Planing cutter with detachable inner cutter and detachable outer cutter

Abstract

The utility model relates to the field of medical instruments, and discloses a planing cutter with detachable inner and outer cutters, which comprises a main shell, an inner cutter component, a motor, an outer cutter component and a suction component, the inner cutter component is rotatably mounted on the main shell, the motor is mounted in the main shell and used for driving the inner cutter component to rotate, and the suction component is mounted on the outer cutter component. The outer cutter assembly is arranged outside the inner cutter assembly in a sleeving mode, the suction assembly is used for sucking a cut soft assembly, the planing cutter further comprises a front shell, the front shell is detachably installed on the main shell, and the outer cutter assembly is installed on the front shell. By the adoption of the technical scheme, after the planing cutter is used, the front shell can be directly detached from the main shell, the outer cutter assembly can be separated from the inner cutter assembly, a worker can clean dirt between the outer cutter assembly and the inner cutter assembly, and due to the design, cleaning treatment of the planing cutter is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a shaving tool with detachable inner and outer blades. Background Art

[0002] A shaving tool is a medical auxiliary instrument used in arthroscopic surgery, otolaryngology surgery, and hysteroscopic shaving surgery. Through the mutual cooperation of the outer tool and the inner tool, it realizes the cutting treatment of soft tissues, and can aspirate the cut soft components to the outside through negative pressure aspiration.

[0003] For example, a medical soft tissue shaving tool disclosed in Patent Application No. 202310393488.8 includes a shaving tool assembly, a reducer assembly, a front housing, a motor, and a suction device. The shaving tool assembly includes a hollow outer tool assembly and an inner tool assembly. The inner tool assembly is sleeved in the outer tool assembly. The reducer assembly is fixed in the handle housing. The reducer assembly includes a reducer housing and a transmission gear set. The other end of the outer tool assembly is connected to the reducer housing. The transmission gear set is respectively connected to the other end of the inner tool assembly and the output end of the motor. The suction device includes a suction valve and a suction pipe.

[0004] When the above-mentioned shaving tool is in use, since the outer tool assembly and the inner tool assembly can rotate relative to each other, soft tissue debris or other impurities cut by the tool are likely to enter the gap between the outer tool assembly and the inner tool assembly, which is very inconvenient to clean. Summary of the Invention

[0005] In view of this, the purpose of the utility model is to provide a shaving tool with detachable inner and outer blades, which is used to solve the problem pointed out in the background art that soft tissue debris or other impurities cut by the tool are likely to enter the gap between the outer tool assembly and the inner tool assembly, which is very inconvenient to clean.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A shaving tool with detachable inner and outer blades includes a main housing, an inner tool assembly, a motor, an outer tool assembly, and a suction assembly. The inner tool assembly is rotatably installed on the main housing. The motor is installed in the main housing and is used to drive the inner tool assembly to rotate. The outer tool assembly is sleeved outside the inner tool assembly. The suction assembly is used to aspirate the cut soft components. The shaving tool further includes a front housing, which is detachably installed on the main housing, and the outer tool assembly is installed on the front housing.

[0008] Further, a socket portion is provided on the outer side wall of one end of the main housing close to the inner tool assembly. The end of the front housing away from the outer tool assembly is open, and the open end of the front housing is detachably sleeved on the socket portion of the front housing.

[0009] Furthermore, the planing tool further includes a circuit board installed in the main housing. The circuit board is electrically connected to the motor, and a first Hall element is installed on the circuit board. A key is installed on the front housing at a position corresponding to the first Hall element, and a first permanent magnet is installed on the bottom side of the key. The first Hall element can sense the first permanent magnet to confirm whether the front housing and the main housing are connected and to control the start and stop of the motor.

[0010] Furthermore, a second Hall element is installed on the circuit board. A magnet seat is installed on the output shaft of the motor, and a second permanent magnet is installed on the magnet seat. The second Hall element can sense the second permanent magnet to detect the rotation speed of the motor output shaft and to perform constant speed control on the motor.

[0011] Furthermore, the outer tool assembly includes an outer tool tube and an outer tool head. The outer tool head is installed at the end of the outer tool tube, and one end of the outer tool tube away from the outer tool head is installed on the front housing.

