Variable speed conveyor and conveying system

Abstract

The application belongs to the technical field of medical devices, and discloses a variable-speed conveyor and a conveying system. The variable-speed conveyor and the conveying system comprise a shell, a plurality of rotating wheels rotatably arranged on the shell, and a variable-speed device arranged in the shell. The variable-speed device comprises a driving wheel and a driven wheel engaged with the driving wheel. Each of the rotating wheels is provided with a driving wheel, and the driving wheel is engaged with the driven wheel one by one to form different gear ratios. The driven wheel drives a conveying device to convey the objects to be conveyed. Through the plurality of rotating wheels corresponding to different rotating speeds, the technical problem that the speed cannot be adjusted in the use process in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and in particular to a variable speed conveyor and conveying system. Background Technology

[0002] Delivering diagnostic and therapeutic devices, implantable devices, etc., to the lesion site.

[0003] Chinese utility model patent CN209827107U discloses a delivery system and drive handle for transporting implants, which can control the sheath for rapid or slow movement of the implant delivery device. The drive handle of this invention includes a housing, a fixing member, a first drive mechanism, and a gear transmission mechanism. The gear transmission mechanism is disposed in the housing. The input section of the gear transmission mechanism is connected to the first drive mechanism, and the output section of the gear transmission mechanism is connected to the fixing member and is driven to rotate by the input section. The first drive mechanism drives the gear transmission mechanism to move the fixing member along the axis of the drive handle. The gear transmission mechanism outputs multiple transmission ratios and selectively drives the fixing member through one of the multiple transmission ratios. This patent has only one drive handle. When adjusting the speed ratio, the positions of the drive shaft and driven shaft need to be constantly adjusted. During the adjustment process, there is a problem of poor gear meshing, and the gears are prone to disengagement when the knob is turned. Furthermore, it is impossible to adjust the speed during use. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a variable speed conveyor and conveying system. By setting multiple dials to correspond to different speeds, it aims to solve the technical problem of speed adjustment during use in the prior art.

[0005] To achieve the above objectives, the present invention proposes a variable speed conveyor, comprising a housing, a dial rotatably mounted on the housing, and a speed-changing device disposed within the housing; the dial has at least two parts, and the speed-changing device includes a driving wheel and a driven wheel meshing with the driving wheel, each dial having a driving wheel, the driving wheel and the driven wheel meshing one-to-one to form different gear ratios; the driven wheel drives a conveying device to convey the object to be conveyed.

[0006] Preferably, the conveying device includes a driving pressure roller driven by the driven roller and a driven pressure roller rotatably disposed in the housing, with the object to be conveyed disposed between the driving pressure roller and the driven pressure roller.

[0007] Preferably, there is one active pressure roller, and a pressure roller gear driven by the driven roller is connected to the active pressure roller.

[0008] Preferably, there are multiple active pressure rollers, each of which is provided with a pressure roller gear. The pressure roller gears are connected to each other through an intermediate gear, and one of the active pressure rollers is driven by the driven roller.

[0009] Preferably, a self-locking mechanism is provided between the driven wheel and the conveying device.

[0010] Preferably, the self-locking mechanism includes a worm gear mounted on the driven wheel and a worm wheel mounted on the conveying device, wherein the worm gear and the worm wheel mesh with each other.

[0011] Preferably, a resistance device is also provided inside the housing, the resistance device including a spring and a sliding block connected to the spring, the sliding block extending out of the housing and connected to the conveying device.

[0012] Preferably, the housing is provided with a groove for placing the object to be transported.

[0013] Preferably, the housing is provided with a flap, and the flap is provided with a pressing block for pressing the conveyed material into the groove.

[0014] Preferably, the housing is provided with a slider, and the driven pressure roller is disposed on the slider.

[0015] Preferably, the flip cover is provided with a cam, which pushes the driven pressure roller to move closer to the driving pressure roller during the flip cover opening and closing process.

[0016] A conveying system that uses the aforementioned variable speed conveyor to convey an object to be conveyed, wherein the object to be conveyed is a guide wire, a sheath, or a microcatheter.

[0017] Compared with the prior art, the beneficial effects of the variable speed conveyor provided by the present invention are as follows:

[0018] 1. By setting multiple dials, different transport speeds can be controlled during conveying or retraction, resulting in higher safety.

