Acromioclavicular steel plate with joint function

Abstract

The utility model provides an acromioclavicular steel plate with a joint function, and belongs to the technical field of medical instruments. The acromion steel plate solves the problem that an existing acromion steel plate is prone to dislocation in the using process. The acromioclavicular steel plate with the joint function comprises a C-shaped acromion steel plate and a long-strip-shaped clavicle steel plate, one end of the clavicle steel plate is bent to form a positioning head, and the acromion steel plate is provided with a lower fixing part and an upper fixing part which is located above the lower fixing part and used for being connected with a shoulder blade. A supporting part arranged in the vertical direction is arranged between the lower fixing part and the upper fixing part, a first receding gap is formed in the supporting part in the vertical direction, limiting protrusions are arranged on the two sides of the positioning head, the upper end face of the positioning head protrudes to form a hinge part, and a connecting groove with a downward opening is formed in the lower wall of the upper fixing part. The acromioclavicular steel plate with the joint function stably compresses the lower bone surface of the acromion, damage to the upper bone surface or the lower bone surface caused by large transverse displacement of the positioning head is avoided, and the use stability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment and relates to a shoulder-lock steel plate with joint function. Background Art

[0002] The acromioclavicular joint forms the human shoulder girdle, and is a joint with nearly 20 degrees of motion in all directions, and its stability is mainly maintained by ligaments. Acromioclavicular joint dislocation is relatively common in clinical practice. After the ligament capsule is damaged, the distal end of the clavicle is easily dislocated upward due to muscle traction and the weight of the shoulder girdle. Therefore, the steel plate with hooks is widely used at home and abroad. The steel plate has the function of resisting the distal end of the clavicle from dislocating upward, but the hook is long and fixed. During joint movement, it is easy to scrape the subacromial bone, or even protrude into the shoulder joint, causing bone damage and pain. In addition, the stability of the steel plate is not enough, and dislocation is still possible after surgery.

[0003] The other structure in which an acromion plate is connected to the acromion of the scapula has not been clinically used. The acromion plate is provided with screws connected to the acromion of the scapula. The acromion plate is provided with a movable groove on the lower end surface, and a clavicle plate is connected to the clavicle. The distal end of the clavicle plate has a hemispherical connector, and the hemispherical connector is vertically embedded in the movable groove. The mechanical principle is to use the screws of the acromion plate to withstand tens of pounds of upward pulling force, and in real life, the acromio-clavicular joint has 20° of movement in all directions. The force of prying open the acromion plate is amplified, which can easily cause the screws to be pulled out and fail. Friction and pressure with the scapula during movement can easily cause bone absorption and dislocation. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes an acromioclavicular steel plate with joint function. The technical problem to be solved by the utility model is: how to solve the problem that the prior acromion steel plate is prone to dislocation when in use.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A shoulder-clavicular steel plate with joint function comprises a "匚"-shaped acromion steel plate and a long strip-shaped clavicle steel plate, one end of the clavicle steel plate is bent to form a positioning head, characterized in that the acromion steel plate comprises a lower fixing portion and an upper fixing portion located above the lower fixing portion and used to connect with the scapula, a vertically arranged support portion is arranged between the lower fixing portion and the upper fixing portion, a clearance gap is vertically opened on the upper edge of the support portion, both sides of the positioning head have limiting protrusions, the upper end surface of the positioning head protrudes to form a hinge portion, a connecting groove with an opening facing downward is opened on the lower wall of the upper fixing portion, the positioning head can pass through the clearance gap to make the hinge portion upwardly embedded in the connecting groove, and the limiting protrusion can be blocked by the inner side surface of the support portion.

