Distraction device for maxillofacial surgery

Abstract

The utility model belongs to the technical field of oral medical instruments, and particularly relates to a dilator for maxillofacial surgery, which comprises a first connecting rod and a second connecting rod which are rotationally connected through a pin. One ends of the first connecting rod and the second connecting rod are rotationally connected with cushion blocks respectively, and the other ends are fixedly connected with a first finger ring and a second finger ring; a positioning arc strip is connected to the inner side of the first connecting rod, a through groove is formed in the side face of the second connecting rod, and the positioning arc strip is locked by a locking assembly when penetrating through the through groove; the locking assembly comprises a driving plate, a locking plate and an elastic piece, a positioning column is arranged at one end of the driving plate, the other end of the driving plate is connected with a hand buckling piece and an anti-skid block, and locking and unlocking are achieved through the elastic piece; a magnet is fixed below the cushion block and is adsorbed on the connecting rod for positioning in an initial state, so that shaking is prevented; anti-slip strips are arranged at the tops of the cushion blocks to increase friction force; the device is simple in structure and convenient to operate, the cushion block can be kept to be attached to teeth, shaking is prevented, and stable locking and quick unlocking of the opening angle are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oral medical devices, and particularly relates to a retractor for maxillofacial surgery. Background Art

[0002] In oral medicine, during oral examinations and surgeries, the retraction of the maxillofacial region is an important operation step. Traditional retractors usually rely on manual operation, and the opening and closing angle of the retractor is adjusted manually to achieve the purpose of retraction. However, this manual operation method has many deficiencies.

[0003] Firstly, traditional maxillofacial retractors usually have a simple structure and rely on manual adjustment of the opening and closing angle. Not only is the operation cumbersome, but it is also easy to cause discomfort or harm to patients due to improper force control. In addition, during the use of traditional retractors, due to the lack of an effective positioning device, the cushion block tends to shake, and it is impossible to ensure that the cushion block always fits on the teeth during retraction. This not only affects the retraction effect but may also cause additional harm to the patient's oral cavity.

[0004] Secondly, existing maxillofacial retractors usually lack an automatic locking function. The operator needs to continuously apply force to maintain the retracted state, which not only increases the operation difficulty and fatigue but also easily leads to unstable retraction angles, affecting the accuracy and efficiency of oral surgeries or examinations. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a retractor for maxillofacial surgery, which can solve the problems such as the shaking of the cushion block, cumbersome operation, and lack of locking function existing in the traditional retractor during the operation process, and improve the efficiency and safety of oral surgeries and examinations.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A retractor for maxillofacial surgery includes a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are arranged oppositely, and the first connecting rod and the second connecting rod are rotatably connected by a pin;

[0008] One end of each of the first connecting rod and the second connecting rod is rotatably connected with a cushion block, and the other ends are respectively fixedly connected with a first finger ring and a second finger ring;

[0009] A positioning arc bar is connected to the inner side of the first connecting rod, and a through groove is formed through the side surface of the second connecting rod;

[0010] When the first finger ring and the second finger ring approach each other, the positioning arc bar passes through the through groove;

[0011] A locking component is rotatably connected to the outer side of the second connecting rod. When the positioning arc strip passes through the through groove, the locking component can lock the position of the positioning arc strip.

[0012] Furthermore, first pin-connecting plates are symmetrically and fixedly connected to the outer side of the bent portion of the first connecting rod, and first pin-connecting holes are formed through the side surfaces of the first pin-connecting plates;

[0013] A third pin-connecting plate is fixedly connected to the midline of the outer side of the bent portion of the second connecting rod, and a third pin-connecting hole corresponding to the first pin-connecting hole is formed through the side surface of the third pin-connecting plate.

[0014] Furthermore, second pin-connecting plates are symmetrically and fixedly connected to one end of the first connecting rod, and second pin-connecting holes are formed through the side surfaces of the second pin-connecting plates;

[0015] Fourth pin-connecting plates are symmetrically and fixedly connected to one end of the second connecting rod, and fourth pin-connecting holes are formed through the side surfaces of the fourth pin-connecting plates;

[0016] A fifth pin-connecting plate is fixedly connected to the bottom of the cushion block, and a fifth pin-connecting hole is formed through the side surface of the fifth pin-connecting plate.

