Actuator for medical device and medical device

Abstract

The invention provides an actuator for a medical device and the medical device, the medical device comprises a contraction structure, the contraction structure is connected with the actuator, the contraction structure is driven by the actuator to tighten or loosen an organ, and the actuator comprises a driving unit used for providing a forward driving force and a reverse driving force; one end of the transmission unit is connected with the driving unit, the other end of the transmission unit is connected with the contraction structure, and an inner hole is formed in the transmission unit; when the driving unit provides a forward driving force to the transmission unit, part of the transmission unit is accommodated in the inner hole to reduce the distance between the driving unit and the contraction structure so as to drive the contraction structure to tighten the organ; when the driving unit provides reverse driving force to the transmission unit, the transmission unit is far away from the inner hole to enlarge the distance between the driving unit and the contraction structure so as to drive the contraction structure to loosen the organ. The transmission unit is contained in or far away from the inner hole, so that the adjustment range of tightening the organ is enlarged.

Description

Technical Field

[0001] The present invention relates to the technical field of implantable medical devices, and particularly relates to an actuator for a medical device and a medical device. Background Art

[0002] In order to treat diseases such as urinary incontinence, fecal incontinence, gastroesophageal reflux disease, etc., and in order to treat obesity by gastric banding, a medical device is usually implanted into a patient. The medical device includes a contractile structure commonly referred to as a cuff, and the contractile structure is attached around a hollow human organ such as the urethra, rectum, esophagus or stomach. In order to reduce the diameter of the organ under discussion or occlude the organ, the contractile structure applies pressure to the organ. Especially in the case of urinary incontinence or fecal incontinence, the contractile structure substantially forms an artificial sphincter, which can be opened and closed by controlling the pressure exerted by the cuff.

[0003] However, the existing medical devices implanted in patients cannot be adjusted according to different situations of users, resulting in a poor experience for patients. Summary of the Invention

[0004] The problem solved by the present invention is that the existing medical devices implanted in patients cannot be adjusted according to different situations of users.

[0005] To solve the above problem, the present invention provides an actuator for a medical device. The medical device includes a contractile structure, and the contractile structure is connected to the actuator. The actuator is used to drive the contractile structure to tighten or loosen an organ. The actuator includes:

[0006] A driving unit, which is used to provide a forward driving force and a reverse driving force;

[0007] A transmission unit, one end of the transmission unit is connected to the driving unit, the other end of the transmission unit is connected to the contractile structure, and an inner hole is provided in the transmission unit;

[0008] When the driving unit provides a forward driving force to the transmission unit, part of the transmission unit is accommodated in the inner hole to reduce the distance between the driving unit and the contractile structure so as to drive the contractile structure to tighten the organ;

[0009] When the driving unit provides a reverse driving force to the transmission unit, the transmission unit moves away from the inner hole to increase the distance between the driving unit and the contractile structure so as to drive the contractile structure to loosen the organ.

[0010] Optionally, the transmission unit includes a transmission nut and a screw rod. One end of the transmission nut is connected to the drive unit, the other end of the transmission nut is connected to one end of the screw rod, the other end of the screw rod is connected to the contraction structure, the transmission nut is a hollow structure, and an inner hole is provided in the transmission nut.

[0011] When the drive unit provides a forward driving force to the transmission nut, the screw rod moves in a direction close to the transmission nut until it is accommodated in the inner hole to drive the contraction structure to tighten the organ.

[0012] When the drive unit provides a reverse driving force to the transmission nut, the screw rod moves in a direction away from the transmission nut until it leaves the inner hole to drive the contraction structure to loosen the organ.

[0013] Optionally, the transmission unit further includes a screw head portion, a stud portion, and a rotating shaft portion that are coaxially arranged and sequentially connected within the transmission nut. One end of the screw head portion is connected to one end of the screw rod, the other end of the rotating shaft portion is connected to the drive motor, and an inner hole is provided in the rotating shaft portion.

