CN111836728A - pencil sharpener - Google Patents

Abstract

The invention provides a pencil sharpener, which can simply and reliably set the sharpening angle of a pencil to an optimal angle suitable for the hardness of a pencil lead. The pencil sharpener has a holding portion that allows a pencil to be inserted along an insertion axis, and a rotary blade portion that is provided at an inclination angle set with respect to the pencil insertion axis while driving a leading end portion of the pencil by rotation of a handle. A pencil sharpener that cuts a tip end portion of a pencil at a set cutting angle, the pencil sharpener including a blade holding member that holds the rotary blade portion in a tiltable manner in the holding portion at a certain tilt angle around a tilt axis set in the holding portion; an elastic member that applies a biasing force in the direction in which the inclination angle increases to the rotary blade portion; a blade angle holding member for holding an inclination angle of the rotary blade at a predetermined angle; an angle determining means capable of determining the inclination angle of the rotary blade portion based on the cutting angle corresponding to the hardness of the pencil lead.

Description

pencil sharpener

technical field

The present invention relates to a pencil sharpener for use on a desk, which is capable of selecting the cutting angle of a pencil.

Background technique

Pencil sharpeners commonly used on desks have a function to select the sharpness of the pencil lead. This kind of pencil sharpener is in contact with the front end of the pencil lead, and the pencil lead position determination part is provided on the inner side of the rotary knife part of the pencil sharpener, and the position can be changed to determine the insertion position of the pencil relative to the rotary knife part, thereby determining the position of the pencil sharpener. The sharpness of the pencil lead.

But when sharpening a pencil, we want to be able to choose the cutting angle of the pencil shaft in addition to adjusting the sharpness of the pencil lead.

That is, the pencil leads used by children in the lower grades of elementary school are soft (eg, 2B-4B), and moreover, they write strongly. Therefore, in order to prevent breakage of the pencil lead, a pencil with a larger cutting angle (for example, 26 degrees) than that of commonly used pencils (for example, hardness H, HB, B, etc.) is desired.

Furthermore, since colored pencils have a softer lead strength than regular pencils, it is desirable for colored pencils to have larger cutting angles (eg, 35 degrees).

Therefore, as a pencil sharpener used on a desk, a pencil sharpener capable of setting the cutting angle to an optimum angle according to the application and the type of pencil is required as compared with the past.

Patent Document 1 discloses a pencil sharpener capable of changing the cutting angle of a pencil, and the inclination of the cutting roller can be changed by supporting one end of the shaft of the cutting roller by a wedge which can be freely moved in and out.

【Existing technical documents】

Patent Document 1: Utility Model Publication No. 38-23952

SUMMARY OF THE INVENTION

Invention to solve problem

Although the pencil sharpener described in Patent Document 1 can change the cutting angle of the pencil rod, the set cutting angle is difficult to understand, and it is difficult to set the optimum cutting angle according to the type and hardness of the pencil.

In order to solve the above problems, the present invention provides a pencil sharpener capable of easily and reliably specifying the cutting angle of the pencil shaft as an optimum angle according to the hardness of the pencil lead.

way of solving the problem

In order to solve the above-mentioned problems, claim 1 of the present invention provides a pencil sharpener having a holding part and a rotating blade part, the holding part allowing the pencil to be inserted along the shaft insertion shaft, and the rotating blade part The tip of the pencil is driven to rotate by rotating the handle at a set inclination angle relative to the shaft insertion shaft, and the pencil sharpener cuts the tip of the pencil at the set cutting angle. The pencil sharpener has a blade holding member, and the blade holding member holds the rotating blade portion on the holding portion so as to be tiltable at a certain inclination angle around a tilting axis, and the tilting axis is provided on the holding portion. on the holding portion; an elastic member that applies a biasing force in the direction of increasing the inclination angle to the rotating blade portion; a blade angle holding member that adjusts the rotation of the rotating blade portion The inclination angle is maintained at a certain angle; and the angle determination part is capable of determining the inclination angle of the rotary blade portion based on a cutting angle suitable for the hardness of the pencil lead.

Here, the "lead hardness" of a pencil includes hardnesses (H, HB, B, etc.) specified in the JIS standard, and lead hardness of colored pencils that are softer than normal pencils.

