Medical electric bone drill

Abstract

The utility model provides a medical electric bone drill which comprises a battery box, the upper portion of the battery box is detachably connected with a handle shell, a driving motor is arranged in the handle shell, a drill bit shell is arranged at the top of the handle shell, and a transmission device connected with the driving motor is arranged in the drill bit shell and the handle shell. A motor driving controller is fixed in the battery box, the motor driving controller is connected with a battery installed in the battery box in an inserted mode, and the motor driving controller is connected with a driving motor arranged in the handle shell through a detachable electrical connecting device; the motor driving controller is installed in the motor box, it is guaranteed that the driving controller does not participate in the disinfection process, the requirement for the overall sealing performance is lowered, it is avoided that aging of electronic components is accelerated due to long-term continuous high-temperature and high-pressure disinfection, and the service life of the motor driving controller can be prolonged; the motor driving controller is connected with the motor through a reliable elastic contact, so that poor contact is avoided, and use is not affected.

Description

Technical Field

[0001] This application relates to the field of orthopedic electric drills, specifically to a medical electric bone drill. Background Technology

[0002] A medical electric bone drill is a widely used medical device, primarily used in orthopedic surgery to drill holes in bones. It is mainly used in procedures such as fracture fixation, joint replacement, and bone biopsy. A medical electric bone drill generally consists of a motor, a drill bit, and a handle. The motor drives the drill bit to rotate, converting electrical energy into mechanical energy. When the drill bit comes into contact with the bone, the high-speed rotation of the drill bit generates friction and cutting force on the bone surface, gradually removing bone tissue and forming a hole.

[0003] To prevent cross-infection among patients, the spread of iatrogenic infections, and to comply with medical norms and safety standards, the electric bone drill needs to be disinfected after each surgery. Currently, the control part of the motor is usually installed inside the handle or drill bit. When the electric bone drill is disinfected, the motor also participates in high-temperature and high-pressure disinfection. This method places extremely strict requirements on the overall sealing of the bone drill, and the long-term continuous high-temperature and high-pressure disinfection accelerates the aging of electronic components and shortens the service life of the equipment.

[0004] For example, in a smart bone drill with application number 200920127085.4, a technical solution is disclosed, which involves setting a strain gauge torque sensor, a speed sensor, or a pressure sensor on a conventional bone drill motor; an embedded intelligent control module is also set on the bone drill motor to receive and judge the induction signals collected by the sensors, and control the bone drill motor. The beneficial technical effects of this utility model are: setting a speed sensor, torque sensor, and pressure sensor composed of a Hall sensor and a metal digital readout disk on the base of a conventional bone drill motor to measure and display the drill bit speed, torque, and pressure in real time, and realizing the determination of whether the drill bit has penetrated bone tissue through the three parameters, and realizing automatic drilling stop and reverse control; setting an ultrasonic transducer on the bone drill motor can accurately measure the drilling depth of the drill bit; through the above improvements, effective data can be provided to the surgeon during the operation and real-time reliable protection can be provided; this application combines Figure 2 As described above, the motor control unit is installed in the drill bit, and it faces the aforementioned technical problems during disinfection. The applicant intends to place the motor drive controller inside the battery box, which is not involved in the disinfection process. However, no relevant technical solutions were found after searching.

[0005] In summary, a new technical solution is needed to address the aforementioned technical problems. Utility Model Content

[0006] This application provides a medical electric bone drill, including a battery box, a handle housing detachably connected to the upper part of the battery box, a drive motor disposed inside the handle housing, a drill bit housing disposed at the top of the handle housing, a transmission device connected to the drive motor disposed inside the drill bit housing and the handle housing, a motor drive controller fixed inside the battery box, the motor drive controller being plugged into a battery installed in the battery box, and the motor drive controller being connected to the drive motor disposed inside the handle housing via a detachable electrical connection device.

[0007] As a preferred embodiment, the detachable electrical connection device includes a resilient contact that is connected to the motor drive controller and extends to the upper part of the battery box. The resilient contact engages with a pin that is fixedly mounted on the handle base plate. One end of the pin is connected to a PCB connection board, which is connected to the drive motor.

