A utility knife

Abstract

The present application belongs to the technical field of cutting tools, and particularly relates to a stationery knife. The stationery knife comprises a knife shell, knife holders slidably arranged in the knife shell, and blades arranged on the knife holders. The knife holders are arranged in at least two along the width direction of the knife shell. A locking mechanism is slidably arranged in the knife shell along the length direction of the knife shell. A push key switch is slidably arranged on the locking mechanism along the width direction of the knife shell. The push key switch can be clamped on each knife holder through a clamping structure. The relative positions of the knife holders can be adjusted by pushing the push key switch along the length direction of the knife shell, and the relative positions of the knife holders can be fixed through the locking mechanism. The present application can arrange multiple blades in the knife shell, and the required blade can be pushed out and the relative positions of the blades can be locked and steplessly adjusted.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cutting knives, and particularly relates to a multi-extendable blade art knife. BACKGROUND

[0002] The existing art knife generally only has one blade fixedly clamped on the blade holder and adjusted in length by the push key switch to push the blade holder. In addition, the relative position of the blade is locked by the elastic member arranged on the blade holder or the push key switch and the clamping groove arranged on the blade shell. For details, please refer to the Chinese patent application for invention with the application number 201911266874.0.

[0003] However, the above-mentioned prior art has the following technical problems: 1. Since there are many cutting scenarios in daily life, such as cutting thick and hard materials such as cloth and leather, which require the use of hard cutting blades, and when cutting thin and soft materials such as paper and adhesive tape, the art blade is generally used. In addition, there are different types of blades designed according to other cutting scenarios. The existing art knife only has one blade, but the above-mentioned use scenarios are common, and people cannot prepare a set of art knives with various types of blades at home or work, and too many types also occupy space. Therefore, it is urgent to design an art knife that can set multiple blades in the blade shell and selectively push out the required blade; 2. The existing art knife generally locks the blade by the mutual cooperation of the elastic member and the clamping groove. In actual use, there are problems such as difficulty in pushing the push key switch and the blade holder, and the specific position of the blade holder and the blade cannot be adjusted steplessly. SUMMARY

[0004] To solve at least one of the technical problems in the prior art, the present application provides an art knife that can set multiple blades in the blade shell and selectively push out the required blade, and can adjust the relative position of the blade steplessly.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] An art knife includes a blade shell, a blade holder sliding in the blade shell, and a blade arranged on the blade holder. The blade holder is arranged at least two along the width direction of the blade shell. A locking mechanism is arranged in the blade shell along the length direction of the blade shell. A push key switch is arranged on the locking mechanism along the width direction of the blade shell. The push key switch can be clamped on each blade holder by a clamping structure. The relative position of the blade holder can be adjusted by pushing the push key switch along the length direction of the blade shell, and the relative position of the blade holder can be fixed by the locking mechanism.

[0007] Preferably, the locking mechanism comprises a sliding plate slidingly arranged in the knife shell, a cover plate arranged above the sliding plate, a guide plate fixedly connected to the lower end surface of the cover plate, and a pressing spring fixedly connected between the cover plate and the sliding plate; a sliding plate through slot is formed in the sliding plate, the guide plate can slide through the sliding plate through slot, and the lower end of the guide plate can abut against the knife shell; a cover plate sliding slot is formed in the cover plate along the width direction of the knife shell, and the push key switch slides through the cover plate sliding slot.

[0008] Preferably, a sliding plate groove is formed in the upper end surface of the sliding plate, a mounting column is fixedly connected to the lower end surface of the cover plate, one end of the pressing spring is sleeved on the mounting column, and the other end of the pressing spring is embedded in the sliding plate groove.

[0009] Preferably, an arcuate slot is formed in the lower end surface of the sliding plate, the depth of the arcuate slot gradually decreases from the middle part to both sides, two locking balls are arranged to roll in the arcuate slot, a locking spring is arranged between the two locking balls, and the sliding plate through slot is formed in both sides of the arcuate slot; when the push key switch is pressed, the two guide plates drive the two locking balls to move towards the middle part of the arcuate slot, so that the locking balls are separated from the knife shell; when the push key switch is not pressed, the two locking balls move towards both sides of the arcuate slot, so that the locking balls abut against the knife shell.

[0010] Preferably, a guide plate notch is formed in the inner side end surface of the guide plate abutting against the locking ball.

[0011] Preferably, the clamping structure comprises a “convex”-shaped clamping groove formed in one end of the knife holder close to the push key switch, and a clamping block fixedly connected to the push key switch close to one end of the knife holder and matched with the clamping groove; when the clamping block of the push key switch slides along the width direction of the knife shell, the clamping block can be sequentially clamped in the clamping groove, and the clamping block can slide along the height direction of the knife shell in the clamping groove.

