Arm for supporting monitor, medical assembly and medical device
The rotatable arm system with friction-based restraint mechanisms for medical solution containers maintains consistent distance from monitors, preventing obstruction and accidental activation, enhancing treatment safety and accessibility.
Patent Information
- Application Number
- PCT/CN2024/106879
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2026-01-29
AI Technical Summary
Medical solution bags can obstruct the monitor screen during orientation adjustments, potentially blocking visibility and accidentally activating software functions, posing a risk to patient safety.
A rotatable arm system for monitors that secures a rod mechanism for medical solution containers, allowing the monitor and containers to rotate together, with friction-based restraint mechanisms to maintain a consistent distance and prevent obstruction.
Prevents bags from blocking the monitor screen and unwantedly activating software functions, ensuring controlled monitor orientation and improved accessibility during medical treatments.
Smart Images

Figure CN2024106879_29012026_PF_FP_ABST
Abstract
Description
ARM FOR SUPPORTING MONITOR, MEDICAL ASSEMBLY AND MEDICAL DEVICETECHNICAL FIELD
[0001] The invention relates to an arm for supporting a monitor, a medical assembly comprising the arm and a medical device comprising the medical assembly.BACKGROUND
[0002] Medical devices are often equipped with a monitor to display information related to the medical treatments, and the monitor may further function as an input device to receive user instructions when it is equipped with a touchscreen or control buttons. To provide easy access to the monitor during the treatment, monitors whose orientation can be adjusted horizontally are widely used.
[0003] During medical treatments, an infusion of one or more medical solutions is sometimes required. These medical solutions are usually provided in containers, for example, bags. To facilitate the infusion, medical devices are often further equipped with an infusion rod, with its lower end mounted on the housing of the medical device and its upper end provided with hooks for hanging the bags with medical solutions.
[0004] However, when the monitor’s orientation is adjusted and the monitor screen becomes close to the bags with medical solutions, it can happen that one or more bags come in front of the monitor blocking visibility and access to the monitor screen at least partially, and the bags may even accidentally press onto the touchscreen or the control buttons, unwantedly activating the software functions present on the monitor screen, which will disturb the prescribed treatment and may even cause danger to the patient.SUMMARY
[0005] In view of the problems existed in the prior art, the invention provides an arm for supporting a monitor, a medical assembly comprising the arm and a medical device comprising the medical assembly, which can at least reduce the possibility of a bag with medical solution coming in front of the monitor blocking visibility and access to the monitor or even unwantedly activating software functions present on the monitor.
[0006] In the present disclosure, the use of the expression “may be” or “may have” and so on, is to be understood synonymously with “preferably is” or “preferably has” and so on respectively, and is intended to illustrate an embodiment.
[0007] Whenever numerical words are mentioned herein, the person skilled in the art shall recognize or understand them as indications of numerical lower limits. Hence, unless this leads to a contradiction evident for the person skilled in the art, the person skilled in the art shall comprehend for example “one” as encompassing “at least one” . This understanding is also equally encompassed by the present disclosure as the interpretation that a numerical word, for example, “one” may alternatively mean “exactly one” , wherever this is evidently technically possible in the view of the person skilled in the art. Both of these understandings are encompassed by the present disclosure and apply herein to all used numerical words.
[0008] According to a first aspect of the invention, an arm for supporting a monitor is provided, which comprises: an arm base; and an arm body supported on the arm base and configured for securing the monitor; wherein the arm body is further configured to be rotatable relative to the arm base around a first axis; wherein the arm body comprises a receiving structure configured for receiving and securing a rod mechanism. With the rod mechanism secured in the receiving structure of the arm body, and the monitor also secured to the arm body, the rod mechanism always rotates together with the monitor when the arm body is rotated. When there’re containers with medical solutions held on the rod mechanism, the distance between the containers and the monitor always stays unchanged, reducing the possibility of the containers coming in front of the monitor unwantedly blocking visibility and access to the monitor or even activating software functions on the monitor.
[0009] According to an embodiment of the invention, the first axis runs in a direction along which the arm body is supported by the arm base. Therefore, a horizontal adjustment of the monitor orientation can be achieved. In the present disclosure, “vertical” , “horizontal” , “upper” , “lower” , “top” , “bottom” and other similar direction-indicating terms are defined by the orientation of the monitor, the medical assembly and the medical device ready for use or in use.
