Angle-adjustable osteotome device

Abstract

The invention discloses an angle-adjustable osteotome device, relates to the technical field of medical instruments, and solves the technical problem that an existing angle-adjustable instrument cannot bear continuous knocking through a double anti-loosening structure of threaded connection and double-screw-head limiting. A screw rod of the control assembly is in threaded connection with the chisel rod and the chisel handle, and the angle can be preliminarily fixed through thread self-locking; meanwhile, two limiting plates of the limiting assembly penetrate through the through grooves of the double screw heads, the two screw heads form a mutual restriction structure through limiting of the limiting plates, when the hammer body continuously knocks the operation part, the screw heads cannot rotate due to vibration, loosening of threaded connection due to vibration is avoided, and through combination of abutting supporting of a top rotating shaft of the rotating assembly and an abutting head, the safety of the operation part is improved. The angle of the chisel head is always kept stable, angle deviation or abrupt change is avoided, the bone chiseling precision is effectively improved, and due to the fact that knocking acts on the position of the supporting ring, the limiting plate cannot achieve a bending structure in a rotating control state, and the bending structure is matched with the knocking action.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an adjustable-angle bone chisel device. Background Technology

[0002] Percutaneous endoscopic lumbar discectomy (PELD) has become an important surgical procedure in spinal surgery for treating conditions such as herniated discs and spinal stenosis due to its advantages of minimal trauma and rapid postoperative recovery. The bone chisel, as the main instrument for bone resection and access widening in this procedure, needs to be used in conjunction with the percutaneous endoscopic portal to complete the endoscopic operation. Its structural design affects surgical efficiency. Currently, most clinically used PELD bone chisels are one-piece straight structures. During operation, they need to be placed inside the endoscopic operating tube for bone cutting. Due to the small diameter of the percutaneous endoscopic portal and the limited range of motion in the surgical area, straight bone chisels can only perform chiseling movements around the percutaneous endoscope, making it difficult to reach bone tissue in more distant intervertebral spaces or around the intervertebral foramen. To expand the operating range, surgeons currently use forceps to bend the part of the bone chisel near the cutting edge, creating a fixed arc of 5-15°. However, due to the size of the percutaneous endoscopic portal, the bending angle is limited, requiring the chisel to remain within a small range to continue passing through the portal. If the bent bone chisel has a large arc, it is difficult to adapt to the portal space, leading to problems such as portal jamming. Although some existing minimally invasive surgical tools have adjustable angle designs, these designs are mostly suitable for instruments that do not require continuous impact, such as clamping and cutting. However, the working principle of a bone chisel is to continuously strike the tail of the instrument with a hammer, transmitting the impact force through the rod to the front chisel blade, thereby chiseling the bone tissue. Existing angle adjustment structures lack corresponding anti-loosening designs and usually use a clamping method for fixation. Under continuous impact and vibration, they are prone to loosening, resulting in angle deviation or inability to maintain the angle. The unstable chisel blade angle leads to arbitrary rotation, making subsequent bone chiseling work difficult and failing to guarantee the stability of the contact position between the chisel blade and the bone tissue. This not only reduces the accuracy of bone chiseling but may also cause damage to surrounding nerves and blood vessels due to sudden angle changes, increasing surgical risks. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, this invention provides an adjustable-angle bone chisel device. Under the premise of meeting the size limitations of the percutaneous endoscopic discectomy (PED) channel, the device is designed to be straight in its initial state when inserted through the channel, and can be angled after insertion, while maintaining angle stability under continuous hammering conditions.

[0004] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0005] An adjustable-angle bone chisel device includes an operating part, a transmission part, and an action part. The operating part includes a chisel handle, and a transmission part is connected to the upper side of the chisel handle. The transmission part includes a chisel rod, and an action part is provided on the chisel rod. The action part includes a chisel head, and a rotating assembly is provided between the chisel head and the chisel rod. The chisel handle is provided with a control assembly, and the control assembly cooperates with the rotating assembly. A limiting assembly is provided on the control assembly, and the limiting assembly cooperates with the control assembly.

[0006] Preferably, the rotating assembly of the operating part includes a top seat, a top rotating seat is fixedly connected to the lower side of the top seat, and a top rotating shaft is fixedly connected to the top rotating seat;

[0007] The upper end of the chisel rod is provided with a rod head, and an upper rotating frame is fixedly connected to the upper side of the rod head. The upper rotating frame is rotatably connected to the top rotating shaft.

[0008] Preferably, the top seat has abutment seats fixedly connected to both sides of the top rotating seat, the abutment seats are fixedly connected to the top seat, and the abutment seats have semi-circular grooves.

