CN210631294U - Broken arm spanner for vertebral column pedicle screw - Google Patents

Abstract

The embodiment of the utility model provides a backbone pedicle of vertebral arch nail's broken arm spanner, it includes spanner sleeve and spanner rod, spanner sleeve's one end with the spanner rod is connected, and the other end has first opening, spanner sleeve includes a plurality of clamping parts that encircle arranging and enclose into its inner chamber in proper order, and is adjacent expansion gap has between the clamping part to when making backbone pedicle of vertebral arch nail's nail arm stretch into, it is a plurality of thereby the clamping part opens the expansion the inner chamber, and is a plurality of clamping part elasticity centre gripping nail arm is adjacent be equipped with stop gear between the clamping part, stop gear is used for the restriction adjacent opening angle of clamping part. The utility model discloses arm-breaking wrench can be effective, firm nail arm of clamping backbone pedicle of vertebral arch nail through a plurality of clamping parts to avoid the nail arm to drop, need not to set up external elastic component such as shell fragment, spring, simple structure is difficult to damage, and life is longer, can also effectively avoid the problem that spare part dropped.

Description

Broken arm spanner for vertebral column pedicle screw

Technical Field

The utility model relates to the technical field of medical equipment for orthopedic surgery, in particular to a broken arm wrench for a spinal pedicle screw.

Background

The spinal pedicle screw is a surgical implant, is a commonly used internal fixing system in spinal surgery, and is applicable to diseases such as spinal trauma, spinal tumors, spinal infectious diseases, spinal congenital deformities and the like. In the operation process of implementing relevant backbone nail stick system, it is an important step to carry out the arm breakage processing to the nail arm of backbone pedicle of vertebral arch nail, but the arm breakage processing apparatus of the backbone pedicle of vertebral arch nail commonly used at present can not be fine fixed the nail arm of backbone pedicle of vertebral arch nail, often can appear in clinic that the arm breakage processing apparatus part damages and leave over in the patient is internal, or the nail arm is left over the internal condition of patient and is taken place, and then lead to the failure of operation easily, arouse patient postoperative to infect, cause the risk of secondary operation to rise.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the utility model provides a simple structure, centre gripping are firm and the longer disconnected arm spanner of backbone pedicle of vertebral arch nail of life.

In order to solve the above problem, the embodiment of the present invention provides a technical solution:

the utility model provides a backbone pedicle of vertebral arch nail's broken arm spanner, includes spanner sleeve and spanner rod, spanner sleeve's one end with spanner rod connects, and the other end has first opening, spanner sleeve includes a plurality of clamping parts that encircle arranging in proper order and enclose into its inner chamber, and is adjacent expansion gap has between the clamping part to when making backbone pedicle of vertebral arch nail's nail arm stretch into, it is a plurality of thereby the clamping part opens the expansion the inner chamber, and a plurality of clamping part elasticity centre gripping nail arm is adjacent be equipped with stop gear between the clamping part, stop gear is used for the restriction adjacent the opening angle of clamping part.

In some embodiments, the limiting mechanism includes a first limiting portion and a second limiting portion, the first limiting portion is disposed on one of the two adjacent clamping portions, the second limiting portion is disposed on the other of the two adjacent clamping portions, and when the adjacent clamping portions are opened to a preset angle, the first limiting portion and the second limiting portion can be mutually clamped to prevent the clamping portions from being continuously opened.

In some embodiments, the first position-limiting portion is a position-limiting groove disposed on one of the clamping portions, the second position-limiting portion is a position-limiting block disposed on the other of the clamping portions, and the position-limiting block is embedded in the position-limiting groove.

In some embodiments, the limiting groove is a dovetail groove, and the limiting block is a dovetail-shaped projection.

In some embodiments, the adjacent clamping portions have opposite end faces, the expansion gap is formed between the two end faces, the limiting block is convexly arranged on one end face, and the limiting groove is arranged on the other end face.

