Distraction device

Abstract

The utility model provides a distraction device. The distraction device comprises an insertion assembly used for being inserted into a target object and a supporting structure used for supporting the target object. The driving structure is connected with the insertion assembly, and the driving structure is connected with the supporting structure; the driving structure is movably arranged and has a first motion state and a second motion state; when the driving structure is in a first motion state, the driving structure drives the insertion assembly to enter the target object; when the driving structure is in the second motion state, the driving structure drives the supporting structure to enter the target object, and the technical problem that in the related technology, time and labor are wasted when a channel opening device is operated in the minimally invasive surgery is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to surgical instruments technical field, concretely relates to a distraction device. BACKGROUND

[0002] Spinal minimally invasive surgery has been applied in clinic, and the difference from traditional open surgery is small incision. Therefore, the corresponding instrument shape is different from traditional tools, and most of them are operated by being inserted into the body from the outside through a certain channel. Therefore, minimally invasive channel instruments are developed and applied.

[0003] According to different needs, the channel required by minimally invasive surgery can be divided into non-expandable and expandable types, and can be divided into anterior and posterior channels according to different surgical procedures. The advantage is that it can reduce the trauma related to the approach, but because of the different shapes and materials of the channel, some will block X-rays, and some need to be set with multiple specifications to meet the needs of different internal diameter channels.

[0004] However, the existing channel distraction device has the following problems: the channel distraction device generally needs to be manually operated, which is time-consuming and laborious; after the expansion sheath of the channel distraction device is inserted, the structure above the skin has a large volume, which not only needs to cooperate with a longer sleeve instrument, but also the tightness of the sleeve and the skin is poor during operation. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the above technical defects, and provides a distraction device to solve the technical problem of time-consuming and laborious operation of the channel distraction device in minimally invasive surgery in the related art.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical scheme: a distraction device is provided, which comprises: a support structure, the support structure comprising an insertion assembly for inserting into a target object and a support structure for supporting the target object; a driving structure, the driving structure being connected with the insertion assembly, and the driving structure being connected with the support structure; the driving structure is movably arranged, and the driving structure has a first motion state and a second motion state; when the driving structure is in the first motion state, the driving structure drives the insertion assembly to enter the target object; when the driving structure is in the second motion state, the driving structure drives the support structure to enter the target object.

[0007] Further, the insertion assembly comprises: a hanger; a plurality of hanging bars are rotatably connected with the hanger, and one end of the hanging bar away from the hanger has a sharp part for inserting into the target object; wherein the hanging bar is a plurality of, and the plurality of hanging bars are arranged around.

[0008] Further, the distraction device comprises a base rod, the base rod is fixedly connected with the hanger; the plurality of hanging bars are arranged around the base rod; the support structure is sleeved on the base rod, and the support structure is movably arranged along the extension direction of the base rod.

[0009] Further, the hanging strip is provided with a guide strip which protrudes from the surface of the hanging strip; the support structure is provided with a guide groove; the guide groove is matched with the guide strip; when the driving structure is in the first movement state, the guide strip is inserted into the guide groove; when the driving structure is in the second movement state, the support structure moves along the extension direction of the guide strip.

[0010] Further, the base rod has a containing channel; the driving structure comprises a lead screw which is inserted into the containing channel and is rotatably arranged; the support structure is threadedly connected with the lead screw.

[0011] Further, the distraction device further comprises a power rod which is inserted into the base rod and is fixedly connected with the lead screw and is rotatably arranged; a connecting ring which is arranged on the base rod and is rotatably connected with the end of the lead screw which is away from the power rod.

[0012] Further, the power rod comprises a first rod body which is fixedly connected with the lead screw and is arranged with a first ratchet disc in the base rod; a second ratchet disc which is sleeved on the first rod body and is matched with the first ratchet disc; a second rod body which is connected with the first rod body; a first elastic member which is sleeved on the first rod body, one end of the first elastic member is connected with the second rod body, and the other end of the first elastic member is connected with the base rod; the second rod body is arranged with an annular connecting groove, and the second rod body is rotatably arranged in the base rod by arranging a fastener in the base rod and the connecting groove.

[0013] Further, the power rod comprises a third rod body which is connected with the end of the second rod body which is away from the first rod body; the driving structure further comprises a third ratchet disc which is connected with the base rod; a fourth ratchet disc which is rotatably arranged and is matched with the third ratchet disc; wherein the locking direction of the first ratchet disc and the second ratchet disc is the first direction, the locking direction of the third ratchet disc and the fourth ratchet disc is the second direction; the first direction is the same as the second direction; the third rod body passes through the third ratchet disc and the fourth ratchet disc.

