CN113712714A

CN113712714A - Switching wheel set and support imbedding device

Info

Publication number: CN113712714A
Application number: CN202111045102.1A
Authority: CN
Inventors: 吴新; 张文娟
Original assignee: Jiangsu Brightness Medical Devices Co ltd
Current assignee: Jiangsu Brightness Medical Devices Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2021-11-30

Abstract

The invention discloses a switching wheel set and a support introducer, and belongs to the technical field of medical instruments. The switching wheel set comprises a switching wheel, a first reversing wheel and a second reversing wheel which are respectively positioned at two ends of the switching wheel, first matching parts are respectively arranged on two opposite end faces of the switching wheel, the switching wheel set further comprises second matching parts which are respectively arranged on one end faces, close to the switching wheel, of the first reversing wheel and the second reversing wheel, the switching wheel can be matched with the second matching parts on the first reversing wheel or the second reversing wheel through the first matching parts in a first state, the switching wheel is linked with the first reversing wheel or the second reversing wheel, and in a second state, the first matching parts are disengaged from the second matching parts, so that the switching wheel is disconnected from the first reversing wheel and the second reversing wheel. The switching wheel set and the support insert can prevent adverse effects caused by false triggering of a trigger.

Description

Switching wheel set and support imbedding device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a switching wheel set and a support introducer.

Background

The stent implantation refers to a technique of expanding and recanalizing a narrow and blocked blood vessel or cavity by utilizing technologies such as puncture, catheter expansion, balloon catheter expansion and metal stent implantation, and the like, and solves the problem of the traditional surgical blind area. The current stent introducer comprises a handle and a tube assembly, wherein an inner tube in the tube assembly moves relative to an outer tube by pulling a trigger on the handle, so that the release of the stent is completed; the handle is including switching the wheelset, and the switching wheelset can export two-way drive power to drive the pipe assembly and do the action of advancing or retreating, because the precision requirement of support embedder action is higher, the mistake touches the trigger after the support is sent into the assigned position and will make the support of placing in the pipe assembly take place the offset, and the trigger does not possess the function of preventing the mistake and touching in the present support embedder.

Therefore, it is necessary to provide a switching wheel set and a stent introducer to solve the above problems.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided are a switching wheel set and a holder insertion device, which can prevent adverse effects caused by erroneous trigger touching.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a switch wheelset, switch the wheelset including switching the wheel, be located respectively switch first reverse wheel and the second reverse wheel at the both ends of wheel, be provided with first cooperation portion on the relative both ends face of switching the wheel respectively, switch the wheelset still including setting up respectively at first reverse wheel and second reverse wheel and be close to the second cooperation portion on the terminal surface of switching the wheel, under the first state, the switching wheel can be through the cooperation of first cooperation portion with the second cooperation portion on first reverse wheel or the second reverse wheel, makes switching wheel and first reverse wheel or the linkage of second reverse wheel, and under the second state, first cooperation portion and the cooperation portion of second break away from the cooperation, make switching wheel and first reverse wheel and second reverse wheel disconnection.

Furthermore, the switching wheel set further comprises a transmission shaft, one end of the transmission shaft, which is close to the switching wheel, is provided with a transmission end, the transmission end and the first reversing wheel and the second reversing wheel simultaneously realize transmission between intersecting shafts, and the transmission shaft is further provided with an output end for outputting torque.

Furthermore, the first matching portions are a plurality of first convex blocks, the first convex blocks are uniformly arranged on the switching wheel at intervals along the circumferential direction of the switching wheel, the second matching portions are a plurality of second convex blocks corresponding to the first matching portions, and the second convex blocks are uniformly arranged on the first reversing wheel and the second reversing wheel at intervals along the circumferential directions of the first reversing wheel and the second reversing wheel.

Furthermore, the outer ends of the first lug and the second lug are in a sharp angle shape.

Furthermore, the first reversing wheel and the second reversing wheel are both bevel gears, the first reversing wheel and the second reversing wheel are symmetrically arranged, and the transmission end on the transmission shaft is a bevel gear meshed with the first reversing wheel and the second reversing wheel.

