Utility knife

Abstract

The invention discloses a utility knife, comprising a blade (1), a handle switch (2) and a knife shell (3), wherein the knife shell (3) has a knife groove (4) for the blade (1) to slide with; the knife shell (3) is provided with an opening (24) for the handle switch (2) to slide with; the blade (1) and the handle switch (2) are connected, the knife shell (3) is provided with a plurality of grooves (5), and the plurality of grooves (5) are arranged in two rows and are basically parallel; the handle switch (2) is provided with a first elastic buckle (6) and a second elastic buckle (7) on both sides, the first elastic buckle (6) can be embedded in one row of grooves (5); the second elastic buckle (7) can be embedded in another row of grooves (5); the handle switch (2) is provided with a locking and unlocking structure that can make the first elastic buckle (6) or the second elastic buckle (7) escape from the groove (5). The utility knife has low cost, high working reliability and high safety.

Description

Technical Field

[0001] The invention relates to the technical field of cutter tools, in particular to a utility knife. Background Art

[0002] A utility knife, also commonly known as a carving knife or wallpaper knife, is a knife used for art and handicrafts, mainly used to cut softer things.

[0003] The utility knife of the prior art includes a blade, a handle switch and a knife shell made of plastic. The knife shell has a knife groove, a metal knife sheath is arranged in the knife groove, the blade is connected to the handle switch, the blade slides in the metal knife sheath, and the knife shell and the metal knife sheath are provided with a handle groove for the handle switch and sliding. The handle switch has a metal spring controlled by the handle switch, which cooperates with a plurality of grooves on one side of the metal knife sheath to lock the position of the blade. When locked, the metal spring enters a groove, and when unlocked, the metal spring leaves a groove. When in use, first unlock the handle switch, push the handle switch forward to drive the blade to slide out of the knife shell, and lock the handle switch after the blade is extended into place for normal use. After use, unlock the handle switch again, push the handle switch backward to drive the blade to slide into the knife shell, and finally lock the handle switch again. The utility knife of the prior art has the following deficiencies in actual use: 1. The knife sheath increases the cost of the existing utility knife products; 2. If the metal knife sheath is not used, the above-mentioned usage method shows that the locking structure of the handle switch adopts single-sided locking and is used frequently, so long-term use causes great wear and tear on the plastic knife shell, making it possible for the metal spring piece to fall out of the groove when locked, thereby reducing reliability and safety.

[0004] In summary, there is an urgent need for a utility knife with low cost and high working reliability. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a utility knife with low cost, high working reliability and high safety.

[0006] The technical solution of the present invention is to provide a utility knife, including a blade, a handle switch and a knife shell, wherein the knife shell is provided with a knife groove for the blade to slide with; the knife shell is provided with an opening for the handle switch to slide with; the blade is connected to the handle switch, and the knife shell is provided with a plurality of grooves, and the plurality of grooves are arranged in two rows basically in parallel; a first elastic buckle and a second elastic buckle are respectively provided on both sides of the handle switch, and the first elastic buckle can be embedded in a row of grooves; the second elastic buckle can be embedded in another row of grooves; the handle switch is provided with a locking and unlocking structure that can make the first elastic buckle or the second elastic buckle escape from the groove.

[0007] The length direction line of the first elastic buckle is set at an acute angle with the line connecting the bottom of one row of grooves; the length direction line of the second elastic buckle is set at an acute angle with the line connecting the bottom of another row of grooves; the length direction line of the first elastic buckle is roughly parallel to the length direction line of the second elastic buckle.

[0008] The handle switch is provided with a locking and unlocking structure that can make the first elastic buckle or the second elastic buckle escape from the groove, which means that: the handle switch includes an upper slider and a lower slider, the lower slider is connected to the blade and slides in the blade groove and the opening, and the upper slider slides in the lower slider; the first elastic buckle and the second elastic buckle are arranged on the lower slider; the upper slider is provided with a push rod that can push the first elastic buckle and the second elastic buckle respectively.

[0009] The surfaces where the two push rods contact the first elastic buckle and the second elastic buckle are inclined surfaces.

[0010] The lower slider is provided with at least one upper sliding block, and the upper slider is provided with upper sliding grooves for the upper sliding blocks to slide; the upper slider is provided with at least one lower sliding block, and the lower slider is provided with lower sliding grooves for the lower sliding blocks to slide; the upper slider and the lower slider are detachably connected.

