A modular cutting tool

Abstract

The utility model provides a kind of combined cutter, including shell, several knife groups, tool rest, first drive assembly and second drive assembly.Shell includes main shell and auxiliary shell, main shell includes release area, and auxiliary shell is equipped with several knife outlets;Every knife group includes tool rest and blade, and tool rest includes stress part;Tool rest includes several knife areas, and every knife area houses a knife group;First drive assembly is suitable for driving tool rest rotates around rotation center axis, and then it can select one knife group to align release area and become target knife group;Second drive assembly includes push part and drive button, and push part can reciprocate in release area along the radial direction of main shell, and drive button can drive the blade of target knife group to extend or retract corresponding knife outlet by push part.The utility model realizes the quick switching of multiple knife groups by rotating tool rest, while ensuring that target knife group can stably switch between storage state and working state, to improve the functional integration, operation convenience and structural reliability of combined cutter.

Description

Technical Field

[0001] This utility model belongs to the field of kitchenware technology, and in particular relates to a combination knife. Background Technology

[0002] In daily life and work, combination knives are widely used because they can integrate multiple cutting functions and are easy to carry and store. For example, the combination of a fruit knife and various scrapers can meet the needs of peeling, cutting and other operations.

[0003] For example, Chinese patent application number CN201520567626.0 discloses a double-headed fruit knife. This knife includes a hollow blade barrel containing a movable slider. One end of the barrel houses a blade, and the other end houses a peeler. The user can operate a pusher connected to the slider to expose or retract the blade or peeler within the barrel. Other Chinese patents, CN202221282532.5 and CN202321126147.6, disclose a double-headed fruit knife with an integrated blade and peeler design. Both multi-functional double-headed fruit knives employ a "double-headed" design, integrating only two types of blades (such as a blade and a peeler), with the two blades exposed or hidden via a slider or button operation. This type of structure has significant limitations:

[0004] (1) Due to the “dual-head” layout, only two tool functions can be integrated. If more cutting functions are needed (such as adding different shaped blades or scrapers), the existing structure is difficult to achieve and cannot meet the diverse cutting needs. (2) Tool switching depends on the slider or button to control the two tool heads separately. The operation logic is relatively complicated and it is impossible to achieve fast and intuitive switching of multiple tools. (3) The “dual-head” axial arrangement structure makes it difficult to optimize the tool layout within the limited shell space, resulting in a mismatch between the overall volume and functional density and low space utilization. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a combined cutting tool that integrates more cutting tool functions, is easy to switch between and has a compact structure, so as to meet the needs of users.

[0006] To achieve the above objectives, this utility model provides a combined cutting tool, including...

[0007] The housing includes a main housing and a secondary housing coaxially connected, the main housing including a release area disposed along its axial direction, and the secondary housing having a plurality of blade outlets;

[0008] Several sets of cutters, each set of cutters including a cutter holder and a cutting blade, the cutter holder including a force-receiving part;

[0009] The tool holder is rotatably disposed within the main housing. The tool holder includes several tool areas, each of which houses one of the tool groups. The sub-housing is connected to the tool holder. The blade outlet is configured to correspond one-to-one with the tool groups to ensure that the blade extension / retraction path is unique, avoid mutual interference between blades from different tool groups, and improve the structural compactness.

[0010] A first drive assembly is adapted to drive the tool holder to rotate, thereby selecting one of the tool groups to align with the release area and become the target tool group, while the other tool groups remain non-target tool groups. The sub-housing rotates synchronously with the tool holder.

[0011] The second drive component includes

[0012] The pusher can reciprocate radially along the main housing within the release area, thereby selectively abutting or disengaging with the force-bearing part of the target blade assembly, precisely engaging with the force-bearing part of the target blade assembly, and avoiding contact with non-target blade assemblies to prevent accidental activation.

[0013] The drive button can reciprocate along the axial direction of the main housing within the release area. The drive button can drive the blade of the target blade assembly to extend or retract to the corresponding cutting edge through the push part.

[0014] Preferably, the main housing and the secondary housing enclose a storage space suitable for accommodating the entire knife assembly.

