A gas spring fulcrum plane adjusting structure for a medical gas spring suspension arm

Abstract

The application discloses a gas spring fulcrum plane adjusting structure for a medical suspension arm, which comprises a base, a sliding block I, a sliding block seat, an adjusting bolt I, a sliding block II, an adjusting bolt II, a suspension arm and a gas spring, the sliding block I is connected to the base in a relative position-adjustable mode through the adjusting bolt I, the sliding block II is connected to the sliding block seat in a relative position-adjustable mode through the adjusting bolt II, the sliding block seat is welded on the sliding block I, the sliding block II is provided with a pin shaft II as a fulcrum of the gas spring, the adjusting bolt I is vertically arranged, and the adjusting bolt II is arranged in an inclined mode with a horizontal plane, so that the position of the gas spring fulcrum can be adjusted in a plane instead of only in a line. The application has the following beneficial technical effects: the position of the gas spring fulcrum can be more accurately adjusted, and the suspension arm can be adapted to a larger load range and a swing angle range.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm. Background Technology

[0002] Medical gas spring suspension arms are typically used in operating rooms to suspend large loads, such as large-screen medical monitors and other medical devices, and to keep them suspended within a certain vertical angle range, such as 20° upwards and 30° downwards. The structure consists of a suspension arm where one end can rotate horizontally or swing vertically around a fixed pivot, and the other end suspends the medical device. A gas spring is hinged near the middle of the arm, and the other end of the gas spring is hinged to a fulcrum near the lower part of the suspension arm's pivot, forming a lever support for the suspension arm. At any angle within the range of rotation of the suspension arm, the load is applied to the arm and transmitted to the end and the gas spring. The supporting force generated by the deformation of the gas spring is applied to the pivot near the middle of the suspension arm. The torque exerted by the gas spring on the suspension arm, along with the torque generated by the system's own weight and friction, balances the torque exerted by the gas spring on the suspension arm, allowing the suspension arm to remain suspended at that angle.

[0003] For a given load and angle range, although calculations can yield combinations of parameters such as suspension arm length, connection point position, gas spring specifications, and fulcrum position, the weight of the suspended medical device cannot be accurately predicted and often varies. Therefore, the suspension arm should be self-adjustable to adapt to different loads. Furthermore, due to variations in operating room ceiling heights, users also require adjustments to the range of vertical swing angles of the spring arm. Existing gas spring suspension arms adapt to small load variations by adjusting the gas spring fulcrum position along a line. When the fulcrum position is adjusted towards the suspension arm's rotation axis, a smaller load is suitable, and vice versa. This method allows for a limited load adjustment range and cannot adjust the swing angle range, for example, from a 10° upward swing to a 30° downward swing, or from a 20° upward swing to a 20° downward swing. Summary of the Invention

[0004] The main technical problem solved by this invention is to provide a gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm, so as to achieve more precise adjustment of the position of the gas spring fulcrum, adapt to a larger load range of the suspension arm, and adjust the swing angle range.

[0005] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm, comprising: a base, a slider I, a slider seat, an adjusting bolt I, a slider II, an adjusting bolt II, a suspension arm, and a gas spring. The base is a hollow four-column shape, symmetrical on both sides, with two through holes between the two columns on the side, and the suspension arm is hinged between the two columns in the middle; the slider I is convex, with a through threaded hole in the middle protruding part; the adjusting bolt I passes vertically through the two through holes on the side of the base and the through threaded hole in the middle of the slider I, and the protruding part of the slider I abuts between the two columns on the side of the base, so that the slider I can move up and down along the adjusting bolt I but cannot rotate; the slider seat is a concave groove formed by two short plates and one long plate, with through holes on the sides of the two short plates, and is fixed to the side of the slider I as a whole, with the long side at a certain angle to the horizontal and not perpendicular; the slider II has a through threaded hole in the middle, and the pin II passing through the middle through hole at the top serves as the fulcrum of the gas spring; the adjusting bolt II passes through the two through holes of the slider seat and the through threaded hole in the middle of the slider II; the other end of the gas spring is hinged to the pin I on the side of the suspension arm.

[0006] Preferably, the slider I, slider seat, adjusting bolt I, slider II, adjusting bolt II, and gas spring are arranged symmetrically in two sets on both sides of the base and the suspension arm.

[0007] Preferably, the angle between the long side of the slider and the horizontal is between 30° and 50°.

[0008] Preferably, the base consists of a mounting plate, a bridge plate, a reinforcing connecting plate, a lower base plate, and an upper boss. Two bridge plates are welded to the mounting plate and a reinforcing connecting plate is welded to the bottom. Each bridge plate has an upper boss with threaded through holes welded to its side and a threaded hole at the bottom to fix the lower base plate. The lower base plate has threaded through holes on both sides extending beyond the bridge plates, corresponding to the through holes of the upper boss.

[0009] Preferably, the slider I has a groove on its upper surface, the width of which is greater than the width of the protruding portion of the upper boss of the base.

