Locking metal bone plate

Abstract

The present application relates to a locking metal bone plate, comprising: a bone plate and fixing members. Multiple groups of fixing holes are provided on the bone plate, and each group of fixing holes includes two circular insertion holes tangent to each other at the edges. Multiple groups of fixing members are provided and correspond one-to-one to the multiple groups of fixing holes. Each group of fixing members includes two fixing screws. One ends of the two fixing screws are screwed into the two circular insertion holes in a one-to-one correspondence and are screwed into the bone, and the other ends are in contact with each other. A locking member is provided inside one of the fixing screws, and an annular groove capable of engaging with the locking member is provided outside the other fixing screw. The two fixing screws inside each group of fixing members can be used to fix the bone plate. At the same time, when the two fixing screws are fixed on the bone plate, they can drive the locking member to act, so that by using the thread screwing operation of one of the fixing screws, the other fixing screw is locked, thereby realizing further interlocking and improving the stability when the two fixing screws fix the bone plate on the bone.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a locking metal bone plate. Background Art

[0002] Standard plate technology is a surgical method that involves cutting the skin and soft tissue at the fracture site and fixing a metal plate (called a plate) on both sides of the fracture. The function of the plate is to maintain the stability of the fracture ends and promote fracture healing. This method is suitable for complex or unstable fractures, such as open fractures, articular fractures, etc.

[0003] Internal fixation is a non-surgical method that fixes the fracture ends together by inserting metal nails, screws or plates into the fracture site. Internal fixation can be divided into two types: external fixation and internal fixation. External fixation is to fix the fracture ends by installing a metal bracket on the skin surface. It is suitable for patients with severe soft tissue injuries or infections. Internal fixation is to insert metal instruments directly into the bone marrow cavity or muscle to achieve the purpose of fixing the fracture.

[0004] Existing bone plates can also be inserted with metal nails or screws so that they can be fixed to cope with different types of fractures. When the bone plates are fixed on both sides of the fracture site, there is still a safety hazard of unstable fixation and easy loosening. Summary of the invention

[0005] The present application provides a locking metal bone plate, which can solve the problem that the existing metal bone plates are poor in stability when fixed on both sides of the fracture site and have the potential safety hazard of loosening.

[0006] The technical solution of the present application is as follows: A locking metal bone plate comprises:

[0007] A bone fracture plate, wherein the bone fracture plate is provided with a plurality of groups of fixing holes, each group of the fixing holes comprising two circular sockets with tangent edges;

[0008] A fixing piece, wherein the fixing piece is provided with multiple groups and corresponds one-to-one with the multiple groups of fixing holes, each group of the fixing piece comprises two fixing screws, one end of the two fixing screws is spirally connected to the two circular sockets one-to-one and screwed into the bone, and the other ends are in conflict with each other, one of the fixing screws is provided with a locking piece inside, and the other fixing screw is provided with an annular groove that can be engaged with the locking piece outside, and the two fixing screws fix the bone plate on the bone, and the two fixing screws are interlocked through the engagement between the locking piece and the annular groove.

[0009] By adopting the above scheme, by setting multiple groups of fixing parts and arranging paired fixing screws on each group of fixing parts, when fixing the bone plate on the bone, the two fixing screws inside each group of fixing parts can be used to fix the bone plate. At the same time, when the two fixing screws are fixed on the bone plate, they can drive the locking part to act, so that by using the threaded engagement of one of the fixing screws, the other fixing screw can be locked, thereby realizing further interlocking and improving the stability when the two fixing screws fix the bone plate on the bone.

[0010] In one embodiment of the present application, the circular jack includes:

[0011] A columnar through-hole, which is arranged on the surface of the bone plate;

[0012] A first threaded hole, which is coaxially arranged outside the columnar through-hole and communicates with the columnar through-hole;

[0013] A second threaded hole, which is coaxially arranged above the first threaded hole, the diameter of the second threaded hole is larger than that of the first threaded hole, and it communicates with the columnar through-hole.

