Disposable planer tool

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a disposable planer tool. The planer tool comprises a planer tool head, a handle shell, a driving unit, a battery and a pressure-sensitive key, the planer tool head comprises an inner tool tube and an outer tool tube arranged on the inner tool tube in a sleeving mode, and the outer tool tube is fixedly connected to the handle shell. A transmission shaft is arranged at the output end of the driving unit, the inner knife tube is fixedly connected to the transmission shaft, the transmission shaft is used for driving the inner knife tube to rotate around the axis of the inner knife tube, the handle shell is provided with a negative pressure pipeline, the negative pressure pipeline is used for being communicated with external suction equipment, and the external suction equipment is communicated with the inner knife tube through the negative pressure pipeline. The external suction equipment is used for sucking the interior of the inner knife tube; the battery is used for supplying power to the driving unit; and the pressure-sensitive key is used for controlling start and stop and speed regulation of the driving unit. According to the planer tool, through improvement of the overall structure, integration of surgical equipment is achieved, the surgical cost is reduced, and the surgical efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a disposable planer. Background Art

[0002] During arthroscopic surgery, doctors need to cut the soft tissue (synovium) and bone tissue (cartilage, osteophytes) within the joint. The planing power system is a high-performance general-purpose surgical tool designed specifically for the requirements of abrasion arthroplasty, synovectomy, and cutting and scraping within the joint. During the operation, doctors use a planer connected to the planing power system to clean and shape the synovium, meniscus, and cartilage within the joint, and use a grinding head connected to the planing power system to remove and shape the osteophytes and articular surfaces within the joint to achieve the treatment purpose.

[0003] Currently, mainstream products on the market are all imported and use mains power. Their basic components include a display screen, power handle, cable, system main unit, and foot switch. Before surgery begins, the handle needs to be sterilized, typically using high-temperature and high-pressure sterilization, typically at 134°C for 10 minutes. To begin surgery, the disposable blade is first removed from its outer packaging and removed. A negative pressure suction tube is then connected to the blade; after this connection is complete, the procedure begins. Under imaging guidance, the main unit drives the blade to cut the target lesion, drawing it into the notch of the puncture rotary cutter head through negative pressure suction. After cutting, the excised target lesion is transported out of the body through negative pressure suction. When encountering harder bone tissue, a large grinding head is required to grind and remove the hard bone tissue.

[0004] However, existing arthroscopic minimally invasive surgical equipment has the following defects:

[0005] 1) The product uses a rotary cutter mounted on a power handle, which is an integral part of the device. During surgery, the surgeon, wearing sterile surgical gowns and gloves, must hold the power handle to operate the device. The power handle requires high-temperature disinfection after each surgery. The handle contains motors, circuit boards, and other components, which are easily damaged in a high-temperature, high-pressure disinfection environment.

[0006] 2) The whole machine structure is complex. Currently, the main equipment is mainly imported. High temperature and high pressure sterilization will shorten the service life of the product. At present, the service life of most imported products is around 300 times, and the cost of use is relatively high.

[0007] 3) As part of the device, the handle needs to be reused, and there may be residual blood stains from the previous patient, posing a risk of infection to the next surgical patient;

[0008] 4) Expensive. Currently, the main equipment is mainly imported, costing hundreds of thousands of yuan. In addition, many small and medium-sized hospitals are unable to purchase or obtain the main equipment in a timely manner due to financial and institutional constraints, and are also unable to perform this type of surgery. As a result, a large number of patients with suitable indications cannot undergo this type of surgery, or are forced to undergo open surgery with larger incisions, leaving long scars and causing great psychological pressure on patients.

[0009] 5) Switching surgical methods during surgery requires adjusting the touch screen buttons. However, the surgeon and nurse on the operating table are wearing sterile surgical gowns and sterile gloves and cannot touch the non-sterile host touch screen. This requires another nurse to adjust the buttons, which increases the hospital's labor costs. The above situation may cause the operation time to be extended, resulting in longer exposure time of the patient's affected area and increased risk of infection. Utility Model Content

[0010] The purpose of the utility model is to provide a disposable planer to integrate surgical equipment, reduce surgical costs and improve surgical efficiency.

