Blade chuck and tool knife

Abstract

The utility model discloses a blade chuck and a tool knife. Wherein the blade chuck comprises a chuck main body and a positioning piece; the head opening of the chuck body is provided with a first clamping groove capable of vertically clamping a blade and a second clamping groove capable of transversely clamping the blade, and the crossed parts of the first clamping groove and the second clamping groove are overlapped. The positioning piece comprises a positioning locking block arranged in the chuck body, one end of the positioning locking block extends to the overlapped portion between the first clamping groove and the second clamping groove to be matched with the blade, and the positioning locking block can move in a reciprocating mode in the vertical direction of the first clamping groove and the second clamping groove so as to lock or unlock the blade. The utility model provides a novel blade chuck which is provided with a bidirectional blade clamping groove, can meet the requirements of vertical installation and transverse installation of a blade, can be used as a cutting knife to realize a cutting function when the blade is vertically installed, and can be used as a scraper knife to realize a shoveling and scraping function when the blade is transversely installed, so that a traditional art knife has the function of the scraper knife through different installation modes; the device can be applied to various use conditions.

Description

Technical Field

[0001] The utility model relates to a utility knife, in particular to a blade chuck and a utility knife including such a blade chuck. Background Art

[0002] As a relatively commonly used utility knife, the utility knife is widely used because of its small size, convenient use and portability. At present, the utility knife blade is vertically installed through a one-way blade insertion groove, and the blade is clamped by a retractable bump. When removing the blade, it is necessary to press the bump button downward or lift the card slot button upward. However, such a utility knife can only be vertically inserted to realize the cutting function, and the function is relatively single.

[0003] To solve the above problems, the utility model with the publication number CN 218534633 U in the prior art discloses a trapezoidal utility knife with cutting, shoveling and scraping functions. The blade of this structure can be installed horizontally and vertically. When the blade is installed vertically, it is used as a cutter. When the blade is installed horizontally, it is used as a shovel. The blade drives the clamping mechanism to move and then rotate through a connecting rod to realize a 90° angle switch, achieving the purpose of "one knife with two uses". However, the number of internal parts of this tool is large and the structure is complex. Not only the failure rate is high and the cost is high, but also the thickness of the tool head is relatively large, with a large gap from the thickness of the traditional utility knife. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a blade chuck and a utility knife including such a blade chuck with reasonable design, simplified structure and convenient use.

[0005] To solve the above technical problems, the technical solution of the utility model is: a blade chuck for installing a blade, including:

[0006] A chuck body, the head of the chuck body is open and provided with a first clamping groove for vertically clamping the blade and a second clamping groove for horizontally clamping the blade, and the overlapping part of the cross section of the first clamping groove and the second clamping groove overlaps;

[0007] A positioning member, installed on the chuck body, including a positioning lock block arranged in the chuck body, one end of the positioning lock block extends to the overlapping part between the first clamping groove and the second clamping groove to cooperate with the blade, and the positioning lock block can reciprocate along the vertical direction of the first clamping groove and the second clamping groove to lock or unlock the blade.

[0008] As a preferred technical solution, the first clamping groove is a trapezoidal groove adapted to the shape of one side tip of the blade, the second clamping groove is a rectangular groove adapted to the rear end of the blade, and the trapezoidal groove and the rectangular groove are arranged in a cross-over and overlapping manner.

[0009] As a preferred technical solution, a lock block groove is provided in the chuck body, the positioning lock block can slide along the inner wall of the lock block groove, and one end of the positioning lock block passes through the lock block groove and cooperates with the blade.

[0010] As a preferred technical solution, the positioning member further includes an unlocking lever for driving the positioning lock block to move vertically. The positioning lock block is provided at one end of the unlocking lever, and the other end of the unlocking lever extends outside the chuck body and is provided with a pressing end.

[0011] As a preferred technical solution, a lock rod groove for accommodating the unlocking lever is provided in the chuck body. The lock rod groove is arranged in parallel with the first clamping groove and the second clamping groove. When the pressing end of the unlocking lever is pressed, the other end of the unlocking lever drives the positioning lock block to move away from the first clamping groove and the second clamping groove.

