CN113001594B - Practical knife - Google Patents
Practical knife Download PDFInfo
- Publication number
- CN113001594B CN113001594B CN202011416126.9A CN202011416126A CN113001594B CN 113001594 B CN113001594 B CN 113001594B CN 202011416126 A CN202011416126 A CN 202011416126A CN 113001594 B CN113001594 B CN 113001594B
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- clamping
- groove
- tool
- shell
- tool magazine
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- 238000000605 extraction Methods 0.000 claims abstract description 20
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 210000000078 claw Anatomy 0.000 claims description 6
- 230000005489 elastic deformation Effects 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B1/00—Hand knives with adjustable blade; Pocket knives
- B26B1/08—Hand knives with adjustable blade; Pocket knives with sliding blade
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B5/00—Hand knives with one or more detachable blades
- B26B5/001—Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Abstract
The invention relates to a utility knife, comprising: a shell, a tool post, a tool magazine base and a locking mechanism. The shell is surrounded with a working chamber and a storage chamber; the tool apron is movably accommodated in the working chamber; the tool magazine base is movably inserted in the storage chamber and comprises a storage part and an extraction part which are connected, and the extraction part protrudes out of the shell; the locking and releasing mechanism comprises a base body, a moving piece, a first clamping and supporting part and a second clamping and supporting part, wherein the base body is arranged on the shell, the moving piece is arranged on the base body, the first clamping and supporting part is arranged on the moving piece, the second clamping and supporting part is arranged on the tool magazine base, one of the first clamping and supporting part and the second clamping and supporting part is a clamping groove, and the other clamping and supporting part is a clamping protrusion which can be releasably embedded with the clamping groove. The invention locks through the locking mechanism, so that the tool magazine base can be really combined with the shell to accommodate the spare blade, and the tool magazine base is quite convenient to take out and back into the shell, thereby meeting the requirement of quick use.
Description
Technical Field
The present invention relates to utility knives.
Background
Utility knives (utility knifes), also known as tool knives, utility knives, and utility knives, are configured for one-handed grasping, are commonly used to cut sheet material, such as paper, cut tape, cut fabric, and the like, and are commonly found in processing plants and warehouses, such as taiwan patent I309197, M478597, US2007074402A1, US2003037444A1, and the like.
However, the tool magazine base for storing the spare blades of the utility knife has practical disadvantages, such as that the tool magazine base of taiwan patent I309197 is used by a pivot swing manner, and the hooking point is often too small, so that the fingers of the user cannot be smoothly hooked and unscrewed; the tool magazine seat of taiwan patent I309197 is tightly combined with the housing, and therefore, the tool magazine seat is very likely to fall off unexpectedly or cannot be combined with the housing in a tight fit manner by abrasion; the US patent 2003037444A1 has various opening modes, but has the problems that a rotary cover is easy to open by mistake, a rotary blade is easy to fall off and the like; the problem of the cover being easily lost is that the US2007074402A1 is a problem.
Therefore, there is a need for a new and improved utility knife that solves the above problems.
Disclosure of Invention
The main objective of the present invention is to provide a utility knife, which is locked by a locking mechanism, so that the tool magazine base can be securely combined with the housing to accommodate the spare blade, and the tool magazine base can be conveniently taken out and put back into the housing, thereby satisfying the requirement of rapid use.
To achieve the above object, the present invention provides a utility knife, comprising: a shell, a tool post, a tool magazine base and a locking mechanism. The shell is surrounded with a working chamber and a storage chamber; the tool apron is movably accommodated in the working chamber and used for positioning a working blade; the tool magazine base is movably inserted in the storage chamber and comprises a storage part and an extraction part which are connected, wherein the storage part is used for accommodating at least one spare blade, and the extraction part protrudes out of the shell and is used for hooking external fingers and can move relative to the shell; the locking and releasing mechanism comprises a base body, a moving piece, a first clamping and supporting part and a second clamping and supporting part, wherein the base body is arranged on the shell, the moving piece is arranged on the base body and can move relatively to a locking position and a releasing position, the first clamping and supporting part is arranged on the moving piece to form a synchronous movement relation, the second clamping and supporting part is arranged on the tool magazine base, one of the first clamping and supporting part and the second clamping and supporting part is a clamping groove, and the other clamping and supporting part is a clamping protrusion which can be releasably embedded with the clamping groove; when the moving piece is positioned at the locking position to enable the clamping protrusion to be embedded into the clamping groove, the tool magazine base cannot move to be separated from the shell, and when the moving piece is positioned at the releasing position to enable the clamping protrusion to be separated from the clamping groove, the tool magazine base can take the force applied by the finger part as a power source and is pulled by the finger part to move to be separated from the shell; the casing further comprises an arc concave part, the arc concave part direction of the arc concave part is transverse to the concave direction of the groove, the arc concave part is communicated with the groove, and the finger part passes through the arc concave part.
