A knife with a blade cartridge guard

Abstract

This application discloses a cutting tool with a blade holder protective sleeve, including a cutting tool assembly and a blade holder assembly. The cutting tool assembly has a blade head holder, and the blade holder assembly is adapted to be mounted on the blade head holder. The blade holder assembly includes a first protective shell and a second protective shell connected to each other. The first protective shell is provided with a socket structure, which is adapted to be fixedly connected to the blade head holder through the socket structure. The socket structure is adapted to accommodate at least a portion of the blade head holder. The second protective shell is adapted to mate with the first protective shell to accommodate a portion of the blade head holder. The second protective shell has a storage cavity, which is adapted to store at least one blade. The storage cavity is adapted to be opened when the second protective shell is separated from the first protective shell. This application can protect the cutting tool and the blade on the cutting tool through the protective sleeve. At the same time, the protective sleeve has a blade storage function, which can realize convenient and quick replacement and storage of the blade.

Description

Technical Field

[0001] This application relates to the field of tool knife technology, specifically to a tool with a blade holder protective sleeve. Background Technology

[0002] In tooling systems involving replaceable blades, the protection, storage, and easy access of blades have always been the focus of industry attention. As modern manufacturing and daily use continue to increase the requirements for the safety and convenience of tools, traditional blade protection and storage methods have gradually revealed many shortcomings.

[0003] Currently, the main types of blade protection, storage, and retrieval technologies on the market include: 1. Independent blade protectors, which use independent plastic or rubber protectors to cover the blade edge through a simple sleeve connection; 2. Integrated knife storage structures, which use an integrated storage design to store spare blades inside the handle or in a dedicated storage box.

[0004] Independent blade protectors are prone to falling off in actual use and cannot form a stable connection with the blade body, requiring an additional container for blade storage; while integrated blade storage structures are too complex to design, inconvenient to disassemble and assemble, and have limited storage space.

[0005] However, existing blade protection, storage, and retrieval technologies have the following drawbacks: existing technologies typically use independent blade protectors and integrated tool storage structures separately or in combination, but it is still difficult to solve the problem that blade storage and retrieval are too cumbersome and affect tool usage efficiency. Summary of the Invention

[0006] One object of this application is to provide a knife with a blade box protective sleeve that has the functions of protecting the knife and storing the blade, and facilitates quick replacement and storage of the blade.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows: a cutting tool with a blade holder protective sleeve, comprising a cutting tool assembly and a blade holder assembly. The cutting tool assembly has a blade head holder, and the blade holder assembly is adapted to be mounted on the blade head holder. The blade holder assembly includes a first protective shell and a second protective shell connected to each other. The first protective shell is provided with a socket structure, and the first protective shell is adapted to be fixedly connected to the blade head holder through the socket structure. The socket structure is adapted to accommodate at least a portion of the blade head holder. The second protective shell is adapted to mate with the first protective shell to cooperate with the socket structure in accommodating a portion of the blade head holder. The second protective shell has a storage cavity, which is adapted to store at least one blade. The storage cavity is adapted to be opened when the second protective shell is separated from the first protective shell.

[0008] In some embodiments, the front end of the blade holder is adapted to be fitted with a blade, and a slot communicating with the insertion structure is adapted to be formed between the first protective shell and the second protective shell after mating. The insertion structure is adapted to accommodate the front end of the blade holder, and the blade fitted at the front end of the blade holder is adapted to be inserted into the slot. The depth of the slot is adapted to the width of the storage cavity.

[0009] In some embodiments, a protrusion is provided on the first side of the front end of the blade holder, the front end of the blade holder facing and the opening direction of the socket structure are adapted to the front side of the protrusion, the socket structure includes an anti-disengagement part located on the first side of the first protective shell, the shape of the anti-disengagement part is adapted to the shape of the protrusion, when the front end of the blade holder is accommodated in the socket structure, the anti-disengagement part and the protrusion are engaged along the joint direction of the blade holder and the socket structure; the outer end of the anti-disengagement part extends away from the first protective shell to form a force-bearing part, the first protective shell has a deformation groove at the inner end connection of the anti-disengagement part along the extension direction of the anti-disengagement part; the inner side of the force-bearing part is arc-shaped protrusion; the first protective shell is provided with at least one guide block in the slot, the guide block is adapted to support the blade entering the slot; the contact position between the guide block and the blade entering the slot is close to the blade holder.

[0010] In some embodiments, the second protective shell has a knife outlet on one side that communicates with the storage cavity, and a protective wall portion protrudes from the corresponding side of the first protective shell. When the first protective shell and the second protective shell are engaged, the protective wall portion is adapted to close the knife outlet.

[0011] In some embodiments, the second protective shell is provided with a locking block at the blade outlet, and the protective wall is provided with a locking groove, the locking block and the locking groove being adapted to cooperate and be fixed.

[0012] In some embodiments, the second protective shell has at least one operating port on the side of the storage cavity near the first protective shell, and a portion of the blade in the storage cavity is adapted to be exposed in the operating port; the storage cavity is adapted to store multiple blades, and the stacking direction of the blades is perpendicular to the plane where the operating port is located.