[0007] Working principle: When the acromion plate is connected to the clavicle plate, the positioning head is vertically passed through the clearance gap 1 of the support part, and then the positioning head is rotated 90 degrees after passing through the clearance gap 1. The limiting protrusion of the positioning head is blocked by the inner side of the support part, and the positioning head slides vertically, so that the hinge part is vertically embedded into the connecting groove upward, thereby realizing the hinge connection between the positioning head and the acromion plate. The support part is located at the back side of the acromioclavicular joint and is closely abutted against the bone at the acromion and limited, so that when the scapula moves 20° in each direction, the hinge part can always contact and rotate with the groove wall of the upper connecting groove, so that the acromioclavicular joint can move normally and realize normal acromioclavicular joint function. The clavicle plate is fixed to the outer end of the clavicle, and the acromion plate is fixed to the acromion of the scapula, and is embedded in the upper and lower bone surfaces of the acromion in a "匚" shape. The lower fixing part is inserted into the lower bone surface of the corresponding acromion of the scapula and is closely attached to the lower bone surface. The upper fixing part is tightly attached to the upper bone surface of the acromion by bolts and is fastened to the lower fixing part, and is fixed to the acromion by screws. When the clavicle is fractured, the clavicle has an upward thrust, which presses the positioning head against the acromion plate, and can resist the upward pulling force of the acromioclavicular joint. The hinged part is embedded in the connecting groove to realize the hinge connection of the clavicle plate and the acromion plate. The setting of the limiting protrusion realizes the lateral limitation of the clavicle plate and the acromion plate, and converts the upward dislocation force of the distal end of the clavicle into pressure on the lower bone surface of the acromion of the scapula, and utilizes the lower part of the "匚"-shaped steel plate to compress the lower bone surface of the acromion stably, which not only avoids the damage to the upper or lower bone surface caused by the large lateral displacement of the positioning head, but also avoids the risk of the acromion plate being easily pulled out under the action of the clavicle dislocation force due to the screw fixing on the upper bone surface of the acromion, thereby improving the stability of the acromioclavicular plate.

[0008] In the above-mentioned acromioclavicular steel plate with joint function, the limiting protrusion is columnar, and the upper and lower side surfaces of the limiting protrusion are both arc surfaces.

[0009] The shape setting of the limiting protrusion can ensure the structural strength of the limiting protrusion, and by setting the upper and lower sides of the limiting protrusion as arc surfaces, the friction with the scapula can be reduced after actual installation, and the wear can be reduced when the shoulder joint moves, thereby improving the stability of the shoulder lock plate.

[0010] In the above-mentioned shoulder-lock steel plate with joint function, the hinge part is hemispherical, the limiting protrusion is arranged near the middle of the hinge part, and the height of the positioning head is smaller than the width of the clearance gap.

[0011] By directly setting the hinge part to a hemispherical shape and setting the position of the limiting protrusion close to the middle of the hinge part, when the shoulder joint moves, the hinge part and the limiting protrusion will not affect the rotation of the scapula, thereby reducing the friction between the scapula and the scapula. The height design of the positioning head allows the positioning head to quickly pass through the clearance gap, thereby ensuring the convenience of installation.

[0012] The limiting protrusions can be located on both sides of the positioning head or on both sides of the hinge part.

[0013] In the above acromioclavicular plate with joint function, the clavicle plate includes a connecting part that is strip-shaped and used for connecting with the upper bone surface of the clavicle, and an extension part that bends downward and is connected to the positioning head, and the extension part and the connecting part are vertically arranged.

[0014] When the extension part and the connecting part are vertically arranged, when there is an upward thrust on the clavicle, the connecting part is connected to the upper bone surface of the clavicle and has a tendency to push the connecting part upward. As the force transmission, the extension part can transmit most of the upward thrust to the positioning head, so that the positioning head can be stably pressed in the connecting groove, improving the stability of the use of the acromioclavicular plate.

[0015] In the above acromioclavicular plate with joint function, the width of the support part is smaller than the width of the upper fixing part. A first yielding gap vertically penetrates through the support part, and a third yielding gap communicating with the first yielding gap is formed on the lower fixing part, and the third yielding gap vertically penetrates through the lower fixing part.

[0016] With this structure, it is convenient for the positioning head to quickly pass through the first yielding gap, and the support part can be made narrower, which is convenient for the installation of the acromion plate.

