Unidirectionally adjustable bone drill with ratchet device

Abstract

The bone drill comprises a bone drill body and further comprises a limiting mechanism, the limiting mechanism is arranged at the drill bit installation end of the bone drill body, and the limiting mechanism comprises a positioning sleeve, an installation sleeve, a ratchet wheel, a rotating shaft, clamping teeth, a screw hole, an inserting rod and a spring. A positioning sleeve is arranged at the end of the bone drill body, a mounting sleeve for clamping a drill bit is arranged at one end of the positioning sleeve, in the normal use state, the stud is separated from the screw hole, the spring jacks the clamping teeth to be attached to the periphery of the ratchet wheel, at the moment, the ratchet wheel and the mounting sleeve can only be screwed in one direction, and the drill bit is clamped and fixed; the reverse rotation of the mounting sleeve is avoided, and the falling problem cannot occur under the condition that the drill bit suddenly stops.

Description

Technical Field

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

[0002] A bone drill is an electric tool used to drill holes in bones during surgery. It is suitable for providing mechanical power to perform bone tissue surgery. Its main feature is high-speed rotation, which can drill holes quickly and accurately. Bone drills are usually made of stainless steel and have good corrosion resistance and durability. They are widely used in orthopedic and surgical diagnosis and treatment.

[0003] The existing bone drills have the following disadvantages during use: the drill bit of the existing bone drills is fixed to the mounting end of the bone drill by adopting a traditional twisting self-locking structure. In actual use, especially when the drill bit suddenly stops drilling due to a hard object, it is easy to cause the drill bit to fall off, affecting the surgical process. For this reason, we propose a bone drill with a ratchet device that can be adjusted in one direction. Utility Model Content

[0004] The main purpose of the utility model is to provide a bone drill with a ratchet device that can be adjusted in one direction. By setting a limiting mechanism at the power end of the bone drill body, the drill bit can be stably fixed and clamped to avoid falling off, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A bone drill with a ratchet device that can be adjusted in one direction comprises a bone drill body and a limiting mechanism. The limiting mechanism is arranged at the drill bit mounting end of the bone drill body, and the limiting mechanism comprises a positioning sleeve, a mounting sleeve, a ratchet, a rotating shaft, a clamping tooth, a screw hole, an insertion rod and a spring. A positioning sleeve is arranged at the end of the bone drill body, and a mounting sleeve for clamping the drill bit is arranged at one end of the positioning sleeve. A ratchet is arranged at one end of the outer wall of the mounting sleeve located inside the positioning sleeve, and a clamping tooth is movably connected to one side of the inner wall of the positioning sleeve through a rotating shaft. A screw hole is opened inside the positioning sleeve near one side of the clamping tooth, and an insertion rod with an outer diameter smaller than the inner diameter of the screw hole is horizontally inserted inside the screw hole, and a spring is installed between the inner wall of the positioning sleeve and the surface of the clamping tooth.

[0007] Furthermore, a handle is fixedly connected to one side of the bottom of the bone drill body, and a control switch connected to the control end of the bone drill body is installed on the surface of the handle; the bone drill body is held by the handle and operated by the control switch controller.

[0008] Furthermore, a cavity is provided inside the latch tooth on one side facing the spring, and a connecting ring located inside the cavity is installed at the end of the insertion rod; the connecting ring is inside the cavity, so that the insertion rod can be smoothly twisted.

[0009] Furthermore, a stud matching the screw hole is integrally formed at the middle portion of the outer portion of the insertion rod; the stud structure can cooperate with the screw hole to fix the insertion rod structure.

[0010] Furthermore, a groove is provided on one side of the surface of the positioning sleeve and the end of the insertion rod is located inside the groove; the groove structure prevents the end of the insertion rod from protruding.

[0011] Compared with the prior art, the utility model has the following beneficial effects: a ratchet structure is provided at one end of the outer periphery of the installation sleeve located inside the positioning sleeve. Under normal use, the stud is separated from the screw hole, and the spring pushes the locking teeth to fit the outer periphery of the ratchet. At this time, the ratchet and the installation sleeve can only be twisted in one direction to achieve clamping and fixing of the drill bit. After clamping in place, the ratchet is restricted by the locking teeth to avoid reversal of the installation sleeve, and the drill bit will not fall off when it stops suddenly. When it needs to be removed, the insertion rod can be pulled outward, and when the stud hits the screw hole, the insertion rod is twisted to screw the stud into the screw hole. At this time, the spring is compressed, and the locking teeth are away from the ratchet, so it can be easily rotated to release the clamping of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the overall structure of a bone drill with a ratchet device that can be adjusted in one direction.

[0013] Figure 2 The utility model is a schematic diagram of the connection structure of the ratchet and the positioning sleeve of a bone drill with a ratchet device that can be adjusted in one direction.

[0014] Figure 3 The utility model is a bone drill with a ratchet device that can be adjusted in one direction Figure 2 Enlarged structural diagram at A in the middle.

