JPH0595466U - Universal knife - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a universal knife having a rotatable rod engaged with a blade to facilitate cutting a curve. A universal knife capable of switching between a non-rotatable mode for cutting a straight line and a rotatable mode for cutting a curve includes a rod, which engages the blade at one end and the other end. A part is rotatably positioned with respect to the bearing means to provide the blade with an axis of rotation for cutting a curve. A switch button means is located above the bearing means to force the rod and blade to operate in a non-rotatable or rotatable mode.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a universal knife, and more particularly to a universal knife with a rotatable tip for flexible usage.

[0002]

[Prior Art]

 The general knives used today are suitable for cutting straight lines.

[0003]

[Problems to be solved by the device]

 By the way, when the user wants to cut a curve using the conventional knife, he has to rotate his hand continuously to fit the desired curve. However, the effect is usually unsatisfactory because it is not easy to follow the curve with a conventional knife in my hand.

[0004] Therefore, there is a need for a universal knife that does not require the user to keep rotating their hands to cut a curve.

The present invention provides a universal knife that can switch between a non-rotatable mode for cutting a straight line and a rotatable mode for cutting a curve.

An object of the present invention is to provide a universal knife having a rotatable rod engaged with a blade to facilitate cutting a curve.

Another object of the present invention is to provide a versatile knife which can be switched so that it can function in a non-rotatable mode for cutting a straight line and a rotatable mode for cutting a curved line. Is.

These and other objects, even though not specifically described herein, will be apparent to those of skill in the art upon reading the following detailed description, with appropriate reference to the accompanying drawings. ..

[0009]

[Means for Solving the Problems]

 The universal knife according to the present invention is a universal knife that can be switched between a non-rotatable mode that cuts a straight line and a rotatable mode that cuts a curved line. The universal knife has a barrel having an upper end and a lower end, and An upper cap and a lower cap attached to the upper end and the lower end, respectively, each having a passage in the center, and a contact rod, and securely received in the upper end of the barrel. And a switching button means for positioning the contact rod at an upper stable position or a lower stable position, and a third cap engaged with the first tube, and slidably received by the switching button means, The third cap securely engages the bearing means in contact with the contact rod of the switching button means with the first tube to form a shoulder portion therebetween. A tube, a first spring that surrounds the second tube, both ends of which are in contact with the shoulder portion and the lower cap, respectively, and a tip portion and an engaging end portion. It is non-slidably received in the first tube and the second tube, the tip end abuts the third cap, and the engagement end is outside the lower cap through the passage. A rod which protrudes to the connector means and which is further connected to the connector means, and a head which has a second socket for engaging the connector means at one end thereof and a blade at the other end thereof. The connector means engages the lower cap to cause the blade to function in a non-rotatable mode when the contact rod remains in the upper stable position, and the contact rod is in the lower stable position. Said connector means to come is away from the lower cap, the rod constitutes the rotation axis of the head, and to function in a rotatable mode the blade.

[0010]

[Action]

 According to the above configuration, by operating the switching button means, the blade arranged on the head is switched between the rotatable mode in which the blade rotates with respect to the barrel and the non-rotatable mode in which the blade does not rotate with respect to the barrel. Be done.

[0011]

【Example】

 Referring to FIG. 1, the universal knife of the present invention has an elongated appearance. The button 21 is slidably incorporated in an upper cap 13 inserted into one end of the barrel 10. On the other hand, a lower cap 50 is inserted into the other end of the barrel 10. A connector means 60 is engaged with the lower cap 50, and a blade 72 is attached to a head 70 connected to the connector means 60. In FIG. 1, the universal knife is in a non-rotatable mode for cutting a straight line. When the button 21 is pressed (FIG. 4), the connector means 60 is separated from the lower cap 50 and the universal knife is switched into a rotatable mode for cutting the curve. The rotatable mode will be described later in detail.

With reference to FIGS. 2-4, the universal knife comprises a barrel 10 having an upper end 11 and a lower end 12. An upper cap 13 and a lower cap 50 each having a passage in the center are attached to the upper end 11 and the lower end 12, respectively. The switching button means 20 includes an outer tube 24, a contact rod 23, a button 21 and a second spring 22. The outer tube 24 cooperates with the button 21 and the contact rod 23 to allow the button 21 to be in the upper stable position or the lower stable position. It has a protruding bar. The button 21 has a first shoulder 210 at the center thereof. The second spring 22 is firmly seated around the lower portion of the button 21 and has its ends on the first shoulder 210 of the button 21 and the outer tube, as shown in FIGS. 3 and 4. 24 and the upper end portions of 24, respectively. The contact rod 23 and the lower portion of the button 21 are slidably received in an outer tube 24 which is rigidly attached to the upper portion of the inner peripheral surface of the barrel 10.

