RU460U1 - Hammer drill - Google Patents

Abstract

A perforator containing a housing, guide elements for supplying and receiving a transplant, a block of circular knives, a block of matrices and a manual drive for rotating knives and matrices, characterized in that the knife block, a block of matrices and a manual drive are installed in an additional housing rigidly fixed in the main body quick-detachable, for example screw connection.

Description

PUNCHER

The popular model refers to medicine, and more specifically to surgical instruments for perforation of skin grafts.

Various designs of surgical instruments for perforation of skin grafts used for transplantation during the treatment of burns, etc. dermal more beneficial.

Known, for example, perforators according to.with. USSR N 1697768 and N 1706585, MKI А61В 17/322 for receiving mesh transplants from dermatome flaps containing the BODY, made in the form of a plate, with lenn1; 1 in it (a block of perforating knives and a block of TURNING matrices pivotally connected to the plate. A perforated skin flap is placed on knives and pressed with a die.

Such perforators, although they allow the manufacture of mesh transplants from skin grafts, however, they have a number of significant drawbacks. First of all, the punchers of these structures have low reliability due to aa FAST blunting of the cutting edges of knives. In addition, such drills are quite dangerous to handle because of the possibility of cuts in the hands of people working with them.

Also known as a perforator. N 1532005, MKI А61В 17/322, 1988, comprising a case with a block of perforating knives made in the form of a roller and a block of dies made in the form of a roller, and the rollers have grooves and cutting edges, a manual drive for rotating knives and dies , as well as a device for removing the graft from knives, made in the form of a comb.

This punch allows you to get perforated skin flaps, but it is very inconvenient to work, because when you fill the skin flap to process it, you HAVE to keep it on weight, and

MKI A61V 17/322

P03 f

after the end of the punching, this flap HAS to stick out from under the punch, which is also unsatisfying.

IzEvsten also a puncher on.with. N 1706586, MKI А61В 17/322., 1989, comprising a case with a set of disk knives installed in it, a Christmas tree of matrices B of a Bidet of matrix rings, a DRIVE for moving knives and matrices with SUPPORT CLIPPERS to regulate the gap between knives and matrices and to regulate the effort of pressing the knives to matrices. This perforator, although it allows you to perforate the skin grafts, however, it is quite difficult to manufacture and inconvenient to use, since it has no guides for both the delivery of the graft and its removal.

Closest to the claimed solution is the well-known structural design of the hammer drill.with. USSR N 1722477, MKI A61B 17/322, 1990. This perforator contains a HOUSING, guiding elements for feeding and receiving a transplant made in the form of plates, a block of perforating knives, and performing punch punches

disk SHAPES with cutouts, sideways. matrices made in the form of matrix rings, a manual DRIVE for rotation of the perforator, Yozhi and matrices.

This puncher allows you to get perforated flaps. SKIN, however, it is inconvenient to work because of, D) ((% .- 5I 1n “uy.

perforated graft with punches. In addition, the scope of use of such a punch is limited due to the lack of the ability to replace a permanently installed set of knives and dies with another with other necessary parameters, and also because of the inconvenience of working with left-handed people. Moreover, this structural design of the perforator causes inconvenience in the maintenance of such a perforator for medical personnel if it is necessary to disinfect the working bodies of the perforator, since it must be washed and

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to clean as a whole, moreover, it is extremely difficult to separate its elements.

The problem WHICH the claimed utility model is directed to is to increase the usability of the puncher and expand the scope of its use by facilitating the process of disinfection of the working bodies of the puncher and ensuring the convenience of working on the puncher for people who have different right and left hands, as well as by replacing blocks of knives and matrices of perforated skin flaps with specified parameters.

The implementation of this utility model allows to obtain a technical result, which consists in increasing the accuracy of perforation, i.e. the possibility of manufacturing a graft with the most optimal parameters specified, providing the maximum coefficient of overlap of the affected area of the body with the minimum possible skin consumption (the minimum possible size of the skin graft), sa account Providing the ability to quickly replace knife blocks and dies with different required parameters of the length of the notches, lengths of jumpers, and step between cuts.

The specified result is achieved by the fact that in the known perforator containing the HOUSING, the guiding elements for supplying and receiving the transplant, the FIR-tree of disc notes, the block of matrices and the manual DRIVE for rotating knives and matrices, the block of knives, the matrix block and the manual DRIVE are installed in an additional case, rigid fixed in the main body by a quick-detachable, for example, screw connection.