[0014] In one embodiment of the present application, the fixing screw includes:

[0015] A screw part, one end of which penetrates through the columnar through-hole and is screwed into the bone;

[0016] A first stud, which is coaxially and fixedly assembled above the screw part and is threadedly connected with the first threaded hole;

[0017] A second stud, which is coaxially and fixedly assembled above the first stud and is threadedly connected with the second threaded hole.

[0018] By adopting the above scheme, by setting the first threaded hole and the second threaded hole, using the two stacked first threaded hole and second threaded hole, and respectively threadedly connecting the first stud and the second stud of the fixing screw with the first threaded hole and the second threaded hole, since the diameters of the first stud and the second stud are different, it can offset the stress to a certain extent when the fixing screw is threadedly connected inside the first threaded hole and the second threaded hole, and at the same time improve the stability when the fixing screw is fixed inside the circular jack.

[0019] In one embodiment of the present application, the locking part includes:

[0020] A threaded connection column, wherein the threaded connection column is coaxially arranged on the first stud of one of the fixing screws, wherein a threaded cavity is coaxially arranged inside the second stud of one of the fixing screws, and is threadedly connected to the threaded connection column through the threaded cavity, wherein a strip slide extending radially along the second stud is arranged inside the second stud, wherein the strip slide is arranged on the side of the threaded cavity, wherein a clamping strip is arranged inside the strip slide, wherein a hemispherical protrusion is coaxially arranged on the top of the threaded connection column, wherein an inclined surface matching the hemispherical protrusion is arranged on the lower surface of one end of the clamping strip close to the threaded cavity, and a matching inclined surface is arranged on the upper surface of the other end of the clamping strip to avoid spatial interference when the other end of the clamping strip is inserted into the annular clamping groove;

[0021] The annular groove is arranged on the other fixing screw and circumferentially arranged on the side of the second stud of the other fixing screw;

[0022] The distance h between the lower surface of the clip strip and the lower surface of the second stud and the thickness d of the threaded connection column satisfy: h <d。

[0023] By adopting the above scheme, after one of the fixed threads is locked in the circular socket, the second stud is screwed downward on the threaded connecting column through the second stud which is split from the first stud. At this time, during the downward movement of the second stud, the clamping strip continuously approaches the hemispherical protrusion, and the inclined surface of the lower surface of one end of the clamping strip and the hemispherical protrusion squeeze each other, and move the clamping strip toward another adjacent second stud until it is just engaged with the annular groove, thereby improving the stability of the fixing device when locking the bone plate. In addition, by limiting the distance between the lower surface of the clamping strip and the lower surface of the second stud and the thickness of the threaded connecting column, the clamping strip can contact the hemispherical protrusion before the second stud is screwed downward on the threaded connecting column to the end of the stroke, so as to ensure that the clamping strip can cooperate with the hemispherical protrusion and move to the right during the downward screwing of the second stud.

[0024] In one embodiment of the present application, a columnar slide extending radially along the second stud is provided inside, a supporting piece is provided inside the columnar slide, and an annular sealing ring arranged circumferentially along the hemispherical protrusion is provided on the upper surface of the second stud. When the second stud thread is screwed onto the threaded connecting column, the volume of the threaded cavity is compressed to drive the supporting piece to approach the second threaded hole and to come into contact with the inner wall of the second threaded hole.

[0025] By adopting the above scheme, the second stud is screwed on the threaded connecting column to drive the locking member to move. At the same time, an annular sealing ring is provided to compress the volume inside the threaded cavity while generating pressure on the supporting member, and drive one end of the supporting member to press against the inner wall of the second threaded hole, thereby further improving the clamping stability of the second stud when it is screwed inside the second threaded hole.

[0026] In one embodiment of the present application, the abutting member includes:

[0027] An abutting rod disposed inside the columnar slideway and extending along the length direction of the columnar slideway. One end of the abutting rod is fixedly connected with a moving block, and the moving block is slidably connected inside the columnar slideway;

[0028] A piston block fixedly assembled on the end face of the moving block close to the threaded connection column.

