Tibia sighting device

Abstract

The utility model relates to a tibia sighting telescope, and relates to the field of orthopedic surgical instruments, the tibia sighting telescope comprises a sighting device main body, a positioner, a guide sleeve shaft and a locking piece shaft, the sighting device main body and the positioner are arc-shaped pieces, the circle centers of arcs of the sighting device main body and the positioner coincide, and the sighting device main body and the positioner are in sliding connection; the sliding direction of the positioner extends in the arc direction of the positioner, the guide sleeve shaft is detachably connected to the positioner, the locking piece shaft is detachably connected to the sighting device body, the length direction of the guide sleeve shaft coincides with the radial direction of the positioner, and the length direction of the locking piece shaft coincides with the radial direction of the sighting device body. The medical instrument has the effect that a user can conveniently adjust the advancing direction of the medical instrument in an operation.

Description

Technical Field

[0001] This application relates to the field of orthopedic surgical instruments, and particularly to a tibial aiming device. Background Art

[0002] The structure of the knee joint is complex and its function is relatively important. When there is a degenerative lesion in the knee joint, an artificial knee joint replacement surgery is required to treat severe joint lesions. During the surgery, the proximal tibial osteotomy of the knee joint is the most important step, and all tibial treatments of the knee joint are based on the osteotomy plane after this step for operation.

[0003] For related tibial treatment surgeries, an external positioning bracket needs to be used. The positioning bracket abuts against the tibia, enabling the medical device used for osteotomy to move and approach the lesion relying on the positioning bracket, thereby completing the osteotomy surgery and forming an osteotomy plane.

[0004] The above-mentioned related technical solutions have the following defects: The existing positioning bracket is difficult to adjust the orientation of the medical device. When it is necessary to adjust the cutting direction of the medical device, the positioning bracket is difficult to send the medical device into the lesion with high precision. Summary of the Utility Model

[0005] In order to facilitate the user to adjust the advancing direction of the medical device during the surgery, this application provides a tibial aiming device.

[0006] A tibial aiming device provided by this application adopts the following technical solutions:

[0007] A tibial aiming scope includes an aiming device main body, a locator, a guiding sleeve shaft, and a locking member shaft. Both the aiming device main body and the locator are arc-shaped members, and the centers of the arcs formed by the aiming device main body and the locator coincide. The aiming device main body and the locator are slidably connected, and the sliding direction of the locator extends along the direction of its own arc. The guiding sleeve shaft is detachably connected to the locator, and the locking member shaft is detachably connected to the aiming device main body. The length direction of the guiding sleeve shaft coincides with the radial direction of the locator, and the length direction of the locking member shaft coincides with the radial direction of the aiming device main body.

[0008] By adopting the above technical solutions, by providing a locator on the aiming device main body, the locator can slide relative to the aiming device main body along the arc. By providing a locking member shaft on the aiming device main body and a guiding sleeve shaft on the locator, the end of the locking member shaft can abut against the lesion. At this time, by sliding the locator, the included angle between the guiding sleeve shaft and the locking member shaft can be adjusted. The user inserts the medical device into the guiding sleeve shaft, enabling the medical device to approach the lesion at different angles and perform the surgery, which facilitates the user to adjust the advancing direction of the medical device during the surgery.

[0009] Optionally, a sliding groove is formed in the sight body, the positioner is slidably disposed in the sliding groove, a fixing bolt is threadedly connected to the sight body, the fixing bolt penetrates through the sight body, and the end of the fixing bolt is inserted into the sliding groove and abuts against the positioner.

[0010] By adopting the above technical solution, by forming a sliding groove in the sight body, the positioner is embedded and slidably connected in the sliding groove. The user can slide the positioner to any position in the sliding groove and screw the fixing bolt so that the fixing bolt abuts against the surface of the positioner, thereby fixing the positioner relative to the sight. At this time, the angle between the guide sleeve shaft and the locking member shaft is fixed, which can facilitate the user to move the medical device through the guide sleeve shaft.

[0011] Optionally, scale lines are formed on the positioner, the scale lines are arranged along the length direction of the positioner, and the scale lines are used to represent the included angle between the guide sleeve shaft and the locking member shaft.

[0012] By adopting the above technical solution, by forming scale lines on the positioner, the user can view the included angle between the guide sleeve shaft and the locking member shaft through the scale lines, which is convenient for the user to move the guide sleeve shaft to a position suitable for the operation.