The proposed utility model is illustrated by drawings, in which: in FIG. 1 shows a longitudinal section of a perforator; in FIG. 2 shows a transverse raerez perforator AA-5

in FIG. 3 shows on an enlarged scale knives punches,

matrices and gaskets; in FIG. 4 perforated graft after

processing by cutting tools

with parameters t, 1 and n;

in FIG. 5 shows a perforated graft after

Punching cutting tools

with parameters t, 1 and p.

The boehmung ability of the claimed utility model is confirmed by the following materials.

The proposed perforator contains the main HOUSING 1 with guide plates 2 and 3, a removable cutting unit 4 and a manual DRIVE for rotating the working bodies of the perforator with a handle 5. The cutting unit 4 includes rollers 6 and 7, kinematically connected to each other by gear 8. Rollers 6 and 7 are installed with the possibility of rotation in the strips 9, which with the help of the strips 10 form the rigid structure of the additional housing installed in the main body 1. On the roller 6 are matrix rings 11, between which the output rings 12 are installed, INSIDE THE CAT ORY, in turn, are the spacer rings 13. The roller 6 with rings 11,12 and 13 form a block of matrices

punch. The thickness of the spacer rings 13 is greater than the thickness of the output rings 12, which allows the output rings 12 to float between the matrix rings 11. This mutual movement of the rings allows you to freely remove the otter (pieces of skin remaining after the cuts) from the gaps between the matrix rings 11. The knife block consists of knives mounted on a roller 7 circular knives-punches 14 with cuts 15. Between the knives-punches 14 there are intermediate rings 16, the thickness of which is equal to the thickness of the matrix rings 11. The adjacent knives-punches 14 reamers 1 1 1 2 2 2

chucks in relation to FRIEND to each other by a certain angle, for example, by half the angle between the cuts 15. The lance 11, 12 and 13 on the roller 6, as well as knives-punches 14 with rings 16 on the roller 7 are tightened with nuts 17. Additional body 9 , 10 with a cutting unit 4 installed in it and a manual ACTUATOR with a handle 5 fixed in the main body 1 with screws 18.

The proposed hammer drill operates as follows oEpasoM.

The skin graft 19 is placed on the guide plate 2 and moved until it contacts the knife punches 14. By rotating the handle 5, the knives 14 and matrix rings 11 are rotated so that the skin graft 19 is pulled into the cutting zone, where, using the knife punches 14 and matrix rings 11 on the transplant 19 are cut rectangular cuts. The length of the cuts 1 is determined by the length of the arc of the working surface of the punches 14 between the cuts 15. The length of the jumpers n between the cuts is determined by the WIDTH of the cuts 15 on the knives 14. The step between the cuts t is determined by the thickness of the rings 11 and 16. Each interchangeable cutting unit 4 has its own parameters lengths of cutting EDGE and their steps. Since the adjacent knife-pointcoHfct 14 are rotated relative to each other, therefore, the notches on the graft are staggered, and the offset of the SERIES of notches relative to each other depends on the angle of rotation of the knives-punches 14 between them. After passing through the cutting zone, the perforated graft enters the receiving guide plate 3, the front part of which is made in the form of a greyenka 20, the smell of which is included in the gap between the knife punches 14. The greyenka 20 removes the perforated graft 19 from the knife punches 14. Before the final use, the perforated graft 19 stretch in the transverse direction to a certain necessary WIDTH.

The proposed original structural design of the punch by introducing additional elements into its design allows

1. To ensure reliable operation of the perforator due to the high durability of its cutting tools.

2. To ensure low cost of production of perforators due to the relative SIMPLICITY of the design of its elements.

3. Ensure ease of use by facilitating access for maintenance personnel to the working bodies of the drill during its disinfection.

4. Ensure ease of use by providing the ability to rearrange the hand drive handle for different people who have different rights with their right or left hand.

5. Significantly expand the area of use of perforators by making it possible to manufacture transplants with predetermined perforation parameters for specific application conditions for each specific operation.

AUTHORS:. V.V. Kremnev

, --- / bh .. ,,, - V. A. Sashenkov

(

G.A. Vasin

Claims (1)

A perforator containing a housing, guide elements for supplying and receiving a transplant, a block of circular knives, a block of matrices and a manual drive for rotating knives and matrices, characterized in that the knife block, a block of matrices and a manual drive are installed in an additional housing rigidly fixed in the main body quick-detachable, for example screw connection.