[0012] As a preferred technical solution, an unlocking retreat inclined groove is provided on the surface of the inner side of the lock rod groove away from the positioning lock block. The unlocking retreat inclined groove gradually expands the space from the outside to the inside. An unlocking pressing inclined groove is provided on the surface of the outside of the lock rod groove close to the positioning lock block. The unlocking pressing inclined groove gradually expands the space from the inside to the outside.

[0013] As a preferred technical solution, the chuck body includes a chuck seat plate, a chuck middle plate and a chuck cover plate that are correspondingly buckled. The first clamping groove and the second clamping groove are arranged between the chuck seat plate and the chuck middle plate. The positioning member is arranged between the chuck middle plate and the chuck cover plate. The positioning lock block is slidably arranged on the chuck middle plate, and one end thereof passes through the chuck middle plate and extends to the overlapping part between the first clamping groove and the second clamping groove.

[0014] As a preferred technical solution, the other end of the positioning lock block extends outside the chuck body, and a spring pressing piece for pressing the outer surface of the positioning lock block is provided on the chuck body.

[0015] As a preferred technical solution, the blade includes a blade body in a trapezoidal shape, and a positioning card slot or a positioning card hole for cooperating with the positioning lock block is provided in the middle of the blade body.

[0016] Another preferred technical solution, a tool knife, includes a knife body. The end of the knife body is provided with the above-mentioned blade chuck, and the blade is horizontally installed in the first clamping groove of the blade chuck or vertically installed in the second clamping groove of the blade chuck.

[0017] Due to the adoption of the above technical scheme, the beneficial effects of the utility model are as follows: the utility model provides a new type of blade chuck with a two-way blade clamping groove, which can meet the needs of vertical and horizontal installation of the blade. When installed vertically, it can be used as a cutting knife to realize the cutting function, and when installed horizontally, it can be used as a scraping knife to realize the scraping function. Through different installation forms, the traditional utility knife has the function of a scraping knife and can be applied to various working conditions; at the same time, the device can lock and unlock the blade by moving the positioning locking block, and has the advantages of a small number of parts, a simplified structure, easy operation, a low failure rate, and a low cost. At the same time, the thickness of the knife body can be significantly reduced, which is close to the thickness of the blade head of a traditional utility knife, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0019] Figure 1 This is a schematic structural diagram of a blade chuck according to an embodiment of the utility model;

[0020] Figure 2 The structure of the blade chuck of the utility model embodiment is split Figure 1 ;

[0021] Figure 3 The structure of the blade chuck of the utility model embodiment is split Figure 2 ;

[0022] Figure 4 It is a schematic diagram of a blade vertically installed in an embodiment of the utility model;

[0023] Figure 5 It is a schematic diagram of a blade installed horizontally in an embodiment of the utility model;

[0024] Figure 6 This is a partial structural schematic diagram of the locking block slot of the utility model embodiment;

[0025] Figure 7 This is another partial structural schematic diagram of the locking block slot of the embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the locking state of the positioning lock block of the embodiment of the utility model;

[0027] Figure 9 This is a schematic diagram of the unlocked state of the positioning lock block in the embodiment of the utility model;

[0028] Figure 10 It is a structural schematic diagram of another embodiment of the blade chuck of the utility model;

[0029] In the figure: 100 - blade chuck; 110 - chuck body; 111 - first clamping groove; 112 - second clamping groove; 113 - chuck seat plate; 114 - middle chuck plate; 115 - chuck cover plate; 120 - positioning member; 121 - positioning lock block; 122 - unlocking lever; 123 - pressing end; 124 - lock block groove; 125 - lock rod groove; 126 - unlocking retraction inclined groove; 127 - unlocking pressing inclined groove; 128 - spring pressing piece; 200 - blade. Specific embodiments

[0030] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present utility model are described by way of illustration. Undoubtedly, those of ordinary skill in the art can recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the drawings and description are illustrative in nature and not used to limit the protection scope of the claims.