[0014] Further, the third rod body is arranged with a strip-shaped hole, the third rod body is connected with the third ratchet disc by inserting a fastener into the third ratchet disc and the strip-shaped hole; the distraction device comprises a second elastic member which is sleeved on the base rod; one end of the second elastic member is connected with the annular protrusion of the base rod, and the other end of the second elastic member is connected with the third ratchet disc.

[0015] Further, the driving structure comprises a power platform; the power platform is movably arranged, the power platform has an output shaft which is rotatably arranged, and the output shaft is connected with the distraction device.

[0016] Beneficial effects:

[0017] The utility model discloses a strutting device, which comprises a support structure, the support structure comprises an insertion assembly for inserting a target object and a support structure for supporting the target object; a driving structure connected with the insertion assembly, the driving structure is connected with the support structure; the driving structure is movably arranged, the driving structure has a first motion state and a second motion state; when the driving structure is in the first motion state, the driving structure drives the insertion assembly to enter the target object; when the driving structure is in the second motion state, the driving structure drives the support structure to enter the target object, which solves the technical problem of time-consuming and laborious operation of the channel strutting device in minimally invasive surgery in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structure schematic diagram of the strutting device that the utility model embodiment adopts;

[0019] Figure 2 is the explosion drawing of the strutting device that the utility model embodiment adopts;

[0020] Figure 3 is the front view of the explosion drawing of the strutting device that the utility model embodiment adopts;

[0021] Figure 4 is the front view of the strutting device that the utility model embodiment adopts;

[0022] Figure 5 is the sectional view of the strutting device in A-A direction in Figure 4

[0023] Figure 6 is the structure schematic diagram of the first state of the strutting device that the utility model embodiment adopts;

[0024] Figure 7 is the structure schematic diagram of the second state of the strutting device that the utility model embodiment adopts;

[0025] Figure 8 is the structure schematic diagram of the third state of the strutting device that the utility model embodiment adopts;

[0026] Figure 9 is the structure schematic diagram of the power rod of the strutting device that the utility model embodiment adopts;

[0027] Figure 10 is the structure schematic diagram of the support structure of the strutting device that the utility model embodiment adopts.

[0028] Among them, the above-mentioned drawing includes following figure marks:

[0029] ​10, insertion assembly; 20, support structure; 201, guide groove; 1, hanger; 2, hanging strip; 21, sharp part; 22, guide strip; 3, base rod; 4, screw rod; 5, power rod; 51, first rod body; 52, second rod body; 521, connecting groove; 53, third rod body; 6, connecting ring; 61, first ratchet disc; 62, second ratchet disc; 63, third ratchet disc; 64, fourth ratchet disc; 71, first elastic member; 72, second elastic member; 73, third elastic member; 8, hand rotating disc; 9, power platform. DETAILED DESCRIPTION

[0030] In order to enable personnel in the technical field to better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts should fall within the scope of protection of the present application.

[0031] Referring to Figures 1 to 10 According to the utility model embodiments, a kind of distraction device is provided, comprising: support structure, the support structure includes for inserting target object insertion assembly 10 and for supporting target object support structure 20;Drive structure, the drive structure is connected with the insertion assembly 10, the drive structure is connected with the support structure 20;The drive structure is movably arranged, the drive structure has first motion state and second motion state;When the drive structure is in first motion state, the drive structure drives insertion assembly 10 to enter the target object;When the drive structure is in second motion state, the drive structure drives support structure 20 to enter the target object.

[0032] With the above setting, when surgery, insertion assembly 10 is inserted into human body using drive structure, then, support structure 20 is driven into the inserted human body using drive assembly, thereby forming distraction channel, the whole process achieves the effect of automatic control, replaces manual operation, saves time and effort, solves the technical problem of time-consuming and laborious operation of channel distraction device in minimally invasive surgery in the related art.

[0033] Specifically, the drive device of the embodiment can drive insertion assembly 10 to move and rotate. During the movement and rotation of insertion assembly 10, the human body is contacted, which is more conducive to the smooth entry of insertion assembly 10 into the human body.

[0034] Referring to Figure 1In the spreading device of this embodiment, the insertion component 10 includes: a bracket 1; a hanging strip 2, a plurality of hanging strips 2 being rotatably connected to the bracket 1, and the end of the hanging strip 2 away from the bracket 1 having a spike 21 for inserting a target object; wherein, there are a plurality of hanging strips 2, and the plurality of hanging strips 2 are arranged around each other.