[0012] Furthermore, an outer planing tool seat is installed in the front housing. An installation channel is provided in the outer planing tool seat, and a guide sleeve is installed in the installation channel. One end of the outer tool tube away from the outer tool head is installed in the guide sleeve, and a lip seal is installed between the guide sleeve and the outer planing tool seat.

[0013] Furthermore, the inner tool assembly includes an inner tool tube and an inner tool head. The inner tool head is installed at the end of the inner tool tube, and one end of the inner tool tube away from the inner tool head is rotatably installed on the main housing.

[0014] Furthermore, a retaining sleeve, a bearing, a positioning sleeve and a main shaft are installed in the main housing. The main shaft is of a hollow structure. The main shaft passes through the retaining sleeve and the bearing and is rotatably installed in the main housing through the bearing. The inner tool tube passes through the positioning sleeve and can rotate relative to the positioning sleeve. One end of the inner tool tube away from the inner tool head is fixed to one end of the main shaft. The output shaft of the motor is in transmission connection with the main shaft.

[0015] Furthermore, the planing tool further includes a speed reduction assembly installed in the main housing. The speed reduction assembly includes a mounting seat, a first-stage gear, a double gear and a final-stage gear. The mounting seat is fixed in the main housing. The first-stage gear is fixed on the output shaft of the motor. The final-stage gear is fixed on the main shaft. The double gear is rotatably installed on the mounting seat through a rotating shaft. The double gear is arranged between the first-stage gear and the final-stage gear and meshes with both the first-stage gear and the final-stage gear.

[0016] Further, the suction assembly includes a suction pipe and a suction joint; the suction joint is installed at one end of the suction pipe for connecting to an external negative pressure source; the end of the suction pipe away from the suction joint is installed in the main housing and communicated with the end of the main shaft away from the inner cutter tube, and the inner cutter head, the inner cutter tube, the main shaft and the suction pipe are sequentially communicated; an annular sealing ring is installed between the main shaft and the main housing.

[0017] Advantages of the present utility model:

[0018] 1. By adopting the technical solution of the present application, after the planing tool is used up, the front housing can be directly detached from the main housing, and the outer cutter assembly can be separated from the inner cutter assembly, so that the staff can clean the dirt between the outer cutter assembly and the inner cutter assembly. Such a design facilitates the cleaning of the planing tool.

[0019] 2. By the mutual cooperation of the first Hall element and the first magnet, it is possible to confirm whether the front housing and the main housing are connected, and to control the start and stop of the motor.

[0020] 3. By the mutual cooperation of the second Hall element and the second magnet, it is possible to detect the rotation speed of the motor output shaft and perform constant speed control on the motor. Description of the drawings

[0021] Figure 1 is a schematic structural diagram of a planing tool with a detachable inner and outer cutter in an embodiment of the present application;

[0022] Figure 2 is a cross-sectional view of the front housing and the outer cutter assembly in an embodiment of the present application;

[0023] Figure 3 is an embodiment of the present application Figure 2 an enlarged schematic view of part A in;

[0024] Figure 4 is a cross-sectional view of the main housing, the inner cutter assembly, the motor, the suction assembly and the reduction assembly in an embodiment of the present application;

[0025] Figure 5 is an embodiment of the present application Figure 4 an enlarged schematic view of part B in;

[0026] Among them, 100 is the main housing; 101 is the socket part; 102 is the cable; 103 is the retaining sleeve; 104 is the bearing; 105 is the positioning sleeve; 106 is the main shaft; 107 is the annular sealing ring; 200 is the inner cutter assembly; 210 is the inner cutter tube; 220 is the inner cutter head; 300 is the motor; 301 is the magnet seat; 302 is the second magnet; 400 is the outer cutter assembly; 410 is the outer cutter tube; 420 is the outer cutter head; 500 is the suction assembly; 510 is the suction pipe; 520 is the suction joint; 600 is the front housing; 601 is the open end; 602 is the key; 603 is the outer planing cutter seat; 604 is the guide sleeve; 605 is the lip seal; 700 is the circuit board; 800 is the reduction assembly; 810 is the mounting seat; 820 is the first-stage gear; 830 is the double gear; 840 is the final-stage gear. Detailed implementation manners

