Compass knife

Abstract

The utility model discloses a compass knife which comprises a body, a sliding groove is formed in the middle of the body, a paper cutting assembly is arranged in the sliding groove in a sliding mode, and a positioning assembly used for positioning the circle center is arranged at the end of the body. The paper cutting assembly comprises a blade fixing column vertically inserted in the sliding groove, a blade is fixed to the lower edge of the blade fixing column, and the upper edge of the blade fixing column penetrates through the body and then is connected with a button. The positioning assembly comprises a hollow positioning column inserted in the body, and the top of the hollow positioning column penetrates through the body and then is connected with a pressing cap. According to the compasses knife, the knife edge can be retracted and stretched out very conveniently, the safety in the using and carrying process is ensured, meanwhile, the telescopic structure has better flexibility for cutting paper with different thicknesses, and the application range is widened.

Description

Technical Field

[0001] The utility model relates to a paper cutting tool, in particular to a compass knife. Background Art

[0002] The existing compass knife must be manually adjusted in advance to match the blade range of paper cutting of different thicknesses each time. Its structure is large and complex, and the number of operations required to disassemble the blade is increased, which not only has poor safety but also affects the realization of continuous cutting and low cutting efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the compass knife in the prior art that the compass knife has a single function and is inconvenient to use, and a compass knife is proposed.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] A compass knife, characterized in that: it comprises a body, a slide groove is provided in the middle of the body, a paper cutting assembly is slidably arranged in the slide groove, and a positioning assembly for locating the center of a circle is provided at the end of the body;

[0006] The paper cutting assembly includes a blade fixing column vertically inserted into the slide slot, the lower edge of the blade fixing column fixes the blade, and the upper edge of the blade fixing column passes through the body and is connected to the button;

[0007] The positioning assembly includes a hollow positioning column inserted into the body, and the top of the hollow positioning column passes through the body and is connected to a pressing cap.

[0008] wherein the paper cutting assembly also includes a fixing seat, the fixing seat is provided with a hollow guide rail for inserting the blade fixing column, the outer circumferential surface of the hollow guide rail is provided with an external thread; a first return spring is provided between the blade fixing column and the fixing seat; a fixing seat accessory is clamped at the bottom of the fixing seat, and the fixing seat accessory is provided with a cutting edge corresponding to the end of the blade; the compass knife also includes an adjusting button threadedly connected to the hollow guide rail, the inner edge of the adjusting button is provided with an internal thread adapted to the external thread; the paper cutting assembly also includes a movable column sleeved on the blade fixing column, the button is sleeved on the movable column, the outer edge of the movable column is provided with a first annular gear table, the outer edge of the button is provided with a second annular gear table adapted to the first annular gear table; the top of the button is passed through the top surface of the adjusting button; a longitudinally extending and evenly distributed limit strip is provided on the inner wall of the hollow guide rail, and the outer circumferential surface of the movable column is provided with a groove adapted to the limit strip.

[0009] Wherein, a scale ruler is provided on the slide groove; the paper cutting assembly further comprises a positioning piece located above the main body and sleeved on the hollow guide rail, and a scale needle is provided on the outer edge of the positioning piece.

[0010] In which, the main body is provided with an upward extending positioning hole, and the hollow positioning column is inserted into the positioning hole; the positioning assembly also includes a sleeve, a second return spring is sleeved on the hollow positioning column, and the sleeve is sleeved on the second return spring and the hollow positioning column; the upper edge of the second return spring abuts against the sleeve, and the lower edge of the second return spring abuts against the upper edge of the positioning hole.

[0011] Wherein, an anti-slip pad is fixed at the bottom of the hollow positioning column.

[0012] The push cap is made of a transparent material, and a center mark is provided on the surface of the push cap.

[0013] The above technical solution can achieve the following beneficial effects: the compass knife in the utility model can very conveniently retract and extend the blade, ensuring safety during use and carrying. At the same time, its retractable structure has better flexibility for cutting paper of different thicknesses, expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded view of a compass knife according to a preferred embodiment of the present invention.

[0015] Figure 2 It is a transverse sectional view of the compass knife of the present embodiment.

[0016] Figure 3 It is a longitudinal sectional view of the compass knife of the present embodiment.

[0017] Figure 4 It is a schematic diagram of the bottom surface structure of the compass knife of this embodiment. DETAILED DESCRIPTION

[0018] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0019] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figure 1-4 As shown, the compass cutter in this embodiment includes a main body 1, a slide groove 11 is provided in the middle of the main body 1, a paper cutting component is slidably provided in the slide groove 11, and a positioning component for locating the center of the circle is provided at the end of the main body.