[0029] By adopting the above scheme, when the volume inside the compression threaded cavity is compressed, pressure is generated on the piston block through compressed air. The piston block moves inside the columnar cavity and drives the other end of the abutting rod to abut against the inner wall of the second threaded hole, and the reaction force can generate a lateral pressure on the second stud to improve the stability of the second stud during assembly.

[0030] In one embodiment of the present application, an annular cavity is provided below the first threaded hole inside the bone plate. A threaded piston cavity is coaxially opened inside the second stud and the first stud. A piston column is threadedly connected inside the threaded piston cavity. Clamping members are arranged on both sides of the top end of the screw part, and the clamping members can be pushed by the piston column and engaged with the annular cavity.

[0031] By adopting the above scheme, by arranging the threaded piston cavity, after two paired fixing screws are fixed on the bone plate, by rotating the piston column, the piston column can be screwed into the threaded piston cavity, thereby squeezing the air inside the threaded piston cavity and using the air pressure to push the clamping members, so that the clamping members are engaged with the annular cavity, and after the fixing screws are screwed into the circular jacks, the two fixing screws can be further interlocked to reduce the possibility of the fixing screws loosening.

[0032] In one embodiment of the present application, a piston member is arranged outside the piston column. The piston member includes a plurality of rubber sealing rings arranged at intervals along the piston column, and the diameter of the rubber sealing ring is larger than the diameter of the threaded piston cavity.

[0033] By adopting the above scheme, by sleeving the rubber sealing ring on the piston member, after the piston member is screwed into the threaded piston cavity, the rubber sealing ring is in interference fit with the threaded piston cavity, so that the piston member can be firmly fixed inside the threaded piston cavity while improving the sealing performance of the piston cavity.

[0034] In one embodiment of the present application, the clamping member includes:

[0035] A clamping block. Slideways are opened on both sides of the top end of the screw part, and the clamping block is slidably connected inside the slideways along the radial direction of the screw part.

[0036] By adopting the above solution, by providing the engaging blocks and slidably connecting the engaging blocks to the chutes on both sides of the top end of the screw part, when the piston rod moves downward along the threaded piston cavity, the space inside the threaded piston cavity can be compressed, thereby using air pressure to squeeze the engaging blocks towards the inside of the annular cavity, and by means of the engagement between the engaging blocks and the annular cavity, the interlocking between the two fixing screws is realized. When it is necessary to remove the fixing screws, the piston rod is rotated reversely until a negative pressure is formed inside the threaded piston cavity, and the negative pressure difference is used to drive the engaging blocks to retract into the screw part, so as to facilitate the subsequent removal of the fixing screws.

[0037] In one embodiment of the present application, the engaging member includes:

[0038] A fixing ring, circular holes are provided on both sides of the top end of the screw part, and the fixing ring is fixedly assembled inside the circular holes;

[0039] An elastic rubber pad, the elastic rubber pad is arranged on the inner wall of the fixing ring.

[0040] By adopting the above solution, when the piston cavity is screwed downward along the threaded piston cavity, the space inside the threaded piston cavity is compressed, thereby using air pressure to squeeze the elastic rubber pad, causing it to deform and protrude towards the annular cavity. The part where the elastic rubber pad protrudes and extends into the annular cavity is used to improve the stability when the two fixing screws are screwed into the circular insertion holes.

[0041] In summary, the present application includes at least one of the following beneficial technical effects: by providing two circular insertion holes and two fastening screws, and inserting the two fastening screws into the two circular insertion holes respectively, when the two fastening screws are screwed into the circular insertion holes and fasten the bone plate, a mutually squeezing force is formed between the two fastening screws, thereby increasing the lateral mutual acting force, making the locking between the fastening screw and the circular insertion hole tighter, and improving the fixing stability of the fastening screw.