Furthermore, the output end is a straight toothed spur gear fixedly arranged on the transmission shaft.

The invention also provides a support imbedding device which comprises a handle, wherein the handle comprises the switching wheel set, the handle further comprises a shell, the switching wheel is rotationally connected to the shell and can slide along the axial direction of the switching wheel, and the first reversing wheel and the second reversing wheel are rotationally connected to the shell.

Furthermore, the two end faces of the switching wheel are respectively provided with a bearing shaft extending along the axial direction of the switching wheel, the shell is provided with a bearing block corresponding to the switching wheel, the bearing block is provided with a through hole extending along the axial direction of the bearing shaft, and the two bearing shafts of the switching wheel are rotatably and slidably arranged in the through hole of the bearing block.

Furthermore, the first reversing wheel and the second reversing wheel are respectively and rotatably arranged on the two bearing blocks.

Further, switch the wheelset still including being used for promoting to switch the gliding button of wheel, the button is equipped with two, and two buttons are located respectively switch the both ends of wheel to wear to locate respectively slidable in the through-hole, in addition, the button is kept away from the one end that switches the wheel and is extended to the casing is outside.

The invention has the beneficial effects that: the switching wheel set comprises a switching wheel, a first reversing wheel and a second reversing wheel, wherein the first reversing wheel and the second reversing wheel are respectively positioned at two ends of the switching wheel, first matching parts are respectively arranged on two opposite end faces of the switching wheel, the switching wheel set further comprises second matching parts respectively arranged on one end faces, close to the switching wheel, of the first reversing wheel and the second reversing wheel, the switching wheel can be matched with the second matching parts on the first reversing wheel or the second reversing wheel through the first matching parts in a first state, so that the switching wheel is linked with the first reversing wheel or the second reversing wheel, and in a second state, the first matching parts are disengaged from the second matching parts, so that the switching wheel is disconnected with the first reversing wheel and the second reversing wheel.

Drawings

The invention is further illustrated by the following figures and examples.

In the figure: FIG. 1 is a schematic view of a handle of the stent introducer of the present invention;

FIG. 2 is a perspective view of the handle of FIG. 1 with one side of the housing omitted;

FIG. 3 is a cross-sectional view of the housing of the handle of FIG. 1;

FIG. 4 is a cross-sectional view of the handle shown in FIG. 1, the cross-section passing through the axis of the caster wheel of the drive wheel set;

FIG. 5 is a schematic view of the position relationship between the driving wheel set and the switching wheel set in the handle;

FIG. 6 is an exploded schematic view of the drive wheel set shown in FIG. 5;

FIG. 7 is a cross-sectional view of the handle shown in FIG. 1, the cross-section passing through the axes of the switching wheels of the switching wheel set;

FIG. 8 is an exploded view of the switching wheelset without the transmission shaft;

FIG. 9 is a cross-sectional view of the linear drive assembly in the handle;

FIG. 10 is a schematic view of the position relationship between the tube assembly of the stent placement device and the linear drive assembly in the handle according to the present invention.

1. A handle; 100. a housing; 110. a first shaft seat; 120. a second shaft base; 130. a bearing block; 131. a through hole; 140. a guide port; 200. a trigger; 210. a rack; 220. a reset member; 300. a driving wheel set; 310. a rotary wheel; 311. a first ratchet; 3111. a holding wall; 3112. a separation wall; 312. a rotating shaft; 320. a driving wheel; 321. a second ratchet; 322. an end shaft; 330. an elastic member; 400. switching wheel sets; 410. a switching wheel; 411. a first mating portion; 412. a bearing shaft; 420. a first reversing wheel; 430. a second reversing wheel; 440. a second mating portion; 450. a drive shaft; 451. a transmission end; 460. a button; 500. a linear drive assembly; 510. a thimble; 511. a guide portion; 512. a sliding part; 520. a drive rod; 521. a cavity; 522. a helical groove; 600. and a bearing.