Preferably, the moving member is slidably sleeved on the base, and the sliding direction of the moving member is transverse to the extracting direction of the tool magazine base.
Preferably, the locking and unlocking mechanism further includes an elastic member disposed between the housing and the moving member to urge the moving member to normally have a tendency of moving toward the locking position.
Preferably, the locking protrusion is in a shape of a barb and is provided with a first inclined surface portion, an outer groove wall of the locking groove is provided with a second inclined surface portion facing the first inclined surface portion, and when the tool magazine base is inserted into the storage chamber from the outside and moves close to the base body, the first inclined surface portion and the second inclined surface portion slide against each other to drive the moving member to move toward the release position.
Preferably, the tool changer further comprises a tool changing knob movably disposed in the housing along a first direction, the tool apron comprises a deformation portion elastically deformable along the first direction, the deformation portion is provided with a positioning portion for inserting and positioning the working blade and a touch portion for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released.
Preferably, the tool magazine further comprises a pressing portion, and a portion of the pressing portion extends into the storage portion for pressing and positioning the at least one spare blade.
Preferably, the pressing part is a sheet body with elastic deformation capability.
Preferably, the moving member is slidably sleeved on the base body, and the sliding direction of the moving member is transverse to the extraction direction of the tool magazine base; the utility knife also comprises a knife changing button which can be movably arranged on the shell along a first direction, the knife holder comprises a deformation part which can elastically deform along the first direction, the deformation part is provided with a positioning part and a touch part, the positioning part is used for embedding and positioning the working blade, and the touch part is used for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released; the tool magazine base further comprises a pressing part, and part of the pressing part extends into the storage part to press and position the at least one spare blade; the pressing part is a sheet body with elastic deformation capability; two connecting claws of the moving part penetrate through the shell and are connected with a push button, the two connecting claws are connected with the sleeve body, and the push button is used for external operation and pressing; the first clamping and abutting part is the clamping protrusion, and the second clamping and abutting part is the clamping groove; the moving element further comprises a sleeve body and two arms, the sleeve body is sleeved on the base body, one ends of the two arms are connected to the sleeve body at intervals, the other ends of the two arms are clamped and connected with the clamping protrusions, the two arms and the clamping protrusions jointly enclose an inserting space, the tool magazine base further comprises an inserting section, the inserting section and the extracting portion are located at two opposite ends of the tool magazine base, the clamping groove penetrates through the inserting section, one side, opposite to the extracting portion, of the inserting section is provided with the second inclined plane portion, and the inserting section can be selectively inserted into the inserting space so that the clamping protrusions are clamped into the clamping groove; the storage part is positioned at one end of the tool magazine base far away from the extraction part, the insertion section protrudes out of the storage part, one side of the storage part, back to the extraction part, is open and is concavely provided with an embedded groove, and when the insertion section is inserted into the insertion space, an arm part is embedded into the embedded groove and extends into the storage part to stop and limit the at least one spare blade; the number of the at least one groove is two, and the two grooves are respectively arranged on two opposite surfaces of the extraction part.
The invention has the advantages that:
the practical knife provided by the invention is locked by the locking and unlocking mechanism, so that the knife magazine seat can be really combined with the shell to accommodate the spare knife blade, and the knife magazine seat is quite convenient to take out and put back the shell, thereby meeting the requirement of quick use.
Drawings
Fig. 1 and fig. 2 are perspective views from different viewing angles according to an embodiment of the present invention.
FIG. 3 is an exploded view of an embodiment of the present invention.
Fig. 4 and 5 are perspective views of a tool magazine base according to an embodiment of the invention from different viewing angles.
FIG. 6 is a partial enlarged view of an embodiment of the present invention.
Fig. 7 and 8 are cross-sectional views illustrating the operation of the locking and unlocking mechanism according to an embodiment of the present invention.
Fig. 9 to 10 are schematic views illustrating movement of the tool holder according to an embodiment of the invention.
Fig. 11 to 12 are schematic views illustrating the actuation of a tool changer according to an embodiment of the present invention.
Detailed Description
The following description is given by way of example only, and is not intended to limit the scope of the present invention.
Referring to fig. 1 to 12, which illustrate an embodiment of the present invention, a utility knife of the present invention includes: a shell 1, a tool holder 2, a tool magazine holder 3 and a locking mechanism 4.