[0011] To achieve this purpose, the present invention adopts the following technical solutions:

[0012] A disposable planer comprises a handle shell, a planer head, a drive unit, a battery and a pressure-sensitive button; the planer head comprises an inner knife tube and an outer knife tube sleeved on the inner knife tube, and the outer knife tube is fixedly connected to the handle shell; the drive unit is arranged in the handle shell, and the output end of the drive unit is provided with a transmission shaft, and the inner knife tube is fixedly connected to the transmission shaft, and the transmission shaft is used to drive the inner knife tube to rotate around the axis of the inner knife tube, and the handle shell is provided with a negative pressure pipeline, and the negative pressure pipeline is used to connect to an external suction device, and the external suction device is connected to the inner knife tube through the negative pressure pipeline, and the external suction device is used to suck the inside of the inner knife tube; the battery is arranged in the handle shell, and the battery is used to power the drive unit; the pressure-sensitive button is arranged in the drive unit, and the pressure-sensitive button is used to control the start, stop and speed regulation of the drive unit.

[0013] As an optional technical solution for a disposable planer, the handle shell has a accommodating cavity and a shell hole connected to the accommodating cavity, the drive unit and the battery are arranged in the accommodating cavity, and the inner blade tube passes through the shell hole; the disposable planer also includes a sealed bearing, which is used to seal the gap between the inner blade tube and the shell hole.

[0014] As an optional technical solution for the disposable planer, the inner ring of the sealed bearing is fitted to the outer wall of the inner blade tube, and the outer ring of the sealed bearing is fitted to the hole wall of the housing hole.

[0015] As an optional technical solution for disposable planers, the handle housing includes a housing body and a housing back cover detachably connected to the housing body, the housing body is provided with a receiving groove, and the receiving groove and the housing back cover form the receiving cavity.

[0016] As an optional technical solution for the disposable planer, the disposable planer also includes a sealing ring, the rear cover of the casing is partially inserted into the accommodating groove, and the sealing ring is clamped between the outer wall of the rear cover of the casing and the groove wall of the accommodating groove.

[0017] As an optional technical solution for the disposable planer, a shock-absorbing foam is provided on the rear cover of the housing, and the shock-absorbing foam presses against the drive unit and / or the battery.

[0018] As an optional technical solution for the disposable planer, the handle shell is made of engineering plastic.

[0019] As an optional technical solution for the disposable planer, the planer head is made of stainless steel.

[0020] As an optional technical solution for the disposable planer, the disposable planer is used to connect the negative pressure suction tube and the negative pressure suction system, and the two ends of the negative pressure suction tube are detachably connected to the negative pressure pipeline and the negative pressure suction system respectively.

[0021] As an optional technical solution for the disposable planer, a flow rate regulator is provided on the negative pressure suction tube.

[0022] Beneficial effects of the utility model:

[0023] Through improvements to its overall structure, this disposable planer integrates the drive unit, handle housing, and planer head components required for surgical instruments, resulting in a simple and compact structure and an integrated design. The sterile protection of the disposable planer reduces the risk of infection during surgery. The disposable planer has a built-in drive unit powered by a battery, eliminating the need for external cables, thus avoiding the risk of infection caused by cables during surgery. With the provision of pressure-sensitive buttons, a signal can be sent to the drive unit by pressing the pressure-sensitive buttons, causing the internal blade tube to rotate and cut the target tissue, thereby enabling interaction with the disposable planer and effective command transmission. These improvements optimize the disposable planer's operating interface and increase the degree of operational freedom, allowing the operator to freely control the operation during surgery without increasing manpower. Furthermore, the pressure-sensitive buttons utilize a pressure-sensitive design, which helps prevent water from entering the buttons and causing them to malfunction, reducing the risk of water damage to the disposable planer. By using an external suction device to draw suction from the inner blade tube, tissue fragments removed by the inner blade tube are drawn out of the disposable planer through a negative pressure line. Therefore, using this disposable planer in conjunction with the external suction device can complete the entire minimally invasive surgery process, eliminating the need to purchase separate equipment. This reduces the equipment requirements for the hospital, simplifies surgical equipment, and lowers surgical costs. After the procedure, the disposable planer is disposed of as medical waste, making it easy and labor-intensive, ensuring single-use, convenient, and hygienic use, while also improving surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a disposable planer and a negative pressure suction tube provided in an embodiment of the present utility model;

