A utility knife

Abstract

The utility model belongs to the technical field of knives, and particularly relates to a utility knife. A utility knife comprises a shell, a blade arranged in the shell, a locking block that can slide and lock in the blade, a blade arranged on the locking block, and a push button arranged on the locking block. A guard plate is slidably penetrated in the inner cavity of the blade along the length direction of the blade, and the guard plate is a bent structure facing the back of the blade, and the back of the blade can be slidably penetrated in the bent cavity of the guard plate; a slide plate is fixedly connected to the guard plate, and a push block is arranged on the slide plate; the push block can push the guard plate out of the shell. The utility model can protect the blade through the guard plate when the blade cuts an object to avoid its twisting and breaking, and the length of the guard plate extending can be adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutter tools, in particular to an art knife. Background Art

[0002] Existing utility knives, such as the Chinese invention patent application with application number 201911266874.0, disclose a utility knife, including a blade, a handle switch and a knife shell, wherein the knife shell has 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, which are arranged in two rows and are basically parallel; the handle switch is provided with a first elastic buckle and a second elastic buckle on both sides, respectively, 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. The utility knife has low cost, high working reliability and high safety.

[0003] The existing utility knives have the following technical problems: when the blade needs to be used to cut a harder object, when the blade is extended for a long time, the blade tends to shake, twist, or even break. Especially when the object needs to be cut by percussion, since most existing utility knives are not provided with a blade protection structure, the blade is more likely to break, which is not only unsafe to use, but also causes material loss. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art, the present application provides a utility knife which can protect the blade through a guard plate when the blade cuts objects and the extension length of the guard plate can be adjusted.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A utility knife comprises an outer shell, a blade core arranged in the outer shell, a locking block which can slide and lock in the blade core, a blade arranged on the locking block, and a push button arranged on the locking block. A guard plate is slidably inserted into the inner cavity of the blade core along the length direction of the blade, the guard plate is a bent structure facing the back of the blade, and the back of the blade can slide into the bent cavity of the guard plate; a slide plate is fixedly connected to the guard plate, and a push block is arranged on the slide plate; the push block can push the guard plate out of the outer shell.

[0007] Preferably, the slide plate can be slidably inserted into the blade and is arranged on a side of the locking block away from the blade, and the push block is clamped on the slide plate.

[0008] Preferably, a plurality of locking grooves are provided on the blade along its length direction, and a locking spring piece is fixedly mounted on the slide plate. When the push block is pushed, the locking spring piece can be disengaged from a locking groove and mounted in another locking groove.

[0009] Preferably, the locking spring piece includes a transverse spring piece fixedly clamped on the slide plate along the length direction of the blade, a first bent spring piece bent toward the inner side of the slide plate on both sides of the transverse spring piece, and a second bent spring piece bent toward the inner side of the slide plate at one end of the first bent spring piece away from the transverse spring piece; the bent portion formed by the first bent spring piece and the second bent spring piece can be clamped in the locking groove.

[0010] Preferably, the push block is clamped on the upper part of the slide plate, two guide strips are fixedly connected to the lower end surface of the push block, a slide plate through groove is opened on the slide plate, and the guide strips are passed through the slide plate through groove; a push block clamping groove is opened on the lower end surface of the push block, and the bent portion can be clamped in the push block clamping groove.

[0011] Preferably, a connecting plate is fixedly connected to one end of the guard plate, and the connecting plate is fixedly clamped on the slide plate.

[0012] Preferably, a locking spring piece is fixedly mounted on the locking block, and a bent portion of the locking spring piece arranged on the locking block can be mounted in the locking groove.

[0013] Preferably, a connecting column is fixedly connected to the locking block, and the blade can be sleeved on the connecting column.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model can adjust the corresponding extension length of the guard plate according to the extension length of the blade by arranging the slide plate, the push block and the guard plate, and can make the back of the blade pass through the guard plate. Therefore, when the blade is cutting, due to the protection of the guard plate, the force stability of the blade is enhanced, thereby effectively avoiding the blade, shaking, twisting and breaking. In addition, the objects can be cut by percussion to ensure the safety of use. In addition, by arranging a locking spring sheet and making the bent part of the locking spring sheet stuck in the locking groove, the slide plate can be fixed at a certain position in the blade when the push block is pushed to avoid the guard plate from sliding. In addition, the product of the utility model is flexible and convenient to use and operate, and the production cost is also very low, which is worthy of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model when in use.

[0017] Figure 2 It is a schematic diagram of the structure of the utility model when not in use.

[0018] Figure 3 It is a schematic diagram of the explosion structure of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the shell of the utility model.

[0020] Figure 5 It is a schematic diagram of the connection structure between the locking block and the locking spring piece of the utility model.

[0021] Figure 6 The utility model is a schematic diagram of the connection structure of the push block, the slide plate, the blade and the guard plate.

[0022] Figure 7 It is a schematic diagram of the connection structure between the push block and the locking spring piece of the utility model.

[0023] Figure 8 It is a structural schematic diagram of the skateboard of the utility model.