[0009] The control component includes a screw, and an abutment is fixedly connected to the upper end of the screw. The abutment is hemispherical and engages with the semi-circular groove of the abutment seat.

[0010] Preferably, the chisel handle is fixedly connected to the chisel rod, the screw is threadedly connected to the chisel rod and the chisel handle, the screw has a screw head fixedly connected to the lower end of the chisel handle, the screw head has a through groove, the through grooves on the two screw heads are correspondingly arranged, and a limiting component is provided in the through groove.

[0011] Preferably, the limiting component includes two limiting plates, with a lower rotating shaft between the two limiting plates. The first limiting plate is fixedly connected to a lower rotating seat near the lower rotating shaft, and the lower rotating seat is fixedly connected to the lower rotating shaft. The second limiting plate is fixedly connected to a lower rotating frame near the lower rotating shaft, and the lower rotating frame is rotatably connected to the lower rotating shaft. A lever is fixedly connected to the end of the limiting plate away from the lower rotating shaft.

[0012] Preferably, the axial height of the through groove at the screw head is greater than the thickness of the limiting plate.

[0013] Preferably, the length of the limiting component is greater than the diameter of one screw head, so that the limiting component can be placed in the through groove of the two screw heads. When the first screw head is vibrated and wants to rotate, it cannot rotate due to the cooperation of the limiting component with the second screw head, thus achieving the limiting effect.

[0014] Preferably, a support ring is fixedly connected to the end of the chisel handle away from the chisel rod, and the distance between the limiting plate and the support ring is equal to the width of the through groove; so that the space inside the support ring is sufficient to allow the limiting component to move into one of the through grooves, and the angle of the chisel head can be adjusted by adjusting the height of the abutment joints of the two screws.

[0015] Preferably, the thickness of the limiting plate is less than the gap between the two screw heads; this allows for adjustment by rotating the screw head half a turn and then rotating it again, without moving it.

[0016] Preferably, the upper end of the chisel head is provided with a chisel blade.

[0017] The beneficial effects of this invention are:

[0018] An adjustable-angle bone chisel device is disclosed. In its initial state, the chisel head and chisel rod are straight, allowing for smooth insertion through the narrow passage of a percutaneous endoscopic discectomy (PED). This solves the problems of jamming and obstructed vision when inserting a traditional bent bone chisel. After insertion, the screw of the control component drives the abutment to move along the semi-circular groove of the abutment seat. This, combined with the rotation of the top shaft of the rotating component and the upper rotating frame, allows for chisel head angle adjustment. This compensates for the blind spots that straight bone chisels cannot reach or are slightly off-target. Furthermore, the adjustment process requires no additional tools, and the surgeon can control the angle in real time through the screw head, improving the flexibility of the surgical operation.

[0019] This invention solves the technical problem that existing angle-adjustable instruments cannot withstand continuous impact by employing a dual anti-loosening structure of threaded connection and double-screw head limiting. The screw of the control component is threadedly connected to the chisel rod and chisel handle, and the angle can be initially fixed through thread self-locking. At the same time, the two limiting plates of the limiting component pass through the through slots of the double screw heads. By using the limiting plates to limit the two screw heads, a mutually restrictive structure is formed. When the hammer continuously strikes the operating part, the screw heads cannot rotate due to vibration, avoiding loosening of the threaded connection due to vibration. Combined with the abutment support of the top rotating shaft of the rotating component and the abutment joint, it is ensured that the chisel head angle remains stable during the process of the impact force being transmitted to the chisel blade through the chisel rod and rotating component, without angle deviation or sudden change, effectively improving the bone chiseling accuracy. Furthermore, because the impact is applied at the position of the support ring, the limiting plate cannot achieve the bending structure of the rotation control state, which is in harmony with the impact action itself.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the adjustable-angle bone chisel device according to an embodiment of the present invention;

[0023] Figure 2 This is a partial structural connection diagram of the adjustable-angle bone chisel device according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the chisel head and top seat according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the chisel rod and screw rod according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the rod head and top seat according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the chisel handle, chisel rod, and chisel head according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the chisel handle and screw head according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the screw head and limiting plate described in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the limiting plate described in an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the structure of the chisel handle, screw head, and limiting plate described in an embodiment of the present invention;