[0014] Wherein, both the screw head portion and the stud portion are hollow structures, and the diameter of the screw rod is smaller than the diameters of the screw head portion, the stud portion, and the inner hole, so that the screw rod passes through the screw head portion and the stud portion and is accommodated in the inner hole.

[0015] Optionally, the diameter of the stud portion is larger than the diameter of the screw head portion, so that the screw head portion can be accommodated in the stud portion.

[0016] Optionally, the diameter of the screw head portion is smaller than or equal to the diameter of the inner hole, so that the screw head portion can pass through the stud portion and be accommodated in the inner hole.

[0017] Optionally, the transmission unit further includes at least one ball bearing, and the at least one ball bearing is connected to the transmission nut for improving the rotation of the transmission nut and for bearing the axial force generated by the drive unit.

[0018] Optionally, the actuator further includes:

[0019] A coupling unit, the coupling unit is arranged between the drive unit and the transmission unit, the coupling unit includes a first magnet and a second magnet, the first magnet is arranged on one side of the drive unit close to the rotating shaft portion, and the second magnet is arranged on one side of the rotating shaft portion close to the drive unit.

[0020] When the drive unit rotates, the first magnet rotates and transmits the rotation to the second magnet that rotates the rotating shaft portion.

[0021] Optionally, the driving unit includes:

[0022] At least one driving motor for providing forward driving force and reverse driving force;

[0023] A speed reducer, one end of the speed reducer is connected to the driving motor, and the other end of the speed reducer is connected to the transmission unit for adjusting the magnitudes of the forward driving force and the reverse driving force.

[0024] The embodiment of the present application further provides a medical device, and the medical device includes:

[0025] An actuator, such as any one of the above-mentioned actuators;

[0026] A contraction structure, the contraction structure is connected to the actuator, and the actuator drives the contraction structure to tighten or loosen an organ.

[0027] Optionally, the contraction structure includes:

[0028] A closure member for forming the contraction structure into a closed loop surrounding a hollow human organ;

[0029] A flexible strip, the flexible strip is arranged to extend along the longitudinal direction with the closure member, one end of the flexible strip is connected to the closure member, and the other end of the flexible strip is connected to the actuator;

[0030] When the actuator provides forward driving force, the flexible strip tightens to drive the closure member to form the closed loop of the contraction structure; when the actuator provides reverse driving force, the flexible strip loosens to drive the closure member not to form the closed loop of the contraction structure.

[0031] For the actuator for a medical device provided by the embodiment of the present application, when the driving unit provides forward driving force to the transmission unit, part of the transmission unit is accommodated in the inner hole to reduce the distance between the driving unit and the contraction structure to drive the contraction structure to tighten the organ; when the driving unit provides reverse driving force to the transmission unit, the transmission unit moves away from the inner hole to increase the distance between the driving unit and the contraction structure to drive the contraction structure to loosen the organ. By accommodating the transmission unit in the inner hole and moving away from the inner hole to reduce or increase the distance between the driving unit and the contraction structure, the adjustment range of the size of the closed loop is increased, and thus the size of the closed loop for tightening the organ can be adjusted according to the needs of different users, avoiding the situation of the closed loop being too tight or too loose, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic framework diagram of the medical device provided by the embodiment of the present application;

[0033] Figure 2 Schematic structural diagram of the contraction structure in the medical device shown; Figure 1

[0034] Figure 3 Schematic structural diagram of the actuator and control structure in the medical device shown; Figure 1

[0035] Figure 4 Schematic structural diagram of the actuator and control structure without the housing removed; Figure 3

[0036] Figure 5 Schematic structural diagram of the actuator provided by the embodiment of the present application;

[0037] Figure 6 Side view of the actuator shown; Figure 5

[0038] Figure 7 Cross-sectional view of the actuator along the A-A direction shown; Figure 6

[0039] Figure 8 Cross-sectional view of the actuator along the B-B direction shown; Figure 7

[0040] Explanation of reference numerals:

[0041] 1. Medical device; 100. Actuator; 200. Contraction structure; 300. Control unit; 400. Power supply unit; 500. Housing;

[0042] 110. Transmission unit; 120. Driving unit; 130. Shaft coupling unit;

[0043] 111. Transmission nut; 112. Screw rod; 113. Screw head part; 114. Stud part; 115. Rotating shaft part; 116. Inner hole; 117. Ball bearing;

[0044] 121. Driving motor; 122. Reducer;

[0045] 131. First magnet; 132. Second magnet; 133. Third magnet;

[0046] 210. Closing member; 220. Flexible strip. Detailed implementation manners

[0047] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention.