[0025] Figure 2 This is a cross-sectional view of a disposable planer and a negative pressure suction tube provided in an embodiment of the present utility model;

[0026] Figure 3 yes Figure 2 A partial enlarged view of middle A.

[0027] In the picture:

[0028] 100. Handle housing; 110. Housing body; 111. Negative pressure pipeline; 120. Housing back cover; 121. Shock-absorbing foam; 200. Drive unit; 210. Drive shaft; 300. Planer head; 310. Inner blade tube; 320. Outer blade tube; 400. Battery; 500. Pressure-sensitive button; 600. Negative pressure suction tube; 700. Sealed bearing; 800. Sealing ring; 900. Flow rate regulator. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] like Figures 1 to 3As shown, this embodiment provides a disposable planer, including a handle housing 100, a planer head 300, a drive unit 200, a battery 400 and a pressure-sensitive button 500; the planer head 300 includes an inner knife tube 310 and an outer knife tube 320 sleeved on the inner knife tube 310, and the outer knife tube 320 is fixedly connected to the handle housing 100; the drive unit 200 is provided in the handle housing 100, and the output end of the drive unit 200 is provided with a transmission shaft 210, and the inner knife tube 310 is fixedly connected to the transmission shaft 210, and the transmission shaft 210 is used to drive the inner knife tube 310. 10 rotates around the axis of the inner knife tube 310, and the handle shell 100 is provided with a negative pressure pipeline 111, which is used to connect to an external suction device. The external suction device is connected to the inner knife tube 310 through the negative pressure pipeline 111, and the external suction device is used to suction the inside of the inner knife tube 310; the battery 400 is provided in the handle shell 100, and the battery 400 is used to supply power to the drive unit 200; the pressure-sensitive button 500 is provided in the drive unit 200, and the pressure-sensitive button 500 is used to control the start, stop and speed regulation of the drive unit 200.

[0034] This disposable planer incorporates the surgical instrument's drive unit 200, handle housing 100, and planer head 300 components into a single, simple, and compact design. This integrated design reduces the risk of surgical infection by ensuring sterility. The disposable planer incorporates a built-in drive unit 200, powered by a battery 400. This eliminates the need for external cables, thus avoiding the risk of infection caused by cables during surgery. A pressure-sensitive button 500 is provided to transmit a signal to the drive unit 200 by pressing it, rotating the inner blade tube 310 and cutting the target tissue. This allows for efficient interaction with the disposable planer and effective command transmission. These improvements optimize the disposable planer's user interface and enhance operational flexibility, allowing operators to freely control the operation without requiring additional manpower. Furthermore, the pressure-sensitive button 500 utilizes a pressure-sensitive design, which helps prevent water ingress and malfunction, reducing the risk of damage to the disposable planer. By using an external suction device to suction the interior of the inner blade tube 310, tissue fragments removed by the inner blade tube 310 are suctioned and discharged from the disposable planer through the negative pressure line 111. Thus, using this disposable planer in conjunction with the external suction device can complete the entire minimally invasive surgery process without the need to purchase separate equipment. This reduces the equipment requirements for the hospital, simplifies surgical equipment, and reduces surgical costs. After the procedure, the disposable planer is disposed of as medical waste, making it easy and labor-intensive, achieving single-use, convenient, and hygienic use, and improving surgical efficiency.