[0015] Preferably, the second drive assembly includes a drive ring disposed inside the main housing, the drive button is disposed outside the main housing, and the push portion is adapted to connect the drive ring and the drive button.

[0016] Preferably, the line connecting the pushing part and the supporting part passes through the center of the drive ring. When the pushing part abuts against the force-bearing part of the target tool group, the supporting part is adapted to abut against the force-bearing part of one of the non-target tool groups. When the pushing part abuts against the target tool group, the supporting part simultaneously abuts against the non-target tool group, forming symmetrical force, balancing the radial force on the tool holder, preventing the tool holder from shifting due to unilateral force, and ensuring the overall structural stability; or, the pushing part and the supporting part are arranged opposite to each other, and the pushing part is adapted to drive the supporting part to abut against the force-bearing part of the target tool group.

[0017] Preferably, the force-receiving part serves as the application point of the second driving component, enabling precise transmission of external driving force to the blade assembly, achieving controllable extension and retraction of the blade, and ensuring efficient power transmission. The force-receiving part is a groove formed on the outer surface of the blade holder. It includes an ejection stop and a retraction stop perpendicular to the axial direction of the main housing. The pushing part extends into the force-receiving part and abuts against the ejection stop to drive the blade of the target blade assembly out of the exit opening. The pushing part extends into the force-receiving part and abuts against the retraction stop to drive the blade of the target blade assembly back into the exit opening.

[0018] Preferably, one of the pushing part and the release area includes a positioning protrusion, and the other of the pushing part and the release area includes a positioning groove. The positioning groove / positioning protrusion moves synchronously with the pushing part, thereby selectively engaging with one of the positioning protrusion / positioning grooves, so that the target blade assembly remains in an extended or retracted state, resisting external force interference (such as slight collisions), preventing the blade from accidentally retracting during use or accidentally extending during storage, and improving safety during use.

[0019] Preferably, the blade assembly includes:

[0020] The first tool assembly includes a first tool holder and a first blade, both of which are straight plates.

[0021] The second tool assembly includes a second tool holder and a second blade, both of which are arc-shaped.

[0022] The outer peripheral surfaces of the first tool holder and / or the second tool holder are located on the same distribution circle, and the center of the distribution circle coincides with the rotation center axis. This ensures that the outer peripheral trajectories of all tool groups are consistent when the tool holder rotates, avoiding rotational imbalance (such as shaking and noise) caused by eccentricity, improving rotational smoothness, and ensuring that the outer periphery of each tool group does not interfere with the inner wall of the housing, thus reducing structural redundancy.

[0023] In a plane perpendicular to the axis of rotation, the first tool holder is arranged along one radial direction of the distribution circumference, and the second tool holder is arranged coaxially with the distribution circumference.

[0024] Preferably, the blade area includes a first blade area and a second blade area. The first blade area includes a first guide groove. The first blade holder can reciprocate within the first guide groove along the extension direction of the rotation center axis. The first guide groove and the first blade holder are adapted to form a circumferential limit to ensure that the straight blade assembly does not rotate circumferentially when it extends or retracts, and the blade direction remains stable (e.g., the straight blade maintains a straight direction), thereby improving cutting accuracy.

[0025] Preferably, one of the second blade area and the second blade holder is provided with a second guide groove, and the other of the second blade area and the second blade holder is provided with a second guide rail. The second guide groove and the second guide rail slide in cooperation along the extension direction of the rotation center axis, and the second guide groove and the second guide rail are adapted to form a circumferential limit. Similarly, the circumferential limit and axial sliding of the arc-shaped blade assembly are realized to ensure that the direction of the arc blade remains unchanged when it extends and retracts (such as the arc blade maintaining the curvature direction), and to avoid operational errors caused by blade deviation during cutting.

[0026] Preferably, the tool set includes one first tool set and three second tool sets, wherein the curvature of each second tool holder is [missing information]. The second set of blades is evenly distributed around the circumference and forms a circular arc, making the structure compact. Part of the first set of blades is adapted to extend into the circular arc, further reducing the overall volume and improving portability. The first blade is a fruit knife, and the three sets of second blades are scrapers of different shapes. A single tool can achieve multiple uses (such as "peeling → pitting → slicing" in fruit processing), eliminating the need to carry multiple knives.