[0011] There are two upper sliding blocks and two upper sliding grooves, and the two upper sliding blocks are respectively arranged on the upper end of the first elastic buckle and the upper end of the second elastic buckle, and the two upper sliding grooves are respectively arranged on the lower surface of the upper sliding block opposite to the position of the two upper sliding blocks.

[0012] The detachable connection means: a first limit block is provided on one side of the lower sliding block, and a second limit block matching the first limit block is provided on one side of the lower sliding groove; the first limit block and / or the second limit block are elastic limit blocks; the first limit block and the second limit block are slidably matched.

[0013] There are two first limit blocks, which are respectively arranged on both sides of the lower sliding block; there are two second limit blocks, which are respectively arranged on both sides of the lower sliding groove; the two second limit blocks are respectively slidably matched with the two first limit blocks.

[0014] The front end portion of the first limiting block and / or the front end portion of the second limiting block is provided with an inclined surface for facilitating the mutual embedding of the first limiting block and the second limiting block.

[0015] There are two lower sliding blocks and two lower sliding grooves, the two lower sliding blocks are respectively arranged at the lower ends of the two push rods, and the two lower sliding grooves are respectively arranged on the upper surface of the lower sliding block opposite to the two lower sliding blocks.

[0016] After adopting the above structure, the present invention has the following advantages compared with the prior art:

[0017] 1. The utility knife of the present invention reduces the use of knife sheaths, thereby reducing the cost of existing utility knives. 2. The utility knife of the present invention uses two elastic buckles and grooves for use, which reduces the possibility of the buckles coming out of the grooves when locked, thereby improving reliability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility knife of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the knife shell body in the first position.

[0020] Figure 3 It is a schematic diagram of the structure of the knife shell body in the second position.

[0021] Figure 4 Exploded view of the utility knife of the present invention.

[0022] Figure 5 This is an exploded view of the upper slider and the lower slider in the first position.

[0023] Figure 6 This is an exploded view of the upper slider and the lower slider in the second position.

[0024] As shown in the figure, 1, blade, 2, handle switch, 3, knife housing, 4, knife groove, 5, groove, 6, first elastic buckle, 7, second elastic buckle, 8, upper slider, 9, lower slider, 10, push rod, 11, inclined surface, 12, upper sliding block, 13, upper slide groove, 14, lower sliding block, 15, lower slide groove, 16, first limit block, 17, second limit block, 18, inclined surface, 19, knife housing body, 20, tail cover, 21, connecting column, 22, entrance and exit, 23, hole, 24, opening. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figure 1 , Figure 2 As shown, the utility knife of the present invention is generally made of plastic except for the blade 1; it includes the blade 1, the handle switch 2 and the knife shell 3. In this embodiment, the knife shell 3 includes a knife shell body 19 and a tail cover 20; a knife groove 4 is provided in the knife shell body 19, and an entrance 22 of the blade 1 is provided at one end of the knife shell body 19 along the knife groove 4, and the other end of the knife shell body 19 along the knife groove 4 is connected to the tail cover 20 to prevent the blade 1 and the handle switch 2 from escaping from the knife shell 3.

[0027] The knife housing 3 has a knife groove 4 for the knife blade 1 to slide with; the knife housing 3 is provided with an opening 24 for the handle switch 2 to slide with; the knife blade 1 is connected to the handle switch 2, the tail end of the knife blade 1 has a hole 23, the front end of the handle switch has a connecting column 21, and the hole 23 is sleeved in the connecting column 21.

[0028] The knife housing 3 is provided with a plurality of grooves 5, and the plurality of grooves 5 are arranged in two basically parallel rows, namely a first row of grooves and a second row of grooves, and the bottom connecting line of the first row of grooves is basically parallel to the bottom connecting line of the second row of grooves; the handle switch 2 is provided with a first elastic buckle 6 and a second elastic buckle 7 on both sides, respectively, the first elastic buckle 6 can be embedded in a row of grooves 5, that is, the first elastic buckle 6 can be embedded in a groove 5 of the first row of grooves; the second elastic buckle 7 can be embedded in another row of grooves 5, that is, the second elastic buckle 7 can be embedded in a groove 5 of the second row of grooves; the handle switch 2 is provided with a locking and unlocking structure that can make the first elastic buckle 6 or the second elastic buckle 7 escape from the groove 5.

