TWI652154B - Replaceable blade - Google Patents

Abstract

A replacement blade comprising a blade body having a long strip shape, one side of the blade body engraved with a plurality of fracture grooves, each of the fracture grooves extending across the two side edges of the blade body, each fracture groove comprising a collinear arrangement The plurality of groove segments are arranged, and the groove segments of each of the fracture grooves are arranged at intervals along the longitudinal direction of each of the fracture grooves. It has a broken broken groove and is not easily broken by mistake.

Description

Replacement blade

The present invention relates to a blade, and more particularly to a replacement blade having a broken break groove.

The existing replacement blade is generally provided with a fracture groove of the transverse blade on the side surface thereof. When the blade tip is used for passivation, the user can easily break the blade along the fracture groove to form a new blade edge.

If the depth of the fracture groove is deeper, the easier it is to break, but at the same time, the structure of the portion of the blade is weak, and it is easy to break when using a blade cutter or a blade falling against the ground. Moreover, today, there are more ceramic-made blades, which are more brittle than the old metal blades and are prone to breakage at the broken grooves.

In view of the above, the present inventors have made great efforts to solve the above problems in view of the above-mentioned prior art, and have made great efforts to solve the above problems, which has become the object of improvement of the present inventors.

The present invention provides a replacement blade having a broken break groove that is less prone to breakage.

The invention provides a replacement blade, which comprises a blade body, the blade body is in the form of a long strip, and one side of the blade body is engraved with a plurality of fracture grooves, and each of the fracture grooves extends across the two side edges of the blade body, and each of the fracture grooves comprises a total of The plurality of groove segments arranged in a line, and the groove segments of each of the fracture grooves are arranged at a distance from each other along the longitudinal direction of each of the fracture grooves.

In the replacement blade of the present invention, one side edge of the blade body is formed with a cutting edge, and the other side edge of the blade body is formed with a blade back with respect to the blade edge. The depth of the near cutting edge of each breaking groove is shallower than the depth near the back. The depth of each of the groove segments of each of the fracture grooves is shallower than the depth at the vicinity of the blade. The width of the near cutting edge of each breaking groove is narrower than the width of the near knife back. The width of each of the groove segments of each of the fracture grooves is narrower than the width of the near blade. Each of the fracture grooves is a V-shaped groove. The blade can be made of metal. The blade body can be made of ceramic. The other side of the blade is provided with a plurality of additional breaking grooves corresponding to the positions of the broken grooves. One end of the blade body forms a cutting edge, and the other end of the blade body has a mounting hole.

In the replacement blade of the present invention, each of the breaking grooves has a plurality of groove segments to form a broken-shaped breaking groove, so that the breaking groove is not excessively weak and is broken under unintended operation.

100‧‧‧Tools

101‧‧‧blade

102‧‧‧ knife back

103‧‧‧Tool tip

104‧‧‧Mounting holes

110‧‧‧breaking trough

111‧‧‧Slot

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a replacement blade in accordance with a preferred embodiment of the present invention.

Figure 2 is a partial enlarged view of a replacement blade in accordance with a preferred embodiment of the present invention.

Figure 3 is a longitudinal cross-sectional view of the replacement blade of Figure 2 taken along line 3-3.

Figure 4 is a transverse cross-sectional view of the replacement blade of Figure 2 taken along line 4-4.

Referring to Figures 1 through 4, a preferred embodiment of the present invention provides a replacement blade for use in a shank (not shown). In the present embodiment, the replacement blade of the present invention comprises a blade body 100. The blade body 100 can be made of metal, ceramic or a mixed material, and the invention is not limited thereto. The blade body 100 is preferably in the form of a long strip. The longitudinal edge of the blade body 100 is formed with a cutting edge 101. The other side edge of the blade body 100 is formed with a blade back 102 opposite to the blade edge 101. One end of the blade body 100 is obliquely cut. A cutting edge 103 is formed on the side of the blade 101, and a mounting hole 104 is formed at the other end of the blade 100 to fasten the blade 100 to the shank.

