CN111844141A - Cutter with quick replaceable blade - Google Patents
Cutter with quick replaceable blade Download PDFInfo
- Publication number
- CN111844141A CN111844141A CN202010599718.2A CN202010599718A CN111844141A CN 111844141 A CN111844141 A CN 111844141A CN 202010599718 A CN202010599718 A CN 202010599718A CN 111844141 A CN111844141 A CN 111844141A
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- Prior art keywords
- blade
- handle
- bayonet
- bayonet lock
- quick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 33
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000926 separation method 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
- B26B5/00—Hand knives with one or more detachable blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B9/00—Blades for hand knives
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
Abstract
The invention provides a cutting knife with a quick-replaceable blade, which comprises a pair of hinged handles and a blade arranged at the shearing end of the handles. When the blade is locked on the handle through the blade locking device, the cutting knife can be normally used; if the blade needs to be replaced, the blade locking device is switched to the state of unlocking the blade, and the blade can be conveniently detached. The cutter blade of the cutter blade quick-change type is convenient to replace, so that the maintenance convenience can be greatly improved, the service life of a handle of the cutter blade can be maximally utilized, the integral utilization rate of the cutter blade is greatly improved, and the reduction of the cost of the cutter blade is facilitated.
Description
Technical Field
The present invention relates to a hand tool, and more particularly, to a blade quick-change type cutting knife.
Background
The cutting knife is a common cutting tool and is usually used for cutting off pipes such as hoses and plastic pipes, blades on the common cutting knife are difficult to replace, if the common cutting knife needs to be replaced, the whole tool shell or a plurality of positioning pins need to be disassembled, the common cutting knife is difficult to replace and troublesome for general consumers, even the blades can not be assembled properly after replacement, and small parts in the process of disassembly are easy to lose, so that the whole tool is discarded. On the other hand, the blade of the cutting knife is frequently cut, the cutting edge is easy to damage, the handle is not easy to damage, and the whole tool needs to be discarded after the blade is damaged, so that the method is not economical. If the blade can be quickly replaced, the use cost can be greatly saved. US patent publication No. US4336652, entitled "plastic hose cutter", 6.29.1982, discloses a plastic hose cutting tool comprising a pair of handles riveted at the middle, one handle having a blade mounted thereon, the blade having a longitudinal cutting edge, the other handle having a semi-circular concave surface at the end, the concave surface having a recess for receiving the cutting edge of the blade when the handles are brought together, and the hose being cut by the blade when placed on the semi-circular concave surface. However, in this patent, it is necessary to operate a plurality of screws and rivet bars when the insert is attached and detached, which is difficult for many consumers to replace the insert quickly as described above.
Disclosure of Invention
The invention provides a blade quick-change type cutting knife which has an improved structure and is convenient to operate, so that a blade is convenient to replace, and the cutting knife is fully utilized.
The technical scheme of the invention is as follows: the utility model provides a blade quick change formula cutting knife, includes a pair of articulated handle and installs the blade at the handle end of cuting, and this blade quick change formula cutting knife still includes blade locking device, and blade locking device has two kinds of operating condition of locking blade and unblock blade. When the blade is locked on the handle through the blade locking device, the cutting knife can be normally used; if the blade needs to be replaced, the blade locking device is switched to the state of unlocking the blade, and the blade can be conveniently detached. The cutter blade of the cutter blade quick-change type is convenient to replace, so that the maintenance convenience can be greatly improved, the service life of a handle of the cutter blade can be maximally utilized, the integral utilization rate of the cutter blade is greatly improved, and the reduction of the cost of the cutter blade is facilitated.
Preferably, the blade locking device comprises a movable bayonet and a spring, the bayonet is connected to a handle, the spring is arranged between the bayonet and the handle, and the bayonet can be clamped with and separated from the blade. The spring provides pretightening force for the bayonet lock, so that the bayonet lock is clamped with the blade in a natural state, and the blade is locked. When the blade is unlocked, the clamping pin and the blade are unlocked only by temporarily exerting force to overcome the pretightening force of the spring. The blade locking device with the structure can complete the locking and unlocking of the blade only by carrying out simple poking operation of the bayonet lock, and does not need to use tools in each step, thereby being greatly convenient to operate.