[0029] like Figure 3 As shown, the length direction line of the first elastic buckle 6 is set at an acute angle with the bottom line of the groove 5 in one row, which is the angle α shown in the figure; the length direction line of the second elastic buckle 7 is set at an acute angle with the bottom line of the groove 5 in another row, which is the angle β shown in the figure. The length direction line of the first elastic buckle 6 is roughly parallel to the length direction line of the second elastic buckle 7. In this embodiment, the head of the first elastic buckle 6 and the tail of the second elastic buckle 7 are wide and narrow, and the head is a protrusion of a triangular structure. It can be changed that the length direction of the first elastic buckle 6 or the second elastic buckle 7 can also be perpendicular to the bottom line of the groove 5, that is, the two are 90°.

[0030] like Figure 4 , Figure 5 , Figure 6 As shown, the handle switch 2 is provided with a locking and unlocking structure that can make the first elastic buckle 6 or the second elastic buckle 7 escape from the groove 5, which means: the handle switch 2 includes an upper slider 8 and a lower slider 9, the lower slider 9 is connected to the blade 1 and slides in the knife groove 4 and the opening 24, and the upper slider 8 slides in the lower slider 9; the first elastic buckle 6 and the second elastic buckle 7 are arranged on the lower slider 9, and can also be arranged on the upper slider 8. If they are arranged on the upper slider 8, the push rod is on the lower slider 9; the upper slider 8 is provided with a push rod 10 that can push the first elastic buckle 6 and the second elastic buckle 7 respectively.

[0031] The surfaces where the two push rods 10 contact the first elastic buckle 6 and the second elastic buckle 7 are inclined surfaces 11 , and the first elastic buckle 6 and the second elastic buckle 7 can be conveniently, smoothly and guidedly taken out of the groove 5 through the inclined surfaces 11 .

[0032] The lower slider 9 is provided with at least one upper sliding block 12, and the upper slider 8 is provided with upper sliding grooves 13 for the upper sliding blocks 12 to slide respectively; the upper slider 8 is provided with at least one lower sliding block 14, and the lower slider 9 is provided with lower sliding grooves 15 for the lower sliding blocks 14 to slide respectively; the upper slider 8 and the lower slider 9 are detachably connected.

[0033] There are two upper sliding blocks 12 and two upper sliding grooves 13, and the two upper sliding blocks 12 are respectively arranged on the upper end of the first elastic buckle 6 and the upper end of the second elastic buckle 7, and the two upper sliding grooves 13 are respectively arranged on the lower surface of the upper sliding block 8 opposite to the two upper sliding blocks 12.

[0034] The detachable connection means: a first limit block 16 is provided on one side of the lower sliding block 14, and a second limit block 17 matching the first limit block 16 is provided on one side of the lower sliding groove 15; the first limit block 16 and / or the second limit block 17 are elastic limit blocks; the first limit block 16 and the second limit block 17 are slidably matched.

[0035] There are two first limit blocks 16, which are respectively arranged on both sides of the lower sliding block 14; there are two second limit blocks 17, which are respectively arranged on both sides of the lower sliding groove 15; the two second limit blocks 17 are respectively slidably matched with the two first limit blocks 16.

[0036] An inclined surface 18 is provided on the front end of the first limiting block 16 or the front end of the second limiting block 17 to facilitate the mutual embedding of the first limiting block 16 and the second limiting block 17 .

[0037] There are two lower sliding blocks 14 and two lower sliding grooves 15 . The two lower sliding blocks 14 are respectively arranged at the lower ends of the two push rods 10 , and the two lower sliding grooves 15 are respectively arranged on the upper surface of the lower sliding block 9 opposite to the two lower sliding blocks 14 .

[0038] The working principle of the present invention is as follows: when the blade needs to be pushed out, the knife housing body 19 is held by hand and the upper slider 8 is pushed forward. At this time, the first elastic buckle 6 is naturally disengaged from the groove 5 due to the thrust, and the second elastic buckle 7 cannot be naturally disengaged from the groove 5, and is forcibly pushed out and slid forward by the push rod 10 located behind the upper slider 8. When the sliding stops, the first elastic buckle 6 can prevent the blade 1 from sliding in, and the second elastic buckle 7 can prevent the blade 1 from sliding out, forming a lock. After use, the knife housing body 19 is held by hand and the upper slider 8 is pushed backward. At this time, the second elastic buckle 7 is naturally disengaged from the groove 5 due to the thrust, and the first elastic buckle 6 cannot be naturally disengaged from the groove 5, and is forcibly pushed out and slid backward by the push rod 10 located in front of the upper slider 8.