[0024] Fig. 9 It is a structural schematic diagram of the guard plate of the utility model.

[0025] In the figure: 1, housing, 11, mounting groove, 12, blocking block, 2, blade, 21, locking groove, 3, locking block, 31, connecting column, 32, locking block through groove, 4, blade, 5, push key, 6, guard plate, 61, connecting plate, 7, slide plate, 71, connecting groove, 72, card plate, 721, card setting part, 73, limit plate, 74, slide plate through groove, 8, push block, 81, push block groove, 82, push block card slot, 83, guide strip, 9, locking spring piece, 91, transverse spring piece, 92, first bending spring piece, 93, second bending spring piece, 94, bending part, DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0028] See attached Figure 1 , 2 As shown in Figures 3 and 4, a utility knife comprises a shell 1, a mounting groove 11 is provided in the shell 1, a blade 2 is fixedly embedded in the mounting groove 11 in the shell 1, and the blade 2 can be an existing blade structure with a hollow interior and an open upper end. A locking block 3 is slidable in the blade 2 and can be locked at a certain position in the blade 2. A connecting column 31 is fixedly connected to the locking block 3, and a blade 4 can be sleeved on the connecting column 31. A push button 5 is provided on the locking block 3, and when the push button 5 is pushed, the locking block 3 can be pushed and the blade 4 can be extended and retracted in the blade 2. In addition, in order to facilitate the replacement of the blade 4, a blocking block 12 is detachably fixedly embedded at one end of the shell 1. When the blocking block 12 is removed, the locking block 3 can be taken out from the inner liner 2 to replace the blade.

[0029] It should be noted that the related structure of the locking block 3 of the utility knife for locking and unlocking the utility knife in the inner liner 2 can be selected from the prior art, such as the related structure of the locking block 3 involved in the utility model used in the invention patent application with application number 202311439804.7 and patent name "A Stepless Adjustment Utility Knife". Of course, other structures can also be used, which will be specifically described in the embodiments of this specification.

[0030] See also Figure 6 , 9 As shown, a guard plate 6 is slidably penetrated in the inner cavity of the blade 2 along the length direction of the blade 4. The guard plate 6 is a bent structure facing the back of the blade 4. The back of the blade 4 can be slidably penetrated in the bent cavity of the guard plate 6. In this embodiment, the guard plate 6 is a "U"-shaped structure. In order to facilitate the pushing of the guard plate 6, a slide plate 7 is fixedly connected to the guard plate 6, and a push block 8 is arranged on the slide plate 7. The push block 8 can push the guard plate 6 out of the shell 1. There are multiple connection modes between the push block 8 and the slide plate 7, and between the slide plate 7 and the guard plate 6. As long as the slide plate 7 can be pushed by the push block 8 to drive the guard plate 8 to slide out and slide into the blade 2, a slide groove is provided on the blade 2 and the shell 1 opposite to the back of the blade 4, and the slide plate 7 is slidably arranged in the slide groove, and the push block 8 is arranged on the slide plate 7 outside the slide groove. Specifically, in this embodiment, for the sake of simple structure and convenient operation, the utility model adopts the following structure. The slide plate 7 can be slidably inserted into the blade 2 and is arranged on a side of the locking block 3 away from the blade 4. The push block 8 is clamped on the slide plate 7. A connecting plate 61 is integrally formed and fixedly connected with one end of the guard plate 6. A connecting groove 71 is opened on the slide plate 7, and the connecting plate 61 is fixedly clamped in the connecting groove 71 on the slide plate 7.

[0031] See also Figure 5 , 6As shown in FIGS. 7 and 8 , a plurality of locking grooves 21 are provided at the upper opening of the blade 2 along its length direction, and a locking spring piece 9 is fixedly provided on the slide plate 7. When the push block 8 is pushed, the locking spring piece 9 can be disengaged from a locking groove 21 and be fixed in another locking groove 21.

[0032] Specifically, two opposite U-shaped clamping plates 72 are fixedly connected to the upper end surface of the slide plate 7, and the upper end surfaces of the slide plate 7 inside the two clamping plates 72 are fixedly connected to the limiting plates 73 respectively. A locking spring piece 9 is clamped between the clamping plate 72 and the limiting plate 73. The locking spring piece 9 includes a transverse spring piece 91 fixedly clamped between the clamping plate 72 and the limiting plate 73 along the length direction of the blade 4, a first bent spring piece 92 bent toward the middle of the inner side of the slide plate 7 on both sides of the transverse spring piece 91, and a second bent spring piece 93 bent toward the inner side of the slide plate 7 at one end of the first bent spring piece 92 away from the transverse spring piece 91. The bent portion 94 composed of the first bent spring piece 92 and the second bent spring piece 93 can be clamped in the locking groove 21.

[0033] Furthermore, in order to facilitate the clamping of the push block 8 on the slide plate 7, a clamping portion 721 is extended toward the outside of the upper end surfaces of the two clamping plates 72, and an inverted "convex" shaped push block groove 81 is opened along its length on the lower end surface of the push block 8, and the clamping portion 721 can be clamped in the push block groove 81.

