Unidirectionally adjustable trephine with ratchet device

Abstract

A one-way adjustable trephine with a ratchet device is characterized by comprising a handle, an inserting part, a limiting part, a mounting part, a ratchet, an inner connecting table body, a connecting shaft, a connecting rod, an inserting block and a connecting body, the inserting part is connected to the lower portion of the handle, the limiting part is connected to the inserting part, the mounting part is arranged on the limiting part, and the ratchet is connected to the inner connecting table body. A ratchet wheel and an inner connecting table body are arranged on the mounting part, a connecting shaft and a connecting rod are arranged between the handle and the inner connecting table body, an inserting block is arranged on the connecting shaft, and a connecting body is arranged on the connecting rod. According to the trephine, when a doctor uses the trephine for an orthopedic operation, the trephine can only rotate in one direction, the rotation direction of the doctor when the trephine is used is standardized, the doctor can only rotate the trephine in one direction, so that the strength is saved, and the affected part of a patient can be better operated.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic ring saws, in particular to a ring saw with a ratchet device which can be adjusted in one direction. Background Art

[0002] The trephine is a surgical instrument used by orthopedics to remove bone growths in locations such as the intervertebral foramen to avoid diseases such as nerve compression. The trephine currently used in clinical practice is a metal round tube, the main structure of which is made of hollow medical 304 or 316 stainless steel that is corrosion-resistant and high-temperature resistant. One end is provided with a handle for rotational operation, and the other end is provided with saw teeth for grinding bone growths. Before surgery, imaging methods are required to locate the site of bone lesions such as the site of intervertebral disc compression. After the patient is anesthetized in the prone position, the trephine insertion site is marked on the back of the body surface. After the diseased vertebra is exposed, the trephine is inserted vertically into the body surface, rotated, and ground to remove bone growths to relieve nerve compression.

[0003] When using the existing common ring saw, especially when rotating, if there is an operating error, the ring saw will rotate in the opposite direction, which will not only affect the surgical effect, but also waste the orthopedic surgeon's effort due to the reverse rotation of the ring saw during rotation, thereby affecting the progress and quality of the orthopedic surgery. Therefore, we propose an orthopedic ring saw that can only rotate in one direction. Utility Model Content

[0004] In view of the above existing technical problems, the utility model provides a unidirectionally adjustable ring saw with a ratchet device, characterized in that it comprises a handle, an insertion portion, a limiting portion, a mounting portion, a ratchet, an internal platform, a connecting shaft, a connecting rod, an insert block, and a connecting body, wherein the handle is connected with the insertion portion at the bottom, the insertion portion is connected with the limiting portion at the top, the limiting portion is provided with a mounting portion, the mounting portion is provided with a ratchet and an internal platform, a connecting shaft and a connecting rod are provided between the handle and the internal platform, the connecting shaft is provided with an insert block, and the connecting rod is provided with a connecting body;

[0005] The inner platform is located inside the ratchet and lower than the ratchet. A slide groove is provided on the inner platform. The end of the connecting rod is inserted into the slide groove. A sawtooth groove is provided inside the ratchet for inserting an insert block therein.

[0006] The connecting body is made of elastic material.

[0007] Beneficial effects of the utility model:

[0008] The utility model inserts the entity into the affected part of the patient, and the doctor holds the handle, and when the doctor rotates the tool along the sawtooth groove direction of the ratchet, the inserting block is stuck in the sawtooth groove and cannot rotate.

[0009] When the doctor rotates the tool in the direction opposite to the sawtooth groove of the ratchet, the connecting shaft and the connecting rod rotate with the handle, and the plug block and the connecting body connected to the connecting shaft and the connecting rod also rotate in the opposite direction. During the reverse rotation, the plug block will be compressed by the protruding part of the edge of the sawtooth groove inside the ratchet, and then the connecting body connected to the plug block will also be compressed due to its certain elasticity. Therefore, the plug block rotates out of the sawtooth groove inside the ratchet during the reverse rotation. When the plug block rotates out to the sawtooth groove inside the next ratchet, the compressed connecting body with a certain elasticity is no longer compressed and will pop out together with the end of the plug block, so that it can be inserted into the next sawtooth groove. In this case, the doctor will still be stuck in the sawtooth groove if he rotates along the sawtooth groove, but can still rotate against the sawtooth groove, thereby realizing the one-way adjustment direction of the ring saw and then realizing its one-way rotation.

