Reamers with split body

Abstract

The utility model relates to medical instrument technical field especially relates to a kind of opening and closing type reamer device, it includes: handle, outer sleeve, push-pull rod and reamer body. Outer sleeve has hollow structure, and outer sleeve is connected with handle, it has hinged part;Push-pull rod is movably arranged in the hollow structure of outer sleeve along outer sleeve axial direction, and the one end of push-pull rod has driving part;The first end of reamer body is hinged with hinged part, and its second end is connected with driving part, and reamer body is driven around hinged part to do opening and closing movement by the axial movement of push-pull rod.The utility model provides a kind of opening and closing type reamer device, push-pull rod and outer sleeve adopt inside and outside nesting structure, and push-pull rod can move along axial direction relative to outer sleeve, and axial movement is carried out by operating push-pull rod, and then drive reamer body around hinged part to realize opening and closing movement.The utility model's opening and closing type reamer device can realize the telescopic of head blade, is convenient to use, adapts different clinical needs, and improves operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an opening and closing reamer device. Background Technology

[0002] Spinal diseases, especially herniated and prolapsed discs, are particularly prevalent in modern society. Interbody fusion surgery has unique advantages in treating lumbar disc herniation, spinal stenosis, and spinal nerve decompression, achieving minimally invasive surgery. In spinal fusion surgery, the intervertebral disc needs to be removed first, a process that utilizes instruments such as reamers, curettes, scalpels, and bone scalpels.

[0003] Existing reamers are all fixed structures with non-adjustable angles, making them inconvenient to use and difficult to adapt to different clinical situations. They require the replacement of different reamer instruments, resulting in low surgical efficiency. Utility Model Content

[0004] This utility model provides an opening and closing reamer device to solve the defects of existing reamers, which are all fixed structures with non-adjustable angles, inconvenient to use, and have low surgical efficiency.

[0005] This utility model provides an opening and closing type reamer device, including: handle; The outer tube has a hollow structure, and one end of the outer tube is connected to the handle, while the other end has a hinge. A push-pull rod is movably disposed within the hollow structure of the outer sleeve along the axial direction of the outer sleeve, and one end of the push-pull rod has a driving part; The reamer body has a first end hinged to the hinge part and a second end connected to the drive part. The axial movement of the push-pull rod drives the reamer body to perform opening and closing movements around the hinge part.

[0006] According to the opening and closing type reamer device provided by this utility model, the push-pull rod has a first threaded portion; The opening and closing reamer device also includes: An inner connecting rod, wherein a second threaded portion is formed at one end of the inner connecting rod near the push-pull rod, and the second threaded portion engages with the first threaded portion; A knob is connected to the end of the inner connecting rod away from the push-pull rod and is exposed on the outside of the outer sleeve, used to drive the inner connecting rod to rotate synchronously.

[0007] According to the opening and closing reamer device provided by this utility model, the driving part includes: An extrusion body, having a first inclined surface, is located at the end of the push-pull rod away from the handle; The reamer body has a second inclined surface, which is adapted to contact the first inclined surface.

[0008] According to the opening and closing reamer device provided by this utility model, the reamer body has multiple blades; The extrusion body has a plurality of first positioning grooves formed thereon, and the blade is at least partially inserted into the first positioning grooves.

[0009] According to the opening and closing type reamer device provided by this utility model, a second positioning groove is formed on the blade; The opening and closing reamer device also includes: An annular fixing bracket is located on the outside of the push-pull rod. The annular fixing bracket is provided with a positioning boss, which is adapted to be inserted into the second positioning groove.

[0010] According to the opening and closing reamer device provided by this utility model, the driving part includes: The reamer drive frame is equipped with a positioning post; The reamer body has a groove, the extension direction of which is inclined to the movement direction of the push-pull rod, and the positioning pin is inserted into the groove and can move within the groove.

[0011] According to the opening and closing type reamer device provided by this utility model, a guide hole is provided at the end of the outer tube away from the handle; The drive unit also includes: A guide screw is located at the end of the reamer drive frame away from the handle and is movably inserted into the guide hole to guide the movement direction of the reamer drive frame.