Preferably, the blade is provided with a clamping groove, the handle is provided with a sliding groove, the sliding groove corresponds to the clamping groove in position, the clamping pin is connected in the sliding groove in a sliding mode, and the spring drives the clamping pin to move towards the clamping groove. The spring drives the bayonet lock to move towards the clamping groove in a natural state, and the bayonet lock is embedded into the clamping groove to realize clamping connection of the bayonet lock and the blade, so that the blade is locked; when the blade is unlocked, the bayonet lock is pushed to overcome the pretightening force of the spring to withdraw from the bayonet lock, so that the bayonet lock and the blade can be unlocked.
As an alternative, a clamping groove is formed in the blade, the clamping pin is rotatably connected to the handle, and the spring drives the clamping pin to rotate and be embedded into the clamping groove. The spring drives the bayonet lock to rotate towards the clamping groove in a natural state, and the bayonet lock is embedded into the clamping groove to realize clamping connection of the bayonet lock and the blade, so that the blade is locked; when the blade is unlocked, the bayonet lock is pushed to overcome the pretightening force of the spring to withdraw from the bayonet lock, so that the bayonet lock and the blade can be unlocked.
Preferably, the axis of rotation of the bayonet is parallel to the plane of the blade. The rotating shaft of the clamping pin is parallel to the plane of the blade, so that the rotating surface of the clamping pin is perpendicular to the plane of the blade, and the clamping pin can be smoothly crossed and embedded with the clamping groove.
Alternatively, the axis of rotation of the bayonet is perpendicular to the plane of the blade. The rotating shaft of the clamping pin is perpendicular to the plane of the blade, so that the rotating surface of the clamping pin is parallel to the plane of the blade or coincides with the plane of the blade, and the clamping pin can be embedded with the clamping groove by accurately controlling an intersection point.
Preferably, the inlet and outlet sides of the bayonet lock of the clamping groove are provided with an inlet, and the inner wall of the inlet is provided with a guide inclined plane. The rotation face of bayonet lock is on a parallel with the blade plane or with under the circumstances of blade plane coincidence, the bayonet lock need with the accurate cooperation of draw-in groove just can imbed the draw-in groove, otherwise very easily before the embedding draw-in groove with the blade outer fringe take place to interfere, set up the introducing port and make the draw-in groove notch wideer, the bayonet lock can get into the draw-in groove notch earlier to get into gradually along the direction inclined plane, until thoroughly embedding the draw-in groove. The guide-in opening is arranged to enable the clamping pin to enter the clamping groove more easily.
Preferably, the cutting end of the handle is also provided with a stop pin, the blade is provided with a bayonet, and the stop pin is embedded into the bayonet in a matching way. The stop pin is matched with the bayonet to form another fixed point on the blade, and the stop pin and the bayonet form two-point support on the blade, so that the blade can be stably installed.
Preferably, the handle is provided with a shell, the shell is detachably connected with the handle, the shell comprises a front shell and a back shell, the front shell and the back shell are clamped on the front side and the back side of the handle, and the edge of the blade is embedded in a crack between the front shell and the back shell. The edge of the blade is embedded into the crack of the front shell and the back shell, the edge of the blade is supported by the shells, and the blade can be reliably fixed on the handle by combining the positioning of the bayonet lock and the stop pin.
Alternatively, the handle is provided with a shell, the shell and the handle are integrally formed, the shell comprises a front shell and a back shell, the front shell and the back shell are clamped on the front side and the back side of the handle, and the edge of the blade is embedded in a gap between the front shell and the back shell. The shell and the handle are integrally formed, so that the production process can be simplified during production.
The invention has the beneficial effects that:
the blade is convenient to replace. The blade of the invention is convenient to replace, thus greatly improving the maintenance convenience, maximizing the service life of the handle of the cutting knife, greatly improving the overall utilization rate of the cutting knife and being beneficial to reducing the cost of the cutting knife.
Drawings
FIG. 1 is an exploded view of a part of the present invention;
FIG. 2 is a schematic structural diagram of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a sectional view taken along the line A-A;
FIG. 5 is a sectional view taken along the line B-B;
FIG. 6 is a sectional view taken along the direction C-C;
FIG. 7 is another schematic structural view of the present invention;
FIG. 8 is a partial schematic view of the blade locking mechanism of FIG. 7;
FIG. 9 is a schematic structural view in example 3 of the present invention;
fig. 10 is a schematic view showing an unlocking blade state in embodiment 3 of the present invention;
FIG. 11 is a schematic structural view in example 4 of the present invention;
Fig. 12 is a schematic view showing a state of a locking blade in embodiment 4 of the present invention.