[0031] Embodiment 1:

[0032] A utility knife includes a knife body, and a blade chuck 100 is provided at the end of the knife body. The blade 200 is horizontally installed in the first clamping groove of the blade chuck 100 or vertically installed in the second clamping groove of the blade chuck 100. The blade chuck 100 has two installation positions, including a vertical installation position and a horizontal installation position. The vertical installation position corresponding to the first clamping groove can realize the vertical installation of the blade 200 for use as a cutting knife, and the horizontal installation position corresponding to the second clamping groove can realize the horizontal installation of the blade 200 for use as a flat spatula.

[0033] As Figures 1 to 3 shown, the blade chuck 100 includes a chuck body 110 and a positioning member 120. The chuck body 110 is used to clamp the blade 200 to realize the vertical and horizontal installation of the blade 200, and the positioning member 120 is used to limit the position of the installed blade 200 to ensure the stable installation of the blade 200. The chuck body 110 can be integrally formed with the knife body or connected to the knife body by mechanical connection.

[0034] In this embodiment, the blade 200 is a commonly used trapezoidal art knife in the prior art. The two tips of the trapezoidal art knife are trapezoidal. When vertically installed, the blade 200 exposed outside the chuck body 110 has the same shape as a cutting knife and can realize the cutting function. When horizontally installed, the blade 200 exposed outside the chuck body 110 has the same shape as a spatula and can realize the scraping function.

[0035] See Figures 2 to 5, the head of the chuck body 110 is open and provided with a first clamping groove 111 for vertically clamping the blade 200 and a second clamping groove 112 for horizontally clamping the blade 200. The first clamping groove 111 and the second clamping groove 112 partially overlap. The first clamping groove 111 is a trapezoidal groove adapted to the shape of one side tip of the blade 200. One side tip of the blade 200 is completely stuck in the trapezoidal groove. The trapezoidal shape of the trapezoidal groove completely surrounds and limits one side tip of the blade 200. For the installation effect diagram, see Figure 4 , the second clamping groove 112 is a rectangular groove adapted to the rear end of the blade 200. The front end of the rectangular groove penetrates through the chuck body 110. The rear end (the end opposite to the cutting edge end) of the blade 200 is stuck in the rectangular groove, and both side tips extend out of the rectangular groove. The rectangular groove limits the rear end face of the blade 200. For the installation effect diagram, see Figure 5 , the trapezoidal groove and the rectangular groove are arranged in a cross-overlap manner, and the two cross-overlap at 90°.

[0036] See Figure 6 and Figure 7, the positioning member 120 is installed on the chuck body 110 and includes a positioning lock block 121 and an unlocking lever 122. The positioning lock block 121 is arranged inside the chuck body 110 as a mechanical structure for locking or unlocking the cutting blade 200. One end of the positioning lock block 121 extends to the overlapping part between the first clamping groove 111 and the second clamping groove 112 to cooperate with the cutting blade 200, and the other end is connected to the unlocking lever 122. The positioning lock block 121 can reciprocate in the vertical direction of the first clamping groove 111 and the second clamping groove 112 to lock or unlock the cutting blade 200. The unlocking lever 122 serves as a control structure for driving the vertical movement of the positioning lock block 121. The positioning lock block 121 is arranged at one end of the unlocking lever 122, and the other end of the unlocking lever 122 extends out of the chuck body 110 and is provided with a pressing end 123. The pressing end 123 is located outside the side of the tool body 100 for convenient hand operation. When the pressing end 123 is pressed, the unlocking lever 122 tilts, and the other end is lifted in a lever manner, thereby driving the positioning lock block 121 to move away from the first clamping groove 111 and the second clamping groove 112 to unlock the cutting blade 200. At this time, the cutting blade 200 can be taken out by hand; when the pressing end 123 is released, the unlocking lever 122 resets and tilts in the reverse direction, driving the positioning lock block 121 to approach the first clamping groove 111 and the second clamping groove 112 to lock the cutting blade 200. At this time, the cutting blade 200 is stably fixed. In this embodiment, the unlocking lever 122 is made of a plastic part with certain plastic deformation, and the positioning lock block 121 can be made of a plastic part integrally formed with the unlocking lever 122. When the pressing end 123 is pressed forcefully, the unlocking lever 122 is deformed as a whole to achieve unlocking. When the pressing is stopped, the unlocking lever 122 restores the deformation and maintains the locked state.