2. A tube assembly; 21. an outer tube; 22. an inner tube; 3. and (4) a bracket.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

The invention provides a support imbedding device, as shown in fig. 1 and 2, which comprises a handle 1, wherein the handle 1 comprises a shell 100, a trigger 200 movably arranged on the shell 100, a driving wheel set 300, a switching wheel set 400 and a linear driving assembly 500, the linear driving assembly 500 comprises an ejector pin 510, and the ejector pin 510 is driven to linearly reciprocate on the shell 100 by pulling the trigger 200 when the linear driving assembly is used.

Referring to fig. 10, the stent inserter of the present invention further includes a tube assembly 2, wherein the tube assembly 2 includes an outer tube 21 and an inner tube 22, and when in use, the thimble 510 drives the outer tube 21 and the inner tube 22 to move relatively, so as to drive the stent 3 to move.

The housing 100 is a gun-shaped structure with a hollow interior for being held by a user, and more precisely, in the present embodiment, the housing 100 is a splicing structure for being easily disassembled.

As shown in fig. 4 and 5, the driving wheel assembly 300 includes a caster wheel 310 rotatably coupled to the housing 100.

More specifically, as shown in fig. 6, two ends of the rotary wheel 310 are respectively and integrally provided with a rotary shaft 312 extending along the axial line of the rotary wheel 310, and referring to fig. 3, two first shaft seats 110 are fixedly provided on the housing 100 corresponding to the rotary shafts 312 on the rotary wheel 310, and the rotary shafts 312 on the rotary wheel 310 are respectively and rotatably connected to the first shaft seats 110 on the corresponding sides, so that the rotary wheel 310 is rotatably connected to the housing 100.

The driving wheel set 300 is used for converting the reciprocating motion of the trigger 200 into a driving force along a single direction, and further, the driving wheel set 300 further comprises a driving wheel 320 and an elastic member 330, the driving wheel 320 is arranged opposite to the revolving wheel 310, the driving wheel 320 can rotate relative to the revolving wheel 310, and in addition, the driving wheel 320 can slide relative to the revolving wheel 310 along the approximate axial direction of the revolving wheel 310; in a more exact embodiment, as shown in fig. 6, an end shaft 322 extending along the axial direction of the driving wheel 320 is fixedly disposed at one end of the driving wheel 320 far away from the revolving wheel 310, a second shaft seat 120 is fixedly disposed on the casing 100 near the end shaft 322 at the upper end of the driving wheel 320, and the end shaft 322 on the driving shaft 320 is rotatably and slidably mounted on the second shaft seat 120, more exactly, referring to fig. 4, the center of the driving wheel 320 is hollow and penetrates through two opposite end faces of the driving wheel 320 to avoid the rotating shaft 312 on the revolving wheel 310; in another embodiment, not shown, the driving wheel 320 is rotatably and slidably disposed on the rotating shaft 312 at one end of the revolving wheel 310, so that the driving wheel 320 can rotate relative to the revolving wheel 310, and the driving wheel 320 can reciprocate linearly relative to the revolving wheel 310.

Further, as shown in fig. 6, one end surface of the revolving wheel 310 close to the driving wheel 320 is fixedly provided with a plurality of first ratchets 311, in this embodiment, the first ratchets 311 are provided, and the plurality of first ratchets 311 are uniformly distributed on the revolving wheel 310 along the circumferential direction of the revolving wheel 310; a second ratchet 321 corresponding to the first ratchet 311 on the revolving wheel 310 is arranged on one end surface of the transmission wheel 320 close to the revolving wheel 310, and in the same embodiment, a plurality of second ratchets 321 are fixedly arranged along the circumferential direction of the transmission wheel 320; the second ratchet 321 is used for enabling the revolving wheel 310 to rotate along with the transmission wheel 320 by the meshing fit of the second ratchet 321 and the first ratchet 311 when the transmission wheel 320 rotates in a single direction, and to be disengaged from the first ratchet 311 when the transmission wheel 320 rotates reversely; more specifically, the first ratchet 311 includes a holding wall 3111 extending along a substantially radial direction of the rotary wheel 310 and having a high slope with respect to the end surface of the rotary wheel 310, and a separating wall 3112 extending along a substantially radial direction of the rotary wheel 310 and having a low slope with respect to the end surface of the rotary wheel 310, the second ratchet 321 on the transmission wheel 320 is similar to the first ratchet 311, and the second ratchet 321 is disposed opposite to the first ratchet 311 by 180 °, so that when the transmission wheel 320 rotates toward the holding wall 3111 on the first ratchet 311 under the elastic force of the elastic member 330, the second ratchet 321 is held against the holding wall 3111 on the first ratchet 311 to form a pushing force along a circumferential direction of the rotary wheel 310, so that the transmission wheel 320 drives the rotary wheel 310 to rotate along the same direction, and when the transmission wheel 320 rotates toward the separating wall 3112 on the first ratchet 311, the second ratchet 321 slides along the separating wall 3112 on the first ratchet 311, thereby, a pushing force is generated on the transmission wheel 320 along the axial direction of the rotary wheel 310 and away from the rotary wheel 310, so that the transmission wheel 320 slides in a direction away from the rotary wheel 310, thereby disengaging the second ratchet teeth 321 from the first ratchet teeth 311, and disconnecting the rotary wheel 310 from the transmission wheel 320.

