Adjustable depth-setting bone drill

Abstract

The utility model relates to the technical field of medical instruments, in particular to an adjustable depth-setting bone drill which comprises a drill bit assembly, a depth limiting assembly, an adjusting assembly and an adjusting pipe, the drill bit assembly comprises a drill bit and a drill handle connected with the drill bit, the drill bit is arranged in the depth limiting assembly in a penetrating mode, and the adjusting pipe is arranged in the depth limiting assembly. The depth limiting assembly is used for limiting the exposed length of the drill bit, and one end of the depth limiting assembly is inserted into the adjusting assembly; the drill handle is sleeved with the adjusting pipe, the adjusting pipe is arranged in the adjusting assembly in a penetrating mode, and the adjusting assembly slides on the adjusting pipe to drive the depth limiting assembly to slide so as to adjust the exposed length of the drill bit. According to the adjustable depth-setting bone drill, sliding of the depth limiting pipe and the supporting sleeve in the depth limiting assembly can be achieved by operating the operating sleeve, then the distance between the end face of the end, close to the drill bit, of the supporting sleeve and the end of the drill bit is controlled, the drilling depth is adjusted, and operation is flexible and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an adjustable depth bone drill. Background Art

[0002] During the treatment of orthopedic diseases, it is sometimes necessary to drill holes in bones. Among traditional instruments, most of the instruments used for orthopedic drilling are manual drills. Manual drills have a simple structure, but are time-consuming and labor-intensive to use, and have low drilling efficiency. Long drilling times increase the discomfort of patients.

[0003] In order to solve the problem of low efficiency of manual drilling in the prior art, electric bone drills are designed. However, most of the electric bone drills in the prior art are fixed drill bits, and their drilling depths are mostly fixed and cannot be adjusted. Drilling in different parts or with different drilling depth requirements can only be achieved by using electric bone drills with drill bits of different lengths. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an adjustable depth bone drill, which can flexibly adjust the drilling depth according to surgical needs and is flexible and convenient to use.

[0005] The utility model solves the above technical problems through the following technical means:

[0006] The utility model provides an adjustable depth-setting bone drill, comprising a drill bit assembly, the adjustable depth-setting bone drill also comprising a depth-limiting assembly, an adjusting assembly and an adjusting tube, the drill bit assembly comprising a drill bit and a drill shank connected to the drill bit, the drill bit being inserted into the depth-limiting assembly, the depth-limiting assembly being used to limit the exposed length of the drill bit, one end of the depth-limiting assembly being plugged into the adjusting assembly; the adjusting tube being sleeved on the drill shank, the adjusting tube being inserted into the adjusting assembly, the adjusting assembly sliding on the adjusting tube drives the depth-limiting assembly to slide, and thus adjusts the exposed length of the drill bit.

[0007] In some embodiments, the depth limiting assembly includes a depth limiting tube, one end of the depth limiting tube away from the drill bit is fixedly inserted in the adjustment assembly, the depth limiting tube is slidably sleeved on one end of the adjustment tube, the adjustment tube has a limiting groove, a limiting block is installed on the depth limiting tube, and the limiting block is slidably set in the limiting groove.

[0008] In some embodiments, the depth limiting assembly further comprises a support sleeve, which is slidably mounted on the drill bit assembly, and one end of the support sleeve is inserted into the depth limiting tube and slides with the sliding of the depth limiting tube.

[0009] In some embodiments, the adjustment component includes a steel ball mounting sleeve, a steel ball and an operating sleeve, the steel ball mounting sleeve has a steel ball through hole, the steel ball is inserted into the steel ball through hole, the outer wall of the adjustment tube has a plurality of steel ball ring grooves, the steel balls are adapted to the steel ball ring grooves, and the inner wall of the operating sleeve has a ball pressing block, the ball pressing block presses the steel ball in the corresponding steel ball ring groove for locking the depth limit component.

[0010] In some embodiments, a limit ring and a stop sleeve are provided at one end of the operating sleeve near the drill bit, the limit ring fixed sleeve is provided on the steel ball mounting sleeve, the stop sleeve sliding sleeve is provided on the limit ring, the limit ring is used to limit excessive sliding of the stop sleeve, the stop sleeve is fixed inside the operating sleeve, a spring mounting cavity is provided in the operating sleeve, a spring is provided on the steel ball mounting sleeve, and the spring is located in the spring mounting cavity.