For example, if the universal knife is in the non-rotatable mode, the button 21 will remain in the upper position relative to the upper cap 13, as shown in FIG. It is possible to switch the knife into a rotatable mode by pressing the button 21 by hand, which causes the contact rod 23 to move from a relatively upper stable position to a relatively lower position, as shown in FIG. It is possible to switch to a stable position. When the universal knife is in the rotatable mode, the button 21 is in a relatively lower position with respect to the upper cap 13, as shown in FIG. The universal knife can be switched to the non-rotatable mode by pushing the button 21 by hand, which allows the contact rod 23 to be compared in the outer tube 24 from its relatively lower stable position, as shown in FIG. It is possible to switch to a stable position on the upper side. The switching button means 20 is a well-known means such as applied to a knock type ballpoint pen, which will not be described in detail here.

The bearing means 30 slidably received in the outer tube 24 of the switch button means 20 includes a third cap 32 engaged with a first tube 31, which third cap 32 is a switch button. The contact rod 23 of the means 20 abuts upward. The third cap 32 has a notch 320, as shown in FIGS. 3 and 4, for purposes described below.

The second tube 33 is tightly engaged with the first tube 31 thereby forming a second shoulder 35 therebetween, as shown in FIGS. 3 and 4. The first spring 34 surrounds the second tube 33, and both ends thereof are in contact with the second shoulder portion 35 and the lower cap 50, respectively. Therefore, when the universal knife is in the rotatable mode, the contact rod 23 is in a stable lower position, forcing the second shoulder 35 to depress the first spring 34 as shown in FIG. When the universal knife is switched from the rotatable mode to the non-rotatable mode, the button 21 of the switching button means 20 is in a relatively upper position with respect to the upper cap 13, and the first spring 34 pushes the bearing means 30 upward. This means 30 pushes the contact rod 23 upwards against the button 21. The bottom end of the button 21 remains inside the outer tube 24 by the inner flange 240 of the outer tube 24.

A rod 40 having a tip 41 and an engaging end 45 is rotatably but non-slidably received in the first tube 31 and the second tube 33, the front end 41 of which is It abuts the notch 320 of the third cap 32 and its engaging end 45 projects out of the lower cap 50 and is further connected to the connector means 60.

The rod 40 has a groove 42 for receiving the C-shaped ring 43 near the tip portion 41 thereof. The C-shaped ring 43 received in the groove 42 is arranged in the first tube 31, and is received inside the first tube 31 and placed on the upper end portion of the second tube 33, so that the rod 40 is moved into the first tube 31. 2 Limited to a fixed position with respect to the tube 33.

The lower cap 50 has a first engagement surface 51 (FIGS. 3 and 4), while the connector means 60 has a second engagement surface 61, such as a toothed surface, for the button. When 21 is in the upper stable position, i.e. when the universal knife is in the non-rotatable mode, it non-rotatably interengages as shown in FIG.

The connector means 60 has a second socket 63 for receiving the engagement end 45 of the rod 40 in the center of the second engagement surface and engages the head 70 on the opposite surface thereof. It has a plug end 62.

The head 70 has a second socket 71 for engaging the plug end 62 of the connector means 60 at one end thereof, and a blade 72 at the other end thereof, so that the contact rod 23 is When in the upper stable position, the connector means 60 engages the lower cap 50 to render the blade 72 non-rotatable as shown in FIG. 3 and the contact rod 23 is in the lower stable position. Sometimes, the connector means 60 is separated from the lower cap 50, and the rod 40 whose tip 41 is in contact with the notch 320 of the third cap 32 constitutes the rotation axis of the head 70, as shown in FIG. It allows the universal knife to function in rotatable mode. The notch 320 is used to limit the rotation of the tip 41 of the rod 40 inside when the universal knife is in the rotatable mode.

Please refer to FIG. When cutting a curve with this universal knife, the lateral force applied to the barrel 10 by the user is transmitted from the rod 40 to the notch 320 of the third cap 32, causing a corresponding rotation of the rod 40 and forcing the blade 72 to respond. It causes a rotation to cut the curve.

The blade 72 can be fitted into the head 70 by injection molding.