A plurality of fracture grooves 110 are formed on one side of the blade body 100. The fracture grooves 110 respectively extend across the two side edges of the blade body 100. The fracture grooves 110 are respectively disposed obliquely with respect to the longitudinal direction of the blade body 100, and the fracture grooves 110 are preferably disposed. The ground ends are spaced apart from one end of the cutting edge 103, so that each of the breaking grooves 110 can be broken to form a new cutting edge 103 at the cutting edge 101.

Each of the fracture grooves 110 is a V-shaped groove, and each of the fracture grooves 110 is broken and includes a plurality of groove segments 111 arranged in a line, and preferably each groove segment 111 is also a V-shaped groove. Compared with the rectangular groove used in the prior art, when the blade body 100 is broken, a plurality of stress concentration points are formed at the corners in the rectangular groove, and the different positions of the breaking groove 110 may be broken at different corners, thus making the fracture The green side is uneven. The breaking groove 110 of the present invention is a V-shaped groove, and only a single corner is formed at the tip end of the groove bottom, so that there is only a single stress concentration place, and when the blade body 100 is broken, the broken edge green can be ensured.

The depth of the near cutting edge 101 of each of the fracture grooves 110 is shallower than the depth at the near blade back 102. Further, preferably, the depth of each of the groove segments 111 of each of the fracture grooves 110 is shallower than the depth at the vicinity of the blade 102. Therefore, the structural strength of the blade body 100 can be evenly distributed along the longitudinal direction of the break groove 110.

The width of the proximal edge 101 of each of the fracture grooves 110 is narrower than the width of the near blade 102. Further, it is preferable that the width of the closer edge 101 of each groove section 111 of each of the fracture grooves 110 is narrower than the width of the near blade back 102. Therefore, the structural strength of the blade body 100 can be evenly distributed along the longitudinal direction of the break groove 110.

Preferably, the other side of the blade body 100 can be selectively engraved with another plurality of breaking grooves 110 corresponding to the positions of the respective breaking grooves 110 described above to make the breaking groove 110 easier to use, but the invention is not limited thereto. Preferably, among the corresponding pairs of the fracture grooves 110 on the two sides of the blade body 100, the groove segments 111 are also disposed correspondingly. Therefore, the breakage of the two sides of the blade 100 can be made corresponding to ensure that the flange is flat.

In the replacement blade of the present invention, each of the fracture grooves 110 has a plurality of groove segments 111 to form a broken break groove 110. The blade body 100 still has considerable structural strength between the groove segments 111, so that the fracture groove 110 is not excessively fragile and is broken under unintended operation, so that in addition to the conventional metal blade, it can be applied to a hard and brittle texture. Ceramic replacement blade.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and other equivalent variations of the patent spirit of the present invention are all within the scope of the invention.

Claims (3)

A replacement blade includes a blade body having a long strip shape, the blade body being made of ceramic, one side of the blade body being engraved with a plurality of fracture grooves, each of the fracture grooves being a V-shaped groove, and each of the fracture grooves is respectively Extending across the two side edges of the blade body, each of the breaking slots includes a plurality of slot segments arranged in a line, and the slot segments of each of the breaking slots are spaced apart from each other along a longitudinal direction of each of the breaking slots, and one side of the blade body The edge is formed with a cutting edge, and the other side edge of the blade body is formed with a blade back relative to the cutting edge, and the depth of each of the breaking grooves is closer to the depth of the blade back, and each of the breaking grooves The depth of the groove section near the blade is shallower than the depth of the blade back, and the width of each of the fracture grooves near the blade edge is narrower than the width of the blade back, and each of the fracture grooves The width of the groove near the blade is narrower than the width of the blade. The replacement blade of claim 1, wherein the other side of the blade body is provided with another plurality of fracture grooves corresponding to the positions of the fracture grooves. The replacement blade of claim 1, wherein one end of the blade body forms a cutting edge, and the other end of the blade body defines a mounting hole.