[0012] The opening and closing reamer device provided by this utility model further includes: A limiting device is provided on the handle and extends through the outer sleeve and the inner connecting rod to axially limit the inner connecting rod.

[0013] According to the opening and closing reamer device provided by this utility model, the limiting device includes: At least two limiting posts are provided, and through holes are provided on both the handle and the outer sleeve, and the limiting posts are inserted into the through holes; A limiting groove is provided at one end of the inner connecting rod near the handle, and the limiting post is adapted to be inserted into the limiting groove.

[0014] According to the opening and closing reamer device provided by this utility model, the limiting groove is an annular groove, and two limiting posts are provided and symmetrically arranged in the annular groove.

[0015] This utility model provides an opening and closing reamer device, comprising: a handle, an outer tube, a push-pull rod, and a reamer body. The outer tube has a hollow structure, with one end connected to the handle and the other end having a hinge. The push-pull rod is movably disposed within the hollow structure of the outer tube along its axial direction, and one end of the push-pull rod has a driving part. The first end of the reamer body is hinged to the hinge, and the second end is connected to the driving part. The axial movement of the push-pull rod drives the reamer body to open and close around the hinge. In this opening and closing reamer device, the push-pull rod and the outer tube adopt an inner and outer nested structure. The push-pull rod can move axially relative to the outer tube. By operating the push-pull rod to move axially, the reamer body is driven to open and close around the hinge. This opening and closing reamer device allows for the extension and retraction of the cutting edge, facilitating use, adapting to different clinical needs, and improving surgical efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the opening and closing reamer device provided in Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the outer sleeve, push-pull rod, reamer body, inner connecting rod, extrusion body and annular fixing frame provided in Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the push-pull rod, reamer body, inner connecting rod, extrusion body, and annular fixing frame provided in Embodiment 1 of this utility model.

[0020] Figure 4 This is a cross-sectional view of the outer sleeve, push-pull rod, reamer body, inner connecting rod, extrusion body, and annular fixing frame provided in Embodiment 1 of this utility model.

[0021] Figure 5 This is a schematic diagram of the push-pull rod and extrusion body provided in Embodiment 1 of this utility model.

[0022] Figure 6 This is a schematic diagram of one of the blades of the reamer body and the annular fixing frame provided in Embodiment 1 of this utility model.

[0023] Figure 7This is a schematic diagram of the structure of one of the blades of the reamer body provided in Embodiment 1 of this utility model.

[0024] Figure 8 This is a schematic diagram of the overall structure of the opening and closing reamer device provided in Embodiment 2 of this utility model.

[0025] Figure 9 This is a schematic diagram of the reamer body and outer sleeve provided in Embodiment 2 of this utility model.

[0026] Figure 10 This is a schematic diagram of the structure of the reamer drive frame, reamer body, guide screw and inner connecting rod provided in Embodiment 2 of this utility model.

[0027] Figure 11 This is a cross-sectional view of the reamer drive frame, push-pull rod, reamer body, guide screw and inner connecting rod provided in Embodiment 2 of this utility model.

[0028] Figure 12 This is a schematic diagram of the reamer body provided in Embodiment 2 of this utility model.

[0029] Figure 13 This is a schematic diagram of the limiting device, handle, and knob in one embodiment of the present invention.

[0030] Figure 14 This is a schematic diagram of the structural relationship between the limiting post, the limiting groove, and the knob in one embodiment of this utility model.

[0031] Figure label: 1: Handle; 2: Outer tube; 21: Guide hole; 3: Push-pull rod; 31: First threaded part; 4: Reamer body; 41: Second positioning groove; 42: Second inclined surface; 43: Slide groove; 5: Knob; 6: Inner connecting rod; 61: Second threaded part; 62: Limiting groove; 7: Extrusion body; 71: First inclined surface; 72: First positioning groove; 8: Annular fixing frame; 81: Positioning boss; 9: Reamer drive frame; 91: Positioning post; 10: Guide screw; 11: Limiting device; 111: Limiting post. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this embodiment.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this embodiment, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this embodiment, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0036] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] The following is combined with Figures 1-14 This invention describes an opening and closing reamer device. The opening and closing reamer device includes: a handle 1, an outer sleeve 2, a push-pull rod 3, and a reamer body 4.

