阅读说明：本技术 一种经皮髌骨骨折复位器 (Percutaneous patella fracture restorer ) 是由 李升� 郭跻超 赵龙彪 于 2021-09-06 设计创作，主要内容包括：本发明涉及医疗器械技术领域,提出了一种经皮髌骨骨折复位器,包括底座及若干个通过活动机构设置在底座上的水平杆,活动机构包括设置在底座上的升降机构以及设置在升降机构上且随升降机构升降的水平调节机构,水平杆借助水平调节机构和升降机构在三维空间内移动,若干个水平杆朝向髌骨一端均为尖端,尖端用于穿过皮肤抵接在髌骨上。通过上述技术方案,解决了相关技术中髌骨骨折复位时,需要切开复位,对患者造成较大创伤的问题。(The invention relates to the technical field of medical instruments, and provides a percutaneous patellar fracture restorer which comprises a base and a plurality of horizontal rods arranged on the base through a movable mechanism, wherein the movable mechanism comprises a lifting mechanism arranged on the base and a horizontal adjusting mechanism arranged on the lifting mechanism and lifted along with the lifting mechanism, the horizontal rods move in a three-dimensional space through the horizontal adjusting mechanism and the lifting mechanism, one ends of the horizontal rods facing to a patella are all sharp ends, and the sharp ends are used for being abutted against the patella through skin. Through the technical scheme, the problem that when the patella fracture is reset in the related technology, the patella fracture needs to be cut open for resetting, and a large wound is caused to a patient is solved.)

1. The utility model provides a percutaneous patellar fracture restorer, its characterized in that passes through activity mechanism (2) including base (1) and a plurality of and sets up horizontal rod (3) on base (1), activity mechanism (2) are including setting up elevating system (4) and setting on base (1) are in elevating system (4) are gone up and are followed horizontal adjustment mechanism (5) that elevating system (4) go up and down, horizontal rod (3) with the help of horizontal adjustment mechanism (5) with elevating system (4) remove in three-dimensional space, a plurality of horizontal rod (3) are most advanced towards patellar one end, most advanced skin butt is passed to be used for passing on the patellar.

2. The percutaneous patellar fracture reduction device according to claim 1, wherein the lifting mechanism (4) comprises a vertical rod (6) disposed on the base (1), a sliding block (7) slidably and rotatably disposed on the vertical rod (6), and a lifting screwing valve (8) for locking the sliding block (7) and the vertical rod (6), the horizontal rod (3) is slidably disposed on the sliding block (7) along a horizontal direction, the horizontal adjusting mechanism (5) is a horizontal screwing valve (40), and the horizontal screwing valve (40) locks the sliding block (7) and the horizontal rod (3).

3. The percutaneous patellar fracture repositor according to claim 1, wherein the lifting mechanism (4) comprises a lifting driving mechanism (9) provided on the base (1) and a lifting rod (10) provided on the base (1) to be lifted in a vertical direction by means of the lifting driving mechanism (9), and the horizontal adjustment mechanism (5) is provided on the lifting rod (10).

4. A percutaneous patellar fracture reduction device according to claim 3, wherein the lifting driving mechanism (9) comprises a first tooth (11) arranged on the lifting rod (10) and a driving gear set (12) engaged with the first tooth (11), the driving gear set (12) comprises a first gear (14) rotatably arranged on the base (1) through a rotating shaft (13), an intermediate gear (15) engaged with the first gear (14) and a second gear (16) coaxially arranged with the intermediate gear (15), the second gear (16) is engaged with the first tooth (11), and the rotating shaft (13) is driven by the handle (17) to rotate to drive the lifting rod (10) to lift.

5. A percutaneous patellar fracture reduction device according to claim 4, wherein the lifting drive mechanism (9) further comprises a positioning mechanism (18) for preventing the rotation shaft (13) from being reversed, the positioning mechanism (18) comprises a ratchet wheel (19) arranged on the rotation shaft (13) and a pressing mechanism (20) arranged on the base (1) for abutting against the ratchet wheel (19), the pressing mechanism (20) comprises a pressing member (21) and a pressing member (22) rotatably arranged on the base (1), the pressing member (22) abuts against the pressing member (21), the pressing member (21) abuts against the ratchet wheel (19), and the pressing member (22) provides a force for the pressing member (21) to face the ratchet wheel (19).

