Automatic stopping bone tunnel drill

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to an automatic stopping bone tunnel drill which comprises a shell, a fine drill is arranged on one side of the shell, and a first rough drill and a second rough drill are arranged on the fine drill. The first rough drill comprises a connecting rod, a sliding groove and second clamping grooves, a plurality of second clamping grooves are formed in the rod wall of the left side of the connecting rod at equal intervals, the left side of the connecting rod is slidably connected with an inner cavity of the right side of the second rough drill, screws are symmetrically connected to the right side of the second rough drill in a threaded mode, and the screws are connected with the second clamping grooves in an embedded mode; two sliding grooves are symmetrically formed in the rod wall of the connecting rod. A second rough drill slides on the connecting rod, the distance between the left end of the second rough drill and the left end of the thin drill rod can be adjusted, a screw can be embedded into a second clamping groove by rotating the screw, the second rough drill is fixedly connected with the connecting rod, and the effect of adjusting the drilling length of the thin drill is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and specifically relates to a self-stopping bone drill. Background Technique

[0002] Arthroscopic technique is a minimally invasive technique first used in orthopedics. It greatly improves the diagnostic rate of joint diseases, and now the treatment scope has developed to anterior and posterior cruciate ligament reconstruction. With the improvement of surgical instruments and the performance of arthroscopes themselves, the operation time required is significantly shortened, and the accuracy and pertinence of treatment will not decrease due to the shortening of time. On the contrary, it shows an obvious upward trend. In arthroscopic ligament reconstruction surgery of the knee joint, a bone drill is needed to drill a bone tunnel.

[0003] In the prior art, the utility model patent with the publication number CN 212661870 U discloses a femoral bone drill for arthroscopic ligament reconstruction surgery of the knee joint, which includes a thin hollow drill bit, a thick hollow drill bit, a nut, a collet, a main housing, a slider, a limiting sleeve, a guide pin, a return spring, a steel ball, a wire retaining ring, a mandrel, a spring, and a connecting rod; the main housing is provided with a guide pin, a return spring, a steel ball, and a wire retaining ring, and a collet and a nut are installed at the front end. The limiting sleeve is sleeved on the main housing. The thin hollow drill bit is fixedly connected to the slider, the slider is connected to the main housing, the mandrel, the spring, and the connecting rod are assembled into one body. The front end of the connecting rod is provided with concave teeth, which are controlled to be engaged and disengaged with the slider through the mandrel. The rear end of the connecting rod is connected to an electric drill, and the thick hollow drill is connected to the collet.

[0004] In the above patent, the engagement and disengagement with the slider are controlled by the mandrel to ensure that the length of the thin bone tunnel is a fixed value. After drilling through the bone cortex, the bone drill automatically stops rotating to avoid bursting the opposite bone cortex. However, the thickness of bones in different parts of the human body is different, so the length that the thin drill needs to drill is different. The length of the thin drill of this bone drill is fixed, and there is a problem that the drilling length of the thin drill cannot be freely adjusted.

[0005] Therefore, a self-stopping bone drill is proposed for the above problems. Content of the Utility Model

[0006] In order to make up for the deficiencies of the prior art and solve the problem that the drilling length of the thin drill of the existing bone drill is fixed and cannot be freely adjusted, a self-stopping bone drill is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a self-stopping bone drill of the utility model includes a housing, and a thin drill is arranged on one side of the housing, and a first thick drill and a second thick drill are arranged on the thin drill;

[0008] The rough drill 1 includes a connecting rod, a sliding groove, and a second clamping groove. A plurality of second clamping grooves are equidistantly formed on the left rod wall of the connecting rod. The left side of the connecting rod is slidably connected to the right inner cavity of the rough drill 2. Two screws are symmetrically threadedly connected to the right side of the rough drill 2, and the screws are fitted and connected with the second clamping grooves. Two sliding grooves are symmetrically formed on the rod wall of the connecting rod.

[0009] Preferably, the outer shell includes a housing, a limiting groove, and a first groove. A first groove and a limiting groove are formed in the housing. The limiting groove communicates with the first groove. A connecting component is arranged in the limiting groove. Two screws are symmetrically threadedly connected to the side wall of the housing.

[0010] Preferably, the connecting component includes a limiting rod and an arc-shaped groove. The right side of the limiting rod is fitted and connected with the limiting groove. An arc-shaped groove is formed on the right side of the limiting rod, and the arc-shaped groove is fitted and connected with the screw.

[0011] Preferably, the fine drill includes a fine drill rod, clamping blocks, and sliding blocks. Two sliding blocks are symmetrically and fixedly connected to the side surface of the fine drill rod. The sliding blocks are slidably connected with the sliding grooves. The right side of the fine drill rod is slidably connected with the first groove. Two clamping blocks are symmetrically and fixedly connected to the right end of the fine drill rod. The outer shell further includes a first clamping groove, and the first clamping groove is fitted and connected with the clamping blocks.