[0013] In some embodiments, the first protective shell and the second protective shell are rotatably connected, and the second protective shell is adapted to rotatably engage with the first protective shell; at least one snap-fit ​​connection structure is provided between the first protective shell and the second protective shell; the second protective shell has at least one observation port on the side of the storage cavity away from the first protective shell.

[0014] In some embodiments, the cutting tool assembly further includes a handle portion rotatably connected to the cutting head seat. A positioning device is provided between the handle portion and the cutting head seat. The positioning device includes a positioning knob, at least one positioning block, and at least one positioning groove. The positioning block and the positioning groove are respectively disposed on the handle portion and the cutting head seat and are distributed circumferentially along the rotational connection axis of the handle portion and the cutting head seat. The positioning block and the positioning groove are adapted to engage with each other. The positioning knob is adapted to move along the rotational connection axis to restrict the positioning block and the positioning groove from disengaging or to release the restriction on the positioning block and the positioning groove.

[0015] In some embodiments, the cutter head seat has a movable channel along the direction of the rotating connecting shaft, the positioning block is movably disposed in the movable channel, the positioning groove is formed on the handle, the upper end of the movable channel is connected to the positioning knob, a first elastic element is disposed between the positioning knob and the handle, the first elastic element covers the upper end of the movable channel, and the upper end of the positioning block is adapted to abut against the first elastic element; the upper end of the positioning block always extends out of the upper end of the movable channel and abuts against the first elastic element; a replaceable positioning plate is disposed on the handle, and the positioning groove is formed on the positioning plate; the positioning plate and the handle are fixed together in the circumferential direction of the rotating connecting shaft by a plurality of positioning holes and positioning protrusions, at least some of the positioning holes and positioning protrusions are unevenly distributed so that the positioning plate and the handle have a unique engagement state.

[0016] In some embodiments, the number of positioning slots is an integer multiple of the number of positioning blocks, and the positions of the positioning slots are adaptively distributed according to the positions of the positioning blocks; the positioning blocks are provided with transition surfaces on both sides of the circumferential direction of the rotating connecting shaft, and the transition surfaces are adapted to guide the positioning blocks in and out of the positioning slots.

[0017] In some embodiments, the cutter head holder includes a first clamping plate portion and a second clamping plate portion. The front ends of the first clamping plate portion and the second clamping plate portion are adapted to clamp the blade. At least one fastener is connected between the first clamping plate portion and the second clamping plate portion. The fastener has an operating end, which is embedded in the second clamping plate portion. A friction structure is provided on the periphery of the operating end, and the periphery of the portion of the operating end with the friction structure protrudes from the side of the second clamping plate portion. A tool mating groove is provided on the upper side of the fastener. A second elastic member is provided between the first clamping plate portion and the second clamping plate portion, and the second elastic member is adapted to drive the first clamping plate portion and the second clamping plate portion away from each other.

[0018] Compared with the prior art, the beneficial effects of this application are as follows: 1. The knife with blade holder protective cover of this application is designed with the protective cover as a blade holder structure, so that users can easily take out the blade through the protective cover. The original two parts of the protective cover and blade storage box are optimized into a single part, which is convenient to carry, store and place, and can reduce the probability of loss of parts. At the same time, this application also designs the protective cover as an openable structure and links it to the blade taking operation of the blade holder. In conjunction with the original protective design of the protective cover, it can protect the knife when the protective cover is closed, and allow the knife blade installation to be observed and the blade to be taken out when the protective cover is open, thereby improving the convenience of operation.

[0019] 2. The cutting tool with a blade box protective sleeve of this application provides a cutting tool assembly with replaceable blades and a rotatable cutting head seat. The cutting tool assembly can adjust the rotation angle between itself and the handle by controlling the positioning knob. This rotation angle can be locked by the positioning knob. After locking, the overall structure is stable and the rotating structure is not easy to loosen or deflect. The positioning plate is modularly designed and can be quickly replaced after wear. Alternatively, positioning plates with different numbers and positions of positioning slots can be produced according to the usage requirements of the cutting tool for replacement, so as to facilitate the change and adjustment of the rotation mode of the positioning device. Attached Figure Description

[0020] Figure 1 This is an overall structural view according to a preferred embodiment of the present application.

[0021] Figure 2 This is a structural view of the blade holder with the blade installed and the blade box assembly opened and removed according to a preferred embodiment of this application.

[0022] Figure 3 This is a structural view of the blade box assembly according to a preferred embodiment of the present application when it is removed.

[0023] Figure 4 This is a structural view of the blade box assembly according to a preferred embodiment of the present application when it is opened.

[0024] Figure 5 This is a structural view of the blade box assembly when closed according to a preferred embodiment of this application.

[0025] Figure 6 This is a cross-sectional view of a blade holder with a blade mounted and placed in a blade box assembly according to a preferred embodiment of this application.

[0026] Figure 7 This is an overall structural view of the tool assembly with the blade installed according to a preferred embodiment of this application.

[0027] Figure 8 This is an exploded view of a cutting tool assembly according to a preferred embodiment of this application.