The elastic member 330 is used to elastically support the driving wheel 320 against the revolving wheel 310, so that the second ratchet 321 on the driving wheel 320 abuts against the first ratchet 311 on the revolving wheel 310, so that when the driving wheel 320 rotates in a single direction, the second ratchet 321 is meshed with the first ratchet 311, and when the driving wheel 320 rotates in a reverse direction, the second ratchet 321 is disengaged from the first ratchet 311, more precisely, in this embodiment, the elastic member 330 is a coil spring, and the elastic member 330 is installed at one end of the driving wheel 320 away from the revolving wheel 310 in a compressed state.

In one embodiment, two driving wheels 320 are provided, and two driving wheels 320 are symmetrically provided at both ends of the revolving wheel 310, it is understood that only one driving wheel 320 may be provided.

The trigger 200 is used for driving the driving wheel 320 to rotate forward and backward alternately; in one embodiment, the trigger 200 is slidably mounted on the housing 100 along the transmission wheel 320, and the trigger 200 is fixedly mounted with the driving block 210 corresponding to the transmission wheel 32, in this embodiment, the driving block 210 and the transmission wheel 320 are in transmission connection through a gear-rack meshing structure, and in other embodiments, not shown, the driving block 210 and the transmission wheel 320 can also be in transmission connection through a friction transmission manner; in another embodiment, not shown, the trigger 200 may be further fixedly connected to the transmission wheel 320, such that the trigger 200 can swing relative to the housing 100, and when in use, the trigger 200 is rotated toward the housing 100 to rotate the trigger 200 and the connected transmission wheel 320.

In one embodiment, a reset member 220 is further mounted on the trigger 200, and the reset member 220 is used for forcing the trigger 200 to return to reset after the trigger 200 is completely fired; in one embodiment, the reset piece 220 is a coil spring, the reset piece 220 is disposed at a position of the trigger 200 close to the firing direction, the reset piece 220 is in a compressed state and is respectively connected to the housing 100 and the trigger 200, so that after the trigger 200 is fired by being buckled, the trigger 200 is pushed to reset by the elastic restoring force of the reset piece 220; in another embodiment, not shown, the reset member 220 may be disposed at a position away from the trigger 200 in the firing direction, and the reset member 220 is stretched and connected to the housing 100 and the trigger 200 respectively, and is also capable of pulling the trigger 200 to reset by the elastic restoring force of the reset member 220 after the trigger 200 is fired.

Referring to fig. 5, the switching wheel group 400 includes a switching wheel 410, a first diverting wheel 420, a second diverting wheel 430, and a transmission shaft 450 for outputting power of circumferential motion.