[0012] Preferably, the fine drill further includes a second groove, the connecting component further includes a bearing, and one end of the limiting rod is fixedly connected with the bearing, and the bearing is slidably connected with the second groove.

[0013] Preferably, a spring is arranged on the limiting rod. One end of the spring is embedded in the first groove, and the other end of the spring is in fit connection with the right end of the fine drill rod.

[0014] The beneficial effects of the present utility model:

[0015] The present utility model provides a self-stopping bone drill. By arranging the rough drill 2 to slide on the connecting rod, the distance between the left end of the rough drill 2 and the left end of the fine drill rod can be adjusted. Turning the screw can make the screw embed into the second clamping groove to fixedly connect the rough drill 2 and the connecting rod, achieving the effect of adjusting the drilling length dimension of the fine drill.

[0016] The present utility model provides a self-stopping bone drill. By arranging the outer shell, the fine drill, the connecting component, and the spring, when the fine drill rod drills through the human bone mass, the fine drill rod loses resistance, and the spring pushes the fine drill rod to move leftward in the first groove, so that the clamping blocks leave the first clamping groove, releasing the linkage between the fine drill rod and the housing, and realizing the self-stopping effect. Description of the Drawings

[0017] The accompanying drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 is the main structural view of the present utility model;

[0019] Figure 2 is the exploded view of the structural components of the present utility model;

[0020] Figure 3 is the enlarged right view of the fine drill structure of the present utility model;

[0021] Figure 4 is the enlarged left view of the housing structure of the present utility model.

[0022] Legend description:

[0023] 1. Housing; 101. Housing body; 102. Limiting groove; 103. First groove; 104. First clamping groove;

[0024] 2. Fine drill; 201. Fine drill rod; 202. Second groove; 203. Clamping block; 204. Slide block;

[0025] 3. First rough drill; 301. Connecting rod; 302. Sliding groove; 303. Second clamping groove;

[0026] 4. Second rough drill; 5. Screw;

[0027] 6. Connecting assembly; 601. Limiting rod; 602. Arc groove; 603. Bearing;

[0028] 7. Spring. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0030] The following gives specific embodiments.

[0031] Please refer to Figure 1 - Figure 2 , the present utility model provides a self-stopping bone drill, including a housing 1, a fine drill 2 is arranged on one side of the housing 1, and a first rough drill 3 and a second rough drill 4 are arranged on the fine drill 2;

[0032] The rough drill 3 includes a connecting rod 301, a chute 302 and a second card slot 303. A number of second card slots 303 are equidistantly arranged on the left rod wall of the connecting rod 301. The left side of the connecting rod 301 is slidably connected to the right inner cavity of the rough drill 4. The right side of the rough drill 4 is symmetrically threadedly connected with screws 5, and the screws 5 are fitted and connected with the second card slots 303. Two chutes 302 are symmetrically arranged on the rod wall of the connecting rod 301.

[0033] During operation, the rough drill 4 is pushed to move on the connecting rod 301, and the screw 5 is rotated so that the screw 5 is embedded in the first card slot 104, and the rough drill 4 is fixedly connected to the connecting rod 301, achieving the effect of adjusting the distance between the left end of the rough drill 4 and the left end of the fine drill 2.

[0034] Furthermore, as shown in Figure 1 - Figure 2 - Figure 4 Figure, the housing 1 includes a housing body 101, a limiting groove 102 and a first groove 103. A first groove 103 and a limiting groove 102 are arranged in the housing body 101. The limiting groove 102 communicates with the first groove 103. A connecting component 6 is arranged in the limiting groove 102. Two screws 5 are symmetrically threadedly connected to the side wall of the housing body 101.

[0035] During operation, the screw 5 is rotated to limit and fix the screw 5 to the connecting component 6, and the screw 5 fixedly connects one end of the connecting component 6 to the housing body 101.

[0036] Furthermore, as shown in Figure 1 - Figure 2 Figure, the connecting component 6 includes a limiting rod 601 and an arc groove 602. The right side of the limiting rod 601 is fitted and connected with the limiting groove 102. An arc groove 602 is arranged on the right side of the limiting rod 601, and the arc groove 602 is fitted and connected with the screw 5.

[0037] During operation, the screw 5 is rotated so that the screw 5 is embedded in the arc groove 602, and the limiting rod 601 is limited and fixed in the housing body 101.

[0038] Furthermore, as shown in Figure 1 - Figure 2 - Figure 3 Figure, the fine drill 2 includes a fine drill rod 201, a clamping block 203 and a sliding block 204. Two sliding blocks 204 are symmetrically and fixedly connected to the side surface of the fine drill rod 201. The sliding blocks 204 are slidably connected with the chutes 302. The right side of the fine drill rod 201 is slidably connected with the first groove 103. Two clamping blocks 203 are symmetrically and fixedly connected to the right end of the fine drill rod 201. The housing 1 further includes a first card slot 104, and the first card slot 104 is fitted and connected with the clamping block 203.

