Far-end release device of valve conveying system

Abstract

The invention relates to the technical field of medical instruments, in particular to a far-end release device of a valve conveying system.The far-end release device comprises an adjusting mechanism and a release mechanism, the adjusting mechanism comprises a shell, a gear ring, a sun gear, a planet carrier and a plurality of planet gears, the gear ring is detachably connected with the shell, the planet carrier is fixedly connected into the shell and matched with the gear ring, and the sun gear is detachably connected with the planet carrier; the sun gear is arranged in the center of the gear ring and fixedly connected with the planet carrier, the planet gears are arranged around the sun gear and fixed to the planet carrier, the planet gears are meshed with the gear ring and the sun gear, and the gear ring is rotated to drive the sun gear to rotate through the planet gears; a connecting rod is arranged in the center of the sun gear and used for being connected with a release mechanism so that valves in the release mechanism can be released. And effects are achieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a distal release device for a valve delivery system. Background Technology

[0002] In transcatheter mitral valve replacement surgery, the delivery system is the core device for achieving precise delivery and release of the valve via the vascular pathway. This system is typically over one meter long, with its distal end containing the loading chamber that loads and protects the compressed valve stent, while the proximal end houses the handle and release mechanism that the surgeon directly operates during the procedure. This design, which physically separates the critical release control unit from the execution unit (loading chamber), is a common paradigm in interventional medical devices, designed to allow surgeons to perform all precise controls from an operating table away from the patient's X-ray radiation zone.

[0003] However, due to the considerable distance between the loading chamber and the release mechanism, existing technologies often suffer from the following problems: the extremely long transmission rod / wire is prone to elastic deformation (such as compression and bending) during pushing or pulling, and is subjected to enormous static friction from the multi-layered tubular cavity. This results in a severely unstable transmission ratio between the input (number of knob rotations) and the output (actual displacement of the sheath), leading to low transmission efficiency and a prolonged release time for the loading chamber. Therefore, a remote release device for a valve delivery system is urgently needed to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a distal release device for a valve delivery system, which aims to solve the problems in the prior art and has the beneficial effects of fast release speed and stable operation feedback.

[0005] This invention is achieved through the following technical solution: A distal release device for a valve delivery system includes an adjustment mechanism and a release mechanism. The adjustment mechanism includes a housing, a gear ring, a sun gear, a planetary carrier, and multiple planetary gears. The gear ring is detachably connected to the housing. The planetary carrier is fixedly connected inside the housing and adapted to the gear ring. The sun gear is located at the center of the gear ring and is fixedly connected to the planetary carrier. Multiple planetary gears are arranged around the sun gear and fixed to the planetary carrier. The planetary gears mesh with the gear ring and the sun gear. Rotating the gear ring drives the sun gear to rotate through the planetary gears. The sun gear has a central connecting rod that connects to the release mechanism, allowing the valves in the release mechanism to release.

[0006] Preferably, the adjustment mechanism further includes an indicator assembly, which includes a limiting screw and an indicator block. One end of the limiting screw is threaded to the center of one of the planetary gears, and the other end is connected to the indicator block. The housing is also constructed with an indicator groove that is adapted to the indicator block for sliding.

[0007] Preferably, the release mechanism includes a loading chamber, a release rod, a connector, and a retaining tube. The release rod is disposed inside the loading chamber, with one end of the release rod fixedly connected to the loading chamber and the other end connected to a connecting rod. The connector is threaded onto the release rod, and the retaining tube is sleeved on the release rod and connected to the connector to keep the connector in a fixed position inside the loading chamber.

[0008] Preferably, the direction and pitch of the thread constructed on the release rod are the same as the direction and pitch of the thread on the limit screw.

[0009] Preferably, it also includes a limiting block, the bottom of which has protruding teeth, and the indicator groove has a toothed groove, the toothed groove being adapted to the protruding teeth.

[0010] Preferably, it also includes a knob, the knob having a locking screw that passes through the limiting block, and the bottom of the locking screw having a stop.

[0011] Preferably, the loading compartment has an outwardly extending connecting compartment, and the end of the release lever has a connecting block adapted to the connecting compartment.

