Locking screw pressurizing screwdriver tool and screw

Abstract

The utility model discloses a locking screw pressurizing screwdriver tool and a screw, the screw is matched with the pressurizing screwdriver tool, the locking screw pressurizing screwdriver tool belongs to the technical field of medical instruments, the locking screw pressurizing screwdriver tool comprises a screwdriver main body and a sleeve, the screwdriver main body is hollow to form a rotating cavity, and a connector is formed at the front end of the screwdriver main body; a threaded section, a sliding section and a handle section are sequentially arranged in the axial direction from front to back, the sliding section is sleeved with a sliding sleeve only capable of sliding in the axial direction, the front end of the anchoring rod in the rotating cavity extends out of the connector and is provided with external threads, and the rear end extends out of the handle section and is provided with a rotating handle; the sleeve is provided with a limiting part matched with the sliding sleeve, the sleeve and the screwdriver body can be locked when the sliding sleeve slides into the limiting part, the sleeve is further provided with a cylindrical connecting part, inner threads of the inner wall of the cylindrical connecting part are matched with outer threads of the threaded section of the screwdriver body, and the end of the screw is matched with the anchoring rod and the connector and can be anchored to the working end of the anchoring rod. And the pressurizing and locking operations of the screw are completed through overall adaptation.

Description

Technical Field

[0001] This utility model belongs to the field of surgical instrument technology, and in particular relates to a locking screw pressurizing screwdriver tool and screw. Background Technology

[0002] Fracture plate fixation surgery is a common treatment for fractures, aiming to help restore stability and function at the fracture site through external support. Under direct vision, the fracture ends are reduced to a satisfactory position, and then fixed with a bone holder to ensure accurate alignment of the fracture site. A suitably sized plate is placed, holes are drilled, and screws are screwed in for fixation.

[0003] In surgical procedures, the lag screw should be inserted as perpendicularly as possible to the fracture line. In order to maintain the stability of the lag screw, several locking screws need to be added at appropriate positions such as laterally to reduce or avoid circumferential rotation of the lag screw and maintain the stability of the bone plate. In addition, when the lag screw is continuously pressurized, the bone plate is prone to relative displacement because the locking screws have not been added, which affects the progress of the operation. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a locking screw pressurizing screwdriver tool and screw.

[0005] The technical solution adopted by this utility model is as follows: a screwdriver tool for locking screws and pressurizing, including a screwdriver body and a sleeve on the outside of the screwdriver body;

[0006] The screwdriver body has a hollow interior forming a rotating cavity; a connector is formed at the front end for attaching the screw end; a threaded section, a sliding section, and a handle section of predetermined length are formed sequentially from front to back along its axial direction; the sliding section is fitted with a sliding sleeve, and the sliding sleeve is configured to slide only axially with the sliding section; an anchor rod is rotatably arranged inside the rotating cavity, the front end of the anchor rod extends out of the connector and is configured with an external thread, and the rear end extends out of the handle section and is configured with a rotating handle;

[0007] The sleeve includes a limiting part that matches the sliding sleeve, which locks the sleeve and the screwdriver body when the sliding sleeve slides into the limiting part; and a connecting part that can be configured in the threaded section of the screwdriver body, which is a cylindrical structure with an internal thread on the inner wall that matches the external thread of the threaded section.

[0008] Furthermore, the limiting portion of the sleeve has a predetermined length, and the sliding sleeve has a predetermined length and a limiting ring is provided at the end near the handle of the screwdriver body. The limiting ring is positioned outside the limiting portion when the sliding sleeve slides into the limiting portion.

[0009] Furthermore, the inner wall of the limiting part has a polyhedral cross-section, the outer side of the sliding sleeve matches the inner side of the limiting part, and the sliding sleeve is configured to slide only axially with the limiting part.

[0010] This utility model also proposes a screw that matches the above-mentioned screwdriver tooling, the end of which matches the anchor rod and connector of the above-mentioned screwdriver body, and can be anchored to the working end of the anchor rod.

[0011] Furthermore, the end of the screw is provided with an insertion groove and a positioning groove connected in sequence from the outside to the inside along the axial direction. The insertion groove matches the connector of the screwdriver body, and the positioning groove is adapted to the thread at the front end of the anchor rod.

[0012] Furthermore, the screw includes a tip portion configured with a self-tapping thread; a threaded portion connected to the tip portion configured with an external thread; a shank portion connected to the threaded portion; and an end portion connected to the shank portion, the end portion being configured with an external thread that matches the locking hole of the bone plate.