[0019] 2. By adding a self-locking structure to the worm gear, the driving wheel and driven wheel will not rotate in opposite directions when the dial wheel is not turned or when resistance is encountered during the conveying process, thereby causing the guide wire to retract.

[0020] 3. The resistance device can be set up to more intuitively observe the force on the guide wire. The rotation speed and the force on the guide wire can be observed by the position of the sliding block extending out of the housing.

[0021] 4. By setting a cam on the housing, when the housing is closed, the cam pushes the slider, causing the driven pressure roller to approach the driving pressure roller and press against the guide wire, thereby increasing the conveying stability.

[0022] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a variable speed conveyor with a single active pressure roller according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of a variable speed conveyor with a slow-speed structure of a single active pressure roller according to an embodiment of the present invention.

[0025] Figure 3 This is a structural schematic diagram of a variable speed conveyor with a rapid structure of multiple active pressure rollers according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the structure of a variable speed conveyor with a slow-speed structure of multiple active pressure rollers according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of a variable speed conveyor with a resistance-based high-speed structure according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the variable speed conveyor with a slow-speed structure and resistance function according to an embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of a variable speed conveyor with a slow-speed structure where the resistance function is retracted, according to an embodiment of the present invention.

[0030] Figure 8 This is a side view of the flip-top closed structure of a variable speed conveyor according to an embodiment of the present invention.

[0031] Figure 9 This is a side view of the flip-top structure of a variable speed conveyor according to an embodiment of the present invention.

[0032] Figure 10 This is a schematic diagram of the rapid structure of the first self-locking function in an embodiment of the present invention.

[0033] Figure 11 This is a schematic diagram of a slow-speed structure with a self-locking function according to an embodiment of the present invention.

[0034] Figure 12 This is a schematic diagram of the rapid structure of the second self-locking function in an embodiment of the present invention.

[0035] Figure 13 This is a schematic diagram of a slow-speed structure for the second self-locking function in an embodiment of the present invention.

[0036] Figure 14This is a schematic diagram of the rapid structure of the third self-locking function in an embodiment of the present invention.

[0037] Figure 15 This is a schematic diagram of a slow-speed structure for the third self-locking function in an embodiment of the present invention.

[0038] Figure 16 This is a schematic diagram of the locking mechanism with a self-locking function according to the first embodiment of the present invention.

[0039] In the diagram: 1. Shell; 11. Groove; 12. Flip cover; 121. Pressure block; 122. Cam; 13. Slider; 2. Driving wheel; 3. Driven wheel; 4. Conveying device; 41. Driving pressure wheel; 42. Driven pressure wheel; 43. Pressure wheel gear; 44. Intermediate gear; 5. Self-locking mechanism; 51. Worm gear; 52. Turbine; 53. Spur gear; 54. Transmission gear set; 55. Ratchet self-locking structure; 551. Gear plate; 552. Adjusting handle 553. Locking part; 554. Locking foot; 555. Arc; 556. Rotating rod; 557. Adjusting part; 558. Arc adjusting part; 56. First gear; 57. Second gear; 58. Reversing mechanism; 581. First helical gear; 582. Second helical gear; 583. Third helical gear; 584. Fourth helical gear; 6. Resistance device; 61. Spring; 62. Sliding block; 7. Material to be transported; 8. Dial wheel; 9. Hemostatic valve. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0041] In the description of this invention, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0042] In the description of this invention, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for 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 limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0043] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Example 1:

[0045] See Figure 1 , Figure 2 This invention provides a conveying system using a variable speed conveyor, comprising a housing 1, a dial wheel 8 rotatably mounted on the housing 1, and a speed-changing device disposed within the housing 1. There are at least two dial wheels 8. The speed-changing device includes a driving wheel 2 and a driven wheel 3 meshing with the driving wheel 2. Each dial wheel 8 has a driving wheel 2, and the driving wheel 2 and driven wheel 3 mesh one-to-one to form different gear ratios. The driven wheel 3 drives a conveying device 4 to convey a material 7 to be conveyed, which may be a guidewire, sheath, or microcatheter.

[0046] Specifically, the housing 1 can be a handle for conveying the object to be conveyed. The object to be conveyed can be a guidewire, sheath, or microcatheter. The handle can be cylindrical or cuboid, or it can gradually increase in size from the center outwards. The channel for placing the guidewire is straight for easy guidewire placement. There are two dials 8, located on the left and right sides of the handle, namely a fast dial and a slow dial.

