CN114454218A

CN114454218A - Art designing knife

Info

Publication number: CN114454218A
Application number: CN202210014046.3A
Authority: CN
Inventors: 王奎; 吴潇雄
Original assignee: Deli Group Co Ltd
Current assignee: Deli Group Co Ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-05-10

Abstract

The invention provides an art knife which comprises a protective shell, a blade and a sliding block, wherein the sliding block is slidably arranged in the protective shell, the blade is arranged on the sliding block, a lifting gear shaft is arranged on the sliding block, the gear shaft can drive the sliding block to drive the blade to slide, a gear is arranged on the gear shaft, a rack is arranged on the protective shell, the gear is limited above the sliding block and is meshed with the rack, a first limiting structure and a second limiting structure are arranged on the gear shaft, the first limiting structure is used for being in contact with the gear and limiting the gear in the circumferential direction, and the second limiting structure is used for being in contact with the sliding block and enabling the sliding block to limit the gear in the circumferential direction; after the gear shaft rises, the first limiting structure and the second limiting structure can be simultaneously contacted with the gear and the sliding block respectively; after the gear shaft descends, the first limiting structure can be separated from the gear, so that the gear can rotate around the gear shaft. The utility knife can adjust the length of the knife body extending out of the protective shell in an electrodeless way, and is silent in the adjusting process and convenient to operate.

Description

Art designing knife

Technical Field

The invention relates to the technical field of manual cutting tools, in particular to an art knife.

Background

In the prior art, the blade of the art knife is mostly an inclined opening, the blade body is provided with a plurality of lineation parallel to the knife edge, if the knife edge becomes blunt or collapses, the nearby lineation can be broken off to generate a new knife edge, and the blade body of the art knife is also shortened; the blade of the utility knife is also very fragile, and the blade cannot be too long when in use, otherwise the blade is easy to break. In order to enable the utility knife with different knife body lengths to be normally used, the utility knife is generally arranged in a protective shell, and the knife body is pushed out of the protective shell by a proper length and is locked and kept when in use, so that the length of the knife body in use is the length extending out of the protective shell, and the length can be adjusted at will.

Among the prior art, the mode of locking blade has and sets up draw-in groove and buckle respectively on the connecting piece of protective housing and blade, makes buckle and draw-in groove cooperation be connected through pressing down or pass, and the draw-in groove generally can set up a plurality of, makes the buckle be connected with the draw-in groove of difference and can adjust the length that the blade stretches out the protective housing, and this kind of mode receives the restriction that the draw-in groove set up the position, can't accomplish electrodeless regulation, and can send out attack sound when buckle and draw-in groove cooperation are connected, and is not the silence regulation. In addition, the cutter body is locked through thread locking, namely, after the length of the cutter body extending out of the protective shell is adjusted, the cutter body is tightly pressed by a screw or a stud, although the method can realize stepless adjustment and is basically silent, the cutter blade needs to be locked and loosened by rotating the thread before and after the utility knife is used every time, which is really troublesome and not popular with users.

Disclosure of Invention

The invention aims to solve the technical problem of providing an art knife which can steplessly adjust the length of a knife body extending out of a protective shell, is silent in adjustment process and is very convenient to lock the knife body.

The technical scheme includes that the utility knife comprises a protective shell, a blade and a sliding block, wherein the sliding block is slidably arranged in the protective shell, the blade is arranged on the sliding block, a liftable gear shaft is arranged on the sliding block, the gear shaft can drive the sliding block to drive the blade to slide, a gear is arranged on the gear shaft, a rack is arranged on the protective shell, the gear is limited above the sliding block and is meshed with the rack, a first limiting structure and a second limiting structure are arranged on the gear shaft, the first limiting structure is used for contacting with the gear and limiting the gear in the circumferential direction, and the second limiting structure is used for contacting with the sliding block and limiting the gear shaft in the circumferential direction; after the gear shaft rises, the first limiting structure and the second limiting structure can be simultaneously contacted with the gear and the sliding block respectively; after the gear shaft descends, the first limiting structure can be separated from the gear, so that the gear can rotate around the gear shaft.