The housing 1 encloses a working chamber 11 and a storage chamber 12, the tool holder 2 is movably accommodated in the working chamber 11 for positioning a working blade 71, and the tool magazine base 3 is movably inserted into the storage chamber 12. In detail, the tool magazine base 3 includes a storage portion 32 and an extraction portion 31 connected to each other, the storage portion 32 is used for receiving at least one spare blade 72, and the extraction portion 31 protrudes from the housing 1 to be hooked by an external finger so as to be movable relative to the housing 1. More specifically, the locking and unlocking mechanism 4 includes a base 41, a moving member 42, a first engaging portion and a second engaging portion, the base 41 is disposed on the housing 1, the moving member 42 is disposed on the base 41 and can move relatively between a locking position and a releasing position, the first engaging portion is disposed on the moving member 42 to move in unison, the second engaging portion is disposed on the tool magazine base 3, one of the first engaging portion and the second engaging portion is a slot 34, and the other is a protrusion 46 that can releasably engage with the slot 34; when the moving member 42 is located at the locking position to make the locking protrusion 46 engage with the locking slot 34, the tool magazine base 3 cannot move away from the housing 1, and when the moving member 42 is located at the releasing position to make the locking protrusion 46 disengage from the locking slot 34, the tool magazine base 3 uses the force applied by the finger portion as a power source and is pulled by the finger portion to move away from the housing 1.
Preferably, the locking mechanism 4 further comprises an elastic member 48, the elastic member 48 is disposed between the housing 1 and the moving member 42 to urge the moving member 42 to have a tendency of moving toward the locking position in a normal state, so that the tool magazine base 3 can be reliably kept at the locking position against an unexpected external force.
In this embodiment, the first engaging portion is the engaging protrusion 46, the second engaging portion is the engaging groove 34, the engaging protrusion 46 is in a shape of a barb and is provided with a first inclined surface portion 47, an outer groove wall of the engaging groove 34 is provided with a second inclined surface portion 35 facing the first inclined surface portion 47, when the tool magazine base 3 is inserted into the storage chamber 12 from the outside and moves toward the base 41, the first inclined surface portion 47 and the second inclined surface portion 35 slide against each other to drive the moving member 42 to move toward the releasing position, and the elastic member 48 is restored to achieve the effect of automatic locking. Moreover, the moving member 42 is slidably sleeved on the base 41, and the sliding direction of the moving member 42 is transverse to the extracting direction of the tool magazine base 3.
More specifically, the moving element 42 further includes a sleeve 43 and two arm portions 44, the sleeve 43 is sleeved on the base 41, one end of each of the two arm portions 44 is connected to the sleeve 43 at intervals, the other end of each of the two arm portions 44 is connected to the corresponding protrusion 46 in a clamping manner, and the two arm portions 44 and the protrusion 46 together enclose an insertion space 45. Moreover, the two connecting claws 49 of the moving member 42 are connected to a push button 51 through the housing 1, the two connecting claws 49 are connected to the sleeve 43, and the push button 51 is pressed by external operation and can be released quickly by pressing. In addition, the tool magazine base 3 further includes an insertion section 33, the insertion section 33 and the extraction portion 31 are located at two opposite ends of the tool magazine base 3, the locking slot 34 is disposed through the insertion section 33, the second inclined plane portion 35 is disposed on a side of the insertion section 33 opposite to the extraction portion 31, the insertion section 33 can be selectively inserted into the insertion space 45, so that the locking protrusion 46 is locked into the locking slot 34; wherein, the inserting and matching of the inserting space 45 and the inserting section 33 can improve the combination accuracy, and has the function of guiding the inserting direction to prevent the fool.
More specifically, the storage part 32 is located at an end of the tool magazine base 3 away from the drawing part 31, the inserting section 33 protrudes out of the storage part 32, one side of the storage part 32 opposite to the drawing part 31 is open and is concavely provided with an inserting groove 37, when the inserting section 33 is inserted into the inserting space 45, an arm 44 is inserted into the inserting groove 37 and extends into the storage part 32 for stopping and limiting the at least one spare blade 72, thereby simultaneously improving the placing stability of the at least one spare blade 72 and the stability of the tool magazine 2 inserted into the housing 1.
Preferably, the tool magazine base 3 further comprises a pressing portion 36, and a portion of the pressing portion 36 extends into the storage portion 32 for pressing and positioning the at least one spare blade 72, so as to substantially and firmly position the at least one spare blade 72, thereby providing a better synchronous action effect. In the present embodiment, the pressing portion 36 is a sheet with elastic deformation capability, so as to insert or extract the at least one spare blade 72.