[0038] The outer sleeve 2 has a hollow structure, and one end of the outer sleeve 2 is connected to the handle 1, while the other end has a hinge. The push-pull rod 3 is movably disposed in the hollow structure of the outer sleeve 2 along the axial direction of the outer sleeve 2, and one end of the push-pull rod 3 has a drive part. The first end of the reamer body 4 is hinged to the hinge part, and its second end is connected to the drive part. The axial movement of the push-pull rod 3 drives the reamer body 4 to perform opening and closing movements around the hinge part.

[0039] Specifically, the handle 1 and the reamer body 4 are located at opposite ends of the outer sleeve 2. The handle 1 is fixedly connected to the outer sleeve 2, while the reamer body 4 is hinged to the outer sleeve 2, allowing the reamer body 4 to open and retract. The push-pull rod 3 is axially movable relative to the outer sleeve 2 and the handle 1, serving as the power source for the opening and retraction of the reamer body 4. It drives the second end of the reamer body 4 to rotate via the drive unit. Since the outer sleeve 2 remains stationary, the hinged part acts as the rotation center of the reamer body 4, enabling the reamer body 4 to open and close around its first end.

[0040] In use, the handle 1 is for medical staff to hold; the push-pull rod 3 and the outer tube 2 adopt an inner and outer nested structure. The push-pull rod 3 can move axially relative to the outer tube 2. By operating the push-pull rod 3 to move axially, the reamer body 4 is driven to open and close around the hinge.

[0041] Optionally, depending on actual needs, the reamer body 4 can be a double-edged reamer or a four-edged reamer. Both are controlled by rotating the knob 5 at the tail to extend or retract the head blade, thus enabling small cuts to solve large problems.

[0042] This utility model provides an opening and closing reamer device, comprising: a handle 1, an outer tube 2, a push-pull rod 3, and a reamer body 4. The outer tube 2 has a hollow structure, with one end connected to the handle 1 and the other end having a hinge. The push-pull rod 3 is axially movably disposed within the hollow structure of the outer tube 2, and one end of the push-pull rod 3 has a driving part. The first end of the reamer body 4 is hinged to the hinge, and the second end is connected to the driving part. The axial movement of the push-pull rod 3 drives the reamer body 4 to open and close around the hinge. In this opening and closing reamer device, the push-pull rod 3 and the outer tube 2 adopt an inner and outer nested structure. The push-pull rod 3 can move axially relative to the outer tube 2. By operating the push-pull rod 3 to move axially, the reamer body 4 is driven to open and close around the hinge. This opening and closing reamer device allows for the extension and retraction of the cutting edge, facilitating use, adapting to different clinical needs, and improving surgical efficiency.

[0043] In one embodiment of this utility model, the push-pull rod 3 has a first threaded portion 31. The opening and closing reamer device further includes: an inner connecting rod 6 and a knob 5; the end of the inner connecting rod 6 near the push-pull rod 3 has a second threaded portion 61, which engages with the first threaded portion 31; the knob 5 is connected to the end of the inner connecting rod 6 away from the push-pull rod 3 and is exposed on the outside of the outer sleeve 2, used to drive the inner connecting rod 6 to rotate synchronously. In this embodiment, the knob 5 is operated by medical personnel, and rotating the knob 5 can drive the inner connecting rod 6 to rotate synchronously. The inner connecting rod 6 and the push-pull rod 3 are connected by threads, and the rotation of the inner connecting rod 6 is converted into the axial movement of the push-pull rod 3 through the threaded structure, and its movement principle is similar to that of a lead screw mechanism. It can be understood that the push-pull rod 3 only performs axial movement and does not perform rotational movement.