The switching wheel 410 is rotatably connected to the housing 100, and the switching wheel 410 can slide along the axial direction of the switching wheel 410, more precisely, as shown in fig. 7 and 8, two end faces of the switching wheel 410 are respectively and integrally provided with a bearing shaft 412 extending along the axial direction of the switching wheel 410, and referring to fig. 3, two inner side walls of the housing 100 opposite to each other are integrally provided with a bearing block 130 corresponding to the switching wheel 410, the bearing block 130 is provided with a through hole 131 extending along the axial direction of the bearing shaft 412, and the two bearing shafts 412 of the switching wheel 410 are rotatably and slidably mounted in the through hole 131 of the bearing block 130, so that the switching wheel 410 can not only rotate on the housing 100 along the circumferential direction, but also the switching wheel 410 can perform linear reciprocating motion on the housing 100 along the axial direction.

The axis of the switching wheel 410 is approximately parallel to the axis of the turning wheel 310, and the switching wheel 410 is in transmission connection with the turning wheel 310 in the driving wheel set 300, so that the switching wheel 410 can rotate along with the turning wheel 310, and meanwhile, the switching wheel 410 can also slide along the axial direction of the switching wheel 410 relative to the turning wheel 310; in a specific embodiment, the switching wheel 410 and the rotary wheel 310 are connected in a matching manner through a spur gear transmission, in this embodiment, the switching wheel 410 and the rotary wheel 310 are both spur gears, it is understood that the switching wheel 410 and the rotary wheel 310 may also be helical gears; in another embodiment, not shown, the switching wheel 410 and the swivel wheel 310 may be in transmission connection by means of friction transmission.

The first direction wheel 420 and the second direction wheel 430 are respectively located at two ends of the switching wheel 410 and are disposed opposite to the switching wheel 410, and both the first direction wheel 420 and the second direction wheel 430 are rotatably connected to the housing 100, more specifically, as shown in fig. 7, the first direction wheel 420 and the second direction wheel 430 are respectively rotatably sleeved on two bearing blocks 130 on the housing 100, so that the first direction wheel 420 and the second direction wheel 430 are rotatably connected to the housing 100.

Referring to fig. 8, in addition, the switching wheel 410 is provided with first engaging portions 411 on two opposite end surfaces, and correspondingly, the switching wheel assembly 400 further includes second engaging portions 440, and the end surfaces of the first reversing wheel 420 and the second reversing wheel 430, which are close to the switching wheel 410, are provided with second engaging portions 440, respectively, so that in the first state, the switching wheel 410 can be engaged with the second engaging portions 440 on the first reversing wheel 420 or the second reversing wheel 420 through the first engaging portions 411, so that the switching wheel 410 is linked with the first reversing wheel 420 or the second reversing wheel 420; in the second state, the first engaging portion 411 is disengaged from the second engaging portion 440, so that the switching wheel 410 is disconnected from the first diverting wheel 420 and the second diverting wheel 420; in a specific embodiment, the first matching portion 411 is a plurality of first protrusions, the plurality of first protrusions are uniformly and intermittently disposed on the end surface of the switching wheel 410 along the circumferential direction of the switching wheel 410, the second matching portion 440 is a plurality of second protrusions corresponding to the first matching portion 411, the plurality of second protrusions are uniformly and intermittently disposed on the end surface of the first reversing wheel 420 and the second reversing wheel 430 along the circumferential direction of the first reversing wheel 420 and the second reversing wheel 430, so that when the switching wheel 410 abuts against the first reversing wheel 420 or the second reversing wheel 430 at one end, the first matching portion 411 and the second matching portion 440 are engaged with each other to realize circumferential limitation, so that when the switching wheel 410 rotates, the first reversing wheel 420 or the second reversing wheel 430 can be thrust along the circumferential direction to drive the first reversing wheel 420 or the second reversing wheel 430 to rotate in the same direction, and more precisely, the outer ends of the first protrusions and the second protrusions are pointed, the first matching part 411 and the second matching part 440 are more easily engaged in place, and it can be understood that the first matching part 411 and the second matching part 440 can also be a matching manner of a bump and a groove; in another embodiment, not shown, the first engaging portion 411 of the switching wheel 410 and the second engaging portion 440 of the first diverting wheel 420 and the second diverting wheel 430 are engaged friction plates, so that when the switching wheel 410 is engaged with the first diverting wheel 420 or the second diverting wheel 430 on one side, the first diverting wheel 420 or the second diverting wheel 430 rotates along with the switching wheel 410 in the same direction by generating a required friction force between the first engaging portion 411 and the second engaging portion 440.