[0027] The following specific embodiments are used to illustrate the implementation manners of the present utility model. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Such as Figures 1-5As shown in the figure, an embodiment of the present application provides a planing tool with a detachable inner and outer cutter, including a main housing 100, an inner cutter assembly 200, a motor 300, an outer cutter assembly 400, a suction assembly 500, and a front housing 600. Among them, the main housing 100 is assembled by two half-housings. The inner cutter assembly 200 is rotatably installed on the main housing 100. The motor 300 is installed in the main housing 100 and is used to drive the inner cutter assembly 200 to rotate. Both the outer cutter assembly 400 and the inner cutter assembly 200 are hollow structures. The outer cutter assembly 400 is sleeved outside the inner cutter assembly 200. The suction assembly 500 is used to suck the cut soft components. The front housing 600 is detachably installed on the main housing 100, and the outer cutter assembly 400 is installed on the front housing 600.

[0030] By adopting the above technical solution, when the planing tool is used up, the front housing 600 can be directly detached from the main housing 100, and the outer cutter assembly 400 can be separated from the inner cutter assembly 200, so that the staff can clean the dirt between the outer cutter assembly 400 and the inner cutter assembly 200. This design facilitates the cleaning of the planing tool.

[0031] In this embodiment, a socket part 101 is provided on the outer side wall of the main housing 100 near one end of the inner cutter assembly 200. One end of the front housing 600 away from the outer cutter assembly 400 is open, and the open end 601 of the front housing 600 is detachably sleeved on the socket part 101 of the front housing 600. The front housing 600 and the front housing 600 can be detachably connected by an interference fit method, or can be detachably connected by another clamping structure.

[0032] In this embodiment, the planing tool further includes a circuit board 700 installed in the main housing 100. The circuit board 700 is electrically connected to the motor 300 and can control the start, stop, and speed of the motor 300. A cable 102 is connected to the rear end of the main housing 100, and the cable 102 can supply power to the electrical components in the planing tool. A first Hall element is installed on the circuit board 700. An elastic button 602 is installed on the front housing 600 at a position corresponding to the first Hall element. A first permanent magnet is installed on the bottom side of the button 602, and the first Hall element can sense the first permanent magnet. By the mutual cooperation of the first Hall element and the first permanent magnet, it can be used to confirm whether the front housing 600 and the main housing 100 are connected, and to control the start and stop of the motor 300.

[0033] It can be understood that when the current housing 600 is installed on the main housing 100, the first Hall element can sense the first magnet, thereby confirming whether the front housing 600 and the main housing 100 are connected; when the staff presses the button 602, the position of the first magnet changes, and the first Hall element senses this change, and controls the motor 300 to start through the circuit board 700; when the staff presses the button 602 again, the circuit board 700 is used to control the motor 300 to stop working.

[0034] In this embodiment, a second Hall element is installed on the circuit board 700; a magnet seat 301 is installed on the output shaft of the motor 300, and a second magnet 302 is installed on the magnet seat 301; the second Hall element can sense the second magnet 302. Through the mutual cooperation of the second Hall element and the second magnet 302, it can be used to detect the rotational speed of the output shaft of the motor 300 and perform constant speed control on the motor 300.

[0035] It should be noted that the specific principle of the cooperation between the Hall element and the magnet is prior art and will not be elaborated in detail in this embodiment.

[0036] In this embodiment, the outer knife assembly 400 includes an outer knife tube 410 and an outer knife head 420. The outer knife head 420 is fixed to the end of the outer knife tube 410. A window structure is provided on the outer knife head 420, and this window structure enables the outer knife tube 410 to communicate with the outside; cutting teeth are provided on the outer knife head 420 at the window structure for cooperating with the inner knife assembly 200 to cut the soft tissue of the patient. One end of the outer knife tube 410 away from the outer knife head 420 is fixed to the front housing 600. In this way, the installation of the outer knife assembly 400 is realized.

[0037] In this embodiment, an outer planing knife seat 603 is installed in the front housing 600. An installation channel is provided in the outer planing knife seat 603. A guide sleeve 604 is fixed in the installation channel. One end of the outer knife tube 410 away from the outer knife head 420 is fixed in the guide sleeve 604, and a lip seal 605 is installed between the guide sleeve 604 and the outer planing knife seat 603. By setting it in this way, the outer knife tube 410 can be better installed on the front housing 600, improving the tightness and sealing performance of the connection between the structures.