[0047] See Figure 1 and Figure 2 In an optional embodiment, the conveying device 4 includes a driving pressure roller 41 driven by a driven roller 3 and a driven pressure roller 42 rotatably disposed within the housing 1, with the object to be conveyed positioned between the driving pressure roller 41 and the driven pressure roller 42. There is one driving pressure roller 41, and a pressure roller gear 43 driven by the driven roller 3 is connected to the driving pressure roller 41.

[0048] Specifically, Figure 1 This is an internal schematic diagram of the quick-release dial. A large driving wheel 2 is concentrically connected to the dial 8, and a small driven wheel 3 meshes with the large driving wheel 2. When the linear velocities of the two gears are the same, the smaller gear has a greater angular velocity. A larger angular velocity results in a faster conveying speed for the conveying device 4. Both the driving wheel 2 and the driven wheel 3 are fixed to the housing 1 and secured by a fixing rod, ensuring they remain in a meshed state. The guide wire is placed inside the housing 1, and the driving pressure wheel 41 and the driven pressure wheel 42 press against both sides of the guide wire. The small driven wheel 3 drives the pressure wheel gear 43 to rotate. The pressure wheel gear 43 and the driving pressure wheel 41 are concentrically mounted and rotate together. The driving pressure wheel 41 drives the guide wire and the driven pressure wheel 42 to rotate together. The pressure wheel gear 43 is driven by the driven wheel 3, which should not be understood as simply the two being in direct contact; they can also be connected and driven through a self-locking mechanism. The specific self-locking mechanism will be described in detail in later embodiments. The driven wheel 3 should not be simply understood as a single gear; it can be a transmission mechanism that can increase the angular velocity.

[0049] Figure 2 This is a schematic diagram of the internal structure of the slow-speed dial. A small driving wheel 2 is concentrically connected to the dial 8, and a large driven wheel 3 meshes with the driving wheel 2. When the linear speeds are equal, the larger driven wheel 3 has a smaller angular velocity, resulting in a slower conveying speed for the conveying device 4. The guide wire is placed inside the housing 1, and the driving pressure wheel 41 and the driven pressure wheel 42 press against both sides of the guide wire. The small driven wheel 3 drives the pressure wheel gear 43 to rotate. The pressure wheel gear 43 and the driving pressure wheel 41 are concentrically mounted and rotate together. The driving pressure wheel 41 drives the guide wire and the driven pressure wheel 42 to rotate together. The pressure wheel gear 43 is driven by the driven wheel 3, which should not be understood as simply the two being in direct contact; it can also be driven by a self-locking mechanism, the specific self-locking mechanism of which will be described in detail in later embodiments. The driven wheel 3 should not be simply understood as a single gear; it can be a transmission mechanism that can reduce the angular velocity.

[0050] The slow and fast dials in the above examples are preferred embodiments, and should not be considered as a limitation on the specific structure, as long as the fast and slow mechanisms achieve different conveying speeds of the conveying device 4.

[0051] See Figure 3 and Figure 4In an optional embodiment, there are multiple active pressure rollers 41, preferably three, each active pressure roller 41 is provided with a pressure roller gear 43, and the pressure roller gears 43 are connected to each other through an intermediate gear 44, and one of the active pressure rollers 41 is driven by the driven roller 3.

[0052] Figure 3 This is a schematic diagram of the inside of the quick dial. Figure 4 This is a schematic diagram of the internal structure of the slow speed dial. Figure 3 and Figure 4 The structure relative to Figure 1 and Figure 2 The structure of the conveying device 4 has been improved. There are three driving pressure rollers 41, and each pressure roller gear 43 corresponds to one of the driving pressure rollers 41. Adjacent pressure roller gears 43 are driven by an intermediate gear 44. The conveying effect of multiple driving pressure rollers 41 is better. The driving pressure rollers 41 and driven pressure rollers 42 clamp the guide wire in a one-to-one correspondence. The diameter of the intermediate gear 44 is smaller than that of the pressure roller gears 43, and the smaller gear drives the larger gear with less effort.

[0053] Example 2:

[0054] Based on Embodiment 1, to provide a more intuitive understanding of the guide wire's delivery status, a resistance device 6 is also provided inside the housing 1, such as... Figure 5 , Figure 6 and Figure 7 The resistance device 6 includes a spring 61 and a sliding block 62 connected to the spring 61. The sliding block 62 extends partially from the housing 1 and is connected to the conveying device 4. A hemostatic valve 9 is connected to the left side of the housing 1. The sliding block 62 is connected to the driving pressure roller 41. The right end of the spring 61 is fixed to the housing 1, and the left end is connected to the sliding block 62. The housing 1 has a space for the sliding block 62 to slide. The entire conveying device 4 is housed within the sliding block 62 and moves with it.