[0012] Preferably, a support plate is fixedly arranged in the knife shell along the length direction of the knife shell, a sliding protrusion is formed in the knife holder, and a support plate sliding slot is formed in the support plate corresponding to the sliding protrusion; the sliding protrusion can slide through the support plate sliding slot.

[0013] Preferably, a knife holder groove is formed in the side end surface of the knife holder along the width direction of the knife shell, one end of the positioning spring abuts against the groove bottom of the knife holder groove, and the other end of the positioning spring abuts against the positioning ball; positioning grooves are formed in the inner side end surface of the knife shell and the support plate, and the positioning ball can be clamped in the corresponding positioning groove.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] The present application sets multiple knife holders and corresponding blades in the knife shell, and can realize different functions according to different types of blades; by setting the push key switch and the clamping structure, only one push key switch can be set to selectively push a certain knife holder, so that a certain type of blade is pushed out of the knife shell to cut the object and the length of the blade extending out of the knife shell can be adjusted; by setting the locking mechanism associated with the push key switch, the push key switch, the knife holder and the corresponding blade are locked, and in addition, the locking mechanism can realize stepless adjustment and locking of the knife holder and the blade. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of four use states of the present application.

[0017] Figure 2 It is the explosive structural schematic diagram of the present application.

[0018] Figure 3 It is the structural schematic diagram of the present application after removing the knife shell.

[0019] Figure 4 It is the first perspective structural schematic diagram of the support plate of the present application.

[0020] Figure 5 It is the second perspective structural schematic diagram of the support plate of the present application.

[0021] Figure 6 It is the first perspective structural schematic diagram of the knife holder of the present application.

[0022] Figure 7 It is the second perspective structural schematic diagram of the knife holder of the present application.

[0023] Figure 8 It is the structural schematic diagram of the knife shell one of the present application.

[0024] Figure 9 It is the overhead structural schematic diagram of the present application.

[0025] Figure 10 It is the A-A cross-sectional structural schematic diagram of the present application. Figure 9

[0026] Figure 11 It is the structural schematic diagram of the push key switch of the present application.

[0027] Figure 12 It is the partial connection structural schematic diagram of the push key switch and the locking mechanism of the present application.

[0028] Figure 13 It is the structural schematic diagram of the cover plate of the present application.

[0029] Figure 14 It is the structural schematic diagram of the sliding plate of the present application. ​

[0030] Figure 15 Figure 1 is a schematic diagram of the connection structure of the sliding plate and the locking spring and the locking ball of the present application.

[0031] Figure 16 Figure 2 is a schematic diagram of the partial cross-sectional structure of the locking mechanism of the present application.

[0032] Figure 1 is a schematic diagram of the connection structure of the sliding plate and the locking spring and the locking ball of the present application.

[0033] 2, knife holder, 21, sliding convex, 22, knife holder groove, 23, positioning spring, 24, positioning ball, 25, clamping groove,

[0034] 3, blade, 31, blade one, blade two 32, 33, blade three,

[0035] 4, push key switch, 41, push key, 42, connecting plate, 43, clamping plate, 44, clamping block, 45, plug-in plate,

[0036] 5, locking mechanism, 51, fixed plate, 52, sliding plate, 521, sliding plate through slot, 522, sliding plate groove, 523, arcuate slot, 53, cover plate, 531, cover plate sliding groove, 532, mounting column, 54, guide plate, 541, plate notch, 55, pressing spring, 56, locking ball, 57, locking spring,

[0037] 6, support plate, 61, support plate sliding groove, 62, positioning groove, 63, support plate notch. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. EMBODIMENT

[0040] Reference Figure 1 , 2The relative position of the blade in the present embodiment is described as follows: the length direction of the knife shell refers to the direction of the blade movement (see the X direction in Figure 1 ), the width direction of the knife shell refers to the direction perpendicular to the two side surfaces of the blade (see the Y direction in Figure 1 ), and the height direction of the knife shell refers to the direction parallel to the two side surfaces of the blade (see the Z direction in Figure 1 ).

[0041] The utility model provides a Swiss knife, including knife shell 1, the knife holder 2 of sliding in knife shell 1 and the detachable fixed card of the blade 3 on the knife holder 2, still including push key switch 4 and locking mechanism 5, push key switch 4 is used to push the knife holder 2 along the length direction of knife shell 1 to adjust the relative position of the blade 3 in knife shell 1, and locking mechanism 5 is used to fix the knife holder 2 to fix the fixed position of the blade 3 in knife shell 1.