[0013] Optionally, when the locking member shaft is installed on the sight body, the center of the arc formed by the end of the locking member shaft and the sight body coincides.

[0014] By adopting the above technical solution, when the user inserts the medical device into the guide sleeve shaft and advances, the medical device can advance along the length direction of the guide sleeve shaft and move to the position of the end of the locking member shaft. After the user abuts the end of the locking member shaft against the position where the operation is required, the medical device can be accurately moved to the position where the operation is required through the guide sleeve shaft, improving the operation accuracy and reducing the time-consuming for the user to adjust the medical device.

[0015] Optionally, end teeth grooves are formed on the outer wall of the guide sleeve shaft, and the end teeth grooves are used to increase the friction force at the end of the guide sleeve shaft.

[0016] By adopting the above technical solution, by forming end teeth grooves on the guide sleeve shaft, the end face of the guide sleeve shaft is made rough. When the guide sleeve shaft abuts against the lesion, the probability of the guide sleeve shaft slipping at the lesion can be reduced, further improving the movement accuracy of the medical device.

[0017] Optionally, sliding teeth grooves are formed on the outer wall of the guide sleeve shaft along the length direction of the guide sleeve shaft. An installation hole is formed on the positioner. The guide sleeve shaft is inserted into the installation hole. A positioning pin is slidably connected to the positioner. One end of the positioning pin is located outside the positioner, and the other end extends into the installation hole. A wedge tooth is provided at the end of the positioning pin, and the wedge tooth is used for engaging with the sliding teeth groove.

[0018] By adopting the above technical solution, by providing sliding tooth grooves on the guide sleeve shaft, when the guide sleeve shaft is inserted into the mounting hole, the sliding tooth grooves are clamped with the wedge teeth of the positioning pin. When the user pushes the guide sleeve shaft and makes the guide sleeve shaft approach the end of the locking member shaft, the guide sleeve shaft can slide. When the guide sleeve shaft slides in the direction away from the end of the locking member shaft, the user needs to slide the positioning pin to disengage the wedge teeth of the positioning pin from the sliding tooth grooves, further improving the installation stability of the guide sleeve shaft on the positioner.

[0019] Optionally, a clamping groove is provided on the locking member shaft, a mounting groove is provided on the aiming device main body, a clamping pin is slidably connected to the aiming device main body, one end of the clamping pin is located outside the aiming device main body, and the other end extends into the mounting groove. The clamping pin is used to be clamped in the clamping groove.

[0020] By adopting the above technical solution, by providing a clamping groove on the locking member shaft, the clamping pin can slide and be inserted into the clamping groove, further fixing the locking member shaft in the mounting groove through the clamping pin. After the user abuts the end of the locking member shaft against the lesion, the aiming device main body remains fixed relative to the locking member shaft, which can reduce the probability of the aiming device main body sliding along the length direction of the locking member shaft during the operation and improve the operation accuracy.

[0021] Optionally, a relief groove is provided on the clamping pin. The clamping pin slides to make the relief groove cooperate with the clamping groove and disconnect the locking member shaft from the aiming device main body.

[0022] By adopting the above technical solution, by providing a relief groove on the clamping pin, the clamping pin can slide to a position where the relief groove is flush with the clamping groove. At this time, the locking member shaft can be pulled out of the mounting groove, and the clamping pin can be disconnected from the locking member shaft by sliding a short distance, which is convenient for use.

[0023] In summary, the beneficial technical effects of the present application are as follows:

[0024] 1. By providing a positioner on the aiming device main body, the positioner can slide along an arc relative to the aiming device main body. By providing a locking member shaft on the aiming device main body and a guide sleeve shaft on the positioner, the end of the locking member shaft can abut against the lesion. At this time, by sliding the positioner, the included angle between the guide sleeve shaft and the locking member shaft can be adjusted. The user inserts a medical device into the guide sleeve shaft, enabling the medical device to approach the lesion at different angles and perform the operation, facilitating the user to adjust the advancing direction of the medical device during the operation;

[0025] 2. By providing sliding grooves on the guide sleeve shaft, when the guide sleeve shaft is inserted into the mounting hole, the sliding grooves are engaged with the wedge teeth of the positioning pin. When the user pushes the guide sleeve shaft and it approaches the end of the locking member shaft, the guide sleeve shaft can slide. When the guide sleeve shaft slides in the direction away from the end of the locking member shaft, the user needs to slide the positioning pin to disengage the wedge teeth of the positioning pin from the sliding grooves, further enhancing the installation stability of the guide sleeve shaft on the positioner.