Preferably, the extracting portion 31 is provided with at least one groove 311, the recess direction of the at least one groove 311 is transverse to the extracting direction of the tool magazine base 3, the at least one groove 311 protrudes from the portion of the housing 1 for the fingers to extend into and hook the extracting portion 31 to move, in this embodiment, the number of the at least one groove 311 is two, and the two grooves 311 are respectively disposed on two opposite surfaces of the extracting portion 31.
Preferably, the housing 1 further comprises an arc recess 13, the arc recess direction of the arc recess 13 is transverse to the recess direction of the groove 311, and the arc recess 13 is connected to the groove 311 to further provide a space margin for the finger, and the arc recess 13 is provided for the finger to pass through.
The utility knife further includes a tool changing button 52, the tool changing button 52 can be movably disposed on the housing 1 along a first direction 6, the knife holder 2 includes a deformation portion 21, the deformation portion 21 can elastically deform along the first direction 6, the deformation portion 21 is provided with a positioning portion 211 and a touching portion 212, the positioning portion 211 is used for embedding and positioning the working blade 71, and the touching portion 212 is used for crossing the working blade 71. It can be understood that the tool holder 2 can move to a predetermined position along the first direction 6, when the tool holder 2 is located at the predetermined position, the trigger 212 is located on the moving path of the tool changing button 52, the tool changing button 52 is pushed against the trigger 212 by an external operation to deform the deformation portion 21, so that the positioning portion 211 is disengaged from the working blade 71 to release the working blade 71, and at this time, a user can pull out the working blade 71 for replacement or turning.
The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solution of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.
Claims (5)
1. A utility knife, comprising:
a shell, which encloses a working chamber and a storage chamber;
a cutter seat movably accommodated in the working chamber for positioning a working blade;
the tool magazine seat is movably inserted in the storage chamber and comprises a storage part and an extraction part which are connected, the storage part is used for accommodating at least one spare blade, and the extraction part protrudes out of the shell and is used for hooking external fingers and can move relative to the shell; and
a locking and releasing mechanism, which comprises a base body, a moving member, a first clamping and supporting part and a second clamping and supporting part, wherein the base body is arranged on the shell, the moving member is arranged on the base body and can relatively move between a locking position and a releasing position, the first clamping and supporting part is arranged on the moving member to form a synchronous movement relation, the second clamping and supporting part is arranged on the tool magazine base, one of the first clamping and supporting part and the second clamping and supporting part is a clamping groove, and the other clamping and supporting part is a clamping protrusion which can be releasably embedded with the clamping groove;
when the moving member is located at the release position to enable the clamping protrusion to be separated from the clamping groove, the tool magazine base takes the force applied by the finger parts as a power source and is pulled by the finger parts to move so as to be separated from the shell;
wherein, the extraction part is provided with at least one groove, the notch direction of the at least one groove is transverse to the extraction direction of the tool magazine seat, the part of the at least one groove protruding out of the shell is used for the finger part to extend into and drive the extraction part to move in a hooking way, the shell further comprises an arc concave part, the arc notch direction of the arc concave part is transverse to the notch direction of the groove, the arc concave part is communicated with the groove, and the arc concave part can be used for the finger part to pass through;
the moving piece is slidably sleeved on the base body, and the sliding direction of the moving piece is transverse to the extracting direction of the tool magazine base;
the locking and unlocking mechanism further comprises an elastic piece which is arranged between the shell and the moving piece so as to drive the moving piece to normally have a tendency of moving towards the locking position;
the clamping protrusion is in a barb shape and is provided with a first inclined plane part, the outer groove wall of the clamping groove is provided with a second inclined plane part facing the first inclined plane part, and when the tool magazine base is inserted into the storage chamber from the outside and moves towards the base body to approach, the first inclined plane part and the second inclined plane part slide against each other so as to drive the moving member to move towards the release position.
2. The utility knife according to claim 1, further comprising a tool changer movably disposed in the housing along a first direction, the tool holder comprising a deformable portion elastically deformable along the first direction, the deformable portion having a positioning portion for inserting and positioning the working blade and a touch portion for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released.
3. The utility knife of claim 1 or 2, wherein the magazine base further comprises a pressing portion, a portion of the pressing portion extending into the storage portion for pressing and positioning the at least one spare blade.