The transmission shaft 450 is rotatably mounted on the housing 100, and the axis of the transmission shaft 450 is substantially perpendicular to the axis of the switching wheel 410, and one end of the transmission shaft 450 near the switching wheel 410 is provided with a transmission end 451, and the transmission end 451 is used for enabling the transmission shaft 450 and the first and second direction-changing wheels 420 and 430 to simultaneously realize transmission between intersecting shafts; in a specific embodiment, the first reversing wheel 420 and the second reversing wheel 430 are both bevel gears, the first reversing wheel 420 and the second reversing wheel 430 are symmetrically arranged, and the transmission end 451 on the transmission shaft 450 is a bevel gear meshed with the first reversing wheel 420 and the second reversing wheel 430, so that the transmission end 451 and the first reversing wheel 420 and the second reversing wheel 430 realize transmission between intersecting shafts through the bevel gears; in another embodiment, not shown in the figures, the circular arc side surfaces of the first reversing wheel 420 and the second reversing wheel 430 are conical surfaces, the first reversing wheel 420 and the second reversing wheel 430 are symmetrically arranged, the circular arc side surface of the transmission end 451 on the transmission shaft 450 is also conical surface, and the transmission shaft 450 is in contact with the first reversing wheel 420 and the second reversing wheel 430 through the conical surfaces, so that the transmission shaft 450 is in transmission connection with the first reversing wheel 420 and the second reversing wheel 430 through a friction transmission mode.

An end of the transmission shaft 450, which is far from the transmission end 451, is provided with an output end (not marked in the figure) for outputting torque, and in the present embodiment, the output end is a spur gear fixedly arranged on the transmission shaft 450, but is not limited thereto.

In a specific embodiment, the switching wheel set 400 further includes two buttons 460, in this embodiment, two buttons 460 are respectively located at two ends of the switching wheel 410 and are respectively slidably disposed through the through hole 131 on the housing 100, and an end of the button 460 far away from the switching wheel 410 extends to the outside of the housing 100, so that a user can push the switching wheel 410 out of the housing 100 to slide in the axial direction.

Therefore, when the switching wheel 410 is pushed to be connected with the first direction-changing wheel 420 on one side along the axial direction and the trigger 200 is pulled to drive the rotary wheel 310 in the driving wheel set 300 to rotate along a single direction, the rotary wheel 310 will drive the switching wheel 410 to rotate along a single direction along the opposite direction and drive the transmission shaft 450 to rotate through the first direction-changing wheel 420; when the switching transmission shaft 450 needs to rotate along the other direction, the switching wheel 410 is only required to be pushed to be connected with the second reversing wheel 430 on the other side along the axial direction, at this time, the second reversing wheel 430 is driven to rotate along with the switching wheel 410 in the same direction, and the second reversing wheel 430 and the first reversing wheel 420 rotate in the opposite direction, so that the transmission shaft 450 is driven to rotate along the other direction; when the transmission between the transmission shaft 450 and the trigger 200 needs to be cut off, the switching wheel 410 is pushed to the position just in the middle of the first reversing wheel 420 and the second reversing wheel 430, so that the switching wheel 410 is not connected with the first reversing wheel 420 or the second reversing wheel 430, and even if the trigger 200 acts to drive the switching wheel 410 to rotate, the torque cannot be transmitted to the transmission shaft 450.

Referring to fig. 2, the linear drive assembly 500 further includes a drive rod 520 rotatably coupled to the housing 100.

The axis of the driving rod 520 is approximately parallel to the axis of the transmission shaft 450 in the switching wheel set 400, and the driving rod 520 is in transmission connection with the transmission shaft 450; in a specific embodiment, a spur gear is fixedly installed at one end of the driving rod 520 close to the output end of the transmission shaft 450, so that the driving rod 520 and the transmission shaft 450 realize transmission between two parallel shafts through the spur gear; in another embodiment, not shown, the outer cylindrical surface of the drive rod 520 is in intimate contact with the outer cylindrical surface of the output end of the drive shaft 450, and the drive rod 520 is drivingly connected to the drive shaft 450 by friction drive.