[0055] The driving wheel 2 is connected to the housing 1, and the farthest driving pressure wheel 41 is connected to the sliding block 62. The driving wheel 2 and the farthest driving pressure wheel 41 are respectively connected to the driven wheel 3 via connecting rods. The constant distance between the center points of the driving wheel 2 and the driven wheel 3 ensures that the driving wheel 2 and the driven wheel 3 are always in a meshing state. The constant distance between the center point of the driven wheel 3 and the farthest driving pressure wheel 41 allows the driven wheel 3 to always drive the conveying device 4 to transmit the guide wire. The connecting rods can be fixed to the driving wheel 2, the driving pressure wheel 41, and the driven wheel 3 via bearings. They can rotate during the sliding of the sliding block 62, but the distance between the driven wheel 3 and the farthest driving pressure wheel 41, and between the driving wheel 2 and the driven wheel 3, remains constant.

[0056] The bottom of the sliding block 62 can be arc-shaped, and the sliding of the sliding block 62 also moves along the arc. During the movement, the guide wire is always clamped (e.g., Figure 5The bottom of the sliding block 62 can be a straight track, and the sliding block 62 moves along the straight track. During the movement, the guide wire is always held (e.g., ...). Figure 10 ).

[0057] By turning the dial 8, the friction between the guide wire and the delivery roller remains constant during the process of delivering the guide wire into the distal part of the body, ensuring uniform force distribution. The pressure on spring 61 maintains a constant compressed length (e.g., Figure 5 When the guide wire encounters resistance, slippage or a tendency to slip will occur between the pressure roller and the guide wire, the spring 61 will be further compressed, and the portion of the sliding block 62 protruding from the housing 1 will move towards the proximal end (e.g. Figure 7 The operator can switch to a slower mechanism to drive the guidewire, or assess the situation before deciding whether to drive the guidewire. This allows the physician to better choose between slow and fast mechanisms, making guidewire delivery safer.

[0058] Example 3:

[0059] In Embodiment 1 or Embodiment 2, a self-locking mechanism 5 is provided between the driven wheel 3 and the conveying device 4. There are various types of self-locking mechanisms 5. When the dial wheel 8 is not rotated or the guide wire is subject to resistance, the self-locking mechanism 5 keeps the pressure wheel stationary and prevents it from reversing, which would cause the guide wire to shift from its original position.

[0060] See Figure 12 and Figure 13 In an optional embodiment, the self-locking mechanism includes a worm 51 mounted on the driven wheel 3 and a worm wheel 52 mounted on the conveying device 4, with the worm 51 and worm wheel 52 meshing together. The driven wheel 3 can be composed of one or more gear sets. The rightmost driven wheel 3 and worm 51 are concentrically mounted, rotating together, with the worm 51 driving the worm wheel 52 to rotate. The worm wheel 52 engages with the leftmost pressure wheel gear 43 via several cylindrical gears 53. Preferably, there can be two or more cylindrical gears 53, increasing the distance between the worm wheel 52 and the pressure wheels (including the driving pressure wheel 41 and the driven pressure wheel 42) and the pressure wheel gear 43, preventing interference during power transmission. The leftmost cylindrical gear 53 and worm wheel 52 are concentrically mounted and rotate together. The size of the cylindrical gear 53 is equal to that of the intermediate gears, resulting in better transmission performance and preventing continuous changes in transmission speed, thus shortening gear life. When the worm wheel 52 rotates, it drives the driving pressure wheel 41 to rotate together, conveying the guide wire.

[0061] To accommodate conveyor devices 4 with different installation orientations, the self-locking cylindrical gear 53 described above can be replaced with a reversing mechanism 58. (See reference...) Figure 14 and Figure 15The reversing mechanism 58 includes a first helical gear 581 concentrically mounted with the worm gear 52, a second helical gear 582 meshing with the first helical gear 581, a third helical gear 583 coaxially mounted with the second helical gear 582, and a fourth helical gear 584 meshing with the third helical gear 583. The fourth helical gear 584 is connected to the conveying device 4 and can be concentrically mounted with the leftmost drive pressure roller 41.