[0042] By providing the first threaded hole, the second threaded hole, the first stud and the second stud, when the fastening screw is screwed into the circular insertion hole, the first stud and the second stud are respectively screwed into the first threaded hole and the second threaded hole, thereby further improving the fastening ability of the fastening screw while using the different diameters between the first stud and the second stud to offset part of the stress.

[0043] By providing the locking member, by means of the cooperation between the card strip and the hemispherical protrusion, when the second stud is screwed above the threaded connection column, the hemispherical protrusion can squeeze the card strip, and under the squeezing force, the card strip moves towards the annular slot of the other second stud and engages with it, thereby further improving the fixing stability between the fastening screw and the bone plate.

[0044] By setting the piston rod and making it move along the inside of the threaded piston cavity, the piston rod can squeeze the space inside the threaded piston cavity, thereby increasing the pressure inside the threaded piston cavity. The pressure acts on the engaging block, driving the engaging block to move into the annular cavity, achieving an improvement in the clamping tightness between the fastening screw and the bone plate. Similarly, an elastic rubber pad can be set. The pressure acts on the elastic rubber pad, causing it to deform and protrude into the annular cavity, thereby achieving the purpose of improving the clamping tightness between the fastening screw and the bone plate. Brief Description of the Drawings

[0045] Figure 1 is the front view of the locking metal bone plate provided by the first embodiment of the present application;

[0046] Figure 2 is the front elevation cross-sectional view of the locking screw of the locking metal bone plate provided by the first embodiment of the present application;

[0047] Figure 3 is the front elevation cross-sectional view of the circular socket of the locking metal bone plate provided by the first embodiment of the present application;

[0048] Figure 4 is the front elevation cross-sectional view of the locking metal bone plate when the latch strip is not inserted into the annular cavity provided by the first embodiment of the present application;

[0049] Figure 5 is the front elevation cross-sectional view of the locking metal bone plate when the latch strip is inserted into the annular cavity provided by the first embodiment of the present application;

[0050] Figure 6 is the front elevation cross-sectional view of the abutting member of the locking metal bone plate provided by the second embodiment of the present application;

[0051] Figure 7 is the front elevation cross-sectional view of the abutting rod of the locking metal bone plate provided by the second embodiment of the present application

[0052] Figure 8 is the front view of the piston rod of the locking metal bone plate provided by the third embodiment of the present application;

[0053] Figure 9 is the front elevation cross-sectional view of the engaging block of the locking metal bone plate provided by the third embodiment of the present application;

[0054] Figure 10 is the front elevation cross-sectional view of the fixing ring of the locking metal bone plate provided by the fourth embodiment of the present application;

[0055] Figure 11 is the front view of the locking metal bone plate when the elastic rubber pad bulges provided by the fourth embodiment of the present application.

[0056] Description of reference numerals: 1. Bone plate; 11. Fixing hole; 111. Circular socket; 1111. Columnar through hole; 1112. First threaded hole; 1113. Second threaded hole; 12. Annular cavity; 2. Fixing member; 21. Fixing screw; 211. Screw part; 212. First stud; 213. Second stud; 214. Threaded piston cavity; 215. Piston rod; 216. Engaging member; 2161. Engaging block; 2162. Fixing ring; 2163. Elastic rubber pad; 217. Piston member; 2171. Rubber sealing ring; 218. Supporting member; 2181. Supporting rod; 2182. Moving block; 2183. Piston block; 22. Locking member; 221. Threaded connecting column; 222. Threaded cavity; 223. Strip-shaped slideway; 224. Card strip; 2241. Inclined surface; 2242. Matching inclined surface; 225. Hemispherical protrusion; 226. Annular clamping groove; 3. Bone. Detailed implementation mode

[0057] The following will be further described in detail with reference to the attached Figures 1-11 the locking metal bone plate provided by the present application.

[0058] Example 1. Please refer to Figure 1 In the embodiment of the present application, the provided locking metal bone plate includes: a bone plate 1 and a fixing member 2.