[0017] In the above acromioclavicular plate with joint function, a plurality of threaded connection holes are formed on the connecting part, and a connecting strengthening part protruding forward is arranged on the connecting part, and a threaded fixing hole is formed on the connecting strengthening part.

[0018] The connecting part and the connecting strengthening part of the clavicle plate are fixedly connected to the upper bone surface of the clavicle by screws. To ensure the strength of the clavicle plate, the extension part and the positioning head formed by downward bending realize the connection between the clavicle plate and the acromion plate, and the connecting part, the extension part and the positioning head of the clavicle plate are integrally formed, making its stability better.

[0019] The setting of the connecting strengthening part not only improves the structural strength of the clavicle plate, but also improves the connection strength between the clavicle plate and the clavicle. The front-back direction here refers to the front-back direction of the human body itself.

[0020] In the above acromioclavicular plate with joint function, the limiting protrusions are symmetrically arranged radially along the hinge part.

[0021] With this structure, the limiting protrusions can play a positioning role without affecting the movement of the hinge part, ensuring that the shoulder joint has a 20° movement space in all directions.

[0022] In the above-mentioned acromioclavicular steel plate with joint function, the upper fixing part has multiple fixing holes one and one fixing hole two, and the upper fixing part can be connected to the upper bone surface of the scapula by passing a screw through the fixing hole one, and the lower fixing part has a fixing hole three arranged corresponding to the fixing hole two, and the upper fixing part and the lower fixing part are connected by screws passing through the fixing hole two and the fixing hole three in turn.

[0023] By connecting the upper fixing part and the lower fixing part through screws passing through the second fixing hole and the third fixing hole in sequence, the connection between the lower fixing part and the upper fixing part is made more stable, and the lower fixing part can be stably fitted with the lower bone surface of the scapula, thereby improving the stability of the fixed connection between the acromion plate and the scapula.

[0024] In the above-mentioned acromioclavicular steel plate with joint function, the second fixing hole is arranged near the middle of the upper fixing part relative to the first fixing hole.

[0025] The position of the second fixing hole is set so that the connection between the upper fixing part and the lower fixing part is located in the middle. The middle part has higher strength and more stable force, which improves the stability of the connection between the lower fixing part and the upper fixing part.

[0026] A shoulder-clavicular steel plate with joint function comprises a "匚"-shaped acromion steel plate and a long strip-shaped clavicle steel plate, one end of the clavicle steel plate is bent to form a positioning head, characterized in that the acromion steel plate comprises a lower fixing portion and an upper fixing portion located above the lower fixing portion and used to connect with the scapula, the lower fixing portion comprises two limiting hooks distributed along the front and back, the upper end surface of the positioning head is raised to form a hinge portion, a lower connecting groove with an opening facing downward is provided on the lower wall of the lower fixing portion, a clearance gap 2 is formed between the two limiting hooks, both sides of the positioning head are provided with limiting protrusions, the positioning head can pass through the clearance gap 2 to make the hinge portion upwardly embedded in the lower connecting groove, and the limiting protrusion can be blocked by the inner side surface of the limiting hook.

[0027] Working principle: When the acromion plate is connected to the clavicle plate, the positioning head is tilted through the second clearance gap of the limiting support part so that the lower limiting protrusion is stuck in the lower connecting groove, and then the positioning head is restored to its normal state (no tilt). At this time, the inner side of the limiting hook hooks the limiting protrusion of the positioning head, thereby realizing the hinge connection between the positioning head and the acromion plate. The support part is located at the back side of the acromioclavicular joint and is closely abutted against the bone at the acromion for limitation. The hinged part can always rotate in contact with the groove wall of the connecting groove, so that the acromioclavicular joint can move normally and realize normal acromioclavicular joint function. The clavicle plate is fixed to the outer end of the clavicle, and the acromion plate is fixed to the acromion of the scapula, and is embedded in the upper and lower bone surfaces of the acromion in a "匚" shape. The lower fixing part is inserted into the lower bone surface of the corresponding acromion of the scapula and fits tightly with the lower bone surface, and the upper fixing part is close to the upper bone of the acromion. The surface is fastened and fixed to the lower fixing part by bolts, and is fixed to the acromion by screws. When a fracture occurs, the clavicle part has an upward thrust, which presses the positioning head against the acromion plate, and can resist the upward pulling force of the acromioclavicular joint. The hinged part is embedded in the connecting groove to realize the hinge connection of the clavicle plate and the acromion plate. The setting of the limiting protrusion realizes the lateral limitation of the clavicle plate and the acromion plate, and converts the upward dislocation force of the distal end of the clavicle into pressure on the inferior bone surface of the acromion of the scapula, and utilizes the lower part of the "匚"-shaped steel plate to compress the inferior bone surface of the acromion stably, which not only avoids the damage to the upper or lower bone surface caused by a large lateral displacement of the positioning head, but also avoids the risk of the acromion plate being easily pulled out under the action of the clavicle dislocation force due to the screw fixing on the upper bone surface of the acromion, thereby improving the stability of the acromioclavicular plate.