[0048] Please refer to Figure 1 and​​​​​​Figure 2 , Figure 1 is a schematic diagram of the framework of the medical device provided by the embodiment of the present application. Figure 2 is Figure 1 a schematic diagram of the structure of the medical device shown. The embodiment of the present application provides a medical device 1, which includes an actuator 100 and a contraction structure 200. The contraction structure 200 is connected to the actuator 100, and the actuator 100 drives the contraction structure 200 to tighten or loosen an organ.

[0049] Among them, the contraction structure 200 includes a closure 210 and a flexible strip 220. The flexible strip 220 extends along the longitudinal direction with the closure 210. The closure 210 is used to form the contraction structure 200 into a closed loop around the hollow human organ. One end of the flexible strip 220 is connected to the closure 210, and the other end of the flexible strip 220 is connected to the actuator 100. When the actuator 100 provides a forward driving force, the flexible strip 220 tightens to drive the closure 210 to form a closed loop of the contraction structure 200; when the actuator 100 provides a reverse driving force, the flexible strip 220 loosens to drive the closure 210 not to form a closed loop of the contraction structure 200. Specifically, when the flexible strip 220 tightens, the closure 210 drives the flexible strip 220 to wind around the hollow human organ, and makes one end of the closure 210 close to the flexible strip 220 to tighten the contraction structure 200 to its desired diameter; when the flexible strip 220 loosens, the closure 210 drives the flexible strip 220 not to wind to return to the initial state. The medical device 1 of the present application applies gentle and uniform pressure to the hollow human organ through the cooperation of the actuator 100 and the contraction structure 200, without local pressure peaks, and can also adjust the pressure according to the size of the organ, thereby reducing the impact of the medical device 1 on the organ tissue and reducing damage to the organ tissue.

[0050] In some embodiments, the flexible strip 220 is made of an implant-grade silicone elastomer with sufficient Shore hardness.

[0051] Please continue to refer to Figure 3 and Figure 4 , Figure 3 is Figure 1 a schematic diagram of the structure of the actuator and the control structure in the medical device shown; Figure 4 is Figure 3 a schematic diagram of the structure of the actuator and the control structure after removing the housing shown. The medical device 1 further includes a housing 500 for arranging the actuator 100. In some embodiments, the material of the housing 500 includes titanium.

[0052] The medical device 1 further includes a control unit 300. The control unit 300 is arranged in the housing 500, and the control unit 300 is used to control the execution of the actuator 100.

[0053] The medical device 1 further includes a power supply unit 400, which is disposed within the housing 500. The power supply unit 400 is connected to the control unit 300 via a cable. In some embodiments, the power supply unit 400 includes two implantable primary batteries, that is, non-rechargeable batteries, and each battery has a lifespan of at least 4 years. In some other embodiments, these batteries may be arranged in series instead of in parallel, and specific arrangements can be made according to actual situations, and no specific limitations are provided herein.

[0054] Please continue to refer to Figures 5 to 8 , Figure 5 which is a schematic structural diagram of the actuator provided by the embodiment of the present application. Figure 6 is Figure 5 a side view of the actuator shown in Figure 7 is Figure 6 a sectional view of the actuator shown in Figure 8 is Figure 7 a sectional view of the actuator shown in

[0055] It should be noted that by accommodating a part of the transmission unit 110 within the inner hole 116 in the present application, it can not only ensure the adjustment of the tightening degree of the contraction structure 200, but also reduce the occupied volume of the medical device 1 in the human body, so as to alleviate the foreign body sensation of the medical device 1 in the user's body.