[0059] A plurality of groups of fixing holes 11 are provided on the bone plate 1, and each group of the fixing holes 11 includes two circular sockets 111 tangent to each other at the edges;

[0060] A plurality of groups of the fixing members 2 are provided and correspond to the plurality of groups of the fixing holes 11 one by one. Each group of the fixing members 2 includes two fixing screws 21. One ends of the two fixing screws 21 are screwed into the two circular sockets 111 correspondingly and are screwed into the bone 3, and the other ends are in contact with each other. A locking member 22 is provided inside one of the fixing screws 21, and an annular clamping groove 226 that can be engaged with the locking member 22 is provided outside the other fixing screw 21. While the two fixing screws 21 fix the bone plate 1 on the bone 3, through the engagement between the locking member 22 and the annular clamping groove 226, the two fixing screws 21 are locked to each other. By providing two fixing screws 21 that are in contact with each other inside each group of the fixing members 2, when the fixing screws 21 fix the bone plate 1 on the bone 3, the two fixing screws 21 are pressed against each other, thereby generating a lateral pressure, so that the two fixing screws 21 will not loosen during tightening.

[0061] Please refer to Figure 1 and Figure 3, the circular socket 111 includes a columnar through hole 1111, a first threaded hole 1112, and a second threaded hole 1113. The columnar through hole 1111 is disposed on the surface of the bone plate 1. The first threaded hole 1112 is coaxially disposed outside the columnar through hole 1111 and communicates with the columnar through hole 1111. The second threaded hole 1113 is coaxially disposed above the first threaded hole 1112. The diameter of the second threaded hole 1113 is larger than that of the first threaded hole 1112 and communicates with the columnar through hole 1111. By providing the first threaded hole 1112 and the second threaded hole 1113 arranged up and down, when the fixing screw 21 is fixed inside the first threaded hole 1112 and the second threaded hole 1113, it can receive a double fastening force, further improving the fastening ability of the fixing screw 21.

[0062] Wherein, the central axis of the circular socket 111 is perpendicular to the surface of the bone plate 1.

[0063] Please refer to Figure 2 and Figure 3 , the fixing screw 21 includes a screw portion 211, a first stud 212, and a second stud 213. One end of the screw portion 211 penetrates through the columnar through hole 1111 and is screwed into the bone 3. The first stud 212 is coaxially and fixedly assembled above the screw portion 211 and is threadedly connected to the first threaded hole 1112. The second stud 213 is coaxially and fixedly assembled above the first stud 212 and is threadedly connected to the second threaded hole 1113. By providing the first stud 212 and the second stud 213 corresponding to the first threaded hole 1112 and the second threaded hole 1113, when the first stud 212 and the second stud 213 are simultaneously screwed into the circular socket 111, they are respectively screwed into the corresponding first threaded hole 1112 and second threaded hole 1113, improving the fastening ability of the fixing screw 21 to the bone plate 1 while offsetting part of the stress.

[0064] Please refer to Figure 4 and Figure 5, the locking member 22 includes: a threaded connection post 221 coaxially disposed on the first stud 212 of one of the fixing screws 21. A threaded cavity 222 is coaxially provided inside the second stud 213 of one of the fixing screws 21 and is threadedly connected to the threaded connection post 221 through the threaded cavity 222. A strip-shaped slideway 223 extending along the radial direction of the second stud 213 itself is provided inside the second stud 213. The strip-shaped slideway 223 is disposed on the side of the threaded cavity 222. A clamping strip 224 is provided inside the strip-shaped slideway 223. A hemispherical protrusion 225 is coaxially provided at the top end of the threaded connection post 221. An inclined surface 2241 adapted to the hemispherical protrusion 225 is provided on the lower surface of one end of the clamping strip 224 close to the threaded cavity 222. A mating inclined surface 2242 is provided on the upper surface of the other end of the clamping strip 224 to avoid spatial interference when the other end of the clamping strip 224 is inserted into the annular clamping groove 226. The annular clamping groove 226 is provided on the other fixing screw 21 and is circumferentially provided on the side of the second stud 213 of the other fixing screw 21. The distance h between the lower surface of the clamping strip 224 and the lower surface of the second stud 213 and the thickness d of the threaded connection post 221 satisfy: h < d. By providing the clamping strip 224 inside one of the second studs 213 in the pair of fixing screws 21, when the second stud 213 is screwed downward into the first stud 212, the clamping strip 224 can move toward the direction of the other second stud 213, so that the mutual clamping of the two fixing screws 21 is realized by the clamping strip 224, and the fastening ability of the two fixing screws 21 is improved.

