TW202348203A

TW202348203A - Connection structure of screw driver and locking screw

Info

Publication number: TW202348203A
Application number: TW111120358A
Authority: TW
Inventors: 董榮洲; 董浩雲; 郭章一; 曾薇涵; 楊麒諺
Original assignee: 碩果生醫科技有限公司
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2023-12-16
Also published as: TWI802430B

Abstract

A connection structure of screw driver and locking screw is provided, which includes a screw driver and a locking screw. External wall of one axial end of the screw driver has ribs and one first snap. Opposite ends of first snap part has a first outer diameter and a second outer diameter which is smaller than the first outer diameter. A penetration part is disposed on locking screw. Internal wall and external wall of locking screw has grooves and second external thread respectively. Second snap part with a first inside diameter which is smaller than the first outer diameter and bigger than the second outer diameter is disposed in the penetration part. The screw driver inserts into the penetration part of locking screw and ribs engage with grooves. The first snap part goes through the second snap part and is protrude out of the locking screw.

Description

鎖固起子與鎖固螺絲之連接結構Connection structure of locking screwdriver and locking screw

本發明涉及醫學技術領域，尤指一種適合用於鎖固骨釘之連接桿之鎖固起子與鎖固螺絲之連接結構。The present invention relates to the field of medical technology, and in particular, to a connecting structure of a locking driver and a locking screw suitable for locking a connecting rod of a bone nail.

對於有脊椎病症的患者，很容易在椎間盤產生移位、病變、萎縮等問題，導致脊突間隙縮小而壓迫到脊髓神經，因而使患者於背部產生麻痺或疼痛感。For patients with spinal diseases, problems such as displacement, lesions, and atrophy of the intervertebral discs can easily occur, causing the gap between the spinal processes to shrink and compressing the spinal nerves, causing numbness or pain in the patient's back.

為解決上述問題，目前普遍的治療方式為利用骨釘將連桿植入脊椎的微創手術，利用連桿支撐椎體間的相對距離與位置。In order to solve the above problems, the current common treatment method is minimally invasive surgery that uses bone screws to implant connecting rods into the spine, and uses the connecting rods to support the relative distance and position between the vertebral bodies.

依長度的長短，骨釘可分為「短翼釘」與「長翼釘」，而長翼釘又分為開口式與封閉式兩種。由於微創手術在患者的開口很小且開洞深，若採用短翼釘，必須另設置擴張器將開口擴大，以利於手術操作，因此就實用性與操作便利性而言，開口式長翼型骨釘由於可簡化短翼型骨釘的手術過程，因此是本技術領域人士目前喜愛且普遍使用的一種骨釘。According to the length, bone nails can be divided into "short wing nails" and "long wing nails", and long wing nails are divided into two types: open type and closed type. Since the patient's opening in minimally invasive surgery is very small and the hole is deep, if a short wing nail is used, an additional dilator must be installed to expand the opening to facilitate the surgical operation. Therefore, in terms of practicality and convenience of operation, the open-type long wing nail Because the short wing-shaped bone nail can simplify the surgical process of the short wing-shaped bone nail, it is currently a favorite and commonly used bone nail by people in the art.

針對習知開口式長翼型骨釘之結構，其主要由一定位套與一螺釘構成。定位套包含一體成形之一固定座與一校準套，螺釘螺設於固定座且凸伸於固定座外，於固定座具有內螺紋，校準套供手術時校準之用。將螺釘連同定位套螺入脊椎，置入脊椎連桿，再於固定座內螺合一鎖固螺絲以迫緊脊椎連桿，而後利用工具將校準套折斷並移除。Regarding the structure of the conventional open-type long wing-shaped bone nail, it mainly consists of a positioning sleeve and a screw. The positioning sleeve includes an integrally formed fixing base and a calibration sleeve. The screw is set on the fixing base and protrudes outside the fixing base. The fixing base has internal threads. The calibration sleeve is used for calibration during surgery. Screw the screw together with the positioning sleeve into the spine, insert the spinal connecting rod, screw a locking screw into the fixed base to tighten the spinal connecting rod, and then use a tool to break off the calibration sleeve and remove it.

此外，另可見一種套筒式長翼型骨釘，其主要由一螺釘頭部、一螺釘與一可套設於螺釘頭部外之長筒狀擴張器構成。螺釘螺設於螺釘頭部且凸伸於螺釘頭部外，其形態類似於短翼釘，螺釘頭部與擴張器皆具有內螺紋，擴張器供手術時校準之用。將螺釘連同定位套螺入脊椎，置入脊椎連桿，再將一具有外螺紋之桿狀工具及鎖固螺絲螺入擴張器內，將鎖固螺絲迫緊脊椎連桿，而後將擴張器移除。In addition, there is also a sleeve-type long wing-shaped bone nail, which mainly consists of a screw head, a screw and a long cylindrical expander that can be sleeved outside the screw head. The screw screw is located on the screw head and protrudes outside the screw head. Its shape is similar to a short wing screw. Both the screw head and the dilator have internal threads. The dilator is used for calibration during surgery. Screw the screw together with the positioning sleeve into the spine, insert the spinal connecting rod, then screw a rod-shaped tool with external threads and the locking screw into the dilator, tighten the locking screw on the spinal connecting rod, and then move the dilator remove.