[0035] Specifically, when the spreading device approaches the human body, the spikes 21 of the multiple hanging strips 2 contact and pierce the human body, thereby driving the entire spreading device into the human body and carrying the support structure 20 into the human body. The multiple hanging strips 2 are arranged in a ring to form a ring-shaped piercing structure, which is conducive to the precise positioning of the spreading device.

[0036] See Figure 1 , Figure 2 In the spreading device of this embodiment, the spreading device includes a base rod 3, which is fixedly connected to the hanger 1; a plurality of hanging strips 2 are arranged around the base rod 3; and a support structure 20 is sleeved on the base rod 3 and is movably arranged along the extension direction of the base rod 3.

[0037] With the above setup, when the hanging strip 2 is inserted into the human body, the support structure 20 begins to move. The moving support structure 20 pushes the hanging strip 2, causing multiple hanging strips 2 to open outwards and stretch the surrounding tissue.

[0038] In the spreading device of this embodiment, see Figure 2 The hanging strip 2 is provided with a guide strip 22, which protrudes from the surface of the hanging strip 2; the support structure 20 is provided with a guide groove 201; the guide groove 201 matches the guide strip 22; when the driving structure is in the first movement state, the guide strip 22 is inserted into the guide groove 201; when the driving structure is in the second movement state, the support structure moves along the extension direction of the guide strip 22.

[0039] With the above configuration, when the support structure 20 moves, the support structure 20 moves along the guide bar 22, thereby ensuring that the support structure 20 moves smoothly and at the same time pushes the different guide bars 22 to open, thereby stably supporting the target object.

[0040] In the spreading device of this embodiment, see Figure 2 The base rod 3 has a receiving channel; the driving structure includes a lead screw 4, which passes through the receiving channel and is rotatably disposed; the support structure 20 is threadedly connected to the lead screw 4.

[0041] In order to achieve the effect of driving the support structure 20 to move, a screw rod drive is arranged, which pushes the support structure 20 by rotating the screw rod 4, so that the support structure 20 moves smoothly.

[0042] In the distraction device of the embodiment, referring to Figure 2 , the distraction device further comprises a power rod 5, the power rod 5 is inserted into the base rod 3, the power rod 5 is fixedly connected with the screw rod 4, and the power rod 5 is rotatably arranged; a connecting ring 6 is arranged on the base rod 3, and the end of the screw rod 4 away from the power rod 5 is rotatably connected with the connecting ring 6.

[0043] With the above arrangement, the rotation of the screw rod 4 and the rotation of the hanging bar 2 can be simultaneously achieved by driving the power rod 5, which simplifies the structure and improves the surgical efficiency.

[0044] In the distraction device of the embodiment, referring to Figure 2 , Figure 9 , the power rod 5 comprises a first rod body 51, the first rod body 51 is fixedly connected with the screw rod 4, a first ratchet disc 61 is arranged in the base rod 3; a second ratchet disc 62 matched with the first ratchet disc 61 is sleeved on the first rod body 51; a second rod body 52 is connected with the first rod body 51; a first elastic member 71 is sleeved on the first rod body 51, one end of the first elastic member 71 is connected with the second rod body 52, and the other end of the first elastic member 71 is connected with the base rod 3; an annular connecting groove 521 is arranged on the second rod body 52, and a fastener is arranged in the base rod 3 and the connecting groove 521, so that the second rod body 52 is rotatably arranged in the base rod 3.

[0045] Specifically, the screw rod 4 is inserted into the first rod body 51, the first ratchet disc 61 is arranged in the base rod 3; the second ratchet disc 62 matched with the first ratchet disc 61 is sleeved on the first rod body 51. When in the first motion state, the first ratchet disc 61 and the second ratchet disc 62 are clamped and integrally rotated. When the insertion assembly 10 is inserted into the human body, the second motion state is entered, the first rod body 51 drives the screw rod 4 and the first ratchet disc 61 to reverse, at this time the first ratchet disc 61 and the second ratchet disc 62 relatively move, thereby driving the screw rod 4 to rotate and driving the support structure 20 to move.

[0046] The first elastic member 71 is sleeved on the first rod body 51, so that the first ratchet disc 61 and the second ratchet disc 62 are closely matched.

[0047] The fastener is arranged in the base rod 3 and the connecting groove 521, so that the second rod body 52 is rotatably arranged in the base rod 3. The second rod body 52 can only make rotary motion relative to the base rod 3.