[0062] Specifically, the worm 51 drives the worm wheel 52 to rotate horizontally, the first helical gear 581 and the worm wheel 52 rotate together horizontally, the second helical gear 582 rotates vertically, the second helical gear 582 drives the third helical gear 583 to rotate vertically, the fourth helical gear 584 reverses direction and rotates horizontally, and the driving pressure roller 41 rotates horizontally with the fourth helical gear 584 to transport the guide wire.

[0063] Another self-locking structure, see [link / reference] Figure 10 , Figure 11 and Figure 16 The self-locking mechanism 55 achieves self-locking through a ratchet self-locking structure. The driven wheel 3 and the conveying device 4 are driven by a transmission gear set 54, and the ratchet self-locking structure 55 achieves self-locking by controlling the transmission gear set 54. The transmission gear set 54 can have various structures. The transmission gear set 54 can have only one gear, which meshes with the driven wheel 3 on the left and with the pressure wheel gear 43 on the right (not shown in the figure in this case). The ratchet self-locking structure 55 achieves self-locking by controlling this gear.

[0064] The transmission gear set 54 can be composed of multiple gears. A specific example using two gears will be provided below. A first gear 56 is concentrically mounted on the driven wheel 3, and the first gear 56 rotates together with the driven wheel 3. The first gear 56 drives a second gear 57 to rotate. The first gear 56 and the second gear 57 are equal in size and maintain equal angular velocities. The second gear 57 drives the conveying device 4 to rotate. A ratchet self-locking structure 55 is connected to the second gear 57. The ratchet self-locking structure 55 includes a gear disc 551 and a locking mechanism. The gear disc 551 is concentrically connected to the second gear 57, and the gear disc 551 rotates together with the second gear 57. The locking mechanism includes an adjusting handle 552 and a locking part 553 controlled by the adjusting handle 552. The locking part 553 is inverted V-shaped, and its upper end is rotatably mounted on the housing 1. Symmetrical locking feet 554 are arranged on both sides below the locking part 553. The locking feet 554 extend towards the middle of the locking part 553. The left locking foot 554 engages with the gear disc 551 to prevent the gear disc 551 from rotating clockwise, and the right locking foot 554 engages with the gear disc 551 to prevent the gear disc 551 from rotating counterclockwise. An arc 555 is provided above the locking feet 554. When the left locking foot 554 is engaged with the gear disc 551, counterclockwise rotation is not affected. When the right locking foot 554 is engaged with the gear disc 551, the arc 555 allows the gear disc 551 to rotate clockwise without being affected, thus preventing interference when switching locking feet 554. The adjusting handle 552 includes a rotating rod 556. One end of the rotating rod 556 is located inside the locking part 553, and the other end extends out of the housing 1. An adjusting part 557 is provided on the end extending out of the housing 1. An arc-shaped adjusting part 558 is provided on the end located inside the locking part 553. The rotating shaft of the rotating rod 556 is positioned within the locking part 553. The locking part 553 is adjusted by rotating the adjusting part 557 to rotate the arc adjusting part 558. When the arc adjusting part 558 rotates clockwise, the right locking foot 554 engages with the gear disc 551; when the arc adjusting part 558 rotates counterclockwise, the left locking foot 554 engages with the gear disc 551.

[0065] The adjustment unit 557 can be configured with two settings or without restrictions on the number of settings. Generally, for ease of operation, it is set to two settings. When the adjustment unit 557 is moved to the far right, it is locked by the snap-fit ​​structure of the housing 1, and the right-side locking foot 554 engages with the gear disc 551 for self-locking (not shown in the figure). When the adjustment unit 557 is moved to the far left, it is locked by the snap-fit ​​structure of the housing 1, and the left-side locking foot 554 engages with the gear disc 551 for self-locking (e.g., ...). Figure 1 (As shown).

[0066] Example 4:

[0067] To facilitate easier assembly, disassembly, and transport of the guide wire, improvements were made based on Examples 1-3.

[0068] See Figure 5In an optional embodiment, the housing 1 is provided with a groove 11 for placing the object to be transported. The groove 11 is elongated from left to right. The guide wire 11 is placed in the groove 11 for better transport. The groove 11 is also provided with several notches to facilitate the entry of the driving pressure roller 41 and the driven pressure roller 42 through the notches to press the guide wire.