[0028] Figure 9 This is a top view of a cutting tool assembly according to a preferred embodiment of this application.

[0029] Figure 10 This is a preferred embodiment according to this application. Figure 9 A cross-sectional view along the AA direction.

[0030] Figure 11 This is a view showing the positioning device and handle in conjunction with a preferred embodiment of this application.

[0031] Figure 12 This is a preferred embodiment according to this application. Figure 9 A cross-sectional view of the cutter head holder section along the BB direction.

[0032] In the diagram: 1. Tool assembly; 11. Tool holder; 111. Protrusion; 112. Movable channel; 113. First clamping plate; 114. Second clamping plate; 115. Fastener; 1151. Operating end; 1152. Tool mating groove; 116. Second elastic element; 117. Drop structure; 12. Handle; 121. Positioning protrusion; 13. Positioning device; 131. Positioning knob; 132. Positioning block; 1321. Transition surface; 133. Positioning groove; 14. 1. Elastic element; 15. Positioning plate; 151. Positioning hole; 2. Blade box assembly; 21. First protective shell; 211. Insertion structure; 2111. Anti-detachment part; 2112. Force-bearing part; 212. Deformation groove; 213. Wall protection part; 214. Slot; 22. Second protective shell; 221. Storage cavity; 222. Blade outlet; 223. Locking block; 224. Operation port; 225. Observation port; 23. Slot; 231. Guide block; 24. Snap-fit ​​connection structure; 3. Blade. Detailed Implementation

[0033] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0035] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0037] The following description, in conjunction with the accompanying drawings, further illustrates this application: like Figures 1 to 12 As shown, this application provides a knife with a blade box protective sleeve, including a knife assembly 1 and a blade box assembly 2. The knife assembly 1 and the blade box assembly 2 are suitable for sale together. The blade box assembly 2 is suitable for storing the blade 3 used by the knife assembly 1, and at the same time can serve as a protective sleeve to protect the knife assembly 1 and / or the blade 3 installed on it.

[0038] The tool assembly 1 has a tool head holder 11, and the blade box assembly 2 is adapted to be mounted on the tool head holder 11. The blade box assembly 2 and the tool head holder 11 are detachably connected. The blade box assembly 2 is adapted to be removed from the tool head holder 11 and detached, thereby releasing the protection of the tool head holder 11. At the same time, the limitations on the use of the tool head holder 11 and the structural interference of the blade box assembly 2 can be reduced or even eliminated.

[0039] like Figures 1 to 3 In the illustrated embodiment, the blade box assembly 2 includes a first protective shell 21 and a second protective shell 22 connected to each other. The first protective shell 21 is provided with a socket structure 211, which is adapted to be fixedly connected to the blade holder 11 through the socket structure 211. The socket structure 211 is adapted to accommodate at least a portion of the blade holder 11. The second protective shell 22 is adapted to mate with the first protective shell 21 to accommodate a portion of the blade holder 11 through the socket structure 211. The second protective shell 22 is provided with a storage cavity 221, which is adapted to store at least one blade 3. The storage cavity 221 is adapted to be opened when the second protective shell 22 is separated from the first protective shell 21.

[0040] The reason this application designs an independent insertion structure 211 on the first protective shell 21 to be fixedly connected to the blade holder 11, instead of combining the first protective shell 21 and the second protective shell 22 to form an insertion port fixedly connected to the blade holder 11, is one of the purposes of enabling the independent use of the first protective shell 21 and the second protective shell 22. When the first protective shell 21 is fixed to the blade holder 11 to protect it, the user can quickly retrieve the blade 3 from the storage cavity 221 on the first protective shell 21 by opening the second protective shell 22 without affecting the protective effect. With the components maintaining the connection, the user can hold the tool assembly 1 to take the blade 3, making the operation more convenient and easier. On this basis, while ensuring the protection of the tool head holder 11 and / or the blade 3 installed on it, the user can also open the second protective shell 22 to observe and confirm the status of the tool head holder 11 and / or the blade 3 installed on it. This allows for timely detection of problems such as damage to the tool head holder 11 and / or the blade 3 installed on it, and timely replacement and maintenance. In addition, it can also eliminate the defect that the combination of the first protective shell 21 and the second protective shell 22 can easily become loose and detach when connected to the tool head holder 11.

[0041] The design of the second protective shell 22 fitting into the first protective shell 21 can help the first protective shell 21 increase its protective coverage and achieve better dust protection.

[0042] This application also optimizes the structure of the storage cavity 221, so that the use of the storage cavity 221 is associated with the state between the first protective shell 21 and the second protective shell 22. When the first protective shell 21 is combined with the second protective shell 22, the storage cavity 221 is automatically closed. When the first protective shell 21 is separated from the second protective shell 22, the storage cavity 221 is automatically opened to facilitate the removal and placement of the blade 3. This design eliminates the need for an additional sealing structure, reduces the overall structural complexity, and reduces the number of operations required to remove and place the blade 3.