[0035] By using the above-mentioned disposable planer to perform minimally invasive surgery, hospitals no longer need to purchase expensive equipment, which greatly reduces the rigid requirements for surgery. At the same time, it can also be better popularized to small and medium-sized grassroots hospitals to meet the needs of a large number of patients. Since there is no need to purchase expensive equipment, the corresponding surgical costs will be greatly reduced, reducing the economic burden on patients. The design of providing a pressure-sensitive button 500 on the handle housing 100 reduces the amount of intraoperative operations and reduces labor costs. At the same time, the hospital no longer needs to clean and disinfect the handle housing 100 and the cable after each operation, which reduces the hospital's manpower requirements. It avoids the situation where water enters the surgical instrument during the cleaning process, causing a short circuit, and avoids the risk of patient infection caused by incomplete cleaning and disinfection of surgical instruments.

[0036] Specifically, the disposable planer is packaged in sterile packaging. The above-mentioned limitation further improves the cleanliness of the surgical environment and reduces the risk of intraoperative infection.

[0037] The battery 400 is a lithium battery. In other implementations of this embodiment, the battery 400 is made of other materials. The material of the battery 400 is determined by those skilled in the art based on actual engineering practice and will not be elaborated on here.

[0038] The disposable planer eliminates the touch screen in existing medical devices and sets control buttons during surgery to achieve control purposes.

[0039] The pressure-sensitive button 500 can be divided into multiple gears, or can be provided in the form of multiple pressure-sensitive buttons 500. The specific structure and working principle of the battery 400 are common knowledge in the art and are well known to those skilled in the art, so no further details will be given here.

[0040] The outer blade tube 320 defines an outer cutting window (not shown), while the inner blade tube 310 defines an inner cutting window (not shown). The inner blade tube 310 is rotatably mounted within the outer blade tube 320. The inner blade tube 310 has an inner cutting window at its front end for cutting tissue protruding through the outer cutting window. The drive shaft 210 rotates the inner blade tube 310, thereby causing the inner and outer cutting windows to engage in relative shearing motion. The cutting edge on one side of the inner cutting window severs tissue protruding through the outer cutting window. The inner blade tube 310 has a closed position, in which the outer cutting window is closed (i.e., the inner cutting window on the inner blade tube 310 is offset from the outer cutting window on the outer blade tube 320), and an open position, in which the outer cutting window is open (i.e., the inner cutting window on the inner blade tube 310 is opposite the outer cutting window on the outer blade tube 320). The specific structure and operating principle of the planer head 300 are common knowledge in the art and are well known to those skilled in the art, and will not be elaborated upon here.

[0041] In this embodiment, the handle housing 100 has a receiving cavity and a housing hole connected to the receiving cavity. The drive unit 200 and the battery 400 are arranged in the receiving cavity, and the inner blade tube 310 passes through the housing hole. The disposable planer also includes a sealing bearing 700, which is used to seal the gap between the inner blade tube 310 and the housing hole. By setting the receiving cavity and the housing hole, the drive unit 200 and the battery 400 can be reasonably placed. At the same time, the use of the sealing bearing 700 effectively seals the gap between the inner blade tube 310 and the housing hole, thereby enhancing the sealing performance of the disposable planer. The inner side of the sealing bearing 700 is fixed to the inner blade tube 310, and the outer side is fixed to the handle housing 100. The sealing bearing 700 not only achieves the purpose of transmitting the rotational speed, but also serves to separate the water environment and the non-water environment at the housing hole. This design utilizes a sealed bearing 700 to effectively seal the inner blade tube 310 from the housing bore. This ensures smooth operation of the inner blade tube 310 by the drive unit 200 while minimizing the risk of foreign matter entering the housing cavity from the external environment. Compared to conventional assembled planers, this disposable planer offers improved transmission performance and sealing.

[0042] The inner blade tube 310 is provided with a discharge hole on one side close to the transmission shaft 210 , and foreign matter in the inner blade tube 310 is discharged into the negative pressure pipeline 111 through the discharge hole.

[0043] In this embodiment, the drive unit 200 is connected to the inner blade tube 310 via a sealed bearing 700. In other implementations of this embodiment, the drive unit 200 utilizes a screw-nut meshing mechanism, a rack-and-pinion meshing mechanism, or an inner and outer bevel gear meshing mechanism to form a transmission mechanism. The purpose of optimizing the transmission mechanism is to optimize the structure and maximize transmission efficiency. The specific transmission structure is determined by those skilled in the art based on practical engineering practices. The determination method is common knowledge in the art and is well understood by those skilled in the art, so it will not be elaborated on here.

