CN211460473U - Telescopic device - Google Patents
Telescopic device Download PDFInfo
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- CN211460473U CN211460473U CN201920791700.5U CN201920791700U CN211460473U CN 211460473 U CN211460473 U CN 211460473U CN 201920791700 U CN201920791700 U CN 201920791700U CN 211460473 U CN211460473 U CN 211460473U
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Abstract
The utility model relates to the field of medical equipment, in particular to telescopic device. The device comprises a telescopic device, and is characterized in that: a sleeve structure; the nail rod structure is hollow in the whole body, the first end of the nail rod structure is inserted into the first end of the sleeve structure, a preset space is formed in the sleeve structure, and the nail rod structure can axially move along the sleeve structure in the preset space; limit structure, limit structure can restrict the first end roll-off of nail pole structure and predetermine the space. The nail rod structure can axially move along the sleeve structure in a preset space; the telescopic mechanism is implanted into a human body, can stretch out and draw back according to the healing condition of a wound, adapts to the length of the femoral neck, and ensures the stability of treatment and the safety of a patient when the femoral neck is contracted under stress.
Description
Technical Field
The utility model relates to the field of medical equipment, in particular to telescopic device.
Background
The cannulated nail technique has been validated and widely used in the treatment of femoral neck fractures.
As shown in fig. 1, it is a commonly used solution: the hollow nail 20 is provided with a nail rod which is a whole body and can be inserted into the femoral neck 11, the front end of the nail rod is provided with a thread head 22 which is tapped into the femoral head 12, and the rear end of the nail rod is provided with a nail cap 21 which is exposed out of the femoral tuberosity 13; wherein the stem of the hollow nail 20 is hollow. During actual treatment, the guide needle penetrates from the femoral tuberosity 13 to reach the interior of the femoral head 12, then the hollow nail 20 is installed, so that the femoral head 12 can be stable relative to the femoral tuberosity 13 in the radial direction of the ejector rod and is convenient to heal, and meanwhile, the threaded head 22 and the nail cap 21 of the hollow nail 20 can enable the femoral head 12 to be pressed relative to the femur, so that the healing process is accelerated.
However, the femoral neck 11 itself is not completely rigid, and with the factors of human body movement and the like, the femoral head 12 will be compressed in the axial direction of the hollow nail 20 relative to the femoral trochanter 13, so that two kinds of hidden troubles of the same kind are brought: as the femoral head 12 is pressed axially along the cannulated nail 20 towards the femoral trochanter 13, the threaded head 22 may cut the femoral head 12 and the nail cap 21 may be withdrawn from the femoral trochanter 13.
SUMMERY OF THE UTILITY MODEL
The utility model discloses it is that bone absorption back screw length can't shorten according to the absorption condition to probably cut out or withdraw from human technical problem.
In order to solve the technical problem, the utility model discloses a telescopic device. The device comprises:
a sleeve structure;
the nail rod structure is hollow in the whole body, the first end of the nail rod structure is inserted into the first end of the sleeve structure, a preset space is formed in the sleeve structure, and the nail rod structure can axially move along the sleeve structure in the preset space;
the limiting structure can limit the first end of the nail rod structure to slide out of the preset space.
Optionally, the limit structure includes a first limit structure and a second limit structure, the first limit structure and the second limit structure are respectively arranged at two ends of the preset space, the first limit structure limits the nail rod structure to move out of the first end of the preset space, and the second limit structure limits the nail rod structure to move out of the second end of the preset space.
Optionally, the nail rod structure includes first section nail rod and second section nail rod, first section nail rod is thicker, second section nail rod is thinner, first section nail rod with the first step face of radial formation of the contact surface of second section nail rod, second limit structure can the butt first step face, the restriction the nail rod structure shifts out the second end in predetermineeing the space.
Optionally, the second limit structure includes nut portion and nut portion edge court the spacing portion that the nut portion axle center direction extends, bushing structure's second end is equipped with third helicitic texture, nut portion with third helicitic texture screw thread locking, spacing portion can butt first step face, restriction the nail pole structure roll-off bushing structure's second end.
Optionally, the edge of the first end of the sleeve structure extends out along the radial direction to form a limiting portion, and the limiting portion can abut against the first step surface to limit the nail rod structure from moving out of the second end of the sleeve structure.