[0021] Specifically, the paper cutting assembly includes a blade fixing post 34 vertically inserted into the slide slot 11. The lower edge of the blade fixing post 34 fixes the blade 33, and the upper edge of the blade fixing post 34 passes through the body 1 and connects to a button 38. The paper cutting assembly also includes a fixing base 31, which is provided with a hollow guide rail 311 for inserting the blade fixing post 34. The outer circumference of the hollow guide rail 311 is provided with an external thread. A first return spring 32 is provided between the blade fixing post 34 and the fixing base 31. A fixing base attachment 35 is fixed to the bottom of the fixing base 31. The fixing base attachment 35 is provided with a cutting edge 351 corresponding to the end of the blade 33. In this embodiment, the fixing base 31 and the fixing base attachment 35 are connected by a notch 312 provided in the side wall of the fixing base 31 and a buckle 352 provided on the outer edge of the fixing base attachment 35.

[0022] The compass cutter also includes an adjustment button 39 threadedly connected to the hollow guide rail 311, and the inner edge of the adjustment button 39 is provided with an internal thread that matches the external thread. The paper cutting assembly also includes a movable column 37 sleeved on the blade fixing column 34, and the button 38 is sleeved on the movable column 37. The outer edge of the movable column 37 is provided with a first annular gear, and the outer edge of the button 38 is provided with a second annular gear that matches the first annular gear. The top of the button 38 is extended from the top surface of the adjustment button 39. The inner wall of the hollow guide rail 311 is provided with longitudinally extending and evenly distributed limit strips, and the outer peripheral surface of the movable column 37 is provided with a groove that matches the limit strip. A safety structure is formed between the button 38, the adjustment button 39, the blade fixing column 34, the first return spring 32, the limit strip and the groove. When in use, the top blade of the button 38 can be extended downward by pressing the button 38. After use, the top blade of the button 38 can be retracted by pressing the button 38 again. The cooperation between the first and second annular gears ensures safety during use and carrying.

[0023] In addition, the body 1 is provided with an upwardly extending positioning hole 12, and the positioning assembly includes a hollow positioning column 21 inserted into the positioning hole 12. The top of the hollow positioning column 21 passes through the positioning hole 12 of the body 1 and is connected to a push cap 24 made of a transparent material.

[0024] Specifically, the positioning assembly further includes a sleeve 23. A second return spring 22 is sleeved on the hollow positioning post 12. The sleeve 23 is sleeved over the second return spring 22 and the hollow positioning post 21. The upper edge of the second return spring 22 abuts against the inner surface of the sleeve 23, and the lower edge of the second return spring 22 abuts against the upper edge of the positioning hole 12.

[0025] To better locate the center of the circle, the push cap 24 is made of a transparent material and has a center mark on its surface. Looking down from the top of the push cap 24, the center of the circle to be located can be accurately and clearly seen through the middle of the hollow positioning column 21. To prevent the compass knife from slipping when cutting paper, an anti-slip pad 25 is also fixed to the bottom of the hollow positioning column 21.

[0026] In addition, in order to determine the size of the cutting circle, a scale ruler is provided on the edge of the slide groove 11 , a positioning piece 36 is sleeved on the hollow guide rail 311 above the main body, and a scale needle is provided on the outer edge of the positioning piece 36 .

[0027] The compass knife in this embodiment uses elastic positioning and downward pressure to easily retract and extend the blade, ensuring safety during use and portability. Its retractable structure also provides greater flexibility for cutting paper of varying thicknesses, expanding its applicability. Furthermore, its center positioning allows it to locate any paper within a certain range to cut a desired size circle or concentric circle, expanding its applicability to a wider range of scenarios.

[0028] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A compass knife, characterized by: It comprises a body, a slide groove is provided in the middle of the body, a paper cutting assembly is slidably arranged in the slide groove, and a positioning assembly for locating the center of a circle is provided at the end of the body; The paper cutting assembly includes a blade fixing column vertically inserted into the slide slot, the lower edge of the blade fixing column fixes the blade, and the upper edge of the blade fixing column passes through the body and is connected to the button; The positioning assembly includes a hollow positioning column inserted into the body, and the top of the hollow positioning column passes through the body and is connected to a pressing cap.

2. The compass knife according to claim 1, characterized in that: The cam is secured to the base with a secure connection to the blade, and the cam has a locking mechanism which allows the cam to lock onto the blade, the locking mechanism being secured to the base with a secure connection to the blade.

3. The compass knife according to claim 2, characterized in that: The slide groove is provided with a scale ruler; the paper cutting assembly further comprises a positioning piece located above the body and sleeved on the hollow guide rail, and a scale needle is provided on the outer edge of the positioning piece.

4. The compass knife according to claim 3, characterized in that: The main body is provided with an upward extending positioning hole, and the hollow positioning column is inserted into the positioning hole; the positioning assembly also includes a sleeve, a second return spring is sleeved on the hollow positioning column, and the sleeve is sleeved on the second return spring and the hollow positioning column; the upper edge of the second return spring abuts against the sleeve, and the lower edge of the second return spring abuts against the upper edge of the positioning hole.

5. The compass knife according to claim 4, characterized in that: An anti-slip pad is fixed on the bottom of the hollow positioning column.

6. The compass knife according to claim 5, characterized in that: The push cap is made of a transparent material, and a center mark is provided on the surface of the push cap.

Images