[0013] The beneficial effects of this utility model after adopting the above structure are as follows: This utility model proposes a screw-locking screw-pressing screwdriver fixture and screw. Through the nested locking between the sleeve and the screwdriver body, the sleeve can be pressed against the bone plate to press the screw. Even after releasing the lock between the sleeve and the screwdriver body, continuous pressure can be maintained due to the threaded connection between the threaded section of the screwdriver body and the threaded portion of the sleeve. After pressing is completed, keeping the sleeve stationary and rotating the screwdriver body allows the screw to be screwed into the locking hole of the bone plate, thus locking the screw. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] Figure 1 This is a schematic diagram of the main structure of a screwdriver for a locking screw pressurizing screwdriver tool proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the sleeve structure of a locking screw pressurizing screwdriver tool proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the screw structure of a locking screw pressurizing screwdriver tool proposed in this utility model;

[0018] Figure 4 This is a cross-sectional view of the screw end of a locking screw pressurizing screwdriver tool proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the screwdriver body and the sleeve nested in a screwdriver locking screw pressurization tool proposed in this utility model.

[0020] In the attached drawings: 1. Connector, 2. Threaded section, 3. Sliding section, 4. Handle section, 5. Sliding sleeve, 6. Anchor rod, 7. Rotating handle, 8. Limiting part, 9. Connecting part, 10. Limiting ring, 11. Insertion groove, 12. Positioning groove, 13. Tip, 14. Threaded part, 15. Screw part, 16. End, 17. Rotating cavity. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] like Figures 1-5 As shown, this application proposes a screw-locking screwdriver tool and a screw that matches the screwdriver tool;

[0024] In the first aspect, this application proposes a screw-pressurizing screwdriver tooling, comprising a screwdriver body and a sleeve on the outside of the screwdriver body. The screwdriver body and the screwdriver sleeve are nested and locked and unlocked by a sliding sleeve 5, which facilitates the pressurization of the corresponding screw, the maintenance of pressurization, and the locking of the screw to the bone plate. The bone plate of this application is a bone plate with a locking hole that matches the end 16 of the screw, which facilitates the locking of the screw position.

[0025] Specifically, the screwdriver body has a hollow interior forming a rotating cavity 17; a connector 1 is formed at the front end for attaching a screw end 16; a threaded section 2, a sliding section 3, and a handle section 4 of predetermined length are formed sequentially from front to back along its axial direction. The sliding section 3 is fitted with a sliding sleeve 5, and the sliding sleeve 5 is configured to slide only axially with the sliding section 3; an anchor rod 6 is rotatably configured (it can be rotatably configured through structural components such as bearings, which is existing technology and will not be described in detail here) inside the rotating cavity 17. The front end of the anchor rod 6 extends out of the connector 1 and is configured with an external thread, and the rear end extends out of the handle section 4 and is configured with a rotating handle 7; based on the above structure, in this embodiment, it is preferred that the cross-section of the sliding section 3 of the screwdriver body can be square, the sliding chamber inside the sliding sleeve 5 is open at both ends and matches the sliding section 3 of the screwdriver body, and the sliding sleeve 5 and the sliding section 3 have corresponding sliding damping.

[0026] Furthermore, the sleeve includes a limiting part 8 that matches the sliding sleeve 5. When the sliding sleeve 5 slides into the limiting part 8, it engages and locks the sleeve and the screwdriver body. The inner wall of the limiting part 8 has a polyhedral cross-section. The outer side of the sliding sleeve 5 matches the inner side of the limiting part 8. The sliding sleeve 5 is configured to slide only axially with the limiting part 8. Based on the above preferred embodiment, the cross-section of the sliding sleeve 5 is square, and the cross-section of the limiting part 8 of the sleeve is a matching square, allowing the sliding sleeve 5 to slide into the limiting part 8 in a fixed direction (axial direction) and restricting the circumferential rotation of both. There is corresponding sliding damping between the sliding sleeve 5 and the limiting part 8. The limiting part 8 of the sleeve has a predetermined length. The sliding sleeve 5 has a predetermined length and a limiting ring 10 is provided at the end near the handle of the screwdriver body. The limiting ring 10 blocks the outside of the limiting part 8 when the sliding sleeve 5 slides into the limiting part 8, positioning the sleeve's sliding insertion position and preventing the sleeve from completely entering the limiting part 8, which would make it difficult to release the nesting lock.

[0027] In addition, the sleeve also includes a connecting part 9 with a cylindrical structure. The inner wall is formed with an internal thread that matches the external thread of the threaded section 2. It can be configured on the threaded section 2 of the screwdriver body. The threaded section 2 strengthens the locking between the sleeve and the screwdriver body. After the pressure is applied, the screw can still maintain the pressure effect after the nesting lock between the sliding sleeve 5 and the sleeve is released.