[0010] According to an embodiment of the invention, the receiving structure is positioned at a rear side or a lateral side of the arm body, herein the rear side and the lateral side of the arm body is defined according to the orientation of the monitor when the monitor is secured to the arm body. Thus the rod mechanism will be mounted at the rear side or the lateral side of the arm body and won’t disturb the use of the monitor. Furthermore, the containers with medical solutions held on the rod mechanism can be kept relatively farther away from the monitor screen.
[0011] According to an embodiment of the invention, the arm further comprises a first rotation restraining mechanism for restraining the rotation of the arm body relative to the arm base around the first axis when a force for rotating the arm body relative to the arm base around the first axis is exerted. Thus the orientation of the monitor can be adjusted in a more controllable way.
[0012] According to an embodiment of the invention, the first rotation restraining mechanism comprises a first friction component disposed between the arm base and the arm body for offering a friction force when a force for rotating the arm body relative to the arm base around the first axis is exerted, and a pressing assembly for pressing the arm base and the arm body towards each other with the first friction component pressed in-between. Such a pressure-loaded configuration can effectively achieve a friction force restrained rotation of the arm body relative to the arm base, while ensuring a reliable connection between the arm body with the arm base.
[0013] According to an embodiment of the invention, the arm base has an engaging structure having a first surface facing the arm body and a second surface opposite to its first surface, the first friction component is disposed between the first surface of the engaging structure and the arm body, the pressing assembly comprises a pressing component having a first surface facing the second surface of the engaging structure and a second surface opposite to its first surface, the first rotation restraining mechanism further comprises a second friction component disposed between the first surface of the pressing component and the second surface of the engaging structure for offering a friction force when a force for rotating the arm body relative to the arm base around the first axis is exerted, and the pressing assembly further comprises a pressing force applying assembly preloaded with a force to press the pressing component and the arm body towards each other, with the second friction component, the engaging structure, and the first friction component pressed in turn and in-between. Such a pressure-loaded configuration can effectively achieve a friction force restrained rotation of the arm body relative to the arm base, while ensuring a reliable connection between the arm body with the arm base.
[0014] According to an embodiment of the invention, the pressing force applying assembly comprises at least one screw each seated within a corresponding pre-compressed spring, the pressing component has at least one through hole positioned correspondingly to the at least one screw, the pressing force applying assembly is configured that each screw goes through the corresponding through hole in the pressing component and is mounted to the arm body, with one end of the corresponding spring pressed against the second surface of the pressing component and the other end of the corresponding spring pressed against a head of the screw.
[0015] According to an embodiment of the invention, the at least one screw are distributed uniformly relative to the first axis, i.e., positioned along the first axis if only one screw is used, or positioned with an even interval along a circumferential direction relative to the first axis if more than one screws are used. Thus the arm base and the arm body are pressed towards each other either along the first axis or at positions evenly distributed along a circumferential direction relative to the first axis, therefore a stabler and more reliable supporting for the arm body by the arm base can be realized, and the rotation of the arm body relative to the arm base can be made stabler as well.
[0016] According to an embodiment of the invention, a lower end of the arm body extends to a position lower than and external of an upper end of the arm base in a peripheral area of the arm, forming a barrier in the peripheral area of the arm where the lower end of the arm body meets the upper end of the arm base, against any liquid that may drip onto the external surface of the arm during the treatment, so that liquid ingression can be reduced or prevented.
[0017] According to an embodiment of the invention, the arm body further comprises a tilting mechanism configured for securing the monitor, the tilting mechanism is further configured to be rotatable relative to the rest part of the arm body around a second axis different from the first axis. By having such a tilting mechanism, adjustment of the monitor orientation around the second axis, for example, vertical direction is made possible, while the rod mechanism and the containers held on it do not participate in such orientation adjustments.
[0018] According to another aspect of the invention, a medical assembly is provided, which comprises: a monitor; an arm for supporting the monitor according to any one of the aspects and the embodiments discussed above; and a rod mechanism for holding containers with medical solutions, received and secured in the receiving structure of the arm body; wherein the arm body is configured to be rotatable relative to the arm base around the first axis together with the monitor and the rod mechanism. With the rod mechanism secured in the receiving structure of the arm body, and the monitor also secured to the arm body, the rod mechanism and the containers with medical solutions held on it always rotate together with the monitor when the arm body is rotated, therefore the distance between the containers and the monitor always stays unchanged, reducing the possibility of the containers coming in front of the monitor unwantedly blocking visibility and access to the monitor screen or even activating software functions on the monitor screen.