According to the present invention, when sharpening a pencil, the rotary blade is held to be tiltable about the tilting axis, and the biasing force is applied in a direction in which the angle of inclination increases by the elastic member. In addition, the blade holding member is in contact with the blade angle holding member to maintain the inclination angle of the rotary blade at a constant angle. The angle determination means determines the inclination angle of the rotary blade portion based on the cutting angle suitable for the hardness of the pencil lead.

Therefore, the angle of the rotary blade relative to the shaft insertion shaft can be selected and set simply by operating the blade angle holding member, and the optimum angle for cutting the pencil can be easily and accurately determined according to the type or application of the pencil.

The invention described in claim 2 is the pencil sharpener according to claim 1, wherein the blade angle holding member has an angle holding inner surface that is a rotation surface of the blade holding member , the rotating surface is along the insertion axis of the pen holder, and has different radii with the insertion axis as the axis; the blade holding part has a rotating part, and the angle of the rotating part and the angle maintaining part of the blade part is maintained The inner surface contacts and rotates; the angle determination member rotates around the pen holder insertion shaft, so that the blade angle maintaining member moves back and forth along the pen holder insertion shaft direction.

According to the present invention, the angle of the blade holding member is determined by the radius of the angle holding inner surface, and the rotating member of the blade holding member rotates in contact with the inner surface. Since the angle-holding inner surface has rotating surfaces with different radii around the insertion axis, the revolution radius of the rotating member of the blade-holding member can be set by the angle-determining member moving the blade angle-holding member back and forth along the pen barrel insertion axis, That is, the inclination angle of the blade holding member can be set. Therefore, by rotating the operation angle determination member, it is possible to simply and reliably designate an optimum angle for sharpening the pencil according to the type or use of the pencil.

Also, the present invention of claim 3 is the pencil sharpener according to claim 2, wherein the blade angle holding member is formed in a cylindrical shape, the angle holding inner surfaces have different radii, and the The inner surface consists of a plurality of short cylinder inner surfaces and a conical inner surface, the short cylinder inner surfaces are arranged at a certain interval along the direction of the pen barrel insertion axis, and the conical inner surface is arranged between the short cylinder inner surfaces. and connected to the inner surface of the short cylinder, the inner surface of the conical shape has different radii.

According to the present invention, since the angle maintaining inner surface has the plurality of short cylindrical inner surfaces and the conical inner surface connected to the short cylindrical inner surfaces, it is possible to move the blade angle maintaining member back and forth along the pen barrel insertion shaft by the angle determining member, rotating The rotating member selects the inner surface of the short cylinder, sets the revolution radius of the rotating member of the blade holding member, and sets the inclination angle of the blade holding member. In addition, when the rotating member moves back and forth from the inner surface of one short cylinder to the inner surface of the other short cylinders, the conical inner surface formed by connecting the inner surfaces of the short cylinders also moves at the same time. Therefore, when changing the tilt angle, the movement in the front and rear directions becomes easier.

Therefore, by rotating the operation angle determining member, the inclination angle suitable for the pencil hardness can be specified in steps, and further, when the step selection is performed, the rotation movement of the rotating member can be smoothly performed by operating the angle determining member.

The invention described in claim 4 and the pencil sharpener according to claim 2 are characterized in that the angle retaining inner surface of the blade angle retaining member has a conical inner surface, and the conical inner surface is The radius varies linearly along the barrel insertion axis.

According to the present invention, the angle-maintaining inner surface has a conical inner surface, the radius of which varies linearly along the insertion axis of the pen barrel, so that the angle-maintaining member of the blade portion moves linearly along the insertion axis by the angle-determining member, and the conical inner surface is selected by rotating the rotating member , that is, by selecting different radii, the revolution radius of the rotating part of the blade holding part, that is, the inclination angle of the blade holding part, can be set.

Therefore, by rotating the operation angle determination member, the inclination angle suitable for the pencil hardness can be easily and continuously specified.