[0027] Preferably, the first and second tool holders each have a locking block, and the inner peripheral wall of the housing has a stop step arranged circumferentially thereon and a release groove arranged axially thereon. The stop step is adapted to abut against the locking block to restrict the extension of the tool assembly, and the release groove is adapted to allow the locking block to reciprocate axially, thereby allowing the tool assembly to extend and retract. That is, the stop step mechanically locks non-target tool assemblies to prevent them from extending accidentally and to eliminate the risk of accidental contact, while the release groove only allows the locking block of the target tool assembly to move, realizing automated control of "locking when not in operation and unlocking when in operation" without additional operation and improving ease of use.

[0028] The locking block of the non-target tool group is blocked by the stop step and cannot move axially, ensuring that the blades of the non-target tool group are always retracted, avoiding accidental extension and scratches, and improving safety.

[0029] Preferably, the first drive assembly includes a drive shaft, a rotary operating component and a torque transmission component connected to both ends of the drive shaft, the rotary operating component being adapted to transmit external rotational torque to the drive shaft, and the torque transmission component being adapted to synchronously transmit the rotational torque to the tool holder.

[0030] Preferably, the rotating operating component includes a rotating peripheral wall with a plurality of positioning grooves; the housing also includes a locking positioning seat, which is installed at the end of the main housing away from the sub-housing, the drive shaft passes through the locking positioning seat and is connected to the rotating operating component, the locking positioning seat can rotate around the drive shaft, and a retractable positioning post is provided inside the locking positioning seat.

[0031] When the tool holder rotates to one of the tool groups to become the target tool group, the positioning pin engages with one of the positioning slots to generate tactile feedback, indicating that a single switching action has been completed. A single switching action refers to the target tool group switching from one of the tool groups to another adjacent tool group. Each positioning slot precisely corresponds to the switching position of a tool group, achieving "one-to-one" positioning in conjunction with the positioning pin.

[0032] Preferably, the locking positioning seat is provided with a telescopic groove suitable for receiving the positioning post, the telescopic groove is suitable for limiting the positioning post to always face the rotating peripheral wall, and the head of the positioning post is a spherical or conical structure.

[0033] As a preferred embodiment, the positioning pin always adheres to the rotating circumferential wall under the elastic force of the elastic element or its own elasticity, and produces a "click" tactile feedback when it is inserted into the positioning groove. Users can quickly confirm that the switch is in place through touch, without the need for visual assistance, thus improving the convenience of blind operation.

[0034] Preferably, the locking positioning seat and the rotating operating member enclose a cavity, the cavity contains a hanging rope, the rotating operating member includes a rope guide hole adapted to communicate with the cavity, the hanging rope includes a free end and an anti-detachment end, the free end can be led out through the rope guide hole, and the anti-detachment end is adapted to prevent the hanging rope from completely detaching.

[0035] Preferably, the torque transmission component is a turntable, and the drive shaft is integrally formed with the turntable. A square key is formed at the other end of the drive shaft, and the rotary operating component engages with the square key via a plug-in mechanism. The square key structure enables torque transmission from a non-circular cross-section, allowing it to withstand greater torque compared to traditional cylindrical keys. The secondary housing is integrally formed at one end of the tool holder, ensuring the positional accuracy of the cutting edge and the tool assembly. During installation, the other end of the tool holder is suitable for insertion into the main housing. This integrated design (turntable-drive shaft, secondary housing-tool holder) reduces the number of parts, lowers assembly errors, and improves overall rigidity.

[0036] Preferably, the outer surface of the drive ring is provided with a plurality of protrusions, which are arranged along the axial direction of the main housing. At least two of the protrusions are engaged in the release groove and can reciprocate axially within the release groove.

[0037] Preferably, the turntable includes two fan-shaped lugs, which together with the first tool holder form a circumferential limit, so that the turntable directly drives the first tool group to rotate synchronously when it rotates.