[0048] In the distraction device of the embodiment, referring to Figure 9 , the power rod 5 comprises a third rod body 53; the third rod body 53 is connected with the second rod body 52 at the end away from the first rod body 51; the driving structure further comprises: a third ratchet disc 63 connected with the base rod 3; a fourth ratchet disc 64 rotatably arranged, the fourth ratchet disc 64 cooperates with the third ratchet disc 63; wherein the locking direction of the first ratchet disc 61 and the second ratchet disc 62 is the first direction, the locking direction of the third ratchet disc 63 and the fourth ratchet disc 64 is the second direction; the first direction is the same as the second direction; the third rod body 53 passes through the third ratchet disc 63 and the fourth ratchet disc 64.

[0049] Referring to Figure 2 , Figures 6 to 8 , with the above arrangement, when in the first movement state, the third ratchet disc 63 and the fourth ratchet disc 64 are clamped and integrally rotated. When the insertion assembly 10 is inserted into the human body, the second movement state is entered, the power rod 5 drives the third ratchet disc 63 to reverse, at this time, the third ratchet disc 63 and the fourth ratchet disc 64 move relatively, thereby driving the lead screw 4 to rotate and driving the support structure 20 to move.

[0050] In the distraction device of the embodiment, the third rod body 53 is provided with a strip-shaped hole, a fastener is arranged in the third ratchet disc 63 and the strip-shaped hole, so that the third rod body 53 is connected with the third ratchet disc 63; the distraction device comprises: a second elastic member 72 sleeved on the base rod 3; one end of the second elastic member 72 is connected with the annular protrusion of the base rod 3, and the other end of the second elastic member 72 is connected with the third ratchet disc 63.

[0051] With the above arrangement, under the first movement state, the third ratchet disc 63 can be closely matched with the fourth ratchet disc 64 under the action of the second elastic member 72, and under the second movement state, when the third ratchet disc 63 can rotate relative to the fourth ratchet disc 64, the third ratchet disc 63 can move axially to ensure that the distraction action is smoothly performed.

[0052] In the distraction device of the embodiment, referring to Figure 2 , the distraction device comprises: a hand rotating disc 8 rotatably connected with the base rod 3; a second elastic member 72, one end of the second elastic member 72 is connected with the base rod 3, and the other end of the second elastic member 72 is connected with the hanging strip 2.

[0053] With the above arrangement, when installing, the hanging strip 2 is pried open by the hand rotating disc 8, so that other structures are conveniently installed.

[0054] In the expansion device of the embodiment, referring to Figure 1 The driving structure comprises a power platform 9; the power platform 9 is movably arranged, and has an output shaft which is rotatably arranged and connected with the expansion device.

[0055] Specifically, the expansion device of the embodiment can be combined with the power platform 9 of the robot, automatically operated under the mechanical arm, or the base is transformed into a holding part, and the hand-held operation is realized through the power tool connection interface.

[0056] The working process of the expansion device of the embodiment is as follows:

[0057] The driving structure drives the whole expansion device to rotate forward, and when rotating forward, the power platform 9 is fixedly connected with the fourth ratchet disc 64, the output shaft of the power platform 9 drives the power rod 5, so that the power rod 5 drives the second ratchet disc 62, and the second ratchet disc 62 drives the first ratchet disc 61, because the first ratchet disc 61 is fixed with the base rod 3, so the power rod 5 and the base rod 3 rotate at the same time, and the supporting structure 20 does not move.

[0058] When rotating reversely, the power platform 9 is fixedly connected with the fourth ratchet disc 64, the rotating shaft of the power platform 9 drives the power rod 5, the power rod 5 drives the second ratchet disc 62 to rotate, but the second ratchet disc 62 cannot drive the first ratchet disc 61 to rotate. When rotating reversely, the third ratchet disc 63 is fixed with the base rod 3, and cannot rotate because of being clamped with the fourth ratchet disc 64, so that the base rod 3 does not move, the power rod 5 rotates, the power rod 5 drives the lead screw 4 to rotate, and the supporting structure 20 moves axially to realize expansion.

[0059] The power platform 9 provides rotating power, drives the lead screw 4 to rotate, gradually pushes the supporting structure 20 to the distal end, and pushes to the skin. During the pushing process, the protrusions of the hanging strips 2 are matched with the grooves of the supporting structure 20, the initially contracted hanging strips 2 are gradually opened along with the movement of the supporting structure 20, and the soft tissues are expanded to the surrounding.

[0060] When the supporting structure 20 is pushed to the skin, the supporting structure 20 is held by the hand or the universal arm, the mechanical arm drives the module to retract, and only the supporting structure 20 is left on the skin. Under the action of the elastic member, after retraction, the hanging strips 2 are retracted.

[0061] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the use of these terms is interchangeable under appropriate circumstances such that the descriptive

[0062] Optionally, the specific examples in the embodiments can refer to the examples described in the above embodiments, and the embodiments will not be described here again.