In some embodiments, the number of the clamping portions is two, namely a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are arranged oppositely.

In some embodiments, one end of the wrench socket extends to form a connecting portion, the connecting portion is arranged at a non-zero angle with the wrench socket, the wrench rod is connected with the connecting portion so that the wrench socket and the wrench rod are arranged in a staggered manner, and one end of the wrench socket is provided with a second opening.

In some embodiments, the wrench socket, the connecting portion, and the wrench rod are a unitary structure.

In some embodiments, the wrench socket has anti-slip teeth on an inner surface thereof; and/or

And an anti-skidding structure is arranged at one end of the wrench rod, which is far away from the wrench sleeve.

In some embodiments, the lumen is rectangular in cross-section.

Compared with the prior art, the utility model discloses beneficial effect lies in:

the utility model discloses backbone pedicle of vertebral arch nail's broken arm spanner, when the nail arm of backbone pedicle of vertebral arch nail stretches into the inner chamber, elastic deformation can take place for the clamping part and open to thereby enlarge the inner chamber size and hold the nail arm and stretch into, meanwhile, a plurality of clamping parts can elastic clamp nail arm, stop gear is used for restricting the angle that opens of clamping part, in order to avoid the clamping part to open too big and lead to the clamping-force weak, can also avoid the clamping part because of opening too big and damage. This disconnected arm spanner passes through the nail arm of a plurality of clamping backbone pedicle of vertebral arch nails that clamping portion can be effective, firm to avoid the nail arm to drop, need not to set up external elastic component such as shell fragment, spring, simple structure is difficult to damage, and life is longer, can also effectively avoid the problem that spare part dropped.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments generally by way of example and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a schematic perspective view of a broken-arm wrench for a spinal pedicle screw according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a broken arm wrench of a vertebral pedicle screw according to an embodiment of the present invention;

fig. 3 is a schematic side view of the broken-arm wrench for spinal pedicle screws according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a wrench socket of a broken-arm wrench for a spinal pedicle screw according to an embodiment of the present invention;

fig. 5 is the end face structure diagram of the wrench socket of the broken arm wrench for the spinal pedicle screw of the embodiment of the present invention.

Description of reference numerals:

1-a spanner bar; 2-wrench socket; 3-a first opening; 4-a second opening; 5-a clamping part; 6-dovetail groove; 7-dovetail shaped bumps; 8-expansion gap; 9-a connecting part; 10-anti-slip structure.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and the specific embodiments, but not to be construed as limiting the invention.

The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present invention, when it is described that a specific device is located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

Referring to fig. 1 to 4, the embodiment of the utility model provides a disconnected arm spanner of backbone pedicle of vertebral arch nail, it includes spanner sleeve 2 and spanner rod 1, spanner sleeve 2's one end is connected with spanner rod 1, the other end has first opening 3, in order to can be through this first opening 3 with spanner sleeve 2 cover on the nail arm of backbone pedicle of vertebral arch nail, spanner sleeve 2 includes a plurality of clamping parts 5 of arranging and enclosing its inner chamber of encircleing in proper order, expansion gap 8 has between the adjacent clamping part 5, when making the nail arm of backbone pedicle of vertebral arch nail stretch into, thereby a plurality of clamping parts 5 can open the expansion inner chamber, and a plurality of clamping parts 5 can stretch into the backbone pedicle of vertebral arch nail arm of inner chamber by the elastic clamping, be equipped with stop gear between the adjacent clamping part 5, stop gear is used for limiting the angle that opens of adjacent clamping part 5.