[0019] According to an embodiment of the invention, the rod mechanism comprises a bush secured in the receiving structure and a tube assembly having a first end received in the bush and a second end for connecting with the containers with medical solutions, the tube assembly is configured to be rotatable relative to the bush around a third axis. With such a configuration of the tube assembly, in addition to its possible rotation around the first axis together with the arm body and the monitor, it can be further rotated relative to the arm body and the monitor around the third axis together with the containers with medical solutions, such a rotation around the third axis can be conducted both when a rotation of the arm body, the monitor, the rod mechanism and the containers are rotating around the first axis and when no such rotation around the first axis is being conducted, thus an easier access to the containers can be realized in a more flexible way to cater for various treatment scenarios.
[0020] According to an embodiment of the invention, the tube assembly has an axial extent with at least one bent, thus the second end of the tube assembly connected with the containers can be positioned closer to the user via the one or more bents to provide an easier access to the containers during treatments.
[0021] According to an embodiment of the invention, the third axis is along a central axis of the first end of the tube assembly.
[0022] According to an embodiment of the invention, the rod mechanism further comprises a second rotation restraining mechanism for restraining the rotation of the tube assembly relative to the bush around the third axis when a force for rotating the tube assembly relative to the bush around the third axis is exerted, thus the tube assembly and the containers held on it can be rotated in a more controllable way.
[0023] According to an embodiment of the invention, the second rotation restraining mechanism comprises at least one ring-shaped friction component disposed between the bush and the first end of the tube assembly for offering a friction force when a force for rotating the tube assembly relative to the bush around the third axis is exerted.
[0024] According to an embodiment of the invention, the rod mechanism further comprises a rotation limiting mechanism, which comprises a groove disposed along a circumferential direction relative to the third axis on one of the first end of the tube assembly and the bush, and a projection disposed on the other one of the first end of tube assembly and the bush which is configured to be guided and movable in the groove, for limiting a range of rotation of the second end of the tube assembly caused by a rotation of the tube assembly relative to the bush around the third axis to an area behind the monitor. Thus, the possibility of the containers held on the second end of the tube assembly coming in front of the monitor can be further reduced.
[0025] According to an embodiment of the invention, a part of a bottom surface of the first end of the tube assembly is raised above rest part of the bottom surface, so that when the tube assembly is rotated relative to the bush around the third axis, only part of the bottom surface of the first end of the tube assembly presses against and rotates on the inner bottom surface of the bush if the bush is closed at the bottom or the inner bottom surface of the receiving structure of the arm body if the bush is bottomless, therefore the friction between the bottom surface of the first end of the tube assembly and the bush or the receiving structure can be reduced.
[0026] According to an embodiment of the invention, a gap is formed between the bush and the receiving structure at an upper area of the receiving structure, so that if the rod mechanism waggles slightly in the receiving structure, the gap offers a space to tolerate such waggles, and possible damages to the rod mechanism and / or the receiving structure due to such waggles can be reduced or prevented.
[0027] According to an embodiment of the invention, the rod mechanism further comprises a sealing component disposed on top of the bush for sealing between the rod mechanism and the receiving structure, therefore liquid ingression into the bush or the receiving structure can be reduced or prevented.
[0028] According to another aspect of the invention, a medical device is provided, which comprises: a control unit; a medical assembly according to any one of the aspects and the embodiments discussed above; and a communication unit for conducting signal transmission between the control unit and the monitor.BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The invention and advantages thereof will be further understood by reading the following detailed description of the exemplary embodiments with reference to the drawings in which:
[0030] Fig. 1a exemplarily shows a medical device, wherein the rod mechanism is to be mounted onto the arm.
[0031] Fig. 1b exemplarily shows a medical device, wherein the rod mechanism has been mounted onto the arm.
[0032] Fig. 2 exemplarily shows the cross-section view of the arm with the rod mechanism mounted thereon.
[0033] Fig. 3 is an enlarged drawing of the section C of Fig. 2.
[0034] Fig. 4 exemplarily shows the cross-section view of the rod mechanism received and secured in the receiving structure of the arm.
[0035] Fig. 5 exemplarily shows the rotation limiting mechanism of the rod mechanism.DETAILED DESCRIPTION
[0036] Exemplary embodiments of the invention will be described hereinafter in more detail with reference to the drawings to better understand the concept of the invention. Each embodiment is provided merely by way of illustration of the invention and is not intended as a limitation thereof. For example, the technical features illustrated or described being part of an embodiment may be adopted on, or in association with, other embodiments for producing a further embodiment. It is to be understood that the present invention shall be inclusive of such modifications and variants. It is also underlined that the present description is not limited in its application to the construction and arrangement details of the components as described below using the appended figures. The present description can envisage other embodiments realized or implemented with other technically equivalent features. The terms used below are merely descriptive and should not be considered limiting.