[0056] Among them, the occupancy of the transmission unit 110 in the inner hole 116 can be adjusted according to the sizes of different user organs, the comfort level of the user, and the requirements of those skilled in the art, and no specific limitations are provided here.

[0057] The transmission unit 110 includes a transmission nut 111 and a screw rod 112. One end of the transmission nut 111 is connected to the driving unit 120, the other end of the transmission nut 111 is connected to one end of the screw rod 112, the other end of the screw rod 112 is connected to the contraction structure 200, the transmission nut 111 is a hollow structure, and an inner hole 116 is provided inside the transmission nut 111. When the driving unit 120 provides a forward driving force to the transmission nut 111, the screw rod 112 moves along the direction close to the transmission nut 111 until it is accommodated in the inner hole 116 to drive the contraction structure 200 to tighten the organ; when the driving unit 120 provides a reverse driving force to the transmission nut 111, the screw rod 112 moves along the direction away from the transmission nut 111 until it leaves the inner hole 116 to drive the contraction structure 200 to loosen the organ. In this application, by setting the transmission nut 111 as a hollow structure, the screw rod 112 can move axially in the transmission nut 111, and by providing the inner hole 116 in the transmission nut 111, the distance range of the screw rod 112 moving in the axial direction can be increased, and further, the range of adjusting the tension of the contraction structure 200 can be increased. Therefore, the contraction situation of the contraction structure 200 can also be better adjusted according to the actual situation of the user.

[0058] The transmission unit 110 further includes a screw head portion 113, a screw post portion 114, and a rotating shaft portion 115 that are coaxially arranged and sequentially connected inside the transmission nut 111. One end of the screw head portion 113 is connected to one end of the screw rod 112, the other end of the rotating shaft portion 115 is connected to the driving motor 121, and an inner hole 116 is provided inside the rotating shaft portion 115; among them, both the screw head portion 113 and the screw post portion 114 are hollow structures, and the diameter of the screw rod 112 is smaller than the diameters of the screw head portion 113, the screw post portion 114, and the inner hole 116, so that the screw rod 112 passes through the screw head portion 113 and the screw post portion 114 and is accommodated in the inner hole 116. By setting the screw head portion 113 and the screw post portion 114 as hollow structures, and the diameter of the screw rod 112 being smaller than the diameters of the screw head portion 113, the screw post portion 114, and the inner hole 116, the screw rod 112 can pass through the screw head portion 113, the screw post portion 114, and the inner hole 116, which can further increase the distance range of the screw rod 112 moving in the axial direction, increase the range of adjusting the tension of the contraction structure 200, and further can better adjust the contraction situation of the contraction structure 200 according to the actual situation of the user. In addition, the area occupied by the medical device 1 in the user's body can also be reduced, the discomfort of the user is alleviated, and the comfort of the user is improved.

[0059] In some embodiments, the diameter of the stud portion 114 is larger than the diameter of the head portion 113, so that the head portion 113 can be accommodated in the stud portion 114. By also accommodating the head portion 113 in the stud portion 114 during the movement of the screw rod 112, the distance between the contraction structure 200 and the actuator 100 can be further reduced, and the area occupied by the medical device 1 in the user's body can also be further reduced, alleviating the discomfort of the user and improving the comfort of the user. Moreover, since the head portion 113 can be accommodated in the stud portion 114, the distance range of the movement of the screw rod 112 in the axial direction is increased, and the range for adjusting the tension of the contraction structure 200 is increased.

[0060] In some embodiments, the diameter of the head portion 113 is less than or equal to the diameter of the inner hole 116, so that the head portion 113 can pass through the stud portion 114 and be accommodated in the inner hole 116. By also accommodating the head portion 113 in the stud portion 114 and the inner hole 116 during the movement of the screw rod 112, the distance between the contraction structure 200 and the actuator 100 can be further reduced, and the area occupied by the medical device 1 in the user's body can also be further reduced, alleviating the discomfort of the user and improving the comfort of the user. Moreover, since the head portion 113 can pass through the stud portion 114 and be accommodated in the inner hole 116, the distance range of the movement of the screw rod 112 in the axial direction is further increased, and the range for adjusting the tension of the contraction structure 200 is increased.