[0038] In this embodiment, the inner knife assembly 200 includes an inner knife tube 210 and an inner knife head 220. The inner knife head 220 is fixed to the end of the inner knife tube 210. The inner knife head 220 is similar in structure to the outer knife head 420 and is also provided with a window structure and cutting teeth. The window structure of the inner knife head 220 enables the inner knife tube 210 to communicate with the outside, and can adsorb the cut soft tissue of the patient into the inner knife tube 210. The cutting teeth of the inner knife head 220 can cooperate with the cutting teeth of the outer knife head 420 to realize the cutting of the soft tissue of the patient. One end of the inner knife tube 210 away from the inner knife head 220 is rotatably installed on the main housing 100. When the current housing 600 is installed on the main housing 100, the outer knife head 420 is sleeved outside the inner knife head 220, the outer knife tube 410 is sleeved outside the inner knife tube 210, and the inner knife tube 210 can rotate relative to the outer knife tube 410.

[0039] In this embodiment, a retaining sleeve 103, a bearing 104, a positioning sleeve 105 and a main shaft 106 are installed in the main housing 100. Among them, the retaining sleeve 103, the bearing 104 and the positioning sleeve 105 are all fixed in the main housing 100. The shaft is of a hollow structure. The main shaft 106 passes through the retaining sleeve 103 and the bearing 104 and is rotatably installed in the main housing 100 through the bearing 104. The setting of the retaining sleeve 103 is mainly to facilitate the installation of the bearing 104. The inner knife tube 210 passes through the positioning sleeve 105 and can rotate relative to the positioning sleeve 105 for positioning the inner knife tube 210. One end of the inner knife tube 210 away from the inner knife head 220 is coaxially fixed to one end of the main shaft 106. Specifically, one end of the inner knife tube 210 can be inserted into one end of the main shaft 106. The output shaft of the motor 300 is in transmission connection with the main shaft 106. When the motor 300 is started, it can drive the main shaft 106 to rotate, and then drive the inner knife tube 210 to rotate through the main shaft 106.

[0040] In this embodiment, the planing tool further includes a speed reduction assembly 800 installed in the main housing 100. The speed reduction assembly 800 includes a mounting seat 810, a first-stage gear 820, a double gear 830 and a final-stage gear 840. Among them, the mounting seat 810 is fixed in the main housing 100. The output of the motor 300 passes through the mounting seat 810, and the first-stage gear 820 is fixed on the output shaft of the motor 300. The final-stage gear 840 is fixed on the main shaft 106. The double gear 830 is rotatably installed on the mounting seat 810 through a rotating shaft. The double gear 830 is arranged between the first-stage gear 820 and the final-stage gear 840. The double gear 830 has two gears with different numbers of teeth, and the double gear 830 meshes with both the first-stage gear 820 and the final-stage gear 840. It should be noted that the number of teeth of the first-stage gear 820, the double gear 830 and the final-stage gear 840 can be set according to specific situations to realize the transmission and speed reduction between the motor 300 and the main shaft 106 in a gear transmission manner.

[0041] In this embodiment, the suction assembly 500 includes a suction pipe 510 and a suction joint 520. Among them, the suction joint 520 is installed at one end of the suction pipe 510 and is used to connect an external negative pressure source. The end of the suction pipe 510 away from the suction joint 520 is installed in the main housing 100 and is communicated with the end of the main shaft 106 away from the inner cutter tube 210. The inner cutter head 220, the inner cutter tube 210, the main shaft 106, and the suction pipe 510 are communicated in sequence to form a negative pressure channel for sucking the soft tissues of the patient. In addition, an annular sealing ring 107 is installed between the main shaft 106 and the main housing 100 to improve the sealing performance between the main shaft 106 and the suction pipe 510.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A detachable planing tool with inner and outer blades, comprising a main housing (100), an inner blade assembly (200), a motor (300), an outer blade assembly (400) and a suction assembly (500), wherein the inner blade assembly (200) is rotatably mounted on the main housing (100), the motor (300) is mounted in the main housing (100) and is used to drive the inner blade assembly (200) to rotate, the outer blade assembly (400) is sleeved on the outside of the inner blade assembly (200), and the suction assembly (500) is used to suck the cut soft component, characterized in that: The planing tool further comprises a front housing (600), wherein the front housing (600) is detachably mounted on the main housing (100), and the outer blade assembly (400) is mounted on the front housing (600).