[0038] Preferably, the cutting edge of the first blade faces the radially inner or radially outer side of the distribution circumference.

[0039] The beneficial effects of this utility model are:

[0040] By integrating multiple tool sets into the tool holder, the tool sets can be quickly switched by rotating the tool holder, and a target tool set that can be freely accessed through the release area can be obtained, realizing the switch from storage state to working state, while other non-target tool sets remain in storage state to avoid accidental activation and improve safety. Attached Figure Description

[0041] Figure 1 is a schematic diagram of the structure of a combined cutting tool in Embodiment 1.

[0042] Figure 2 is an exploded view of a combined cutting tool provided in Example 1.

[0043] Figure 3 is a cross-sectional schematic diagram of a combined cutting tool provided in Embodiment 1.

[0044] Figure 4 is an assembly diagram of the tool holder, tool assembly and part of the first drive assembly provided in Embodiment 1.

[0045] Figure 5 is a schematic diagram of the tool holder provided in Example 1.

[0046] Figure 6 is a top view of the tool holder provided in Embodiment 1.

[0047] Figure 7 is a schematic diagram of the knife assembly provided in Example 1.

[0048] Figure 8 is a top view of the tool holder provided in Embodiment 1.

[0049] Figure 9 is a schematic diagram of the structure of the rotating operating component provided in Embodiment 1.

[0050] Figure 10 is a schematic diagram of the main housing provided in Embodiment 1.

[0051] Figure 11 is a schematic diagram of the drive ring provided in Example 1.

[0052] Figure 12 is an exploded view of a combined cutting tool provided in Example 2.

[0053] Figure 13 is a cross-sectional schematic diagram of a combined cutting tool provided in Embodiment 2.

[0054] Figure 14 is a schematic diagram of the drive ring provided in Example 2.

[0055] Figure 15 is a schematic diagram of the main housing provided in Embodiment 2.

[0056] In the diagram: 1. Housing; 11. Main housing; 111. Release area; 1111. Positioning protrusion; 112. Stop step; 113. Release groove; 12. Sub-housing; 121. First blade outlet; 122. Second blade outlet; 13. Locking positioning seat; 131. Telescopic groove; 132. Positioning post; 133. Positioning ring; 14. Cavity; 15. Hanging rope; 151. Free end; 152. Anti-detachment end; 153. Rope threading seat; 2. Blade assembly; 21. First blade assembly; 211. First blade holder; 2111. First step; 212. First blade; 22. Second blade assembly; 221. Second blade holder; 2211. Second step; 2212. Second guide. 222. Groove; 23. Second blade; 24. Distribution circumference; 25. Force-bearing part; 26. Push-out stop; 27. Retract stop; 28. Locking block; 29. ​​Tool holder; 20. First blade area; 21. First guide groove; 22. Second blade area; 23. Second guide rail; 24. First drive assembly; 25. Drive shaft; 26. Rotary operating component; 27. Rotary peripheral wall; 28. Positioning groove; 29. ​​Rope hole; 20. Torque transmission component; 20. Turntable; 21. Fan-shaped lug; 22. Second drive assembly; 23. Drive ring; 24. Support part; 25. Protrusion; 26. Pushing part; 27. Positioning groove; 28. Drive button. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0058] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0059] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] Example 1

[0061] like Figure 1-11As shown, a combined cutting tool includes a housing 1, several tool sets 2, a tool holder 3, a first drive assembly 4, and a second drive assembly 5. The housing 1 includes a main housing 11, sub-housings 12 coaxially disposed at both axial ends of the main housing 11, and a locking positioning seat 13. The main housing 11 includes a release area 111 disposed along its axial direction, and the sub-housings 12 have several tool exits. The tool sets 2 include a first tool set 21 and three second tool sets 22. The first tool set 21 includes a first tool holder 211 and a first blade 212, both of which are straight plates. The second tool sets 22 include a second tool holder 221 and a second blade 222, both of which are arc-shaped. The sub-housings 12 are integrally formed at one end of the tool holder 3 to ensure the positional accuracy of the tool exits and the tool sets 2. During installation, the other end of the tool holder 3 is adapted to penetrate the main housing 11, and the tool holder 3 is rotatably disposed within the main housing 11. The main housing 11 and the sub-housings 12 enclose a storage space suitable for completely accommodating the tool sets 2. The tool holder 3 includes several tool areas, including a first tool area 31 and a second tool area 32. The first tool area 31 is adapted to accommodate a first tool group 21, and the second tool area 32 is adapted to accommodate a second tool group 22. The tool outlets include a first tool outlet 121 corresponding to the first tool group 21 and a second tool outlet 122 corresponding to the second tool group 22.