[0042] In order to push out different kinds of blades 3 from the knife shell 1 to perform different cutting tasks by the push key switch 4, the knife holder 2 is provided with at least two in the width direction of the knife shell 1, and in the present embodiment, the knife holder 2 is provided with three. The connecting structure of the knife holder 2 between the blades 3 can be adaptively changed according to the specific size and specifications of the blades, which is prior art and will not be described here. Of course, the three blades 3 on the knife holder 2 can also be of the same type.

[0043] The locking mechanism 4 is slidingly arranged in the length direction of the knife shell 1 in the knife shell 1, and the push key switch 3 is slidingly arranged on the locking mechanism 5 in the width direction of the knife shell 1. In order to reduce the parts of the Swiss knife and lower the structural complexity of the Swiss knife, the push key switch 3 is provided with one and can be selectively clamped on a certain knife holder 2 by a clamping structure. When the push key switch 3 is clamped on a certain knife holder 2, pushing the push key switch 3 can push the knife holder 2 to drive the blade 3 installed on the knife holder 2 to move.

[0044] In the present embodiment, the knife shell 1 includes the knife shell one 11 and the knife shell two 12 that can be fixed and covered with each other, and the knife shell through slot 13 is formed on the corresponding upper end surfaces of the knife shell one 11 and the knife shell two 12, and the push key switch 3 can slide in the length and width directions of the knife shell 1 in the knife shell through slot 13. Three blade outlets 14 are formed on one end of the knife shell 1 and matched with the blades 3, and each blade 3 is arranged outside the knife shell 1 from the corresponding blade outlet 14.

[0045] Referring to Figure 3 , 4As shown, in order to improve the smoothness of the sliding of the tool holder 2 and the structural strength between the tool holder 2 and the tool case 1, the support plates 6 are fixed and clamped between the two tool holders 2 in the tool case 1 and between the tool holder 2 and the tool case 1 along the length direction of the tool case 1, that is, in this embodiment, two support plates 6 are provided. When the tool case one 11 and the tool case two 12 are fixed and covered by bolts, the support plate 6 is fixed and clamped by the tool case one 11 and the tool case two 12.

[0046] Further, the support plate sliding grooves 61 are formed on the two side end faces of the support plate 6 along the length direction thereof.

[0047] Referring to Figure 8 As shown, the tool case sliding grooves 15 are formed on the inner side end face of the tool case one 11 along the length direction thereof.

[0048] Referring to Figure 6 As shown, the two parallel sliding protrusions 21 are integrally formed on the one side end face of the tool holder 2 along the length direction thereof, and the sliding protrusions 21 are slidably clamped in the support plate sliding grooves 61 and the tool case sliding grooves 15. Through the above structure, the tool holder 2 drives the corresponding blade 3 to slide in the tool case 1 under the guidance of the support plate sliding grooves 61 and the tool case sliding grooves 15.

[0049] Referring to Figure 7 As shown, further, in order to position the tool holder 2 when the tool holder 2 moves to the initial point (that is, the tool holder 2 is in the fully retracted state) and remind the user that the tool holder 2 has been fully retracted, in this embodiment, the tool holder recess 22 is formed on the one side end face of the tool holder 2 away from the sliding protrusion 21 along the width direction of the tool case 1.

[0050] Referring to Figure 5 , 9 , 10, one end of the positioning spring 23 is fixed and abuts the groove bottom of the tool holder recess 22, and the other end of the positioning spring 23 abuts the positioning ball 24, and the positioning grooves 62 are formed on the inner side end face of the tool case two 12 and the support plate 6 opposite to the positioning ball 24, when the positioning ball 24 is clamped in the corresponding positioning groove 62, the tool holder 2 is not easy to shake. In addition, when the tool holder 2 slides, by setting the positioning spring 23 and the positioning ball 24, a certain extrusion force is applied to the tool holder 2, the damping effect when the tool holder 2 slides is improved, thereby improving the hand feeling when the user pushes the push key switch 4.

[0051] Referring to Figure 7 , 11As shown, the push-key switch 4 comprises a push key 41 arranged above the shell through slot 13, a connecting plate 42 integrally formed with the push key 41 arranged on the lower end surface of the push key 41, and a clamping plate 43 fixedly connected to the lower end surface of the connecting plate 42. The connecting plate 42 can slide between the two support plates 6, between the first knife shell 11 and the adjacent support plate 6, and between the second knife shell 12 and the adjacent support plate 6. Further, a support plate notch 63 is formed on one end of the support plate 6 close to the push-key switch 4, and the upper end surface of the clamping plate 43 can be clamped in the support plate notch 63 in the width direction of the knife shell 1 to prevent the push-key switch 4 from being detached from the shell through slot 13.