The invention described in claim 5 is characterized in that the pencil sharpener according to any one of claims 2 to 4, wherein the blade angle holding member has a protruding portion on the outer peripheral surface, and the angle determines The member is formed as a cylinder having a diameter larger than that of the blade angle holding member so as to be rotatably driven from the outside of the pencil sharpener to cover the outer side of the blade angle holding member, and the angle determination member has a cam groove, When the protrusion of the blade angle holding member is inserted and the angle determination member is rotated, the blade angle holding member can be moved back and forth.

According to the present invention, the angle determining member has a cylindrical shape with a diameter larger than that of the blade angle holding member, can be driven to rotate from the outside of the pencil sharpener, and covers the outer side of the blade angle holding member, and is provided with a cam groove. When the protrusion of the holding member is inserted and the angle determining member is rotated, the blade angle holding member is moved back and forth. Therefore, by rotating the angle determination member, the protrusion inserted into the cam groove is moved in the front-rear direction, and the blade angle holding member is moved in the front-rear direction accordingly.

Then, as the blade angle holding member moves, the angle of the blade holding member also changes. Therefore, the cutting angle of the pencil can be changed by a simple operation of rotating the angle determination part.

The invention described in claim 6 is characterized in that the angle determination member has a rotary dial, and the rotary dial is provided at a position where the pencil sharpener is inserted into the pencil. side, on the rotary dial, displays the shape of the cut corner of the selected pencil as an icon for the pencil image.

According to the present invention, the angle determination part is used to determine the cutting angle of the pencil, and has a rotary dial provided on the side of the pencil sharpener where the pencil is inserted. The rotary dial displays the shape of the cut corner of the selected pencil as an icon. Therefore, by confirming the displayed icon and operating the rotary dial, the angle determination member is rotated to operate the blade angle holding member. Thereby, the angle of the blade holding member is determined.

Therefore, the cutting angle of the setting pencil can be changed by a simple and easy operation such as rotating the rotary dial by the display icon for confirming the cutting angle.

The invention described in claim 7, the pencil sharpener according to claim 5, is characterized in that a knob member is provided on the pencil sharpener, and the knob member is protruded from the upper surface of the pencil sharpener, for rotationally driving the angle determination member.

According to the present invention, the angle determination member has a knob member for rotationally driving the angle determination member. Therefore, by rotating the knob rotation angle determination member, the protrusion inserted into the cam groove is moved in the front-rear direction, and the blade angle holding member is also moved in the front-rear direction. In addition, the angle of the blade holding member changes with the movement of the blade angle holding member. Therefore, the cutting angle of the pencil can be changed with a simple and easy operation such as turning the knob.

The present invention according to claim 8 is the pencil sharpener according to claim 5, wherein the angle determination member has a fulcrum and an operating lever member, and the fulcrum is provided on one end side of the pencil sharpener body. The operating lever member uses the other end of the pencil sharpener body as a force point, moves along the insertion shaft between the force point and the fulcrum, and linearly moves the blade angle maintaining member.

According to the present invention, the angle determining member includes the lever member that maintains the angle of the blade between the fulcrum and the action point with one end side of the pencil sharpener body serving as a fulcrum and the other end side serving as a fulcrum. The part moves linearly along the insertion axis. Therefore, when the operation lever member is operated, the protrusion inserted into the cam groove is moved in the front-rear direction, and the blade angle holding member is also moved in the front-rear direction. Furthermore, as the blade angle holding member moves, the angle of the blade holding member determined by the blade angle holding member also changes. Therefore, the cutting angle of the pencil can be changed by a simple and easy operation such as rotating the lever member.

The invention described in claim 9 is characterized in that the pencil sharpener according to claim 1, wherein the blade angle holding member includes a plate cam that is in contact with the pencil of the blade holding member. The side opposite to the insertion side is in contact, and the plate cam can change the angle of inclination of the blade angle holding member and the insertion shaft of the rotary blade; the angle determination member is provided on the pencil sharpener The dial of the handle shaft portion of the device can be rotated to drive the plate cam.

According to the present invention, the blade angle holding member has a plate cam that is in contact with the side opposite to the insertion side of the pencil of the blade holding member to change the inclination angle, the plate cam being rotationally driven by the dial, The dial is provided on the shaft portion of the handle of the pencil sharpener.