[0037] Fig. 1a and Fig. 1b show a medical device according to one embodiment. The medical device comprises a monitor 1, an arm 2 for supporting the monitor 1, a rod mechanism 3 for holding containers with medical solutions, a control unit 4 for controlling the operation of the medical device to perform treatments and a communication unit 5 for conducting signal transmission between the control unit 4 and the monitor 1. Based on the signal transmission between the monitor 1 and the control unit 4, monitor 1 operates to present information related to the treatment, and to further receive user inputs if the monitor 1 is equipped with a touch screen or control buttons. In Fig. 1a a status where the rod mechanism 3 is to be mounted onto the arm 2 is shown, while in Fig. 1b a status where the rod mechanism 3 has been mounted onto the arm 2 is shown. Though the control unit 4 and the communication unit 5 are shown in Fig. 1a and 1b as two separate modules, they may be integrated as one module or each being a combination of multiple sub-modules or components disposed separately as well.
[0038] One example of the medical device is a blood treatment device, e.g., a hemodialysis device, a hemodiafiltration device or a hemofiltration device. The control unit 4 and the communication unit 5 may be housed at least partially within a housing 6 of the device, therefore they’re shown in dotted lines in Fig. 1a and Fig. 1b. As shown in Fig. 1a and Fig. 1b, the monitor 1 is mounted on top of the housing 6 via the arm 2, however, the monitor 1 may also be mounted to the side of the housing, or even mounted or placed separately from the housing 6, for example on a desktop away from the housing of the device, but still supported by the arm 2. Signal transmission between the monitor 1 and the control unit 4 can be conducted through wired communication or wireless communication.
[0039] The containers for medical solutions may be in the form of bags. The medical solutions may be solutions that are needed directly for a blood treatment itself, for example, a dialysis solution in the case of hemodialysis treatment or a substitution solution in the case of hemofiltration treatment or hemodiafiltration treatment. However, such solutions may also be those needed only in certain situations, e.g., when complications occur. Though the top end of the rod mechanism 3 is not shown in Fig. 1a and 1b, it may be equipped with hooks for hanging such bags.
[0040] As shown in Fig. 2, the arm 2 comprises an arm base 21 to be mounted on the housing 6 or to be mounted or placed on a separate desktop, and an arm body 22 supported on the arm base 21 along for example the vertical direction. The monitor 1 is secured to the arm body 22, and the securing may be made through any known securing mechanism, e.g., screwing, clamping, snapping or latching. The arm body 22 comprises a receiving structure 221 and the lower end of the rod mechanism 3 is received and secured therein. The arm body 22 is configured to be rotatable relative to the arm base 21 around a first axis A1, which may also be along the vertical direction. Though the arm body 22 comprising the receiving structure 221 shown in Fig. 1a, Fig. 1b, Fig. 2 and Fig. 4 is integrated as one-piece, it may also be made of two or more pieces of the same material or of different materials secured together through any known securing mechanism.
[0041] For obtaining a better access to the monitor screen, a user may grab the monitor 1 to rotate the monitor 1 horizontally to adjust the screen orientation, with the monitor 1 and the rod mechanism 3 both secured to the arm body 22, the monitor 1, the arm body 22 and the rod mechanism 3 rotate together relative to the arm base 21 around the first axis A1. Therefore, the distance between the bags hung on the rod mechanism 3 and the monitor 1 stays unchanged, reducing the possibility of the bags coming in front of the monitor unwantedly blocking visibility and access to the monitor screen or even activating software functions on the monitor.
[0042] The receiving structure 221 may be positioned at the rear side or the lateral side of the arm body 22. Herein, the rear side or the lateral side of the arm body 22 is defined always according to the current orientation of the monitor 1 since both may rotate but they always rotate together. Thus the rod mechanism 3 won’t disturb the use of the monitor 1. Furthermore, by positioning the receiving structure 221 at the rear side or the lateral side of the arm body 22, the bags hung on the rod mechanism 3 can be kept relatively farther away from the monitor screen.
