CN210301098U - Device for opening vertebral body - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, concretely relates to distraction device between centrum. An interbody distraction device comprising: a rack; the number of the bases is two, the two bases are arranged on the rack, at least one base can move along the rack, an inner locking plate and an outer locking plate are hinged to the base which can move along the rack, the outer end of the inner locking plate is inserted into the rack under the action of a first elastic piece, and the inner end of the outer locking plate is inserted into the rack under the action of a second elastic piece; the strutting assemblies are two groups and are respectively connected with the two bases, and the strutting assemblies extend in the same direction in parallel. The problem of among the prior art distraction device self can't pressurize, need use other pressure device, lead to the apparatus bulky, be unsuitable for the operation of wicresoft is solved.

Description

Device for opening vertebral body

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to distraction device between centrum.

Background

Medical distractors are known as common tools in spinal surgery and function primarily to longitudinally distract the distance between vertebral bodies. The common spreading tool is spreading forceps, two forceps handles rotate along a shaft pin under the condition of holding by hands, so that a jaw part of the two forceps handles is spread outwards, spreading operation is generally realized by means of pedicle screws implanted into vertebral bodies and a connecting rod, and when a groove at the jaw part is placed on the connecting rod, two sides of the jaw can prop against screw seats to be spread outwards. The spreading forceps in the prior art do not have a pressurizing function, and pressurizing is carried out by using the pressurizing forceps after spreading by using the spreading forceps, so that the structure is complex, the volume is large, and the spreading forceps are not suitable for minimally invasive operation.

SUMMERY OF THE UTILITY MODEL

In order to solve the unable pressurization of distraction device self among the prior art, need use other compression devices, lead to the apparatus bulky, be not suitable for the problem of wicresoft's operation, the utility model provides a distraction device between centrum has solved above-mentioned technical problem. The technical scheme of the utility model as follows:

an interbody distraction device comprising: a rack; the number of the bases is two, the two bases are arranged on the rack, at least one base can move along the rack, an inner locking plate and an outer locking plate are hinged to the base which can move along the rack, the outer end of the inner locking plate is inserted into the rack under the action of a first elastic piece, and the inner end of the outer locking plate is inserted into the rack under the action of a second elastic piece; the strutting assemblies are two groups and are respectively connected with the two bases, and the strutting assemblies extend in the same direction in parallel.

The inner locking plate and the outer locking plate are hinged on the base, and the inner end of the outer locking plate is inserted into the rack under the action of the second elastic piece, so that the base can only move outwards along the rack under the action of external force, and the distraction of the vertebral body can be realized; the outer end of the inner locking plate is inserted into the rack under the action of the first elastic piece, so that the base can only move inwards along the rack under the action of external force, and the pressurizing effect can be realized.

Further, both bases can move along the rack, and the two bases are symmetrical in structure.

Furthermore, still be provided with the unblock subassembly on the base, the unblock subassembly promotes interior locking plate with outer locking plate swings along the pin joint, makes the outer end of interior locking plate with the inner of outer locking plate breaks away from the rack.

Further, interior locking plate with outer locking plate is followed rack extending direction sets gradually on the base, the unblock subassembly sets up including sliding slider on the base, at least part of the one end of slider stretches into interior locking plate with between the base, at least part of the other end of slider stretches into outer locking plate with between the base, the both ends of slider promote interior locking plate and outer locking plate swing respectively.

Further, be provided with first breach on the outer end of interior locking plate, be provided with the second breach on the inner of outer locking plate, first breach with second breach homonymy sets up, the slider is the recess form that the high centre in both ends is low, at least part of one end of slider passes through first breach stretches into interior locking plate with between the base, at least part of the other end of slider passes through the second breach stretches into outer locking plate with between the base.

Further, the unblock subassembly still includes the regulating part of being connected with the slider, the regulating part drives the slider slides, be provided with the slot hole of spacing regulating part home range on the base.

Further, the outer end of the inner locking plate and the inner end of the outer locking plate are inserted into the rack vertically or approximately vertically.

Further, the middle part of interior locking plate with outer locking plate with the base is articulated, the inner of interior locking plate is provided with first according to the splenium, the outer end of outer locking plate still is provided with the second and presses the splenium.