6. A percutaneous patellar fracture reduction device according to claim 5, wherein one end of the pressing component (22) abutting against the pressing component (21) is an elastic sheet (23), the pressing component (21) is rotatably arranged on the base (1) through a mandrel (24), the other end of the mandrel (24) is provided with a pressing component (25), and the pressing component (25) drives the pressing component (21) to reversely rotate away from the ratchet wheel (19) against the force of the pressing component (22).

7. A percutaneous patellar fracture reduction device according to claim 3, wherein the horizontal adjustment mechanism (5) comprises a horizontal rotation mechanism (26) provided on the lifting rod (10) and a position adjustment mechanism (27) provided on the horizontal rotation mechanism (26), the horizontal rod (3) is slidably provided on the horizontal rotation mechanism (26), the position adjustment mechanism (27) positions the position between the horizontal rod (3) and the horizontal rotation mechanism (26), the horizontal rotation mechanism (26) comprises

A locking box (28) arranged at the top end of the lifting rod (10), wherein the top end inside the locking box (28) is provided with second teeth (29) distributed in a circular shape,

a fluted disc (30) which is arranged in the locking box (28) through an elastic piece, wherein the elastic piece is abutted against the lower part of the fluted disc (30) to provide a force for the fluted disc (30) to be close to the second teeth (29), the fluted disc (30) is provided with a plurality of third teeth (31) which are arranged along the radius direction, the third teeth (31) are uniformly arranged along the circumferential direction, and the third teeth (31) are meshed with the second teeth (29),

and the connecting shaft (32) penetrates through the locking box (28) and is arranged on the fluted disc (30) to drive the fluted disc (30) to rotate on the elastic piece, and the horizontal rod (3) is arranged on the connecting shaft (32) through a position adjusting mechanism (27) and rotates along with the connecting shaft (32).

8. A percutaneous patellar fracture reduction device according to claim 7, wherein the position adjustment mechanism (27) comprises

A dial (33) having a scale thereon, provided on the lock case (28),

the rotary disc (34) is arranged on the connecting shaft (32) and rotates along with the connecting shaft (32), a pointer (35) is arranged on the rotary disc (34), the pointer (35) points to scales on the dial disc (33),

guide holder (36), set up on carousel (34), horizontal pole (3) slide to set up on guide holder (36), horizontal pole (3) with guide holder (36) are through retaining member (37) locking.

9. The percutaneous patellar fracture reduction device according to claim 8, further comprising

And the buffer piece (38) is arranged on the locking box (28) at one end, and the other end of the buffer piece is abutted to the rotary disc (34) to provide the force for keeping the rotary disc (34) away from the locking box (28).

10. The percutaneous patellar fracture reduction device according to claim 4, wherein the elevation driving mechanism (9) further comprises a protective cover (39) disposed on the base (1), the protective cover (39) covering the driving gear set (12) in an inner space.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a percutaneous patellar fracture restorer.

Background

The patella is the largest clavicle in the human body, the fracture of the patella is caused by trauma, and violence directly acts on the patella or quadriceps femoris muscle to shrink violently, so that the integrity of the patella is lost. The patella fracture can be cured through general treatment and surgical treatment, and the treatment aim of the patella fracture is to restore the function of the knee joint, so that a patient can walk early and the patella is kept as much as possible.

The operation treatment is in the treatment of patellar fracture, and the most common treatment mode generally needs to carry out the incision earlier, upwards opens the flap, can see the patellar fracture piece, reuses fracture pincers that reset, and the point portion through the pincers that reset contacts the patella, and the centre gripping patella makes the patella in gap reset, and after the completion that resets, follow-up ke shi needle that reuses is fixed and screw implantation. The existing treatment mode needs to cut the skin firstly and then reset, has larger wound to a patient and long follow-up recovery period, and some reset structures coat the patella to influence the perspective observation of the patella after the later reset.

Disclosure of Invention

The invention provides a percutaneous patellar fracture repositor, which solves the problem that the patellar fracture needs to be cut open for reposition and causes great trauma to patients in the related technology.

The technical scheme of the invention is as follows:

the utility model provides a percutaneous patella fracture restorer, passes through the guiding mechanism setting including base and a plurality of and is in horizontal pole on the base, guiding mechanism is including setting up elevating system and setting on the base are in elevating system is last and along the horizontal adjustment mechanism that elevating system goes up and down, the horizontal pole with the help of horizontal adjustment mechanism with elevating system removes in three-dimensional space, a plurality of the horizontal pole is most advanced towards patella one end, most advanced is used for passing the skin butt and is in on the patella.