惟，無論上述習知開口式長翼型骨釘或習知套筒式長翼型骨釘，皆存在一主要的缺失，亦即，無法確實得知鎖固起子是否將鎖固螺絲鎖緊，只能憑藉操作者的經驗與感覺，因此常導致兩種情況，未確實將鎖固螺絲鎖緊而無法迫緊脊椎連桿，或者，過度鎖緊而導致鎖固螺絲滑牙，因而必須更換鎖固螺絲或固定座。However, no matter the above-mentioned conventional open-type long wing-shaped bone screws or the conventional sleeve-type long wing-shaped bone screws, there is one major shortcoming, that is, it is impossible to know whether the locking screw is locked by the locking screwdriver. It can only rely on the operator's experience and feeling, which often leads to two situations: the locking screw is not firmly tightened and the spinal connecting rod cannot be tightened, or the locking screw is over-locked and causes the locking screw to slip, so the lock must be replaced. Fasten screws or mounts.

據此，如何發展出一種結構簡單、操作方便、可確實將鎖固螺絲適當地迫緊脊椎連桿且不致對患者的手術開口造成傷害的「鎖固起子與鎖固螺絲之連接結構」，是相關技術領域人士亟待解決之課題。Based on this, how to develop a "connection structure between the locking screwdriver and the locking screw" that is simple in structure, easy to operate, can reliably tighten the locking screw to the spinal connecting rod appropriately without causing damage to the patient's surgical opening, is Issues that people in relevant technical fields urgently need to solve.

於一實施例中，本發明提出一種鎖固起子與鎖固螺絲之連接結構，適合用於鎖固骨釘之連接桿，其包含：一鎖固起子，沿其軸向具有相對之一第一軸向端部與一第二軸向端部，鎖固起子之第一軸向端部之外側壁具有複數肋條，各肋條之長度方向平行於一第一方向，於鎖固起子之第一軸向端部具有一第一卡合段，第一卡合段平行於第一方向凸伸於複數肋條外，第一卡合段與複數肋條相鄰之一端具有一第一外徑，第一卡合段遠離複數肋條之另一端具有一第二外徑，第二外徑小於第一外徑；以及一鎖固螺絲，呈環狀，其具有相對之一第三軸向端部與一第四軸向端，鎖固螺絲之中心平行於第一方向具有一貫穿部，於鎖固螺絲之內側壁設有複數凹槽，各凹槽之長度方向平行於第一方向，於鎖固螺絲之外側壁具有第二外螺紋，於貫穿部內靠近鎖固螺絲之第三軸向端部具有一第二卡合段，第二卡合段具有一第一內徑，第一內徑小於第一外徑且大於第二外徑；其中，鎖固起子之第一軸向端部平行於第一方向***鎖固螺絲之貫穿部中，各肋條卡合於各凹槽間，第一卡合段穿設且卡合於第二卡合段，且第一卡合段凸伸於第三軸向端部外一長度，使鎖固起子與鎖固螺絲形成連接狀態，將連接有鎖固螺絲之鎖固起子置入骨釘，驅動鎖固起子旋轉帶動鎖固螺絲螺合於骨釘內，將連接桿夾合於鎖固螺絲與骨釘之間。 In one embodiment, the present invention proposes a connection structure between a locking screwdriver and a locking screw, suitable for use as a connecting rod for locking bone screws, which includes: A locking screwdriver has an opposite first axial end and a second axial end along its axial direction. The outer side wall of the first axial end of the locking screwdriver has a plurality of ribs, and the length direction of each rib Parallel to a first direction, there is a first engaging section at the first axial end of the locking screwdriver. The first engaging section protrudes outside the plurality of ribs parallel to the first direction. The first engaging section is connected to the plurality of ribs. One adjacent end of the rib has a first outer diameter, and the other end of the first engaging section away from the plurality of ribs has a second outer diameter, and the second outer diameter is smaller than the first outer diameter; and A locking screw is ring-shaped and has an opposite third axial end and a fourth axial end. The center of the locking screw is parallel to the first direction and has a through portion on the inner wall of the locking screw. A plurality of grooves are provided, the length direction of each groove is parallel to the first direction, a second external thread is provided on the side wall outside the locking screw, and a second hook is provided in the through portion close to the third axial end of the locking screw. The second engaging section has a first inner diameter, the first inner diameter is smaller than the first outer diameter and greater than the second outer diameter; Wherein, the first axial end of the locking screwdriver is inserted into the penetration part of the locking screw parallel to the first direction, each rib is engaged between each groove, and the first engaging section is inserted through and engaged with the second engaging section. The first engaging section protrudes beyond the third axial end by a length so that the locking screwdriver and the locking screw are connected. Place the locking screwdriver connected to the locking screw into the bone nail and drive it. The rotation of the locking screwdriver drives the locking screw to be screwed into the bone nail, and the connecting rod is clamped between the locking screw and the bone nail.

請參閱圖1至圖4所示，本發明所提供之一種鎖固起子與鎖固螺絲之連接結構，其包含一鎖固起子60與一鎖固螺絲50。Referring to FIGS. 1 to 4 , the present invention provides a connection structure between a locking screwdriver and a locking screw, which includes a locking screwdriver 60 and a locking screw 50 .

鎖固起子60沿其軸向具有相對之一第一軸向端部61與一第二軸向端部62。鎖固起子60之第一軸向端部61之外側壁具有複數肋條63。各肋條63之長度方向平行於一第一方向F1。The locking driver 60 has an opposite first axial end 61 and a second axial end 62 along its axial direction. The outer side wall of the first axial end 61 of the locking driver 60 has a plurality of ribs 63 . The length direction of each rib 63 is parallel to a first direction F1.