Further, still include drive assembly, drive assembly include with the gear of rack toothing, the gear rotationally sets up on the base, at least one end of gear is connected with the handle.

Furthermore, the strutting assembly comprises a lever and a strutting handle, one end of the lever is hinged with the base, the other end of the lever is hinged with the strutting handle, the swinging direction of the lever relative to the base is vertical to the extending direction of the rack, and the swinging direction of the strutting handle relative to the lever is vertical to the extending direction of the rack.

Based on the structure, the utility model discloses the technological effect that can realize does:

1. the utility model discloses an opening device between centrums, through setting up articulated inner locking plate and outer locking plate that sets up on the base, the rack is inserted to the inner of outer locking plate under the effect of second elastic component, so the base can only be under the exogenic action along the outward motion of rack, can realize the expansion to the centrum; the outer end of the inner locking plate is inserted into the rack under the action of the first elastic piece, so that the base can only move inwards along the rack under the action of external force, and the pressurizing effect can be realized. The device combines the functions of distraction and pressurization, does not need to replace instruments when the distraction and pressurization operations are switched mutually in the operation, reduces the complexity of the operation, has small volume and is more suitable for minimally invasive operation;

2. the utility model discloses an interbody distraction device, through set up the breach on interior lockplate and outer locking plate, make the unlocking subassembly can promote interior lockplate and outer locking plate swing and break away from the rack through the mode that slides, then move the base along required direction; the unlocking assembly is further arranged to comprise a groove-shaped sliding part with two high ends and a low middle part, at least parts of the two ends of the sliding part extend into the space between the inner locking plate and the base and between the outer locking plate and the base through notches in an initial state, the first notch and the second notch correspond to the groove parts of the sliding part, and when the outer locking plate needs to be unlocked, the sliding part moves inwards to push the outer locking plate to swing to separate from the rack; when the inner locking plate needs to be unlocked, the sliding piece moves outwards to push the inner locking plate to swing to be separated from the rack, so that the operation is convenient and the control is easy; an adjusting piece for driving the sliding piece to slide is further arranged, and a long hole for limiting the moving range of the adjusting piece is arranged on the base, so that the sliding range of the sliding block can be controlled;

3. the utility model discloses an interbody distraction device, through setting up two lockplates and having pressing parts, namely except that the unlocking structure, can also make the lockplate swing and break away from the rack through pressing the pressing part, relieve and lock;

4. the utility model ensures the stable matching between the locking plate and the rack by arranging the inner locking plate and the outer locking plate to be vertically or approximately vertically inserted into the rack; in addition, the movement direction of the base is convenient to control, for example, the outer end of the inner locking plate is inserted into the rack, when the outer locking plate is unlocked, the base can only move inwards, and if external force is adopted to enable the base to move outwards, the locking plate and the rack can be damaged; and vice versa. The accuracy of the operation is ensured;

5. the utility model adopts the method of driving the base by the gear, which is convenient to control the movement position of the base on the rack, and further convenient to control the spreading and pressurizing positions; the stability of the matching mode of the gear and the rack is high;

6. the utility model discloses a distraction device between centrum struts the subassembly and includes the lever and struts the pole, and the lever is all articulated with base, the handle of strutting, and the lever can swing with the base relatively of the pole of strutting, and swing direction perpendicular to rack extending direction so can guarantee to strut the effect of strutting of subassembly to the centrum, still can adjust the action point of the subassembly of strutting through swing lever and the pole of strutting.

Drawings

Fig. 1 is a schematic structural view of the intervertebral distractor of the present invention;

FIG. 2 is an exploded view of the base at one end of the rack;

FIG. 3 is a schematic view of the assembly of the base at the other end of the rack;

FIG. 4 is an exploded view of the mating of the gear and rack;

FIG. 5 is a schematic view of an assembled structure of a gear and a rack;

FIG. 6 is an exploded view of the distractor assembly;

in the figure: 1-a rack; 2-a base; 21-a seat body; 211-a third lug; 212-a fourth lug; 213-a through hole; 22-a sliding sleeve; 221-a fifth lug; 23-side plate; 231-long holes; 24-a through-hole; 25-mounting holes; 3-a distraction assembly; 31-a lever; 32-a spreading handle; 4-an inner locking plate; 41-a first lug; 42-a first pressing part; 5-an external locking plate; 51-a second lug; 52-a second pressing part; 6-a first elastic member; 7-a second elastic member; 8-an unlocking assembly; 81-a sliding member; 82-an adjustment member; 9-a drive assembly; 91-gear; 92-a front cover; 93-a rear cover; 94-handle.

