CN219846736U - Medical metal bone screw convenient to demolish - Google Patents

Abstract

The utility model discloses a medical metal bone screw convenient to dismantle, which comprises a screw barrel, wherein the top end of the screw barrel is fixedly connected with a gasket, the inner wall of the gasket is penetrated with a rotating rod, the top end of the rotating rod is fixedly connected with a nut, the top end of the nut is provided with a cross opening, and the outer wall of the rotating rod is provided with lifting threads.

Description

Medical metal bone screw convenient to demolish

Technical Field

The utility model relates to the technical field of bone screws, in particular to a medical metal bone screw convenient to detach.

Background

In the fracture operation, when a fracture patient is treated, a fracture part is usually fixed by a fixing plate and a bone screw, a Kirschner wire is driven in through a guider when the fracture is made, then the Kirschner wire is sleeved on the bone screw to be screwed into the fracture part for tensioning and positioning, the steel screw is also required to be taken out to be connected with the bone of the human body after being implanted into the human body for a period of time, and the screw is usually taken out by rotating at the end part of the bone screw by using a screwdriver, so that the screw thread action of the bone screw moves outwards.

However, when the existing medical metal bone screw is used, the condition that the inner side of the bone screw is tightly connected with bones and the outer side of the bone screw rotates along with a screwdriver to cause fracture of the bone screw often occurs, and the bone screw is inconvenient to dismantle and causes secondary injury of the bones.

Accordingly, in view of the above, the present utility model provides a medical metal bone screw which is convenient to disassemble and is researched and improved against the defects of the existing structure.

Disclosure of Invention

The utility model aims to provide a medical metal bone screw convenient to disassemble, so as to solve the problem that the bone screw proposed in the background art is inconvenient to disassemble.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a medical metal coaptation screw convenient to demolish, includes a nail section of thick bamboo, the top fixedly connected with gasket of nail section of thick bamboo, the inner wall of gasket runs through there is the rotary rod, the top fixedly connected with nut of rotary rod, the cross mouth has been seted up on the top of nut, the outer wall of rotary rod is provided with the lift screw thread, the outer wall threaded connection of lift screw thread has the lift post with nail section of thick bamboo inner wall sliding connection, the bottom fixedly connected with connecting block of lift post, spacing spout has been seted up to the bottom of connecting block, the outer wall sliding connection of spacing spout has flexible slider, the outer wall fixedly connected with and spacing spout outer wall sliding connection's sliding strip of flexible slider, the one end fixedly connected with connecting plate of flexible slider, the outer wall fixedly connected with of connecting plate and nail section of thick bamboo outer wall sliding connection's fastening screw thread.

Preferably, the central axis of the rotary rod coincides with the central axis of the nail cylinder.

Preferably, the outer wall of the nut is in an inverted table shape.

Preferably, the lifting column forms a lifting structure with the nail cylinder through the rotary rod and the lifting screw thread.

Preferably, the limiting sliding grooves are provided with four groups, and the four groups of the limiting sliding grooves are circumferentially distributed at equal angles relative to the connecting block.

Preferably, the connecting plate forms a telescopic structure with the nail barrel through the limiting chute and the sliding strip.

Preferably, the external shape of the fastening thread is spiral.

Compared with the prior art, the utility model has the beneficial effects that:

according to the screw nail, the limiting sliding grooves and the telescopic sliding blocks are arranged, the rotating rods rotate to drive the lifting columns to slide along the inner wall of the screw nail cylinder through the lifting threads, the lifting columns slide to drive the connecting blocks to slide, the connecting blocks slide to drive the four groups of limiting sliding grooves to synchronously move, so that the limiting sliding grooves slide through the sliding strips to drive the telescopic sliding blocks to slide along the outer wall of the screw nail cylinder, the telescopic sliding blocks slide to drive the fastening threads on the outer wall of the connecting plates to stretch along the outer wall of the screw nail cylinder, the fastening threads are separated from bones, and secondary injury of the bones is avoided when the screws are disassembled.

Drawings

FIG. 1 is a schematic view of the overall construction of a medical metal bone screw of the present utility model which is convenient to remove;

FIG. 2 is a schematic overall cross-sectional view of a medical metal bone screw of the present utility model for ease of removal;

FIG. 3 is a schematic cross-sectional view of a connection block of a medical metal bone screw of the present utility model for easy removal;

fig. 4 is a schematic view of a fastening thread contraction structure of a medical metal bone screw according to the present utility model, which is convenient to remove.

In the figure: 1. a nail barrel; 2. a gasket; 3. a rotating rod; 4. a screw cap; 5. a cross port; 6. lifting threads; 7. lifting columns; 8. a connecting block; 9. limiting sliding grooves; 10. a telescopic slide block; 11. a sliding bar; 12. a connecting plate; 13. and (5) fastening the screw thread.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-4, a medical metal bone screw convenient to dismantle, including nail section of thick bamboo 1, the top fixedly connected with gasket 2 of nail section of thick bamboo 1, the inner wall of gasket 2 runs through and has rotary rod 3, the top fixedly connected with nut 4 of rotary rod 3, cross mouth 5 has been seted up on the top of nut 4, the outer wall of rotary rod 3 is provided with lift screw thread 6, lift screw thread 6's outer wall threaded connection has lift post 7 with nail section of thick bamboo 1 inner wall sliding connection, lift post 7's bottom fixedly connected with connecting block 8, spacing spout 9 has been seted up to connecting block 8's bottom, spacing spout 9's outer wall sliding connection has flexible slider 10, flexible slider 10's outer wall fixedly connected with and spacing spout 9 outer wall sliding connection's slider 11, flexible slider 10's one end fixedly connected with connecting plate 12, connecting plate 12's outer wall fixedly connected with and nail section of thick bamboo 1 outer wall sliding connection's fastening screw thread 13.