[0017] Furthermore, a magnet is fixedly connected to the lower part of one end of the cushion block.

[0018] Furthermore, anti-slip strips are evenly distributed on the top of the cushion block.

[0019] Furthermore, a positioning groove is formed in the side surface of the first connecting rod, and a connecting plate adapted to the positioning groove is fixedly connected to one end of the positioning arc strip;

[0020] Threaded grooves are symmetrically formed in the bottom of the positioning groove, and connecting holes corresponding to the threaded grooves are formed through the upper end surface of the connecting plate.

[0021] Furthermore, the locking component includes a driving plate, a positioning post is arranged at one end of the driving plate, and positioning seats adapted to the positioning post are symmetrically formed in the side surface of the second connecting rod.

[0022] Furthermore, a locking plate is fixedly connected to the side surface of one end of the driving plate, positioning teeth are evenly distributed on the outer side of the positioning arc strip along the arc direction thereof, and the locking plate can be clamped between adjacent positioning teeth.

[0023] Furthermore, an elastic member is fixedly connected to the other side of the driving plate.

[0024] Furthermore, a buckle member is fixedly connected to the other end of the driving plate, an anti-slip block is fixedly connected to the inner side of the buckle member, and anti-slip lines are evenly formed in the anti-slip block.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] Firstly, in the maxillofacial distractor of the present utility model, a magnet is fixedly connected to the bottom of the cushion block. In the initial state, the magnet will adsorb on the first connecting rod and the second connecting rod, ensuring that the cushion block can be effectively positioned when placed inside the oral cavity and preventing shaking. This design improves the stability of the operation, enabling the cushion block to always fit on the teeth during the entire distraction process and providing a more stable and comfortable distraction effect.

[0027] Secondly, first finger rings and second finger rings are respectively fixedly connected to one ends of the first connecting rod and the second connecting rod. By applying force with the fingers, the maxillofacial region can be distracted. When the middle finger and the thumb apply force to make the first finger ring and the second finger ring approach each other, the positioning arc strip will pass through the through groove. The mutual cooperation between the positioning arc strip and the locking assembly enables the operator to achieve automatic locking at any opening and closing angle. When the thumb and the middle finger stop exerting force, the locking plate engages with the positioning teeth, thereby fixing the position of the positioning arc strip and ensuring the stability and continuity of the distraction.

[0028] In addition, the design of the locking assembly makes the operation more convenient. Through the coordinated action of the driving plate, the elastic member, and the anti-slip block, the operator only needs to use the index finger to pull the anti-slip block, and the elastic deformation of the elastic member can be used to separate the locking plate from the positioning teeth, thereby quickly releasing the locking of the positioning arc strip. This design not only simplifies the operation steps but also reduces the burden on the operator and improves the operation efficiency.

[0029] Finally, through the pin joint plates and pin joint holes respectively arranged at one ends of the first connecting rod and the second connecting rod, the flexible connection between the components is ensured, enabling the entire distractor to provide a stable distraction effect during use and being able to be flexibly adjusted according to actual needs. The anti-slip strips evenly distributed on the top of the cushion block further enhance the friction between the cushion block and the teeth, prevent sliding, and ensure a stable supporting force during the distraction process.

[0030] In summary, the maxillofacial distractor of the present utility model effectively solves the problems of unstable positioning, cumbersome operation, and lack of automatic locking function of traditional distractors through magnet positioning, automatic locking, and flexible pin joint plate design, significantly improving the operation efficiency and safety during oral surgery and examination. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the present utility model;

[0032] Figure 2 is a schematic structural diagram of the first connecting rod of the present utility model;

[0033] Figure 3Structural schematic diagram of the positioning arc bar of the present utility model;

[0034] Figure 4 Structural schematic diagram of the second connecting rod of the present utility model;

[0035] Figure 5 Structural schematic diagram of the locking assembly of the present utility model;

[0036] Figure 6 Structural schematic diagram of the cushion block of the present utility model.