[0012] Preferably, it also includes a rotating shell, the gear ring is constructed inside the rotating shell, and the rotating shell is detachably connected to the housing.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects: The technical solution provided by this invention transmits power to the sun gear via planetary gears by rotating a gear ring. The connecting rod on the sun gear is connected to the release mechanism, and its rotation controls the opening and closing of the release mechanism, thereby releasing the valve. Since there are multiple planetary gears arranged around the sun gear, the sun gear can rotate multiple times for every one rotation of the gear ring, thus reducing the number of rotations required during valve release and achieving the purpose of quickly controlling valve release from a distance. At the same time, the gear transmission mode is relatively stable, and the surgeon can also have good tactile feedback when manipulating valve release. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall schematic diagram of a distal release device of a valve delivery system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the installation of the gear ring, sun gear, and planet gears provided in an embodiment of the present invention; Figure 3 A schematic diagram of the interior of the adjustment mechanism provided in an embodiment of the present invention; Figure 4 A top view schematic diagram of the adjustment mechanism provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the housing provided in an embodiment of the present invention; Figure 6 A schematic diagram of a limiting block provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the interior of the loading compartment provided in an embodiment of the present invention.

[0015] The attached diagram shows the markings and corresponding component names: 100-Adjusting mechanism, 110-Housing, 111-Indicator groove, 112-Gear groove, 120-Gear ring, 130-Sun gear, 140-Planet gear, 150-Connecting rod, 160-Indicator assembly, 161-Limit screw, 162-Indicator block, 163-Limit block, 164-Protruding tooth, 165-Knob, 166-Locking screw, 167-Stop block, 170-Rotating housing, 180-Planet carrier, 200-Release mechanism, 210-Loading compartment, 211-Connecting compartment, 220-Release rod, 221-Connecting block, 230-Connector, 240-Holding tube. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0017] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that these specific details are not necessary to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been specifically described in order to avoid obscuring the invention.

[0018] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] In the description of this invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0020] Example like Figures 1-7 As shown, this embodiment provides a distal release device for a valve delivery system, including an adjustment mechanism 100 and a release mechanism 200, with the release mechanism 200 located distally. The adjustment mechanism 100 includes a housing 110, a gear ring 120, a sun gear 130, a planet carrier 180, and multiple planet gears 140. The housing 110 has multiple grooves, allowing the gear ring 120 to be detachably connected to the housing 110 via snap-fit ​​or embedding. The planet carrier 180 includes two circular disc-shaped structures of different sizes. The components are connected by hollow cylinders. One disc-shaped structure is adapted to fit into the groove inside the housing 110, thereby fixing the planet carrier 180. Another disc-shaped structure is used to mount the planet gears 140 and the sun gear 130. The diameter of this disc-shaped structure is slightly smaller than the diameter of the gear ring 120. Both are concentrically fitted. The sun gear 130 is located at the center of the gear ring 120 and is fixedly connected to the planet carrier 180. Multiple planet gears 140 are arranged around the sun gear 130 and are also fixed to the planet carrier 180. In this embodiment, specifically as follows... Figure 2 As shown, there are three planetary gears 140, evenly distributed around the sun gear 130. The planetary gears 140 mesh with the ring gear 120 and the sun gear 130, transmitting power. When the ring gear 120 rotates, the planetary gears 140 are driven, causing the sun gear 130 to rotate. The sun gear 130 has a connecting rod 150 at its center, which connects to the release mechanism 200. When the sun gear 130 rotates, the connecting rod 150 rotates synchronously, releasing the valve in the release mechanism 200. This structure has a transmission ratio of up to three times, meaning that one rotation of the outer ring gear causes three rotations of the sun gear, thus reducing the number of rotations required to release the valve and achieving rapid opening and closing of the remote loading compartment.

[0021] Preferably, the adjustment mechanism 100 further includes an indicator component 160, such as Figure 3As shown, the indicator assembly 160 includes a limiting screw 161 and an indicator block 162. One end of the limiting screw 161 passes through the planetary carrier 180 and is threaded to the center of one of the planetary gears 140, while the other end is connected to the indicator block 162. An indicator groove 111 is constructed on the housing 110. The indicator groove 111 is elongated, and the indicator block 162 can be fitted into the indicator groove 111. The limiting screw 161 rotates synchronously with the rotation of the planetary gear 140, and the planetary gear 140 is fixedly mounted on the planetary carrier 180. Therefore, the limiting screw 161 can rotate linearly, thereby causing the indicator block 162 to slide within the indicator groove 111. The position of the indicator block 162 within the indicator groove 111 corresponds to the release degree of the distal release mechanism 200. Therefore, during surgery, when the release mechanism 200 is inside the patient's body and not visible, the position of the indicator block 162 within the indicator groove 111 can be observed to determine whether the release mechanism 200 has released the valve.