[0062] In this embodiment, the first drive assembly 4 includes a drive shaft 41, a rotation operating component 42, and a torque transmission component 43. The torque transmission component 43 is a turntable 431, and the drive shaft 41 and the turntable 431 are integrally formed. A square key is formed at the other end of the drive shaft 41, and the rotation operating component 42 is engaged with the square key. The rotation operating component 42 is adapted to transmit external rotational torque to the drive shaft 41, and the torque transmission component 43 is adapted to synchronously transmit the rotational torque to the tool holder 3. The turntable 431 includes two fan-shaped lugs 432, which, together with the first tool holder 211, form a circumferential limit, so that when the turntable 431 rotates, it directly drives the first tool assembly 21 to rotate synchronously. The turntable 431 is engaged with the other end of the tool holder 3 along its extension direction. The first tool holder 211 includes a first step 2111, and the second tool holder 221 includes a second step 2211. The first step 2111 and the second step 2211 are adapted to jointly support the turntable 431. The first drive assembly 4 is adapted to drive the tool holder 3 to rotate around the rotation center axis, thereby selecting one of its tool groups 2 to align with the release area 111 and become the target tool group, while the other tool groups 2 remain non-target tool groups, and the sub-housing 12 rotates synchronously with the tool holder 3.

[0063] In this embodiment, the outer peripheral surfaces of the first tool holder 211 and the second tool holder 221 are located on the same distribution circumference 23, and the center of the distribution circumference 23 coincides with the rotation center axis. The first tool holder 211 and the second tool holder 221 include a force-receiving part 24, which is a groove formed on the outer surface of the first tool holder 211 / second tool holder 221. The force-receiving part 24 includes a push-out stop surface 241 and a retraction stop surface 242 arranged perpendicular to the axial direction of the main housing 11. The second drive assembly 5 includes a drive ring 51, a push-off part 52, and a drive button 53. The drive ring 51 is disposed inside the main housing 11, and the drive button 53 is disposed outside the main housing 11. The push-off part 52 is adapted to connect the drive ring 51 and the drive button 53. The push-off part 52 can reciprocate radially along the main housing 11 within the release area 111, thereby selectively abutting or disengaging from the force-receiving part 24 of the target tool group, accurately engaging the force-receiving part 24 of the target tool group, and avoiding contact with non-target tool groups to prevent mis-drive. The drive button 53 can reciprocate along the axial direction of the main housing 11 within the release area 111. Specifically: when the pushing part 52 extends into the force-receiving part 24 and abuts against the push-out stop surface 241, the drive button 53 can drive the blade of the target blade assembly to extend out of the cutting edge via the pushing part 52; when the pushing part 52 extends into the force-receiving part 24 and abuts against the retraction stop surface 242, the drive button 53 can drive the blade of the target blade assembly to retract back into the cutting edge via the pushing part 52.

[0064] In this embodiment, a support portion 511 protrudes from the inner surface of the drive ring 51. The line connecting the pushing portion 52 and the support portion 511 passes through the center of the drive ring 51. When the pushing portion 52 presses against the force-bearing portion 24 of the target tool group, the support portion 511 is adapted to press against the force-bearing portion 24 of one of the non-target tool groups. When the pushing portion 52 presses against the target tool group, the support portion 511 simultaneously presses against the non-target tool group, forming symmetrical force, balancing the radial force on the tool holder 3, preventing the tool holder 3 from shifting due to unilateral force, and ensuring the overall structural stability.