[0008] As a preferred embodiment, the transmission device includes a first bevel gear that meshes with a second bevel gear, the second bevel gear being connected to the output end of a drive motor, a rotating shaft mounted in the middle of the first bevel gear, the rotating shaft communicating with the end of the drill bit housing, and a drill bit mounting groove provided on one side of the drill bit located at the end of the drill bit housing.

[0009] As a preferred embodiment, the drill bit housing includes a body, a handle rear end cover is sealed on one side of the body, and a locking sleeve is installed on the other side of the body.

[0010] As a preferred embodiment, bearing one and bearing two are installed on the outer side of the rotating shaft. A shaft seal ring is installed on one side of bearing one on the rotating shaft, and a spacer is fitted on one side of the shaft seal ring on the rotating shaft with clearance. A bearing sleeve is connected to the outer side of the spacer, and a locking sleeve is provided at the connection between the outer side of the bearing sleeve and the drill bit housing.

[0011] As a preferred embodiment, a shock-absorbing spring is provided on the outer side of the rotating shaft between bearing one and bearing two, and an isolation sleeve is provided on the outer side of the shock-absorbing spring.

[0012] As a preferred embodiment, the battery box includes a box body, an upper part of which is provided with a mounting part, the box body and the mounting part are hollow inside, a bottom cover is provided at the bottom of the box body, the elastic contact is provided at the upper part of the mounting part, and the handle shell has a connecting cavity at the bottom of the handle base plate that mates with the mounting part.

[0013] As a preferred embodiment, a ball bearing hole is provided on the side wall of the connecting cavity, a ball bearing is provided in the ball bearing hole, a retaining ring is provided on the outer side of the side wall of the connecting cavity, a ball bearing groove is provided in the retaining ring to cooperate with the ball bearing, and a locking groove is provided on the mounting part to cooperate with the ball bearing.

[0014] As a preferred embodiment, locking parts are provided at both the upper and lower parts of the ball groove.

[0015] As a preferred embodiment, the portion of the locking part that contacts the ball bearing is provided with a ball bearing sliding part.

[0016] In this application, the motor drive controller is installed inside the motor box, ensuring that the drive controller does not participate in the sterilization process, reducing the requirements for overall sealing, and avoiding the aging of electronic components caused by long-term continuous high-temperature and high-pressure sterilization. This application can improve the service life of the motor drive controller. Preferably, the motor drive controller is connected to the motor through reliable elastic contacts to avoid poor contact that could affect its use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of some parts of this application;

[0018] Figure 2 This is a structural schematic diagram from one angle of this application;

[0019] Figure 3 This is a structural schematic diagram from angle two of this application;

[0020] Figure 4 This is a structural schematic diagram of the battery box at angle one of this application;

[0021] Figure 5 This is a schematic diagram of the battery box at angle two of this application;

[0022] Figure 6 This is a schematic diagram of the battery compartment opening according to this application;

[0023] Figure 7 This is a schematic diagram of the bottom structure of the handle housing of this application;

[0024] Figure 8 This is a schematic diagram of the structure of the side wall of the handle housing in this application;

[0025] Figure 9 This is a schematic diagram of the internal structure of angle one of the handle housing in this application;

[0026] Figure 10 This is a schematic diagram of the internal structure of angle two of the handle housing in this application;

[0027] Figure 11 This is a schematic diagram of the internal structure of angle three of the handle housing in this application;

[0028] Figure 12 This is a schematic diagram of the internal structure of angle one of the drill bit housing in this application;

[0029] Figure 13This is a schematic diagram of the internal structure of angle two of the drill bit housing in this application;

[0030] Figure 14 This is a top view of the drill bit housing of this application;

[0031] Figure 15 This is a schematic diagram of part of the internal structure of the drill bit casing;

[0032] Figure 16 This is a schematic diagram of the switch structure;

[0033] Figure 17 This is a structural schematic diagram of angle one of the clamping rings;

[0034] Figure 18 This is a structural schematic diagram of angle two of the clamping ring;

[0035] Figure 19 This is a diagram showing the positional relationship between the drive motor and the sensor bracket inside the handle housing;