In one embodiment, two ceramic bearings are installed on the housing 100 at intervals corresponding to the driving rod 520, and the driving rod 520 is installed in the inner race of the ceramic bearings, so that the driving rod 520 can smoothly rotate on the housing 100.

Referring to fig. 9, a cavity 521 is formed in the center of the driving rod 520 and extends along the axial direction of the driving rod 520, the cavity 521 penetrates through two opposite end faces of the driving rod 520, a spiral groove 522 spiraling along the circumferential direction of the driving rod 520 is further formed in the driving rod 520, and the spiral groove 522 penetrates through the inner and outer circular arc sidewalls of the driving rod 520.

The thimble 510 is accommodated in the cavity 521 of the driving rod 520, the thimble 510 is integrally provided with a guiding portion 511, further, the housing 100 is provided with a guiding opening 140, a length direction of the guiding opening 140 is parallel to an axial line of the driving rod 520, the guiding portion 511 is accommodated in the guiding opening 140 via a spiral groove 522, so that the thimble 510 can be driven to slide on the housing 100 along a straight line by the rotation of the driving rod 520, specifically, the guiding portion 511 of the thimble 510 is integrally provided with a sliding portion 512 located outside the driving rod 520, and referring to fig. 7, the sliding portion 512 is in an "i" shape structure, and the sliding portion 512 is slidably embedded in the guiding opening 140. Therefore, when the driving rod 520 rotates, the spiral groove 522 pushes the thimble 510 along the length direction of the guiding opening 140, and the thimble 510 is pushed to reciprocate linearly on the housing 100.

Referring to fig. 10, the outer tube 21 of the tube assembly 2 is accommodated in the cavity 521 of the driving rod 520, and the outer tube 21 is fixedly connected to the thimble 510, the inner tube 22 is accommodated in the outer tube 21, and the inner tube 22 is fixed relative to the housing 100, when in use, the thimble 510 drives the outer tube 21 to move axially relative to the inner tube 22 until the outer end port of the outer tube 21 can accommodate the bracket 33, the bracket 33 is retracted in the radial direction and then placed in the outer tube 21, and one end of the bracket 33 close to the handle 1 abuts against the inner tube 22, when the bracket 3 is delivered to a lesion position in a human body, the thimble 510 is driven to drive the outer tube 21 to move relative to the inner tube 22 in a direction close to the handle 1, because the inner tube 22 abuts against one end of the bracket 3 close to the handle 1, so that the bracket 3 is forced to be continuously exposed from the outer tube 21 when the outer tube 21 is moved until the bracket 3 is completely exposed from the outer tube 21 and then returns to the original shape by virtue of the characteristics of the bracket 3 itself, and spread out over the lesion.

Therefore, the stent introducer of the invention has at least the following beneficial effects:

the support embedding device comprises a handle 1, the handle 1 comprises a shell 100, a trigger 200, a driving wheel set 300 and a switching wheel set 400, the switching wheel set comprises a switching wheel 410, a first reversing wheel 420 and a second reversing wheel 430 which are respectively positioned at two ends of the switching wheel 410, and a transmission shaft 450, the switching wheel 410 is rotatably connected to the shell 100, the switching wheel 410 can slide along the axial direction of the switching wheel 410, the first reversing wheel 420 and the second reversing wheel 430 are both rotatably connected to the shell 100, two opposite end faces of the switching wheel 410 are respectively provided with a first matching part 411, the switching wheel set 400 further comprises a second matching part 440 which is respectively arranged on one end face of the first reversing wheel 420 and one end face of the second reversing wheel 420 close to the switching wheel 410, so that when the switching wheel 410 slides along the axial direction and is attached to the first reversing wheel 420 or the second reversing wheel 430, the first matching part 411 and the second matching part 440 can be matched with each other to realize circumferential limit, the transmission shaft 450 is rotatably connected to the housing 100, a transmission end 451 is arranged at one end of the transmission shaft 450 close to the switching wheel 410, the transmission end 451 is used for simultaneously realizing transmission between intersecting shafts of the transmission shaft 450, the first reversing wheel 420 and the second reversing wheel 430, an output end for outputting torque is further arranged on the transmission shaft 450, the driving wheel set 300 is used for converting reciprocating motion of the trigger 200 into driving force along a single direction so as to drive the switching wheel 410 to rotate along a single direction, thus, the switching wheel 410 is only required to be pushed to the middle position of the first reversing wheel 420 and the second reversing wheel 430, the switching wheel 410 is not connected with the first reversing wheel 420 or the second reversing wheel 430, even if the trigger 200 is touched by mistake to drive the switching wheel 410 to rotate, the torque cannot be transmitted to the transmission shaft 450, and adverse effects caused by mistaken touch of the trigger 200 can be prevented.