As a further technical scheme, elevating system is including setting up pole setting on the base, slip and rotation setting are in slider and the locking in the pole setting the slider with the lift valve of screwing of pole setting, the horizon bar slides along the horizontal direction and sets up on the slider, horizontal adjustment mechanism is the level valve of screwing, the level valve of screwing locks the slider with the horizon bar.

As a further technical solution, the lifting mechanism includes a lifting driving mechanism disposed on the base and a lifting rod disposed on the base in a lifting manner along a vertical direction by the lifting driving mechanism, and the horizontal adjusting mechanism is disposed on the lifting rod.

As a further technical scheme, lift actuating mechanism is including setting up first tooth on the lifter and with the drive gear group of first tooth meshing, drive gear group including rotate through the pivot set up on the base first gear, with first gear meshing's intermediate gear and with the second gear of the coaxial setting of intermediate gear, the second gear with first tooth meshing, through the handle drives the pivot rotation drive the lifter goes up and down.

As a further technical solution, the lifting driving mechanism further includes a positioning mechanism for preventing the rotating shaft from reversing, the positioning mechanism includes a ratchet wheel disposed on the rotating shaft and a pressing mechanism disposed on the base for abutting against the ratchet wheel, the pressing mechanism includes a pressing member and a pressing member rotatably disposed on the base, the pressing member abuts against the pressing member, the pressing member abuts against the ratchet wheel, and the pressing member provides a force of the pressing member toward the ratchet wheel.

As a further technical scheme, one end of the pressing piece, which is abutted against the pressing piece, is an elastic piece, the pressing piece is rotatably arranged on the base through a mandrel, a pressing piece is arranged at the other end of the mandrel, and the pressing piece drives the pressing piece to overcome the force of the pressing piece to reversely rotate and leave the ratchet wheel.

As a further technical solution, the horizontal adjusting mechanism comprises a horizontal rotating mechanism arranged on the lifting rod and a position adjusting mechanism arranged on the horizontal rotating mechanism, the horizontal rod is slidably arranged on the horizontal rotating mechanism, the position adjusting mechanism positions the position between the horizontal rod and the horizontal rotating mechanism, and the horizontal rotating mechanism comprises

A locking box arranged at the top end of the lifting rod, wherein the top end inside the locking box is provided with second teeth which are distributed in a circular shape,

a fluted disc which is arranged in the locking box through an elastic piece, the elastic piece is abutted under the fluted disc to provide the force of the fluted disc close to the second teeth, the fluted disc is provided with a plurality of third teeth arranged along the radius direction, the plurality of third teeth are uniformly arranged along the circumference direction and are meshed with the second teeth,

the connecting shaft penetrates through the locking box and is arranged on the fluted disc to drive the fluted disc to rotate on the elastic piece, and the horizontal rod is arranged on the connecting shaft through the position adjusting mechanism and rotates along with the connecting shaft.

As a further technical scheme, the position adjusting mechanism comprises

A dial plate having scales thereon and disposed on the locking box,

the rotating disc is arranged on the connecting shaft and rotates along with the connecting shaft, a pointer is arranged on the rotating disc and points to the scales on the dial disc,

the guide holder sets up on the carousel, the horizon bar slides and sets up on the guide holder, the horizon bar with the guide holder passes through retaining member locking.

As a further technical proposal, the method also comprises

And one end of the buffer piece is arranged on the locking box, and the other end of the buffer piece is abutted against the rotary disc to provide a force for keeping the rotary disc away from the locking box.

As a further technical solution, the lifting drive mechanism further includes a protective cover disposed on the base, and the protective cover covers the drive gear group in the inner space.

The working principle and the beneficial effects of the invention are as follows:

the invention aims to solve the problem that incision reduction is needed to cause great trauma to a patient when patellar fracture reduction is carried out in the related technology. The conception of the application for solving the problems lies in that the horizontal rod with the tip end penetrates through the skin of a patient and is reset through the skin without incision and resetting, the minimally invasive treatment of patellar fracture can be realized by utilizing the minimally invasive fixing technology in a matching way after resetting, and the horizontal rod can realize various adjustments of bone block rotation, lifting, pressurization and the like by virtue of the three-dimensional movable module consisting of the horizontal adjusting mechanism and the lifting mechanism. The base of carbon fiber material can be selected to the base, does not develop, does not have patella top and side metal structure, does not influence the fluoroscopy inspection after the fracture resets.