[0011] In some embodiments, a retaining ring is provided on the outer wall of the limiting ring, and the retaining ring is used to prevent the retaining sleeve from excessively sliding in a direction close to the drill bit.

[0012] In some embodiments, a support tube is further sleeved on the drill shank, and the support tube is located inside the adjustment tube.

[0013] In some embodiments, the adjustable depth bone drill further includes a handle, and the adjustment tube and the drill handle are both inserted into the handle.

[0014] The adjustable depth-setting bone drill of the utility model, on the one hand, can realize the sliding of the depth-limiting tube and the support sleeve in the depth-limiting assembly by operating the operating sleeve, thereby controlling the distance between the end face of the support sleeve close to one end of the drill bit and the end of the drill bit, thereby realizing the adjustment of the drilling depth, and the operation is flexible and convenient. On the other hand, through the cooperation of the steel ball with the steel ball ring groove on the adjustment tube and the pressure ball block on the inner wall of the operating sleeve, the depth-limiting assembly can be locked to prevent it from sliding, thereby realizing the limiting control of the drilling depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the explosion structure of the adjustable depth bone drill of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the adjustable depth bone drill of the utility model;

[0017] Figure 3 It is a cross-sectional schematic diagram of the adjustable depth bone drill of the utility model;

[0018] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 5 It is a schematic diagram of the enlarged structure of the regulating tube;

[0020] Among them, the drill bit 110, the drill handle 120, the depth limiting tube 210, the limiting block 211, the mounting hole 212, the support sleeve 220, the steel ball mounting sleeve 310, the steel ball through hole 311, the second retaining wall 312, the steel ball 320, the operating sleeve 330, the ball pressing block 331, the first retaining wall 332, the limiting ring 340, the retaining ring 341, the retaining sleeve 350, the spring 360, the adjusting tube 400, the limiting groove 410, the steel ball ring groove 420, the spring mounting cavity 500, the support tube 600, the handle 700, the input tube 800, and the bearing 900. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0022] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] Please refer to Figure 1-5 The adjustable depth-fixed bone drill of the utility model includes a drill bit assembly, a depth-limiting assembly, an adjusting assembly and an adjusting tube 400. The drill bit assembly includes a drill bit 110 and a drill shank 120 connected to the drill bit 110. The drill bit 110 is inserted into the depth-limiting assembly. The depth-limiting assembly is used to limit the exposed length of the drill bit 110. One end of the depth-limiting assembly is plugged into the adjusting assembly; the adjusting tube 400 is sleeved on the drill shank 120. The adjusting tube 400 is inserted into the adjusting assembly. The adjusting assembly slides on the adjusting tube 400 to drive the depth-limiting assembly to slide and then adjust the exposed length of the drill bit 110, thereby realizing the adjustment of the drilling depth of the bone drill.

[0024] The depth limiting assembly includes a depth limiting tube 210, one end of the depth limiting tube 210 away from the drill bit 110 is fixedly inserted in the adjustment assembly, the depth limiting tube 210 is slidably sleeved on one end of the adjustment tube 400, the adjustment tube 400 is provided with a limiting groove 410, a limiting block 211 is installed on the depth limiting tube 210, and the limiting block 211 is slidably arranged in the limiting groove 410. Specifically, a mounting hole 212 is provided on the depth limiting tube 210, one end of the limiting block 211 is inserted in the mounting hole 212, and the other end slides in the limiting groove 410. Through the limiting cooperation of the limiting block 211 and the limiting groove 410, part of the drill bit 110 is always exposed outside the depth limiting assembly during the sliding process of the depth limiting tube 210 on the adjustment tube 400, so as to avoid excessive sliding of the depth limiting tube 210 on the adjustment tube 400, resulting in the drill bit 110 being completely located in the depth limiting assembly and unable to drill a hole.

[0025] The depth limiting assembly further includes a support sleeve 220, which is slidably mounted on the drill bit 110 assembly, and one end of the support sleeve 220 is inserted into the depth limiting tube 210 and slides with the sliding of the depth limiting tube 210. The distance between the end surface of the support sleeve 220 close to the drill bit 110 and the tip of the drill bit 110 constitutes the drilling depth of the bone drill, so the sliding of the depth limiting tube 210 can drive the sliding of the support sleeve 220 to achieve the adjustment of the drilling depth.