When the dial is operated to rotate the plate cam, the contact position between the plate cam and the blade holding member is changed to set the angle of the blade holding member. Therefore, the cutting angle of the pencil can be changed by a simple and easy operation such as rotating the dial.

The invention of claim 10, the pencil sharpener according to claim 1, is characterized in that, the pencil sharpener drives the pencil to rotate through the handle, and the rotary blade rotates on its own, so that the The pencil is rotated relative to the rotating blade to cut the pencil. The pencil sharpener is provided with the blade angle holding member and the angle determination member as position changing means to fix the position of the blade angle holding member at a desired position.

According to the present invention, the rotary blade is rotated by the handle, and the pencil is rotated by the handle. The blade angle holding member and the angle determining member are provided as position changing means to fix the position of the blade angle holding member at a desired position.

According to the invention described in claim 10, since the rotary blade does not revolve, it is not necessary to maintain and determine the angle of the rotary blade over the entire circumference. The structure of the blade angle holding member and the angle determining member can be simplified as a position changing device.

Invention effect

According to the pencil sharpener of the present invention, the cutting angle of the pencil cutting portion can be determined simply and reliably according to the type of pencil and the hardness of the lead.

According to the pencil sharpener according to claim 1, when sharpening a pencil, the rotary blade is held to be tiltable about the tilting axis, and a biasing force is applied in a direction in which the angle of inclination increases by the elastic member. In addition, the blade holding member is in contact with the blade angle holding member, and maintains the inclination angle of the rotary blade at a constant angle. Then, the angle determination means determines the inclination angle of the above-mentioned rotary blade based on the cutting angle suitable for the hardness of the pencil lead.

Therefore, the angle of the rotary blade relative to the shaft insertion shaft can be selected and set simply by operating the blade angle holding member, and the optimum angle for cutting the pencil can be easily and accurately determined according to the type or application of the pencil.

According to the pencil sharpener of claim 2, the angle of the blade holding member is determined by the radius of the inner surface of the angle holding member, and the rotating member of the blade holding member is rotated in contact with the inner surface. Since the angle-holding inner surface has rotating surfaces with different radii around the insertion axis, the revolving radius of the rotating member of the blade-holding member can be set by the angle-determining member moving the blade angle-holding member back and forth along the barrel insertion axis, That is, the angle of inclination of the blade holding part.

Therefore, by rotating the operation angle determination member, it is possible to simply and reliably determine the most suitable angle for the hardness of the pencil lead to cut the pencil according to the type or use of the pencil.

According to the pencil sharpener according to claim 3, since the inner surface of the angle maintaining member has a plurality of short cylindrical inner surfaces and the conical inner surface connected to the short cylindrical inner surfaces, it is possible to make the angle of the blade portion by the angle determining member The holding member moves back and forth along the insertion shaft of the pen, and turning the rotating member to select the inner surface of the short cylinder can set the revolution radius of the rotating member of the blade holding member, that is, the inclination angle of the blade holding member. In addition, when the rotating member moves back and forth from the inner surface of one short cylinder to the inner surface of the other short cylinders, the conical inner surface formed by connecting the inner surfaces of the short cylinders also changes at the same time.

Therefore, when the tilt angle is changed, the movement in the front and rear directions becomes easier. Therefore, by rotating the operation angle determination member, it is easy to specify the inclination angle suitable for the pencil hardness in steps, and further, the rotation of the rotating member can be smoothly performed by the operation angle determination member when the step selection is performed.

The pencil sharpener according to claim 4, wherein the angle-maintaining inner surface has a conical inner surface, and the radius of the inner surface varies linearly along the shaft insertion axis, so that the blade angle retaining member moves linearly along the shaft insertion axis through the angle-determining member, through Rotating the rotating member selects the position of the conical inner surface, that is, the radius, so that the revolution radius of the rotating member of the blade-holding member, that is, the inclination angle of the blade-holding member, can be set.

Therefore, by rotating the operation angle determination member, it is possible to easily and continuously set the inclination angle in accordance with the hardness of the pencil lead.