[0044] This utility model provides two structural embodiments: one is a four-sided blade reamer (Embodiment 1), and the other is a double-sided blade reamer (Embodiment 2).

[0045] Example 1: like Figures 1 to 7 As shown, preferably, the driving unit includes: a pressing body 7 having a first inclined surface 71 and located at the end of the push-pull rod 3 away from the handle 1; and a reamer body 4 having a second inclined surface 42 adapted to contact the first inclined surface 71. Specifically, the pressing body 7 is fixed to the end of the push-pull rod 3, and the push-pull rod 3 drives the pressing body 7 to move axially. The pressing body 7 contacts the second inclined surface 42 of the reamer body 4 through its first inclined surface 71, pressing and pushing out from the inside of the reamer body 4, causing the reamer body 4 to rotate and open.

[0046] Preferably, the reamer body 4 has multiple blades; the extrusion body 7 has multiple first positioning grooves 72 formed therein, and the blades are at least partially inserted into the first positioning grooves 72. In this embodiment, the reamer body 4 has four blades, each blade having a 90° angle between them, forming a four-sided reamer structure. The first inclined surface 71 of the extrusion body 7 has four first positioning grooves 72 formed therein, and the edges of the blades can be inserted into the first positioning grooves 72 to position the blades and prevent blade displacement.

[0047] Preferably, a second positioning groove 41 is formed on the blade; the opening and closing reamer device further includes: an annular fixing frame 8, located outside the push-pull rod 3, the annular fixing frame 8 having positioning bosses 81, the positioning bosses 81 being adapted to engage with the second positioning grooves 41. In this embodiment, the annular fixing frame 8 is provided with four positioning bosses 81, the engagement of the four positioning bosses 81 with the four blade second positioning grooves 41 prevents the blade from shaking during use.

[0048] Example 2: like Figures 8 to 12As shown, preferably, the drive unit includes: a reamer drive frame 9, which is provided with a positioning post 91. The reamer body 4 has a groove 43, the extension direction of which is inclined to the movement direction of the push-pull rod 3. The positioning post 91 is inserted into the groove 43 and can move within the groove 43. Specifically, the reamer drive frame 9 is fixed on the push-pull rod 3, and the positioning post 91 provided thereon is inserted into the groove 43 of the reamer body 4. Since the groove 43 is inclined, the opening and closing direction of the reamer body 4 is limited by the cooperation between the groove 43 and the positioning post 91; the opening and closing movement of the reamer body 4 is driven by the movement of the positioning post 91 within the groove 43.

[0049] Preferably, a guide hole 21 is provided at the end of the outer tube 2 away from the handle 1; the drive unit further includes a guide screw 10, which is located at the end of the reamer drive frame 9 away from the handle 1 and is movably inserted into the guide hole 21 to guide the movement direction of the reamer drive frame 9. Specifically, the guide hole 21 extends axially along the outer tube 2, and the guide pin is fixedly connected to the reamer drive frame 9. By limiting the guide pin through the guide hole 21, the movement of the reamer drive frame 9 is guided, ensuring its axial movement is accurate.

[0050] In one embodiment of this utility model, such as Figure 13 As shown, the opening and closing reamer device further includes a limiting device 11, which is disposed on the handle 1 and passes through the outer sleeve 2 and the inner connecting rod 6 to axially limit the inner connecting rod 6. In this embodiment, by using the limiting device 11 to pass through the outer sleeve 2 and the inner connecting rod 6, only the inner connecting rod 6 is axially limited, without restricting its rotational movement.

[0051] In one embodiment of this utility model, such as Figure 14 As shown, the limiting device 11 includes at least two limiting posts 111 and a limiting groove 62. Both the handle 1 and the outer sleeve 2 have through holes, into which the limiting posts 111 are inserted. The limiting groove 62 is located at the end of the inner connecting rod 6 near the handle 1, and the limiting posts 111 are adapted to be inserted into the limiting groove 62. Specifically, the limiting posts 111 are inserted into the through holes of the handle 1 and the outer sleeve 2 along the tangential direction of the outer sleeve 2, and then into the limiting groove 62, limiting the axial movement of the inner connecting rod 6. However, during the rotation of the inner connecting rod 6, the limiting posts 111 can slide within the limiting groove 62 without restricting the rotational movement of the inner connecting rod 6.