[0026] The adjustment component includes a steel ball mounting sleeve 310, a steel ball 320 and an operating sleeve 330. The steel ball mounting sleeve 310 has a steel ball through hole 311, and the steel ball 320 is inserted into the steel ball through hole 311. The outer wall of the adjustment tube 400 has a plurality of steel ball ring grooves 420, and the steel ball 320 is adapted to the steel ball ring grooves 420. The inner wall of the operating sleeve 330 has a ball pressing block 331, and the ball pressing block 331 presses the steel ball 320 into the corresponding steel ball ring groove 420 for locking the depth limit component. A limit ring 340 and a stopper sleeve 350 are provided at one end of the operating sleeve 330 near the drill bit 110. The limit ring 340 is fixedly sleeved on the steel ball mounting sleeve 310, and the stopper sleeve 350 is slidably sleeved on the limit ring 340. The limit ring 340 is used to limit excessive sliding of the stopper sleeve 350. The stopper sleeve 350 is fixed inside the operating sleeve 330. A spring mounting cavity 500 is provided inside the operating sleeve 330. A first stopper wall 332 is also provided on the inner wall of the operating sleeve 330. A second stopper wall 312 is fixed on the outer wall of the steel ball mounting sleeve 310. A spring 360 is sleeved on the steel ball mounting sleeve 310. The spring 360 is located in the spring mounting cavity 500. One end of the spring 360 contacts the stopper sleeve 350, and the other end contacts the first stopper wall 332 and the second stopper wall 312 of the operating sleeve 330. A retaining ring 341 is provided on the outer wall of the limiting ring 340 , and the retaining ring 341 is used to prevent the retaining sleeve 350 from excessively sliding in a direction close to the drill bit 110 .

[0027] When the drilling depth needs to be adjusted, the operating sleeve 330 is slid. During the sliding process, the ball pressing block 331 slides with the operating sleeve 330, disengages from the steel ball, the spring is compressed, and the stop sleeve 350 slides on the limit sleeve. When the stop sleeve 350 and the stop ring are not able to slide anymore, at this time, the operating sleeve 330 continues to slide in the same direction, driving the limit ring 340 to slide, and then driving the steel ball mounting sleeve 310 to slide. The sliding of the steel ball mounting sleeve 310 drives the steel ball 320 to slide on the adjusting tube 400. At the same time, the depth limiting tube 210 and the supporting sleeve 220 slide. When the drill bit 110 exposes a suitable length (required drilling depth), the steel ball 320 is partially embedded in the corresponding steel ball ring groove 420. At this time, the operating sleeve 330 is released, and the operating sleeve 330 is reset under the action of the spring. The ball pressing block 331 presses the steel ball in the corresponding steel ball ring groove 420 to prevent the depth limiting component from sliding during the drilling process to achieve locking of the drilling depth. The arrangement of multiple steel ball ring grooves 420 can achieve the adjustment of various drilling depths while providing a sense of adjustment gears.

[0028] The drill handle 120 is also sleeved with a support tube 600, which is located in the adjustment tube 400. In order to connect the power mechanism, the drill handle 120 is generally set to be relatively long, which is easy to shake during the drilling process, affecting the drilling effect, and the support tube 600 can support and stabilize the drill handle 120, thereby alleviating its shaking during the drilling process.

[0029] The adjustable depth bone drill of this embodiment further includes a handle 700, and the adjustment tube 400 and the drill handle 120 are both inserted into the handle 700. An input tube 800 is provided in the handle 700, one end of the input tube 800 is connected to the external power mechanism, the other end of the input tube 800 is inserted into the adjustment tube 400, a bearing 900 is installed between the other end of the input tube 800 and the adjustment tube 400, and one end of the drill handle 120 away from the drill bit 110 is fixedly inserted into the input tube 800, and the rotation of the input tube 800 drives the drill handle 120 to rotate, thereby driving the drill bit 110 to achieve drilling.