[0034] Further, in order to facilitate pushing the slide plate 7, in this embodiment, a push block slot 82 is provided on the lower end surface of the push block 8 at the edge of the push block groove 81, and the bent portion 94 can be stuck in the push block slot 82. Two guide bars 83 are integrally formed and fixedly connected to the top of the push block groove 81, and a slide plate through groove 74 is provided on the slide plate 7. The guide bars 83 are inserted into the slide plate through groove 74, and the outer side surfaces of the two guide bars 83 are respectively abutted against the groove wall of the corresponding slide plate through groove 74. The groove wall of the push block slot 82 can be a slope structure, that is, when the push block 8 is pressed down, the bent portion 94 slides with the slide plate through groove 74 and makes the first bent spring piece 92 move toward its inner side, so that the bent portion 94 is separated from the locking groove 21 to a certain extent, so as to facilitate pushing the slide plate 7. When the push block 8 is released, due to the elastic force of the first bent spring piece 92, the push block 8 rises to the initial position.

[0035] In order to simplify the overall structure of the utility model, the locking block 3 is also provided with a clamping plate 72, a clamping portion 721, a limiting plate 73, a locking spring piece 9 and a corresponding locking block through groove 32, and the structure of the push button 5 is the same as that of the push block 8. Correspondingly, when the push button 5 is pressed down, the first bent spring piece 92 on the locking block 3 moves inwardly, so that the bent portion 94 is separated from the locking groove 21 to a certain extent, so as to push the locking block 3, thereby adjusting the relative position of the blade 4 in the blade 2. When the push button 5 is released, due to the elastic force of the first bent spring piece 92, the push button 5 rises to the initial position.

[0036] The working process of the embodiment of the utility model is as follows:

[0037] When the utility knife of the utility model is not in use, Figure 2 As shown, at this time, the blade 4 and the guard plate 6 are completely retracted into the blade 2; when it is necessary to extend a longer blade 4 for cutting or cutting a harder object or for percussion cutting, press the push button 5 and push the locking block 3 forward to allow the blade 4 to extend to an appropriate length. When the push button 5 is released, the bent portion 94 on the locking block 3 is stuck in the corresponding locking groove 21, thereby fixing the position of the locking block 3 and the blade 4. Thereafter, press the push block 8 and push the slide plate 7 forward to allow the guard plate 6 to extend to an appropriate length. When the push block 8 is released, the bent portion 94 on the slide plate 7 is stuck in the corresponding locking groove 21, thereby fixing the position of the slide plate 7 and the guard plate 6. At this time, the guard plate 6 can wrap the upper part and the back of the blade 4 to prevent the blade 4 from shaking, twisting, or breaking.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A utility knife, comprising a housing, a blade arranged in the housing, a locking block slidable and lockable in the blade, a blade arranged on the locking block, and a push button arranged on the locking block, characterized in that: A guard plate is slidably provided in the inner cavity of the blade along the length direction of the blade, the guard plate is a bent structure facing the back of the blade, and the back of the blade can be slidably provided in the bent cavity of the guard plate; A slide plate is fixedly connected to the guard plate, and a push block is arranged on the slide plate; the push block can push the guard plate out of the shell.

2. A utility knife according to claim 1, characterized in that: The slide plate can be slidably arranged in the blade and is arranged on a side of the locking block away from the blade, and the pushing block is clamped on the slide plate.

3. A utility knife according to claim 2, characterized in that: A plurality of locking grooves are provided on the blade along its length direction, and a locking spring piece is fixedly clamped on the slide plate. When the push block is pushed, the locking spring piece can be disengaged from a locking groove and clamped in another locking groove.

4. A utility knife according to claim 3, characterized in that: The locking spring piece includes a transverse spring piece fixedly clamped on the slide plate along the length direction of the blade, a first bent spring piece bent toward the inner side of the slide plate on both sides of the transverse spring piece, and a second bent spring piece bent toward the inner side of the slide plate at one end of the first bent spring piece away from the transverse spring piece. The bent portion formed by the first bent spring piece and the second bent spring piece can be clamped in the locking groove.

5. A utility knife according to claim 4, characterized in that: The push block is clamped on the upper part of the slide plate, two guide bars are fixedly connected to the lower end surface of the push block, a slide plate through groove is opened on the slide plate, and the guide bars are inserted into the slide plate through groove; a push block clamping groove is opened on the lower end surface of the push block, and the bent part can be clamped in the push block clamping groove.

6. The utility knife according to claim 1, characterized in that: A connecting plate is fixedly connected to one end of the guard plate, and the connecting plate is fixedly clamped on the slide plate.

7. The utility knife according to claim 4, characterized in that: A locking spring piece is fixedly mounted on the locking block, and a bent portion of the locking spring piece arranged on the locking block can be mounted in the locking groove.

8. The utility knife according to claim 1, characterized in that: A connecting column is fixedly connected to the locking block, and the blade can be sleeved on the connecting column.

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