[0022] Furthermore, such as Figure 7 As shown, the release mechanism 200 includes a loading chamber 210, a release rod 220, a connector 230, and a retaining tube 240. The loading chamber 210 is used to place the valve. The release rod 220 is disposed inside the loading chamber 210 and has external threads on its surface. One end of the release rod 220 is fixedly connected to the top of the loading chamber 210, and the other end extends out of the loading chamber 210 and is connected to the connecting rod 150. The connector 230 includes an integrally formed disc-shaped head end and a columnar tail end, and has a threaded groove inside. The threaded groove extends from the head end to the columnar tail end, so the connector 230 can be threadedly connected to the release rod 220. It should be noted that the head end of the connector 230 is located at the top of the loading chamber 210 and remains stationary. The retaining tube 240 is sleeved on the release rod 220 and connected to the tail end of the connector 230 to keep the connector 230 fixed in position within the loading chamber 210.

[0023] Furthermore, such as Figure 7As shown, the loading chamber 210 has an outwardly extending connecting chamber 211; the connecting chamber 211 is located outside the top of the loading chamber 210 and communicates with the loading chamber 210. The end of the release rod 220 has a connecting block 221, which is adapted to the connecting chamber 211, and the two are fixedly connected by a pin. When the release rod 220 rotates, its threads are adapted to the threaded groove in the connecting member 230, while the position of the connecting member 230 remains fixed. Therefore, the release rod 220 will move linearly along its own axial direction. During the release of the valve... During the process, the sun gear 130 is rotated by rotating the gear ring 120. The rotation of the connecting rod 150 is synchronized with the rotation of the sun gear 130. The release rod 220 is connected to the connecting rod 150. Therefore, the release rod 220 gradually drives the loading chamber 210 to move linearly during the rotation. The connecting piece 230 remains stationary due to the action of the retaining tube 240. Therefore, the loading chamber 210 slowly separates from the connecting piece 230, while the valve is fixed on the connecting piece 230. Thus, the loading chamber 210 is gradually released during the separation process of the connecting piece 230.

[0024] Preferably, the direction of the thread on the release rod 220 is the same as the direction of the thread on the limiting screw 161. Therefore, when rotating the gear ring 120, it can be ensured that the rotation direction of the gear ring 120, the rotation direction of the limiting screw 161, and the rotation direction of the release rod 220 are the same. In addition, the pitch of the thread on the release rod 220 is also the same as the pitch of the limiting screw 161. Therefore, the movement of the release rod 220 and the limiting screw 161 form a one-to-one feedback, so that the movement of the indicator block 162 can completely correspond to the movement of the release rod 220, and the state of the loading chamber 210 in the patient's body can be more accurately controlled.

[0025] Preferably, it also includes a limiting block 163, such as Figure 4 , Figure 5 as well as Figure 6 As shown, the bottom of the limiting block 163 has a protruding tooth 164, and the indicator groove 111 has a toothed groove 112. After the toothed groove 112 and the protruding tooth 164 are matched, the limiting block 163 is fixed in the indicator groove 111, thereby limiting the movement stroke of the indicator block 162. At the same time, since the movement of the limiting screw 161 and the release rod 220 is a one-to-one feedback during the opening of the loading chamber 210, the position of the limiting block 163 can be set according to the specific movement stroke of the release rod 220 required for the release valve. When the indicator block 162 moves to contact the limiting block 163, it stops moving, thereby achieving the limiting effect.

[0026] Preferably, it also includes a knob 165, which has a locking screw 166 that passes through the limiting block 163, and a stop block 167 is provided at the bottom of the locking screw 166; as Figure 6As shown, the knob 165 is located above the limiting block 163 and its width is greater than the width of the indicator groove 111. The locking screw 166 constructed on it is adapted to the threaded groove constructed on the limiting block 163. Therefore, the locking screw 166 can pass through the limiting block 163 by rotation. A circular stop 167 is connected to the bottom end of the locking screw 166. The stop 167 is also threadedly adapted to the locking screw 166. Therefore, by setting the knob 165 and the stop 167, the limiting block 163 can be fixedly installed on the indicator groove 111.