When a serious fracture is faced, because the number of the fracture blocks is too large, the operation reduction is generally selected, most of the application occasions of the restorer in the application are the condition of slight fracture, and the reduction can be realized by pressurizing through the tip of the horizontal rod. The utility model discloses a kneecap, including the kneecap, horizontal rod, horizontal adjusting mechanism, the kneecap is provided with a plurality of horizontal rods, the horizontal adjusting mechanism is provided with a plurality of horizontal rods, the horizontal rods are arranged on the base, the horizontal rods are provided with a plurality of horizontal rods, the horizontal rods are provided with the horizontal rods, the. As the condition of the human body varies, the pressurizing direction and force can be adjusted at any time according to the actual condition in the whole process of using the patella repositor to reposition the patella.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a lift driving mechanism according to the present invention;

FIG. 3 is a schematic structural view of a horizontal rotation mechanism according to the present invention;

FIG. 4 is a schematic view of the position adjustment mechanism of the present invention;

FIG. 5 is a structural view of a fluted disc according to the present invention;

FIG. 6 is a schematic structural view of the present invention for realizing the lifting and rotating by the sliding block;

in the figure: 1. a base, 2, a movable mechanism, 3, a horizontal rod, 4, a lifting mechanism, 5, a horizontal adjusting mechanism, 6, a vertical rod, 7, a sliding block, 8, a lifting screwing valve, 9, a lifting driving mechanism, 10, a lifting rod, 11, a first tooth, 12, a driving gear set, 13, a rotating shaft, 14, a first gear, 15, an intermediate gear, 16, a second gear, 17, a handle, 18, a positioning mechanism, 19, a ratchet wheel, 20, a pressing mechanism, 21, the device comprises a pressing piece, 22, a pressing piece, 23, an elastic piece, 24, a mandrel, 25, a pressing piece, 26, a horizontal rotating mechanism, 27, a position adjusting mechanism, 28, a locking box, 29, a second tooth, 30, a fluted disc, 31, a third tooth, 32, a connecting shaft, 33, a dial, 34, a turntable, 35, a pointer, 36, a guide seat, 37, a locking piece, 38, a buffer piece, 39, a protective cover, 40 and a horizontal screwing valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.

Example 1

As shown in fig. 1 to 5, the present embodiment proposes

The utility model provides a percutaneous patella fracture restorer, passes through the horizon bar 3 that moving mechanism 2 set up on base 1 including base 1 and a plurality of, moving mechanism 2 is including setting up elevating system 4 on base 1 and setting up on elevating system 4 and along with the horizontal adjustment mechanism 5 of elevating system 4 lift, horizon bar 3 removes in three-dimensional space with the help of horizontal adjustment mechanism 5 and elevating system 4, 3 orientation patella one end of a plurality of horizon bar are most advanced, most advanced skin butt is used for passing on the patella.

In the embodiment, in order to solve the problem that the reduction of the patella fracture requires incision and large trauma to a patient in the related art. The conception of the application for solving the problems lies in that the horizontal rod 3 with the tip end penetrates through the skin of a patient and is reset through the skin without incision and resetting, the minimally invasive treatment of patellar fracture can be realized by utilizing the minimally invasive fixing technology after resetting, and the horizontal rod 3 can realize various adjustments such as bone block rotation, lifting, pressurization and the like by means of the three-dimensional movable module consisting of the horizontal adjusting mechanism 5 and the lifting mechanism 4. The base 1 can be selected from the base 1 made of carbon fiber materials, development is not carried out, no metal structure above and on the side of the patella exists, and perspective examination after fracture reduction is not influenced.

When a serious fracture is faced, the operation reduction is generally selected due to the excessive number of the fracture blocks, and the application occasions of the restorer in the application are mostly the condition of slight fracture, and the reduction can be realized by pressurizing the tip of the horizontal rod 3. Specifically, generally, adjust earlier elevating system 4 that is located base 1, horizontal pole 3 rises to the patella top along with elevating system 4, readjust horizontal adjustment mechanism 5, all directional patella with the most advanced of a plurality of horizontal pole 3, rethread horizontal adjustment mechanism 5 makes horizontal pole 3 keep present height and angle, to patella direction horizontal migration, go forward while readjusting elevating system 4 again, make the most advanced all butt of horizontal pole 3 on the patella, observe the reset condition of patella through perspective, adjust horizontal adjustment mechanism 5 at any time, make the patella move towards the direction of reseing, observe through perspective, finally realize reseing. As the condition of the human body varies, the pressurizing direction and force can be adjusted at any time according to the actual condition in the whole process of using the patella repositor to reposition the patella.