In the figure, 1-handle, 2-blade, 3-bayonet lock, 4-spring, 5-sliding groove, 6-clamping groove, 7-rotating shaft, 8-leading-in port, 9-guiding inclined plane, 10-stop pin, 11-bayonet, 12-locking end, 13-sliding push key, 14-barb branch, 15-limiting rib, 16-torsion spring groove, 17-torsion spring, 18-shell, 19-lock catch, 20-lock catch groove, 21-pressing key, 22-safety pin, 23-slot, 24-limiting pin and 25-handle sleeve.
Detailed Description
The invention is further illustrated by the following specific embodiments in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1 to 6, the cutter with the quick-change type blade comprises a pair of handles 1, a blade 2 and a blade locking device, wherein the two handles 1 are hinged at the middle front part through a screw and a matched pivot shaft with internal threads to form a shearing end and a holding end, and a handle sleeve 25 is sleeved on the holding end. The handle 1 comprises a first handle and a second handle, and the blade 2 is mounted at the cutting end of the second handle 1. The blade locking device has two working states of locking and unlocking the blade. Blade locking device includes movable bayonet lock 3 and spring 4, and bayonet lock 3 is connected on the second handle, and spring 4 is located bayonet lock 3 and 3 handle 1 in bayonet lock and is the second handle between, and bayonet lock 3 can with 2 joint of blade and separation. One end of the bayonet pin 3 is provided with a step-shaped lock end 12, the other end is welded with an exposed sliding push key 13, and the sliding push key 13 is provided with anti-skid grains. Be equipped with draw-in groove 6 on the blade 2, be equipped with spout 5 on the handle 1, spout 5 corresponds with draw-in groove 6 position, and bayonet lock 3 sliding connection is in spout 5, and spring 4 drives bayonet lock 3 and moves to draw-in groove 6. The outer side edge of the middle front part of the bayonet 3 is provided with a notch, the outer side of the bayonet 3 extends out of a barb-shaped branch 14 parallel to the main body of the bayonet 3, the inner wall of the outer side of the bayonet 6 is provided with a protruding limiting rib 15, the barb-shaped branch 14 and the limiting rib 15 are both positioned in the notch, the spring 4 is a pressure spring, the front end of the spring 4 is sleeved on the barb-shaped branch 14, the tail end of the spring 4 abuts against the limiting rib 15, and the lock end 12 is matched with the bayonet 6 under the condition of no external force, so that the blade is locked. The cutting end of the handle 1 is also provided with a stop pin 10, the blade 2 is provided with a bayonet 11, and the stop pin 10 is embedded into the bayonet 11 in a matching way. The stop pin 10 and the clamping pin 3 ensure that the blade 2 is reliably locked. Be equipped with detachable casing 18 on handle 1, casing 18 includes front casing and back casing, and front casing and back casing clamp are at handle 1 two sides just, back of the body, and wherein the front casing and the back casing of first handle are fixed through the pin because of need not frequently to open, and the front casing and the back casing of second handle are then through screw connection, and blade 2 edge is set in the crack of front casing and back casing. A torsion spring groove 16 is formed in a shell 18 of the first handle, a torsion spring 17 is arranged in the torsion spring groove 16, one end of the torsion spring 17 abuts against the shell 18 of the first handle, the other end of the torsion spring 17 abuts against the shell 18 of the second handle, and the torsion spring 17 provides power for opening the first handle and the second handle. A lock catch structure which enables the two handles 1 to keep folded is arranged between the two handles 1 and comprises a lock catch 19 and a lock catch groove 20, the lock catch 19 is hinged on the second handle, the lock catch groove 20 is positioned at the edge of the first handle, and after the lock catch 19 is clamped in the lock catch groove 20, the opening force of the torsion spring 17 can be overcome.
The spring 4 drives the bayonet lock 3 to move towards the clamping groove 6 in a natural state, and the bayonet lock 3 is embedded into the clamping groove 6 to realize clamping connection with the blade 2, so that the blade 2 is locked; when the blade 2 is unlocked, the shell 18 of the second handle is taken down, the sliding push key 13 of the bayonet 3 is pushed, the bayonet 3 overcomes the pretightening force of the spring 4 to move, the lock end 12 is withdrawn from the bayonet 6, and the bayonet 3 and the blade 2 can be unlocked. The blade 2 is then moved so that the catch 10 is withdrawn from the bayonet 11 and the blade 2 is removed. After a new blade 2 bayonet 11 is aligned with the stop pin 10 and clamped, the blade 2 is slowly rotated by taking the stop pin 10 as a rotating shaft, the bayonet 3 and the clamping groove 6 are gradually approached and finally butted, the bayonet 3 is popped into the clamping groove 6 to complete the replacement of the blade 2, and finally the shell 18 of the second handle is installed back.