The pencil sharpener according to claim 5, wherein the angle determination member has a cylindrical shape with a diameter larger than that of the blade angle holding member, is rotatably driven from the outside of the pencil sharpener, and covers the outside of the blade angle holding member, the angle The determining member is provided with a cam groove, and when the protrusion of the blade angle retaining member is inserted to rotate the angle determining member, the cam groove moves the blade angle retaining member back and forth. Therefore, by rotating the angle determination member, the protrusion inserted into the cam groove moves in the front-rear direction, and accordingly, the blade angle maintaining member moves in the front-rear direction.

Then, as the blade angle holding member moves, the angle of the blade holding member determined by the blade angle holding member also changes. Therefore, the cutting angle of the pencil can be changed by a simple operation of rotating the angle determination part.

The pencil sharpener according to claim 6, wherein the angle determination part is used for determining the cutting angle of the pencil, and has a rotary dial provided on the side where the pencil sharpener is inserted into the pencil. On the rotary dial, the shape of the cut corner of the selected pencil is displayed as the icon of the pencil image. Therefore, by confirming the displayed icon and operating the rotary dial, the angle determination member is rotated to operate the blade angle holding member. Thereby, the angle of the blade holding member is determined.

Therefore, it is possible to change the cutting angle of the setting pencil by a simple and easy operation such as checking the icon showing the cutting angle and rotating the rotary dial.

The pencil sharpener according to claim 7, wherein the angle determination member has a knob member for rotationally driving the angle determination member. Therefore, when the angle determination member is rotated by the knob, the protrusion inserted into the cam groove is moved in the front-rear direction, and the blade angle holding member is also moved in the front-rear direction. Furthermore, the angle of the blade holding member changes with the movement of the blade angle holding member. Therefore, the cutting angle of the pencil can be changed with a simple and easy operation such as turning the knob.

The pencil sharpener according to claim 8, wherein the angle determination member further includes an operating lever member, the operating lever member having one end provided on the pencil sharpener body as a fulcrum and the other end as an action point, between the fulcrum and the action point , so that the blade angle maintaining part moves linearly along the insertion axis. Therefore, when the operation lever member is operated, the protrusion inserted into the cam groove moves in the front-rear direction, and the blade angle holding member also moves in the front-rear direction. And with the movement of the blade angle holding member, the angle of the blade holding member also changes. Therefore, the cutting angle of the pencil can be changed by a simple and easy operation such as rotating the lever member.

The pencil sharpener according to claim 9, wherein the blade angle holding member has a plate cam that contacts the side opposite to the insertion side of the pencil of the blade holding member to change the inclination angle, the plate cam The cam is rotationally driven by a dial provided on the shaft portion of the handle of the pencil sharpener.

When the plate cam is rotated by operating the dial, the contact position between the plate cam and the blade holding member is changed to set the angle of the blade holding member. Therefore, the cutting angle of the pencil can be changed by a simple and easy operation such as rotating the dial.

According to the pencil sharpener of claim 10, since the rotary blade does not revolve, it is not necessary to maintain and determine the angle of the rotary blade over the entire circumference. The structure of the blade angle holding member and the angle determining member can be simplified as a position changing device.

Description of drawings

1 shows the appearance of the pencil sharpener according to the first embodiment of the present invention, (a) is a front view, (b) is a side view, (c) is a back view, and (d) is a plan view.

Figure 2 shows the internal structure of the cutting part of the same pencil sharpener, (a) is an internal structure diagram with a cutting angle of 20 degrees, (b) is an internal structure diagram with a cutting angle of 26 degrees, (c) is a cutting angle of 35-degree internal structure diagram, (i) is a front view of the dial, and (ii) is a longitudinal sectional view of FIG. 1( a ) showing an internal state.

Fig. 3 is a cross-sectional view showing the internal structure of the same pencil sharpener.

Figure 4 shows the setting state of the cutting angle of the same pencil sharpener, (a) is the internal perspective view of the pencil sharpener when the cutting angle is 20 degrees, (b) is the cutting angle of 26 degrees, the pencil sharpener Internal perspective view, (c) is the internal perspective view of the pencil sharpener when the cutting angle is 35 degrees.