[0039] The above description is only for the best embodiment of the present invention, which should not be understood as limiting the claims. All changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A utility knife, comprising a blade (1), a handle switch (2) and a knife housing (3), wherein the knife housing (3) has a knife groove (4) for the blade (1) to slide with; the knife housing (3) has an opening (24) for the handle switch (2) to slide with; the blade (1) and the handle switch (2) are connected, Features: The knife housing (3) is provided with a plurality of grooves (5), and the plurality of grooves (5) are arranged in two rows substantially in parallel; a first elastic buckle (6) and a second elastic buckle (7) are respectively provided on both sides of the handle switch (2), and the first elastic buckle (6) can be embedded in the grooves (5) of one row; the second elastic buckle (7) can be embedded in the grooves (5) of another row; and a locking and unlocking structure is provided in the handle switch (2) for enabling the first elastic buckle (6) or the second elastic buckle (7) to escape from the groove (5); The handle switch (2) is provided with a locking and unlocking structure capable of allowing the first elastic buckle (6) or the second elastic buckle (7) to escape from the groove (5), which means that: the handle switch (2) comprises an upper slider (8) and a lower slider (9), the lower slider (9) is connected to the blade (1) and is slidably fitted in the blade groove (4) and the opening (24), and the upper slider (8) is slidably fitted in the lower slider (9); the first elastic buckle (6) and the second elastic buckle (7) are arranged on the lower slider (9); and the upper slider (8) is provided with a push rod (10) capable of pushing the first elastic buckle (6) and the second elastic buckle (7) respectively.

2. The utility knife according to claim 1, Features: The length direction line of the first elastic buckle (6) is arranged at an acute angle with a line connecting the bottoms of one row of grooves (5); the length direction line of the second elastic buckle (7) is arranged at an acute angle with a line connecting the bottoms of another row of grooves (5); the length direction line of the first elastic buckle (6) is substantially parallel to the length direction line of the second elastic buckle (7).

3. The utility knife according to claim 1, Features: The surfaces where the two push rods (10) contact the first elastic buckle (6) and the second elastic buckle (7) are inclined surfaces (11).

4. The utility knife according to claim 1, Features: The lower slider (9) is provided with at least one upper sliding block (12), and the upper slider (8) is provided with upper sliding grooves (13) for the upper sliding blocks (12) to slide; the upper slider (8) is provided with at least one lower sliding block (14), and the lower slider (9) is provided with lower sliding grooves (15) for the lower sliding blocks (14) to slide; the upper slider (8) and the lower slider (9) are detachably connected.

5. The utility knife according to claim 4, Features: There are two upper sliding blocks (12) and two upper sliding grooves (13), and the two upper sliding blocks (12) are respectively arranged on the upper end of the first elastic buckle (6) and the upper end of the second elastic buckle (7), and the two upper sliding grooves (13) are respectively arranged on the lower surface of the upper sliding block (8) opposite to the position of the two upper sliding blocks (12).

6. The utility knife according to claim 4, Features: The detachable connection means that: a first limit block (16) is provided on one side of the lower sliding block (14), and a second limit block (17) matching the first limit block (16) is provided on one side of the lower sliding groove (15); the first limit block (16) and / or the second limit block (17) are elastic limit blocks; and the first limit block (16) and the second limit block (17) are slidably matched.

7. The utility knife according to claim 6, Features: There are two first limit blocks (16), and the two first limit blocks (16) are respectively arranged on both sides of the lower sliding block (14); there are two second limit blocks (17), and the two second limit blocks (17) are respectively arranged on both sides of the lower sliding groove (15); the two second limit blocks (17) are respectively slidably matched with the two first limit blocks (16).

8. The utility knife according to claim 6, Features: An inclined surface (18) is provided on the front end of the first limiting block (16) and / or the front end of the second limiting block (17) for facilitating the mutual embedding of the first limiting block (16) and the second limiting block (17).

9. The utility knife according to claim 6, Features: There are two lower sliding blocks (14) and two lower sliding grooves (15), respectively. The two lower sliding blocks (14) are respectively arranged at the lower ends of the two push rods (10), and the two lower sliding grooves (15) are respectively arranged on the upper surface of the lower sliding block (9) opposite to the position of the two lower sliding blocks (14).

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