Referring to FIG. 4, the blade 72 has two longitudinal sides and a cutting edge 73 terminating at a cutting point 74. The cutting edge 73 “strips” the longitudinal (parallel) sides at an angle, that is, not vertically, so that the inner angle θ1 defined by the cutting point 74 is an acute angle. .. The cutting edge 73 has an acute angle θ2 with the object plane 160. The cutting edge 73 is substantially transverse to the axis of the rod 40, thereby forming a radius R between the cutting point 74 and the axis of the rod 40.

Although the present invention has been described in relation to its preferred embodiments, upon reading this specification, various modifications will be apparent to those skilled in the art. Therefore, the invention disclosed herein includes all modifications that belong to the contents of the section of the claims of utility model.

[0025]

[Effect of the device]

 As described above, according to the universal knife of the present invention, by operating the switching button means, the blade arranged on the head rotates in the rotatable mode with respect to the barrel, and the blade moves relative to the barrel. Since it can be switched to the non-rotatable mode that does not rotate, the curve can be easily cut.

[Brief description of drawings]

FIG. 1 is a perspective view of a universal knife of the present invention.

FIG. 2 is an exploded view of FIG.

FIG. 3 is a sectional view showing a state in which the universal knife according to the present invention is functioning in a non-rotatable mode.

FIG. 4 is a sectional view showing a state in which the universal knife according to the present invention functions in a rotatable mode.

[Explanation of symbols]

10 ... Barrel, 11 ... Upper end, 12 ... Lower end, 13
... upper cap, 20 ... switching button means, 23 ... contact rod, 30 ... bearing means, 31 ... first tube, 3
2 ... 3rd cap, 33 ... 2nd tube, 34 ... 1st spring, 35 ... Shoulder part, 40 ... Rod, 41 ... Tip part, 42 ...
Groove, 43 ... C-shaped ring, 45 ... Engaging end portion, 50 ... Lower cap, 51 ... First engaging surface, 60 ... Connector means, 61
... second engaging surface, 62 ... plug end, 63 ... first socket, 70 ... head, 71 ... second socket, 72 ... blade, 73 ... cutting edge, 74 ... cutting point, 320 ... notch, R
…radius.

Claims (6)

[Scope of utility model registration request] 1. A universal knife capable of switching between a non-rotatable mode that cuts a straight line and a rotatable mode that cuts a curve, the barrel having an upper end and a lower end, and the upper end of the barrel. Section and the lower end, each having an upper cap and a lower cap each having a passage in the center, and a contact rod, and being securely received by the upper end of the barrel, It has a switching button means for positioning and arranging in the upper stable position or the lower stable position, and a third cap engaged with the first tube, and is slidably received by the switching button means, and the third cap is the switching button. A bearing means abutting the contact rod of the means; a second tube that positively engages the first tube to form a shoulder therebetween; The second tube has a first spring that surrounds the second tube and has both ends abutting against the shoulder portion and the lower cap, respectively, and a tip portion and an engaging end portion, and is rotatable but not slippery. Received in the first tube and the second tube, the tip end abutting the third cap, the engagement end projecting out of the lower cap through the passage, and A rod that is connected to the connector means; and a head that has a second socket for engaging the connector means at one end and a blade is arranged at the other end, and the contact rod is The connector means engages the lower cap to cause the blade to function in a non-rotatable mode when remaining in the upper stable position, and the connector when the contact rod is in the lower stable position. Stage away from the lower cap, and the rod constitutes the rotation axis of the head, the utility knife, characterized in that to function the blade in a rotatable mode. 2. The lower cap has a first engagement surface,
2. The connector according to claim 1, wherein the connector has a second engagement surface, and the first engagement surface and the second engagement surface engage with each other when the blade is in the rotatable mode. All-purpose knife described. 3. The first connector means holds the engaging end portion of the rod in engagement with a central portion of the second engaging surface.
The universal knife according to claim 2, further comprising a socket, and a plug end portion on an opposite surface of the socket that engages with the second socket of the head. 4. The rod has a groove near its tip that receives a C-shaped ring, the ring being received inside the first tube and at the upper end of the second tube. The universal knife of claim 1, wherein the abutment limits the rod to a fixed relative position with respect to the second tube. 5. The third cap of claim 1, wherein the third cap has a notch to limit rotation of the tip of the rod therein when in the blade rotatable mode. Universal knife. 6. The blade has a sloping cutting edge with a cutting point at its end, the cutting edge being substantially transverse to the axis of the rod so that The universal knife according to claim 1, wherein a radius is formed between the rod and the axis.