[0026] 3. By providing a clamping groove on the locking member shaft, the clamping pin can slide and be inserted into the clamping groove, further fixing the locking member shaft in the mounting groove through the clamping pin. After the user abuts the end of the locking member shaft against the lesion, the aiming device body remains fixed relative to the locking member shaft, which can reduce the probability of the aiming device body sliding along the length direction of the locking member shaft during the operation and improve the surgical precision. Description of the Drawings

[0027] Figure 1 is the schematic diagram of the overall structure of the embodiment of the present application Figure 1 。

[0028] Figure 2 is the schematic diagram of the overall structure of the embodiment of the present application Figure 2 。

[0029] Figure 3 is the schematic diagram of the connection relationship between the aiming device body and the positioner of the embodiment of the present application.

[0030] Figure 4 is the schematic diagram of the structure of the guide sleeve shaft of the embodiment of the present application.

[0031] Figure 5 is the schematic diagram of the connection relationship between the guide sleeve shaft and the positioner of the embodiment of the present application.

[0032] Figure 6 is the schematic diagram of the structure of the locking member shaft of the embodiment of the present application.

[0033] Figure 7 is the schematic diagram of the installation structure of the clamping pin of the embodiment of the present application.

[0034] Reference Numerals: 1, aiming device body; 11, sliding groove; 111, clamping groove; 12, fixing bolt; 13, mounting groove; 14, clamping pin; 141, relief groove; 15, first return spring; 2, positioner; 21, clamping member; 22, scale line; 23, mounting hole; 24, positioning pin; 241, wedge tooth; 25, second return spring; 3, guide sleeve shaft; 31, end groove; 32, sliding groove; 4, locking member shaft; 41, clamping groove. Detailed Embodiments

[0035] The following further details the present application with reference to the accompanying drawings.

[0036] An embodiment of the present application discloses a tibial aiming device. Referring to Figure 1 and Figure 2 , it includes an aiming device main body 1, a locator 2, a guide sleeve shaft 3 and a locking member shaft 4. Both the aiming device main body 1 and the locator 2 are arc-shaped structures, and the arc directions of the aiming device main body 1 and the locator 2 are the same, that is, the centers of the arcs formed by the aiming device main body 1 and the locator 2 coincide. The aiming device main body 1 and the locator 2 are slidably connected, and the locator 2 can slide on the aiming device main body 1 along the direction of its own arc extension. The guide sleeve shaft 3 is detachably installed on the locator 2, and the locking member shaft 4 is detachably installed on the aiming device main body 1. When the locking member shaft 4 is fixed on the aiming device main body 1, the end of the locking member shaft 4 coincides with the center of the arc formed by the aiming device main body 1. At this time, the length direction of the guide sleeve shaft 3 points to the center of the arcs of the aiming device main body 1 and the locator 2. The guide sleeve shaft 3 is a hollow cylindrical structure, and medical devices such as syringes or scalpels can be inserted into the guide sleeve shaft 3 by the user. The user can adjust the position of the guide sleeve shaft 3 by sliding the end of the locking member shaft 4 against the patient's lesion, so that the guide sleeve shaft 3 points to the lesion from different directions, and then the medical device can move to the lesion from different orientations and perform surgery.

[0037] Referring to Figure 1 , Figure 2 and Figure 3 , a chute 11 is opened on the aiming device main body 1. The chute 11 is opened on the upper surface of the aiming device main body 1. The chute 11 is a blind groove structure. A clamping groove 111 is opened in the chute 11. The extending directions of the clamping groove 111 and the chute 11 are both arcs. The locator 2 is slidably connected in the chute 11. A clamping member 21 is connected to the side wall of the locator 2. The clamping member 21 is inserted into the clamping groove 111, so that the aiming device main body 1 and the locator 2 are kept connected. A fixing bolt 12 is detachably connected to the aiming device main body 1. The fixing bolt 12 is installed on the surface of the aiming device main body 1. The fixing bolt 12 penetrates through the aiming device main body 1 and is threadedly connected to the aiming device main body 1. The end of the fixing bolt 12 can be inserted into the chute 11 and abuts against the surface of the locator 2. When the user slides the locator 2 to move the guide sleeve shaft 3 to a suitable position for surgery, the user can screw the fixing bolt 12 to make the fixing bolt 12 abut against the locator 2, and then keep the locator 2 fixed relative to the aiming device main body 1, which is convenient for use.