Optionally, the inner surface of the second end of the sleeve extends out of the limiting structure, and the limiting structure can limit the nail rod structure to move out of the second end of the preset space.
Optionally, the outer wall of the nail rod structure is provided with at least one groove with a preset length, the limiting structure corresponds to the groove in a one-to-one mode, the limiting structure penetrates through the part of the side wall of the sleeve structure and can be abutted to the first side face and the second side face which are opposite to each other in the groove, and the nail rod structure is arranged along the limit of the groove and slides out of the nail rod structure to form the preset space.
Optionally, the outer wall of the nail rod structure is provided with at least one groove with a preset length, the limiting structures correspond to the grooves one to one, the inner wall of the sleeve structure radially extends out of the limiting structures, the limiting structures can abut against the first side face and the second side face which are opposite in the grooves, and the nail rod structure is along the limit of the grooves and slides out of the nail rod structure to preset space.
Optionally, the outer wall of the nail rod structure is provided with at least one groove with a preset length, the limiting structures correspond to the grooves one to one, the edge of the first end of the sleeve structure extends out along the radial direction, the limiting structures can abut against the first side face and the second side face which are opposite in the groove, and the nail rod structure is limited by the groove and slides out of the nail rod structure to form the preset space.
Optionally, the preset space corresponds to the inner wall of the sleeve structure 31 is provided with a layer of elastic structure, the outer wall of the first end of the nail rod structure is provided with an uneven structure, the outer wall of the first end of the sleeve structure is provided with a threaded structure, the inner wall of the second end of the sleeve structure is provided with a threaded structure or the inner wall of the first end of the nail rod structure is provided with a threaded structure.
Adopt above-mentioned technical scheme, have following beneficial effect:
the nail rod structure can axially move along the sleeve structure in a preset space; the telescopic mechanism is implanted into a human body, can stretch out and draw back according to the healing condition of a wound, adapts to the length of the femoral neck, and ensures the stability of treatment and the safety of a patient when the femoral neck is contracted under stress.
The limiting structure can limit the first end of the nail rod structure to slide out of the preset space, so that the nail rod structure can be prevented from being cut out or exiting from a human body, and the stability of treatment is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of a common hollow nail used for treating femoral bone fracture in the prior art;
fig. 2 is a schematic structural diagram of a retractable device according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along A-A of the structure of FIG. 2;
fig. 4 is a schematic structural diagram of a retractable device according to another embodiment of the present invention;
fig. 5 is a schematic sectional view along the direction a-a of the structure of fig. 4.
The following is a supplementary description of the drawings:
31-a sleeve construction; 32-a limit structure; 321-a first limit structure; 332-a second limit structure; 33-nail shank configuration; 331-a second section of nail shank; 332-first section of nail shank; 3321-first step face; 333-groove.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with at least one implementation of the invention is included. In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
An embodiment of the utility model provides a telescopic device, see fig. 1, include:
the sleeve structure 31;
the nail rod structure 33 is hollow in the whole body, the first end of the nail rod structure 33 is inserted into the first end of the sleeve structure 31, a preset space is formed in the sleeve structure 31, and the nail rod structure 33 can move axially along the sleeve structure 31 in the preset space;
the limiting structure 32 is capable of limiting the first end of the nail rod structure 33 to slide out of the preset space through the limiting structure 32.
The nail shank structure 33 can move axially along the sleeve structure 31 in a preset space; the telescopic mechanism is implanted into a human body, can stretch out and draw back according to the healing condition of a wound, adapts to the length of the femoral neck, and ensures the stability of treatment and the safety of a patient when the femoral neck is contracted under stress.
In some embodiments, referring to fig. 2, further, the limiting structure 32 comprises a first limiting structure 321 and a second limiting structure 322, wherein the first limiting structure 321 limits the movement of the nail shaft structure 33 out of the first end of the preset space, and the second limiting structure 322 limits the movement of the nail shaft structure 33 out of the second end of the preset space.
Further, first limit structure 321 the nail rod structure 33 includes first section nail rod 332 and second section nail rod 331, first section nail rod 332 is thicker, second section nail rod 331 is thinner, first section nail rod 332 with the radial first step face 3321 that forms of the contact surface of second section nail rod 331, second limit structure 322 can butt first step face 3321, the restriction nail rod structure 33 shifts out the second end in predetermined space.