[0063] The sequence numbers of the above-described embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0064] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0065] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A distraction device, comprising: The utility model relates to a kind of stent expansion devices, including: Support structure, the support structure includes for inserting target object insertion component (10) and for supporting target object support structure (20); Drive structure, the drive structure is connected with the insertion component (10), the drive structure is connected with the support structure (20);The drive structure is movably arranged, the drive structure has first motion state and second motion state; When the drive structure is in first motion state, the drive structure drives the insertion component (10) into the target object; When the drive structure is in second motion state, the drive structure drives the support structure (20) into the target object.

2. The distraction device of claim 1, wherein, The insertion component (10) includes: Hanger (1); Hanging strip (2), a plurality of the hanging strip (2) is rotatably connected with the hanger (1), and the end of the hanging strip (2) away from the hanger (1) has a sharp part (21) for inserting target object; Wherein, the hanging strip (2) is multiple, and multiple hanging strips (2) are arranged around.

3. The distraction device of claim 2, wherein, The stent expansion device includes a base rod (3), the base rod (3) is fixedly connected with the hanger (1);Multiple hanging strips (2) are arranged around the base rod (3);The support structure (20) is sleeved on the base rod (3), and the support structure (20) is movably arranged along the extension direction of the base rod (3).

4. The distraction device of claim 3, wherein, The hanging strip (2) is provided with a guide strip (22), and the guide strip (22) is arranged protruding from the surface of the hanging strip (2);The support structure (20) is provided with a guide groove (201);The guide groove (201) is matched with the guide strip (22);When the drive structure is in the first motion state, the guide strip (22) is inserted into the guide groove (201);When the drive structure is in the second motion state, the support structure moves along the extension direction of the guide strip (22).

5. The distraction device of claim 3, wherein, The base rod (3) has a containing channel therein;The drive structure includes a lead screw (4), the lead screw (4) is arranged in the containing channel, and the lead screw (4) is rotatably arranged;The support structure (20) is threadedly connected with the lead screw (4).

6. The distraction device of claim 5, wherein, The stent expansion device further includes: Power rod (5);The power rod (5) is inserted into the base rod (3), the power rod (5) is fixedly connected with the lead screw (4), and the power rod (5) is rotatably arranged; Connecting ring (6), the connecting ring (6) is arranged on the base rod (3), and the end of the lead screw (4) away from the power rod (5) is rotatably connected with the connecting ring (6).

7. The distraction device of claim 6, wherein, The power rod (5) includes: First rod body (51), the first rod body (51) is fixedly connected with the lead screw (4), and the base rod (3) is provided with a first ratchet disc (61);Second ratchet disc (62) is sleeved on the first rod body (51) and matched with the first ratchet disc (61); A second rod body (52) is connected with the first rod body (51); a first elastic member (71) is sleeved on the first rod body (51), one end of the first elastic member (71) is connected with the second rod body (52), and the other end of the first elastic member (71) is connected with the base rod (3); an annular connecting groove (521) is arranged on the second rod body (52), and the second rod body (52) is rotatably arranged in the base rod (3) by arranging a fastener in the base rod (3) and the connecting groove (521).

8. The distraction device of claim 7, wherein, The power rod (5) comprises a third rod body (53); the third rod body (53) is connected with one end of the second rod body (52) away from the first rod body (51); the driving structure further comprises: A third ratchet disc (63) is connected with the base rod (3); A fourth ratchet disc (64) is rotatably arranged, and the fourth ratchet disc (64) cooperates with the third ratchet disc (63); Wherein, the locking direction of the first ratchet disc (61) and the second ratchet disc (62) is the first direction, the locking direction of the third ratchet disc (63) and the fourth ratchet disc (64) is the second direction; the first direction is the same as the second direction; the third rod body (53) passes through the third ratchet disc (63) and the fourth ratchet disc (64).

9. The distraction device of claim 8, wherein, The third rod body (53) is provided with a strip-shaped hole, and the third rod body (53) is connected with the third ratchet disc (63) by arranging a fastener in the third ratchet disc (63) and the strip-shaped hole; the expansion device comprises: A second elastic member (72) is sleeved on the base rod (3); one end of the second elastic member (72) is connected with the annular protrusion of the base rod (3), and the other end of the second elastic member (72) is connected with the third ratchet disc (63).

10. The distractor of any one of claims 1 to 9, wherein, The driving structure comprises a power platform (9); the power platform (9) is movably arranged, the power platform has an output shaft, the output shaft is rotatably arranged, and the output shaft is connected with the

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