[0065] Embodiment 2. The basic structure of Embodiment 2 is the same as that of Embodiment 1, and the difference lies in:

[0066] Please refer to Figure 6 , a column-shaped slideway 219 extending along the radial direction of the second stud 213 itself is opened inside the second stud 213. An abutting member 218 is provided inside the column-shaped slideway 219. An annular sealing ring 210 is provided on the upper surface of the second stud 213 and is circumferentially arranged along the hemispherical protrusion 225. When the second stud 213 is threadedly engaged with the threaded connection post 221, the volume of the threaded cavity 222 is compressed to drive the abutting member 218 close to the second threaded hole 1113 and abut against the inner wall of the second threaded hole 1113.

[0067] Please refer to Figure 7 , the abutting member 218 includes: an abutting rod 2181 and a piston block 2183. The abutting rod 2181 is disposed inside the column-shaped slideway 219 and extends along the length direction of the column-shaped slideway 219. A moving block 2182 is fixedly connected to one end of the abutting rod 2181. The moving block 2182 is slidably connected inside the column-shaped slideway 219. The piston block 2183 is fixedly assembled on the end face of the moving block 2182 close to the threaded connection post 221.

[0068] Example 3. The basic structure of Example 3 is the same as that of Example 1, and the differences are as follows:

[0069] Please refer to Figure 8 and Figure 9 , an annular cavity 12 is provided inside the bone plate 1 below the first threaded hole 1112. A threaded piston cavity 214 is coaxially opened inside the second stud 213 and the first stud 212. A piston column 215 is threadedly connected inside the threaded piston cavity 214. Clamping members 216 are arranged on both sides of the top end of the screw portion 211. The clamping members 216 can be pushed by the piston column 215 and engage with the annular cavity 12. By using the clamping members 216, when the piston column 215 is screwed into and moves along the threaded piston cavity 214, the piston column 215 can push the clamping members 216 to engage with the annular cavity 12, thereby further improving the clamping ability of the bone plate 1.

[0070] Please refer to Figure 8 and Figure 9 , a piston member 217 is arranged outside the piston column 215. The piston member 217 includes a plurality of rubber sealing rings 2171 arranged at intervals along the piston column 215. The diameter of the rubber sealing rings 2171 is greater than the diameter of the threaded piston cavity 214. By providing the rubber sealing rings 2171 with an interference fit with the threaded piston cavity 214, when the piston column 215 moves inside the threaded piston cavity 214, its sealing performance can be ensured.

[0071] Please refer to Figure 9 , the clamping member 216 includes a clamping block 2161. Slideways are opened on both sides of the top end of the screw portion 211. The clamping block 2161 is slidably connected inside the slideways along the radial direction of the screw portion 211.

[0072] Example 4. The basic structure of Example 4 is the same as that of Example 3, and the differences are as follows:

[0073] Please refer to Figure 11 , the clamping member 216 includes a fixing ring 2162 and an elastic rubber pad 2163. Circular holes are opened on both sides of the top end of the screw portion 211. The fixing ring 2162 is coaxially fixedly assembled inside the circular holes. The elastic rubber pad 2163 is arranged on the inner wall of the fixing ring 2162. When the piston column 215 moves inside the threaded piston cavity 214, by compressing the space, pressure is applied to the elastic rubber pad 2163 by air pressure. The elastic rubber pad 2163 can deform under the action of the pressure and then protrude and extend into the annular cavity 12, and the purpose of improving the fastening ability between the fixing screw 21 and the bone plate 1 can also be achieved.

