two safety pins 105 are parallel to each other and jointly block the elastic mechanism 103.

[0066] Embodiment Seven

[0067] As Figure 2 shown, on the basis of the first embodiment, the mounting base 101 is hinged to the support tube 102;

[0068] The elastic mechanism 103 further includes a connecting member 1034, and both ends of the connecting member 1034 are respectively hinged to the mounting base 101 and the spring seat 1032 close to the mounting base 101.

[0069] The mounting base 101 is hinged to the support tube 102, which is convenient for adjusting the angle between the mounting base 101 and the support tube 102. Usually, the mounting base 101 is fixed, and the support tube 102 rotates relative to the mounting base 101 with the hinge point of the mounting base 101 and the support tube 102 as the rotation center.

[0070] The spring arm 100 further includes a connecting piece 1034, which is disposed between the mounting seat 101 and the elastic mechanism 103, one end of the connecting piece 1034 being hinged to the mounting seat 101, and the other end being hinged to a spring seat 1032 close to the mounting seat 101. The hinged connecting piece 1034 has a large range of motion, and the hinge angles of both ends of the connecting piece 1034 can be adjusted respectively, 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 elastic mechanism 103 due to the rotation of the support tube 102.

[0071] Embodiment 8

[0072] like Figure 5 As shown, based on the first embodiment, the mounting seat 101 is hinged to the support tube 102;

[0073] The spring arm 100 further includes a connecting seat 1035 and a connecting member 1034, and two ends of the connecting member 1034 are respectively hinged to the connecting seat 1035 and a spring seat 1032 close to the mounting seat 101;

[0074] The connecting seat 1035 is connected to the mounting seat 101 .

[0075] 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.

[0076] The spring arm 100 further includes a connection seat 1035 and a connection member 1034, wherein the connection member 1034 is disposed between the connection seat 1035 and the elastic mechanism 103, wherein one end of the connection member 1034 is hinged to the connection seat 1035, and the other end is hinged to a spring seat 1032 close to the mounting seat 101, and the connection seat 1035 is connected to the mounting seat 101. The connection seat 1035 is connected to the mounting seat 101, and the hinged connection member 1034 has a large amount of movement, and the hinge angles of the two ends of the connection 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 elastic mechanism 103 due to the rotation of the support tube 102.

[0077] In one embodiment, the connecting member 1034 is an arc-shaped member, which has better uniformity when subjected to force, is less likely to cause stress concentration, and avoids damage to the connecting member 1034. Specifically, the connecting member 1034 can be an arc-shaped bent piece, and the two ends of the arc-shaped bent piece are respectively hinged to the connecting seat 1035 and the spring seat 1032 close to the mounting seat 101.

[0078] Embodiment 9

[0079] likeFigure 5 As shown in the figure, on the basis of the fifth embodiment, a limit through hole and an adjustment threaded hole are adjacently arranged on the connecting seat 1035;

[0080] 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 1035 is connected to the mounting seat 101 through the limit pin. The limit pin is in interference fit with the mounting seat 101;

[0081] 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 101 through an axial limiting member, and the threaded section is in threaded connection with the adjustment threaded hole.

[0082] The limit through hole and the adjustment threaded hole are adjacently arranged on the connecting seat 1035, and the axes of the limit through hole and the adjustment limit hole are parallel to each other. A limit pin is arranged in the limit through hole. The limit pin is in clearance fit with the limit through hole. The limit pin passes through the limit through hole and is connected to the mounting seat 101. The limit pin provides limit for the connecting seat 1035, so that the connecting seat 1035 can move along the axial direction of the limit pin and cannot move along the radial direction of the limit pin.

[0083] An adjusting screw is arranged in the adjustment threaded hole. The adjusting screw includes a threaded section and a limit section. An external thread is arranged on the threaded section, which is adapted to the internal thread of the adjustment threaded hole. The limit section passes through the adjustment threaded hole and is connected to the mounting seat 101 through an axial limiting member. The axial limiting member can specifically be a bearing, a circlip, or other structures commonly used for axial limiting, so that the adjusting screw can rotate circumferentially relative to the mounting seat 101 and cannot move axially.

[0084] 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 is screwed, the threaded engagement position between the adjusting screw and the connecting seat 1035 changes, and the connecting seat 1035 displaces axially relative to the adjusting screw. However, the adjusting screw cannot displace 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, and further the compression amount of the spring 1031 in the elastic mechanism 103 changes, changing the elastic force of the spring 1031 to match the weights of different hanging heavy objects.

[0085] 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 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 connected to the support tube; The elastic mechanism comprises a spring, spring seats respectively arranged at two ends of the spring and friction rings respectively sleeved on the two spring seats, the friction rings are adapted to the support tube, and the friction rings are fixedly connected to the spring seats.

2. The spring arm according to claim 1, characterized in that A positioning ring groove is arranged on the spring seat, an opening is arranged on the friction ring, and the friction ring is arranged in the positioning ring groove.

3. The spring arm according to claim 1, characterized in that The spring seat and the friction ring are designed in one piece.

4. The spring arm according to claim 1, 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.

5. The spring arm according to claim 4, characterized in that The plurality of grooves are evenly distributed along the friction ring.

6. The spring arm according to claim 1, wherein: At least one group of waist-shaped holes is arranged on the tube wall of the support tube away from the mounting seat along the axial direction of the support tube, and the group of waist-shaped holes includes two waist-shaped holes arranged opposite to each other on the tube wall, and a safety pin that can slide along the waist-shaped holes is arranged in the group of waist-shaped holes.

7. The spring arm according to claim 1, wherein: The mounting seat is hinged to the support tube; The elastic mechanism also includes a connecting member, and two ends of the connecting member are respectively hinged to the mounting seat and the spring seat close to the mounting seat.

8. The spring arm according to claim 1, wherein: The mounting seat is hinged to the support tube; The elastic mechanism also includes a connecting seat and a connecting member, and two ends of the connecting member are respectively hinged to the connecting seat and the spring seat close to the mounting seat; The connecting seat is connected to the mounting seat.

9. The spring arm according to claim 7 or 8, characterized in that The connecting piece is an arc-shaped piece.

10. The spring arm according to claim 8, wherein: 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.

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