[0036] 1. Battery box; 2. Handle housing; 3. Drive motor; 4. Drill bit housing; 5. Switch; 6. Spring contact; 7. Pin; 8. Handle base plate; 9. PCB connection board; 10. Push switch; 11. Sensor; 12. Sensor bracket; 13. Bevel gear one; 14. Bevel gear two; 15. Shaft; 16. Drill bit mounting slot; 17. Bearing one; 18. Bearing two; 19. Shaft seal ring; 20. Spacer; 21. Bearing sleeve; 22. Connecting key; 23. Connecting pin; 24. Locking sleeve; 25. Shock-absorbing spring; 26. Isolation sleeve; 27. Body; 28. Handle rear end cover; 29. ​​Box body; 30. Mounting part; 31. Bottom cover; 32. Buckle; 33. Connecting cavity; 34. Ball; 35. Clamping ring; 36. Ball groove; 37. Locking groove; 38. Locking part; 39. Ball sliding part. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 To be continued Figure 19 The specific embodiments of this utility model will be described in detail below. It should be noted that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model. Example 1

[0038] This application provides a medical electric bone drill, including a battery box 1. A handle housing 2 is detachably connected to the upper part of the battery box 1. A drive motor 3 is housed inside the handle housing 2. The drive motor 3 is a brushless motor in the prior art; the specific model is not limited and can be selected by the technician according to specific circumstances. A drill bit housing 4 is located at the top of the handle housing 2. To improve the strength and sealing of the device, preferably, the handle housing 2 and the drill bit housing 4 are integrally formed. A transmission device connected to the drive motor 3 is located inside the drill bit housing 4 and the handle housing 2. One end of the transmission device is fitted with the drill bit. A motor drive controller (not shown in the figure) is fixed inside the battery box 1 and connected using common connection methods in the prior art, such as adhesive or screws. Any existing drive controller can be used, such as the LCP037BK32ET8 or LCP067AT33XU8 from Lingxin Microelectronics, the ADM16x from Jinxin Electronics, or the CW32F030 from Hangshun Chip. The motor drive controller is plugged into the battery installed in the battery box 1, using an XT30 or T... The type of plug is not limited, as long as it facilitates battery replacement; the motor drive controller is connected to the drive motor 3 set in the handle housing 2 through a detachable electrical connection device, which facilitates the disassembly of the handle housing 2 and the battery box 1. When disinfecting, the battery box 1 is removed to avoid the internal motor drive controller being subjected to long-term high temperature and high pressure disinfection, which would accelerate the aging of electronic components and reduce the service life of the electric bone drill.

[0039] As is well known, a switch 5 is connected to the handle housing 2. Pressing the switch will quickly turn it off, start the drive motor 3, and drive the drill bit through the transmission device to perform the corresponding operation. Medical staff can then perform the corresponding operation. Example 2

[0040] This embodiment provides a detailed description of the electrical connection device, specifically:

[0041] The detachable electrical connection device includes a resilient contact 6, which is connected to the motor drive controller. The resilient contact 6 extends to the upper part of the battery box 1. The resilient contact 6 cooperates with a pin 7, which is fixedly mounted on the handle base plate 8. The handle base plate 8 is fixed to the lower middle part of the handle housing 2. One end of the pin 7 is connected to a PCB connection board 9. The PCB connection board 9 only needs to be able to realize signal transmission. This application does not improve its circuitry; it is the same as the prior art and will not be described in detail here. The PCB connection board 9 is fixed to the handle base plate 8 with screws. The PCB connection board 9 is electrically connected to the drive motor 3. To maintain stability, the drive motor 3 is also mounted on the handle base plate 8 with screws or other structures. The aforementioned switch 5 is electrically connected to the PCB connection board 9. Specifically... The switch 5 includes a push switch 10, which cooperates with a sensor 11 disposed inside the handle housing 2. The sensor 11 is fixed on a sensor bracket 12, and the bottom of the sensor bracket 12 is fixed to the PCB connecting board 9 by connecting bolts, etc. The length of the connecting bolts is selected according to specific circumstances and is not limited thereto. The sensor 11 is electrically connected to the PCB connecting board 9. The elastic contact 6 cooperates with the pin 7 to supply power to the drive motor 3 and the PCB connecting board 9. When the push switch 10 contacts the sensor 11, the sensor 11 transmits a signal to the PCB connecting board 9, and the PCB connecting board 9 transmits the signal to the motor drive controller. The motor drive controller controls the drive motor 3 to start, and then drives the drill bit to rotate through the transmission device. Example 3