[0074] In summary, when the bone plate 1 needs to be fixed to the fracture site, the fixing members 2 of different groups are fixed on both sides of the fracture site. The fastening screws are inserted into the circular jacks 111, and the bone plate 1 is fastened to the fracture site through the threaded connections between the first threaded holes 1112 and the first studs 212, and between the second threaded holes 1113 and the second studs 213. At the same time, the two second studs 213 abut against each other, which can provide a squeezing force in the lateral direction to the two fastening screws, further improving the fastening ability of the fastening screws;

[0075] A radially slidable latch 224 can also be provided inside the second stud 213. After the two fastening screws are fastened inside the circular jack 111, the split second stud 213 is screwed onto the first stud 212. By using the extrusion of the hemispherical protrusion 225 on the first stud 212 against the inclined surface 2241 of the latch 224, when the second stud 213 is completely screwed onto the first stud 212, the latch 224 can just be inserted into the annular groove 226 of the adjacent second stud 213. At the same time, when the second stud 213 is screwed downward, it can also squeeze the air inside the threaded cavity 222 to drive the abutting member to move towards the inner wall of the second threaded hole 1113 and abut against the inner wall of the second threaded hole 1113. By using the reaction force, a lateral pressure is provided to the second stud, thereby further improving the locking ability between the two fastening screws;

[0076] An annular cavity 12 can also be provided inside the bone plate 1, and threaded piston cavities 214 are provided on the second stud 213 and the first stud 212. By screwing the piston rod 215 into the threaded piston cavity 214, the pressure inside the threaded piston is increased, and the pressure drives the engaging member 216 to move towards the inside of the annular cavity 12, thereby realizing further engagement between the fastening screw and the bone plate 1 and improving the fixing stability of the bone plate 1.

[0077] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. Locking metal bone plate, characterized in that, Comprising: An osteosynthesis plate (1), on which a plurality of groups of fixing holes (11) are provided, and each group of the fixing holes (11) includes two circular insertion holes (111) with tangent edges; Fixing members (2), a plurality of groups of the fixing members (2) are provided and correspond to the plurality of groups of the fixing holes (11) one by one. Each group of the fixing members (2) includes two fixing screws (21). One ends of the two fixing screws (21) are screwed into the two circular insertion holes (111) correspondingly and are screwed into the bone, and the other ends are in contact with each other. A locking member (22) is provided inside one of the fixing screws (21), and an annular groove (226) that can be engaged with the locking member (22) is provided outside the other fixing screw (21). While the two fixing screws (21) fix the osteosynthesis plate (1) on the bone, through the engagement between the locking member (22) and the annular groove (226), the two fixing screws (21) are interlocked with each other; The circular insertion hole (111) includes: a columnar through hole (1111), and the columnar through hole (1111) is provided on the surface of the osteosynthesis plate (1); A first threaded hole (1112), and the first threaded hole (1112) is coaxially provided outside the columnar through hole (1111) and is communicated with the columnar through hole (1111); The fixing screw (21) includes a screw part (211), a first stud (212) and a second stud (213). One end of the screw part (211) penetrates through the columnar through hole (1111) and is screwed into the bone. An annular cavity (12) is provided inside the osteosynthesis plate (1) below the first threaded hole (1112). A threaded piston cavity (214) is coaxially opened inside the second stud (213) and the first stud (212). A piston rod (215) is threadedly connected inside the threaded piston cavity (214). Clamping members (216) are provided on both sides of the top end of the screw part (211), and the clamping members (216) can be pushed by the piston rod (215) and engaged with the annular cavity (12).

2. The locking metal bone plate according to claim 1, wherein: The circular insertion hole (111) further includes; A second threaded hole (1113), and the second threaded hole (1113) is coaxially provided above the first threaded hole (1112). The diameter of the second threaded hole (1113) is larger than that of the first threaded hole (1112) and is communicated with the columnar through hole (1111).