Adopt the disconnected arm spanner of backbone pedicle of vertebral arch nail of above-mentioned structure for break off the nail arm of backbone pedicle of vertebral arch nail off with the fingers and thumb when implanting backbone pedicle of vertebral arch nail operation, this wrench sleeve 2 of disconnected arm spanner includes a plurality of clamping parts 5, has expansion gap 8 between the adjacent clamping part 5, also this wrench sleeve 2 has been cut apart by expansion gap 8 and has formed a plurality of clamping parts 5. When the nail arm at backbone pedicle of vertebral arch nail stretched into the inner chamber, elastic deformation can take place and open for clamping part 5 to thereby enlarge the inner chamber size and hold the nail arm and stretch into, meanwhile, a plurality of clamping parts 5 can also the elastic clamping nail arm, and stop gear is used for restricting the angle that opens of clamping part 5, opens too big and lead to the clamping-force weak in order to avoid clamping part 5, can also avoid clamping part 5 to damage because of opening too big. This disconnected arm spanner passes through the nail arm of a plurality of clamping backbone pedicle of vertebral arch nails that 5 can be effective, firm to avoid the nail arm to drop, need not to set up external elastic component such as shell fragment, spring, simple structure is difficult to damage, and life is longer, can also effectively avoid the problem that spare part dropped.

In some embodiments, the limiting mechanism may include a first limiting portion and a second limiting portion, the first limiting portion is disposed on one of the two adjacent clamping portions 5, the second limiting portion is disposed on the other of the two adjacent clamping portions 5, and when the adjacent clamping portions 5 are opened to a predetermined angle, the first limiting portion and the second limiting portion are engaged with each other to limit the opening angle of the adjacent clamping portions 5. For example, it may be configured that when the nail arm does not extend into the inner cavity, the adjacent sides of the adjacent clamping portions 5 are parallel to each other, when the nail arm extends, the adjacent clamping portions 5 are opened, and when the angle between the adjacent sides reaches 0.5 ° or 1 °, the first limiting portion and the second limiting portion are clamped to limit the adjacent clamping portions 5 to continue to be opened, so that the clamping portions 5 can elastically clamp the nail arm.

In some embodiments, the first position-limiting portion may be a position-limiting groove disposed on one of the two adjacent clamping portions 5, and the second position-limiting portion may be a position-limiting block disposed on the other of the two adjacent clamping portions, the position-limiting block being embedded in the position-limiting groove. When the adjacent clamping parts 5 are opened, the limiting grooves can limit the limiting blocks to be separated from the inner parts of the adjacent clamping parts, so that the purpose of limiting the opening angle of the adjacent clamping parts 5 is achieved. Of course, the first limiting part and the second limiting part can be other limiting structures as long as the first limiting part and the second limiting part can be matched to realize limiting.

In a preferred embodiment, as shown in fig. 4, the limiting groove may be a dovetail groove 6, the corresponding limiting block may be a dovetail projection 7, and an expansion gap 8 is formed between an outer edge of the dovetail projection 7 and an inner edge of the dovetail groove 6, so that when the adjacent clamping portions 5 are opened, the dovetail projection 7 can move a certain distance in a direction of being pulled out of the dovetail groove 6, so as to meet the purpose that the adjacent clamping portions 5 can be opened by a predetermined angle, and then the dovetail projection 7 is clamped with the dovetail groove 6, and the adjacent clamping portions 5 cannot be opened continuously. It should be noted that the limiting groove and the limiting block are not limited to dovetail shapes, but may be other shapes, such as T-shaped, circular, etc., as long as the limiting groove can limit the limiting block to be disengaged, and further limit the opening angle of the adjacent clamping portion 5.

In some embodiments, adjacent clamping portions 5 may have opposite end faces, and an expansion gap 8 is formed between the two end faces, wherein one end face is convexly provided with a limiting block, and the other end face is provided with a limiting groove. For example, the expansion gap 8 may be provided on the left or right side of the wrench socket 2, and thus, a stopper may be provided on the lower end surface and a stopper groove may be provided on the upper end surface. Of course, the expansion gap 8 may also be disposed on the top surface or the bottom surface of the wrench socket 2, so that a limiting block may be disposed on the left end surface and a limiting groove may be disposed on the right end surface.