[0044] Furthermore, the inner ring of the sealed bearing 700 is in contact with the outer wall of the inner blade tube 310, while the outer ring of the sealed bearing 700 is in contact with the wall of the housing hole. The above definition further clarifies the structure and function of the sealed bearing 700. Its inner ring is in contact with the outer wall of the inner blade tube 310, while its outer ring is in contact with the wall of the housing hole, effectively ensuring the sealing and stability of the planer during operation.

[0045] Exemplarily, the handle housing 100 includes a housing body 110 and a housing back cover 120 detachably connected to the housing body 110. The housing body 110 is provided with a receiving groove, and the receiving groove and the housing back cover 120 form a receiving cavity. Specifically, the receiving groove is provided on one side of the housing body 110 and is a V-shaped slot, and the housing back cover 120 is snap-fitted into the receiving groove.

[0046] Through the separate design of the casing main body 110 and the casing back cover 120, the structure of the handle shell 100 is planned in detail, making the replacement of the battery 400 and the drive unit 200 more convenient. At the same time, the accommodating cavity surrounded by the accommodating groove and the casing back cover 120 ensures the integration and convenience of use of the handle shell 100.

[0047] Furthermore, the disposable planer blade includes a sealing ring 800. The rear cover 120 is partially inserted into the receiving groove, and the sealing ring 800 is sandwiched between the outer wall of the rear cover 120 and the wall of the receiving groove. The sealing ring 800 fills the gap between the rear cover 120 and the receiving groove, providing a sealing and waterproofing effect. The addition of the sealing ring 800 further enhances the seal between the rear cover 120 and the receiving groove, effectively preventing the ingress of dust and liquids, and enhancing the lifespan and safety of the disposable planer blade.

[0048] Furthermore, the rear cover 120 is provided with a shock-absorbing foam 121, which presses against the drive unit 200 and / or battery 400. Specifically, the shock-absorbing foam 121 is placed in the cover hole of the rear cover 120 to reduce vibration and noise of the motor and battery 400. The provision of the shock-absorbing foam 121 effectively absorbs the vibration generated by the drive unit 200 and battery 400 during operation, reducing the noise of the disposable planer and improving operating comfort.

[0049] Illustratively, the drive unit 200 includes a motor and a circuit board communicatively connected to the motor. The circuit board includes a sensor for a pressure-sensitive button 500 for efficient command transmission. The motor and circuit board are conventional structures in the art. Their configuration and operating principles are common knowledge within the art and are well known to those skilled in the art, so they will not be elaborated upon here.

[0050] The sidewalls of the housing are equipped with slots for securing the circuit board. The motor is screwed into the housing, and the battery 400 is securely installed within the housing. By defining the specific structure within the housing, the placement of the drive unit 200 and battery 400 can be planned, making it easier to insert and secure each component within the handle while also preventing the drive unit 200 and battery 400 from rotating.

[0051] The handle housing 100 is made of engineering plastic, which is lightweight, strong, and corrosion-resistant, thus improving the user experience and durability of the disposable planer.

[0052] In this embodiment, the engineering plastic selected is ABS plastic. In other implementations of this embodiment, the engineering plastic selected is PP, PE, K plastic, or PC. The selection of the engineering plastic material is determined by those skilled in the art based on actual project requirements. The method for determining the material is common knowledge in the art and is well understood by those skilled in the art, so it will not be elaborated on here.

[0053] Exemplarily, the planer head 300 is made of stainless steel. The stainless steel planer head 300 has excellent corrosion resistance and cutting performance, ensuring the stability and safety of the disposable planer during surgery. The material selection for the planer head 300 is determined by those skilled in the art based on practical engineering practices. The method for determining this material is common knowledge and well-understood by those skilled in the art, and will not be elaborated upon here.