Example 2:
as shown in fig. 7 and 8, a clamping groove 6 is arranged on the blade 2, and a rotating shaft 7 is arranged on the bayonet 3, so that the bayonet 3 is rotatably connected to the second handle. One end of the bayonet pin 3 is provided with a stepped lock end 12, the other end of the bayonet pin is integrally provided with a pressing key 21, the spring 4 is a pressure spring, the spring 4 is positioned below the pressing key 21, and the spring 4 drives the bayonet pin 3 to rotate and be embedded into the bayonet slot 6. The axis of rotation 7 of bayonet 3 is parallel to the plane of blade 2 or coplanar with blade 2. The rest is the same as example 1.
In a natural state, the spring 4 drives the bayonet lock 3 to rotate towards the bayonet groove 6 in a direction vertical to the plane of the blade 2, and the bayonet lock 3 is embedded into the bayonet groove 6 to realize the clamping connection with the blade 2, so that the blade is locked; when the blade 2 is unlocked, the pressing key 21 is pressed down against the pretightening force of the spring 4, the locking end 12 of the clamping pin 3 is tilted, the clamping groove 6 is withdrawn, the clamping between the clamping pin 3 and the blade 2 can be released, and then the blade 2 can be taken down and replaced by a new blade.
Example 3:
as shown in fig. 9, a rotating shaft 7 of the bayonet lock 3 is perpendicular to the plane of the blade 2, one side of a notch of the bayonet lock 6 is a bayonet lock inlet and outlet side, the other side of the notch is a bayonet lock clamping side, the bayonet lock clamping side is matched with a step-shaped lock end 12 of the bayonet lock 3, an inlet 8 for expanding the notch of the bayonet lock 6 is arranged on the bayonet lock inlet and outlet side of the bayonet lock 6, and a guide inclined surface 9 is arranged on the inner wall of. The spring 4 is a tension spring, one end of the clamping groove 6 is a stepped lock end 12, the other end of the clamping groove is a toggle end, and the spring 4 is connected between the toggle end and the second handle. The second handle is provided with a safety pin 22, and the safety pin 22 can slide and is used for blocking the rotation of the poking end. The rest is the same as example 2.
In a natural state, the spring 4 drives the bayonet lock 3 to rotate towards the bayonet groove 6 in a direction parallel to the plane of the blade 2, and the bayonet lock gradually enters along the guide inclined plane 9 after entering the notch of the bayonet groove 6 until the bayonet lock is completely embedded into the bayonet groove 6, so that the bayonet lock 4 is clamped with the blade 2, and the blade 2 is locked; as shown in fig. 10, when the blade 2 is unlocked, the safety pin 22 is pressed down and the poking end is poked against the pretightening force of the spring 4, so that the locking end 12 of the bayonet 3 swings outwards and exits from the bayonet 6, the bayonet 3 and the blade 2 can be unlocked, and the blade 2 can be taken down and replaced with a new blade.
Example 4:
As shown in fig. 11, the shell 18 is not provided on the handles 1, the first handle is provided with a slot 23, and the second handle can be inserted into the slot 23, and the two handles 1 are fixed in a hinged manner by male and female screws. As shown in FIG. 12, the latch 3 slides in the slide groove 5, and the lock end 12 of the latch 3 can be locked with the latch groove 6. The spring 4 is a compression spring, and the spring 4 is positioned between the tail end of the bayonet 3 and the end wall of the sliding groove 5. And a limiting pin 24 is further arranged on the outer side of the sliding groove 5, and the top of the bayonet 3 is limited after the bayonet is assembled, so that the bayonet 3 is prevented from falling out. The rest is the same as example 1.
Example 5:
the housing 18 is integrally formed with the handle. The rest is the same as example 1.
Claims (10)
1. A cutter with a quick-change blade comprises a pair of hinged handles (1) and a blade (2) arranged at the cutting end of the handles (1), and is characterized by further comprising a blade locking device, wherein the blade locking device has two working states of locking the blade and unlocking the blade.