Further, the lifting mechanism 4 includes a lifting driving mechanism 9 provided on the base 1 and a lifting rod 10 provided on the base 1 to be lifted in the vertical direction by the lifting driving mechanism 9, and the horizontal adjusting mechanism 5 is provided on the lifting rod 10.

In this embodiment, the horizontal rod 3 is disposed on the horizontal adjusting mechanism 5, the three-dimensional adjustment of the horizontal rod 3 is realized by driving the lifting rod 10 to lift through the lifting mechanism 4, and the horizontal adjusting mechanism 5 disposed on the lifting rod 10 drives the horizontal rod 3 to rotate and move in the horizontal plane.

Further, the lifting driving mechanism 9 includes a first tooth 11 disposed on the lifting rod 10 and a driving gear set 12 engaged with the first tooth 11, the driving gear set 12 includes a first gear 14 rotatably disposed on the base 1 via a rotating shaft 13, an intermediate gear 15 engaged with the first gear 14, and a second gear 16 coaxially disposed with the intermediate gear 15, the second gear 16 is engaged with the first tooth 11, and the rotating shaft 13 is driven by the handle 17 to rotate to drive the lifting rod 10 to lift.

In this embodiment, in order to make the lifting adjustment more convenient, specifically, the handle 17 is rotated to drive the rotating shaft 13 and the first gear 14 on the rotating shaft 13 to rotate, the first gear 14 drives the intermediate gear 15 and the second gear 16 coaxial with the intermediate gear 15 to rotate, and the second gear 16 is engaged with the first teeth 11 on the lifting rod 10 to drive the lifting rod 10 to lift. Through three-level gear transmission, can change the precision and the speed of regulation through changing the drive ratio.

Further, the lifting driving mechanism 9 further comprises a positioning mechanism 18 for preventing the rotating shaft 13 from reversing, the positioning mechanism 18 comprises a ratchet wheel 19 arranged on the rotating shaft 13 and a pressing mechanism 20 arranged on the base 1 and used for abutting against the ratchet wheel 19, the pressing mechanism 20 comprises a pressing piece 21 and a pressing piece 22 which are rotatably arranged on the base 1, the pressing piece 22 abuts against the pressing piece 21, the pressing piece 21 abuts against the ratchet wheel 19, and the pressing piece 22 provides a force for the pressing piece 21 to face towards the ratchet wheel 19.

In this embodiment, in order to prevent the lifting rod 10 from being forced to fall back after rising and causing difficulty in patella reduction, the locating mechanism 18 is provided for preventing the rotation of the patella, and specifically, the locating mechanism is provided with the ratchet wheel 19 and the pressing mechanism 20 which are arranged on the rotating shaft 13, when the handle 17 drives the lifting mechanism 4 to rise, the rotating shaft 13 rotates forwards, at this time, the ratchet wheel 19 rotates normally, the pressing mechanism 20 does not clamp the ratchet wheel 19, but when the lifting rod 10 moves to a corresponding position, the rotating shaft 13 tends to rotate backwards due to gravity, at this time, the pressing mechanism 20 locks the ratchet wheel 19, and the ratchet wheel 19 is prevented from rotating backwards. Specifically, by the pressing piece 22 abutting against the pressing piece 21 and the pressing piece 21 abutting against the ratchet 19, the pressing piece 22 provides a force of the pressing piece 21 toward the ratchet 19.

Furthermore, one end of the pressing piece 22, which is abutted to the pressing piece 21, is an elastic sheet 23, the pressing piece 21 is rotatably arranged on the base 1 through a mandrel 24, a pressing piece 25 is arranged at the other end of the mandrel 24, and the pressing piece 25 drives the pressing piece 21 to overcome the force of the pressing piece 22 and reversely rotate to leave the ratchet 19.

In this embodiment, the pressing member 22 and the pressing member 21 are provided as two members, and particularly, due to such a structure, the pressing member 25 can be pressed downward, so that the pressing member 21 overcomes the force of the pressing member 22, tilts upward, the ratchet 19 is free from being bound, the anti-reverse function is eliminated, and the lifting rod 10 can be adjusted downward.