[0065] In this embodiment, the release area 111 includes two sets of positioning protrusions 1111, and the pushing part 52 includes a positioning groove 521. The positioning groove 521 moves synchronously with the pushing part 52, thereby selectively engaging with one of the positioning protrusions 1111, so that the target blade assembly remains in an extended or retracted state, resisting external interference (such as slight collisions), preventing the blade from accidentally retracting during use or accidentally extending during storage, and improving the safety of use.

[0066] In this embodiment, in a plane perpendicular to the rotation center axis, the first tool holder 211 is arranged radially along one of the distribution circumferences 23, and the second tool holder 221 is coaxially arranged with the distribution circumference 23. The first tool area 31 includes a first guide groove 311, within which the first tool holder 211 can reciprocate along the extension direction of the rotation center axis, and the first guide groove 311 and the first tool holder 211 are adapted to form a circumferential limit. The second tool area 32 is provided with a second guide rail 321, and the second tool holder 221 is provided with a second guide groove 2212, which slides along the extension direction of the rotation center axis, and the second guide groove 2212 and the second guide rail 321 are adapted to form a circumferential limit. The arc of each second tool holder 221 is π / 4. The second tool groups 22 are evenly distributed circumferentially and enclosed to form a distribution arc, making the structure compact. Some of the first tool groups 21 are adapted to extend into the distribution arc, further reducing the overall volume and improving portability. The first blade 212 is a fruit knife, with its cutting edge facing the radially outer side of the distribution circumference 23. The three sets of second blades 222 are scrapers of different shapes, achieving multiple uses with a single tool.

[0067] In this embodiment, the first tool holder 211 and the second tool holder 221 each have a locking block 25. The inner peripheral wall of the housing 1 is formed with a stop step 112 arranged circumferentially and a release groove 113 arranged axially. The stop step 112 is adapted to abut against the locking block 25 to restrict the extension of the tool assembly 2, and the release groove 113 is adapted to allow the locking block 25 to reciprocate axially, thereby allowing the tool assembly 2 to extend and retract. That is, the stop step 112 forms a mechanical lock on the non-target tool assembly to prevent it from extending accidentally and solve the risk of accidental contact. The release groove 113 only allows the locking block 25 of the target tool assembly to move, realizing the automated control of "locking when not in operation and unlocking when in operation" without additional operation, improving the convenience of use. The locking block 25 of the non-target tool assembly is blocked by the stop step 112 and cannot move axially, ensuring that the blade of the non-target tool assembly is always retracted, avoiding accidental extension and scratches, and improving safety.

[0068] In this embodiment, the rotating operating member 42 includes a rotating peripheral wall 421, which has a plurality of positioning grooves 4211. The drive shaft 41 passes through the locking positioning seat 13 and is connected to the rotating operating member 42. The locking positioning seat 13 can rotate around the drive shaft 41. The locking positioning seat 13 is provided with a telescopic groove 131 suitable for accommodating the positioning post 132. The telescopic groove 131 is suitable for limiting the positioning post 132 to always face the rotating peripheral wall 421. The head of the positioning post 132 has a spherical structure. Under its own elasticity, the positioning post 132 always fits against the rotating peripheral wall 421. When it is engaged in the positioning groove 4211, it produces a "click" tactile feedback. The user can quickly confirm the switch is in place through touch, without visual assistance, thus improving the convenience of blind operation. When the tool holder 3 rotates to the position where one of its tool groups 2 becomes the target tool group, the positioning pin 132 engages with one of its positioning slots 4211, generating tactile feedback to indicate that the single switching action is complete. The single switching action refers to the target tool group switching from one of its tool groups 2 to another adjacent tool group 2. Each positioning slot 4211 precisely corresponds to the switching position of one tool group 2, achieving "one-to-one" positioning in conjunction with the positioning pin 132.

[0069] Furthermore, the outer surface of the drive ring 51 is provided with a plurality of protrusions 512, which are arranged along the axial direction of the main housing 11. At least two of the protrusions 512 are engaged in the release groove 113 and can reciprocate axially within the release groove 113.