於鎖固起子60之第一軸向端部61具有一呈圓軸狀之第一卡合段64。第一卡合段64平行於第一方向F1凸伸於複數肋條63。第一卡合段64與複數肋條63相鄰之一端具有一第一外徑D1，第一卡合段64遠離複數肋條63之另一端具有一第二外徑D2，第二外徑D2小於第一外徑D1。The first axial end 61 of the locking screwdriver 60 has a first engaging section 64 in the shape of a circular shaft. The first engaging section 64 protrudes from the plurality of ribs 63 parallel to the first direction F1. One end of the first engaging section 64 adjacent to the plurality of ribs 63 has a first outer diameter D1, and the other end of the first engaging section 64 away from the plurality of ribs 63 has a second outer diameter D2. The second outer diameter D2 is smaller than the first outer diameter D2. An outer diameter D1.

鎖固螺絲50呈環狀，其具有相對之一第三軸向端部53與一第四軸向端54。鎖固螺絲50之中心平行於第一方向F1具有一貫穿部55。The locking screw 50 is annular and has a third axial end 53 and a fourth axial end 54 opposite to each other. The center of the locking screw 50 is parallel to the first direction F1 and has a through portion 55 .

於鎖固螺絲50之內側壁設有複數凹槽51，各凹槽51之長度方向平行於第一方向F1。於鎖固螺絲50之外側壁具有第二外螺紋52。A plurality of grooves 51 are provided on the inner wall of the locking screw 50, and the length direction of each groove 51 is parallel to the first direction F1. There is a second external thread 52 on the outer side wall of the locking screw 50 .

於貫穿部55內靠近鎖固螺絲50之第三軸向端部53具有一呈圓孔狀之第二卡合段56。第二卡合段56具有一第一內徑D3，第一內徑D3小於第一外徑D1且大於第二外徑D2。There is a second engaging section 56 in the shape of a round hole in the through portion 55 close to the third axial end 53 of the locking screw 50 . The second engaging section 56 has a first inner diameter D3, which is smaller than the first outer diameter D1 and larger than the second outer diameter D2.

鎖固起子60平行於第一方向F1***鎖固螺絲50之貫穿部55中，第一軸向端部61凸伸於第三軸向端部53外。各肋條63卡合於各凹槽51間，且由於第一內徑D3小於第一外徑D1且大於第二外徑D2的配合關係，因此第一卡合段64可穿設且卡合於第二卡合段56，且第一卡合段64凸伸於第三軸向端部53外一長度L，使鎖固起子60與鎖固螺絲50形成連接狀態。長度L的尺寸例如介於0.2~0.5毫米之範圍。The locking driver 60 is inserted into the through portion 55 of the locking screw 50 parallel to the first direction F1, and the first axial end portion 61 protrudes outside the third axial end portion 53. Each rib 63 is engaged between each groove 51, and since the first inner diameter D3 is smaller than the first outer diameter D1 and greater than the second outer diameter D2, the first engaging section 64 can be inserted through and engaged in The second engaging section 56 and the first engaging section 64 protrude beyond the third axial end 53 by a length L, so that the locking driver 60 and the locking screw 50 are connected. The size of the length L is, for example, in the range of 0.2~0.5 mm.

換言之，本發明所提供的鎖固起子60除了可用以螺動鎖固螺絲50之外，由於鎖固起子60與鎖固螺絲50之間具有特殊的第一卡合段64與第二卡合段56設計，因此可使鎖固起子60對鎖固螺絲50發揮抓持的功能，將鎖固起子60平行於第一方向F1***鎖固螺絲50之貫穿部55之後，可藉由鎖固起子60將鎖固螺絲50移動至所需位置，無需另外設置抓持鎖固螺絲50的工具。In other words, the locking screwdriver 60 provided by the present invention can not only be used to screw the locking screw 50, but also has a special first engaging section 64 and a second engaging section between the locking screwdriver 60 and the locking screw 50. 56 design, so the locking screwdriver 60 can play a grabbing function on the locking screw 50. After the locking screwdriver 60 is inserted into the through portion 55 of the locking screw 50 parallel to the first direction F1, the locking screwdriver 60 can be used to grasp the locking screw 50. Move the locking screw 50 to the desired position, and there is no need to set up another tool for grabbing the locking screw 50 .

請參閱圖5至圖7所示，本發明所提供之一種鎖固起子與鎖固螺絲之連接結構，適合用於鎖固骨釘之連接桿40。Referring to FIGS. 5 to 7 , the invention provides a connection structure between a locking driver and a locking screw, which is suitable for use in connecting rods 40 of locking bone screws.

圖5顯示之骨釘包含一支撐件10、一螺釘20、一延伸套管30及一連接桿40。The bone nail shown in Figure 5 includes a support member 10, a screw 20, an extension sleeve 30 and a connecting rod 40.

連接桿40的長度依實際使用需要而定，圖1僅示意顯示部分長度。通常，連接桿40之長度應足夠搭接兩相鄰之骨釘套件100。The length of the connecting rod 40 depends on actual usage needs, and FIG. 1 only schematically shows part of the length. Generally, the length of the connecting rod 40 should be enough to overlap two adjacent bone nail sets 100 .

支撐件10由一底部11與二翼片12構成。各翼片12之內側壁設有第一內螺紋14。各翼片12平行於第一方向F1具有一固定片121與一折斷片122，固定片121與底部11連接，折斷片122與固定片121之連接處形成一溝槽123。第一內螺紋14之範圍涵蓋固定片121之內側壁與折斷片122之內側壁。底部11與二翼片12之間形成一凹部16。The support member 10 is composed of a bottom 11 and two wings 12 . A first internal thread 14 is provided on the inner wall of each wing 12 . Each flap 12 has a fixed piece 121 and a broken piece 122 parallel to the first direction F1. The fixed piece 121 is connected to the bottom 11, and a groove 123 is formed at the connection between the broken piece 122 and the fixed piece 121. The range of the first internal thread 14 covers the inner wall of the fixing piece 121 and the inner wall of the breaking piece 122 . A recess 16 is formed between the bottom 11 and the two wings 12 .