[0037] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0038] 1. First connecting rod; 11. First pin joint plate; 111. First pin joint hole; 12. First finger ring; 13. Positioning groove; 131. Threaded groove; 14. Second pin joint plate; 141. Second pin joint hole;

[0039] 2. Positioning arc bar; 21. Positioning teeth; 22. Connecting plate; 221. Connecting hole;

[0040] 3. Second connecting rod; 31. Third pin joint plate; 311. Third pin joint hole; 32. Second finger ring; 33. Through groove; 34. Positioning seat; 35. Fourth pin joint plate; 351. Fourth pin joint hole;

[0041] 4. Locking assembly; 41. Driving plate; 411. Positioning column; 42. Locking plate; 43. Elastic member; 44. Knuckle piece; 45. Anti-slip block; 451. Anti-slip pattern;

[0042] 5. Cushion block; 51. Anti-slip strip; 52. Fifth pin joint plate; 521. Fifth pin joint hole; 53. Magnet. Detailed implementation manners

[0043] In order to make the purpose and advantages of the present utility model clearer, the present utility model will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present utility model, and does not strictly limit the specific protection scope claimed by the present utility model.

[0044] Refer to Figures 1-6, A retractor for maxillofacial surgery, comprising a first connecting rod 1 and a second connecting rod 3. The first connecting rod 1 and the second connecting rod 3 are arranged oppositely, and the first connecting rod 1 and the second connecting rod 3 are rotatably connected by a pin; One end of each of the first connecting rod 1 and the second connecting rod 3 is rotatably connected with a cushion block 5. The cushion block 5 is connected to the connecting rod through a pin connecting plate to ensure that it can always fit with the teeth during the retracting process; A fifth pin connecting plate 52 is fixedly connected to the bottom of the cushion block 5. A fifth pin hole 521 is formed through the side of the fifth pin connecting plate 52, so as to realize flexible connection with the second pin connecting plate 14 and the fourth pin connecting plate 35; A magnet 53 is fixedly connected below one end of the cushion block 5. In the initial state, the magnet 53 will adsorb on the first connecting rod 1 and the second connecting rod 3 to position the cushion block 5 and prevent shaking; Anti-slip strips 51 are evenly distributed on the top of the cushion block 5, increasing the friction with the teeth and preventing sliding; The other ends of the first connecting rod 1 and the second connecting rod 3 are respectively fixedly connected with a first finger ring 12 and a second finger ring 32. By applying force with the fingers, the maxillofacial region can be retracted.

[0045] A positioning arc strip 2 is connected to the inner side of the first connecting rod 1. One end of the positioning arc strip 2 is fixedly connected with a connecting plate 22 adapted to the positioning groove 13. A through groove 33 is formed through the side of the second connecting rod 3; When the first finger ring 12 and the second finger ring 32 approach each other, the positioning arc strip 2 passes through the through groove 33; When the positioning arc strip 2 passes through the through groove 33, the locking assembly 4 can lock the position of the positioning arc strip 2; Positioning teeth 21 are evenly distributed on the outer side of the positioning arc strip 2 along its arc direction. The locking assembly 4 includes a driving plate 41. One end of the driving plate 41 is provided with a positioning post 411. Symmetric positioning seats 34 adapted to the positioning post 411 are formed on the side of the second connecting rod 3; A locking plate 42 is fixedly connected to the side of one end of the driving plate 41. The locking plate 42 can be engaged between adjacent positioning teeth 21, so as to lock the positioning arc strip 2 and ensure the stability of the retracted state; An elastic member 43 is fixedly connected to the other side of the driving plate 41. The elastic member 43 is arranged on the side of the driving plate 41 and realizes locking and releasing through elastic deformation; A handle member 44 is fixedly connected to the other end of the driving plate 41. An anti-slip block 45 is fixedly connected to the inner side of the handle member 44. Anti-slip lines 451 are evenly formed on the anti-slip block 45, which is convenient for the operator to forcefully pull when unlocking is required.

[0046] Refer to Figures 1-4, on the outer side of the bent part of the first connecting rod 1, first pin-connecting plates 11 are symmetrically and fixedly connected. A first pin-connecting hole 111 is formed through the side surface of the first pin-connecting plate 11; on the midline of the outer side of the bent part of the second connecting rod 3, a third pin-connecting plate 31 is fixedly connected. A third pin-connecting hole 311 corresponding to the first pin-connecting hole 111 is formed through the side surface of the third pin-connecting plate 31; by passing a pin through the first pin-connecting hole 111 and the third pin-connecting hole 311, the rotational connection between the first connecting rod 1 and the second connecting rod 3 is realized, ensuring the stability and flexibility of each component during the spreading process.