[0038] Referring to Figure 1 and Figure 3 , a plurality of scale lines 22 are opened on the surface of the locator 2. The scale lines 22 extend along the arc formed by the locator 2. The scale lines 22 are used to show the included angle between the guide sleeve shaft 3 and the locking member shaft 4. The user can slide the locator 2 according to the scale lines 22, which further facilitates the user to move the guide sleeve shaft 3 to a suitable angle for surgery.

[0039] Referring to Figure 4 andFigure 5 At the end of the guide sleeve shaft 3, an end tooth groove 31 is provided. The surface of the end tooth groove 31 is relatively rough. After the user abuts the end of the guide sleeve shaft 3 against the lesion, the probability of the end of the guide sleeve shaft 3 sliding relative to the lesion can be reduced, so that the medical device inserted into the guide sleeve shaft 3 can accurately move to the lesion.

[0040] Refer to Figure 3 、 Figure 4 and Figure 5 On the end of the locator 2 far from the sighting device main body 1, an installation hole 23 is provided. The installation hole 23 penetrates the locator 2, and the guide sleeve shaft 3 is inserted into the installation hole 23. A sliding tooth groove 32 is provided on the outer surface of the guide sleeve shaft 3, and the sliding tooth groove 32 extends along the length direction of the guide sleeve shaft 3. A positioning pin 24 is slidably connected to the locator 2. One end of the positioning pin 24 extends out of the locator 2, and the other end is inserted into the installation hole 23 and is provided with a wedge tooth 241. When the guide sleeve shaft 3 is inserted into the installation hole 23, the wedge tooth 241 at the end of the positioning pin 24 can be stuck on the sliding tooth groove 32, so that the guide sleeve shaft 3 can be fixed relative to the locator 2.

[0041] Refer to Figure 5 A second return spring 25 is sleeved on the positioning pin 24. The second return spring 25 is installed in the locator 2. One end of the second return spring 25 abuts against the locator 2, and the other end abuts against the positioning pin 24. The second return spring 25 makes the wedge tooth 241 of the positioning pin 24 always abut against the sliding tooth groove 32 in the natural state. When the user needs to remove the guide sleeve shaft 3 from the locator 2, the user slides the positioning pin 24 to make the positioning pin 24 squeeze the second return spring 25. At this time, the wedge tooth 241 can be disengaged from the sliding tooth groove 32, so that the guide sleeve shaft 3 can be pulled out of the installation hole 23.

[0042] Refer to Figure 5 The sliding tooth groove 32 is engaged with the wedge tooth 241, and the inclined surfaces on the sliding tooth groove 32 and the wedge tooth 241 are fitted. When the user needs to abut the guide sleeve shaft 3 against the lesion, the user can push the guide sleeve shaft 3. At this time, the sliding tooth groove 32 abuts against the wedge tooth 241, so that the positioning pin 24 can slide vertically, and the end of the guide sleeve shaft 3 approaches the lesion. When the user needs to pull out the guide sleeve shaft 3, when the user pulls the guide sleeve shaft 3, the sliding tooth groove 32 is engaged with the wedge tooth 241, and the positioning pin 24 is difficult to overcome the elastic force of the second return spring 25 and slide. At this time, the guide sleeve shaft 3 is difficult to slide, and the user needs to manually slide the positioning pin 24 to make the guide sleeve shaft 3 slide along the direction away from the center of the arc formed by the locator 2.

[0043] Refer to Figure 3 、 Figure 6 and Figure 7, an installation groove 13 is formed on the sight body 1, and the locking member shaft 4 is detachably connected in the installation groove 13. A latch pin 14 is slidably connected to the sight body 1. One end of the latch pin 14 extends outside the sight body 1, and the other end is inserted into the installation groove 13. A clamping groove 41 is formed in the middle of the locking member shaft 4. The latch pin 14 is used to be inserted into the clamping groove 41, so that the latch pin 14 is clamped with the locking member shaft 4, and the locking member shaft 4 can be fixed on the sight body 1.

