The present invention discloses a plate-type utility knife comprising a blade carrier, a blade structure and a cover plate, wherein, the blade structure is mounted on the front part of the blade carrier, between the blade carrier and the cover plate, the cover plate makes the blade structure fixed on the blade carrier. The blade carrier includes a main blade carrier plate and a front blade carrier plate, the front blade carrier plate is located in front of the main blade carrier plate, a vacancy that contains the blade structure is arranged on the front side of the main blade carrier plate, the blade structure is arranged in the vacancy, a space for containing the cover plate is arranged on the front side of the front blade carrier plate, the cover plate is mounted in the space. The blade carrier includes a back blade carrier plate, the main blade carrier plate is located between the front blade carrier plate and the back blade carrier plate.

The present invention publishes a knife with a replaceable blade, comprising a housing, a cover arranged on the housing and a blade carrier arranged between the housing and the cover, characterized in that, a blade which can move between an extended position and a retracted position is installed on the blade carrier, and a blade cartridge carrier is arrange around the periphery of a position adjacent to the retracted position of the blade, the blade cartridge carrier is provided with an internal space of a blade shape to place spare blades. Wherein, the cover can be connected with the housing in an open type to fix the blade carrier between the cover and the housing.

A utility knife is provided, including: a housing, including first and second compartments; a blade holder, movably received within the first compartment; a blade storing carrier, detachably inserted in the second compartment, including a receiving portion for receiving at least one spare blade; an elastic unit, disposed between the housing and the blade storing carrier; and a locking mechanism, including a base body disposed to the housing, a movable member attached to the base body and movable between locking and release positions, a first engaging member disposed on the movable member and a second engaging member disposed on the receiving portion and releasably engagable with the first engaging member, when the is second engaging member is disengaged from the second engaging member, the elastic unit biases the receiving portion to eject the blade storing carrier.

A cutter apparatus includes a housing with a blade carrier configured for holding a blade, and a handle coupled to the housing via an engagement interface configured to allow a user of the cutter apparatus to selectively interfit together the housing and the handle in multiple different cutter apparatus configurations, wherein the engagement interface includes a coupler configured to permit the housing and the handle to be repositioned further apart in a housing/handle reconfiguring mode in which the coupler permits the handle to be rotatably repositioned in relation to the housing or vice versa while substantially limiting longitudinal movement of the housing relative to the handle.

A utility knife comprises a housing (1), a blade carrier (2), a blade (3), a position control component (4) and a safety control component (5); a positioning direction (B) is defined at an angle to the sliding direction (A) of the position control component (4), the first blocking position (141) is farther away from the positioning portion (42) of the position control component (4) than the rest areas of the slide rail (13) except the first blocking position (14). In this way, in addition to blocking position shift, the position control component can also be used for contact-fitting with the blade carrier to determine whether the blade carrier can slide forward independently. Therefore, the utility knife has fewer components, resulting in low material cost, fewer assembly steps, convenient and time-saving assembly process, and the components are not easy to lose.

A utility knife constructed of a lower shell (102), an upper shell (104), a retaining knob (106) and a hinge pin (108). The hinge pin (110) provides a high-strength connection between lower shell (102) and upper shell (104). Retaining magnets (110) and (112) retain steel utility blades in place when shells (102) and (104) are separated from one another. According to one embodiment, the retaining magnets (110) and (112) are permanent magnets made of an alloy of neodymium, iron and boron.

A box top opener employs a trapezoidal ceramic blade having a cutting edge which is positionable at multiple positions. A knob is rotatable to extend and retract the blade. A guide projects from a front of the cutter body to provide a guide surface engageable against the top of a box. In one embodiment, a blade carrier has a follower which traverses a spiral track for displacing the blade.

A utility instrument is in the form of a cutting tool suitable for fitting onto a user's finger. The tool has a blade and a sheath, both coupled to a mounting structure. The blade and sheath are pivotable with respect to each other. A user can wear the tool on a finger about a finger joint. The user can bend the finger to set the tool to an open condition to expose the blade for use, and can stretching the finger to set the tool to a closed condition to safely shade the blade using the sheath. The tool may further have a housing for fully receiving the blade. The blade may extend out of the housing for use, and may be retracted into the housing for safety.

A utility knife has a housing in which a particle flow cross section is substantially constant or increases in a flow direction of particles from an inlet of the housing into an interior of the housing at an end of the housing to an outlet of the housing. A blade assembly has a blade with a cutting edge and is movable relative to the housing between a stowed position and an operating position for a cutting operation. A first actuating part and a second actuating part mounted movable relative to the first actuating part move of the blade assembly between the stowed and operating positions. First and second slotted links form a four-point linkage with the first and second actuating parts.

A cutting device is disclosed. The cutting device has a housing, a cutting assembly that is movably disposed in the housing, the cutting assembly including a body member, an actuating member, and a first urging member that is configured to urge the actuating member away from the body member, from an inner position toward an outer position relative to the body member, by applying a first urging force, and a second urging member that is configured to urge the cutting assembly to retract within the housing by applying a second urging force that urges the actuating member to move from an extended position toward a retracted position relative to the housing. The housing includes at least one recess.