[0047] Refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 , at one end of the first connecting rod 1, second pin-connecting plates 14 are symmetrically and fixedly connected. A second pin-connecting hole 141 is formed through the side surface of the second pin-connecting plate 14; at one end of the second connecting rod 3, fourth pin-connecting plates 35 are symmetrically and fixedly connected. A fourth pin-connecting hole 351 is formed through the side surface of the fourth pin-connecting plate 35; at the bottom of the cushion block 5, a fifth pin-connecting plate 52 is fixedly connected. A fifth pin-connecting hole 521 is formed through the side surface of the fifth pin-connecting plate 52, thereby realizing the flexible connection with the second pin-connecting plate 14 and the fourth pin-connecting plate 35, ensuring that the cushion block 5 can always be in contact with the teeth during the spreading process.

[0048] Refer to Figures 2-3 , a positioning groove 13 is formed on the side surface of the first connecting rod 1. Threaded grooves 131 are symmetrically formed at the bottom of the positioning groove 13. A connection hole 221 corresponding to the threaded groove 131 is formed through the upper end surface of the connecting plate 22. By passing a screw through the connection hole 221 and the threaded groove 131, the fixed connection between the positioning arc bar 2 and the first connecting rod 1 is realized, ensuring the stability of the positioning arc bar 2 during use.

[0049] Refer to Figure 5 , the locking assembly 4 includes a driving plate 41. A positioning post 411 is arranged at one end of the driving plate 41. Positioning seats 34 adapted to the positioning post 411 are symmetrically formed on the side surface of the second connecting rod 3; a locking plate 42 is fixedly connected to one end side surface of the driving plate 41. The locking plate 42 can be clamped between adjacent positioning teeth 21; an elastic member 43 is fixedly connected to the other side of the driving plate 41. The elastic member 43 is arranged on the side surface of the driving plate 41 and realizes locking and releasing through elastic deformation; a handle member 44 is fixedly connected to the other end of the driving plate 41. An anti-slip block 45 is fixedly connected to the inner side of the handle member 44. Anti-slip lines 451 are evenly formed on the anti-slip block 45, facilitating the operator to forcefully pull when unlocking is required, thereby realizing the quick unlocking of the positioning arc bar 2.

[0050] Through the above design, the maxillofacial distractor of the present invention not only has a simple structure and convenient operation, but also can keep the cushion block 5 in contact with the teeth during use, prevent shaking, and provide a stable distraction effect; the design of the positioning arc strip 2 and the locking component 4 realizes the stable locking and quick unlocking of the distraction angle, improving the operation efficiency and safety.

[0051] The working principle of the present utility model is as follows:

[0052] During use, insert the thumb and middle finger into the second finger ring 32 and the first finger ring 12 respectively, and insert the end where the cushion block 5 is located into the oral cavity, while making the two cushion blocks 5 abut against the teeth respectively;

[0053] Then, the middle finger and the thumb exert force to make the first finger ring 12 and the second finger ring 32 approach each other. During this process, the distance between the two cushion blocks 5 will increase, and thus the maxillofacial region can be distracted;

[0054] By rotatably connecting the two cushion blocks 5 with the second pin-connected plate 14 and the fourth pin-connected plate 35 respectively, during the process of distracting the maxillofacial region, the cushion block 5 can always be in contact with the teeth; and by arranging a magnet 53 below one end of the cushion block 5, in the initial state, the magnet 53 will adsorb on the first connecting rod 1 and the second connecting rod 3, thereby positioning the position of the cushion block 5, so as to avoid shaking of the cushion block 5 when it is placed inside the oral cavity;

[0055] As the first finger ring 12 and the second finger ring 32 approach each other, the positioning arc strip 2 will pass through the through groove 33;

[0056] The elastic member 43 arranged on the side of the driving plate 41 will make the locking plate 42 fit with the positioning teeth 21. Thus, when the thumb and the middle finger stop exerting force, under the mutual engagement of the locking plate 42 and the positioning teeth 21, the position of the positioning arc strip 2 will be fixed, and then the opening and closing angle between the first connecting rod 1 and the second connecting rod 3 will be positioned;

[0057] When it is necessary to release the locking, just use the index finger to pull the anti-sliding block 45. As the anti-sliding block 45 is stressed, the elastic member 43 will undergo elastic deformation, and the locking plate 42 will be separated from the positioning teeth 21, so that the locking of the positioning arc strip 2 can be released.

