TWI755185B - Utility knife - Google Patents

Abstract

A utility knife is provided, including: a housing, defining an operation compartment and a storage compartment; a blade holder, movably received within the operation compartment; a blade storing carrier, movably received within the storage compartment, including a receiving portion and a grip portion which are connected with each other, the grip portion being protrusive out of the housing; and a locking mechanism, including a base body, a movable member, a first engaging member and a second engaging member, the base body being disposed to the housing, the movable member being attached to the base body, the first engaging member being disposed on and movable with the movable member, the second engaging member being disposed on the blade storing carrier, one of the first engaging member and the second engaging member including a slot, the other of the first engaging member and the second engaging member including a projection which is releasably engaged within the slot.

Description

utility knife

The present invention is related to utility knives.

Utility knife, also known as utility knife, multi-purpose knife, utility knife, its shape is suitable for one-handed grasping, and is often used to cut thin materials, such as cutting paper, cutting tape, cutting fabric, etc., commonly used in processing factories , warehouse, such as Taiwan Patents I309197, M478597, US Patents US2007074402A1, US2003037444A1, the disclosed utility knives belong to this category.

However, the above-mentioned utility knives used to store spare blades are all lacking in actual use. For example, the tool magazine seat of Taiwan Patent I309197 is used in a pivoting way, and the hooking point is often too small. The trouble that the fingers cannot be hooked out and unscrewed smoothly; the tool magazine seat of Taiwan patent I309197 is combined with the shell by a tight fit, and there is often a lack of unexpected drop or wear and tear that cannot be firmly combined; the US patent US2003037444A1 has various openings However, there are problems that the screw cover is easy to be opened by accident, and the screwed blade is easy to fall.

Therefore, it is necessary to provide a novel and progressive utility knife to solve the above problems.

The main purpose of the present invention is to provide a utility knife, which can be locked by a locking mechanism, so that the tool magazine seat can be surely combined with the casing to store spare blades, and the operation of taking out the tool magazine seat and putting it back into the casing is very convenient, and it can be Meet the needs of rapid use.

In order to achieve the above object, the present invention provides a practical knife, comprising: a casing, a knife seat, a knife magazine seat and a locking mechanism. The shell encloses a working chamber and a storage chamber; the tool holder is accommodated in the working chamber in a linearly movable manner for positioning a working blade; the tool magazine seat can be inserted into the storage chamber in a linearly movable manner, A storage part and an extraction part connected to each other are included, the storage part is used to store at least one spare blade, and the extraction part protrudes from the casing for external clamping operation; the locking mechanism includes a base body, a moving part component, a first latching portion and a second latching portion, the base body is set on the housing, the moving piece is set on the base body and can be relatively moved in a locking position and a releasing position, the first latching portion The second latching portion is set on the tool magazine base, and one of the first latching portion and the second latching portion is a latching slot, and the other is a latching slot. a latching protrusion releasably engages with the card slot; wherein, when the moving member is located at the locking position so that the latching protrusion is engaged with the card groove, the tool magazine seat cannot move away from the housing, and When the moving piece is located at the release position so that the locking protrusion is disengaged from the locking groove, the tool magazine seat can move away from the housing; wherein, the moving piece is slidably sleeved on the base body, and the sliding of the moving piece The direction is transverse to the extraction direction of the tool magazine seat and transverse to the moving direction of the tool seat; wherein, the locking mechanism further includes an elastic piece, which is arranged between the housing and the moving piece to drive The moving piece normally has a tendency to move toward the locking position; wherein, the latching protrusion is barb-shaped and has a first inclined surface, and the outer groove wall of the latching slot is provided with a second inclined surface facing the first inclined surface. The sloping part, the notch direction of the card slot is the same as the sliding direction of the moving part, when the tool magazine seat is inserted into the storage chamber from the outside and moves close to the base, the first sloping part and the second sloping part sliding against each other to drive the moving member to move toward the release position, and when the tool magazine seat moves to a predetermined position, the first inclined portion is separated from the second On the inclined surface, the latching protrusion is inserted into the notch of the latching groove and then hooks the tool magazine seat.