[0028] In the above-mentioned acromioclavicular steel plate with joint function, the limiting hook includes a limiting support portion inclined from top to bottom toward a direction away from the clavicle steel plate and a limiting reinforcement portion arranged laterally, and the limiting protrusion can abut against the limiting support portion.

[0029] The arrangement of this structure, on the one hand, allows the muscles inside the shoulder blade and other parts to make way, and on the other hand, facilitates the positioning of the limit hook.

[0030] In the above-mentioned shoulder-lock steel plate with joint function, the second clearance gap is located between the two limiting hooks, and there is a clearance space between the limiting reinforcement part and the lower fixing part for the positioning head to rotate.

[0031] The position setting of the limit hook improves the stability of the limit hook, and also through the setting of the clearance space, the limit hook does not affect the rotation of the positioning head, ensuring that the normal acromioclavicular joint function can be achieved after the acromioclavicular plate is installed.

[0032] Compared with the prior art, the utility model has the following advantages:

[0033] 1. Fix the acromion plate to the acromion of the scapula and embed it into the upper and lower bone surfaces of the acromion in a "匚" shape. The lower fixing part is inserted into the lower bone surface of the corresponding acromion of the scapula and fits tightly with the lower bone surface. The upper fixing part is tightly attached to the upper bone surface of the acromion and is fastened and fixed to the lower fixing part by bolts, and is fixed to the acromion by screws. When the clavicle is fractured, there is an upward thrust, and the positioning head is pressed against the acromion plate to resist the upward pulling force of the acromioclavicular joint. The hinged part is embedded in the connecting groove to realize the hinged connection of the clavicle plate and the acromion plate. The setting of the limit protrusion can realize lateral limitation of the clavicle plate and the acromion plate, and convert the upward dislocation force of the distal end of the clavicle into pressure on the subacromial bone surface of the scapula, and utilize the lower part of the "匚"-shaped steel plate to exert stable pressure on the subacromial bone surface, which can not only avoid large lateral displacement of the positioning head to cause damage to the upper or lower bone surface, but also avoid the risk of fixing the acromion plate on the upper bone surface of the acromion by screws only, resulting in the risk of the screws being easily pulled out under the action of the clavicle dislocation force, thereby improving the stability of the acromioclavicular plate.

[0034] 2. The extension part and the connection part are arranged vertically. When the clavicle has an upward thrust, the connection part is connected to the upper bone surface of the clavicle, which has a tendency to push the connection part to move upward. The extension part, as a force transmitter, can transfer most of the upward thrust to the positioning head, so that the positioning head can be stably pressed in the connecting groove, thereby improving the stability of the acromioclavicular plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of the first embodiment.

[0036] Figure 2 It is a top view of the first embodiment.

[0037] Figure 3 yes Figure 2 Sectional view of AA.

[0038] Figure 4 Schematic diagram of the structure of the shoulder steel plate in the first embodiment.

[0039] Figure 5 It is a schematic diagram of the structure of the clavicle steel plate in the first embodiment.

[0040] Figure 6 It is a structural diagram of the second embodiment.

[0041] Figure 7 It is a top view of the second embodiment.