Further, second limit structure 322 includes nut portion and nut portion edge court the spacing portion that the nut portion axle center direction extends, bushing structure 31's second end is equipped with third helicitic texture, nut portion with third helicitic texture screw thread locking, spacing portion can the butt first step face 3321, the restriction the nail pole structure 33 roll-off bushing structure 31's second end.
In other embodiments, the edge of the first end of the sleeve structure 31 is extended radially to form a position-limiting part, and the position-limiting part can abut against the first stepped surface 3321 to limit the movement of the nail shank structure 33 out of the second end of the sleeve structure 31.
Further, the inner surface of the second end of the sleeve extends out of the limit structure 32, and the limit structure 32 can limit the nail rod structure 33 from moving out of the second end of the preset space.
In some embodiments, referring to fig. 4, the outer wall of the shank structure 33 is provided with at least one groove 333 with a predetermined length, the position-limiting structures 32 are in one-to-one correspondence with the grooves 333, the portions of the position-limiting structures 32 penetrating through the side walls of the sleeve structure 31 can abut against the first side and the second side opposite to each other in the grooves 333, and the shank structure 33 is limited by the grooves 333 from sliding out of the predetermined space from the shank structure 33.
Further, the outer wall of the nail rod structure 33 is provided with at least one groove 333 with a preset length, the limiting structures 32 correspond to the grooves 333 one by one, the inner wall of the sleeve structure 31 extends out of the limiting structures 32 along the radial direction, the limiting structures 32 can abut against the first side face and the second side face which are opposite to each other in the grooves 333, and the nail rod structure 33 slides out of the nail rod structure 33 along the limitation of the grooves 333 to form a preset space.
Further, the outer wall of the nail rod structure 33 is provided with at least one groove 333 with a preset length, the limiting structures 32 correspond to the grooves 333 one to one, the edge of the first end of the sleeve structure 31 extends out of the limiting structures 32 along the radial direction, the limiting structures 32 can abut against the first side face and the second side face which are opposite to each other in the grooves 333, and the nail rod structure 33 is limited by the groove 333 to slide out of the nail rod structure 33 from the preset space.
In some embodiments, the first end of the shank structure 33 is provided with an uneven structure, the first end of the sleeve structure 31 is provided with a thread structure, the second end of the sleeve structure 31 is provided with a thread structure, or the first end of the shank structure 33 is provided with a thread structure.
In some embodiments, the inner wall of the sleeve structure 31 corresponding to the predetermined space is provided with a layer of elastic structure. The elastic structure plays a role in buffering when the nail rod structure moves in the preset space along the axial direction of the sleeve structure.
The first end outer wall of the nail rod structure 33 is provided with an uneven structure, and the uneven structure clamps the human body structure, so that the nail rod structure 33 is locked in the human body better. The outer wall of the first end of the sleeve structure 31 is provided with a thread structure, so that the sleeve can be stably fixed on a top plate arranged on the outer side of a human body, and more stable fixation is formed.
In order to match the above structure, a matched locking device is arranged, and the matched locking device is divided into two sections of hexagonal quincuncial blocks with different specifications, and can be matched with the sleeve structure 31 and the nail rod structure 33 simultaneously to implant the telescopic device into a human body.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A retractable device, characterized in that:
a sleeve structure (31);
the nail rod structure (33) is hollow in the whole body, the first end of the nail rod structure (33) is inserted into the first end of the sleeve structure (31), a preset space is formed in the sleeve structure (31), and the nail rod structure (33) can move axially along the sleeve structure (31) in the preset space;
the limiting structure (32), the limiting structure (32) can limit the first end of the nail rod structure (33) to slide out of the preset space.
2. The telescopic device according to claim 1, characterized in that: limit structure (32) include first limit structure (321) and second limit structure (322), first limit structure (321) with second limit structure (322) set up respectively predetermine the both ends in space, first limit structure (321) restriction nail rod structure (33) shift out predetermine the first end in space, second limit structure (322) restriction nail rod structure (33) shift out predetermine the second end in space.