[0042] This embodiment provides a detailed description of the transmission device, specifically:

[0043] The transmission device includes a first bevel gear 13, which is disposed inside the drill bit housing 4. The first bevel gear 13 meshes with a second bevel gear 14, which is installed inside the handle housing 2. The second bevel gear 14 is connected to the output end of the drive motor 3. A rotating shaft 15 is installed in the middle of the first bevel gear 13. The rotating shaft 15 is connected to the end of the drill bit housing 4. A drill bit mounting groove 16 is provided on one side of the rotating shaft 15 at the end of the drill bit housing 4. A drill bit is installed in the drill bit mounting groove 16. When the drive motor 3 is started, it drives the second bevel gear 14 to rotate. The second bevel gear 14 drives the first bevel gear 13 to rotate. The first bevel gear 13 then drives the rotating shaft 15 and the drill bit mounted on the rotating shaft 15 to rotate.

[0044] More specifically: a bearing 17 and a bearing 18 are mounted on the outer side of the rotating shaft 15. A shaft seal 19 is installed on one side of the bearing 17 on the rotating shaft 15. The shaft seal 19 can prevent lubricating oil leakage and prevent external impurities from entering the bearing 17, thereby ensuring that the rotating shaft 15 can rotate smoothly. A spacer 20 is fitted on one side of the shaft seal 19 on the rotating shaft 15 with clearance. A bearing sleeve 21 is connected to the outer side of the spacer 20. The bearing sleeve 21 and the spacer 20 are connected by a connecting key 22, a connecting pin 23, and other structures. A locking sleeve 24 is provided at the connection between the outer side of the bearing sleeve 21 and the drill bit housing 4. Preferably, in order to play a role in shock absorption, a shock-absorbing spring 25 is provided on the outer side of the rotating shaft 15 between the bearing 17 and the bearing 18. An isolation sleeve 26 is provided on the outer side of the shock-absorbing spring 25. The isolation sleeve 26 ensures the accuracy of the positioning of parts on the rotating shaft 15 and also prevents friction between adjacent parts.

[0045] The drill bit housing 4 includes a body 27, a handle rear end cover 28 is sealed on one side of the body 27, and a locking sleeve 24 is installed on the other side of the body 27. Example 4

[0046] This embodiment provides a detailed description of the connection between the battery box 1 and the handle housing 2. Specifically:

[0047] The battery box 1 includes a box body 29, with a mounting part 30 on the upper part of the box body 29. The box body 29 and the mounting part 30 are hollow inside, and the motor drive controller and battery are installed thereon. The bottom of the box body 29 is provided with a bottom cover 31, which is rotatably connected to one side of the box body 29 and connected to the other side by a buckle 32, so that the bottom cover 31 can be opened to replace the battery. The above is mature prior art, and this application does not make any improvements to it, and will not be described in detail here.

[0048] The upper part of the mounting part 30 is provided with the elastic contact 6. The handle housing 2 has a connecting cavity 33 at the bottom of the handle base plate 8 that mates with the mounting part 30. The pin 7 is installed in the connecting cavity 33. The mounting part 30 is installed into the connecting cavity 33, and the pin 7 is inserted into the elastic contact 6 to provide power to the drive motor 3 and the PCB connection board 9. More specifically, a ball hole is opened on the side wall of the connecting cavity 33, and a ball (steel ball) 34 is provided in the ball hole. A retaining ring 35 is provided on the outer side of the side wall of the connecting cavity 33, and a ball groove 36 that mates with the ball 34 is opened in the retaining ring 35. The mounting part 30 The upper part is provided with a locking groove 37 that mates with the ball 34; pushing the locking ring 35 upward pushes the ball groove 36 to the position where it mates with the ball 34, and the ball 34 has room to retract. The battery box 1 is inserted into the connecting cavity 33 or pulled out. When the battery box 1 is inserted into the connecting cavity 33, the locking ring 35 is pulled to reset, the ball groove 36 is disengaged from the ball 34, and the ball 34 has no room to retract. The connection between the battery box 1 and the handle housing 2 is achieved by the ball 34 locking into the locking groove 37. In the design of this application, when the locking ring 35 is pushed to the uppermost position, the ball groove 36 mates with the ball 34, and it is not necessary to manually observe whether the mating is achieved.