[0058] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model are implemented according to the conventional means in the art without special description and limitation.

Claims

1. A maxillofacial surgery distractor, characterized in that: The invention comprises a first connecting rod (1) and a second connecting rod (3), wherein the first connecting rod (1) and the second connecting rod (3) are arranged opposite to each other and are rotatably connected to each other via a pin; One end of the first connecting rod (1) and the second connecting rod (3) are both rotatably connected to a cushion block (5), and the other ends thereof are respectively fixedly connected to a first finger ring (12) and a second finger ring (32); The inner side of the first connecting rod (1) is connected to a positioning arc strip (2), and the side surface of the second connecting rod (3) is penetrated by a through groove (33); When the first finger ring (12) and the second finger ring (32) are brought closer to each other, the positioning arc strip (2) passes through the through slot (33); The outer side of the second connecting rod (3) is rotatably connected to a locking assembly (4), and when the positioning arc bar (2) passes through the through groove (33), the locking assembly (4) can lock the position of the positioning arc bar (2).

2. The maxillofacial surgery distractor according to claim 1, characterized in that: A first pin connection plate (11) is symmetrically fixedly connected to the outer side of the bending part of the first connecting rod (1), and a first pin connection hole (111) is penetrated through the side surface of the first pin connection plate (11); A third pin connection plate (31) is fixedly connected to the outer midline of the bending portion of the second connecting rod (3), and a third pin connection hole (311) corresponding to the first pin connection hole (111) is formed through the side surface of the third pin connection plate (31).

3. The maxillofacial surgery distractor according to claim 1, characterized in that: One end of the first connecting rod (1) is symmetrically fixedly connected to a second pin-connecting plate (14), and a second pin-connecting hole (141) is formed through a side surface of the second pin-connecting plate (14); One end of the second connecting rod (3) is symmetrically fixedly connected to a fourth pin-connecting plate (35), and a fourth pin-connecting hole (351) is formed through a side surface of the fourth pin-connecting plate (35); A fifth pin-connecting plate (52) is fixedly connected to the bottom of the cushion block (5), and a fifth pin-connecting hole (521) is formed through the side surface of the fifth pin-connecting plate (52).

4. The maxillofacial surgery distractor according to claim 1, characterized in that: A magnet (53) is fixedly connected below one end of the cushion block (5).

5. The maxillofacial surgery distractor according to claim 4, characterized in that: Anti-slip strips (51) are evenly distributed on the top of the cushion block (5).

6. The maxillofacial surgery distractor according to claim 1, characterized in that: A positioning groove (13) is provided on the side of the first connecting rod (1), and one end of the positioning arc bar (2) is fixedly connected to a connecting plate (22) adapted to the positioning groove (13); The bottom of the positioning groove (13) is symmetrically provided with a thread groove (131), and the upper end surface of the connecting plate (22) is penetrated by a connecting hole (221) corresponding to the thread groove (131).

7. The maxillofacial surgery distractor according to claim 1, characterized in that: The locking assembly (4) comprises a driving plate (41), one end of the driving plate (41) is provided with a positioning column (411), and a positioning seat (34) adapted to the positioning column (411) is symmetrically provided on a side surface of the second connecting rod (3).

8. The maxillofacial surgery distractor according to claim 7, characterized in that: A locking plate (42) is fixedly connected to the side surface of one end of the driving plate (41), and positioning teeth (21) are evenly spaced on the outer side of the positioning arc strip (2) along its arc direction, and the locking plate (42) can be engaged between adjacent positioning teeth (21).

9. The maxillofacial surgery distractor according to claim 8, characterized in that: An elastic member (43) is fixedly connected to the other side of the driving plate (41).

10. The maxillofacial surgery distractor according to claim 9, characterized in that: The other end of the driving plate (41) is fixedly connected to a hand buckle (44), the inner side of the hand buckle (44) is fixedly connected to an anti-sliding block (45), and the anti-sliding block (45) is evenly provided with anti-slip grooves (451).

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