螺釘20具有一螺紋部21。螺釘20樞設於底部11。螺紋部21可於支撐件10之底部11外擺動。The screw 20 has a threaded portion 21 . The screw 20 is pivoted on the bottom 11 . The threaded portion 21 can swing outside the bottom 11 of the support member 10 .

關於螺釘20與支撐件10之結合方式屬於本發明技術領域人士慣用技術，因此不予贅述。The method of combining the screw 20 and the support member 10 is a common technique used by those skilled in the art of the present invention, and therefore will not be described in detail.

延伸套管30由一連接片31與二延伸翼片32構成。二延伸翼片32平行於第一方向F1設置於連接片31之兩側。各延伸翼片32之外側壁設有第一外螺紋34。The extension sleeve 30 is composed of a connecting piece 31 and two extending fins 32 . The two extending fins 32 are arranged on both sides of the connecting piece 31 parallel to the first direction F1. A first external thread 34 is provided on the outer side wall of each extending fin 32 .

延伸套管30之連接片31與二延伸翼片32具有相同之弧度，使延伸套管30形成一圓筒狀結構。延伸翼片32之外側壁之第一外螺紋34設置於延伸翼片32靠近連接片31之一端。The connecting piece 31 of the extension sleeve 30 and the two extension wings 32 have the same curvature, so that the extension sleeve 30 forms a cylindrical structure. The first external thread 34 on the outer side wall of the extension fin 32 is provided at an end of the extension fin 32 close to the connecting piece 31 .

延伸套管30平行於第一方向F1套設於支撐件10之二翼片12外。於將延伸套管30套設於支撐件10之前，可將連接桿40以其軸向垂直於第一方向F1之方式設置於二翼片12之間。The extension sleeve 30 is sleeved outside the two wings 12 of the support member 10 parallel to the first direction F1. Before the extension sleeve 30 is sleeved on the support member 10 , the connecting rod 40 can be disposed between the two wings 12 with its axial direction perpendicular to the first direction F1 .

而後，將已相互連接之鎖固起子60與鎖固螺絲50置入延伸套管30。如前所述，本發明所提供的鎖固起子60不僅可螺動鎖固螺絲50，也能對鎖固螺絲50發揮抓持的功能，可藉由鎖固起子60將鎖固螺絲50移動至所需位置，無需另外設置抓持鎖固螺絲50的工具。Then, the connected locking driver 60 and the locking screw 50 are inserted into the extension sleeve 30 . As mentioned above, the locking screwdriver 60 provided by the present invention can not only screw the locking screw 50 , but also can hold the locking screw 50 . The locking screw 50 can be moved by the locking screwdriver 60 . The required position eliminates the need to provide additional tools for grasping the locking screw 50 .

而後，驅動鎖固起子60旋轉帶動鎖固螺絲50轉動，使第二外螺紋52與第一內螺紋14相螺合，將連接桿40夾合於鎖固螺絲50與骨釘之底部11之間。Then, the locking screwdriver 60 is driven to rotate to drive the locking screw 50 to rotate, so that the second external thread 52 is screwed with the first internal thread 14, and the connecting rod 40 is clamped between the locking screw 50 and the bottom 11 of the bone nail. .

請參閱圖7所示，說明本發明所提供之鎖固起子與鎖固螺絲之連接結構之工作原理。當轉動鎖固起子60使第二外螺紋52與第一內螺紋14相螺合時，可將鎖固螺絲50平行於第一方向F1向下螺入。當鎖固螺絲50持續向下移動至使第一軸向端部61接觸連接桿40並將連接桿40迫緊於第一軸向端部61與凹部16間時，若持續轉動鎖固起子60，可使鎖固螺絲50持續向下螺入，但由於第一軸向端部61被連接桿40擋住無法再向下活動，因此會被反推向上，如此即可使第一卡合段64脫離第二卡合段56 。Please refer to FIG. 7 to illustrate the working principle of the connection structure between the locking driver and the locking screw provided by the present invention. When the locking screwdriver 60 is rotated to screw together the second external thread 52 and the first internal thread 14 , the locking screw 50 can be screwed downward parallel to the first direction F1 . When the locking screw 50 continues to move downward until the first axial end 61 contacts the connecting rod 40 and the connecting rod 40 is pressed between the first axial end 61 and the recess 16 , if the locking screw 60 continues to rotate , the locking screw 50 can continue to be screwed downward, but because the first axial end 61 is blocked by the connecting rod 40 and cannot move downward, it will be pushed upward, so that the first engaging section 64 Disengage from the second engaging section 56 .

此外，當鎖固螺絲50被鎖固起子60帶動至迫緊於連接桿40之後，由於鎖固起子60會被連接桿40推離，因此可確保鎖固螺絲50確實迫緊於連接桿40，不致發生未確實將鎖固螺絲50鎖緊而無法迫緊連接桿40，或者，因鎖固起子60過度鎖緊而導致鎖固螺絲50滑牙的情況發生。In addition, when the locking screw 50 is driven by the locking screwdriver 60 to be tight against the connecting rod 40, since the locking screwdriver 60 will be pushed away by the connecting rod 40, it can be ensured that the locking screw 50 is indeed tightened against the connecting rod 40. This avoids the situation where the locking screw 50 is not firmly tightened and the connecting rod 40 cannot be tightened, or the locking screw 50 slips due to excessive tightening of the locking screwdriver 60 .

