Replaceable blade cutter

Abstract

The utility model discloses a tool of replaceable blade belongs to hand tool technology, and the existing tool replaces the blade inconveniently, and the structure is complex, the tool of the utility model includes first handle body and second handle body, and the first handle body has the slit shape installation storehouse in the front part and the storage storehouse in the back, and the installation storehouse and the storage storehouse are all open in the back of first handle body, and the installation storehouse still has the slit passage to the front, and the second handle body rear end is connected in the rear end of first handle body through the pivot rotation, and the second handle body can rotate to reach the folding position and the unfolded position with first handle body, and when the second handle body is located in the folding position, the first handle body constitutes the handle and covers the installation storehouse and the storage storehouse, and the working blade is restricted in the installation storehouse, and when the second handle body is located in the unfolded position, the installation storehouse and the storage storehouse are opened, and the restriction to the working blade is cancelled, and the spare blade can be taken and the working blade is replaced. The tool is convenient to operate, and the blade is replaced quickly. Fewer parts, simple structure, easy to assemble, low manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of hand-operated knife technology, specifically relating to a knife with interchangeable blades. Background Technology

[0002] Traditional utility knives or stationery knives consist of a handle, a blade, and a pusher mechanism. The blade is movably mounted in the handle, while the pusher mechanism is movably mounted on the handle and assembles with the blade to move the blade outward or inward. This design makes it difficult to easily remove the blade from the handle, causing inconvenience for users when replacing it. Furthermore, it has many parts and a complex structure. Utility Model Content

[0003] This utility model addresses the shortcomings of existing cutting tools, such as inconvenient blade replacement and complex structure, by providing a cutting tool with fewer parts and easier blade replacement.

[0004] To achieve the above objectives, the replaceable blade cutting tool of this utility model includes: The first handle has a slit-shaped mounting compartment at the front and a storage compartment at the rear. Both the mounting compartment and the storage compartment are open on the back of the first handle. The mounting compartment also has a forward-facing slit channel for inserting or removing working blades from the mounting compartment through the slit channel. The storage compartment is suitable for storing spare blades through its open end. The second handle body has its rear end pivotally connected to the rear end of the first handle body. The second handle body can rotate relative to the first handle body to reach the closed position and the unfolded position. When the second handle body is in the closed position, it forms a handle with the first handle body and covers the mounting chamber and storage chamber, constraining the working blade in the mounting chamber. When the second handle body is in the unfolded position, it opens the mounting chamber and storage chamber and releases the constraint on the working blade to allow the working blade to be taken out and loaded through the slit channel.

[0005] This cutting tool allows for easy access to spare blades and replacement of the working blade when the second shank is rotated to the extended position, and the working blade is secured when the second shank is rotated to the closed position. Operation is convenient and blade replacement is quick. Furthermore, the product has few parts, a simple structure, is easy to assemble, and has low manufacturing costs.

[0006] As a preferred technical means: the working blade has a groove on its back, and the front of the second shank has a flange facing the groove. When the second shank is in the closed position, the flange is engaged in the groove to constrain the working blade within the mounting chamber. When the second shank is in the extended position, the flange disengages from the groove, releasing the constraint on the working blade. The working blade is reliably constrained and fixed to the tool holder composed of the first and second shanks through the cooperation of the flange and the groove.

[0007] As a preferred technical approach: the working blade has a beveled edge, and the front part of the second shank has a holding part. When the second shank is in the closed position, the holding part presses down on the beveled edge. This can stabilize the working blade and prevent it from shaking due to the reaction force of cutting during cutting.

[0008] As a preferred technical means, the rear end of the mounting chamber has a positioning part. This part is used to position the working blade when it is loaded into the mounting chamber through the slit channel, especially when the working blade is fixed to the tool holder by the cooperation of the flange and the slot. This positioning of the working blade ensures that the flange can be slotted.

[0009] As a preferred technical means, when the second handle is in the closed position, it is constrained to the first handle by the first constraint structure. This is to prevent the second handle from accidentally unfolding from the first handle. In different embodiments, the first constraint structure is a magnetic structure or a snap-fit ​​structure.

[0010] As a preferred technical means, the second handle is constrained and limited by the second constraint structure when it is in the unfolded position. This is used to position the second handle in this position, preventing accidental closure and facilitating the retrieval of spare blades.