[0042] Figure 8 yes Figure 7 Cross-sectional view of BB.

[0043] Figure 9 It is a schematic diagram of the structure of the shoulder steel plate in the second embodiment.

[0044] Figure 10 It is a schematic diagram of the structure of the clavicle steel plate in the second embodiment.

[0045] In the figure, 1, acromion steel plate; 11, upper fixing part; 11a, upper connecting groove; 11b, fixing hole one; 11c, fixing hole two; 12, lower fixing part; 12a, fixing hole three; 12b, lower connecting groove; 12c, clearance three; 13, supporting part; 13a, clearance one; 15, limiting hook; 15a, limiting supporting part; 15b, limiting reinforcement part; 16, clearance two; 17, clearance space; 2, clavicle steel plate; 21, positioning head; 21a, limiting protrusion; 21b, hinged part; 21b1, spherical limiting surface; 22, connecting part; 22a, threaded connecting hole; 22b, connecting reinforcement part; 22c, threaded fixing hole; 23, extension part. DETAILED DESCRIPTION

[0046] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0047] Embodiment 1

[0048] like Figure 1 As shown, the acromioclavicular steel plate with joint function includes a "匚"-shaped acromion steel plate 1 and a long strip-shaped clavicle steel plate 2, and one end of the clavicle steel plate 2 is bent to form a positioning head 21.

[0049] Specifically, if Figure 1-5 As shown, the acromion steel plate 1 has a lower fixing portion 12 and an upper fixing portion 11 located above the lower fixing portion 12 and used to connect with the scapula, a vertically arranged support portion 13 is arranged between the lower fixing portion 12 and the upper fixing portion 11, a vertically arranged clearance 13a is provided on the support portion 13, both sides of the positioning head 21 have limiting protrusions 21a, the upper end surface of the positioning head 21 is convex to form a hinge portion 21b with a spherical limiting surface 21b1, and an upper connecting groove 11a with an opening facing downward and in contact with the spherical limiting surface 21b1 is provided on the lower wall of the upper fixing portion 11, the positioning head 21 can pass through the clearance 13a to make the hinge portion 21b upwardly embedded in the upper connecting groove 11a, and the limiting protrusion 21a can be blocked by the inner side of the support portion 13.

[0050] Working principle: When the acromial plate 1 is connected to the clavicular plate 2, the positioning head 21 vertically passes through the clearance one 13a of the supporting part 13. After the positioning head 21 passes through the clearance one 13a, it rotates 90 degrees. The limiting protrusion 21a of the positioning head 21 is blocked by the inner side surface of the supporting part 13. The positioning head 21 slides vertically, so that the hinged part 21b vertically embeds into the connecting groove, realizing the hinge connection between the positioning head 21 and the acromial plate 1. The supporting part 13 is tightly abutted against the bone mass at the rear side of the acromioclavicular joint and the acromion for limiting. When the scapula moves 20° in all directions, the hinged part 21b can always contact and rotate with the groove wall of the upper connecting groove 11a, so that the acromioclavicular joint can move normally and the normal function of the acromioclavicular joint is realized. The clavicular plate 2 is fixed at the outer end of the clavicle, and the acromial plate 1 is fixed on the acromion of the scapula and is embedded in the upper and lower bone surfaces of the acromion in a "C" shape. The lower fixing part 12 is inserted into the lower bone surface of the corresponding acromion of the scapula and is tightly attached to the lower bone surface. The upper fixing part 11 is closely attached to the upper bone surface of the acromion and is fixedly fastened to the lower fixing part 12 by bolts and is fixed to the acromion by screws. When there is an upward thrust on the clavicle during a fracture, the positioning head 21 is pressed against the acromial plate 1, which can resist the upward pulling force of the acromioclavicular joint. The hinge connection between the clavicular plate 2 and the acromial plate 1 is realized by the hinged part 21b being embedded in the connecting groove. Through the setting of the limiting protrusion 21a, the lateral limitation of the clavicular plate 2 and the acromial plate 1 is realized, and the upward dislocation force of the distal end of the clavicle is converted into the pressure on the lower bone surface of the acromion of the scapula. Moreover, the stable compression of the lower part of the "C" - shaped plate on the lower bone surface of the acromion is utilized. This not only avoids the risk of the positioning head 21 having a large lateral displacement and causing damage to the upper or lower bone surfaces, but also avoids the risk of the acromial plate 1 being easily pulled off the upper bone surface of the acromion by the screw under the action of the clavicle dislocation force, improving the stability of the use of the acromioclavicular plate.