3. The telescopic device according to claim 2, characterized in that: the nail pole structure (33) includes that first section nail pole (332) and second section are followed closely pole (331), first section nail pole (332) is thicker, second section nail pole (331) are thinner, first section nail pole (332) with the first step face (3321) of radial formation of the contact surface of second section nail pole (331), second limit structure (322) can butt first step face (3321), the restriction nail pole structure (33) are shifted out predetermine the second end in space.
4. A telescopic device according to claim 3, characterized in that: second limit structure (322) include nut portion and nut portion edge court the spacing portion that the nut portion axle center direction extends, the second end of bushing structure (31) is equipped with third helicitic texture, the nut portion with third helicitic texture screw thread locking, spacing portion can the butt first step face (3321), the restriction nail pole structure (33) roll-off the second end of bushing structure (31).
5. A telescopic device according to claim 3, characterized in that: the edge of the first end of the sleeve structure (31) extends out of the limiting part along the radial direction, the limiting part can abut against the first step surface (3321) to limit the nail rod structure (33) to move out of the second end of the sleeve structure (31).
6. The telescopic device according to claim 1, characterized in that: the inner surface of the second end of the sleeve extends out of the limiting structure (32), and the limiting structure (32) can limit the nail rod structure (33) to move out of the second end of the preset space.
7. The telescopic device according to claim 1, characterized in that: the outer wall of the nail rod structure (33) is provided with at least one groove (333) with a preset length, the limiting structures (32) are in one-to-one correspondence with the grooves (333), the limiting structures (32) penetrate through the parts of the side walls of the sleeve structure (31) and can be abutted to the first side face and the second side face which are opposite to each other in the grooves (333), and the nail rod structure (33) is along the limit of the grooves (333) and slides out of the nail rod structure (33) to form a preset space.
8. The telescopic device according to claim 1, characterized in that: the outer wall of nail pole structure (33) is equipped with at least one recess (333) of a preset length, limit structure (32) with recess (333) one-to-one, limit structure (32) radially extend out to the inner wall of bushing structure (31), limit structure (32) can the butt relative first side and second side in recess (333), follow nail pole structure (33) the restriction of recess (333) nail pole structure (33) roll-off predetermine the space.
9. The telescopic device according to claim 1, characterized in that: the outer wall of nail pole structure (33) is equipped with at least one recess (333) of a preset length, limit structure (32) with recess (333) one-to-one, the edge of the first end of bushing structure (31) radially extends limit structure (32), limit structure (32) can butt relative first side and second side in recess (333), follow nail pole structure (33) the restriction of recess (333) nail pole structure (33) roll-off predetermine the space.
10. A telescopic device according to any one of claims 1 to 9, characterized in that: the preset space corresponds the inner wall of the sleeve structure (31) is provided with one layer of elastic structure, the first end outer wall of the nail rod structure (33) is provided with an uneven structure, the first end outer wall of the sleeve structure (31) is provided with a threaded structure, the second end inner wall of the sleeve structure (31) is provided with a threaded structure or the first end inner wall of the nail rod structure (33) is provided with a threaded structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920791700.5U CN211460473U (en) | 2019-05-29 | 2019-05-29 | Telescopic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920791700.5U CN211460473U (en) | 2019-05-29 | 2019-05-29 | Telescopic device |
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|---|---|
| CN211460473U true CN211460473U (en) | 2020-09-11 |
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| CN201920791700.5U Active CN211460473U (en) | 2019-05-29 | 2019-05-29 | Telescopic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112206047A (en) * | 2020-10-09 | 2021-01-12 | 厦门中科兴医疗器械有限公司 | Dynamic hip joint combined pressurization fixing system |
| CN112790849A (en) * | 2020-12-30 | 2021-05-14 | 南方医科大学 | Two-way pressurization limit for a distance slip screw of thighbone neck and screwdriver |
-
2019
- 2019-05-29 CN CN201920791700.5U patent/CN211460473U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112206047A (en) * | 2020-10-09 | 2021-01-12 | 厦门中科兴医疗器械有限公司 | Dynamic hip joint combined pressurization fixing system |
| CN112790849A (en) * | 2020-12-30 | 2021-05-14 | 南方医科大学 | Two-way pressurization limit for a distance slip screw of thighbone neck and screwdriver |
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