[0043] The arm 2 may further comprise a first rotation restraining mechanism 23 for restraining the rotation of the arm body 22 relative to the arm base 21 around the first axis A1, when a user exerts a force aiming to rotate the monitor 1, the arm body 22 and the rod mechanism 3 together. Such a rotation restraining may be achieved utilizing friction forces, more specifically, the first rotation restraining mechanism 23 may comprise a first friction component 231 disposed between the arm base 21 and the arm body 22, which may be of any shape and may be made by any known material having the ability to offer friction forces where it contacts with another component. A washer made by polyformaldehyde may be used as the first friction component 231. To utilize the friction forces more effectively and at the same time to achieve a reliable connection between the arm body with the arm base, the first rotation restraining mechanism 23 may further comprise a pressing assembly for pressing the arm base 21 and the arm body 22 towards each other along for example the vertical direction, with the first friction component 231 pressed between the arm body 22 and the arm base 21. When a user is trying to rotate the monitor 1, the arm body 22 and the rod mechanism 3 together, he / she needs to first overcome the static friction forces between the contacting surfaces of the first friction component 231 and the arm body 22 in order to start the aimed rotation, and once the rotation is started it continues to be restrained by the sliding friction forces between those contacting surfaces. Thus, the adjustment of the monitor orientation can be made more controllable.
[0044] Still referring to Fig. 2, the arm base 21 may have an engaging structure 211 having a first surface 211a facing the arm body 22 and a second surface 211b opposite to the first surface 211a. The engaging structure 221 shown in Fig. 2 is in the form of an edge protruding axially inwards relative to the axis A1, while it may also be formed as an edge protruding outwards or a structure extending axially both inwards and outwards for connecting with other components or even a separate component secured to the arm body 21 through any known securing mechanism. The first friction component 231 is disposed between the first surface 211a and an end surface 222 of the arm body 22. The pressing assembly may comprise a pressing component 232 having a first surface 232a facing the second surface 211b of the engaging structure 211 and a second surface 232b opposite to the first surface 232a. The first rotation restraining mechanism 23 may further comprise a second friction component 233 disposed between first surface 232a of the pressing component 232 and the second surface 211b of the engaging structure 211, which may be of any shape and may be made by any known material having the ability to offer friction forces where it contacts with another component. A washer made by polyformaldehyde may be used as the second friction component 233. The pressing assembly may further comprise a pressing force applying assembly 234 preloaded with a force to press the pressing component 232 and the arm body 22 towards each other along for example the vertical direction, with the second friction component 233, the engaging structure 211, and the first friction component 231 pressed in turn between the pressing component 232 and the end surface 222 of the arm body 22.
[0045] The end surface 222 of the arm body 22, the first friction component 231, the engaging structure 211 of the arm base 21, the second friction component 233 and the pressing component 232 may be shaped and positioned correspondingly along the vertical direction, so that they stack in turn. In an embodiment, they may be all of the shape of a ring, with the first axis A1 running through the center of circle of each such ring; while in another embodiment each of them may consist of several arc segments positioned along a circumferential direction relative to the first axis A1, and still positioned correspondingly along the vertical direction so that they stack in turn at each arc segment; yet in another embodiment some of them may be of the shape of a ring and rest of them may consist of several above-described arc segments and they’re still positioned correspondingly along the vertical direction to stack in turn. When the pressing force applying assembly 234 presses the pressing component 232 and the arm body 22 towards each other, the second friction component 233, the engaging structure 211 and the first friction component 231 are pressed in turn between the pressing component 232 and the arm body 22. When a user exerts a force aiming to rotate the monitor 1, the arm body 22 and the rod mechanism 3 together, he / she needs to first overcome the static friction forces between the end surface 222 of the arm body 22 and the upper surface of the first friction component 231, and the static friction forces between the lower surface of the second friction component 233 and the first surface 232a of the pressing component 232, in order to start the aimed rotation, and once the rotation is started it continues to be restrained by the sliding friction forces between those contacting surfaces. Thus, the adjustment of the monitor orientation can be made more controllable.
[0046] The pressing force applying assembly 234 may comprise one or more screws 2341 each seated within a corresponding pre-compressed spring 2342, and the pressing component 232 may have one or more through holes positioned correspondingly to the screws. In the embodiment shown in Fig. 2, three sets of screw and spring positioned with an interval of 120 degrees between each two neighboring sets along a circumferential direction relative to the first axis A1 are used, but only two sets can be seen in the figure. The type of spring applicable is not limited to the coil spring sleeving the screw as shown in Fig. 2, any known spring which can be pre-compressed, for example, a washer spring through its central opening the screw going through can also be used. The tail 2341a of each screw 2341 goes through the corresponding through hole in the pressing component 232 and is mounted to the arm body 22, while one end 2342a of the corresponding spring presses against the second surface 232b of the pressing component 232 and the other end 2342b of the corresponding spring presses against the head 2341b of the screw. Herein, the expression “one end” and “the other end” of the spring shall be comprehended to encompass the upper surface or part of the upper surface and the bottom surface or part of the bottom surface of the washer spring where it presses against the second surface 232b of the pressing component 232 and the head of the screw respectively, when washer spring (s) are used. Adopting two or more than three sets of screw and spring evenly distributed along a circumferential direction relative to the first axis A1 is also possible, i.e., the first axis A1 runs through the center of the circle along which the sets are positioned, so that the arm base 21 and the arm body 22 are pressed towards each other at positions evenly distributed along the circumferential direction relative to the first axis A1, therefore a stabler and more reliable supporting for the arm body by the arm base can be realized, and the rotation of the arm body relative to the arm base can be made stabler as well. That said, adopting only one set of screw and spring positioned at the center of the circle with the first axis A1 running though is feasible as well, thus a simpler structure and lower cost can be achieved.