In some embodiments, the number of the clamping portions 5 may be two, i.e., a first clamping portion and a second clamping portion, which are oppositely disposed. That is, the wrench socket 2 may include two portions, namely, a first clamping portion and a second clamping portion, and the two portions enclose an inner cavity of the wrench socket 2, an expansion gap 8 is provided between adjacent sides of the first clamping portion and the second clamping portion, and a limiting mechanism is further provided between adjacent sides of the first clamping portion and the second clamping portion. For example, the wrench socket 2 may be divided into a first clamping portion and a second clamping portion by forming an aperture on each of opposite sides of the wrench socket 2. When the nail arm is clamped, the first clamping part and the second clamping part can be opened towards opposite directions so as to enlarge the inner cavity to be enough for accommodating the nail arm and apply elastic clamping force to the nail arm. It should be noted that the number of the clamping portions 5 included in the wrench socket 2 is not limited to two, but may be, for example, three or more.

In a specific implementation process, the first clamping part and the second clamping part can be symmetrically arranged. Therefore, the elastic force applied to the nail arm by the first clamping part and the second clamping part is the same, and the stress of the nail arm is balanced. Of course, the first clamping portion and the second clamping portion are not limited to the above structure, for example, the first clamping portion may be a U-shaped groove, the second clamping portion may be a plate-shaped structure disposed at the notch of the U-shaped groove, and the two sides of the plate-shaped structure and the two ends of the U-shaped groove are respectively provided with a limiting mechanism, so that the purpose of elastically clamping the nail arm can be achieved. In a preferred embodiment, the cross section of the inner cavity formed by the first clamping part and the second clamping part can be rectangular, as shown in fig. 5, the first clamping part and the second clamping part can be respectively positioned at the top and the bottom, and the expansion gap 8 and the limiting part can be arranged at two sides of the inner cavity. Of course, the first clamping portion and the second clamping portion may be located on both sides, and the expansion gap 8 and the limiting portion may be disposed at the top and the bottom of the inner cavity.

To prevent the nail arm from falling, anti-slip teeth (not shown) may be provided on the inner surface of the wrench socket 2, and the anti-slip teeth may be strip-shaped anti-slip teeth, grid-shaped anti-slip teeth, spot-shaped anti-slip teeth, or other types of anti-slip teeth. Set up anti-skidding tooth at spanner sleeve 2's internal surface, the in-process that the roof that can make backbone pedicle of vertebral arch nail was handled is being carried out the roof of backbone pedicle of vertebral arch nail, increases the frictional force between spanner sleeve 2 and the nail arm, and then can effectively prevent that the nail arm from droing.

In some embodiments, the wrench may further include a connection portion 9, the connection portion 9 may be formed by extending one end of the wrench socket 2, the connection portion 9 may be disposed at a non-zero angle with the wrench socket 2, the wrench rod 1 is connected to the connection portion 9 so that the wrench socket 2 is disposed to be offset from the wrench rod 1, and one end of the wrench socket 2 is provided with the second opening 4. The connecting portion 9 may be integrally formed with the wrench socket 2 and the wrench rod 1, or may be fixedly connected with the wrench socket 2 and the wrench rod 1 by welding, clamping or other connecting methods. Through this connecting portion 9, can make the inner chamber of spanner sleeve 2 stagger with spanner pole 1 to can set up second opening 4 in spanner sleeve 2's one end, can stretch into the top utensil from second opening 4 to the inner chamber and release in order to follow first opening 3 with the nail arm of centre gripping in the inner chamber, conveniently take out the nail arm. In the implementation process, the wrench socket 2 and the wrench rod 1 may be configured to be disposed parallel to each other, or may be disposed at a non-zero angle. For example, after the connecting portion 9 is bent, the wrench socket 2 may continue to extend in the arrangement direction of the connecting portion 9. It should be noted that the angle between the wrench socket 2 and the wrench rod 1 can be set according to different broken arm treatment processes.