Further, the axis of rotary rod 3 coincides with the axis of nail section of thick bamboo 1, and during operation is favorable to nut 4 rotation to drive rotary rod 3 rotation, realizes the steady pivoted control operation of rotary rod 3.

Further, the outer wall of the nut 4 is in an inverted table shape, and when the bone fracture plate is in operation, the control operation of stable lamination of the nut 4 and the bone fracture plate is facilitated by arranging the inverted table-shaped nut 4.

Further, the lifting column 7 forms a lifting structure with the nail barrel 1 through the rotary rod 3 and the lifting thread 6, and when the nail barrel is in operation, the rotary rod 3 is beneficial to rotate and drives the lifting column 7 to slide along the inner wall of the nail barrel 1 through the lifting thread 6, so that the sliding control operation of the lifting column 7 is realized.

Further, the limit sliding grooves 9 are provided with four groups, the position relation of the four groups of limit sliding grooves 9 is distributed circumferentially at equal angles with respect to the connecting block 8, and during operation, the four groups of limit sliding grooves 9 are arranged, so that the connecting block 8 can slide to drive the four groups of limit sliding grooves 9 to synchronously move, and the control operation of the four groups of limit sliding grooves 9 to synchronously move is realized.

Further, the connecting plate 12 forms a telescopic structure with the nail barrel 1 through the limiting sliding groove 9 and the sliding strip 11, and when the nail barrel is in operation, the limiting sliding groove 9 slides to drive the telescopic sliding block 10 to slide along the outer wall of the nail barrel 1 through the sliding strip 11, and the telescopic sliding block 10 slides to drive the connecting plate 12 to synchronously slide, so that the sliding control operation of the connecting plate 12 is realized.

Further, the fastening thread 13 is spiral in shape, and when in operation, the screw cap 4 rotates to drive the fastening thread 13 on the outer wall of the nail barrel 1 to rotate, and the bone fracture plate is spliced with the bone through the nail barrel 1.

Working principle: when the medical metal bone screw convenient to dismantle is used, firstly, medical staff punches holes at bones of patients, after the punching is finished, the screw barrel 1 is placed into the holes, then, the screw cap 4 is rotated through the cross port 5, the screw cap 4 is rotated to drive the fastening screw threads 13 on the outer wall of the screw barrel 1 to rotate, and the bone plate is spliced with bones through the screw barrel 1.

Then, after the bone growth is finished, the operation is dismantled to butt joint bone plate and skeleton, medical staff reversely rotates nut 4, nut 4 rotates and drives rotary rod 3 to rotate, rotary rod 3 rotates and drives lifting column 7 through lifting screw thread 6 and slide along the inner wall of nail section of thick bamboo 1, lifting column 7 slides and drives connecting block 8 and slide, connecting block 8 slides and drives four sets of spacing spouts 9 synchronous motion, so that spacing spout 9 slides and drives flexible slider 10 through slider 11 and slide along the outer wall of nail section of thick bamboo 1, flexible slider 10 slides and drives the fastening screw thread 13 of connecting plate 12 outer wall and stretch out and draw back along the outer wall of nail section of thick bamboo 1, so that fastening screw thread 13 separates with the skeleton, then, medical staff pulls out nail section of thick bamboo 1, avoid the secondary injury of skeleton, this is the theory of operation of this kind of medical metal bone screw convenient to dismantle.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (7)

1. Medical metal bone screw convenient to demolish, including nail section of thick bamboo (1), its characterized in that: the utility model discloses a nail barrel, including nail barrel (1), screw rod (3), rotary rod (3) are run through to the inner wall of nail barrel (1), top fixedly connected with nut (4) of rotary rod (3), cross mouth (5) have been seted up on the top of nut (4), the outer wall of rotary rod (3) is provided with lift screw thread (6), the outer wall threaded connection of lift screw thread (6) has lift post (7) with nail barrel (1) inner wall sliding connection, the bottom fixedly connected with connecting block (8) of lift post (7), spacing spout (9) have been seted up to the bottom of connecting block (8), the outer wall sliding connection of spacing spout (9) has flexible slider (10), the outer wall fixedly connected with and spacing spout (9) outer wall sliding connection's slider (11), the one end fixedly connected with connecting plate (12) of flexible slider (10), the outer wall fixedly connected with and nail barrel (1) outer wall sliding connection's fastening screw thread (13).

2. The easy-to-remove medical metal bone screw according to claim 1, wherein: the central axis of the rotary rod (3) coincides with the central axis of the nail cylinder (1).

3. The easy-to-remove medical metal bone screw according to claim 1, wherein: the outer wall of the nut (4) is in an inverted table shape.

4. The easy-to-remove medical metal bone screw according to claim 1, wherein: the lifting column (7) forms a lifting structure with the nail barrel (1) through the rotary rod (3) and the lifting screw thread (6).

5. The easy-to-remove medical metal bone screw according to claim 1, wherein: the limiting sliding grooves (9) are arranged in four groups, and the four groups of the limiting sliding grooves (9) are circumferentially distributed at equal angles relative to the connecting block (8).

6. The easy-to-remove medical metal bone screw according to claim 1, wherein: the connecting plate (12) forms a telescopic structure with the nail barrel (1) through the limiting chute (9) and the sliding strip (11).

7. The easy-to-remove medical metal bone screw according to claim 1, wherein: the external shape of the fastening thread (13) is spiral.