[0061] The transmission unit 110 further includes at least one ball bearing 117. The at least one ball bearing 117 is connected to the transmission nut 111 and the at least one ball bearing 117 is connected to the shaft coupling unit 130, for improving the rotation of the transmission nut 111 and for bearing the axial force generated by the drive unit 120.

[0062] The actuator 100 further includes a coupling unit. The coupling unit is disposed between the drive unit 120 and the transmission unit 110. The coupling unit includes a first magnet 131 and a second magnet 132. The first magnet 131 is disposed on a side of the drive unit 120 close to the rotating shaft portion 115, and the second magnet 132 is disposed on a side of the rotating shaft portion 115 close to the drive unit 120. When the drive unit 120 rotates, the rotation of the drive unit 120 drives the first magnet 131 to rotate, and the rotation of the first magnet 131 drives the second magnet 132 to rotate, and the rotation of the second magnet 132 drives the rotation of the rotating shaft portion 115.

[0063] In some embodiments, the coupling unit further includes a third magnet 133. The third magnet 133 is mounted on a metal plate, and the metal plate is used to shield the magnetic field from the first magnet 131, and this metal plate is a support for the first magnet 131 and the third magnet 133.

[0064] The driving unit 120 includes: at least one driving motor 121 and a speed reducer 122. The driving motor 121 is used to provide forward driving force and reverse driving force; one end of the speed reducer 122 is connected to the driving motor 121, and the other end of the speed reducer 122 is connected to the transmission unit 110, and is used to adjust the magnitudes of the forward driving force and the reverse driving force, so as to avoid the situation of organ damage caused by excessive driving force of the driving motor 121.

[0065] In some embodiments, in the embodiment of the present application, the control unit 300 controls the driving motor 121 in the actuator 100 to rotate. The rotation of the driving motor 121 is transmitted to the transmission nut 111 through the shaft coupling unit 130 to drive the rotation of the transmission nut 111. The rotation of the transmission nut 111 drives the screw rod 112 to move axially, and the axial movement of the screw rod 112 drives the contraction structure 200 to tighten or open the organ. And, since an inner hole 116 is provided in the transmission nut 111, the movement of the screw rod 112 into the inner hole 116 increases the movement range of the screw rod 112 in the axial direction, thereby increasing the tension range for tightening the organ, that is, the size of the closed loop can be adjusted better according to the needs of the user.

[0066] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. An actuator (100) for a medical device (1), characterized in that The medical device (1) comprises a contraction structure (200), wherein the contraction structure (200) is connected to the actuator (100), and the actuator (100) drives the contraction structure (200) to tighten or loosen an organ. The actuator (100) comprises: A driving unit (120), the driving unit (120) being configured to provide a forward driving force and a reverse driving force; a transmission unit (110), one end of the transmission unit (110) being connected to the driving unit (120), the other end of the transmission unit (110) being connected to the contraction structure (200), and an inner hole (116) being provided in the transmission unit (110); When the driving unit (120) provides a positive driving force to the transmission unit (110), a portion of the transmission unit (110) is accommodated in the inner hole (116) to reduce the distance between the driving unit (120) and the contraction structure (200) to drive the contraction structure (200) to tighten the organ; When the driving unit (120) provides a reverse driving force to the transmission unit (110), the transmission unit (110) moves away from the inner hole (116) to expand the distance between the driving unit (120) and the contraction structure (200) to drive the contraction structure (200) to loosen the organ.