請參閱圖8所示，說明如何利用延伸套管脫出器70將延伸套管30取出以及鎖固起子60所提供的其他功能。Please refer to FIG. 8 for an explanation of how to use the extension sleeve extractor 70 to take out the extension sleeve 30 and other functions provided by the locking driver 60 .

延伸套管脫出器70由一套筒71與一把手72構成。把手72呈圓桿狀，把手72之軸向與套筒71之軸向相互垂直。The extension sleeve extractor 70 is composed of a sleeve 71 and a handle 72 . The handle 72 is in the shape of a round rod, and the axial direction of the handle 72 and the axial direction of the sleeve 71 are perpendicular to each other.

套筒71之兩軸向端分別具有一透空部711與一內凹部712。把手72設置於套筒71具有內凹部712之軸向端。套筒71之內側壁具有第二內螺紋713。將套筒71套設於延伸套管30外，旋轉把手72(亦即旋轉套筒71)，可使第二內螺紋713與第一外螺紋34相螺合。Two axial ends of the sleeve 71 have a hollow portion 711 and an inner recessed portion 712 respectively. The handle 72 is provided at an axial end of the sleeve 71 with an inner recess 712 . The inner wall of the sleeve 71 has a second internal thread 713 . The sleeve 71 is placed outside the extension sleeve 30 and the handle 72 is rotated (that is, the sleeve 71 is rotated), so that the second internal thread 713 and the first external thread 34 can be screwed together.

請參閱圖9至圖12所示，將延伸套管脫出器70套設於延伸套管30外，旋轉把手72(亦即旋轉套筒71)，使第二內螺紋713與第一外螺紋34的螺合，延伸套管脫出器70平行於第一方向F1下移，可使鎖固起子60之第二軸向端部62抵制於內凹部712。Referring to Figures 9 to 12, the extension sleeve extractor 70 is placed outside the extension sleeve 30, and the handle 72 (that is, the rotation sleeve 71) is rotated so that the second internal thread 713 is connected with the first external thread. 34, the extension sleeve extractor 70 moves downward parallel to the first direction F1, so that the second axial end 62 of the locking driver 60 resists the inner recess 712.

此時，持續旋轉把手72(亦即旋轉套筒71)，由於延伸套管脫出器70被鎖固起子60抵制無法繼續下降，而延伸套管30與支撐件10之間則是以鳩尾槽33與鳩尾座15沿第一方向F1相互可分離地卡合，因此可藉由第二內螺紋713與第一外螺紋34持續咬合，由延伸套管脫出器70將延伸套管30平行於第一方向F1向上拉，最終可使延伸套管30與支撐件10之二翼片12脫離，如圖12所示。At this time, continue to rotate the handle 72 (that is, rotate the sleeve 71), because the extension sleeve extractor 70 is resisted by the locking screwdriver 60 and cannot continue to descend, and there is a dovetail groove between the extension sleeve 30 and the support member 10. 33 and the dovetail seat 15 are detachably engaged with each other along the first direction F1. Therefore, the second internal thread 713 and the first external thread 34 can be continuously engaged, and the extension sleeve 30 can be parallel to the extension sleeve ejector 70. By pulling upward in the first direction F1, the extension sleeve 30 can finally be separated from the two wings 12 of the support member 10, as shown in Figure 12.

必須說明的是，鳩尾座15與鳩尾槽33僅作為本案延伸翼片32內側壁與翼片12外側壁相互卡合之一種卡合結構實施例。於圖12顯示將鳩尾座15設置於翼片12外側壁，將鳩尾槽33設置於延伸翼片32內側壁，除此之外，可將鳩尾槽33與鳩尾座15對調，亦即，將鳩尾槽33設置於翼片12外側壁，將鳩尾座15設置於延伸翼片32內側壁，亦可達成相同的卡合功效。更進一步地，延伸翼片32內側壁與翼片12外側壁之間設置相對應的凹凸卡合結構即可，例如，一為凹槽、一為凸條，或者，一為凹洞、一為凸點；且數量不限一組。It must be noted that the dovetail seat 15 and the dovetail groove 33 are only an embodiment of the engagement structure in which the inner wall of the extension fin 32 and the outer wall of the fin 12 engage with each other. Figure 12 shows that the dovetail seat 15 is provided on the outer wall of the fin 12, and the dovetail groove 33 is provided on the inner wall of the extended fin 32. In addition, the dovetail groove 33 and the dovetail seat 15 can be reversed, that is, the dovetail groove 33 can be exchanged with the dovetail seat 15. The groove 33 is provided on the outer wall of the fin 12, and the dovetail seat 15 is provided on the inner wall of the extended fin 32 to achieve the same engagement effect. Furthermore, it suffices to provide corresponding concave and convex engaging structures between the inner wall of the extension fin 32 and the outer wall of the fin 12 , for example, one is a groove and the other is a convex strip, or one is a concave hole and the other is a convex strip. Bumps; and the number is not limited to one set.

而後即可進行後續的手術步驟，包括，將鎖固起子60取出、將翼片12的折斷片122於溝槽123處折斷，等等。Then, subsequent surgical steps can be performed, including taking out the locking screwdriver 60, breaking the break piece 122 of the wing 12 at the groove 123, and so on.