[0015] In the figure: 1. bone drill body; 2. limiting mechanism; 201. positioning sleeve; 202. mounting sleeve; 203. ratchet; 204. rotating shaft; 205. latching teeth; 206. screw hole; 207. insertion rod; 208. cavity; 209. connecting ring; 210. spring; 211. stud; 212. groove; 3. handle; 4. control switch. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] like Figure 1-3As shown, a bone drill with a ratchet device that can be adjusted in one direction includes a bone drill body 1 and a limiting mechanism 2. The limiting mechanism 2 is provided at the drill bit mounting end of the bone drill body 1. The limiting mechanism 2 includes a positioning sleeve 201, a mounting sleeve 202, a ratchet 203, a rotating shaft 204, a clamping tooth 205, a screw hole 206, an insertion rod 207 and a spring 210. The end of the bone drill body 1 is provided with a positioning sleeve 201 and one end of the positioning sleeve 201 is provided with a mounting sleeve for clamping the drill bit. 202, a ratchet 203 is installed on one end of the outer wall of the installation sleeve 202 located inside the positioning sleeve 201, and a latch tooth 205 is movably connected to one side of the inner wall of the positioning sleeve 201 through a rotating shaft 204, a screw hole 206 is opened on one side of the positioning sleeve 201 near the latch tooth 205, and an insertion rod 207 with an outer diameter smaller than the inner diameter of the screw hole 206 is horizontally inserted inside the screw hole 206, and a spring 210 is installed between the inner wall of the positioning sleeve 201 and the surface of the latch tooth 205.

[0018] Among them, a handle 3 is fixedly connected to one side of the bottom of the bone drill body 1, and a control switch 4 connected to the control end of the bone drill body 1 is installed on the surface of the handle 3; the bone drill body 1 is held by the handle 3 and operated by the control switch 4 controller.

[0019] A cavity 208 is provided inside the latch tooth 205 on the side facing the spring 210 , and a connecting ring 209 located inside the cavity 208 is installed at the end of the insertion rod 207 ; the connecting ring 209 is inside the cavity 208 , so that the insertion rod 207 can be smoothly twisted.

[0020] Among them, a stud 211 matching the screw hole 206 is integrally formed at the middle position of the outer part of the insertion rod 207, a groove 212 is opened on one side of the surface of the positioning sleeve 201 and the end of the insertion rod 207 is located inside the groove 212; the stud 211 structure can cooperate with the screw hole 206 to fix the insertion rod 207 structure, and the groove 212 structure prevents the end of the insertion rod 207 from protruding.

[0021] It should be noted that the utility model is a bone drill with a ratchet device that can be adjusted in one direction. When in use, the outer periphery of the mounting sleeve 202 is located inside the positioning sleeve 201 and a ratchet 203 structure is provided at one end. Under normal use conditions, the stud 211 is separated from the screw hole 206, and the spring 210 pushes the latch tooth 205 to fit the outer periphery of the ratchet 203. At this time, the ratchet 203 and the mounting sleeve 202 can only be twisted in one direction to achieve clamping and fixing the drill bit. After being clamped in place, the ratchet 203 is restricted by the latch tooth 205 to prevent the mounting sleeve 202 from reversing, and the drill bit will not fall off when it stops suddenly. When it needs to be removed, the insertion rod 207 can be pulled outward. When the stud 211 hits the screw hole 206, the insertion rod 207 is twisted to make the stud 211 screwed into the screw hole 206. At this time, the spring 210 is compressed, and the latch tooth 205 is away from the ratchet 203, which can be easily rotated to release the clamping of the drill bit.

[0022] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may 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 bone drill with a ratchet device that can be adjusted in one direction, comprising a bone drill body (1), characterized in that: The invention also comprises a limiting mechanism (2), wherein the drill bit mounting end of the bone drill body (1) is provided with the limiting mechanism (2), wherein the limiting mechanism (2) comprises a positioning sleeve (201), a mounting sleeve (202), a ratchet (203), a rotating shaft (204), a clamping tooth (205), a screw hole (206), an insertion rod (207) and a spring (210), wherein the end of the bone drill body (1) is provided with a positioning sleeve (201) and one end of the positioning sleeve (201) is provided with a mounting sleeve (202) for clamping the drill bit, wherein the mounting sleeve (20 2) A ratchet (203) is installed at one end of the outer wall located inside the positioning sleeve (201); a latching tooth (205) is movably connected to one side of the inner wall of the positioning sleeve (201) through a rotating shaft (204); a screw hole (206) is opened on one side of the positioning sleeve (201) close to the latching tooth (205); and an insertion rod (207) with an outer diameter smaller than the inner diameter of the screw hole (206) is inserted horizontally into the inner side of the screw hole (206); and a spring (210) is installed between the inner wall of the positioning sleeve (201) and the surface of the latching tooth (205).

2. A bone drill with a ratchet device that can be adjusted in one direction according to claim 1, characterized in that: A handle (3) is fixedly connected to one side of the bottom of the bone drill body (1), and a control switch (4) connected to the control end of the bone drill body (1) is installed on the surface of the handle (3).

3. The bone drill with a ratchet device that can be adjusted in one direction according to claim 1, characterized in that: A cavity (208) is provided inside the latching tooth (205) on the side facing the spring (210), and a connecting ring (209) located inside the cavity (208) is installed at the end of the insertion rod (207).

4. The bone drill with a ratchet device that can be adjusted in one direction according to claim 1, characterized in that: A stud (211) matching the screw hole (206) is integrally formed at the middle section of the outer portion of the insertion rod (207).

5. The bone drill with a ratchet device that can be adjusted in one direction according to claim 1, characterized in that: A groove (212) is provided on one side of the surface of the positioning sleeve (201), and the end of the insertion rod (207) is located inside the groove (212).

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