Detailed Description

The invention will be further described with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "radial", "axial", "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1-6, the present embodiment provides an intervertebral body distraction device, which includes a rack 1, two bases 2 and distraction assemblies 3, wherein each base 2 is connected to a group of distraction assemblies 3, and at least one base 2 can move along the rack 1. When only one base 2 can slide along the rack 1, the other base 2 is fixedly arranged on the rack 1, and the two bases are different in structure. In this embodiment, both the bases 2 can move along the rack 1, and the two bases 2 have symmetrical structures.

The rack 1 extends linearly, the rack 1 has at least one plane extending along the extending direction of the rack, teeth are distributed on the plane, and the section of the rack 1 can be selected, but is not limited to be square or polygonal.

The base 2 is sleeved on the rack 1, the length direction of the base 2 is parallel to the extending direction of the rack 1, the base 2 comprises a base body 21 and a sliding sleeve 22 connected with two ends of the base body 21 or integrally formed, a through hole 24 penetrating through the base 2 is formed in the base 2 and is used for the rack 1 to pass through, and the cross section shape of the through hole 24 is the same as that of the rack 1. The sliding sleeve 22 located outside the seat body 21 is provided with a mounting hole 25, the mounting hole 25 is used for mounting the driving component 9, the sliding sleeve 22 located inside the seat body 21 is connected with the distraction component 3, the driving component 9 drives the base 2 to move along the rack 1, and the base 2 drives the distraction component 3 to move along the rack 1.

The driving assembly 9 includes a gear 91, the gear 91 is engaged with the rack 1, and the gear 91 is rotatably installed in the installation hole 25 through a front cover 92 and a rear cover 93. Specifically, a front cover 92 is screwed to the front end of the gear 91, a rear cover 93 is screwed to the rear end of the gear 92, and the front cover 92 and the rear cover 93 have circular cross sections at portions that engage with the mounting holes 25, so that the gear 92 can rotate relative to the base 2. One end of the rear cover 93, which is far away from the gear 91, is connected with a handle 94, the handle 94 is located outside the base 2, and the handle 94 can be rotated to drive the gear 91 to rotate, so as to drive the base 2 to move along the rack 1.

The opening assembly 3 comprises a lever 31 and an opening handle 32, one end of the lever 31 is hinged to the sliding sleeve 22, the other end of the lever 31 is hinged to the opening handle 32, the swinging direction of the lever 31 relative to the base 2 is perpendicular to the extending direction of the rack 1, and the swinging direction of the opening handle 32 relative to the lever 31 is perpendicular to the extending direction of the rack 1. Specifically, a fifth lug 221 extends on the sliding sleeve 22, and the lever 31 is hinged with the fifth lug 221. Two prop open the inner that subassembly 3 is located two bases 2 near each other, two prop open subassembly 3 parallel arrangement and syntropy and extend.

An inner locking plate 4 and an outer locking plate 5 are further arranged on the base 2, and the inner locking plate 4 and the outer locking plate 5 are inserted into the rack 1 under the action of the elastic piece. Interior locking plate 4 and outer locking plate 5 set gradually on base 2 along 1 extending direction of rack, and interior locking plate 4 and outer locking plate 5 interval and symmetry are installed on base 2. A first lug 41 extends from the middle of the inner locking plate 4, a third lug 211 extends from the seat body 21 of the base 2, and a pin shaft passes through the first lug 41 and the third lug 211 to realize that the inner locking plate 4 is hinged on the seat body 21. The outer end of the inner locking plate 4 passes through the seat body 21 under the action of the first elastic piece 6 and is inserted into the rack 1; specifically, the first elastic member 6 may be, but is not limited to, a torsion spring, and the first elastic member 6 jacks up the inner end of the inner locking plate 4 in a normal state so that the outer end of the inner locking plate 4 is inserted into the rack 1. In this embodiment, the first elastic element 6 is a torsion spring, the third lug 211 is disposed near the sliding sleeve 22 outside the seat body 21, the sliding sleeves 22 on both sides of the seat body 21 are higher than the seat body 21, the torsion spring is mounted on the pin, one end of the torsion spring abuts against the sliding sleeve 22, and the other end abuts against the inner end of the inner locking plate 4, so that the outer end of the inner locking plate 4 is inserted into the rack 1. Corresponding to the above structure, the middle of the outer locking plate 5 extends to form a second lug 51, the seat body 21 of the base 2 extends to form a fourth lug 212, and the pin shaft passes through the second lug 51 and the fourth lug 212 to realize the hinge joint of the outer locking plate 5 on the seat body 21. The inner end of the outer locking plate 5 passes through the seat body 21 under the action of the second elastic element 7 and is inserted into the rack 1, the structure of the second elastic element 7 can be the same as that of the first elastic element 6, and the installation structure of the second elastic element 7 can be symmetrically the same as that of the first elastic element 6.