2. The actuator (100) according to claim 1, characterized in that The transmission unit (110) comprises a transmission nut (111) and a screw rod (112), one end of the transmission nut (111) is connected to the driving unit (120), the other end of the transmission nut (111) is connected to one end of the screw rod (112), and the other end of the screw rod (112) is connected to the contraction structure (200), the transmission nut (111) is a hollow structure, and the inner hole (116) is provided in the transmission nut (111). When the driving unit (120) provides a positive driving force to the transmission nut (111), the screw rod (112) moves in a direction close to the transmission nut (111) until it is accommodated in the inner hole (116) to drive the contraction structure (200) to tighten the organ; When the driving unit (120) provides a reverse driving force to the driving nut (111), the screw (112) moves in a direction away from the driving nut (111) until it leaves the inner hole (116) to drive the contraction structure (200) to loosen the organ.

3. The actuator (100) according to claim 2, characterized in that The transmission unit (110) further comprises a screw head (113), a stud portion (114) and a rotating shaft portion (115) coaxially arranged in the transmission nut (111) and connected in sequence, one end of the screw head (113) is connected to one end of the screw rod (112), the other end of the rotating shaft portion (115) is connected to the driving motor (121), and the inner hole (116) is provided in the rotating shaft portion (115); The screw head portion (113) and the stud portion (114) are both hollow structures, and the diameter of the screw rod (112) is smaller than the diameter of the screw head portion (113), the diameter of the stud portion (114) and the diameter of the inner hole (116), so that the screw rod (112) passes through the screw head portion (113) and the stud portion (114) and is accommodated in the inner hole (116).

4. The actuator (100) according to claim 3, characterized in that The diameter of the stud portion (114) is greater than the diameter of the screw head portion (113), so that the screw head portion (113) can be accommodated in the stud portion (114).

5. The actuator (100) according to claim 4, characterized in that The diameter of the screw head portion (113) is smaller than or equal to the diameter of the inner hole (116), so that the screw head portion (113) can pass through the stud portion (114) and be accommodated in the inner hole (116).

6. The actuator (100) according to any one of claims 2 to 5, characterized in that The transmission unit (110) further comprises at least one ball bearing (117), which is connected to the transmission nut (111) and is used to improve the rotation of the transmission nut (111) and to withstand the axial force generated by the drive unit (120).

7. The actuator (100) according to any one of claims 3 to 5, characterized in that The actuator (100) further comprises: A coupling unit is provided between the driving unit (120) and the transmission unit (110), and comprises a first magnet (131) and a second magnet (132), wherein the first magnet (131) is provided on a side of the driving unit (120) close to the rotating shaft portion (115), and the second magnet (132) is provided on a side of the rotating shaft portion (115) close to the driving unit (120). When the driving unit (120) rotates, the first magnet (131) rotates and transmits the rotation to the second magnet (132) which rotates the rotating shaft portion (115).

8. The actuator (100) according to any one of claims 1 to 5, characterized in that The driving unit (120) comprises: at least one driving motor (121), the driving motor (121) being configured to provide a forward driving force and a reverse driving force; A reducer (122), one end of the reducer (122) is connected to the drive motor (121), and the other end of the reducer (122) is connected to the transmission unit (110), and is used to adjust the magnitudes of the forward driving force and the reverse driving force.

9. A medical device (1), characterized in that The medical device (1) comprises: An actuator (100) according to any one of claims 1 to 8; A contraction structure (200) is connected to the actuator (100), and the actuator (100) drives the contraction structure (200) to tighten or loosen an organ.

10. The medical device (1) according to claim 9, characterized in that The contraction structure (200) comprises: a closure member (210), the closure member (210) being used to form the contraction structure (200) into a closed ring around the hollow human organ; a flexible strip (220), the flexible strip (220) and the closing member (210) extending in a longitudinal direction, one end of the flexible strip (220) being connected to the closing member (210), and the other end of the flexible strip (220) being connected to the actuator (100); When the actuator (100) provides a positive driving force, the flexible strip (220) is tightened to drive the closing member (210) to form the contraction structure (200) into the closed loop; when the actuator (100) provides a reverse driving force, the flexible strip (220) is loosened to drive the closing member (210) to prevent the contraction structure (200) from forming the closed loop.

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