[0010] The beneficial effects of this invention are as follows: This invention utilizes cross-arranged adjusting bolts I and II to allow the gas spring fulcrum on slider II to be adjusted within a two-dimensional plane. The farther the gas spring fulcrum is from the spring arm pivot, the greater the load that the spring arm can handle. The more the gas spring fulcrum is adjusted upwards and in the direction of the load, the more the applicable swing angle range of the spring arm is biased towards the upward angle, and vice versa. This achieves the adaptation of the suspension arm to a larger load range and different swing angle ranges. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a plan view of a gas spring fulcrum planar adjustment structure for a medical gas spring suspension arm according to the present invention. Figure 2 This is a three-dimensional schematic diagram of a gas spring fulcrum planar adjustment structure for a medical gas spring suspension arm according to the present invention. Figure 3 This is a schematic diagram of a certain adjustment position of the gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm according to the present invention. Figure 4 This is a three-dimensional assembly drawing of a gas spring fulcrum planar adjustment structure for a medical gas spring suspension arm according to the present invention. Figure 5 This is a three-dimensional schematic diagram of the base assembly structure of a gas spring fulcrum planar adjustment structure for a medical gas spring suspension arm according to the present invention.

[0013] Figure 6 This is a three-dimensional assembly exploded view of the base assembly structure of a gas spring fulcrum planar adjustment structure for a medical gas spring suspension arm according to the present invention.

[0014] The components in the attached diagram are labeled as follows: 1. Suspension arm pivot, 2. Gas spring, 3. Base, 4. Slider I, 5. Slider seat, 6. Adjusting bolt I, 7. Slider II, 8. Adjusting bolt II, 9. Pin I, 10. Upper boss, 11. Pin II, 12. Suspension arm, 13. Mounting plate, 14. Bridge plate, 15. Reinforcing connecting plate, 16. Lower base plate. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0016] like Figure 1-6 The present invention includes: a gas spring fulcrum planar adjustment structure for a medical gas spring suspension arm, comprising: a gas spring 2, a base 3, a slider I 4, a slider seat 5, an adjusting bolt I 6, a slider II 7, an adjusting bolt II 8, and a suspension arm 12. The gas spring 2, slider I 4, slider seat 5, adjusting bolt I 6, slider II 7, and adjusting bolt II 8 are symmetrically arranged on both sides of the base 3 and the suspension arm 12. The adjusting bolt I 6 passes through the upper boss 10, slider I 4, and lower base plate 16 on the side of the base 3. The slider I 4 abuts against the two pillars of the base 3. The slider seat 5 is welded to the slider I 4 at a 30-degree angle to the horizontal. The adjusting bolt II 8 passes through the through holes at both ends of the slider seat 5 and the threaded hole in the middle of the slider II 7. One end of the gas spring 2 is connected to the suspension arm 12 via a pin I 9, and the other end is connected to the pin II 11 on the slider II 7, which is the gas spring fulcrum.

[0017] The base 3 consists of two sets of bridge plates 14 welded to the mounting plate 13, a reinforcing connecting plate 15 welded between the two sets of bridge plates 14, an upper boss 10 welded to the side, and a lower base plate 16 connected through a bottom threaded hole. Threaded through holes are opened at corresponding positions on the upper boss 10 and the lower base plate 16.

[0018] The adjustment method of the gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm is as follows: By rotating the adjusting bolt I6, the slider I4 and its slider II7 can move upward or downward; by rotating the adjusting bolt II8, the slider II7 can be displaced at a certain angle to the horizontal. Combined, these two methods allow the slider II7 and its gas spring fulcrum pin II11 to be fixed at any point within a plane. Different fulcrum positions correspond to different load and swing angle ranges of the spring arm, such as... Figure 3 The fulcrum position in the example allows the spring arm to remain suspended between an upward tilt of 20° and a downward tilt of 30°.

Claims

1. A gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm, comprising: The system comprises a base, slider I, slider seat, adjusting bolt I, slider II, adjusting bolt II, suspension arm, and gas spring; characterized in that: the base is a hollow four-column shape, symmetrical on both sides, with two through holes between the two columns on the side, and the suspension arm is hinged between the two columns in the middle; slider I is convex, with a through threaded hole in the middle protruding part; the adjusting bolt I passes vertically through the two through holes on the side of the base and the through threaded hole in the middle of slider I, and the protruding part of slider I abuts between the two columns on the side of the base, thereby allowing slider I to... The slide block can move up and down along the adjusting bolt I but cannot rotate; the slide block seat is a concave groove formed by two short plates and one long plate, with through holes on the sides of the two short plates, and is fixed to the side of the slide block I as a whole, with the long side at a certain angle to the horizontal but not perpendicular; the slide block II has a through threaded hole in the middle, and the pin II through the through hole in the middle of the top serves as the fulcrum of the gas spring; the adjusting bolt II passes through the two through holes of the slide block seat and the through threaded hole in the middle of the slide block II; the other end of the gas spring is hinged to the pin I on the side of the suspension arm.

2. The gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm according to claim 1, characterized in that: The slider I, slider seat, adjusting bolt I, slider II, adjusting bolt II, and gas spring are arranged symmetrically in two sets on both sides of the base and the suspension arm.

3. The gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm according to claim 1, characterized in that: The angle between the long side of the slider and the horizontal plane is between 30° and 50°.

4. The gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm according to claim 1, characterized in that: The base consists of a mounting plate, two bridge-shaped plates, a reinforcing connecting plate, a lower base plate, and an upper boss. The two bridge-shaped plates are welded to the mounting plate and the reinforcing connecting plate is welded to the bottom. Each bridge-shaped plate has an upper boss with threaded through holes welded to its side and a threaded hole at the bottom to fix the lower base plate. The lower base plate has threaded through holes on both sides that extend beyond the bridge-shaped plates, corresponding to the through holes of the upper boss.

5. The gas spring fulcrum plane adjustment structure for a medical gas spring suspension arm according to claim 1, characterized in that: The slider I has a groove on its upper part, the width of which is greater than the width of the protruding part of the upper boss of the base.

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