[0044] Refer to Figure 6 and Figure 7 , a first return spring 15 is arranged on the latch pin 14. The first return spring 15 is arranged in the sight body 1. One end of the first return spring 15 abuts against the latch pin 14, and the other end abuts against the sight body 1. The first return spring 15 keeps the latch pin 14 in a state of being clamped with the locking member shaft 4. The user needs to overcome the elastic force of the first return spring 15 and slide the latch pin 14 to make the latch pin 14 disconnect from the locking member shaft 4.

[0045] Refer to Figure 6 and Figure 7 , a relief groove 141 is formed on the side surface of the latch pin 14. The relief groove 141 is of a blind groove structure, and the clamping groove 41 is of a blind groove structure. The latch pin 14 is used to be inserted into the clamping groove 41 and clamp the locking member shaft 4. By pressing the latch pin 14, the user can make the latch pin 14 slide, so that the relief groove 141 slides to a position where it cooperates with the clamping groove 41. At this time, the latch pin 14 disconnects from the clamping groove 41, and the locking member shaft 4 can slide in the installation groove 13, so that the locking member shaft 4 can be removed from the sight body 1.

[0046] The implementation principle of the embodiment of the present application is as follows: By slidably connecting the locator 2 on the sight body 1, the user can install the locking member shaft 4 on the sight body 1, make the end of the locking member shaft 4 abut against the diseased part, and by sliding the locator 2, change the included angle between the guide sleeve shaft 3 and the locking member shaft 4. The user can insert a medical device into the guide sleeve shaft 3 and contact the lesion in different orientations.

[0047] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A tibia sight, characterized in that: The invention comprises a sight body (1), a locator (2), a guide sleeve shaft (3) and a locking shaft (4), wherein the sight body (1) and the locator (2) are arc-shaped parts, the arc centers of the sight body (1) and the locator (2) coincide with each other, the sight body (1) and the locator (2) are slidably connected, the sliding direction of the locator (2) extends along the direction of its own arc, the guide sleeve shaft (3) is detachably connected to the locator (2), the locking shaft (4) is detachably connected to the sight body (1), the length direction of the guide sleeve shaft (3) coincides with the radial direction of the locator (2), and the length direction of the locking shaft (4) coincides with the radial direction of the sight body (1).

2. A tibia aiming device according to claim 1, characterized in that: The sight body (1) is provided with a slide groove (11), the locator (2) is slidably arranged in the slide groove (11), the sight body (1) is threadedly connected with a fixing bolt (12), the fixing bolt (12) passes through the sight body (1), and the end of the fixing bolt (12) is inserted into the slide groove (11) and abuts against the locator (2).

3. A tibia aiming device according to claim 2, characterized in that: The positioner (2) is provided with a scale line (22), which is arranged along the length direction of the positioner (2). The scale line (22) is used to indicate the angle between the guide sleeve shaft (3) and the locking element shaft (4).

4. A tibia aiming device according to claim 1, characterized in that: When the locking shaft (4) is mounted on the sight body (1), the end of the locking shaft (4) coincides with the center of the arc formed by the sight body (1).

5. A tibia aiming device according to claim 1, characterized in that: The guide sleeve shaft (3) is provided with an end tooth groove (31), and the end tooth groove (31) is used to increase the friction force of the end of the guide sleeve shaft (3).

6. A tibia aiming device according to claim 1, characterized in that: The guide sleeve shaft (3) has a sliding tooth groove (32) on its outer wall, the sliding tooth groove (32) is opened along the length direction of the guide sleeve shaft (3), the positioner (2) has a mounting hole (23), the guide sleeve shaft (3) is inserted into the mounting hole (23), and the positioner (2) is slidably connected with a positioning pin (24), one end of the positioning pin (24) is located outside the positioner (2), and the other end extends into the mounting hole (23), and a wedge tooth (241) is provided at the end of the positioning pin (24), and the wedge tooth (241) is used to engage with the sliding tooth groove (32).

7. A tibia aiming device according to claim 1, characterized in that: The locking shaft (4) is provided with a snap-fitting groove (41), the sight body (1) is provided with a mounting groove (13), a snap-fitting pin (14) is slidably connected to the sight body (1), one end of the snap-fitting pin (14) is located outside the sight body (1), and the other end extends into the mounting groove (13), and the snap-fitting pin (14) is used to be snapped into the snap-fitting groove (41).

8. A tibia aiming device according to claim 7, characterized in that: The latch pin (14) is provided with a clearance groove (141), and the latch pin (14) slides to make the clearance groove (141) cooperate with the clamping groove (41) so as to disconnect the locking element shaft (4) from the sight body (1).

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