[0037] A locking block groove 124 is provided in the chuck body 110, and the positioning locking block 121 can slide along the inner wall of the locking block groove 124. One end of the positioning locking block 121 passes through the locking block groove 124 and cooperates with the blade 200. The blade 200 includes a trapezoidal blade body, and a positioning card slot or a positioning card hole cooperating with the positioning locking block 121 is opened in the middle of the blade body. When the positioning locking block 121 is slidably inserted into the positioning card slot or the positioning card hole, the blade 200 is locked, and the blade 200 can be stably fixed by cooperating with the first clamping groove 111 and the second clamping groove 112. When the positioning locking block 121 is withdrawn from the positioning card slot or the positioning card hole, the blade 200 can be unlocked, and the blade 200 can be removed at this time. In this embodiment, the positioning lock block 121 and the locking block groove 124 are both cylindrical, and the diameter of the locking block groove 124 is larger than the diameter of the positioning lock block 121. When the positioning lock block 121 is driven by the unlocking lever 122 to tilt outward, the positioning lock block 121 can have a small amount of lateral movement, which is conducive to the smooth movement of the positioning lock block 121 in the vertical direction. The size of the positioning slot and the positioning hole is basically corresponding to the size of the positioning lock block 121, which is used to ensure that the position of the blade 200 is stable when locked. When the end of the blade 200 is against the position of the first clamping groove 111 and the second clamping groove 112, the position of the positioning slot and the positioning hole is basically consistent with the position of the positioning lock block 121, and the locking is successfully completed.

[0038] The collet body 110 is provided with a lock rod groove 125 for accommodating the unlocking lever 122. The lock rod groove 125 is arranged in parallel with the first clamping groove 111 and the second clamping groove 112. The width of the lock rod groove 125 basically corresponds to the width of the unlocking lever 122. When the unlocking lever 122 is not forced to deform, the lock rod groove 125 can limit the unlocking lever 122 to a horizontal state. When the pressing end 123 of the unlocking lever 122 is pressed, the other end of the unlocking lever 122 drives the positioning lock block 121 to move away from the first clamping groove 111 and the second clamping groove 112. On the side surface of the inner part of the lock rod groove 125 away from the positioning lock block 121, there is an unlocking retreat inclined groove 126, and the unlocking retreat inclined groove 126 gradually expands the space from the outside to the inside. On the side surface of the outer part of the lock rod groove 125 close to the positioning lock block 121, there is an unlocking pressing inclined groove 127, and the unlocking pressing inclined groove 127 gradually expands the space from the inside to the outside. The unlocking retreat inclined groove 126 and the unlocking pressing inclined groove 127 are located on both sides and at both ends of the unlocking lever 122, so that the unlocking lever 122 can form a lever-type installation method. When the pressing end 123 of the unlocking lever 122 is pressed towards the direction of the unlocking pressing inclined groove 127, the unlocking lever 122 is forced to deform, so that the other end of the unlocking lever 122 moves towards the unlocking retreat inclined groove 126, thereby driving the positioning lock block 121 to unlock the blade 200. For the unlocked state, see Figure 9 ; when the unlocking lever 122 is no longer pressed, the unlocking lever 122 resumes deformation and remains basically parallel in the lock rod groove 125, so that the positioning lock block 121 locks the blade 200. For the locked state, see Figure 8 .

[0039] The collet body 110 includes a collet seat plate 113, a collet middle layer plate 114 and a collet cover plate 115 that are correspondingly buckled. The first clamping groove 111 and the second clamping groove 112 are arranged between the collet seat plate 113 and the collet middle layer plate 114. The positioning member 120 is arranged between the collet middle layer plate 114 and the collet cover plate 115. The positioning lock block 121 is slidably arranged on the collet middle layer plate 114, and one end thereof passes through the collet middle layer plate 114 and extends to the overlapping part between the first clamping groove 111 and the second clamping groove 112. The collet body 110 is composed of the collet seat plate 113, the collet middle layer plate 114 and the collet cover plate 115, and the three can be fixed by screws. The structure is divided into three parts. The tool head is clamped between the collet seat plate 113 and the collet middle layer plate 114. The positioning lock block 121 and the unlocking lever 122 are arranged between the collet middle layer plate 114 and the collet cover plate 115. This design method has the advantages of simple structure and reasonable layout.