[0043] In some embodiments, the socket structure 211 is semi-open, with the open portion of the socket structure 211 located on the mating side of the second protective shell 22. The semi-open socket structure 211 has stronger deformation capability and can obtain a certain degree of elasticity depending on its material, thereby facilitating its cooperation with the blade holder 11.

[0044] like Figures 1 to 3 and Figure 6 In the embodiment shown, the front end of the blade holder 11 is adapted to be fitted with a blade 3, and a slot 23 communicating with the insertion structure 211 is adapted to be formed between the first protective shell 21 and the second protective shell 22 after being engaged. The insertion structure 211 is adapted to accommodate the front end of the blade holder 11, and the blade 3 fitted at the front end of the blade holder 11 is adapted to be inserted into the slot 23. The depth of the slot 23 is adapted to the width of the storage cavity 221.

[0045] The purpose of this design is to allow the blade 3 mounted on the front end of the blade holder 11 to be accommodated and protected by the blade box assembly 2. At the same time, since the blade 3 is placed in the slot 23 formed by the cooperation of the first protective shell 21 and the second protective shell 22, the blade 3 in the slot 23 can be easily observed when the second protective shell 22 is separated and opened, without having to remove the entire blade box assembly. Furthermore, based on the connection state between the blade box assembly 2 and the blade holder 11, the blade 3 can be stably placed in the slot 23 on the first protective shell 21 whether the second protective shell 22 is open or closed.

[0046] like Figures 1 to 5 In the illustrated embodiment, a protrusion 111 is provided on the first side of the front end of the blade holder 11. The front end of the blade holder 11 and the opening direction of the insertion structure 211 are adapted to the front side of the protrusion 111. Specifically, the front end of the blade holder 11 is inclined along the extension direction of the front side of the protrusion 111, and the opening direction of the insertion structure 211 is parallel to the extension direction of the front side of the protrusion 111. The insertion structure 211 can engage with the blade holder 11 along the extension direction of the front side of the protrusion 111, so that the side of the insertion structure 211 can smoothly cooperate with the protrusion 111.

[0047] like Figures 1 to 5 In the embodiment shown, the socket structure 211 includes an anti-detachment part 2111 located on the first side of the first protective shell 21. The shape of the anti-detachment part 2111 is adapted to the shape of the protrusion 111. When the front end of the blade holder 11 is accommodated in the socket structure 211, the anti-detachment part 2111 and the protrusion 111 are engaged along the joint direction of the blade holder 11 and the socket structure 211.

[0048] In some embodiments, both the anti-detachment part 2111 and the protrusion 111 are arc-shaped, which can improve the stress resistance of the anti-detachment part 2111 and the protrusion 111 and improve the smoothness of the anti-detachment part 2111 when it detaches from the protrusion 111.

[0049] It is understandable that the shape of the anti-detachment part 2111 and the protrusion 111 can also be a conventional shape found in other existing technologies that can produce a snap-fit ​​effect.

[0050] like Figure 4 and Figure 5In the embodiment shown, the outer end of the anti-detachment part 2111 extends away from the first protective shell 21 to form a force-receiving part 2112. The force-receiving part 2112 is adapted to form a gap with the first protective shell 21 and the second protective shell 22 so that the user can insert his finger to push the force-receiving part 2112 outward and drive the anti-detachment part 2111 away from the protrusion 111. With the design that the front end of the blade holder 11 is oriented and the opening direction of the insertion structure 211 is adapted to the front side of the protrusion 111, the blade box assembly 2 can be smoothly disengaged along the front end of the blade holder 11 in a deflection manner, which can effectively reduce the difficulty for the user to disassemble and assemble the blade box assembly 2.

[0051] like Figure 4 In the embodiment shown, the first protective shell 21 has a deformation groove 212 at the inner end connection of the anti-detachment part 2111 along the extension direction of the anti-detachment part 2111. The main purpose of setting the deformation groove 212 is to increase the deformation range and elastic deformation capability of the anti-detachment part 2111, reduce the difficulty of the anti-detachment part 2111 disengaging from the protrusion 111, reduce the user's operating difficulty, and increase the service life of the anti-detachment part 2111.

[0052] like Figure 4 and Figure 5 In the embodiment shown, the inner side of the force-bearing part 2112 is arc-shaped and protruding, which can further improve the structural strength of the force-bearing part 2112, thereby increasing its service life and increasing the user's operating comfort.

[0053] like Figure 4 and Figure 6 In the embodiment shown, the first protective shell 21 is provided with at least one guide block 231 in the slot 23. The guide block 231 is adapted to support the blade 3 entering the slot 23. The contact position between the guide block 231 and the blade 3 entering the slot 23 is close to the blade head seat 11, which can reduce the pressure deformation between the guide block 231 and the blade 3. This allows the guide block 231 to effectively support the blade 3 and improve the fit stability between the blade head seat 11 and the socket structure 211 by supporting the blade 3.

[0054] The number of guide blocks 231 can be set according to the width of the cutter head seat 11 and the length of the blade 3 to ensure that they can play a good supporting and fixing role.