1: Shell

11: Studio

12: Storage room

13: Arc recess

2: knife holder

21: Deformation Department

211: Positioning Department

212: Touch Department

3: Tool magazine seat

31: Extraction Department

311: Groove

32: Storage Department

33: Plug section

34: Card slot

35: Second slope

36: Pressing part

37: Groove

4: Lock and release mechanism

41: Matrix

42: Moving parts

43: Body

44: Arm

45: Insertion space

46: Card convex

47: The first oblique part

48: Elastic

49: connecting claw

51: push button

52: Tool change button

6: The first direction

71: Working Blade

72: Spare Blade

FIG. 1 and FIG. 2 are perspective views of an embodiment of the present invention from different viewing angles.

FIG. 3 is an exploded view of an embodiment of the present invention.

FIG. 4 and FIG. 5 are perspective views of a tool magazine seat from different perspectives according to an embodiment of the present invention.

FIG. 6 is a partial enlarged view of an embodiment of the present invention.

FIG. 7 and FIG. 8 are sectional views of the action of the locking and releasing mechanism according to an embodiment of the present invention.

9 to 10 are schematic diagrams of the movement of the tool holder according to an embodiment of the present invention.

11 to 12 are schematic diagrams of the operation of the tool change button according to an embodiment of the present invention.

The following examples only illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention, and are described together first.

Please refer to FIG. 1 to FIG. 12 , which show an embodiment of the present invention. The utility knife of the present invention includes: a casing 1 , a knife seat 2 , a knife magazine seat 3 and a locking mechanism 4 .

The housing 1 encloses a working chamber 11 and a storage chamber 12 , the tool holder 2 can be accommodated in the working chamber 11 in a linearly movable manner for positioning a working blade 71 , and the tool magazine seat 3 can be linearly moved. It is 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 to accommodate at least one spare blade 72 , and the extraction portion 31 protrudes from the housing 1 for storage. External gripping operation. More specifically, the locking mechanism 4 includes a base body 41 , a moving member 42 , a first latching portion and a The second latching portion, the base body 41 is disposed on the housing 1 , the moving member 42 is disposed on the base body 41 and can relatively move in a locking position and a releasing position, the first latching portion is disposed on the moving member 42 A co-moving relationship is formed, the second latching portion is disposed on the tool magazine base 3, one of the first latching portion and the second latching portion is a latching slot 34, and the other is compatible with the card The slot 34 is releasably engaged with one of the latching protrusions 46; wherein, when the moving member 42 is in the locking position to engage the latching protrusion 46 into the latching groove 34, the tool magazine seat 3 cannot move out of the housing When the moving member 42 is in the release position to disengage the latching protrusion 46 from the latching slot 34 , the tool magazine seat 3 can be moved away from the housing 1 .

Preferably, the locking and releasing mechanism 4 further includes an elastic member 48, and the elastic member 48 is arranged between the housing 1 and the moving member 42 to drive the moving member 42 to normally move toward the locking position. , so that the tool magazine seat 3 can reliably resist the action of unexpected external force and normally remain in the locked position.

In this embodiment, the first latching portion is the latching protrusion 46 , the second latching portion is the latching slot 34 , the latching protrusion 46 is barb-shaped and has a first inclined surface 47 . A second inclined surface 35 facing the first inclined surface 47 is provided on the outer groove wall of the card slot 34. When the tool magazine seat 3 is inserted into the storage chamber 12 from the outside and moves toward the base 41, the first inclined surface The sliding portion 47 and the second inclined portion 35 slide against each other to drive the moving member 42 to move toward the release position, and cooperate with the action of the elastic member 48 to return to achieve the effect of automatic locking. Specifically, when the tool magazine When the seat 3 moves to a predetermined position, the first inclined surface 47 is separated from the second inclined surface 35 , and the latching protrusion 46 is inserted into the notch of the latching slot 34 to hook the tool magazine base 3 . In addition, the moving member 42 is slidably sleeved on the base body 41 , and the sliding direction of the moving member 42 is transverse to the extraction direction of the tool magazine base 3 and transverse to the moving direction of the tool base 2 .