4. The utility knife of claim 3, wherein the pressing portion is a sheet having elastic deformation capability.
5. The utility knife according to claim 1, wherein the utility knife further comprises a tool changing knob movably disposed in the housing along a first direction, the tool holder comprises a deformation portion elastically deformable along the first direction, the deformation portion has a positioning portion for inserting and positioning the working blade and a touching portion for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released; the tool magazine base further comprises a pressing part, and part of the pressing part extends into the storage part to press and position the at least one spare blade; the pressing part is a sheet body with elastic deformation capability; the moving piece further comprises a sleeve body and two arm parts, two connecting claws of the moving piece penetrate through the shell body and are connected with a push button, the two connecting claws are connected with the sleeve body, and the push button is pressed by external operation; the first clamping and abutting part is the clamping protrusion, and the second clamping and abutting part is the clamping groove; the sleeve body is sleeved on the base body, one end of each of the two arms is connected to the sleeve body at intervals, the other end of each of the two arms is clamped and connected with the clamping protrusion, the two arms and the clamping protrusions together enclose an inserting space, the tool magazine base further comprises an inserting section, the inserting section and the extracting part are located at two opposite ends of the tool magazine base, the clamping groove penetrates through the inserting section, one side of the inserting section, which faces away from the extracting part, is provided with the second inclined plane part, and the inserting section can be selectively inserted into the inserting space so that the clamping protrusion is clamped into the clamping groove; the storage part is positioned at one end of the tool magazine base far away from the extraction part, the insertion section protrudes out of the storage part, one side of the storage part, back to the extraction part, is open and is concavely provided with an embedded groove, and when the insertion section is inserted into the insertion space, an arm part is embedded into the embedded groove and extends into the storage part to stop and limit the at least one spare blade; the number of the at least one groove is two, and the two grooves are respectively arranged on two opposite surfaces of the extraction part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011416126.9A CN113001594B (en) | 2020-12-07 | 2020-12-07 | Practical knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011416126.9A CN113001594B (en) | 2020-12-07 | 2020-12-07 | Practical knife |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113001594A CN113001594A (en) | 2021-06-22 |
| CN113001594B true CN113001594B (en) | 2023-01-24 |
Family
ID=76383200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011416126.9A Active CN113001594B (en) | 2020-12-07 | 2020-12-07 | Practical knife |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113001594B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6192589B1 (en) * | 1999-06-25 | 2001-02-27 | The Stanley Works | Utility knife |
| TW454660U (en) * | 2000-07-20 | 2001-09-11 | Leefan Yu Fang | Art knife |
| TW469913U (en) * | 2000-10-23 | 2001-12-21 | Kuen-Jen Chen | Improved structure for craft knife |
| US6415514B1 (en) * | 2000-08-03 | 2002-07-09 | Tseng Min Chun | Artistic knife with replaceable blade magazine |
| TWM275082U (en) * | 2004-06-25 | 2005-09-11 | Yi-Ying Chen | Blade box of utility knife |
| CN201317003Y (en) * | 2008-12-17 | 2009-09-30 | 王爱国 | Utility knife with stored blade |
| CN203438249U (en) * | 2013-07-25 | 2014-02-19 | 王爱国 | Art knife |
| CN215589227U (en) * | 2020-12-07 | 2022-01-21 | 明欣国际有限公司 | Practical knife |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM259687U (en) * | 2004-03-03 | 2005-03-21 | Chi Whi Ind Inc | Utility knife |
| US20120073142A1 (en) * | 2010-09-24 | 2012-03-29 | Zeng min-zheng | Cutting Apparatus |
-
2020
- 2020-12-07 CN CN202011416126.9A patent/CN113001594B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6192589B1 (en) * | 1999-06-25 | 2001-02-27 | The Stanley Works | Utility knife |
| TW454660U (en) * | 2000-07-20 | 2001-09-11 | Leefan Yu Fang | Art knife |
| US6415514B1 (en) * | 2000-08-03 | 2002-07-09 | Tseng Min Chun | Artistic knife with replaceable blade magazine |
| TW469913U (en) * | 2000-10-23 | 2001-12-21 | Kuen-Jen Chen | Improved structure for craft knife |
| TWM275082U (en) * | 2004-06-25 | 2005-09-11 | Yi-Ying Chen | Blade box of utility knife |
| CN201317003Y (en) * | 2008-12-17 | 2009-09-30 | 王爱国 | Utility knife with stored blade |
| CN203438249U (en) * | 2013-07-25 | 2014-02-19 | 王爱国 | Art knife |
| CN215589227U (en) * | 2020-12-07 | 2022-01-21 | 明欣国际有限公司 | Practical knife |
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| Publication number | Publication date |
|---|---|
| CN113001594A (en) | 2021-06-22 |
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