[0070] In this embodiment, the locking positioning seat 13 and the rotating operating member 42 enclose a cavity 14, which houses the hanging rope 15. The rotating operating member 42 includes a rope hole 422 adapted to communicate with the cavity 14. The hanging rope 15 includes a free end 151 and an anti-detachment end 152. The free end 151 can be led out through the rope hole 422, and the anti-detachment end 152 is adapted to prevent the hanging rope 15 from completely detaching.

[0071] Example 2

[0072] like Figure 12-15 As shown, a combined cutting tool, compared to Embodiment 1, differs in that a support portion 511 protrudes from the inner surface of the drive ring 51, and a pushing portion 52 is disposed opposite to the support portion 511. The pushing portion 52 is adapted to drive the support portion 511 to abut against the force-bearing portion 24 of the target cutting tool assembly. Correspondingly, a release area 111 is disposed at the bottom of the release groove 113.

[0073] In this embodiment, the rotating operating member 42 includes a rotating peripheral wall 421, which has a plurality of positioning grooves 4211. The drive shaft 41 passes through the locking positioning seat 13 and is connected to the rotating operating member 42. The locking positioning seat 13 can rotate around the drive shaft 41. A positioning ring 133 is coaxially arranged inside the locking positioning seat 13. The positioning ring 133 includes at least one positioning post 132. The positioning post 132 is arranged radially along the positioning ring 133 and always faces the rotating peripheral wall 421. The head of the positioning post 132 has a spherical structure. Under the elastic action of itself and the positioning ring 133, the positioning post 132 always fits against the rotating peripheral wall 421 and generates a "click" tactile feedback when it is engaged in the positioning groove 4211. When the tool holder 3 rotates to the point where one of its tool groups 2 becomes the target tool group, the positioning post 132 engages in one of its positioning grooves 4211 to generate tactile feedback, indicating that the single switching action is in place.

[0074] In this embodiment, the top of the rotating operating member 42 is provided with a rope-threading seat 153 through which the hanging rope 15 can pass. The rope-threading seat 153 is provided with a rope-leading hole 422. The drive shaft 41 has a hollow structure. The rope-leading hole 422 is aligned with the drive shaft 41 so that at least part of the hanging rope 15 can be accommodated inside the drive shaft 41. The hanging rope 15 includes a free end 151 and an anti-detachment end 152. The free end 151 can be led out through the rope-leading hole 422, and the anti-detachment end 152 is adapted to prevent the hanging rope 15 from completely detaching.

[0075] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A combination cutting tool, characterized in that, include The housing includes a main housing and a secondary housing coaxially connected, the main housing including a release area disposed along its axial direction, and the secondary housing having a plurality of blade outlets; Several sets of cutters, each set of cutters including a cutter holder and a cutting blade, the cutter holder including a force-receiving part; The tool holder is rotatably disposed within the main housing. The tool holder includes several tool areas, each tool area housing one of the tool groups. The sub-housing is connected to the tool holder, and the tool outlet is provided in a one-to-one correspondence with the tool groups. A first drive assembly is adapted to drive the tool holder to rotate about a rotation center axis, thereby selecting one of the tool groups to align with the release area and become the target tool group, while the other tool groups remain non-target tool groups. The sub-housing rotates synchronously with the tool holder. The second drive component includes The pushing part can reciprocate radially along the main housing within the release area, thereby selectively abutting against or disengaging from the force-bearing part of the target blade assembly; The drive button can reciprocate along the axial direction of the main housing within the release area. The drive button can drive the blade of the target blade assembly to extend or retract to the corresponding cutting edge through the push part.

2. A combined cutting tool according to claim 1, characterized in that, The second drive assembly includes a drive ring disposed inside the main housing, a drive button disposed outside the main housing, and a pusher portion adapted to connect the drive ring and the drive button. The inner surface of the drive ring is provided with a support portion, wherein: the line connecting the pushing portion and the support portion passes through the center of the drive ring; when the pushing portion abuts against the force-bearing portion of the target tool group, the support portion is adapted to abut against the force-bearing portion of one of the non-target tool groups; or, the pushing portion and the support portion are arranged opposite to each other, and the pushing portion is adapted to drive the support portion to abut against the force-bearing portion of the target tool group.