3. The locking metal bone plate according to claim 2, wherein: The first stud (212) is coaxially and fixedly assembled above the screw part (211) and is threadedly connected with the first threaded hole (1112); The second stud (213) is coaxially and fixedly assembled above the first stud (212) and is threadedly connected with the second threaded hole (1113).

4. The locking metal bone plate according to claim 3, characterized in that, The locking member (22) includes: A threaded connection column (221), wherein the threaded connection column (221) is coaxially arranged on a first stud (212) of one of the fixing screws (21), wherein a second stud (213) of one of the fixing screws (21) is coaxially provided with a threaded cavity (222) inside and is threadedly connected to the threaded connection column (221) through the threaded cavity (222), wherein the second stud (213) is provided with a strip slideway (223) extending in its radial direction inside, wherein the strip slideway (223) is arranged in the threaded cavity The strip-shaped slideway (223) is provided with a clamping strip (224) on the side of the cavity (222), a hemispherical protrusion (225) is coaxially arranged on the top of the threaded connection column (221), a lower surface of one end of the clamping strip (224) close to the threaded cavity (222) is provided with an inclined surface (2241) adapted to the hemispherical protrusion (225), and a matching inclined surface (2242) is provided on the upper surface of the other end of the clamping strip (224) to avoid spatial interference when the other end of the clamping strip (224) is inserted into the annular clamping groove (226); The annular groove (226) is arranged on the other fixing screw (21) and is circumferentially arranged on the side of the second stud (213) of the other fixing screw (21); The distance h between the lower surface of the clamping strip (224) and the lower surface of the second stud (213) and the thickness d of the threaded connection column (221) satisfy: h <d。 5. The locking metal bone plate according to claim 4, characterized in that: The second stud (213) has a columnar slideway (219) extending radially therefrom, and a supporting member (218) is provided inside the columnar slideway (219). The upper surface of the second stud (213) is provided with an annular sealing ring (210) circumferentially arranged along the hemispherical protrusion (225). When the second stud (213) is threadedly screwed onto the threaded connecting column (221), the volume of the threaded cavity (222) is compressed to drive the supporting member (218) to approach the second threaded hole (1113) and to contact the inner wall of the second threaded hole (1113).

6. The locking metal bone plate according to claim 5, characterized in that: The abutment member (218) comprises: A supporting rod (2181), the supporting rod (2181) is arranged inside the columnar slideway (219) and extends along the length direction of the columnar slideway (219), one end of the supporting rod (2181) is fixedly connected to a moving block (2182), and the moving block (2182) is slidably connected inside the columnar slideway (219); The piston block (2183) is fixedly mounted on an end surface of the moving block (2182) close to the threaded connection column (221).

7. The locking metal bone plate according to claim 3, characterized in that: An annular cavity (12) is provided inside the bone plate (1) below the first threaded hole (1112). A threaded piston cavity (214) is coaxially formed inside the second stud (213) and the first stud (212). A piston rod (215) is threadedly connected inside the threaded piston cavity (214). Clamping members (216) are arranged on both sides of the top end of the screw part (211). The clamping members (216) can be pushed by the piston rod (215) and engage with the annular cavity (12).

8. The locking metal bone plate according to claim 7, characterized in that: A piston member (217) is arranged outside the piston rod (215). The piston member (217) includes a plurality of rubber sealing rings (2171) arranged at intervals along the piston rod (215). The diameter of the rubber sealing ring (2171) is larger than the diameter of the threaded piston cavity (214).

9. The locking metal bone plate according to claim 7, wherein: The clamping member (216) includes: A clamping block (2161). Slideways are formed on both sides of the top end of the screw part (211). The clamping block (2161) is slidably connected inside the slideways along the radial direction of the screw part (211).

10. The locking metal bone plate according to claim 9, characterized in that: The clamping member (216) includes: A fixing ring (2162). Circular holes are formed on both sides of the top end of the screw part (211). The fixing ring (2162) is coaxially and fixedly assembled inside the circular holes; An elastic rubber pad (2163). The elastic rubber pad (2163) is arranged on the inner wall of the fixing ring (2162).

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