Further, a through hole 213 is opened on the seat body 21 so that the outer end of the inner locking plate 4 and the inner end of the outer locking plate 5 are inserted into the rack 1 through the through hole 213.

Further, the base 2 is further provided with an unlocking assembly 8, the unlocking assembly 8 is used for unlocking the inner locking plate 4 and the outer locking plate 5, so that the inner locking plate 4 and/or the outer locking plate 5 are separated from the rack 1, and the base 2 can move along the rack 1. The unlocking assembly 8 comprises a sliding part 81 arranged on the base 2 in a sliding mode, the sliding part 81 can slide along the base body 21, at least part of one end of the sliding part 81 can stretch into the space between the inner locking plate 4 and the base 2, at least part of the other end of the sliding part 81 can stretch into the space between the outer locking plate 5 and the base 2, the sliding part 81 pushes the outer end of the inner locking plate 4 to deflect along a hinge point through sliding along the base body 21, and the inner end of the outer locking plate swings along the hinge point, so that unlocking of the inner locking plate 4 and the outer locking plate 5 is achieved. Specifically, by providing that the sliding member 81 includes two branches, one of which extends between the outer end of the inner locking plate 4 and the base 2 and the other of which extends between the inner end of the outer locking plate 5 and the base 2, the inner locking plate 4 or the outer locking plate 5 is pushed away from the rack 1 by sliding the sliding member 81 in the direction in which the rack 1 extends. In addition, other unlocking component structures can be arranged, so long as the unlocking function can be realized.

In this embodiment, be provided with first breach in setting up the outer end of interior locking plate 4, be provided with the second breach on the inner of outer locking plate 5, first breach and second breach homonymy setting, slider 81 is the recess form that both ends height middlely is low, at least part of the one end of slider 81 stretches into between interior locking plate 4 and the base 2 through first breach, at least part of the other end of slider 81 stretches into between outer locking plate 5 and the base 2 through the second breach, slide slider 81 promotes interior locking plate 4 or outer locking plate 5 and breaks away from rack 1 through following rack 1 extending direction. With the above-described unlocking structure, the unlocking of the inner lock plate 4 and the outer lock plate 5 can be realized, and the slider 81 can only unlock one of the two lock plates, preventing erroneous operation.

In order to facilitate the sliding of the control slider 81, the unlocking assembly 8 further comprises an adjusting member 82, the adjusting member 82 is connected with the slider 81, and the sliding of the slider 81 can be controlled by operating the adjusting member 82. Further, the side plate 23 extends from the seat body 21 of the base 2, the side plate 23 is provided with a long hole 231, the outer end of the adjusting member 82 far away from the sliding member 81 passes through the long hole 231 and extends out of the base 2, and the sliding range of the sliding member 81 is controlled by the position and length setting of the long hole 231.

Furthermore, the outer end of the inner locking plate 4 and the inner end of the outer locking plate 5 are arranged to be arc-shaped or bent, and the outer end of the inner locking plate 4 and the inner end of the outer locking plate 5 are vertically or approximately vertically inserted into the rack 1.

Further, the inner end of the inner locking plate 4 is provided with a first pressing portion 42, the outer end of the outer locking plate 5 is further provided with a second pressing portion 52, and the inner locking plate 4 and the outer locking plate 5 can be unlocked by pressing the first pressing portion 42 and the second pressing portion 52.