Figure 5 shows the setting state of the cutting angle of the same pencil sharpener, (a) is a cross-sectional view of the internal state when the cutting angle is 35 degrees, (b) is a cross-sectional view of the internal state when the cutting angle is 26 degrees, ( c) is a sectional view of the internal state when the cutting angle is 20 degrees.

6 shows pencil sharpeners according to other embodiments of the present invention, (a) is a partial front view of the pencil sharpener of the second embodiment, (b) is a longitudinal sectional view of the pencil sharpener of the second embodiment, (c) ) is a longitudinal sectional view of the pencil sharpener of the third embodiment.

7 shows the appearance of the pencil sharpener according to other embodiments of the present invention, (a) is a longitudinal sectional view of the pencil sharpener according to the fourth embodiment, and (b) is a longitudinal sectional view of the pencil sharpener according to the fifth embodiment.

8 shows the appearance of the pencil sharpener according to other embodiments of the present invention, (a) is a longitudinal sectional view of the pencil sharpener according to the sixth embodiment, and (b) is a longitudinal sectional view of the pencil sharpener according to the seventh embodiment , (c) shows a front view of one example of a cam, and (d) shows a front view of another example of a cam.

Fig. 9 shows a pencil sharpener according to an eighth embodiment of the present invention, (a) is a longitudinal sectional view of the pencil sharpener, and (b) is a perspective view of the device part of the same pencil sharpener.

FIG. 10 shows a schematic diagram of a pencil cutting state.

Detailed ways

Next, the pencil sharpener of the present invention will be described according to specific embodiments of the present invention.

first embodiment

The pencil sharpener according to the first embodiment of the present invention will be described below. Fig. 1 shows the external appearance of the pencil sharpener according to the first embodiment of the present invention, (a) is a front view, (b) is a side view, (c) is a rear view, and (d) is a plan view.

First, the appearance of the pencil sharpener (10) will be described. As shown in Figure 1, the pencil sharpener (10) is composed of a main body (11), a rotary dial (12) for determining the cutting angle on the main body (11), a pencil insertion hole (13), a handle (14) and A pencil shavings box (15) is formed. The main body (11) is composed of a front part (11A) and a rear part (11B).

The rotary dial (12) is provided with a pair of display windows (16), (17) for identifying the pencil icon and the hardness of the pen on the main body (11) located on the back, which indicate the degree of cutting. In addition, the rotary dial (12) A direction display part (18) is also provided on the upper part for displaying the rotation position of the rotary dial (12). In addition, the shapes of the rotary dial (12), the display windows (16), (17) and the direction indicating part (18) are not limited to the description of this embodiment, and other shapes and designs may be used.

As shown in FIG. 10 , in the pencil sharpener (10) of the present embodiment, pencils are classified into three categories: pencils with a core hardness of HB-2B are suitable for pencils with a cutting angle of 20 degrees and a core hardness of 2B-4B , suitable for cutting angle of 26 degrees, refill hardness 6B or colored pencils, suitable for cutting angle of 35 degrees.

Therefore, as shown in Figures (2) and (3), in order to be able to select the cutting angle of the pencil, the pencil sharpener (10) of this embodiment has a cutting device (20) and a conveying device (70) for the pencil P, so The conveying device (70) holds the pencil P inserted into the insertion hole (13) in the rotation direction and conveys it in the cutting direction. In the pencil sharpener (10) according to the present embodiment, the configuration of the conveying device (70) is well known and has the same configuration as that of a general pencil sharpener.

Figure 2 shows the internal structure of the same pencil sharpener, (a) is the internal structure diagram with a cutting angle of 20 degrees, (b) is an internal structure diagram with a cutting angle of 26 degrees, and (c) is a cutting angle of 35 degrees. In addition, (i) is a front view showing the dial, and (ii) is a longitudinal sectional view of FIG. 1(a) showing the internal state. Fig. 3 is a cross-sectional view of the internal structure of the same pencil sharpener. Figure 4 shows the setting state of the cutting angle of the same pencil sharpener, (a) is the internal perspective view of the pencil sharpener when the cutting angle is 20 degrees, (b) is the cutting angle of 26 degrees, the pencil sharpener Internal perspective view, (c) is the internal perspective view of the pencil sharpener when the cutting angle is 35 degrees. Figure 5 shows the setting state of the cutting angle of the same pencil sharpener, (a) is a cross-sectional view of the internal state when the cutting angle is 35 degrees, (b) is a cross-sectional view of the internal state when the cutting angle is 26 degrees, ( c) is a sectional view of the internal state when the cutting angle is 20 degrees.