[0051] As Figure 2-5 shown, the upper fixing part 11 has a plurality of fixing holes one 11b and a fixing hole two 11c. The upper fixing part 11 can be connected to the upper bone surface of the scapula by screws passing through the fixing holes one 11b. The lower fixing part 12 has a fixing hole three 12a corresponding to the fixing hole two 11c. The upper fixing part 11 and the lower fixing part 12 are connected by screws passing through the fixing hole two 11c and the fixing hole three 12a in sequence. The fixing hole two 11c is arranged closer to the middle of the upper fixing part 11 relative to the fixing holes one 11b.

[0052] As Figure 2-5 shown, the limiting protrusion 21a is columnar, the upper and lower side surfaces of the limiting protrusion 21a are both arc - shaped, the hinged part 21b is hemispherical, the limiting protrusion 21a is arranged closer to the middle of the hinged part 21b, and the height of the positioning head 21 is less than the width of the clearance one 13a.

[0053] As Figure 3 and Figure 5As shown, the clavicle steel plate 2 includes a long strip-shaped connecting portion 22 and an extending portion 23 bent downward and connected to the positioning head 21. The extending portion 23 and the connecting portion 22 are vertically arranged. A plurality of threaded connecting holes 22a are provided on the connecting portion 22. The connecting portion 22 has a forwardly protruding connecting reinforcement portion 22b, and a threaded fixing hole 22c is provided on the connecting reinforcement portion 22b.

[0054] like Figure 3 As shown, the width of the support portion 13 is smaller than the width of the upper fixing portion 11, the clearance gap 13a of the support portion 13 vertically penetrates the support portion 13, and a clearance gap 12c connected to the clearance gap 13a is provided on the lower fixing portion 12, the clearance gap 12c vertically penetrates the lower fixing portion 12, and the limiting protrusions 21a are radially symmetrically arranged along the hinge portion 21b.

[0055] Embodiment 2

[0056] like Figure 6-10 As shown, the acromioclavicular steel plate with joint function comprises a "匚"-shaped acromion steel plate 1 and a long strip-shaped clavicle steel plate 2, one end of the clavicle steel plate 2 is bent to form a positioning head 21, characterized in that the acromion steel plate 1 comprises a lower fixing portion 12 and an upper fixing portion 11 located above the lower fixing portion 12 and used to connect with the scapula, the lower fixing portion 12 extends downward to form two limiting hooks 15 distributed along the front and back, the upper end surface of the positioning head 21 is convex to form a hinge portion 21b with a spherical limiting surface 21b1, and the lower fixing portion 12 is provided with a plurality of upper fixing hooks 15 disposed on the upper end surface of the positioning head 21. A lower connecting groove 12b with an opening facing downward and in contact with the spherical limiting surface 21b1 is provided on the lower wall of the fixed portion 12. A clearance gap 16 is formed between the two limiting hooks 15. The limiting hook 15 includes a limiting support portion 15a and a limiting reinforcement portion 15b arranged along the transverse direction. Both sides of the positioning head 21 are provided with limiting protrusions 21a. The positioning head 21 can pass through the clearance gap 16 to make the hinged portion 21b upwardly embedded in the lower connecting groove 12b, and the limiting protrusion 21a can be blocked by the inner side surface of the limiting support portion 15a.