Compared with the prior art, the utility knife has the following advantages: the length of the cutter body extending out of the protective shell can be adjusted steplessly, the gear shaft is lowered, the first limiting structure is prevented from contacting with the gear, the sliding block can be driven to drive the blade to slide by pushing the gear shaft, the gear rotates around the gear shaft and is always meshed with the rack in the process, and the adjusting process is silent; after the length that the blade stretches out the protective housing is adjusted, make the gear shaft rise to first limit structure and second limit structure simultaneously respectively with gear and slider contact, then the slider is spacing to gear shaft circumference, the gear shaft is spacing to gear circumference, the gear can not rotate, because rack to gear meshing makes the gear by rack locking position, owing to connect spacing relation, the gear shaft, the slider, the blade is all locked the position, so, the length that the blade stretches out the protective housing is locked, it is very convenient to operate.

Preferably, an elastic part is arranged between the gear shaft and the sliding block, the gear shaft descends to enable the elastic part to be compressed, and the elastic part can push the gear shaft to ascend until the first limiting structure and the second limiting structure are simultaneously contacted with the gear and the sliding block respectively. By adopting the structure, the sliding block can be driven to drive the blade to slide by pressing down the gear shaft and pushing the gear shaft, the length of the protective shell extending out of the blade body can be adjusted steplessly, and the length of the protective shell extending out of the blade body can be rebounded and locked by the elastic piece by loosening the gear shaft, so that the operation is very convenient.

Preferably, the first limiting structure is a limiting key arranged on the outer side wall of the gear shaft, a limiting key groove capable of being matched with the limiting key is formed in the inner side wall of the gear, the gear shaft ascends to enable the limiting key to be inserted into the limiting key groove, and the gear shaft descends to enable the limiting key to be withdrawn from the limiting key groove. By adopting the structure, the first limiting structure can be conveniently contacted with or separated from the gear.

Preferably, be provided with the gear installed part of liftable on the slider, the gear shaft sets up to integral type structure with the gear installed part, and second limit structure is the inserted block of setting on the gear installed part, be provided with on the slider with the spacing slot of inserted block complex, the inserted block is pegged graft in the spacing slot that corresponds and is spacing by spacing slot circumference, when the gear installed part goes up and down, the inserted block reciprocates along the cell wall of the spacing slot that corresponds. By adopting the structure, the sliding block is circumferentially limited to the gear mounting part all the time, namely, the gear shaft is circumferentially limited, so that the gear shaft can only synchronously slide with the sliding block and can not rotate, and the gear is circumferentially limited when the first limiting structure is contacted with the gear.

Preferably, the slider is provided with a limiting block, the gear mounting piece is limited below the limiting block, the gear shaft upwards penetrates through the limiting block and can be lifted, and the limiting block is used for supporting the gear to enable the gear to be limited above the limiting block. By adopting the structure, the limit block and the gear shaft can be prevented from being separated from the installation position in the lifting process, the lifting height of the gear shaft is limited, and the position of the lower bottom surface of the gear is also limited.

Preferably, an elastic piece is arranged between the gear mounting piece and the sliding block, and structures for mounting the elastic piece are arranged at opposite positions of the gear mounting piece and the sliding block. By adopting the structure, the telescopic stroke and range of the elastic piece can be limited, and the elastic piece is prevented from jumping out of the installation position to fail.

Preferably, a bushing is arranged in the protective shell, a sliding groove is formed in the bushing, the sliding block is slidably arranged in the sliding groove, the upper end of the gear shaft extends out of the sliding groove, and the rack is located on the side portion of the sliding groove. By adopting the structure, the bushing and the protective shell are independently arranged, the structural complexity of a single part is reduced, the rack is arranged on the bushing, the bushing can be made of metal materials in order to ensure the strength of the rack, and the protective shell can be made of general plastics, so that the material cost is saved.

Preferably, one end of the bushing is provided with a blocking part and a knife outlet, the sliding block drives the blade to slide so that the blade extends out of the knife outlet, and the blocking part is used for limiting the sliding block. By adopting the structure, the maximum length of the blade extending out of the knife edge can be limited, and the sliding block and the blade are prevented from being separated from the sliding groove of the bushing.

Preferably, the upper side of the inner part of the protective shell is provided with a gear limiting surface, and the gear is limited between the gear limiting surface and the sliding block. By adopting the structure, the gear shaft is prevented from driving the gear to be separated from the rack in the lifting process.