綜上所述，本發明所提供之鎖固起子與鎖固螺絲之連接結構，適合用於鎖固骨釘之連接桿，本發明所提供的鎖固起子除了可用以螺動鎖固螺絲之外，由於鎖固起子與鎖固螺絲之間具有特殊的第一卡合段與第二卡合段設計，當鎖固螺絲被鎖固起子帶動至迫緊於連接桿之後，由於鎖固起子會被連接桿推離，因此可確保鎖固螺絲確實迫緊於連接桿，不致發生未確實將鎖固螺絲鎖緊而無法迫緊連接桿，或者，因鎖固起子過度鎖緊而導致鎖固螺絲滑牙的情況發生。此外，由於鎖固起子與鎖固螺絲之間具有特殊的第一卡合段與第二卡合段設計，因此可使鎖固起子對鎖固螺絲發揮抓持功能，可藉由鎖固起子將鎖固螺絲移動至所需位置，無需另外設置抓持鎖固螺絲的工具。In summary, the connection structure between the locking screwdriver and the locking screw provided by the present invention is suitable for use as a connecting rod for locking bone screws. The locking screwdriver provided by the present invention can be used in addition to screwing the locking screw. , due to the special first and second engagement section designs between the locking screwdriver and the locking screw, when the locking screw is driven by the locking screwdriver to be tight against the connecting rod, the locking screwdriver will be The connecting rod is pushed away, thus ensuring that the locking screw is indeed tightened on the connecting rod. This avoids the possibility that the locking screw is not firmly tightened and the connecting rod cannot be tightened, or that the locking screw slips due to excessive tightening of the locking screwdriver. tooth condition occurs. In addition, due to the special first and second engagement section designs between the locking screwdriver and the locking screw, the locking screwdriver can exert a gripping function on the locking screw, and the locking screwdriver can be used to hold the locking screw. The locking screw moves to the desired position without the need for additional tools to hold the locking screw.

雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the appended patent application scope.

10:支撐件 11:底部 12:二翼片 121:固定片 122:折斷片 123:溝槽 13:孔洞 14:第一內螺紋 15:鳩尾座 16:凹部 20:螺釘 21:螺紋部 30:延伸套管 31:連接片 32:延伸翼片 33:鳩尾槽 34:第一外螺紋 40:連接桿 50:鎖固螺絲 51:凹槽 52:第二外螺紋 53:第三軸向端部 54:第四軸向端 55:貫穿部 56:第二卡合段 60:鎖固起子 61:第一軸向端部 62:第二軸向端部 63:肋條 64:第一卡合段 70:延伸套管脫出器 71:套筒 711:透空部 712:內凹部 713:第二內螺紋 72:把手 D1:第一外徑 D2:第二外徑 D3:第一內徑 F1:第一方向 L:長度 10:Support 11: Bottom 12: Two wing pieces 121: Fixed piece 122: broken piece 123:Trench 13:hole 14: First internal thread 15: Dovetail 16: concave part 20:Screw 21:Thread part 30:Extension sleeve 31: Connecting piece 32:Extended wings 33:Dove tail groove 34: First external thread 40:Connecting rod 50: Locking screw 51: Groove 52: Second external thread 53:Third axial end 54:Fourth axial end 55:Penetration Department 56: The second engagement section 60: Locking screwdriver 61: First axial end 62: Second axial end 63:ribs 64: The first engagement section 70:Extended casing extractor 71:Sleeve 711: Hollow part 712: Inner concave part 713: Second internal thread 72: handle D1: first outer diameter D2: second outer diameter D3: first inner diameter F1: first direction L: length

圖1為本發明之一實施例之組合立體結構示意圖。圖2為本發明之鎖固螺絲與部分鎖固起子之放大分解結構示意圖。圖3為本發明之鎖固螺絲與部分鎖固起子之軸向剖面放大分解結構示意圖。圖4為本發明之鎖固螺絲與部分鎖固起子之軸向剖面放大組合結構示意圖。圖5為本發明之支撐件、螺釘、延伸套管相互搭配之組合結構示意圖。圖6為本發明之鎖固螺絲與鎖固起子置入延伸套管與支撐件中之結構示意圖。圖7為本發明之鎖固螺絲與鎖固起子置入延伸套管與支撐件中且第一軸向端部頂抵於連接桿之軸向剖面放大組合結構示意圖。圖8為本發明之延伸套管脫出器與延伸套管相互套合之結構示意圖。圖9為本發明旋轉延伸套管脫出器之結構示意圖。圖10為本發明之延伸套管脫出器、鎖固起子、延伸套管之組合結構部分剖視結構示意圖。圖11A為圖10之A部大結構示意圖。圖11B為圖10之B部大結構示意圖。圖12為本發明之延伸套管脫出器將延伸套管與支撐件分離之結構示意圖。 Figure 1 is a schematic diagram of the assembled three-dimensional structure of one embodiment of the present invention. Figure 2 is an enlarged and exploded structural diagram of the locking screw and part of the locking driver of the present invention. Figure 3 is an enlarged and exploded schematic diagram of the axial cross-section of the locking screw and part of the locking driver of the present invention. Figure 4 is an enlarged axial cross-sectional structural diagram of the locking screw and part of the locking driver of the present invention. Figure 5 is a schematic diagram of the combined structure of the support, screws, and extension sleeves of the present invention. Figure 6 is a schematic structural diagram of the locking screw and locking driver of the present invention being inserted into the extension sleeve and the support member. 7 is a schematic diagram of an enlarged axial cross-sectional assembly structure of the locking screw and locking driver of the present invention, which are inserted into the extension sleeve and the support member, and the first axial end is pressed against the connecting rod. Figure 8 is a schematic structural diagram of the extension sleeve extractor and the extension sleeve of the present invention being fitted into each other. Figure 9 is a schematic structural diagram of the rotary extension casing extractor of the present invention. Figure 10 is a partial cross-sectional structural schematic diagram of the combined structure of the extension sleeve extractor, locking driver, and extension sleeve according to the present invention. FIG. 11A is a schematic diagram of the large structure of part A in FIG. 10 . FIG. 11B is a schematic diagram of the large structure of part B in FIG. 10 . Figure 12 is a schematic structural diagram of the extension sleeve extractor of the present invention separating the extension sleeve and the support member.