[0052] The clamping structure in the embodiment comprises a "n" shaped clamping groove 25 formed on one end of the tool holder 2 close to the push-key switch 4, and a "n" shaped clamping block 44 fixedly connected to one end of the clamping plate 43 close to the tool holder 2 and matched with the clamping groove 25. The clamping block 44 of the push-key switch 4 can be sequentially clamped in the clamping groove 25 when sliding in the width direction of the knife shell 1, and the clamping block 44 can slide in the height direction of the knife shell 1 in the clamping groove 25. In addition, two plug-in plates 45 are integrally formed and fixedly connected to the lower end surface of the clamping plate 43, and the two plug-in plates 45 are used to be slidingly inserted into the following locking mechanism 5.

[0053] Referring to Figure 12 , 13 As shown, the locking mechanism 5 comprises a fixed plate 51 fixedly clamped on the bottom of the knife shell 1, a sliding plate 52 sliding on the upper end surface of the fixed plate 51 in the length direction of the knife shell 1, a cover plate 53 arranged above the sliding plate, a guide plate 54 fixedly connected to the lower end surface of the cover plate 53, and a pressing spring 55 fixedly connected between the cover plate 53 and the sliding plate 52. A sliding plate through slot 521 is formed on the sliding plate 52, the guide plate 54 can slidingly pass through the sliding plate through slot 521, and the lower end of the guide plate 54 can abut against the upper end surface of the fixed plate 51 on the knife shell 1. A cover plate sliding groove 531 is formed on the cover plate 53 in the width direction of the knife shell 1, and the plug-in plate 45 of the push-key switch 4 slidingly passes through the cover plate sliding groove 531. Further, a sliding plate recess 522 is formed on the upper end surface of the sliding plate 52, a mounting column 532 is fixedly connected to the lower end surface of the cover plate 53, one end of the pressing spring 55 is sleeved on the mounting column 532, and the other end of the pressing spring 55 is embedded in the sliding plate recess 522. Through the above structure, when the relative position of the tool holder 2 needs to be locked, the push-key switch 4 needs to be continuously pressed to make the guide plate 54 tightly abut against the upper end surface of the fixed plate 51.

[0054] Referring to Figure 14 , 15, 16, further, in order to make the slide plate 52 automatically fixed on the fixed plate 51 after the specific position of the tool rest 2 and the blade 3 is adjusted, so as to facilitate the relative position locking of the tool rest 2 and the stepless adjustment of the position of the tool rest 2, in the embodiment, the arcuate slot 523 is formed in the lower end surface of the slide plate 52, and the groove depth of the arcuate slot 523 gradually decreases from the middle part to both sides. Two locking balls 56 are arranged to roll in the arcuate slot 523, and the locking spring 57 is arranged between the two locking balls 56. The slide plate through slot 521 is formed on both sides of the arcuate slot 523. When the push key switch 4 is pressed, the two guide plates 54 drive the two locking balls 56 to move to the middle part of the arcuate slot 523 to make the locking balls 56 disengage from the upper end surface of the fixed plate 51 fixed on the tool shell 1, so that the push key switch 4 can drive a certain tool rest 2 and the corresponding blade 3 to slide when it is pushed. When the push key switch 4 is not pressed, the two locking balls 56 move to both sides of the arcuate slot 523 under the action of the elastic force of the locking spring 57 to make the locking balls 56 abut against the upper end surface of the fixed plate 51 fixed on the tool shell 1. At this time, because the groove depth gradually decreases on both sides of the arcuate slot 523, the locking balls 56 are gradually extruded, so that the slide plate 52 cannot slide relative to the fixed plate 51, and the push key switch 4, the tool rest 2 and the corresponding blade 3 cannot slide, thereby locking the position of the tool rest 2 and the corresponding blade 3.

[0055] Further, in order to facilitate the inside of the guide plate 54 to extrude the locking ball 56 to make the locking ball 56 move to the middle part of the arcuate slot 523, the guide plate notch 541 is formed in the inside end surface of the guide plate 54 abutting against the locking ball 56, and the guide plate notch 541 is a bevel structure.

[0056] The working process of the embodiment of the application is as follows:

[0057] Referring to Figure 1 The push key switch 4 is in the initial state, and at this time, the three blades 3 are not extended out of the tool shell 1, and the connecting plate 42 has not entered between the two support plates 6 or between the support plate 6 and the tool shell 1.