[0047] As shown in Fig. 2 and Fig. 3 which is an enlarged drawing of the section C marked by dotted lines in Fig. 2, in the peripheral area of the arm 2, the arm body 22 extends to its lower end 223 and the arm base 21 extends to its upper end 212, and the lower end 223 of the arm body 22 may extend to a position lower than and external of the upper end 212 of the arm base 21 to reduce or prevent liquid ingression into the internal space of the arm. This is desired in medical treatment occasions, because liquid, for example, the medical solutions may fall onto the external surface of the arm and pose risks.
[0048] Still referring to Fig. 2, in another embodiment the arm body 22 may further comprise a titling mechanism 224 onto which the monitor 1 is secured. The tilting mechanism is configured to be rotatable relative to the rest part of the arm body 22, including the receiving structure 221, around a second axis A2.The second axis A2 may be along the horizontal direction. By having such a tilting mechanism, the orientation of the monitor 1 can be additionally tilted upwards or downwards independent from the rest part of the arm body including the receiving structure and the rod mechanism mounted therein, therefore adjusting the monitor orientation both horizontally and vertically is made possible. The tilting mechanism can be realized by many known structures, thus won’t be discussed in detail in the present description.
[0049] As shown in Fig. 4, the rod mechanism 3 may comprise a bush 31 securely mounted to the receiving structure 221 of the arm body 22 and a tube assembly 32 having a first end 321 received in the bush 31 and a second end (not shown in the figure) at its top equipped with hooks for hanging bags containing medical solutions. A screw 38 is shown in Fig. 2 and 4 for mounting the bush 31 to the receiving structure 221, other securing methods for example clamping, snapping or latching may also be used for the mounting purpose. With the bush 31 securely connected to the receiving structure 221, when the monitor 1 and the arm body 22 are rotated around the first axis A1, the rod mechanism 3 and the bags rotate together with them, therefore the distance between the monitor 1 and the bags does change during such a rotation, reducing the possibility of the bags coming in front of the monitor unwantedly blocking visibility and access to the monitor screen or even activating software functions on the monitor.
[0050] Furthermore, the first end 321 of the tube assembly 32 is received in but not secured to the bush 31 and may be configured to be rotatable relative to the bush 31 around a third axis A3. The third axis A3 is along the central axis of the first end 321 of the tube assembly 32, and may be along the vertical direction as well. With such a configuration of the tube assembly, in addition to its possible rotation around the first axis A1 together with the arm body and the monitor, it can be further rotated relative to the arm body and the monitor around the third axis A3 together with the bags, thus an easier access to the bags can be realized in a more flexible way.
[0051] The tube assembly 32 may be shaped as a straight rod, while it may as well be shaped to have one or more bents along its axial extent, so that it extends with its second end closer to the user to provide the user an even easier access to the bags. For example, the tube assembly 32 shown in Fig. 1a and Fig. 1b is bent twice at positions B1 and B2.
[0052] The rod mechanism 3 may further comprise a second rotation restraining mechanism 33 for restraining the rotation of the tube assembly 32 relative to the bush 31 around the third axis A3 when a user exerts a force aiming to rotate the tube assembly 32. The second rotation restraining mechanism 33 may comprises one or more ring-shaped friction components, e.g. O-rings 331, disposed between the bush 31 and the first end 321 of the tube assembly 32 for forming an interference-fit between the first end 321 of the tube assembly 32 and the bush 31, therefore offering friction forces therebetween. Though in Fig. 2 and Fig. 4 the O-rings are positioned around the lower part of the first end 321 close to the bottom of the bush 31, they may also be positioned around the upper part of the first end 321 close to the top of the bush 31 or anywhere in between. When a user is trying to rotate the tube assembly 32 around the third axis A3, he / she needs to first overcome the static friction forces between the first end 321 of the tube assembly 32 and O-rings 331, in order to start the aimed rotation, and once the rotation is started it continues to be restrained by the sliding friction forces between those contacting surfaces. Thus, the rotation of the tube assembly can be made more controllable.