[0027] Furthermore, it also includes a rotating shell 170, with a gear ring 120 constructed inside the rotating shell 170. The two are integrally molded, so the gear ring 120 can be rotated by twisting the rotating shell 170. At the same time, the rotating shell 170 is provided with a buckle that matches the groove on the housing 110, thereby realizing a detachable connection between the rotating shell 170 and the housing 110.

[0028] Furthermore, protrusions made of materials such as silicone or rubber can be provided on the rotating shell 170 to increase the friction during rotation, thereby enabling better remote control of the opening of the loading chamber 210.

[0029] In use, twisting the rotating shell 170 causes the internal gear ring 120 to mesh with the planetary gear 140, transmitting power to the sun gear 130. Simultaneously, the limiting screw 161 connected to the planetary gear 140 also begins to rotate, and the indicator block 162 slides synchronously in the indicator groove 111. After the sun gear 130 rotates, the rotation of the connecting rod 150 is synchronized with the rotation of the sun gear 130. The release rod 220 is connected to the connecting rod 150, so during the rotation, the loading chamber 210 is gradually driven to move linearly, causing the loading chamber 210 to slowly separate from the connecting member 230. The valve is fixed on the connecting member 230, so it is gradually released during the separation of the loading chamber 210 and the connecting member 230.

[0030] The above embodiments of the present invention focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A distal release device for a valve delivery system, comprising an adjustment mechanism (100) and a release mechanism (200), characterized in that: The adjustment mechanism (100) includes a housing (110), a gear ring (120), a sun gear (130), a planet carrier (180), and a plurality of planet gears (140). The gear ring (120) is detachably connected to the housing (110). The planet carrier (180) is fixedly connected inside the housing (110) and adapted to the gear ring (120). The sun gear (130) is located at the center of the gear ring (120) and fixedly connected to the planet carrier (180). The plurality of planet gears (140) are arranged around the sun gear (130) and fixed to the planet carrier (180). The planet gears (140) mesh with the gear ring (120) and the sun gear (130). Rotating the gear ring (120) drives the sun gear (130) to rotate through the planet gears (140). The sun gear (130) has a centrally located connecting rod (150) for connecting to the release mechanism (200) so that the valve in the release mechanism (200) is released.

2. The distal release device of the valve delivery system according to claim 1, characterized in that, The adjustment mechanism (100) further includes an indicator assembly (160), which includes a limiting screw (161) and an indicator block (162). One end of the limiting screw (161) is threaded to the center of one of the planetary gears (140), and the other end is connected to the indicator block (162). The housing (110) is also provided with an indicator groove (111), which is adapted to the indicator block (162) for sliding.

3. The distal release device of the valve delivery system according to claim 2, characterized in that, The release mechanism (200) includes a loading chamber (210), a release rod (220), a connector (230), and a retaining tube (240). The release rod (220) is disposed inside the loading chamber (210), and one end of the release rod (220) is fixedly connected to the loading chamber (210), while the other end is connected to the connecting rod (150). The connector (230) is threaded onto the release rod (220). The retaining tube (240) is sleeved on the release rod (220) and connected to the connector (230) to keep the connector (230) fixed in position inside the loading chamber (210).

4. The distal release device of the valve delivery system according to claim 2, characterized in that, The direction and pitch of the thread constructed on the release rod (220) are the same as those of the limiting screw (161).

5. The distal release device of the valve delivery system according to claim 2, characterized in that, The indicator component (160) also includes a limiting block (163), the bottom of which is provided with a protruding tooth (164), and the indicator groove (111) is provided with a toothed groove (112), which is adapted to the protruding tooth (164). The limiting block (163) is used to limit the travel of the indicator block (162).

6. The distal release device of the valve delivery system according to claim 5, characterized in that, The indicator assembly (160) also includes a knob (165) having a locking screw (166) extending through the limiting block (163), the bottom of which has a stop (167).

7. The distal release device of the valve delivery system according to claim 6, characterized in that, The loading compartment (210) is configured with an outwardly extending connecting compartment (211), and the end of the release rod (220) is configured with a connecting block (221) adapted to the connecting compartment (211).

8. The distal release device of the valve delivery system according to claim 1, characterized in that, It also includes a rotating housing (170), the gear ring (120) is constructed inside the rotating housing (170), and the rotating housing (170) is detachably connected to the housing (110).

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