Preferably, the second limit structure is a bayonet arranged on the gear shaft, the slider is provided with a buckle head detachably matched with the buckle, the gear shaft rises to enable the bayonet to be connected with the buckle head in a buckling mode, and the gear shaft descends to enable the bayonet to be separated from the buckle head. By adopting the structure, the bayonet can be connected with the buckle head in a buckling manner only by pulling up the gear shaft, the sliding block circumferentially limits the gear shaft, the gear shaft circumferentially limits the gear through the first limiting structure, the gear cannot rotate and is locked by the rack, and the gear shaft, the sliding block and the blade are locked at the locked positions due to the connection limiting relationship, so that the length of the cutter body extending out of the protective shell is locked; as long as press the gear shaft, just can make the bayonet socket break away from the discount, the slider can not be spacing to gear shaft circumference, and the gear can rotate with the rack meshing, promotes the gear shaft and just can drive the slider and drive the blade and slide, and the length that the protective housing was stretched out to electrodeless regulation blade, and the operation is very convenient.

Drawings

Fig. 1 is a schematic structural view of the utility knife of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a sectional view taken along the line a-a of fig. 2.

Fig. 4 is a sectional view taken along the direction B-B of fig. 2.

Fig. 5 is an exploded view of the utility knife of the present invention.

Fig. 6 is an exploded view of the mounting and matching structure of the gear mounting member and the sliding block in the utility knife of the present invention.

As shown in the figure: 1. the gear limiting device comprises a protective shell, 1-1 parts of gear limiting surfaces, 2 parts of bushings, 2-1 parts of sliding grooves, 2-2 parts of racks, 2-3 parts of blocking parts, 2-4 parts of knife outlets, 3 parts of blades, 4 parts of sliding blocks, 4-1 parts of limiting slots, 4-2 parts of spring grooves, 5 parts of gear mounting parts, 5-1 parts of inserting blocks, 5-2 parts of spring convex columns, 5-3 parts of gear shafts, 5-31 parts of limiting keys, 5-4 parts of shaft caps, 6 parts of limiting blocks, 7 parts of gears, 7-1 parts of limiting key grooves, 8 parts of springs.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

Example 1:

as shown in fig. 1 to 6, the utility knife of the present invention comprises a protective case 1, a bushing 2, a sliding block 4, a blade 3, a gear mounting member 5, a limiting block 6 and a gear 7, wherein the bushing 2 is arranged in the protective case 1, a sliding groove 2-1 is arranged in the bushing 2, a rack 2-2 is arranged on one side portion of the sliding groove 2-1 along the length direction, the sliding block 4 is slidably arranged in the sliding groove 2-1, the blade 3 is arranged on the sliding block 4, one end of the bushing 2 on the sliding groove 2-1 is provided with a blocking portion 2-3 and a knife-out edge 2-4, the sliding block 4 drives the blade 3 to slide so that the blade 3 extends out of the knife-out edge 2-4, when the sliding block 4 moves to be in contact with the blocking part 2-3, the blocking part 2-3 limits the sliding block 4, and the length of the blade 3 extending out of the knife edge 2-4 is the largest.

The gear mounting piece 5 is integrally provided with a gear shaft 5-3 and four L-shaped insert blocks 5-1, the gear shaft 5-3 is located on the upper side of the gear mounting piece 5, the insert blocks 5-1 are located on the lower side of the gear mounting piece 5, the sliding block 4 is provided with four L-shaped limiting slots 4-1 matched with the insert blocks 5-1, the insert blocks 5-1 are inserted into the corresponding limiting slots 4-1 and are circumferentially limited by the limiting slots 4-1, and the insert blocks 5-1 are second limiting structures for circumferentially limiting the gear mounting piece 5 by the sliding block 4, so that the gear mounting piece 5 is mounted on the sliding block 4, the gear mounting piece 5 can lift on the sliding block 4, and when the gear mounting piece 5 lifts, the insert blocks 5-1 move up and down along the groove walls of the corresponding limiting slots 4-1.