[0069] See Figure 8 and Figure 9 In an optional embodiment, the housing 1 is provided with a flip cover 12, and the flip cover 12 is provided with a pressing block 121 for pressing the conveyed material into the groove 11. The flip cover 12 can be opened from the side. During the conveying process, in order to prevent the guide wire from dislodging from the groove 11, after the flip cover 12 is closed, the pressing block 121 on the flip cover 12 seals the opening of the groove 11 and can fix the guide wire. The housing 1 can be made transparent to facilitate observation of the internal situation from the outside.

[0070] See Figure 6 , Figure 8 and Figure 9 In an optional embodiment, the housing 1 is provided with a slider 13, and the driven pressure roller 42 is disposed on the slider 13. The flip cover 12 is provided with a cam 122. During the closing process of the flip cover 12, the cam 122 pushes the driven pressure roller 42 towards the driving pressure roller 41. During the opening process of the flip cover 12, the slider 13 drives the driven pressure roller 42 away from the driving pressure roller 41, increasing the distance between the driven pressure roller 42 and the driving pressure roller 41, thus better placing the guide wire into the groove 11. During the closing process of the flip cover 12, the cam 122 pushes the slider 13, causing the driven pressure roller 42 to approach the driving pressure roller 41 and press against the guide wire. Before the driven pressure roller 42 presses against the guide wire, the pressure block 121 presses the guide wire into the corresponding position. This allows for better guide wire transport and prevents excessive guide wire deviation, which could lead to poor transport.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A variable speed conveyor comprising a housing (1), a paddle wheel (8) rotatably arranged in the housing (1), and a variable speed device arranged in the housing (1); characterized in that: The dial wheel (8) has two, set in the left and right sides of the shell (1), respectively, fast dial wheel and slow dial wheel, the transmission device includes driving wheel (2) and with the driving wheel (2) engaging driven wheel (3), in each said dial wheel (8) is provided with a driving wheel (2), the driving wheel (2) and the driven wheel (3) one by one engagement and form different gear ratio; The fast dial wheel includes dial wheel (8) on the concentric connection with a large driving wheel (2), the large driving wheel (2) engaging small driven wheel (3); The slow dial wheel includes dial wheel (8) on the concentric connection with a small driving wheel (2), small driving wheel (2) engaging large driven wheel (3); The driven wheel (3) drive a conveying device (4) to convey the conveying object; The conveying device (4) includes driving wheel (41) driven by the driven wheel (3) and rotatably disposed in the shell (1) driven wheel (42), the driving wheel (41) and the driven wheel (42) between the conveying object is provided; The driving wheel (41) is one or more, each said driving wheel (41) is provided with a pinch wheel gear (43), the pinch wheel gear (43) is connected by the intermediate gear (44) between, one of the driving wheel (41) is driven by the driven wheel (3); The shell (1) is also provided with a resistance device (6), the resistance device (6) includes spring (61) and the sliding block (62) connected with the spring (61), the sliding block (62) part from the shell (1) extends out, the sliding block (62) and driving wheel (41) are connected, the right end of the spring (61) and the shell (1) are fixedly connected and the left end is connected with the sliding block (62), the shell (1) is provided with space for sliding block (62) sliding, the conveying device (4) is arranged in the sliding block (62) and moves together with it; The shell (1) is provided with a groove (11) for placing the conveying object; The groove (11) is long strip from left to right and the conveying object is placed in the groove (11), the groove (11) is also provided with a plurality of notches and is used for driving the pinch wheel (41) and the driven wheel (42) to press the conveying object from the notch; The shell (1) is provided with a cover (12), the cover (12) is provided with a pressure block (121) for pressing the conveying object into the groove (11), the shell (1) is provided with a sliding block (13), and the driven wheel (42) is arranged on the sliding block (13); The cover (12) is provided with a cam (122), and in the process of covering the cover (12), the cam (122) pushes the driven wheel (42) to move in the direction close to the driving wheel (41).

2. The variable speed conveyor of claim 1, wherein: The driven wheel (3) and the conveying device (4) are provided with a self locking mechanism (5).

3. The variable speed conveyor of claim 2, wherein: The self locking mechanism includes a worm (51) installed on the driven wheel (3) and a worm wheel (52) installed on the conveying device (4), and the worm (51) and the worm wheel (52) are engaged.

4. A delivery system characterized by: Using the variable speed conveyor as claimed in any of claims 1-3 to convey a to-be-conveyed object, which is a guidewire, a sheath or a microcatheter.

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