In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. A switching wheel assembly, comprising: the switching wheel set comprises a switching wheel, a first reversing wheel and a second reversing wheel, wherein the first reversing wheel and the second reversing wheel are respectively positioned at two ends of the switching wheel, first matching parts are respectively arranged on two opposite end faces of the switching wheel, the switching wheel set further comprises second matching parts respectively arranged on one end faces, close to the switching wheel, of the first reversing wheel and the second reversing wheel, the switching wheel can be matched with the second matching parts on the first reversing wheel or the second reversing wheel through the first matching parts in a first state, so that the switching wheel is linked with the first reversing wheel or the second reversing wheel, and the first matching parts are disengaged from the second matching parts in a second state, so that the switching wheel is disconnected from the first reversing wheel and the second reversing wheel.

2. A switching wheel assembly according to claim 1, wherein: the switching wheel set further comprises a transmission shaft, one end of the transmission shaft, which is close to the switching wheel, is provided with a transmission end, the first reversing wheel and the second reversing wheel simultaneously realize transmission between crossed shafts, and the transmission shaft is further provided with an output end for outputting torque.

3. A switching wheel assembly according to claim 1, wherein: the first matching portions are a plurality of first lugs, the first lugs are evenly arranged on the switching wheel at intervals along the circumferential direction of the switching wheel, the second matching portions are a plurality of second lugs corresponding to the first matching portions, and the second lugs are evenly arranged on the first reversing wheel and the second reversing wheel at intervals along the circumferential directions of the first reversing wheel and the second reversing wheel.

4. A switching wheel assembly according to claim 3, wherein: the outer ends of the first lug and the second lug are in a sharp-horn shape.

5. A switching wheel assembly according to claim 2, wherein: the first reversing wheel and the second reversing wheel are both bevel gears, the first reversing wheel and the second reversing wheel are symmetrically arranged, and the transmission end on the transmission shaft is a bevel gear meshed with the first reversing wheel and the second reversing wheel.

6. A switching wheel assembly according to claim 2, wherein: the output end is a straight toothed spur gear fixedly arranged on the transmission shaft.

7. A stent introducer, characterized by: comprising a handle comprising a switching wheel group according to any one of claims 1 to 6, said handle further comprising a housing, said switching wheel being rotatably connected to said housing and said switching wheel being slidable in an axial direction of the switching wheel, said first and second reversing wheels being rotatably connected to said housing.

8. The stent introducer of claim 7, wherein: the switching wheel is characterized in that two end faces of the switching wheel are respectively provided with a bearing shaft extending along the axial direction of the switching wheel, the shell is provided with a bearing block corresponding to the switching wheel, the bearing block is provided with a through hole extending along the axial direction of the bearing shaft, and the two bearing shafts of the switching wheel are rotatably and slidably arranged in the through hole of the bearing block.

9. The stent introducer of claim 8, wherein: the first reversing wheel and the second reversing wheel are respectively and rotatably arranged on the two bearing blocks.

10. The stent introducer of claim 8, wherein: the switching wheel set further comprises two buttons for pushing the switching wheel to slide, the two buttons are located at two ends of the switching wheel respectively and penetrate through the through holes respectively in a sliding mode, and in addition, one end, far away from the switching wheel, of each button extends to the outside of the shell.