[0039] During operation, the clamping block 203 is fitted and connected with the first card slot 104, realizing the linkage between the fine drill rod 201 and the housing body 101.

[0040] Furthermore, as shown inFigure 1 - Figure 2 As shown, the fine drill bit 2 further includes a second groove 202, and the connecting assembly 6 further includes a bearing 603. One end of the limiting rod 601 is fixedly connected to the bearing 603, and the bearing 603 is slidably connected to the second groove 202.

[0041] During operation, the bearing 603 is slidably connected to the second groove 202 to limit and fix the limiting rod 601. At the same time, the bearing greatly reduces the rotational friction resistance between the fine drill rod 201 and the limiting rod 601, preventing the limiting rod 601 from driving the fine drill rod 201 to rotate.

[0042] Furthermore, as Figure 1 shown, a spring 7 is provided on the limiting rod 601. One end of the spring 7 is embedded in the first groove 103, and the other end of the spring 7 is in fit connection with the right end of the fine drill rod 201.

[0043] During operation, the spring 7 pushes the fine drill rod 201 to move to the left, causing the locking block 203 to leave the first card slot 104, disconnecting the linkage between the fine drill rod and the housing, and achieving self-stop.

[0044] Working principle: When using this self-stop bone drill, first slide the thick drill bit two 4 on the connecting rod 301 to adjust the distance between the left end of the thick drill bit two 4 and the left end of the fine drill rod 201. Rotate the screw 5 so that the screw 5 is embedded in the second card slot 303 to fixedly connect the thick drill bit two 4 and the connecting rod 301, and adjust the length dimension of the fine drill hole. Secondly, during drilling, the fine drill rod 201 receives an extrusion force, causing the fine drill rod 201 to move to the right on the limiting rod 601, so that the locking block 203 is embedded in the first card slot 104 to link the fine drill rod 201 and the housing 101. Thirdly, through the sliding connection between the slider 204 and the sliding groove 302, the fine drill rod 201 and the thick drill bit two 4 are linked to achieve the drilling operation. Then, when the fine drill rod 201 drills through the bone mass, the spring 7 pushes the fine drill rod 201 to move to the left in the first groove 103, causing the locking block 203 to leave the first card slot 104, releasing the linkage between the fine drill rod 201 and the housing 101, and achieving self-stop.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A self-stopping bone drill, comprising a housing (1), characterized in that: On one side of the said outer shell (1), there is a fine drill (2), and on the said fine drill (2), there are a first thick drill (3) and a second thick drill (4); The first thick drill (3) includes a connecting rod (301), a chute (302) and a second clamping groove (303). On the left rod wall of the connecting rod (301), a number of second clamping grooves (303) are equidistantly arranged. The left side of the connecting rod (301) is slidably connected to the inner cavity on the right side of the second thick drill (4). On the right side of the second thick drill (4), two screws (5) are symmetrically threadedly connected. The screws (5) are fitted and connected with the second clamping grooves (303). On the rod wall of the connecting rod (301), two chutes (302) are symmetrically arranged.

2. The self-stopping bone drill according to claim 1, characterized in that: The outer shell (1) includes a housing (101), a limiting groove (102) and a first groove (103). Inside the housing (101), there are a first groove (103) and a limiting groove (102). The limiting groove (102) communicates with the first groove (103). Inside the limiting groove (102), there is a connecting component (6). On the side wall of the housing (101), two screws (5) are symmetrically threadedly connected.

3. The self-stopping bone drill according to claim 2, wherein: The connecting component (6) includes a limiting rod (601) and an arc-shaped groove (602). The right side of the limiting rod (601) is fitted and connected with the limiting groove (102). On the right side of the limiting rod (601), there is an arc-shaped groove (602). The arc-shaped groove (602) is fitted and connected with the screw (5).

4. The self-stopping bone drill according to claim 3, characterized in that: The fine drill (2) includes a fine drill rod (201), clamping blocks (203) and sliding blocks (204). On the side surface of the fine drill rod (201), two sliding blocks (204) are symmetrically fixedly connected. The sliding blocks (204) are slidably connected with the chutes (302). The right side of the fine drill rod (201) is slidably connected with the first groove (103). At the right end of the fine drill rod (201), two clamping blocks (203) are symmetrically fixedly connected. The outer shell (1) further includes a first clamping groove (104). The first clamping groove (104) is fitted and connected with the clamping blocks (203).

5. The self-stopping bone drill according to claim 4, characterized in that: The fine drill (2) further includes a second groove (202). The connecting component (6) further includes a bearing (603). One end of the limiting rod (601) is fixedly connected with the bearing (603). The bearing (603) is slidably connected with the second groove (202).

6. The self-stopping bone drill according to claim 3, characterized in that: On the limiting rod (601), there is a spring (7). One end of the spring (7) is embedded in the first groove (103). The other end of the spring (7) is in fit connection with the right end of the fine drill rod (201).

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