More specifically, the moving member 42 further includes a sleeve 43 and two arms 44 , the sleeve 43 is sleeved on the base 41 , one end of the two arms 44 is connected to the sleeve 43 at intervals, and the two The other end of the arm portion 44 is sandwiched and connected to the latching projection 46 , and the two arm portions 44 and the latching projection 46 together define an insertion space 45. In addition, the two connecting claws 49 of the moving member 42 are connected to a push button 51 through the casing 1, and the two connecting claws 49 are connected to the sleeve 43. The push button 51 is for external operation and pressing, and can be pressed by pressing Quick release. In addition, the tool magazine base 3 further includes an inserting section 33 , the inserting section 33 and the extracting portion 31 are located at opposite ends of the tool magazine base 3 , the card slot 34 penetrates the inserting section 33 , and the The second inclined surface 35 is provided on the side of the plug-in segment 33 facing away from the extraction portion 31 , and the plug-in segment 33 can be selectively inserted into the insertion space 45 so that the card protrusion 46 can be locked into the card slot 34 ; Among them, the insertion and connection of the insertion space 45 and the insertion section 33 can improve the combination accuracy, and has the function of guiding the insertion direction to prevent fools.

More specifically, the storage portion 32 is located at the end of the tool magazine base 3 away from the extraction portion 31 , the insertion section 33 protrudes out of the storage portion 32 , and the storage portion 32 faces away from the extraction portion 31 . One side is open and has a recessed insertion slot 37. When the insertion section 33 is inserted into the insertion space 45, an arm portion 44 is inserted into the insertion slot 37 and extends into the storage portion 32 for stopping. By positioning the at least one spare blade 72 , the placement stability of the at least one spare blade 72 and the stability of the blade holder 2 being inserted into the housing 1 can be simultaneously improved.

Preferably, the tool magazine base 3 further includes 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 be firmly positioned by a large margin. The at least one spare blade 72 has a better effect of simultaneous movement. In this embodiment, the pressing portion 36 is a sheet body with elastic deformability, so as to facilitate insertion or extraction of the at least one spare blade 72 .

Preferably, at least one groove 311 is provided in the extracting portion 31, and the at least one groove 311 is for the fingers to extend into and drive the extracting portion 31 to move by hooking. In this embodiment, the at least one groove 311 is The number of the grooves 311 is two, and the two grooves 311 are respectively disposed on two opposite sides of the extraction portion 31 .

More preferably, the housing 1 further includes 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 communicates with the groove 311 to further provide Space margin for fingers.

The utility knife further includes a tool change button 52 , the tool change button 52 is disposed on the housing 1 movably along a first direction 6 , and the tool holder 2 includes a deformation portion 21 , and the deformation portion 21 can move along the first direction 6 . Elastically deformed in one direction 6 , the deformation portion 21 is provided with a positioning portion 211 and a triggering portion 212 . It can be understood that the tool holder 2 can move to a predetermined position along the first direction 6 transversely. When the tool holder 2 is located at the predetermined position, the trigger portion 212 is located on the moving path of the tool change button 52 . The tool change button 52 is pushed against the trigger portion 212 by external operation to drive the deformation portion 21 to deform, and then the positioning portion 211 is disengaged to release the working blade 71 . At this time, the user can pull out the working blade 71 for replacement or turning.

11: Studio

12: Storage room

2: knife holder

21: Deformation Department

211: Positioning Department

212: Touch Department

3: Tool magazine seat

41: Matrix

42: Moving parts

48: Elastic

51: push button

52: Tool change button

71: Working Blade

72: Spare Blade

Claims (7)