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1-Chisel handle, 101-Support ring, 110-Screw head, 111-Through groove, 120-Limiting plate, 121-Lower rotating seat, 122-Lower rotating shaft, 123-Lower rotating frame, 124-Pulley, 2-Chisel rod, 201-Rod head, 202-Upper rotating frame, 210-Screw rod, 211-Abutting joint, 3-Chisel head, 301-Chisel blade, 310-Top seat, 311-Top rotating seat, 312-Top rotating shaft, 313-Abutting seat, 314-Semi-circular groove. Detailed Implementation

[0034] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0035] like Figures 1 to 10 As shown, this embodiment of the present disclosure provides an adjustable angle bone chisel device, including an operating part, a transmission part, and an action part. The operating part includes a chisel handle (1), and a transmission part is connected to the upper side of the chisel handle (1). The transmission part includes a chisel rod (2), and an action part is provided on the chisel rod (2). The action part includes a chisel head (3). A rotating component is provided between the chisel head (3) and the chisel rod (2). A control component is provided on the chisel handle (1). The control component cooperates with the rotating component. A limiting component is provided on the control component. The limiting component cooperates with the control component.

[0036] The rotating assembly of the operating part includes a top seat (310), a top rotating seat (311) is fixedly connected to the lower side of the top seat (310), and a top rotating shaft (312) is fixedly connected to the top rotating seat (311).

[0037] The upper end of the chisel rod (2) is provided with a rod head (201), and an upper rotating frame (202) is fixedly connected to the upper side of the rod head (201). The upper rotating frame (202) is rotatably connected to the top rotating shaft (312).

[0038] The top seat (310) has abutment seats (313) fixedly connected to both sides of the top rotating seat (311). The abutment seats (313) are fixedly connected to the top seat (310), and a semi-circular groove (314) is opened on the abutment seats (313).

[0039] like Figures 4 to 10 As shown, the control component includes a screw (210), and an abutment (211) is fixedly connected to the upper end of the screw (210). The abutment (211) is hemispherical and abuts against the semicircular groove (314) of the abutment seat (313).

[0040] The chisel handle (1) is fixedly connected to the chisel rod (2), and the screw rod (210) is threadedly connected to the chisel rod (2) and the chisel handle (1). The screw rod (210) has a screw head (110) fixedly connected to the lower end of the chisel handle (1). The screw head (110) has a through groove (111). The through grooves (111) of the screw heads (110) on the two screw rods (210) are correspondingly arranged. A limiting component is provided in the through groove (111).

[0041] like Figure 8 , Figure 9 As shown, the limiting assembly includes a limiting plate (120), and there are two limiting plates (120). A lower rotating shaft (122) is provided between the two limiting plates (120). A lower rotating seat (121) is fixedly connected to the first limiting plate (120) near the lower rotating shaft (122). The lower rotating seat (121) is fixedly connected to the lower rotating shaft (122). A lower rotating frame (123) is fixedly connected to the second limiting plate (120) near the lower rotating shaft (122). The lower rotating frame (123) is rotatably connected to the lower rotating shaft (122). A lever (124) is fixedly connected to the end of the limiting plate (120) away from the lower rotating shaft (122).

[0042] The axial height of the through groove (111) at the screw head (110) is greater than the thickness of the limiting plate (120);

[0043] The length of the limiting component is greater than the diameter of one screw head (110), so that the limiting component can be placed in the through groove (111) of the two screw heads (110). When the first screw head (110) is vibrated and wants to rotate, it is prevented from rotating by the cooperation of the limiting component with the second screw head (110), thus achieving the limiting effect.

[0044] The end of the chisel handle (1) away from the chisel rod (2) is fixedly connected to a support ring (101). The distance between the limiting plate (120) and the support ring (101) is equal to the width of the through groove (111). This makes the space inside the support ring (101) sufficient to allow the limiting component to move into one of the through grooves (111). The angle of the chisel head (3) is adjusted by adjusting the height of the abutment joint (211) of the two screws (210).

[0045] The thickness of the limiting plate (120) is less than the gap between the two screw heads (110); so that, based on the control of the screw head (110) to rotate half a turn by the limiting plate (120) to move and then rotate, it is possible to adjust the full rotation without moving.

[0046] The upper end of the chisel (3) is provided with a chisel blade (301).

[0047] In summary, the present invention provides an adjustable-angle bone chisel device. In the initial state, the chisel head (3) and the chisel rod (2) are in a straight structure, which can smoothly pass through the narrow channel of the percutaneous endoscopic disc to complete the endoscopic operation. This solves the problem of easy jamming and obstruction of the field of vision when the traditional bent bone chisel is inserted into the endoscope. After insertion, the screw (210) of the control component drives the abutment (211) to move along the semi-circular groove (314) of the abutment seat (313). In conjunction with the rotation of the top rotating shaft (312) of the rotating component and the upper rotating frame (202), the angle of the chisel head (3) can be adjusted, which makes up for the blind spot of the operation that the straight bone chisel cannot reach or is slightly off. Moreover, no additional tools are required for the adjustment process. The surgeon can control the angle in real time through the screw head (110), which improves the flexibility of the surgical operation.