[0054] The disposable planer is used to connect the negative pressure suction tube 600 and the negative pressure suction system. Both ends of the negative pressure suction tube 600 are detachably connected to the negative pressure pipeline 111 and the negative pressure suction system respectively.

[0055] The negative pressure suction tube 600 is used to achieve a detachable connection between the negative pressure suction system and the disposable planer, thereby ensuring the suction ability inside the inner knife tube 310 while achieving the rapid disassembly and assembly of the disposable planer, thereby improving the cleanliness of the surgical environment, reducing the difficulty of subsequent cleaning operations, reducing the risk of infection during the operation, and ensuring the efficient and safe conduct of the surgical process.

[0056] In this embodiment, a flow rate regulator 900 is provided on the negative pressure suction tube 600. By providing the flow rate regulator 900 on the negative pressure suction tube 600, the suction volume of the negative pressure suction system can be effectively adjusted through the negative pressure suction tube 600, and the flow rate within the negative pressure suction tube 600 can be controlled to meet different surgical requirements, thereby improving the practicality and flexibility of the disposable planer.

[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Disposable planer, characterized in that: include: A handle housing (100); The planer head (300) comprises an inner blade tube (310) and an outer blade tube (320) sleeved on the inner blade tube (310), wherein the outer blade tube (320) is fixedly connected to the handle housing (100); A drive unit (200) is provided on the handle housing (100); a transmission shaft (210) is provided at the output end of the drive unit (200); the inner knife tube (310) is fixedly connected to the transmission shaft (210); the transmission shaft (210) is used to drive the inner knife tube (310) to rotate around the axis of the inner knife tube (310); the handle housing (100) is provided with a negative pressure pipeline (111); the negative pressure pipeline (111) is used to communicate with an external suction device; the external suction device is connected to the inner knife tube (310) through the negative pressure pipeline (111); the external suction device is used to suction the interior of the inner knife tube (310); a battery (400), provided in the handle housing (100), the battery (400) being used to supply power to the drive unit (200); A pressure-sensitive button (500) is provided on the driving unit (200), and the pressure-sensitive button (500) is used to control the start, stop and speed regulation of the driving unit (200).

2. The disposable planer according to claim 1, characterized in that: The handle housing (100) has a receiving cavity and a housing hole communicating with the receiving cavity; the drive unit (200) and the battery (400) are arranged in the receiving cavity; the inner blade tube (310) passes through the housing hole; the disposable planer further includes a sealed bearing (700), and the sealed bearing (700) is used to seal a gap between the inner blade tube (310) and the housing hole.

3. The disposable planer according to claim 2, characterized in that: The inner ring of the sealing bearing (700) is fitted to the outer wall of the inner knife tube (310), and the outer ring of the sealing bearing (700) is fitted to the hole wall of the housing hole.

4. The disposable planer according to claim 2, characterized in that: The handle housing (100) comprises a housing body (110) and a housing back cover (120) detachably connected to the housing body (110); the housing body (110) is provided with a receiving groove; the receiving groove and the housing back cover (120) form the receiving cavity.

5. The disposable planer according to claim 4, characterized in that: The disposable planer further comprises a sealing ring (800), the housing rear cover (120) is partially inserted into the accommodating groove, and the sealing ring (800) is sandwiched between the outer wall of the housing rear cover (120) and the groove wall of the accommodating groove.

6. The disposable planer according to claim 5, characterized in that: A shock-absorbing foam (121) is provided on the housing rear cover (120), and the shock-absorbing foam (121) presses against the drive unit (200) and / or the battery (400).

7. The disposable planer according to claim 1, characterized in that: The handle housing (100) is made of engineering plastic.

8. The disposable planer according to claim 1, characterized in that: The material of the planer head (300) is stainless steel.

9. The disposable planer according to any one of claims 1 to 8, characterized in that: The disposable planer is used to connect the negative pressure suction tube (600) and the negative pressure suction system, and the two ends of the negative pressure suction tube (600) are detachably connected to the negative pressure pipeline (111) and the negative pressure suction system respectively.

10. The disposable planer according to claim 9, characterized in that: The negative pressure suction tube (600) is provided with a flow rate regulator (900).

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