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Utility knife with replaceable blade

A utility knife and blade technology, applied in the field of hand tools, can solve problems such as blade falling off and user injury

Active Publication Date: 2015-09-30
宁波奉化巨星工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, even if the blade and the knife holder are in the storage state, such as being carried in the user's pocket, if the switching assembly is accidentally touched, it may cause the locking device to be in an unlocked state, and the blade may fall off from the knife holder and become sharp. blades are likely to cause injury to the user, such as Figure 7 shown
This security risk may have serious consequences and should be avoided as much as possible

Method used

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  • Utility knife with replaceable blade
  • Utility knife with replaceable blade
  • Utility knife with replaceable blade

Examples

Experimental program
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Embodiment Construction

[0078] As mentioned above, the purpose of the present invention is to provide a safe utility knife with replaceable blades, which is achieved by adding a limiting device to the existing utility knife with replaceable blades. The limiting device is configured to prevent the blade from falling off from the knife holder when the knife holder is received into the handle and the locking device is in an unlocked state.

[0079] exist Figure 8 In an embodiment according to the present invention shown, 100 is a folding utility knife with a replaceable blade, and the limiting device at this time is a protrusion 106 a extending from the inner side of the handle 109 . The blade 105 is fixed on the knife holder 107 by a locking device, and when the knife holder 107 is folded into the knife handle 109 , the end 1051 of the blade 105 is in close proximity to the raised portion 106a. When the switching assembly 101 is accidentally touched to cause the locking device to be in the unlocked s...

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Abstract

The present invention first provides a utility knife with a replaceable blade, comprising a knife handle, a blade holder, a blade and a locking device that locks the blade in the blade holder. The blade holder and the blade are enabled to switch between a first position and a second position. When the blade holder and the blade are in the first position, the blade is used for cutting operation, and when the blade holder and the blade are in the second position, both the blade holder and the blade are received in the knife handle. The utility knife further includes a restriction means which is thus arranged as, when the blade holder is in the second position and the locking device is in unlocked state, the restriction means is used for preventing the detachment of the blade from the blade holder by confining the movement of the blade relative to the blade holder. The present invention also provides a folding utility knife with a replaceable blade and a retractable utility knife with a replaceable blade, and a utility knife with multiple tools and replaceable blades.

Description

technical field [0001] The invention relates to a utility knife with a replaceable blade, in particular to a safety utility knife capable of preventing the blade from falling off accidentally, and belongs to the field of hand tools. Background technique [0002] Foldable and telescopic utility knives with replaceable blades are currently widely used because of their quick blade replacement and easy portability. [0003] A folding utility knife with a replaceable blade usually includes a knife holder that can be folded into a handle, a blade fixed on the knife holder, and a locking device for fixing the blade on the knife. When the blade needs to be replaced, the knife holder is first unfolded, and then the locking device is set to an unlocked state, and the blade can be pulled out from the knife holder for replacement. [0004] In the prior art, there is also a foldable utility knife with a back-lock structure with replaceable blades. This back-lock structure usually includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B26B5/00B26B1/02B26B1/08
CPCB26B5/00B26B1/042
Inventor 王伟毅
Owner 宁波奉化巨星工具有限公司
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