[0028] Based on the above embodiments, this application also proposes a screw that matches the aforementioned screwdriver tooling. Its end 16 matches the anchor rod 6 and connector 1 of the screwdriver body, and can be anchored to the working end of the anchor rod 6. Specifically, the end 16 of the screw is provided with a connected insertion groove 11 and a positioning groove 12 sequentially from the outside to the inside along the axial direction. The insertion groove 11 matches the connector 1 of the screwdriver body, and the positioning groove 12 is threaded to the front end of the anchor rod 6. In some preferred embodiments, the screw includes a tip 1613 with a self-tapping thread; a threaded portion 14 connected to the tip 1613 with an external thread; a screw portion 15 connected to the threaded portion 14; and the end 16 connected to the screw portion 15, wherein the end 16 is configured with an external thread that matches the locking hole of the bone plate. The screw tip 1613 and threaded portion 14 can be screwed into the locking hole of the bone plate through the screwdriver tool in the nested locking state of the screwdriver body and the sleeve. After the tip 1613 and threaded portion 14 pass through the fracture line and enter the end face away from the bone plate, the sleeve can first contact the bone plate. At this time, the screwdriver device can be rotated to apply pressure (at this time, it is the action of the tension screw) and bring the distal end face closer to the steel plate.

[0029] In practical use, the sliding section 3, sliding sleeve 5, and limiting part 8 of the screwdriver body are all square, and can be completely fitted together like a nesting doll. When using, place the end 16 of the screw at the connector 1 of the screwdriver body, rotate the anchor rod 6, and the front end of the anchor rod 6 extends into the positioning groove 12 of the screw end 16 and is threadedly matched with the positioning groove 12. The connector 1 of the screwdriver tool gradually enters the insertion groove 11 of the screw end 16. During the rotation of the anchor rod 6, the anchoring of the screwdriver body and the screw is completed. Rotate the screwdriver body so that its connector 1 is in a suitable position inside the sleeve, preferably so that the end 16 of the screw does not protrude outside the sleeve.

[0030] Then, the sliding sleeve 5 of the sliding body enters the limiting part 8 of the sleeve, so that the sleeve and the screwdriver body are engaged. In this state, the sleeve and the screwdriver body can rotate synchronously. When the screw is screwed in through the locking hole of the bone plate, the screwdriver tool is rotated. After the tip 1613 and the threaded part 14 of the screw pass through the fracture line and enter, the sleeve first contacts the bone plate because the end 16 of the screw is located inside the sleeve. At this time, when the screwdriver tool is rotated, pressure can be gradually applied (at this time, it is the function of a normal screw). After the pressure is applied, the sliding sleeve 5 is slid out to release the engagement between the screwdriver body and the sleeve. After the engagement is released, the connecting part 9 of the screwdriver body is threadedly connected to the threaded section 2 of the sleeve, so it can still maintain continuous pressure. Then, the sleeve is fixed by hand, and the screwdriver body is rotated to screw in the screw. The sleeve is kept stationary, and the end 16 of the screw gradually enters the locking hole of the bone plate to complete the locking of the screw. Then, the anchor rod 6 is rotated in the opposite direction to release the riveting between the screwdriver body and the screw, thus completing the pressure and locking of the screw.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents. In summary, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention. Each component of this application can be driven by a corresponding external motor; this is prior art and will not be elaborated upon here.

Claims

1. A screwdriver tool for locking screws, characterized in that: include The screwdriver body has a hollow interior forming a rotating cavity; a connector is formed at the front end for attaching a screw end; a threaded section, a sliding section, and a handle section of predetermined length are formed sequentially from front to back along its axial direction; the sliding section is fitted with a sliding sleeve, and the sliding sleeve is configured to slide only axially with the sliding section; an anchor rod is rotatably arranged inside the rotating cavity, the front end of the anchor rod extends out of the connector and is provided with an external thread, and the rear end extends out of the handle section and is provided with a rotating handle; The sleeve includes a limiting part that matches the sliding sleeve, which locks the sleeve and the screwdriver body when the sliding sleeve slides into the limiting part; the connecting part is disposed on the threaded section of the screwdriver body, and has a cylindrical structure with an internal thread on the inner wall that matches the external thread of the threaded section.

2. The locking screw pressurizing screwdriver tool according to claim 1, characterized in that: The limiting part of the sleeve has a predetermined length, and the sliding sleeve has a predetermined length and a limiting ring is provided at the end near the handle of the screwdriver body. The limiting ring is positioned outside the limiting part when the sliding sleeve slides into the limiting part.

3. The locking screw pressurizing screwdriver tool according to claim 1, characterized in that: The inner wall of the limiting part has a polyhedral cross-section, the outer side of the sliding sleeve matches the inner side of the limiting part, and the sliding sleeve is configured to slide only axially with the limiting part.

4. A screw, characterized in that, It has a predetermined length, and its end matches the anchor rod and connector of the screwdriver body as described in claim 1, and can be anchored to the working end of the anchor rod.

5. A screw according to claim 4, characterized in that: The end of the screw is provided with an insertion groove and a positioning groove connected in sequence from the outside to the inside along the axial direction. The insertion groove matches the connector of the screwdriver body, and the positioning groove is adapted to the thread at the front end of the anchor rod.

6. A screw according to claim 4, characterized in that: The screw includes a tip portion having a self-tapping thread; a threaded portion connected to the tip portion having an external thread; a shank portion connected to the threaded portion; and an end portion connected to the shank portion, the end portion having an external thread that matches the locking hole of the bone plate.

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