[0055] like Figure 2 and Figure 4In the embodiment shown, the second protective shell 22 has a blade outlet 222 communicating with the storage cavity 221 on one side, and a protective wall portion 213 protrudes from the corresponding side of the first protective shell 21. When the first protective shell 21 and the second protective shell 22 are engaged, the protective wall portion 213 is adapted to close the blade outlet 222. Specifically, the blade outlet 222 is adapted to be embedded into the inner side of the protective wall portion 213 to achieve closure. The blade 3 in the storage cavity 221 cannot slide out from the blade head due to the obstruction of the protective wall portion 213. At the same time, the protective wall portion 213 has sufficient thickness and structural strength to overcome the contact cutting of the blade 3 in the storage cavity 221.

[0056] like Figure 4 In the embodiment shown, the second protective shell 22 is provided with a locking block 223 at the blade outlet 222 and a locking groove 214 is provided on the protective wall portion 213. The locking block 223 and the locking groove 214 are suitable for engaging and fixing, so that the second protective shell 22 is restricted in the direction of disengaging from the first protective shell 21, thus preventing the first protective shell 21 and the second protective shell 22 from separating arbitrarily.

[0057] like Figure 2 and Figure 4 In the embodiment shown, the protective wall portion 213 and the anti-detachment portion 2111 are integrally formed. The protective wall portion 213 extends towards the cutter head seat 11 to form the anti-detachment portion 2111. Combined with the design of the deformation groove 212, the protective wall portion 213 has a certain elastic deformation capability, so that the locking block 223 and the locking groove 214 can be released after being subjected to a certain external force, reducing the difficulty for the user to separate the second protective shell 22 from the first protective shell 21.

[0058] like Figure 4 In the embodiment shown, the second protective shell 22 has at least one operating port 224 on the side of the storage cavity 221 near the first protective shell 21. A portion of the blade 3 in the storage cavity 221 is adapted to be exposed in the operating port 224. When the first protective shell 21 and the second protective shell 22 are engaged, the operating port 224 can be hidden between the first protective shell 21 and the second protective shell 22. The hidden design of the operating port 224 can achieve better waterproof and dustproof effect. When the second protective shell 22 is opened, the user can contact the blade 3 in the storage cavity 221 through the operating port 224 and control the blade 3 to move out from the blade outlet 222.

[0059] In some embodiments, the storage cavity 221 is adapted to store multiple blades 3, and the stacking direction of the blades 3 is perpendicular to the plane where the operation port 224 is located. The user can only touch the blade 3 closest to the operation port 224 and exposed in the operation port 224 at a time. When the blade 3 is taken out, the blade 3 below can be exposed in the operation port 224, thereby realizing the orderly retrieval of the blades 3.

[0060] like Figures 1 to 5In the illustrated embodiment, the first protective shell 21 and the second protective shell 22 are rotatably connected. The second protective shell 22 is adapted to rotatably engage with the first protective shell 21. The rotatable connection method of the first protective shell 21 and the second protective shell 22 includes common connection methods in the prior art such as connection by rotating pin and flexible connection. The rotatable connection side of the first protective shell 21 and the second protective shell 22 is preferably on the long side away from the cutter head seat 11. The second protective shell 22 has sufficient unfolding space on this long side, while ensuring the connection stability between it and the first protective shell 21, and ensuring sufficient rotational service life.

[0061] like Figure 4 and Figure 5 In the illustrated embodiment, at least one snap-fit ​​connection structure 24 is provided between the first protective shell 21 and the second protective shell 22 to strengthen the connection between the first protective shell 21 and the second protective shell 22. In this application, the long sides of the first protective shell 21 and the second protective shell 22 are rotatably connected, and the cutting edge 222 is located on the short side of one side of the first protective shell 21 and the second protective shell 22, and is connected and fixed by the snap-fit ​​block 223 and the snap-fit ​​groove 214. Therefore, the snap-fit ​​connection structure 24 can be arranged on the other short side of the first protective shell 21 and the second protective shell 22, so that the first protective shell 21 and the second protective shell 22 can form a stable overall connection.

[0062] like Figure 5 In the embodiment shown, the second protective shell 22 has at least one observation port 225 on the side of the storage cavity 221 away from the first protective shell 21. The observation port 225 should not be too large. The shape, size and position of the observation port 225 should ensure a certain degree of waterproof and dustproof performance. The user can easily observe the number of blades 3 in the storage cavity 221 through the observation port 225 so as to replenish them in time.

[0063] like Figures 7 to 12 As shown, the tool assembly 1 also includes a handle portion 12, which is rotatably connected to the tool head seat 11. A positioning device 13 is provided between the handle portion 12 and the tool head seat 11. The positioning device 13 includes a positioning knob 131, at least one positioning block 132, and at least one positioning groove 133. The positioning block 132 and the positioning groove 133 are respectively disposed on the handle portion 12 and the tool head seat 11 and are distributed circumferentially along the rotational connection axis of the handle portion 12 and the tool head seat 11. The positioning block 132 and the positioning groove 133 are adapted to engage with each other. The positioning knob 131 is adapted to move along the rotational connection axis to restrict the positioning block 132 and the positioning groove 133 from disengaging or to release the restriction on the positioning block 132 and the positioning groove 133.