[0057] Working principle: When the acromion plate 1 is connected to the clavicle plate 2, the positioning head 21 is obliquely passed through the clearance two 16 of the limiting support part 15a, so that the lower limiting protrusion 21a is snapped into the lower connecting groove 12b, and then the positioning head returns to its normal state (without inclination). At this time, the inner side surface of the limiting support part 15a hooks the limiting protrusion 21a of the positioning head 21, realizing the hinge connection between the positioning head 21 and the acromion plate 1. The support part 13 is located at the rear side of the acromioclavicular joint and is in close contact with the bone mass at the acromion for limiting. Since the hinge part 21b has a spherical limiting surface 21b1, when the scapula moves 20° in all directions, the spherical limiting surface 21b1 of the hinge part 21b can always contact and rotate with the groove wall of the connecting groove, so that the acromioclavicular joint can move normally, realizing the normal function of the acromioclavicular joint. The clavicle plate 2 is fixed at the outer end of the clavicle, and the acromion plate 1 is fixed on the acromion of the scapula and is embedded in the upper and lower bone surfaces of the acromion in a "C" shape. The lower fixing part 12 is inserted into the lower bone surface of the corresponding acromion of the scapula and is in close fit with the lower bone surface. The upper fixing part 11 is closely attached to the upper bone surface of the acromion and is fastened to the lower fixing part 12 by bolts and fixed to the acromion by screws. When there is a fracture, the clavicle part has an upward thrust, pressing the positioning head 21 tightly on the acromion plate 1, which can resist the upward pulling force of the acromioclavicular joint. The hinge connection between the clavicle plate 2 and the acromion plate 1 is realized by the hinge part 21b being embedded in the connecting groove. Through the setting of the limiting protrusion 21a, the lateral limit of the clavicle plate 2 and the acromion plate 1 is realized, turning the upward dislocation force of the distal clavicle into a pressure on the lower bone surface of the scapula acromion, and using the lower part of the "C" - shaped plate to stably press the lower bone surface of the acromion. This not only avoids the risk of the positioning head 21 having a large lateral displacement and causing damage to the upper or lower bone surfaces, but also avoids the risk of the acromion plate 1 being easily pulled off the upper bone surface of the acromion by the screw under the action of the clavicle dislocation force, improving the stability of the use of the acromioclavicular plate.

[0058] As Figure 7-10 shown, the upper fixing part 11 has a plurality of fixing holes one 11b and a fixing hole two 11c. The upper fixing part 11 can be connected to the upper bone surface of the scapula by screws passing through the fixing holes one 11b. The lower fixing part 12 has a fixing hole three 12a corresponding to the fixing hole two 11c. The upper fixing part 11 and the lower fixing part 12 are connected by screws passing through the fixing hole two 11c and the fixing hole three 12a in sequence. The fixing hole two 11c is arranged closer to the middle of the upper fixing part 11 relative to the fixing holes one 11b.

[0059] As Figure 7-10 shown, the limiting protrusion 21a is columnar, and the upper and lower side surfaces of the limiting protrusion 21a are both arc - shaped. The hinge part 21b is hemispherical. The limiting protrusion 21a is arranged closer to the middle of the hinge part 21b. The height of the positioning head 21 is less than the width of the clearance one 13a.

[0060] As Figure 7 andFigure 10 As shown, the clavicle steel plate 2 includes a long strip-shaped connecting portion 22 and a downwardly bent extending portion 23, the extending portion 23 and the connecting portion 22 are vertically arranged, the extending portion 23 is connected to the positioning head 21, a plurality of threaded connecting holes 22a are provided on the connecting portion 22, and a forwardly protruding connecting reinforcement portion 22b is provided on the connecting portion 22, and a threaded fixing hole 22c is provided on the connecting reinforcement portion 22b.

[0061] like Figure 8 As shown, the width of the support portion 13 is smaller than that of the upper fixing portion 11, the clearance gap 13a of the support portion 13 vertically penetrates the support portion 13 and the lower fixing portion 12, and the limiting protrusions 21a are radially symmetrically arranged along the hinge portion 21b.

[0062] like Figure 8 As shown in FIG. 9 , there is a clearance space 17 between the limiting reinforcement portion 15 b and the lower fixing portion 12 for the positioning head 21 to rotate, and the limiting support portion 15 a is inclined from top to bottom toward a direction away from the clavicle steel plate 2 .