As shown in Figures (3) and (5), the cutting device (20) has a rotating blade part (21), a blade holding member (22), a holding part (23), an elastic member (24), and has the function of an angle determining member The first cylindrical member (40) and the second cylindrical member (50) having the function of the blade angle maintaining member.

In this embodiment, the first cylindrical member (40) can be rotationally driven by an external rotary dial (12), and has a cam groove (43) on the side wall portion (42). The second cylindrical member (50) is provided in the first cylindrical member (40), and has a protrusion (58) that fits into the cam groove (43). When the first cylindrical member (40) is rotationally driven, the second cylindrical member (50) moves back and forth along the insertion shaft OP to change the angle of the blade holding member (22) relative to the insertion shaft OP, the blade holding member (22) In contact with the angle hold inner surface (50A).

The handle gear (60) rotates to drive the rotary blade (21), the rotary blade (21) rotates relative to the front end of the pencil P, and the handle gear (60) is driven by the rotary handle (14). The rotary blade portion (21) has known helical teeth, and the rotary blade portion (21) rotates and cuts the pencil while revolving around the pencil P.

The blade holding member (22) rotatably holds the rotary blade portion (21). In addition, the blade holding member (22) moves up and down around the tilting axis O to change the angle formed by the blade holding member (22), that is, the rotating blade portion (21) and the insertion axis OP, and the tilting axis O is set at the blade on the holding part (22).

Further, by driving the rotary handle (14), the blade holding member (22) revolves around the pencil P, and the pencil P is held by the holding portion (23). This device is well known. The blade holding member (22) has a rotating shaft holding portion (22A) that holds a shaft (26) of a rotating member (25) composed of a roller member. In the present embodiment, the revolving radius of the rotating member (25) is determined by the contact position with the angle-maintaining inner surface (50A) of the second cylindrical member (50) to be described later, thereby setting the rotational blade (21) relative to the Insert the inclination angle of the axis OP.

The elastic member (24) applies rotational pressure (clockwise force in the figure) as a biasing force in a direction in which the inclination angle of the blade holding member (22) and the insertion shaft OP increases. The blade holding member (22) holds the rotating blade portion (21). In this embodiment, a screw spring is used as the elastic member (24).

Next, the first cylindrical member (40) will be described. As shown in Figures 2 and 3, the diameter of the first cylindrical member (40) is larger than that of the second cylindrical member (50). The first cylindrical member (40) includes a bottom portion (41) and a side wall portion (42). The first cylindrical member (40) is connected to the rotary dial (12) through the connecting member (31) at the bottom (41), so when the rotary dial (12) is rotated, the first cylindrical member (40) is also rotated drive. The rotary dial (12) constitutes the angle determination part.

Two cam grooves, a cam groove (43) and another cam groove (43) are formed at the side wall portion (42) of the first cylindrical member (40). The cam groove (43) and the other cam groove (43) are engaged with the protruding portion (58), which is formed to be described later, to make the second cylindrical member (50) move linearly (forward and backward) along the insertion axis OP. The outer peripheral surface of the second cylindrical member (50). The cam groove (43) and the other cam groove (43) are inclined with respect to the generatrix of the first cylindrical member (40), and are formed at symmetrical positions about the insertion axis OP as an axis. By rotating the first cylindrical member (40), the protrusion (58) of the second cylindrical member (50) engaged therewith is driven in the front-rear direction, thereby moving the second cylindrical member (50) in the front-rear direction .

Next, the second cylindrical member (50) will be described. As shown in FIGS. 2 and 4, in the second cylindrical member (50), the angle-holding inner surface (50A) is in contact with the rotating member (25) of the above-mentioned blade holding member (22), and rotates the blade portion (21) ) is maintained at the specified angle.