[0010] The utility model adds a ratchet structure to an existing common ring saw, so that when a doctor uses the ring saw for orthopedic surgery, the doctor can only rotate it in one direction, standardizes the rotation direction of the ring saw when the doctor uses it, and saves energy because the doctor can only rotate the ring saw in one direction, thereby better performing surgery on the patient's affected part. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of a ring saw with a ratchet device that can be adjusted in one direction according to the utility model;

[0012] Figure 2 It is a side view of the partial structure of a ring saw with a ratchet device that can be adjusted in one direction according to the utility model;

[0013] Figure 3 This is a partial structural detail diagram of a unidirectionally adjustable ring saw with a ratchet device according to the utility model;

[0014] As shown in the figure: 1. handle, 2. insertion part, 3. limiting part, 4. installation part, 5. ratchet, 501, serrated groove, 6. internal platform, 601, slide groove, 7. connecting shaft, 8. connecting rod, 9. plug block, 10. connector. DETAILED DESCRIPTION

[0015] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] Example 1

[0019] As shown in the figure, a unidirectionally adjustable ring saw with a ratchet device is characterized in that it includes a handle 1, an insertion portion 2, a limiting portion 3, a mounting portion 4, a ratchet 5, an internal platform 6, a connecting shaft 7, a connecting rod 8, an insert block 9, and a connecting body 10. The handle 1 is connected to the insertion portion 2 below, the insertion portion 2 is connected to the limiting portion 3 above, the limiting portion 3 is provided with the mounting portion 4, the mounting portion 4 is provided with the ratchet 5 and the internal platform 6, the connecting shaft 7 and the connecting rod 8 are provided between the handle 1 and the internal platform 6, the connecting shaft 7 is provided with the insert block 9, and the connecting rod 8 is provided with the connecting body 10;

[0020] The inner platform 6 is located inside the ratchet 5 and lower than the ratchet 5. A slide groove 601 is provided on the inner platform 6. The end of the connecting rod 8 is inserted into the slide groove 601. A sawtooth groove 501 is provided inside the ratchet 5 for inserting the insert block 9.

[0021] The connecting body 10 is made of elastic material.

[0022] Example 2

[0023] When using the utility model, the entity is inserted into the patient's affected part, and the handle 1 is held by the doctor. When the doctor rotates the tool along the direction of the sawtooth groove 501 of the ratchet 5, the insert block 9 is stuck in the sawtooth groove 501 and cannot rotate;

[0024] When the doctor rotates the tool in the direction opposite to the sawtooth groove 501 of the ratchet 5, the connecting shaft 7 and the connecting rod 8 rotate with the handle 1, and the plug block 9 and the connecting body 10 connected to the connecting shaft 7 and the connecting rod 8 also rotate in the reverse direction. During the reverse rotation, the plug block 9 is compressed by the protruding portion of the edge of the sawtooth groove 501 inside the ratchet 5, and then the connecting body 10 connected to the plug block 9 is also compressed due to a certain elasticity, so that the plug block 9 rotates out of the sawtooth groove 501 inside the ratchet 5 during the reverse rotation. When the plug block 9 rotates out to the sawtooth groove 501 inside the next ratchet 5, the compressed connecting body 10 with a certain elasticity is no longer compressed and will pop out together with the end of the plug block 9, so that it can be inserted into the next sawtooth groove 501. In this case, the doctor will still be stuck in the sawtooth groove 501 if he rotates in the same direction as the sawtooth groove 501, but can still rotate in the opposite direction as the sawtooth groove 501, thereby realizing the unidirectional adjustment direction of the ring saw and then realizing its unidirectional rotation.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A ring saw with a ratchet device that can be adjusted in one direction, characterized in that It includes a handle, an insertion part, a limiting part, a mounting part, a ratchet, an internal platform, a connecting shaft, a connecting rod, an insert block, and a connecting body. The handle is connected to the insertion part below, the insertion part is connected to the limiting part above, the limiting part is provided with a mounting part, the mounting part is provided with a ratchet and an internal platform, a connecting shaft and a connecting rod are provided between the handle and the internal platform, the connecting shaft is provided with an insert block, and the connecting rod is provided with a connecting body; The inner platform is located inside the ratchet and lower than the ratchet. A slide groove is provided on the inner platform. The end of the connecting rod is inserted into the slide groove. A sawtooth groove is provided inside the ratchet for inserting an insert block therein.

2. A unidirectionally adjustable ring saw with a ratchet device according to claim 1, characterized in that: The connecting body is made of elastic material.

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