[0063] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An acromioclavicular plate with joint function, comprising an acromion plate (1) in a "C" shape and a clavicle plate (2) in a long strip shape. One end of the clavicle plate (2) is bent to form a positioning head (21), characterized in that, The acromion plate (1) has a lower fixing part (12) and an upper fixing part (11) located above the lower fixing part (12) and used for connecting with the scapula. A support part (13) arranged vertically is provided between the lower fixing part (12) and the upper fixing part (11). A first relief gap (13a) is vertically formed on the support part (13). Both sides of the positioning head (21) have limiting protrusions (21a). An upper end surface of the positioning head (21) protrudes to form a hinge part (21b). An upper connecting groove (11a) with a downward opening is formed on a lower wall of the upper fixing part (11). The positioning head (21) can pass through the first relief gap (13a) to embed the hinge part (21b) upward into the upper connecting groove (11a), and the limiting protrusions (21a) can be blocked by an inner side surface of the support part (13).

2. The acromioclavicular plate with joint function according to claim 1, characterized in that, The limiting protrusions (21a) are columnar, and upper and lower side surfaces of the limiting protrusions (21a) are both arc surfaces.

3. The acromioclavicular plate with joint function according to claim 1 or 2, characterized in that, The hinge part (21b) is hemispherical. The limiting protrusions (21a) are arranged near a middle part of the hinge part (21b). A height of the positioning head (21) is less than a width of the first relief gap (13a).

4. The acromioclavicular plate with joint function according to claim 1 or 2, characterized in that, The clavicle plate (2) includes a connecting part (22) which is strip-shaped and used for connecting with an upper bone surface of the clavicle, and an extending part (23) which is bent downward and connected with the positioning head (21). The extending part (23) and the connecting part (22) are vertically arranged.

5. The acromioclavicular plate with joint function according to claim 1 or 2, characterized in that, A width of the support part (13) is less than a width of the upper fixing part (11). The first relief gap (13a) of the support part (13) vertically penetrates through the support part (13). A third relief gap (12c) communicated with the first relief gap (13a) is formed on the lower fixing part (12). The third relief gap (12c) vertically penetrates through the lower fixing part (12).

6. The acromioclavicular plate with joint function according to claim 4, characterized in that, The connecting part (22) has a connecting strengthening part (22b) protruding forward. A threaded fixing hole (22c) is formed on the connecting strengthening part (22b).

7. The acromioclavicular plate with joint function according to claim 1 or 2, characterized in that, The limiting protrusions (21a) are symmetrically arranged radially along the hinge part (21b).

8. An acromioclavicular plate with joint function, comprising an acromion plate (1) in a "C" shape and a clavicle plate (2) in a long strip shape. One end of the clavicle plate (2) is bent to form a positioning head (21), characterized in that, The acromion plate (1) has a lower fixing part (12) and an upper fixing part (11) located above the lower fixing part (12) and used for connecting with the scapula. The lower fixing part (12) has two limiting hooks (15) distributed in the front and rear. A lower connecting groove (12b) is formed on a lower wall of the lower fixing part (12). An upper end surface of the positioning head (21) protrudes to form a hinge part (21b). A second relief gap (16) is formed between the two limiting hooks (15). Both sides of the positioning head (21) have limiting protrusions (21a). The positioning head (21) can pass through the second relief gap (16) to embed the hinge part (21b) upward into the lower connecting groove (12b), and at the same time, the limiting protrusions (21a) can be blocked by an inner side surface of the limiting hooks (15).

9. The acromioclavicular plate with joint function according to claim 8, characterized in that, The limiting hook (15) comprises a limiting support portion (15a) arranged obliquely from top to bottom in a direction away from the clavicle steel plate (2) and a limiting reinforcement portion (15b) arranged in a transverse direction, and the limiting protrusion (21a) can abut against the limiting support portion (15a).

10. The acromioclavicular plate with joint function according to claim 9, characterized in that, A clearance space (17) is provided between the position-limiting reinforcement portion (15b) and the lower fixing portion (12) for the positioning head (21) to rotate.

Images