[0049] Preferably, in order to facilitate the movement of the locking ring 35, the upper and lower parts of the ball groove 36 are provided with locking parts 38, and the part of the locking part 38 that contacts the ball 34 is provided with a ball sliding part 39.

[0050] In this application, the motor drive controller is installed inside the motor box, ensuring that the drive controller does not participate in the sterilization process, reducing the requirements for overall sealing, and avoiding the aging of electronic components caused by long-term continuous high-temperature and high-pressure sterilization. This application can improve the service life of the motor drive controller. Preferably, the motor drive controller is connected to the motor through reliable elastic contacts to avoid poor contact that could affect its use.

[0051] The devices and connections not specifically described above are all existing technologies, and will not be described in detail here.

[0052] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the various possible combinations in this application will not be described separately.

[0054] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, and such combinations should also be regarded as the content disclosed in this application.

Claims

1. A medical electric bone drill, comprising a battery box (1), characterized in that, The upper part of the battery box (1) is detachably connected to the handle housing (2), the handle housing (2) is provided with a drive motor (3), the top of the handle housing (2) is provided with a drill housing (4), the drill housing (4) and the handle housing (2) are provided with a transmission device connected to the drive motor (3), the battery box (1) is fixed with a motor drive controller, the motor drive controller is plugged into the battery installed in the battery box (1), and the motor drive controller is connected to the drive motor (3) provided in the handle housing (2) through a detachable electrical connection device.

2. The medical electric bone drill according to claim 1, characterized in that, The detachable electrical connection device includes a resilient contact (6), which is connected to the motor drive controller. The resilient contact (6) extends to the upper part of the battery box (1). The resilient contact (6) cooperates with a pin (7). The pin (7) is fixedly mounted on the handle base plate (8). The handle base plate (8) is fixed to the inside of the handle housing (2). One end of the pin (7) is connected to the PCB connection board (9). The PCB connection board (9) is connected to the drive motor (3).

3. The medical electric bone drill according to claim 1, characterized in that, The transmission device includes a first bevel gear (13), which meshes with a second bevel gear (14). The second bevel gear (14) is connected to the output end of the drive motor (3). A rotating shaft (15) is installed in the middle of the first bevel gear (13). The rotating shaft (15) is connected to the end of the drill bit housing (4). A drill bit mounting groove (16) is provided on one side of the end of the drill bit housing (4).

4. A medical electric bone drill according to claim 2, characterized in that, The battery box (1) includes a box body (29), an installation part (30) is provided on the upper part of the box body (29), the box body (29) and the installation part (30) are hollow inside, a bottom cover (31) is provided at the bottom of the box body (29), the elastic contact (6) is provided on the upper part of the installation part (30), and the handle shell (2) has a connecting cavity (33) at the bottom of the handle base plate (8) that cooperates with the installation part (30).

5. A medical electric bone drill according to claim 4, characterized in that, The connecting cavity (33) has a ball hole on its side wall, and a ball (34) is provided in the ball hole. A retaining ring (35) is provided on the outer side of the side wall of the connecting cavity (33). A ball groove (36) that cooperates with the ball (34) is provided in the retaining ring (35). A locking groove (37) that cooperates with the ball (34) is provided on the mounting part (30).

6. A medical electric bone drill according to claim 5, characterized in that, The upper and lower parts of the ball groove (36) are provided with locking parts (38).

7. A medical electric bone drill according to claim 6, characterized in that, The locking part (38) that contacts the ball (34) is provided with a ball sliding part (39).

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