[0058] Referring to Figure 1When the blade 31 is used, the push key switch 4 is pushed towards the blade housing 12, then the push key 41 is pressed and pushed to make the connecting plate 42 enter between the blade housing 2 and the adjacent support plate 6, at this time the guide plate 54 extrudes the two locking balls 56 to make the locking balls 56 disengage from the upper end surface of the fixed plate 51, the push key switch 4 drives the locking mechanism 5 to move along the length direction of the blade housing 1 to adjust the length of the blade 31 extending out of the blade housing 1; after the length of the blade 31 extending out is adjusted, the push key 41 is not pressed any more, the cover plate 53 and the guide plate 54 are lifted up under the rebounding force of the pressing spring 55, the two locking balls 56 move to the two sides of the arc-shaped slot 523 under the action of the locking spring 57, so that the locking balls 56 tightly press the upper end surface of the fixed plate 51, at this time, the locking mechanism 5, the push key switch 4, the blade holder 2 and the blade 21 are all fixed, then the utility knife can be used; after use, the push key 41 is pressed again and pushed back to make the connecting plate 42 disengage from between the blade housing 2 and the adjacent support plate 6, at this time, the positioning ball 24 enters the positioning slot 62 on the blade housing 2 under the action of the positioning spring 23.

[0059] Similarly, referring to the states C and D shown in Figure 1 , which are respectively the structure schematic diagrams when the blade 32 and the blade 33 are used, the working principles of pushing and locking the blade 32 and the blade 33 are the same as those when the blade 31 is used, which will not be described here.

[0060] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A utility knife comprising a knife housing, a knife holder slidably disposed within the knife housing, and a blade disposed on the knife holder, characterized in that: At least two knife holders are provided along the width direction of the knife housing; a locking mechanism is slidably provided in the knife housing along the length direction of the knife housing, and a push-button switch is slidably provided on the locking mechanism along the width direction of the knife housing. The push-button switch can be respectively clamped on each knife holder through a clamping structure; the relative position of the knife holder can be adjusted by pushing the push-button switch along the length direction of the knife housing, and the relative position of the knife holder can be fixed by the locking mechanism.

2. The utility knife according to claim 1, characterized in that: The locking mechanism includes a slide plate slidably arranged in the knife housing, a cover plate arranged above the slide plate, a guide plate fixedly connected to the lower end surface of the cover plate, and a pressing spring fixedly connected between the cover plate and the slide plate; a slide plate slot is provided on the slide plate, the guide plate can be slidably passed through the slide plate slot and its lower end can abut against the knife housing; a cover plate slot is provided on the cover plate along the width direction of the knife housing, and the push button switch is slidably passed through the cover plate slot.

3. The utility knife according to claim 2, characterized in that: A slide groove is provided on the upper end surface of the slide, a mounting post is fixedly connected to the lower end surface of the cover plate, one end of the pressing spring is sleeved on the mounting post and the other end is embedded in the slide groove.

4. The utility knife according to claim 2, characterized in that: An arched groove is provided on the lower end surface of the slide plate, and the depth of the arched groove gradually decreases from the middle to both sides; two locking balls are arranged to roll in the arched groove, and a locking spring is provided between the two locking balls, and the slide plate through groove is provided on both sides of the arched groove; when the push button switch is pressed, the two guide plates respectively drive the two locking balls to move toward the middle of the arched groove to make the locking balls separate from the knife housing; when the push button switch is not pressed, the two locking balls move to both sides of the arched groove to make the locking balls abut against the knife housing.

5. The utility knife according to claim 4, characterized in that: A guide plate notch is provided on the inner end surface of the guide plate where the guide plate contacts the locking ball.

6. The utility knife according to claim 1, characterized in that: The clamping structure includes a "convex"-shaped clamping groove opened at one end of the knife holder near the push switch, and a clamping block fixedly connected to one end of the push switch near the knife holder and matching the clamping groove; the clamping block of the push switch can be sequentially clamped in the clamping groove when sliding along the width direction of the knife housing, and the clamping block can slide along the height direction of the knife housing in the clamping groove.

7. The utility knife according to claim 1, characterized in that: A support plate is fixedly provided in the knife housing along its length direction, a sliding protrusion is provided on the knife holder, and a support plate sliding groove is correspondingly provided on the support plate, and the sliding protrusion can be slidably inserted into the support plate sliding groove.

8. The utility knife according to claim 7, characterized in that: A knife holder groove is provided on one side end face of the knife holder along the width direction of the knife housing, one end of the positioning spring abuts the bottom of the knife holder groove and the other end abuts the positioning ball, and positioning grooves are provided on the inner end face of the knife housing and the support plate, and the positioning ball can be clamped in the corresponding positioning groove.

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