[0064] In this application, the rotation plane of the cutter head holder 11 is parallel to the plane on which the blade 3 is mounted on the cutter head holder 11, which makes it convenient for the user to adjust the angle of the cutter head holder 11 and clean the surface of the object from different directions.

[0065] The positioning device 13 of this application strengthens the rotational positioning strength between the handle 12 and the cutter head seat 11 by the engagement of the positioning block 132 and the positioning groove 133. During long-term use, the rotational fastening effect between the handle 12 and the cutter head seat 11 can be maintained and is not easily weakened.

[0066] Specifically, the cutter head holder 11 has a movable channel 112 along the direction of the rotating connecting shaft. The positioning block 132 is movably disposed in the movable channel 112. The positioning groove 133 is provided on the handle part 12. The upper end of the movable channel 112 is connected to the positioning knob 131. The user can operate the positioning knob 131 to rotate. When the positioning knob 131 rotates, it will move closer to or away from the cutter head holder 11. When the positioning knob 131 is close to the cutter head holder 11, it can abut against the positioning block 132 and push the positioning block 132 into the positioning groove 133, so as to prevent the positioning block 132 from coming out of the positioning groove 133 and achieve stable positioning.

[0067] like Figure 8 , Figure 10 and Figure 11 In the embodiment shown, a first elastic element 14 is provided between the positioning knob 131 and the handle portion 12. The first elastic element 14 covers the upper end of the movable channel 112. The upper end of the positioning block 132 is adapted to abut against the first elastic element 14. The first elastic element 14 is used to prevent hard contact between the positioning block 132 and the positioning knob 131, and to protect the structure of the positioning block 132 and the positioning knob 131 from damage.

[0068] like Figure 8 and Figure 10 In the embodiment shown, the positioning knob 131 is connected to a nut arranged on the other side of the cutter head seat 11. The first elastic element 14 can also compensate for the play generated when the positioning knob 131 moves away from the cutter head seat 11, so that the nut can always be positioned on the cutter head seat 11, ensuring that the tightening and loosening operation of the positioning knob 131 can be carried out smoothly.

[0069] In some embodiments, in order to reduce the difficulty of rotating the positioning knob 131, a friction structure can be provided on the periphery of the positioning knob 131.

[0070] In some embodiments, the first elastic element 14 is a disc-shaped spring, which can maintain its coverage of the upper end of the active channel 112 after rotation, thereby increasing structural stability.

[0071] It is understandable that the first elastic element 14 can achieve a similar effect by using a spring with a washer.

[0072] like Figure 10 In the illustrated embodiment, the upper end of the positioning block 132 always extends out of the upper end of the movable channel 112 and abuts against the first elastic member 14. Specifically, this design means that whether the positioning block 132 is inserted into the positioning groove 133 or removed from the positioning groove 133, the upper end of the positioning block 132 can extend out of the upper end of the movable channel 112 and abut against the first elastic member 14, ensuring that the positioning block 132 can always elastically abut against the handle 12. When the cutter head seat 11 and the handle 12 rotate relative to each other, the positioning block 132 can be inserted into the positioning groove 133 immediately to achieve rotational positioning.

[0073] In some embodiments, a positioning groove 133 can be directly formed on the handle 12 to form an integrated structural design. The handle 12 is preferably made of high-strength stainless steel or other materials to ensure service life. This embodiment has fewer parts and is easy to assemble and disassemble.

[0074] like Figure 8 and Figure 10 In the illustrated embodiment, a replaceable positioning plate 15 can also be provided on the handle 12, and a positioning groove 133 is formed on the positioning plate 15. The structure of the positioning groove 133 is adjusted to a modular design. By manufacturing positioning plates 15 with different numbers and positions of positioning grooves 133, the cutter head 11 and the handle 12 can obtain different rotation levels and rotation modes to meet the needs of different users. When the positioning between the cutter head 11 and the handle 12 becomes loose or unclear, the positioning accuracy can be restored by replacing the positioning block 132 and the positioning plate 15, which has higher maintainability and reduces production and manufacturing costs as well as user costs.

[0075] like Figure 8 and Figure 11 In the embodiment shown, the positioning plate 15 and the handle 12 are fixed together by multiple positioning holes 151 and positioning protrusions 121 in the circumferential direction of the rotating connecting shaft. At least some of the positioning holes 151 and positioning protrusions 121 are unevenly distributed, which can guide the installation and prevent mistakenly, so that the positioning plate 15 and the handle 12 have a unique engagement state, ensuring that the positioning plate 15 can be stably installed and engaged on the handle 12 in a preset state, and avoiding assembly errors that would make it difficult to stably position the cutter head seat 11 and the handle 12.

[0076] In some embodiments, at least some of the positioning holes 151 and positioning protrusions 121 are asymmetrically distributed on both sides of the central axis of the handle portion 12.

[0077] In some embodiments, there are multiple positioning blocks 132. The more positioning blocks 132 there are, the stronger the stability of the fit between them and the positioning groove 133, and the better the rotation positioning effect.