The limiting block 6 is arranged on the sliding block 4, the gear mounting piece 5 is limited below the limiting block 6, the gear shaft 5-3 upwards penetrates through the limiting block 6 and extends out of the sliding groove 2-1, and when the gear mounting piece 5 goes up and down, the gear shaft 5-3 goes up and down relative to the limiting block 6. The gear mounting piece 5 is provided with spring convex columns 5-2 in the middle of the four insertion blocks 5-1, correspondingly, the sliding block 4 is provided with spring grooves 4-2 in the positions opposite to the spring convex columns 5-2, the spring convex columns 5-2 and the spring grooves 4-2 are used for mounting elastic pieces between the gear mounting piece 5 and the sliding block 4, two ends of a spring 8 are limited on the spring convex columns 5-2 and in the spring grooves 4-2 respectively, the gear mounting piece 5 descends to compress the spring 8, and the spring 8 rebounds to enable the gear mounting piece 5 to ascend and reset.

The gear 7 is sleeved on the gear shaft 5-3, the limiting block 6 supports the gear 7, the gear limiting surface 1-1 is arranged on the upper side inside the protective shell 1, the gear 7 is limited between the gear limiting surface 1-1 and the limiting block 6, and the tooth surface of the gear 7 is meshed with the rack 2-2. The outer side wall of the gear shaft 5-3 is provided with a limit key 5-31, the limit key 5-31 is a plurality of triangular keys in the embodiment, the inner side wall of the gear 7 is provided with a limit key groove 7-1 matched with the limit key 5-31, and the limit key groove 7-1 is a plurality of triangular grooves in the embodiment. When the gear shaft 5-3 ascends, the limit key 5-31 can ascend and be inserted into the limit key groove 7-1, at the moment, the gear shaft 5-3 limits the gear 7 circumferentially, and the limit key 5-31 is a first limit structure for limiting the gear 7 circumferentially by the gear shaft 5-3; when the gear shaft 5-3 descends, the limit key 5-31 can descend and exit the limit key groove 7-1, and at the moment, the gear 7 can rotate around the gear shaft 5-3.

The end part of the gear shaft 5-3 extending out of the chute 2-1 is provided with a shaft cap 5-4, the shaft cap 5-4 is pressed down to enable the limit key 5-31 to exit from the limit key groove 7-1, at the moment, the shaft cap 5-4 can be pushed to move along the chute 2-1, the gear mounting part 5 where the gear shaft 5-3 is located, the limit block 6 and the sliding block 4 and the blade 3 move along the chute 2-1 together, and therefore the length of the blade 3 extending out of the knife edge 2-4 can be adjusted in a stepless mode; when the shaft cap 5-4 is loosened, the spring 8 rebounds to enable the gear mounting piece 5 and the gear shaft 5-3 on the gear mounting piece to ascend, the limiting key 5-31 is inserted into the limiting key groove 7-1, the gear shaft 5-3 is circumferentially limited at the moment, the gear 7 cannot rotate as the sliding block 4 is circumferentially limited on the gear mounting piece 5, namely the gear shaft 5-3, and the gear 7 is meshed with the rack 2-2, the gear 7 is locked by the rack 2-2 at the moment, and the gear shaft 5-3, namely the gear mounting piece 5, the sliding block 4 and the blade 3 are locked at the positions due to the connection limiting relation, so that the length of the blade 3 extending out of the knife edge 2-4 is locked, and the operation is very convenient.

Example 2:

the difference between the utility knife of this embodiment and embodiment 1 is that the slider 4 is different from the second limiting structure for limiting the circumferential direction of the gear mounting member 5, in this embodiment, the gear mounting member 5 is provided with a bayonet, the slider 4 is provided with a buckle head detachably engaged with the buckle, the gear mounting member 5 is lifted by pulling the shaft cap 5-4 upwards, so that the bayonet is connected with the buckle head buckle, the slider 4 is limited to the circumferential direction of the gear mounting member 5, and the gear mounting member 5 is lowered by pressing the shaft cap 5-4, so that the bayonet is separated from the buckle head, and the slider 4 cannot limit the circumferential direction of the gear mounting member 5.

Since the gear mount 5 is integrally formed with the gear shaft 5-3, it can be understood that the elevation of the gear mount 5, i.e., the elevation of the gear shaft 5-3, is circumferentially limited, i.e., the gear shaft 5-3 is circumferentially limited.