[0053] Referring to Fig. 4 and Fig. 5, the rod mechanism 3 may further comprise a rotation limiting mechanism 34, which may be configured in the form of a pair of groove 341 and projection 342, one disposed on the first end 321 of the tube assembly 32 and the other disposed on the bush 31. In Fig. 4 and Fig. 5 such a groove 341 is disposed on the bush 31 and such a projection 342 is disposed on the tube assembly 32, however a projection disposed on the bush and a groove disposed on the tube assembly is possible as well. The groove 341 extends along the circumferential direction relative to the third axis A3, and the project 342 is positioned correspondingly to the groove 341 so that it is guided in the groove 341 and is movable along the groove 341 when the tube assembly 32 is rotating in the bush 31. Once the projection 342 reaches to one of the two ends of the groove 341, any further rotation of the tube assembly 32 relative to the bush 31 beyond is therefore prevented. Along the circumferential direction relative to the third axis A3, the groove 341’s curved length is designed so that the range of rotation of the second end of the tube assembly 32 caused by the rotation of the tube assembly 32 around the third axis A3 is limited to an area behind the monitor 1, within a predetermined angle range corresponding to the circumferential extension of the groove 341, thus the second end of the tube assembly 32 together with the bags hung thereon always moves / rotates behind the monitor screen and the possibility of the bags accidentally coming in front of the monitor can be further reduced or even eliminated.
[0054] As shown in Fig. 2 and Fig. 4, the bush 31 is bottomless, so the first end 321 of the tube assembly 32 rests directly on the inner bottom surface 2211 of the receiving structure 221. It’s also possible that the bush 31 is closed at the bottom, so the first end 321 of the tube assembly 32 rests on the inner bottom surface of the bush instead. In both configurations, part of the bottom surface 3211 of the first end 321 of the tube assembly 32 may be raised above rest part of the bottom surface 3211 and a gap 35 is formed either between the bottom surface 3211 of the first end 321 and the inner bottom surface of the bush or between the bottom surface 3211 of the first end 321 and the inner bottom surface 2211 of the receiving structure 221, so that when the tube assembly 32 is rotating around the third axis A3, only part of the bottom surface 3211 of the first end 321 of the tube assembly 32 presses against and rotates on the inner bottom surface of the bush or the receiving structure, therefore friction therebetween can be reduced.
[0055] As shown in Fig. 4, another gap 36 may be formed between the bush 31 and the receiving structure 221 at the upper area of the receiving structure 221. When the rod mechanism 3 waggles slightly in the receiving structure 221, the gap 36 offers a space to tolerate such waggles for reducing or preventing possible damages to the rod mechanism 3 or the receiving structure 221.
[0056] The rod mechanism 3 may further comprise a sealing component 37 disposed on top of the bush 31 for forming an interference-fit between the rod mechanism 3 and the receiving structure 221, therefore liquid ingression into the bush 31 or the receiving structure 221 can be reduced or prevented. The sealing component 37 can be made by any known sealing material, for example rubber.
Claims
1.An arm (2) for supporting a monitor (1) , comprising:an arm base (21) ; andan arm body (22) supported on the arm base (21) and configured for securing the monitor (1) ;wherein the arm body (22) is further configured to be rotatable relative to the arm base (21) around a first axis (A1) ;wherein the arm body (22) comprises a receiving structure (221) configured for receiving and securing a rod mechanism (3) .2.The arm according to claim 1, wherein the first axis (A1) runs in a direction along which the arm body (22) is supported by the arm base (21) .3.The arm according to claim 1 or 2, wherein the receiving structure (221) is positioned at a rear side or a lateral side of the arm body (22) in relation to an orientation of the monitor (1) when the monitor (1) is secured to the arm body (22) .4.The arm according to any one of claims 1-3, wherein the arm (2) further comprises a first rotation restraining mechanism (23) for restraining the rotation of the arm body (22) relative to the arm base (21) around the first axis (A1) .5.The arm according to claim 4, wherein the first rotation restraining mechanism (23) comprises a first friction component (231) disposed between the arm base (21) and the arm body (22) for offering a friction force, and a pressing assembly for pressing the arm base (21) and the arm body (22) towards each other with the first friction component (231) pressed in-between.6.The arm according to claim 5, wherein the arm base (21) has an engaging structure (211) having a first surface (211a) facing the arm body (22) and a second surface (211b) opposite to its first surface (211a) , the first friction component (231) is disposed between the first surface (211a) of the engaging structure (211) and the arm body (22) , the pressing assembly comprises a pressing component (232) having a first surface (232a) facing the second surface (211b) of the engaging structure (211) and a second