[0011] As a preferred technical means: In order to simplify the structure, the rear end of the second handle is provided with an elastic part, the elastic part has a first damping part, and the second constraint structure includes a blocking part and a second damping part provided at the rear end of the first handle. When the second handle is in the unfolded position, the elastic part abuts against the blocking part and the first damping part and the second damping part form a damping engagement.

[0012] As a preferred technical means: the second handle can rotate relative to the first handle to reach an intermediate position between the closed position and the unfolded position. When the second handle is in the intermediate position, it is positioned by the damping structure, releases the constraint on the working blade, and covers the storage compartment.

[0013] As a preferred technical means: the rear end of the second handle is provided with an elastic part, and the damping structure includes a groove and a protrusion respectively provided on the rear end of the first handle and the elastic part. When the second handle is in the middle position, the protrusion is located in the groove to form a damping fit.

[0014] As a preferred technical means: the first handle has a first sidewall and a second sidewall, and the mounting compartment and storage compartment are defined between the first sidewall and the second sidewall. The second handle has a first side and a second side. When the second handle is in the closed position, the first side is located outside the first sidewall and the second side is located outside the second sidewall. This allows the second handle to be fastened to the opening of the first handle like a cap, ensuring a reliable connection between the first and second handles and reliably securing the working blade and spare blade to the handle.

[0015] As a preferred technical approach, the side wall of the storage compartment has a notch to expose the spare blade for easy access.

[0016] As a preferred technical approach, both the first and second shanks are integrally formed. This simplifies the tool structure, reduces the number of tool parts, simplifies assembly, and saves manufacturing costs.

[0017] As a preferred technical approach, the inner walls on both sides of the installation chamber are provided with support ribs, each with a forward-facing guide surface. The support ribs prevent the working blade from wobbling, and the guide surfaces guide the working blade into the installation chamber.

[0018] This invention allows for easy access to a spare blade and replacement of the working blade when the second handle is rotated to the unfolded position, and the working blade is secured when the second handle is rotated to the closed position. Operation is convenient, requires no tools, and blade replacement is quick. Furthermore, the product has few parts, a simple structure, is easy to assemble, and has low manufacturing costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a replaceable blade cutting tool according to one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the cutting tool from another perspective; Figure 3 This is a schematic diagram of the cutting tool of this utility model from one perspective of orthographic projection. Figure 4 for Figure 3 Sectional view along axis AA; Figure 5 for Figure 3 BB-direction sectional view; Figure 6 for Figure 4 The diagram shows the structure after the working blade and spare blade have been removed. Figure 7 for Figure 5 The diagram shows the structure after the working blade and spare blade have been removed. Figure 8 for Figure 4 A schematic diagram of the second handle of the structure shown in the diagram rotated to the middle position; Figure 9 for Figure 4 A schematic diagram of the second handle of the structure shown in the diagram rotated to the unfolded position; Figure 10 for Figure 1 The diagram shows an exploded view of the tool's structure. Figure 11 for Figure 10 A schematic diagram of the structure shown from another perspective; Figure 12 for Figure 8 Enlarged view of part A; Figure 13 for Figure 9 Enlarged view of part B; Figure 14 This is a side orthographic projection of a tool with replaceable blades according to another embodiment of the present invention. Figure 15 for Figure 14 Enlarged view of the CC-direction cross-section; Figure 16 for Figure 14 A schematic diagram showing the second shank of the cutting tool rotated at an angle relative to the first shank; Explanation of the labels in the diagram: 100 First handle body, 101 Installation chamber, 102 Storage chamber, 103 Slit channel, 104 Positioning part, 105 Blocking part, 106 Second damping part, 107 Groove, 108 First side wall, 109 Second side wall, 110 Notch, 111 Support rib, 112 Guide surface, 113 Step, 114 First magnet, 115 Protrusion; 200 Second handle body, 201 Flange, 202 Pressing part, 203 Elastic part, 204 First damping part, 205 Protrusion, 206 First side, 207 Second side, 208 Second magnet, 209 Slot. 300 pivots; 410 Working insert, 420 Spare insert, 401 Slot, 402 Bevel. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0022] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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. Therefore, they should not be construed as limitations on this invention. "Upper" and "lower," "left" and "right," and "front" and "rear" are opposite directions.

[0023] In the description of this utility model, it should be understood that the technical features defined by terms such as "first" and "second" which have a sequential concept are only for the purpose of clearly describing the defined technical features and making the defined technical features clearly distinguishable from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this utility model.