[0040] Embodiment 2:

[0041] The structure of this embodiment is basically the same as that of Embodiment 2, and the main difference lies in the different structure of the positioning member 120. In Embodiment 2, the other end of the positioning lock block 121 extends out of the chuck body 110, and a spring pressing piece 128 for pressing the outer surface of the positioning lock block 121 is provided on the chuck body 110. Refer to Figure 10 , the spring pressing piece 128 presses the positioning lock block 121 forcefully, so that the positioning lock block 121 locks the blade 200. When unlocking is required, the spring pressing piece 128 is toggled upward to release the positioning lock block 121, and the tool body is turned downward, so that the positioning lock block 121 moves outward to unlock the blade 200, and at this time, the blade 200 can be removed.

[0042] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A blade chuck, used to install a blade, characterized in that: include: A chuck body, wherein the head opening of the chuck body is provided with a first clamping groove capable of vertically clamping the blade and a second clamping groove capable of horizontally clamping the blade, and the intersection of the first clamping groove and the second clamping groove overlaps; A positioning member is installed on the chuck body, and includes a positioning locking block arranged in the chuck body, one end of the positioning locking block extends to the overlapping part between the first clamping groove and the second clamping groove to cooperate with the blade, and the positioning locking block can reciprocate along the vertical direction of the first clamping groove and the second clamping groove to lock or unlock the blade.

2. The blade chuck according to claim 1, characterized in that: The first clamping groove is a trapezoidal groove adapted to the shape of the tip of one side of the blade, and the second clamping groove is a rectangular groove adapted to the rear end of the blade. The trapezoidal groove and the rectangular groove are arranged to cross and overlap.

3. The blade chuck according to claim 1, characterized in that: A locking block groove is arranged in the chuck body, the positioning locking block can slide along the inner wall of the locking block groove, and one end of the positioning locking block passes through the locking block groove to cooperate with the blade.

4. The blade chuck according to claim 1, characterized in that: The positioning member also includes an unlocking lever for driving the positioning locking block to move vertically. The positioning locking block is arranged at one end of the unlocking lever, and the other end of the unlocking lever extends out of the chuck body and is provided with a pressing end.

5. The blade chuck according to claim 4, characterized in that: A locking rod groove for accommodating the unlocking lever is provided in the chuck body, and the locking rod groove is arranged parallel to the first clamping groove and the second clamping groove; when the pressing end of the unlocking lever is pressed, the other end of the unlocking lever drives the positioning locking block to move in a direction away from the first clamping groove and the second clamping groove.

6. The blade chuck according to claim 5, characterized in that: An unlocking retreat bevel groove is provided on the inner surface of the locking rod groove away from the positioning locking block, and the unlocking retreat bevel groove is inclined from the outside to the inside to gradually expand the space. An unlocking pressing bevel groove is provided on the outer surface of the locking rod groove close to the positioning locking block, and the unlocking pressing bevel groove is inclined from the inside to the outside to gradually expand the space.

7. The blade chuck according to claim 1, characterized in that: The chuck body includes a chuck base plate, a chuck middle plate and a chuck cover plate that are correspondingly buckled, the first chuck groove and the second chuck groove are arranged between the chuck base plate and the chuck middle plate, the positioning piece is arranged between the chuck middle plate and the chuck cover plate, the positioning lock block is slidably arranged on the chuck middle plate, and one end passes through the chuck middle plate and extends to the overlapping part between the first chuck groove and the second chuck groove.

8. The blade chuck according to claim 1, characterized in that: The other end of the positioning locking block extends out of the chuck body, and the chuck body is provided with a spring pressing sheet for pressing the outer surface of the positioning locking block.

9. The blade chuck according to claim 1, characterized in that: The blade comprises a blade body in a trapezoidal shape, and a positioning slot or a positioning hole cooperating with the positioning locking block is provided in the middle of the blade body.

10. A utility knife, comprising a knife body, characterized in that: The end of the blade body is provided with a blade chuck according to any one of claims 1 to 9, and the blade is transversely installed in a first chuck groove of the blade chuck or vertically installed in a second chuck groove of the blade chuck.

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