Further, the horizontal adjusting mechanism 5 comprises a horizontal rotating mechanism 26 arranged on the lifting rod 10 and a position adjusting mechanism 27 arranged on the horizontal rotating mechanism 26, the horizontal rod 3 is arranged on the horizontal rotating mechanism 26 in a sliding mode, the position adjusting mechanism 27 positions the position between the horizontal rod 3 and the horizontal rotating mechanism 26, and the horizontal rotating mechanism 26 comprises

A locking box 28 arranged at the top end of the lifting rod 10, wherein the top end inside the locking box 28 is provided with a second tooth 29 distributed in a circular shape,

a gear plate 30 disposed in the lock box 28 by an elastic member abutting on a lower side of the gear plate 30 to provide a force to the gear plate 30 to approach the second teeth 29, the gear plate 30 having a plurality of third teeth 31 radially disposed, the plurality of third teeth 31 being uniformly disposed along a circumferential direction, the third teeth 31 being engaged with the second teeth 29,

the connecting shaft 32 is disposed on the gear plate 30 through the locking box 28, and drives the gear plate 30 to rotate on the elastic member, and the horizontal rod 3 is disposed on the connecting shaft 32 through the position adjusting mechanism 27 and rotates with the connecting shaft 32.

In this embodiment, a specific mode of horizontal adjustment is provided, the horizontal angle of regulation that can be more accurate, the operation process is, after overcoming the elasticity of elastic component and pressing connecting axle 32, fluted disc 30 on the connecting axle 32 and the second tooth 29 on the locking box 28 break away from the meshing, rotate connecting axle 32, fluted disc 30 and elastic component are the butt, connecting axle 32 drives fluted disc 30 and rotates on the elastic component, after horizontal rod 3 above that rotates required angle, loosen connecting axle 32, fluted disc 30 still meshes with the tooth on the locking box 28, the meshing angle is different, but still can keep locking, only through pressing the operation, just can rotate horizontal rod 3 to required angle, and lock fast in the angle after rotating, and convenient operation.

Further, the position adjusting mechanism 27 includes

A dial 33, having a scale thereon, is provided on the lock case 28,

a rotating disc 34 arranged on the connecting shaft 32 and rotating along with the connecting shaft 32, the rotating disc 34 is provided with a pointer 35, the pointer 35 points to the scale on the dial 33,

and the guide seat 36 is arranged on the turntable 34, the horizontal rod 3 is arranged on the guide seat 36 in a sliding manner, and the horizontal rod 3 and the guide seat 36 are locked through the locking piece 37.

In this embodiment, the rotation angle can be further more accurate, the rotation angle can be read through the pointer 35 and the dial 33, the operation angle can be seen visually, the guide seat 36 on the turntable 34 can guide the horizontal rod 3, the horizontal rod 3 slides on the guide seat 36, the patella is pressurized and pushed until the required position is reached, the horizontal rod 3 and the guide seat 36 are retracted through the locking member 37, and the force applied by the horizontal rod 3 to the patella in the process is manually controllable.

Further, also comprises

A bumper 38, one end of which is disposed on the lock box 28 and the other end of which abuts against the dial 34, provides a force to move the dial 34 away from the lock box 28.

Further, the elevation drive mechanism 9 further includes a shield 39 provided on the base 1, and the shield 39 covers the drive gear group 12 in the internal space.

In this embodiment, the number of the horizontal rods 3 is four, and the horizontal rods are arranged along four directions, and are pressed and fixed in four directions, so that the resetting is firm.

Example 2

As shown in fig. 6, the present embodiment also proposes a percutaneous patellar fracture reduction device, which cannot adjust an accurate angle but has a simpler structure than embodiment 1, based on the same concept as embodiment 1 described above.

Including base 1 and a plurality of through the horizontal pole 3 of moving mechanism 2 setting on base 1, moving mechanism 2 is including setting up elevating system 4 on base 1 and setting up on elevating system 4 and along with the horizontal adjustment mechanism 5 of elevating system 4 lift, and horizontal pole 3 removes in three-dimensional space with the help of horizontal adjustment mechanism 5 and elevating system 4, and a plurality of horizontal pole 3 is most advanced towards patella one end, and most advanced is used for passing the skin butt on the patella.

Further, elevating system 4 is including setting up pole 6 on base 1, slip and rotate the lift valve of screwing 8 that sets up slider 7 and locking slider 7 and pole 6 on pole 6, and horizontal pole 3 slides along the horizontal direction and sets up on slider 7, and horizontal adjustment mechanism 5 is the level valve of screwing 40, and the level valve of screwing 40 locks slider 7 and horizontal pole 3.

In this embodiment, compared to embodiment 1, the structure is simpler and is suitable for clinical operation.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.