3. A combined cutting tool according to claim 2, characterized in that, The force-receiving part is a groove formed on the outer surface of the tool holder. The force-receiving part includes an ejection stop and a retraction stop arranged perpendicular to the axial direction of the main housing. The pushing part or the supporting part extends into the force-receiving part and abuts against the ejection stop to drive the blade of the target tool set to extend out of the cutting opening. The pushing part or the supporting part extends into the force-receiving part and abuts against the retraction stop to drive the blade of the target tool set to retract back into the cutting opening.

4. A combined cutting tool according to claim 2 or 3, characterized in that, One of the pushing part and the release area includes a positioning protrusion, and the other of the pushing part and the release area includes a positioning groove. The positioning groove / the positioning protrusion moves synchronously with the pushing part, thereby selectively engaging with one of the positioning protrusion / the positioning groove, so that the target blade assembly remains in an extended or retracted state.

5. A combined cutting tool according to claim 1, characterized in that, The blade assembly includes The first tool assembly includes a first tool holder and a first blade, both of which are straight plates. The second tool assembly includes a second tool holder and a second blade, both of which are arc-shaped. The outer peripheral surfaces of the first tool holder and / or the second tool holder are located on the same distribution circle, and the center of the distribution circle coincides with the rotation center axis; In a plane perpendicular to the axis of rotation, the first tool holder is arranged along one radial direction of the distribution circumference, and the second tool holder is arranged coaxially with the distribution circumference.

6. A combined cutting tool according to claim 5, characterized in that, The cutting area includes a first cutting area and a second cutting area. The first cutting area includes a first guide groove. The first cutting holder can reciprocate and slide within the first guide groove along the extension direction of the rotation center axis. The first guide groove and the first cutting holder are adapted to form a circumferential limit. One of the second cutting area and the second cutting tool holder is provided with a second guide groove, and the other of the second cutting area and the second cutting tool holder is provided with a second guide rail. The second guide groove and the second guide rail are slidably engaged along the extension direction of the rotation center axis, and the second guide groove and the second guide rail are adapted to form a circumferential limit.

7. A combined cutting tool according to claim 6, characterized in that, The first tool holder and the second tool holder each have a locking block. The inner peripheral wall of the housing is formed with a stop step arranged circumferentially thereon and a release groove arranged axially thereon. The stop step is adapted to abut against the locking block to restrict the extension of the tool assembly. The release groove is adapted to allow the locking block to reciprocate axially, thereby allowing the tool assembly to extend and retract.

8. A combined cutting tool according to claim 7, characterized in that, The first drive assembly includes a drive shaft, a rotary operating component and a torque transmission component that are drively connected to both ends of the drive shaft. The rotary operating component is adapted to transmit external rotational torque to the drive shaft, and the torque transmission component is adapted to synchronously transmit the rotational torque to the tool holder.

9. A combined cutting tool according to claim 8, characterized in that, The rotating operating component includes a rotating peripheral wall, and the rotating peripheral wall is formed with a plurality of positioning grooves; The housing also includes a locking positioning seat, which is installed at the end of the main housing away from the sub-housing. The drive shaft passes through the locking positioning seat and is connected to the rotating operating member. The locking positioning seat can rotate around the drive shaft. A retractable positioning post is provided inside the locking positioning seat. When the tool holder rotates to one of the tool groups to become the target tool group, the positioning post engages in one of the positioning slots to generate tactile feedback, indicating that a single switching action has been completed. A single switching action refers to the target tool group being switched from one of the tool groups to another adjacent tool group.

10. A combined cutting tool according to claim 9, characterized in that, The locking positioning seat and the rotating operating member enclose a cavity, the cavity housing a hanging rope, the rotating operating member including a rope guide hole adapted to communicate with the cavity, the hanging rope including a free end and an anti-detachment end, the free end being able to be led out through the rope guide hole, and the anti-detachment end being adapted to prevent the hanging rope from completely detaching.

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