surface (232b) opposite to its first surface (232a) , the first rotation restraining mechanism (23) further comprises a second friction component (233) disposed between the first surface (232a) of the pressing component (232) and the second surface (211b) of the engaging structure (211) for offering a friction force, and the pressing assembly further comprises a pressing force applying assembly (234) preloaded with a force to press the pressing component (232) and the arm body (22) towards each other, with the second friction component (233) , the engaging structure (211) , and the first friction component (231) pressed in turn and in-between.7.The arm according to claim 6, wherein the pressing force applying assembly (234) comprises at least one screw (2341) each seated within a corresponding pre-compressed spring (2342) , the pressing component (232) has at least one through hole positioned correspondingly to the at least one screw (2341) , the pressing force applying assembly (234) is configured that each screw (2341) goes through the corresponding through hole in the pressing component (232) and is mounted to the arm body (22) , with one end (2342a) of the corresponding spring (2342) pressed against the second surface (232b) of the pressing component (232) and the other end (2342b) of the corresponding spring (2342) pressed against a head (2341b) of the screw (2341) .8.The arm according to claim 7, wherein the at least one screw (2342) are distributed uniformly relative to the first axis (A1) .9.The arm according to any one of claims 1-8, wherein a lower end (223) of the arm body (22) extends to a position lower than and external of an upper end (212) of the arm base (21) in a peripheral area of the arm (2) .10.The arm according to any one of claims 1-9, wherein the arm body (22) further comprises a tilting mechanism (224) configured for securing the monitor (1) , the tilting mechanism (224) is further configured to be rotatable relative to the receiving structure (221) around a second axis (A2) different from the first axis (A1) .11.A medical assembly, comprising:a monitor (1) ;an arm (2) for supporting the monitor (1) according to any one of claims 1-10; anda rod mechanism (3) for holding containers with medical solutions, received and secured in the receiving structure (221) of the arm body (22) ;wherein the arm body (22) is configured to be rotatable relative to the arm base (21) around the first axis (A1) together with the monitor (1) and the rod mechanism (3) .12.The medical assembly according to claim 11, wherein the rod mechanism (3) comprises a bush (31) secured in the receiving structure (221) and a tube assembly (32) having a first end (321) received in the bush (31) and a second end for connecting with the containers with medical solutions, the tube assembly (32) is configured to be rotatable relative to the bush (31) around a third axis (A3) .13.The medical assembly according to claim 12, wherein the tube assembly (32) has an axial extent with at least one bent.14.The medical assembly according to claim 12 or 13, wherein the third axis (A3) is along a central axis of the first end (321) of the tube assembly (32) .15.The medical assembly according to any one of claims 12-14, wherein the rod mechanism (3) further comprises a second rotation restraining mechanism (33) for restraining the rotation of the tube assembly (32) relative to the bush (31) around the third axis (A3) .16.The medical assembly according to claim 15, wherein the second rotation restraining mechanism (33) comprises at least one ring-shaped friction component (331) disposed between the bush (31) and the first end (321) of the tube assembly (32) for offering a friction force.17.The medical assembly according to any one of claims 12-16, wherein the rod mechanism (3) further comprises a rotation limiting mechanism (34) , which comprises a groove (341) disposed along a circumferential direction relative to the third axis (A3) on one of the first end (321) of the tube assembly (32) and the bush (31) , and a projection (342) disposed on the other one of the first end (321) of tube assembly (32) and the bush (31) which is configured to be guided and movable in the groove (341) , for limiting a range of rotation of the second end of the tube assembly (32) caused by a rotation of the tube assembly (32) relative to the bush (31) around the third axis (A3) to an area behind the monitor (1) .18.The medical assembly according to any one of claims 12-17, wherein a part of a bottom surface (3211) of the first end (321) of the tube assembly (32) is raised above rest part of the bottom surface (3211) .19.The medical assembly according to any one of claims 12-18, wherein a gap (36) is formed between the bush (31) and the receiving structure (221) at an upper area of the receiving structure (221) .20.The medical assembly according to any one of claims 12-19, wherein the rod mechanism (3) further comprises a sealing component (37) disposed on top of the bush (31) for sealing between the rod mechanism (3) and the receiving structure (221) .21.A medical device, comprising:a control unit (4) ;a medical assembly according to any one of claims 11-20; anda communication unit (5) for conducting signal transmission between the control unit (4) and the monitor (1) .
Citation Information
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