[0052] In one embodiment of this utility model, the limiting groove 62 is an annular groove, with two limiting posts 111 symmetrically arranged within the annular groove. Specifically, the limiting groove 62 adopts an annular groove structure, with two limiting posts 111 located at the top and bottom of the annular groove respectively, to ensure the axial limiting effect on the inner connecting rod 6.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A retractable reamer device, characterized in that, include: Handle (1); The outer tube (2) has a hollow structure, and one end of the outer tube (2) is connected to the handle (1), and the other end has a hinge. The push-pull rod (3) is movably disposed in the hollow structure of the outer sleeve (2) along the axial direction of the outer sleeve (2), and one end of the push-pull rod (3) has a driving part; The reamer body (4) has a first end hinged to the hinge part and a second end connected to the drive part. The axial movement of the push-pull rod (3) drives the reamer body (4) to open and close around the hinge part.

2. The opening and closing reamer device according to claim 1, characterized in that, The push-pull rod (3) has a first threaded portion (31); The opening and closing reamer device also includes: An inner connecting rod (6) has a second threaded portion (61) formed at one end near the push-pull rod (3), and the second threaded portion (61) engages with the first threaded portion (31). The knob (5) is connected to the end of the inner connecting rod (6) away from the push-pull rod (3) and exposed on the outside of the outer tube (2) to drive the inner connecting rod (6) to rotate synchronously.

3. The opening and closing reamer device according to claim 2, characterized in that, The drive unit includes: The extrusion body (7) has a first inclined surface (71) and is located at the end of the push-pull rod (3) away from the handle (1); The reamer body (4) has a second inclined surface (42) that is adapted to contact the first inclined surface (71).

4. The opening and closing reamer device according to claim 3, characterized in that, The reamer body (4) has multiple blades; The extrusion body (7) has a plurality of first positioning grooves (72) formed thereon, and the blade is at least partially inserted into the first positioning grooves (72).

5. The opening and closing reamer device according to claim 4, characterized in that, A second positioning groove (41) is formed on the blade. The opening and closing reamer device also includes: The annular fixing frame (8) is located outside the push-pull rod (3). The annular fixing frame (8) is provided with a positioning boss (81), which is adapted to be inserted into the second positioning groove (41).

6. The opening and closing reamer device according to claim 2, characterized in that, The drive unit includes: The reamer drive frame (9) is equipped with a positioning column (91); The reamer body (4) has a groove (43) extending in a direction that is inclined to the direction of movement of the push-pull rod (3). The positioning pin (91) is inserted into the groove (43) and can move within the groove (43).

7. The opening and closing reamer device according to claim 6, characterized in that, A guide hole (21) is provided at one end of the outer tube (2) away from the handle (1); The drive unit also includes: A guide screw (10) is provided at one end of the reamer drive frame (9) away from the handle (1) and is movably inserted into the guide hole (21) to guide the movement direction of the reamer drive frame (9).

8. The opening and closing reamer device according to any one of claims 2 to 7, characterized in that, Also includes: A limiting device (11) is provided on the handle (1) and passes through the outer sleeve (2) and the inner connecting rod (6) to axially limit the inner connecting rod (6).

9. The opening and closing reamer device according to claim 8, characterized in that, The limiting device (11) includes: At least two limiting posts (111) are provided with through holes on the handle (1) and the outer sleeve (2), and the limiting posts (111) are inserted into the through holes; A limiting groove (62) is provided at one end of the inner connecting rod (6) near the handle (1), and the limiting post (111) is adapted to be inserted into the limiting groove (62).

10. The opening and closing reamer device according to claim 9, characterized in that, The limiting groove (62) is an annular groove, and two limiting posts (111) are provided symmetrically within the annular groove.

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