[0078] In some embodiments, the number of positioning slots 133 is an integer multiple of the number of positioning blocks 132. The positions of the positioning slots 133 are adaptively distributed according to the positions of the positioning blocks 132. The multiple positioning slots 133 corresponding to the positioning blocks 132 serve as different gear positions. When the positioning blocks 132 are embedded in different positioning slots 133, the cutter head seat 11 can rotate relative to the handle 12 to different angles.

[0079] like Figure 11 In the embodiment shown, the positioning block 132 is provided with transition surfaces 1321 on both sides of the circumferential direction of the rotating connection shaft. The transition surfaces 1321 are suitable for contacting the positioning groove 133 and guiding the positioning block 132 in and out of the positioning groove 133, which can effectively reduce the jamming caused by the positioning block 132 entering the positioning groove 133 during rotation.

[0080] like Figure 11 In the embodiment shown, the transition surface 1321 is arc-shaped, resulting in a smoother transition and reducing contact wear between the positioning block 132 and the positioning groove 133.

[0081] like Figures 7 to 9 In the illustrated embodiment, the cutter head holder 11 includes a first clamping plate portion 113 and a second clamping plate portion 114. The front ends of the first clamping plate portion 113 and the second clamping plate portion 114 are adapted to clamp the blade 3. At least one fastener 115 is connected between the first clamping plate portion 113 and the second clamping plate portion 114. The fastener 115 has an operating end 1151, which is embedded in the second clamping plate portion 114. A friction structure is provided on the periphery of the operating end 1151. The periphery of the operating end 1151 with the friction structure protrudes from the side of the second clamping plate portion 114. The fastener 115 is embedded in the cutter head holder 11 to achieve a compact design. The user can control the fastener 115 to rotate through the part of the operating end 1151 of the fastener 115 that protrudes from the side of the second clamping plate portion 114. The friction structure can effectively reduce the difficulty of rotation, and the user can rotate and adjust the fastener 115 without the aid of tools.

[0082] like Figures 7 to 9 In the embodiment shown, in order to prevent the fastener 115 from being tightened too deeply and making it difficult for the user to adjust by hand by touching the friction structure, a tool mating groove 1152 is provided on the upper side of the operating end 1151 of the fastener 115. If necessary, the user can use a tool to insert into the tool mating groove 1152 to drive the fastener 115 to rotate, so as to realize the rotation control of the fastener 115.

[0083] In some embodiments, the tool fitting groove 1152 is a horizontal groove that can be rotated using a tool such as a flathead screwdriver.

[0084] In this application, a friction structure refers to a structure that can increase contact friction, such as providing a concave-convex structure on the periphery of the positioning knob 131 and the periphery of the operating end 1151.

[0085] like Figure 12 In the illustrated embodiment, a second elastic member 116 is provided between the first clamping plate portion 113 and the second clamping plate portion 114. The second elastic member 116 is adapted to drive the first clamping plate portion 113 and the second clamping plate portion 114 away from each other. When the fastener 115 is rotated to loosen, the first clamping plate portion 113 and the second clamping plate portion 114 are adapted to automatically move away from each other. At this time, the blade 3 can be inserted into the gap formed by the first clamping plate portion 113 and the second clamping plate portion 114 moving away from each other. The second elastic member 116 can help the user and reduce the difficulty of the user installing and replacing the blade 3.

[0086] In some embodiments, the second elastic element 116 is a helical spring.

[0087] like Figure 12 In the embodiment shown, a drop structure 117 is formed at the front end of the first clamping plate portion 113 and the front end of the second clamping plate portion 114. The cross section of the drop structure 117 is perpendicular to the mounting direction of the blade 3. The drop structure 117 is adapted to block the gap formed by the first clamping plate portion 113 and the second clamping plate portion 114 moving away from each other, so as to limit the blade 3 from penetrating the head holder 11. The drop structure 117 can position the mounting position of the blade 3 so that the mounting state of the blade 3 can be kept consistent.

[0088] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are only the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope of this application. All such changes and modifications fall within the scope of this application as claimed. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A cutting tool with a blade holder protective sleeve, characterized in that: The device includes a cutting tool assembly and a blade holder assembly. The cutting tool assembly has a blade holder adapted for mounting a blade. The blade holder assembly is adapted to be mounted on the blade holder. The blade holder assembly includes a first protective shell and a second protective shell connected to each other. The first protective shell is provided with a socket structure and is adapted to be fixedly connected to the blade holder through the socket structure. The socket structure is adapted to accommodate at least a portion of the blade holder. The second protective shell is adapted to mate with the first protective shell to accommodate a portion of the blade holder through the socket structure. The second protective shell has a storage cavity adapted to store at least one blade and is adapted to open when the second protective shell is separated from the first protective shell.

2. A cutting tool with a blade holder protective sleeve as described in claim 1, characterized in that: The front end of the blade holder is adapted to be fitted with a blade. The first protective shell and the second protective shell, after being engaged, are adapted to form a slot that communicates with the insertion structure. The insertion structure is adapted to accommodate the front end of the blade holder, and the blade fitted at the front end of the blade holder is adapted to be inserted into the slot. The depth of the slot is adapted to the width of the storage cavity.