The above are merely specific examples of the present invention, and are not intended to limit the scope of the invention; it is intended that the following claims be interpreted as including all such alterations, modifications, and equivalents as fall within the true spirit and scope of the invention.

Claims

1. An art knife comprises a protective shell (1), a blade (3) and a sliding block (4), wherein the sliding block (4) is slidably arranged in the protective shell (1), and the blade (3) is arranged on the sliding block (4), and the art knife is characterized in that a liftable gear shaft is arranged on the sliding block (4), the gear shaft can drive the sliding block (4) to drive the blade (3) to slide, a gear (7) is arranged on the gear shaft, a rack is arranged on the protective shell (1), the gear (7) is limited above the sliding block (4) and meshed with the rack, a first limiting structure and a second limiting structure are arranged on the gear shaft, the first limiting structure is used for contacting with the gear (7) and circumferentially limiting the gear (7), and the second limiting structure is used for contacting with the sliding block (4) and circumferentially limiting the gear shaft by the sliding block (4); after the gear shaft rises, the first limiting structure and the second limiting structure can be simultaneously and respectively contacted with the gear (7) and the sliding block (4); after the gear shaft descends, the first limiting structure can be separated from the gear (7) to enable the gear (7) to rotate around the gear shaft.

2. The utility knife according to claim 1, characterized in that an elastic member is arranged between the gear shaft and the slider (4), the gear shaft descends to compress the elastic member, and the elastic member rebounds to push the gear shaft to ascend until the first limit structure and the second limit structure simultaneously contact with the gear (7) and the slider (4), respectively.

3. The utility knife according to claim 1, wherein the first limiting structure is a limiting key disposed on the outer side wall of the gear shaft, a limiting key groove (7-1) capable of being engaged with the limiting key is disposed on the inner side wall of the gear (7), the gear shaft is raised to enable the limiting key to be inserted into the limiting key groove (7-1), and the gear shaft is lowered to enable the limiting key to be withdrawn from the limiting key groove (7-1).

4. The utility knife according to claim 1, characterized in that the slider (4) is provided with a liftable gear mounting member (5), the gear shaft and the gear mounting member (5) are arranged in an integral structure, the second limiting structure is an insert block (5-1) arranged on the gear mounting member (5), the slider (4) is provided with a limiting slot (4-1) matched with the insert block (5-1), the insert block (5-1) is inserted into the corresponding limiting slot (4-1) and is circumferentially limited by the limiting slot (4-1), and when the gear mounting member (5) is lifted, the insert block (5-1) moves up and down along the slot wall of the corresponding limiting slot (4-1).

5. The utility knife according to claim 4, characterized in that the slider (4) is provided with a stopper (6), the gear mounting member (5) is limited below the stopper (6), the gear shaft passes through the stopper (6) in an upward direction and can be lifted, and the stopper (6) is used for supporting the gear (7) so that the gear (7) is limited above the stopper (6).

6. The utility knife according to claim 5, characterized in that an elastic member is arranged between the gear mounting member (5) and the slider (4), and the opposite positions of the gear mounting member (5) and the slider (4) are provided with structures for mounting the elastic member.

7. The utility knife according to claim 1, characterized in that a bushing (2) is arranged in the protective casing (1), a sliding groove (2-1) is arranged in the bushing (2), the sliding block (4) is slidably arranged in the sliding groove (2-1), the upper end of the gear shaft extends out of the sliding groove (2-1), and the rack is arranged at the side part of the sliding groove (2-1).

8. The utility knife according to claim 7, characterized in that one end of the bushing (2) is provided with a stop (2-3) and an exit edge (2-4), the sliding block (4) drives the blade (3) to slide so that the blade (3) extends out of the exit edge (2-4), and the stop (2-3) is used for limiting the sliding block (4).

9. The utility knife according to claim 1, characterized in that the upper side inside the protective shell (1) is provided with a gear limiting surface (1-1), and the gear (7) is limited between the gear limiting surface (1-1) and the slider (4).

10. The utility knife according to claim 1, wherein the second limiting structure is a bayonet arranged on the gear shaft, the slider (4) is provided with a buckle head detachably matched with the buckle, the gear shaft ascends to enable the bayonet to be connected with the buckle head in a buckling manner, and the gear shaft descends to enable the bayonet to be separated from the buckle head.