[0048] This invention solves the technical problem that existing angle-adjustable instruments cannot withstand continuous impact by using a double anti-loosening structure with threaded connection and double screw head (110) limiting. The screw (210) of the control component is threadedly connected to the chisel rod (2) and the chisel handle (1), and the angle can be initially fixed by the thread self-locking. At the same time, the two limiting plates (120) of the limiting component pass through the through slot (111) of the double screw head (110). By using the limiting plate (120) to limit, the two screw heads (110) form a mutually restrictive structure. When the hammer continuously strikes the operating part, the screw head (110) cannot rotate due to vibration, thus avoiding the loosening of the threaded connection due to vibration. Combined with the abutting support of the top rotating shaft (312) of the rotating component and the abutting joint (211), it is ensured that the angle of the chisel head (3) remains stable during the process of the impact force being transmitted to the chisel blade (301) through the chisel rod (2) and the rotating component. There will be no angle deviation or sudden change, which effectively improves the chiseling accuracy. Moreover, since the striking action is at the position of the support ring (101), the limiting plate (120) cannot achieve the bending structure in the rotation control state, which is in line with the striking action itself.

[0049] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An adjustable-angle bone chisel device, characterized in that: The device includes an operating part, a transmission part, and an action part. The operating part includes a chisel handle, and a transmission part is connected to the upper side of the chisel handle. The transmission part includes a chisel rod, and an action part is provided on the chisel rod. The action part includes a chisel head, and a rotating assembly is provided between the chisel head and the chisel rod. The chisel handle is provided with a control assembly, which cooperates with the rotating assembly. The control assembly is provided with a limiting assembly, which cooperates with the control assembly.

2. The adjustable-angle bone chisel device as described in claim 1, characterized in that: The rotating assembly of the operating part includes a top seat, a top rotating seat is fixedly connected to the lower side of the top seat, and a top rotating shaft is fixedly connected to the top rotating seat; The upper end of the chisel rod is provided with a rod head, and an upper rotating frame is fixedly connected to the upper side of the rod head. The upper rotating frame is rotatably connected to the top rotating shaft.

3. The adjustable-angle bone chisel device as described in claim 2, characterized in that: The top seat has abutment seats fixedly connected to both sides of the top rotating seat. The abutment seats are fixedly connected to the top seat, and semi-circular grooves are opened on the abutment seats. The control component includes a screw, and an abutment is fixedly connected to the upper end of the screw. The abutment is hemispherical and engages with the semi-circular groove of the abutment seat.

4. The adjustable-angle bone chisel device as described in claim 3, characterized in that: The chisel handle is fixedly connected to the chisel rod, and the screw is threadedly connected to the chisel rod and the chisel handle. A screw head is fixedly connected to the lower end of the chisel handle. The screw head has a through groove. The through grooves on the two screw heads are correspondingly arranged, and a limiting component is provided in the through groove.

5. The adjustable-angle bone chisel device as described in claim 4, characterized in that: The limiting assembly includes two limiting plates, with a lower rotating shaft between them. The first limiting plate is fixedly connected to a lower rotating seat near the lower rotating shaft, and the lower rotating seat is fixedly connected to the lower rotating shaft. The second limiting plate is fixedly connected to a lower rotating frame near the lower rotating shaft, and the lower rotating frame is rotatably connected to the lower rotating shaft. A lever is fixedly connected to the end of the limiting plate away from the lower rotating shaft.

6. The adjustable-angle bone chisel device as described in claim 5, characterized in that: The axial height of the through groove at the screw head is greater than the thickness of the limiting plate.

7. The adjustable-angle bone chisel device as described in claim 6, characterized in that: The length of the limiting component is greater than the diameter of a screw head.

8. The adjustable-angle bone chisel device as described in claim 7, characterized in that: A support ring is fixedly connected to the end of the chisel handle away from the chisel rod, and the distance between the limiting plate and the support ring is equal to the width of the through groove.

9. The adjustable-angle bone chisel device as described in claim 8, characterized in that: The thickness of the limiting plate is less than the gap between the two screw heads.

10. The adjustable-angle bone chisel device as described in claim 9, characterized in that: The upper end of the chisel head is equipped with a chisel blade.

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