In some embodiments, to facilitate handling of the wrench, an anti-slip structure 10 may be provided at an end of the wrench rod 1 away from the wrench socket 2. For example, a net-shaped anti-slip tooth, a strip-shaped anti-slip tooth, a groove-shaped anti-slip tooth or other shapes of anti-slip teeth can be arranged on the surface of the end of the wrench rod 1 far away from the wrench socket 2. An anti-slip member such as a rubber anti-slip sleeve may be sleeved on an end of the wrench rod 1 away from the wrench socket 2. The anti-slip structure 10 is arranged on the wrench rod 1, so that the friction force between a user and the broken arm wrench of the spinal pedicle screw can be increased in the process of broken arm treatment of the spinal pedicle screw, and the broken arm wrench is prevented from falling off from the hand of the user.

The broken arm spanner of backbone pedicle of vertebral arch nail of this application embodiment, the roof of centre gripping backbone pedicle of vertebral arch nail that can stabilize to avoid it to drop, and simple structure, solid durable, life are longer, are difficult to take place the problem that spare part dropped.

Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or variations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. Additionally, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.

Claims (10)

1. The utility model provides a backbone pedicle of vertebral arch nail's broken arm spanner, includes spanner sleeve and spanner rod, spanner sleeve's one end with spanner rod connects, and the other end has first opening, its characterized in that, spanner sleeve includes a plurality of clamping parts that encircle arranging in proper order and enclose its inner chamber, and is adjacent expansion gap has between the clamping part to when making backbone pedicle of vertebral arch nail's nail arm stretch, it is a plurality of thereby the clamping part opens the expansion the inner chamber, and a plurality of clamping part elasticity centre gripping nail arm is adjacent be equipped with stop gear between the clamping part, stop gear is used for the restriction adjacent the angle that opens of clamping part.

2. The broken arm wrench of the spinal pedicle screw according to claim 1, wherein the limiting mechanism comprises a first limiting portion and a second limiting portion, the first limiting portion is disposed on one of the two adjacent clamping portions, the second limiting portion is disposed on the other one of the two adjacent clamping portions, and when the adjacent clamping portions are opened to a preset angle, the first limiting portion and the second limiting portion can be mutually clamped to prevent the clamping portions from being continuously opened.

3. The broken arm wrench of the spinal pedicle screw according to claim 2, wherein the first limiting portion is a limiting groove disposed on one of the clamping portions, the second limiting portion is a limiting block disposed on the other of the clamping portions, and the limiting block is embedded in the limiting groove.

4. The broken arm wrench of the vertebral pedicle screw according to claim 3, wherein the limiting groove is a dovetail groove, and the limiting block is a dovetail-shaped projection.

5. The broken arm wrench of the spinal pedicle screw according to claim 3, wherein the adjacent clamping portions have opposite end surfaces, the expansion gap is formed between the two end surfaces, the limiting block is convexly arranged on one end surface, and the limiting groove is arranged on the other end surface.

6. The broken arm wrench of the spinal pedicle screw according to claim 1, wherein the number of the clamping portions is two, and the two clamping portions are respectively a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are oppositely arranged.

7. The arm breaking wrench for a spinal pedicle screw according to claim 1, wherein one end of the wrench socket extends to form a connecting portion, the connecting portion is arranged at a non-zero angle with the wrench socket, the wrench rod is connected with the connecting portion so that the wrench socket and the wrench rod are arranged in a staggered manner, and a second opening is formed at one end of the wrench socket.

8. The broken arm wrench of spinal pedicle screw according to claim 7, wherein the wrench socket, the connecting portion and the wrench rod are of an integrated structure.

9. The broken arm wrench of the spinal pedicle screw according to claim 1, wherein anti-slip teeth are provided on an inner surface of the wrench socket; and/or

And an anti-skidding structure is arranged at one end of the wrench rod, which is far away from the wrench sleeve.

10. The broken arm wrench of spinal pedicle screw according to claim 1, wherein the section of the inner cavity is rectangular.

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