50:鎖固螺絲 50: Locking screw

51:凹槽 51: Groove

52:第二外螺紋 52: Second external thread

53:第三軸向端部 53:Third axial end

54:第四軸向端 54:Fourth axial end

55:貫穿部 55:Penetration Department

56:第二卡合段 56: The second engagement section

60:鎖固起子 60: Locking screwdriver

61:第一軸向端部 61: First axial end

63:肋條 63:ribs

64:第一卡合段 64: The first engagement section

D1:第一外徑 D1: first outer diameter

D2:第二外徑 D2: second outer diameter

D3:第一內徑 D3: first inner diameter

F1:第一方向 F1: first direction

Claims

一種鎖固起子與鎖固螺絲之連接結構，適合用於鎖固骨釘之連接桿，其包含：一鎖固起子，沿其軸向具有相對之一第一軸向端部與一第二軸向端部，該鎖固起子之該第一軸向端部之外側壁具有複數肋條，各該肋條之長度方向平行於一第一方向，於該鎖固起子之該第一軸向端部具有一第一卡合段，該第一卡合段平行於該第一方向凸伸於該複數肋條外，該第一卡合段與該複數肋條相鄰之一端具有一第一外徑，該第一卡合段遠離該複數肋條之另一端具有一第二外徑，該第二外徑小於該第一外徑；以及一鎖固螺絲，呈環狀，其具有相對之一第三軸向端部與一第四軸向端，該鎖固螺絲之中心平行於該第一方向具有一貫穿部，於該鎖固螺絲之內側壁設有複數凹槽，各該凹槽之長度方向平行於該第一方向，於該鎖固螺絲之外側壁具有第二外螺紋，於該貫穿部內靠近該鎖固螺絲之該第三軸向端部具有一第二卡合段，該第二卡合段具有一第一內徑，該第一內徑小於該第一外徑且大於該第二外徑；其中，該鎖固起子之該第一軸向端部平行於該第一方向***該鎖固螺絲之該貫穿部中，各該肋條卡合於各該凹槽間，該第一卡合段穿設且卡合於該第二卡合段，且該第一卡合段凸伸於該第三軸向端部外一長度，使該鎖固起子與該鎖固螺絲形成連接狀態，將連接有該鎖固螺絲之該鎖固起子置入該骨釘，驅動該鎖固起子旋轉帶動該鎖固螺絲螺合於該骨釘內，將連接桿夾合於該鎖固螺絲與該骨釘之間。 A connecting structure between a locking driver and a locking screw, suitable for connecting rods for locking bone screws, and includes: A locking screwdriver has an opposite first axial end and a second axial end along its axial direction, and the outer side wall of the first axial end of the locking screwdriver has a plurality of ribs, each of the ribs The length direction is parallel to a first direction, and a first engaging section is provided at the first axial end of the locking screwdriver, and the first engaging section protrudes outside the plurality of ribs parallel to the first direction. , one end of the first engaging section adjacent to the plurality of ribs has a first outer diameter, and the other end of the first engaging section away from the plurality of ribs has a second outer diameter, and the second outer diameter is smaller than the first outer diameter. an outer diameter; and A locking screw is annular and has an opposite third axial end and a fourth axial end. The center of the locking screw has a through portion parallel to the first direction. The center of the locking screw is parallel to the first direction. The inner side wall is provided with a plurality of grooves, the length direction of each groove is parallel to the first direction, the side wall outside the locking screw has a second external thread, and the third thread is close to the locking screw in the through portion. The axial end has a second engaging section, the second engaging section has a first inner diameter, the first inner diameter is smaller than the first outer diameter and greater than the second outer diameter; Wherein, the first axial end of the locking screwdriver is inserted into the through portion of the locking screw parallel to the first direction, each rib is engaged between each groove, and the first engaging section passes through It is arranged and engaged with the second engaging section, and the first engaging section protrudes a length outside the third axial end, so that the locking screwdriver and the locking screw are connected, and the connected The locking screwdriver of the locking screw is inserted into the bone nail, the locking screwdriver is driven to rotate and the locking screw is screwed into the bone nail, and the connecting rod is clamped between the locking screw and the bone nail. .

如請求項1之鎖固起子與鎖固螺絲之連接結構，其中該第一卡合段凸伸於該第三軸向端部外之該長度介於0.2~0.5毫米之範圍。For example, the connecting structure of a locking screwdriver and a locking screw according to claim 1, wherein the length of the first engaging section protruding outside the third axial end is in the range of 0.2~0.5 mm.