2. The cutting knife with the quick-change type blade as claimed in claim 1, characterised in that the blade locking device comprises a movable bayonet lock (3) and a spring (4), the bayonet lock (3) is connected to a handle (1), the spring (4) is arranged between the bayonet lock (3) and the handle (1), and the bayonet lock (3) can be clamped and separated with the blade (2).
3. The cutting knife with the quick-change type blade as claimed in claim 2, characterized in that the blade (2) is provided with a slot (6), the handle (1) is provided with a sliding groove (5), the sliding groove (5) corresponds to the slot (6), the bayonet lock (3) is slidably connected in the sliding groove (5), and the spring (4) drives the bayonet lock (3) to move towards the slot (6).
4. The cutting knife with the quick-change type blade as claimed in claim 2, characterized in that the blade (2) is provided with a slot (6), the bayonet lock (3) is rotatably connected to the handle (1), and the spring (4) drives the bayonet lock (3) to rotate and be embedded in the slot (6).
5. The quick-change cutter for blades as claimed in claim 4, characterized in that the axis of rotation (7) of the detent (3) is parallel to the plane of the blade (2).
6. The quick-change cutter for blades as claimed in claim 4, characterized in that the axis of rotation (7) of the detent (3) is perpendicular to the plane of the blade (2).
7. The quick-change blade cutter as claimed in claim 6, characterized in that the bayonet lock inlet and outlet sides of the bayonet lock (6) are provided with an inlet (8), and the inner wall of the inlet (8) is provided with a guide bevel (9).
8. The cutting knife with the quick replaceable blade as claimed in claim 1, characterized in that the cutting end of the handle (1) is further provided with a stop pin (10), the blade (2) is provided with a bayonet (11), and the stop pin (10) is inserted into the bayonet (11) in a matching manner.
9. The cutting knife with the quick replaceable blade as claimed in any one of claims 1 to 8, characterized in that the handle (1) is provided with a housing which is detachably connected with the handle (1), the housing comprises a front housing and a back housing, the front housing and the back housing are clamped on the front and back sides of the handle (1), and the edge of the blade (2) is embedded in the gap between the front housing and the back housing.
10. The cutting knife with the quick replaceable blade as claimed in any one of claims 1 to 8, characterized in that the handle (1) is provided with a housing, which is integrally formed with the handle (1), the housing comprises a front housing and a back housing, the front housing and the back housing are clamped on the front and back sides of the handle (1), and the edge of the blade (2) is embedded in the gap between the front housing and the back housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599718.2A CN111844141A (en) | 2020-06-28 | 2020-06-28 | Cutter with quick replaceable blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599718.2A CN111844141A (en) | 2020-06-28 | 2020-06-28 | Cutter with quick replaceable blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111844141A true CN111844141A (en) | 2020-10-30 |
Family
ID=72988720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010599718.2A Pending CN111844141A (en) | 2020-06-28 | 2020-06-28 | Cutter with quick replaceable blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111844141A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201095115Y (en) * | 2007-10-22 | 2008-08-06 | 杭州巨星科技有限公司 | Hand knife convenient for replacing blade |
| US20160059327A1 (en) * | 2014-08-26 | 2016-03-03 | Ningbo Ant Tools Co., Ltd. | Pipe cutting knife |
| CN108237560A (en) * | 2016-12-27 | 2018-07-03 | 杭州巨星科技股份有限公司 | A kind of cutting tool of changeable blade |
| CN209350289U (en) * | 2018-12-28 | 2019-09-06 | 杭州巨星科技股份有限公司 | Hand foldable knife |
| CN213320240U (en) * | 2020-06-28 | 2021-06-01 | 浙江巨星工具有限公司 | Cutter with quick replaceable blade |
-
2020
- 2020-06-28 CN CN202010599718.2A patent/CN111844141A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201095115Y (en) * | 2007-10-22 | 2008-08-06 | 杭州巨星科技有限公司 | Hand knife convenient for replacing blade |
| US20160059327A1 (en) * | 2014-08-26 | 2016-03-03 | Ningbo Ant Tools Co., Ltd. | Pipe cutting knife |
| CN108237560A (en) * | 2016-12-27 | 2018-07-03 | 杭州巨星科技股份有限公司 | A kind of cutting tool of changeable blade |
| CN209350289U (en) * | 2018-12-28 | 2019-09-06 | 杭州巨星科技股份有限公司 | Hand foldable knife |
| CN213320240U (en) * | 2020-06-28 | 2021-06-01 | 浙江巨星工具有限公司 | Cutter with quick replaceable blade |
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