[0024] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0025] Figure 1-11 A preferred embodiment of a replaceable-blade cutting tool is shown. The cutting tool includes a first shank 100, a second shank 200, a working blade 410, and a spare blade 420.

[0026] The first handle 100 has a slit-shaped mounting compartment 101 at the front and a storage compartment 102 at the rear. Both the mounting compartment 101 and the storage compartment 102 are open at the back of the first handle 100. Figure 10 In the first handle 100, the back is the upper edge of the first handle. The mounting compartment 101 also has a forward-facing slit channel 103 for loading or unloading the working blade 410 from the slit channel into or out of the mounting compartment. The storage compartment 102 is adapted to store spare blades 420 from its open end.

[0027] The rear end of the second handle 200 is rotatably connected to the rear end of the first handle 100 via a pivot 300, and the second handle 200 can rotate relative to the first handle 100 to reach... Figure 1-5 The closing position shown and Figure 9 The second handle 200 is in the closed position, forming a handle with the first handle 100 and covering the mounting chamber 101 and storage chamber 102, thus securing the working blade 410 to the mounting chamber 101. When the second handle 200 is in the unfolded position, the mounting chamber 101 and storage chamber 102 are opened, and the constraint on the working blade 101 is released, allowing the working blade 410 to be taken out and loaded through the slit channel 103, and the spare blade 420 to be taken out from the storage chamber 102.

[0028] The working blade 410 and the spare blade 420 are named separately only because of their different positions on the tool holder. Since the spare blade is used to replace the working blade, the spare blade has the same mounting structure as the working blade, and it is especially preferred that the working blade and the spare blade are the same.

[0029] This cutting tool allows for easy access to a spare blade and replacement of the working blade when the second shank is rotated to the extended position, and the working blade is secured when the second shank is rotated to the closed position. No tools are required, making operation convenient and blade replacement quick. Furthermore, the product has few parts, a simple structure, is easy to assemble, and has low manufacturing costs.

[0030] The above structure embodies the basic concept of the cutting tool of this utility model, enabling the realization of the technical solution of this utility model. To further improve the cutting tool, the following preferred technical means can be selected to obtain better embodiments based on the above structure.

[0031] like Figure 4-5 , Figure 8-11 As shown, the working blade 410 has a groove 401 on its back, and the second shank 200 has a flange 201 facing the groove at its front. The second shank 200 is located at... Figure 4-5 When the shown closed position is engaged, flange 201 is locked within slot 401, constraining the working blade 410 to the mounting chamber 101. The second shank 200 is located in... Figure 9 When the flange 201 is in the unfolded position shown, it disengages from the slot 401, releasing the constraint on the working blade 410. The working blade is reliably constrained and fixed to the tool holder composed of the first shank body 100 and the second shank body 200 through the cooperation between the flange 201 and the slot 401.

[0032] like Figure 4-5 , Figure 8-11 As shown, the working blade 410 has a bevel 402, and the front part of the second shank 200 has a pressing part 202. The second shank 200 is located at... Figure 4-5 When the blade is closed as shown, the holding part 202 presses down on the inclined side 402. This stabilizes the working blade and prevents it from shaking due to the reaction force of cutting.

[0033] like Figure 4-9 As shown, the rear end of the mounting chamber 101 has a positioning part 104. This part is used to position the working blade 410 when it is inserted into the mounting chamber 101 from the slit channel 103. In particular, when the working blade 410 is fixed to the tool holder by the cooperation of the flange 201 and the slot 401, this positioning of the working blade ensures that the flange 201 can be precisely engaged with the slot 401.

[0034] like Figure 4-7As shown, when the second handle 200 is in the closed position, it is constrained to the first handle by the first constraint structure. This is to prevent the second handle from accidentally unfolding from the first handle. In the illustrated structure, the first constraint structure is a magnetic attraction structure composed of a matching first magnet 114 and a second magnet 208. The first magnet 114 is fixed to the first handle 100, and the second magnet 208 is fixed to the second handle 200. When the second handle is in the closed position, the first magnet 114 and the second magnet 208 attract each other, constraining the second handle to the first handle together.