2. The planing tool according to claim 1, characterized in that: A sleeve connection portion (101) is provided on the outer side wall of the main shell (100) at one end close to the inner knife assembly (200), and the front shell (600) is open at one end away from the outer knife assembly (400), and the open end (601) of the front shell (600) is detachably sleeved on the sleeve connection portion (101) of the front shell (600).

3. The planing tool according to claim 1, characterized in that: The planing tool also includes a circuit board (700) installed in the main housing (100), the circuit board (700) is electrically connected to the motor (300), and a first Hall element is installed on the circuit board (700); a button (602) is installed at a position corresponding to the first Hall element on the front housing (600), and a first magnet is installed on the bottom side of the button (602); the first Hall element can sense the first magnet, and is used to confirm whether the front housing (600) and the main housing (100) are connected, and to control the start and stop of the motor (300).

4. The planing tool according to claim 3, characterized in that: A second Hall element is mounted on the circuit board (700); a magnetic steel seat (301) is mounted on the output shaft of the motor (300), and a second magnetic steel (302) is mounted on the magnetic steel seat (301); the second Hall element is capable of sensing the second magnetic steel (302) and is used to detect the rotation speed of the output shaft of the motor (300) and to perform constant speed control on the motor (300).

5. The planing tool according to any one of claims 1 to 4, characterized in that: The outer knife assembly (400) comprises an outer knife tube (410) and an outer knife head (420), wherein the outer knife head (420) is mounted at the end of the outer knife tube (410), and an end of the outer knife tube (410) away from the outer knife head (420) is mounted on the front shell (600).

6. The planing tool according to claim 5, characterized in that: An external planer seat (603) is installed in the front shell body (600), a mounting channel is provided in the external planer seat (603), a guide sleeve (604) is installed in the mounting channel, an end of the external knife tube (410) away from the external knife head (420) is installed in the guide sleeve (604), and a lip sealing ring (605) is installed between the guide sleeve (604) and the external planer seat (603).

7. The planing tool according to any one of claims 1 to 4, characterized in that: The inner knife assembly (200) comprises an inner knife tube (210) and an inner knife head (220), wherein the inner knife head (220) is mounted at the end of the inner knife tube (210), and one end of the inner knife tube (210) away from the inner knife head (220) is rotatably mounted on the main housing (100).

8. The planing tool according to claim 7, characterized in that A stop sleeve (103), a bearing (104), a positioning sleeve (105) and a main shaft (106) are installed in the main housing (100); the main shaft (106) is a hollow structure, the main shaft (106) passes through the stop sleeve (103) and the bearing (104), and is rotatably installed in the main housing (100) through the bearing (104); the inner knife tube (210) passes through the positioning sleeve (105) and can rotate relative to the positioning sleeve (105), and one end of the inner knife tube (210) away from the inner knife head (220) is fixed to one end of the main shaft (106); the output shaft of the motor (300) is transmission-connected to the main shaft (106).

9. The planing tool according to claim 8, characterized in that The planing tool also includes a reduction assembly (800) installed in the main housing (100), and the reduction assembly (800) includes a mounting seat (810), a first-stage gear (820), a double-stage gear (830) and a final-stage gear (840); the mounting seat (810) is fixed in the main housing (100); the first-stage gear (820) is fixed on the output shaft of the motor (300); the final-stage gear (840) is fixed on the main shaft (106); the double-stage gear (830) is rotatably mounted on the mounting seat (810) via a rotating shaft, and the double-stage gear (830) is arranged between the first-stage gear (820) and the final-stage gear (840), and is meshed with both the first-stage gear (820) and the final-stage gear (840).

10. The planing tool according to claim 7, characterized in that The suction assembly (500) includes a suction tube (510) and a suction connector (520); the suction connector (520) is installed at one end of the suction tube (510) and is used to connect to an external negative pressure source; the end of the suction tube (510) away from the suction connector (520) is installed in the main shell (100) and is connected to the end of the main shaft (106) away from the inner knife tube (210), and the inner knife head (220), the inner knife tube (210), the main shaft (106) and the suction tube (510) are connected in sequence; an annular sealing ring (107) is installed between the main shaft (106) and the main shell (100).

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