如請求項1之鎖固起子與鎖固螺絲之連接結構，其中該骨釘包括：一支撐件，由一底部與二翼片構成，該底部具有一孔洞，該二翼片平行於該第一方向突伸於該底部之頂面之兩側，各該翼片之內側壁設有第一內螺紋，該底部與該二翼片之間形成一凹部；一螺釘，具有一螺紋部，該螺釘樞設於該底部，該螺紋部由該孔洞穿出並突伸於該底部之底面，該螺紋部可於該支撐件之該底部外擺動；一延伸套管，由一連接片與二延伸翼片構成，該二延伸翼片平行於該第一方向設置於該連接片之兩側，各該延伸翼片之外側壁設有第一外螺紋，各該延伸翼片之內側壁與各該翼片的外側壁之間設有可相互卡合之卡合結構，該延伸套管平行於該第一方向套設於該支撐件之該二翼片外，各該延伸翼片之內側壁與各該翼片的外側壁相對應之該卡合結構相卡合；一連接桿，其軸向垂直於該第一方向設置於該二翼片之間；該鎖固螺絲設置於該凹部；該鎖固起子之該軸向平行於該第一方向置入該凹部，該第一軸向端部與該鎖固螺絲連接，驅動該鎖固起子旋轉帶動該鎖固螺絲轉動，使該第二外螺紋與該第一內螺紋相螺合，將該連接桿夾合於該鎖固螺絲與該底部之間。 For example, the connecting structure of a locking driver and a locking screw according to claim 1, wherein the bone screw includes: A support member is composed of a bottom and two wings. The bottom has a hole. The two wings protrude from both sides of the top surface of the bottom parallel to the first direction. The inner wall of each wing is provided with a hole. A first internal thread, a recess is formed between the bottom and the two fins; A screw has a threaded portion, the screw is pivoted on the bottom, the threaded portion passes through the hole and protrudes from the bottom surface of the bottom, and the threaded portion can swing outside the bottom of the support member; An extension sleeve is composed of a connecting piece and two extending fins. The two extending fins are arranged on both sides of the connecting piece parallel to the first direction. The outer side wall of each extending fin is provided with a first external thread. , an engaging structure that can engage with each other is provided between the inner wall of each extended wing and the outer wall of each extended wing, and the extended sleeve is sleeved on the two wings of the support member parallel to the first direction. Outside the piece, the inner wall of each extended fin is engaged with the corresponding engaging structure on the outer side wall of each fin; A connecting rod, the axial direction of which is perpendicular to the first direction, is provided between the two fins; The locking screw is disposed in the recess; the axial direction of the locking screwdriver is inserted into the recess parallel to the first direction, and the first axial end is connected to the locking screw to drive the locking screwdriver to rotate. The locking screw rotates to screw together the second external thread and the first internal thread, and clamp the connecting rod between the locking screw and the bottom.

如請求項3之鎖固起子與鎖固螺絲之連接結構，其中各該翼片平行於該第一方向具有一固定片與一折斷片，該固定片與該底部連接，該折斷片與該固定片之連接處形成一溝槽。The connecting structure of a locking screwdriver and a locking screw according to claim 3, wherein each of the wings has a fixing piece and a breaking piece parallel to the first direction, the fixing piece is connected to the bottom, and the breaking piece is connected to the fixing piece. The connection between the pieces forms a groove.

如請求項4之鎖固起子與鎖固螺絲之連接結構，其中該第一內螺紋之範圍涵蓋該固定片之內側壁與該折斷片之內側壁。For example, in claim 4, the connection structure between a locking driver and a locking screw is provided, wherein the range of the first internal thread covers the inner wall of the fixed piece and the inner wall of the breaking piece.

如請求項3之鎖固起子與鎖固螺絲之連接結構，其中該延伸套管之該連接片與該二延伸翼片具有相同之弧度，該延伸套管形成一圓筒狀結構。For example, in claim 3, the connection structure between a locking driver and a locking screw is provided, wherein the connecting piece of the extension sleeve and the two extension wings have the same curvature, and the extension sleeve forms a cylindrical structure.

如請求項3之鎖固起子與鎖固螺絲之連接結構，其中各該延伸翼片之該外側壁之該第一外螺紋設置於各該延伸翼片靠近該連接片之一端。The connecting structure of a locking screwdriver and a locking screw according to claim 3, wherein the first external thread of the outer wall of each extension fin is provided at an end of each extension fin close to the connecting piece.

如請求項3之鎖固起子與鎖固螺絲之連接結構，其中該延伸套管外套設有一延伸套管脫出器，其包含一套筒，該套筒之兩軸向端分別具有一透空部與一內凹部，該套筒之內側壁具有第二內螺紋，該套筒套設於該延伸套管外，該第二內螺紋與該第一外螺紋相螺合，持續旋轉該套筒可使該鎖固起子之該第二軸向端部抵制於該內凹部，並使該延伸套管與該支撐件脫離。For example, the connecting structure of a locking driver and a locking screw according to claim 3, wherein the extension sleeve casing is provided with an extension sleeve extractor, which includes a sleeve, and the two axial ends of the sleeve respectively have a hollow and an inner recess. The inner wall of the sleeve has a second internal thread. The sleeve is sleeved outside the extended sleeve. The second internal thread is threaded with the first external thread, and the sleeve continues to rotate. The second axial end of the locking screwdriver can be made to resist the inner recess, and the extension sleeve can be separated from the support member.

如請求項8之鎖固起子與鎖固螺絲之連接結構，其中該延伸套管脫出器包括一把手，該把手設置於該套筒具有該內凹部之該軸向端，持續旋轉該把手可使該鎖固起子之該第二軸向端部抵制於該內凹部，並使該延伸套管與該支撐件之該二翼片脫離。The connecting structure of a locking screwdriver and a locking screw according to claim 8, wherein the extension sleeve extractor includes a handle, the handle is provided at the axial end of the sleeve having the inner recess, and the handle can be continuously rotated to The second axial end of the locking screwdriver resists the inner recess and disengages the extension sleeve from the two fins of the support member.