[0030] The adjustable depth bone drill of this embodiment, when the drilling depth needs to be increased, the operating sleeve 330 is slid in the direction away from the drill bit 110. During the sliding process, the ball pressing block 331 gradually separates from the steel ball, and the spring is gradually compressed. The sliding of the operating sleeve 330 will drive the steel ball installation sleeve 310 to slide synchronously, and the depth limiting tube 210 and the support sleeve 220 slide along with the sliding of the steel ball installation sleeve 310. The steel ball is separated from the steel ball ring groove 420. When sliding to the appropriate drilling depth, the steel ball is partially embedded in the corresponding steel ball ring groove 420, and the operating sleeve 330 is released. Under the restoring force of the spring 360, the operating sleeve 330 is reset to the ball pressing block 331 to press the steel ball. Similarly, when the drilling depth needs to be reduced, the operating sleeve 330 is slid in the direction close to the drill bit 110 to achieve the sliding of the depth limiting tube 210 and the support sleeve 220, thereby achieving the reduction adjustment of the drilling depth.

[0031] The adjustable depth bone drill of the utility model, on the one hand, can realize the sliding of the depth limiting tube 210 and the support sleeve 220 in the depth limiting assembly by operating the operating sleeve 330, thereby controlling the distance between the end face of one end of the support sleeve 220 close to the drill bit 110 and the end of the drill bit 110, thereby realizing the adjustment of the drilling depth, and the operation is flexible and convenient. On the other hand, through the cooperation of the steel ball with the steel ball ring groove 420 on the adjustment tube 400 and the ball pressing block 331 on the inner wall of the operating sleeve 330, the depth limiting assembly can be locked to prevent it from sliding, thereby realizing the limiting control of the drilling depth.

[0032] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. An adjustable depth bone drill, comprising a drill bit assembly, characterized in that: The adjustable depth bone drill also includes a depth limiting component, an adjustment component and an adjustment tube. The drill bit assembly includes a drill bit and a drill shank connected to the drill bit. The drill bit is inserted into the depth limiting component. The depth limiting component is used to limit the exposed length of the drill bit. One end of the depth limiting component is inserted into the adjustment component; the adjustment tube is sleeved on the drill shank, and the adjustment tube is inserted into the adjustment component. The adjustment component slides on the adjustment tube to drive the depth limiting component to slide and thereby adjust the exposed length of the drill bit.

2. The adjustable depth bone drill according to claim 1, characterized in that: The depth limiting assembly includes a depth limiting tube, the end of the depth limiting tube away from the drill bit is fixedly inserted in the adjustment assembly, the depth limiting tube is slidably sleeved on one end of the adjustment tube, the adjustment tube has a limiting groove, a limiting block is installed on the depth limiting tube, and the limiting block is slidably set in the limiting groove.

3. The adjustable depth bone drill according to claim 2, characterized in that: The depth limiting assembly further comprises a support sleeve, which is slidingly sleeved on the drill bit assembly. One end of the support sleeve is inserted into the depth limiting tube and slides along with the sliding of the depth limiting tube.

4. The adjustable depth bone drill according to claim 1, characterized in that: The adjustment assembly includes a steel ball mounting sleeve, a steel ball and an operating sleeve. The steel ball mounting sleeve has a steel ball through-hole, and the steel ball is inserted into the steel ball through-hole. The outer wall of the adjustment tube has multiple steel ball ring grooves, and the steel balls are adapted to the steel ball ring grooves. The inner wall of the operating sleeve has a ball pressing block, and the ball pressing block presses the steel balls in the corresponding steel ball ring grooves to lock the depth limit assembly.

5. The depth-adjustable bone drill according to claim 4, characterized in that: A limit ring and a stop sleeve are provided in the operating sleeve at one end close to the drill bit. The limit ring fixed sleeve is provided on the steel ball mounting sleeve, and the stop sleeve sliding sleeve is provided on the limit ring. The limit ring is used to limit excessive sliding of the stop sleeve. The stop sleeve is fixed inside the operating sleeve. A spring mounting cavity is provided in the operating sleeve. A spring is provided on the steel ball mounting sleeve, and the spring is located in the spring mounting cavity.

6. The adjustable depth bone drill according to claim 5, characterized in that: A retaining ring is provided on the outer wall of the limiting ring, and the retaining ring is used to prevent the retaining sleeve from excessively sliding in a direction close to the drill bit.

7. The adjustable depth bone drill according to claim 1, characterized in that: A support tube is also sleeved on the drill handle, and the support tube is located in the adjusting tube.

8. The depth-adjustable bone drill according to any one of claims 1 to 7, characterized in that: The adjustable depth bone drill further comprises a handle, in which the adjusting tube and the drill shank are both inserted.

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