A utility knife, comprising: a casing enclosing a working room and a storage room; a knife seat, which can be accommodated in the working chamber in a linearly movable manner, for positioning a working blade; a knife magazine seat, which can be inserted in a linear movable manner Connected to the storage chamber, it includes a connected storage part and an extraction part, the storage part is used for accommodating at least one spare blade, the extraction part protrudes from the casing for external clamping operation; and a lock The release mechanism includes a base body, a moving piece, a first latching part and a second latching part, the base body is set on the casing, the moving part is set on the base body and can move relatively between a locking position and a second latching part. In the release position, the first abutting portion is disposed on the moving member to form a co-moving relationship, the second abutting portion is disposed on the tool magazine seat, and one of the first and second abutting portions is a One card slot, the other is a card protrusion that can be releasably engaged with the card groove; wherein, when the moving member is located at the locking position to engage the card protrusion into the card groove, the tool magazine The seat cannot be moved away from the housing, and when the moving piece is located at the release position to disengage the locking protrusion from the locking groove, the tool magazine seat can be moved away from the housing; wherein the moving piece is slidably sleeved On the base body, the sliding direction of the moving piece is transverse to the extraction direction of the tool magazine seat and transverse to the moving direction of the tool seat; wherein, the locking mechanism further includes an elastic piece, and the elastic piece is arranged on the housing and the moving piece, so as to drive the moving piece to normally move toward the locking position; wherein, the latching protrusion is in the shape of a barb and is provided with a first inclined surface, and the outer groove wall of the latching slot is provided with a surface facing the locking position. The first inclined surface is a second inclined surface, and the notch direction of the card slot is equal to the sliding direction of the moving piece. When the tool magazine seat is inserted into the storage chamber from the outside and moves toward the base body, the first a bevel with the second The inclined parts slide against each other to drive the moving member to move toward the release position, and when the tool magazine seat moves to a predetermined position, the first inclined part is separated from the second inclined part, and the locking protrusion is inserted into the groove of the locking groove The opening is then hooked to the tool changer seat. The utility knife according to claim 1, wherein the extraction part is provided with at least one groove, and the at least one groove is inserted by the fingers to drive the extraction part to move in the manner of hooking. The utility knife according to claim 2, wherein the housing further comprises an arc recess, the arc recess direction of the arc recess is transverse to the recess direction of the groove, and the arc recess communicates with the recess. The utility knife according to claim 1, further comprising a tool change button, the tool change button is provided on the housing so as to be movable along a first direction, the tool seat includes a deformation portion, and the deformation portion can move along the first direction. Elastic deformation in one direction, the deformation part is provided with a positioning part and a triggering part, the positioning part is used for inserting and positioning the working blade, and the triggering part is used for crossing the working blade; the blade seat can move along the transverse first direction to a a predetermined position, when the tool seat is located at the predetermined position, the trigger part is located on the moving path of the tool change button, the tool change button is pushed against the trigger part by an external operation to drive the deformation part to deform, and then the positioning part is disengaged Release the working blade. The utility knife according to any one of claims 1 to 4, wherein the tool magazine seat 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 . The utility knife according to claim 5, wherein the pressing portion is a sheet body with elastic deformability. The utility knife as claimed in claim 1, wherein 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 seat; and the extraction portion is provided with at least one recess. a groove, the at least one groove is for the fingers to extend into to drive the extraction part to move in a hooking manner; the casing further includes an arc concave part, and the arc notch direction of the arc concave part is transverse to the notch direction of the groove, and the arc The concave part communicates with the groove; the utility knife further includes a tool change button, the tool change button can be moved along a first direction on the housing, the tool seat includes a deformation part, the deformation part can move along the first direction Elastic deformation in the direction, the deformation part is provided with a positioning part and a triggering part, the positioning part is used for inserting and positioning the working blade, the triggering part is used for crossing the working blade; the tool seat can be moved along the transverse first direction to a predetermined When the tool seat is located at the predetermined position, the trigger part is located on the moving path of the tool change button, the tool change button is pushed against the trigger part by an external operation to drive the deformation part to deform, and then the positioning part is released from the release the working blade; the tool magazine seat further includes a pressing part, a part of the pressing part extends into the storage part for pressing and positioning the at least one spare blade; the pressing part is a piece with elastic deformation ability body; the two connecting claws of the moving piece pass through the casing and connect to a push button, the two connecting claws are connected to the sleeve body, and the push button is used for external operation and pressing; the first latching portion is the latching protrusion, The second latching portion is the latching slot; the moving member further includes a body and two arms, the sleeve is sleeved on the base, one end of the two arms is connected to the sleeve at intervals, and the two The other end of the arm portion is clamped and connected to the latching projection, the two arm portions and the latching projection together form an inserting space, the tool magazine seat further includes an inserting segment, and the inserting segment and the extracting portion are located in the inserting space. The two opposite ends of the tool magazine seat, the card slot runs through the plug-in section, the side of the plug-in section facing away from the extraction part is provided with the second inclined surface, and the plug-in section can be selectively inserted into the plug-in section A space is provided so that the card protrusion is locked into the card slot; the storage part is located at the end of the tool magazine seat away from the extraction part, the plug-in section protrudes out of the storage part, and the storage part faces away from the storage part One side of the extraction portion is open and has a recessed insertion slot. When the insertion section is inserted into the insertion space, an arm portion is inserted into the insertion slot and extends into the storage portion for stopping and limiting the at least one A spare blade; the number of the at least one groove is two, and the two grooves are respectively arranged on two opposite sides of the extraction part.

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