Preferably, the components of the distraction device are made of 17-4PH materials, the length of the two sliding sleeves 22 on the base 2 is 56mm, and the length of the rack 1 is 260 mm.

When the device for opening the vertebral body is used, opening or pressurizing is selected according to the operation requirement, the adjusting piece 82 is simultaneously pulled to the outer side, and then the handle 94 is rotated, so that the gear 91 drives the base 2 to slide to the outer side to realize opening; the adjusting member 82 is simultaneously pushed inward, and the handle 94 is rotated to make the gear 91 drive the base 2 to slide inward to realize pressurization. Simple structure and convenient operation.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. An interbody distraction device, comprising:

a rack (1);

the base (2), the number of the base (2) is two, the two bases (2) are arranged on the rack (1), at least one base (2) can move along the rack (1), the base (2) which can move along the rack (1) is hinged with an inner locking plate (4) and an outer locking plate (5), the outer end of the inner locking plate (4) is inserted into the rack (1) under the action of a first elastic piece (6), and the inner end of the outer locking plate (5) is inserted into the rack (1) under the action of a second elastic piece (7);

prop open subassembly (3), prop open subassembly (3) and be two sets of, be connected with two bases (2) respectively, it is two sets of prop open subassembly (3) parallel syntropy and extend.

2. An interbody distraction device according to claim 1, wherein both bases (2) are movable along said rack (1), both bases (2) being structurally symmetrical.

3. The intervertebral body distraction device according to claim 2, wherein an unlocking component (8) is further disposed on the base (2), and the unlocking component (8) pushes the inner locking plate (4) and the outer locking plate (5) to swing along a hinge point, so that the outer end of the inner locking plate (4) and the inner end of the outer locking plate (5) are separated from the rack (1).

4. An interbody distraction device according to claim 3, wherein the inner locking plate (4) and the outer locking plate (5) are sequentially arranged on the base (2) along the extension direction of the rack (1), the unlocking assembly (8) comprises a sliding member (81) slidably arranged on the base (2), at least a part of one end of the sliding member (81) extends between the inner locking plate (4) and the base (2), at least a part of the other end of the sliding member (81) extends between the outer locking plate (5) and the base (2), and two ends of the sliding member (81) respectively push the inner locking plate (4) and the outer locking plate (5) to swing.

5. The distraction device between vertebral bodies according to claim 4, wherein a first notch is provided on the outer end of the inner locking plate (4), a second notch is provided on the inner end of the outer locking plate (5), the first notch and the second notch are arranged on the same side, the sliding member (81) is in the shape of a groove with two high ends and a low middle, at least part of one end of the sliding member (81) extends into the space between the inner locking plate (4) and the base (2) through the first notch, and at least part of the other end of the sliding member (81) extends into the space between the outer locking plate (5) and the base (2) through the second notch.

6. An interbody distraction device according to claim 4, wherein the unlocking assembly (8) further comprises an adjusting member (82) connected to the sliding member (81), the adjusting member (82) drives the sliding member (81) to slide, and the base (2) is provided with a long hole (231) for limiting the range of motion of the adjusting member (82).

7. An interbody distraction device according to any of claims 1 to 6, wherein the outer ends of the inner locking plates (4) and the inner ends of the outer locking plates (5) are inserted perpendicularly or approximately perpendicularly into the rack (1).

8. An interbody distraction device according to any one of claims 1 to 6, wherein the middle portions of the inner locking plate (4) and the outer locking plate (5) are hinged to the base (2), the inner end of the inner locking plate (4) is provided with a first pressing portion (42), and the outer end of the outer locking plate (5) is further provided with a second pressing portion (52).

9. An interbody distraction device according to claim 1, further comprising a drive assembly (9), said drive assembly (9) comprising a gear (91) engaged with said rack (1), said gear (91) being rotatably disposed on the base (2), at least one end of said gear (91) being connected to a handle (94).

10. The intervertebral body distraction device according to claim 1, wherein the distraction assembly (3) comprises a lever (31) and a distraction handle (32), one end of the lever (31) is hinged to the base (2), the other end of the lever (31) is hinged to the distraction handle (32), the swinging direction of the lever (31) relative to the base (2) is perpendicular to the extending direction of the rack (1), and the swinging direction of the distraction handle (32) relative to the lever (31) is perpendicular to the extending direction of the rack (1).

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