[0035] In other embodiments, the first constraint structure may also be a snap-fit ​​structure. For example... Figure 14-16 As shown, the snap-fit ​​structure includes a pair of protrusions 115 and a pair of grooves 209. The protrusions 115 are located on the outer front ends of the first sidewall 108 and the second sidewall 109 of the first handle 100, and the grooves 209 are located on the inner front ends of the first sidewall 206 and the second sidewall 207 of the second handle 200. The second handle 200 is located at... Figure 14-15 When the handle 200 is in the closed position, the protrusion 115 engages with the corresponding groove 209, binding the second handle to the first handle together. When the second handle 200 unfolds from the closed position, the elastic deformation of the protrusion 115 and / or the groove 209 allows the protrusion 115 to pass over the groove 209, traversing the intermediate position. Figure 16 The indicated position has reached the unfolded position.

[0036] like Figure 9 As shown, the second handle 200 is constrained and limited by the second constraint structure when in the unfolded position. This is used to position the second handle in this position, preventing accidental closure and facilitating the retrieval of spare blades. Specifically, as... Figure 13As shown, to simplify the structure, the rear end of the second handle 200 is provided with an elastic portion 203, which has a first damping portion 204. The second constraint structure includes a blocking portion 105 and a second damping portion 206 located at the rear end of the first handle 100. When the second handle 200 is in the unfolded position, the elastic portion 203 abuts against the blocking portion 105, and the elastic portion 203 is blocked by the blocking portion 105, preventing the second handle 200 from continuing to rotate in the unfolding direction. Furthermore, when the second handle 200 is in the unfolded position, the first damping portion 204 and the second damping portion 106 form a damping engagement to prevent the second handle 200 from rotating to the closed position. In the illustrated structure, both the first damping part 204 and the second damping part 106 are protrusions. When the second handle 200 is in the unfolded position, the second damping part 106 is located in the direction in which the first damping part 204 rotates towards the closing position and abuts against the first damping part 204. Due to the presence of the elastic part 203, when an external force is applied to the second handle causing it to rotate towards the closing position, the elastic part 203 undergoes elastic deformation, causing the first damping part 204 to pass over the second damping part 106 and overcome the damping engagement, thus rotating the second handle towards the closing position. Similarly, when the second handle is rotated in the unfolded direction, the elastic deformation of the elastic part causes the first damping part to pass over the second damping part and overcome the damping to reach the unfolded position.

[0037] like Figure 8 As shown, the second handle 200 can rotate relative to the first handle 100 to reach an intermediate position between the closed position and the unfolded position. When the second handle 200 is in the intermediate position, it is positioned by the damping structure, releasing the constraint on the working blade 410 and blocking the storage compartment 102 to prevent the spare blade from falling out of the storage compartment. Further, as Figure 12 As shown, the rear end of the second handle 200 is provided with an elastic portion 203. The damping structure includes a groove 107 and a protrusion 205 respectively disposed on the rear end of the first handle 100 and the elastic portion 203. When the second handle is in the middle position, the protrusion 205 is located in the groove 107 to form a damping fit. The damping fit formed by the protrusion 205 in the groove 107 is interchangeable with the damping fit formed by the two protrusions mentioned above.

[0038] like Figure 10-11As shown, the first handle 100 has a first sidewall 108 and a second sidewall 109. The mounting chamber 101 and the storage chamber 102 are defined between the first sidewall 108 and the second sidewall 109. The second handle 200 has a first side 206 and a second side 207. When the second handle 200 is in the closed position, the first side 206 is located outside the first sidewall 108, and the second side 207 is located outside the second sidewall 109. This allows the second handle 200 to fit over the opening of the first handle 100 like a hat, ensuring a reliable connection between the first and second handles and reliably securing the working blade and spare blade to the handle. To ensure a regular shape for the handle, the outer sides of the first and second walls have steps 113. When the second handle is in the closed position, the edges of the first side 206 and the second side 207 align with the corresponding steps 113.

[0039] like Figure 10-11 As shown, the side wall of the storage compartment 102 has a notch 110 to expose the spare blade for easy access.

[0040] like Figure 10-11 As shown, both the first shank body 100 and the second shank body 200 are integral structures. This simplifies the tool structure, reduces the number of tool parts, and the entire tool consists only of the first shank body 100, the second shank body 200, the pivot 300, the working insert 410, and the spare insert 420, simplifying assembly and saving manufacturing costs.

[0041] like Figure 6-7 , Figure 10 As shown, the inner walls on both sides of the mounting chamber 101 are provided with support ribs 111, and the support ribs 111 have a forward-facing inclined surface as a guide surface 112. The support ribs are used to prevent the working blade from wobbling left and right, and the guide surface 112 is used to guide the working blade into the mounting chamber.