3. A cutting tool with a blade holder protective sleeve as described in claim 2, characterized in that: The front end of the blade holder has a protrusion on its first side. The front end of the blade holder faces the same direction as the opening direction of the insertion structure as the front side of the protrusion. The insertion structure includes an anti-dislodgement part located on the first side of the first protective shell. The shape of the anti-dislodgement part is adapted to the shape of the protrusion. When the front end of the blade holder is accommodated in the insertion structure, the anti-dislodgement part and the protrusion part are engaged along the joint direction of the blade holder and the insertion structure. The outer end of the anti-dislodgement part extends away from the first protective shell to form a force-bearing part. The first protective shell has a deformation groove at the inner end connection of the anti-dislodgement part along the extension direction of the anti-dislodgement part. The inner side of the force-bearing part is arc-shaped and protruding. The first protective shell has at least one guide block in the slot. The guide block is adapted to support the blade entering the slot. The contact position between the guide block and the blade entering the slot is close to the blade holder.

4. A cutting tool with a blade holder protective sleeve as described in claim 1, characterized in that: The second protective shell has a knife outlet on one side that communicates with the storage cavity, and a protective wall portion protrudes from the corresponding side of the first protective shell. When the first protective shell and the second protective shell are aligned, the protective wall portion is adapted to close the knife outlet.

5. A cutting tool with a blade holder protective sleeve as described in claim 4, characterized in that: The second protective shell has a locking block at the blade outlet and a locking groove on the protective wall. The locking block and the locking groove are adapted to be connected and fixed together.

6. A cutting tool with a blade holder protective sleeve as described in claim 1, characterized in that: The second protective shell has at least one operating port on the side of the storage cavity near the first protective shell, and a portion of the blade in the storage cavity is adapted to be exposed in the operating port; the storage cavity is adapted to store multiple blades, and the stacking direction of the blades is perpendicular to the plane where the operating port is located.

7. A cutting tool with a blade holder protective sleeve as described in claim 1, characterized in that: The first protective shell and the second protective shell are rotatably connected, and the second protective shell is adapted to rotate and engage with the first protective shell; at least one snap-fit ​​connection structure is provided between the first protective shell and the second protective shell; at least one observation port is provided on the side of the storage cavity away from the first protective shell.

8. A cutting tool with a blade holder protective sleeve as described in claim 1, characterized in that: The cutting tool assembly further includes a handle portion, which is rotatably connected to the cutting head seat. A positioning device is provided between the handle portion and the cutting head seat. The positioning device includes a positioning knob, at least one positioning block, and at least one positioning groove. The positioning block and the positioning groove are respectively disposed on the handle portion and the cutting head seat, and are distributed circumferentially along the rotational connection axis of the handle portion and the cutting head seat. The positioning block and the positioning groove are adapted to engage with each other. The positioning knob is adapted to move along the rotational connection axis to restrict the positioning block and the positioning groove from disengaging, or to release the restriction on the positioning block and the positioning groove.

9. A cutting tool with a blade holder protective sleeve as described in claim 8, characterized in that: The cutter head holder has a movable channel along the direction of the rotating connecting shaft. The positioning block is movably disposed within the movable channel. The positioning groove is formed on the handle. The upper end of the movable channel is connected to the positioning knob. A first elastic element is disposed between the positioning knob and the handle. The first elastic element covers the upper end of the movable channel. The upper end of the positioning block is adapted to abut against the first elastic element. The upper end of the positioning block always extends beyond the upper end of the movable channel and abuts against the first elastic element. A replaceable positioning plate is disposed on the handle. The positioning groove is formed on the positioning plate. The positioning plate and the handle are fixed together in the circumferential direction of the rotating connecting shaft by multiple positioning holes and positioning protrusions. At least some of the positioning holes and positioning protrusions are unevenly distributed so that the positioning plate and the handle have a unique engagement state.

10. A cutting tool with a blade holder protective sleeve as described in claim 9, characterized in that: The number of positioning slots is an integer multiple of the number of positioning blocks, and the positions of the positioning slots are adaptively distributed according to the positions of the positioning blocks; the positioning blocks are provided with transition surfaces on both sides of the circumferential direction of the rotating connecting shaft, and the transition surfaces are adapted to guide the positioning blocks into and out of the positioning slots.

11. A cutting tool with a blade holder protective sleeve as described in claim 8, characterized in that: The cutter head holder includes a first clamping plate portion and a second clamping plate portion. The front ends of the first clamping plate portion and the second clamping plate portion are adapted to clamp the blade. At least one fastener is connected between the first clamping plate portion and the second clamping plate portion. The fastener has an operating end, which is embedded in the second clamping plate portion. A friction structure is provided on the periphery of the operating end, and the periphery of the part of the operating end with the friction structure protrudes from the side of the second clamping plate portion. A tool mating groove is provided on the upper side of the fastener. A second elastic member is provided between the first clamping plate portion and the second clamping plate portion, which is adapted to drive the first clamping plate portion and the second clamping plate portion away from each other.

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