Claims

1. A cutting tool with interchangeable blades, characterized in that: include: The first handle (100) has a slit-shaped mounting compartment (101) at the front and a storage compartment (102) at the rear. Both the mounting compartment (101) and the storage compartment (102) are open on the back of the first handle (100). The mounting compartment (101) also has a forward-facing slit channel (103) for inserting or removing a working blade (410) from the slit channel into the mounting compartment. The storage compartment (102) is adapted to store spare blades (420) from its open end. The second handle (200) is rotatably connected to the rear end of the first handle (100) via a pivot (300). The second handle (200) can rotate relative to the first handle (100) to reach the closed position and the unfolded position. When the second handle (200) is in the closed position, it forms a handle with the first handle (100) and covers the mounting chamber (101) and the storage chamber (102), and constrains the working blade (410) in the mounting chamber (101). When the second handle (200) is in the unfolded position, it opens the mounting chamber (101) and the storage chamber (102) and releases the constraint on the working blade (410) so that the working blade (410) can be taken out and put in through the slit channel (103).

2. The cutting tool according to claim 1, characterized in that: The working blade (410) has a slot (401) on its back, and the front of the second shank (200) has a flange (201) facing the slot. When the second shank (200) is in the closed position, the flange (201) is locked in the slot (401) to constrain the working blade (410) to the mounting chamber (101). When the second shank (200) is in the unfolded position, the flange (201) disengages from the slot (401) and releases the constraint on the working blade (410).

3. The cutting tool according to claim 1 or 2, characterized in that: The working blade (410) has a bevel (402), and the front part of the second shank (200) has a pressing part (202). When the second shank (200) is in the closed position, the pressing part (202) presses down on the bevel (402).

4. The cutting tool according to claim 1 or 2, characterized in that: The rear end of the installation compartment (101) has a positioning part (104).

5. The cutting tool according to claim 1, characterized in that: When the second handle (200) is in the closed position, it is constrained together with the first handle (100) by the first constraint structure.

6. The cutting tool according to claim 5, characterized in that: The first constraint structure is a magnetic attraction structure.

7. The cutting tool according to claim 5, characterized in that: The first constraint structure is a snap-fit ​​structure.

8. The cutting tool according to claim 1, characterized in that: When the second handle (200) is in the unfolded position, it is constrained and limited by the second constraint structure.

9. The cutting tool according to claim 8, characterized in that: The rear end of the second handle (200) is provided with an elastic part (203), the elastic part (203) has a first damping part (204), and the second constraint structure includes a blocking part (105) and a second damping part (106) provided at the rear end of the first handle (100). When the second handle (200) is in the unfolded position, the elastic part (203) abuts against the blocking part (105) and the first damping part (204) and the second damping part (106) form a damping engagement.

10. The cutting tool according to claim 1, characterized in that: The second handle (200) can rotate relative to the first handle (100) to reach an intermediate position between the closed position and the unfolded position. When the second handle (200) is in the intermediate position, it is positioned by the damping structure, releases the constraint on the working blade (410), and covers the storage compartment (102).

11. The cutting tool according to claim 10, characterized in that: The rear end of the second handle (200) is provided with an elastic part (203). The damping structure includes a groove (107) and a protrusion (205) respectively provided on the rear end of the first handle and the elastic part. When the second handle (200) is in the middle position, the protrusion (205) is located in the groove (107) to form a damping fit.

12. The cutting tool according to claim 1, characterized in that: The first handle (100) has a first sidewall (108) and a second sidewall (109). The mounting compartment (101) and the storage compartment (102) are defined between the first sidewall (108) and the second sidewall (109). The second handle (200) has a first side (206) and a second side (207). When the second handle (200) is in the closed position, the first side (206) is located outside the first sidewall (108) and the second side (207) is located outside the second sidewall (109).

13. The cutting tool according to claim 1, characterized in that: The side wall of the storage compartment (102) has a notch (110).

14. The cutting tool according to claim 1, characterized in that: Both the first handle (100) and the second handle (200) are integral structures.

15. The cutting tool according to claim 1, characterized in that: The inner walls on both sides of the installation compartment (101) are provided with support ribs (111), and the support ribs (111) have a guide surface (112) facing forward.

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