The second cylindrical member (50) is provided so as to be able to move only forward and backward, and a protrusion (58) and another protrusion (58) are formed on the outer peripheral surface, and the protrusion (58) and the other protrusion (58) are respectively fitted In the cam groove (43) of the first cylindrical member (40) and the other cam groove (43). By rotating the first cylindrical member (40), the second cylindrical member (50) moves in the front-rear direction along the insertion axis OP.

The second cylindrical member (50) is provided along the insertion axis OP. The second cylindrical member (50) has an angle-maintaining inner surface (50A) formed as a rotating surface with an axis of the insertion axis OP having different radii along the insertion axis OP. In addition, the above-mentioned two protruding parts, a protruding part (58) and another protruding part (58) are protruded and formed on the outer side of the second cylindrical member (50).

There are also two guide protrusions (56) on the second cylindrical member (50), and the two guide protrusions (56) are embedded on the two sets of guide rails (19), (19) to prohibit the second cylindrical member (50). ) rotation, only the second cylindrical member (50) is allowed to move linearly along the insertion axis OP. The guide rails (19) are oppositely formed inside the body (11).

In this embodiment, as shown in FIG. 3, the angle maintaining inner surface (50A) has a plurality of inner peripheries with different radii, and in this embodiment, there are three short cylindrical inner surfaces (51), (52) , (53) and two conical inner surfaces (54), (55). The conical inner surfaces (54), (55) connect the short cylindrical inner surfaces (51), (52), (53). Through the operation of the rotary dial (12) and the first cylindrical member (40), the rotating member (25) keeps the short cylindrical inner surfaces (51), (52), (53) of the inner surface (50A) at an angle The set inner surface turns.

In this embodiment, when the rotating member (25) is in contact with the inner surface of the short cylinder (51), the cutting angle is 20 degrees. Similarly, when the rotating member (25) is in contact with the inner surface (52) of the short cylinder, The cutting angle is 26 degrees, and when the rotating part (25) is in contact with the inner surface (53) of the short cylinder, the cutting angle is 35 degrees. In addition, other constituent members having a roller member may be used as the rotating member, for example, a rollable spherical member or the like may be used.

Next, the rotary dial (12) will be described. As shown in Figures 1 and 2, the rotary dial (12) has a display window (16), a display window (17) and a direction indicating portion (18). In the present embodiment, the display window (16) and the display window (17) are open so that the icons, characters, etc. recorded on the dial substrate (30) can be recognized, and the dial substrate (30) is formed on the surface of the rotary dial (12). back.

On the dial substrate (30), three icons (pencil images) in the state of pencil cutting as shown in FIG. 10 can be observed through the display window (16). In addition, on the dial substrate (30), the lead hardness characters ("HB-2B", "2B-4B", "6B-color pencils") as shown in Fig. 10 can be observed through the display window (17). In addition, on the upper surface of the main body (11), a sharpened pencil icon is displayed at the position indicated by the direction indicator (18). In addition, the shapes of the rotary dial (12), the display window (16), the display window (17) and the direction indicating portion (18) can be appropriately changed as required.

As shown in Figure (2a), when the direction indicating portion (18) of the rotary dial (12) is upward and set to 20 degrees, the pencil sharpener (10) is set to sharpen pencils with a cutting angle of 20 degrees. At this time, the pencil icon shown in Figure (10a) is displayed on the display window (16), and the display window (17) displays that the appropriate pencil hardness is (HB-2B). Similarly, when the rotary dial (12) is rotated to the state of Fig. (2b), the icon of 26 degrees is displayed and the matching pencil icon and refill hardness are (2B-4B), when in Fig. (2c) In the state, the icon of 35 degrees and the hardness of the refill (6B-colored pencil) are displayed. Also, the shape and content of these icons or characters can be changed as needed.

Therefore, in addition to the position of the direction display part (18) and the icon on the main body (11) displayed on the direction display part (18), the user can also use the icon observed by the display window (16), the display window (17) ) observed pen core hardness grasps the current cutting state of the pencil sharpener (10).

Next, the action of the pencil sharpener (10) of the first embodiment will be described. First, the user can select the cutting state of the pencil according to the type of the pencil, the hardness of the pencil lead, or the use state. When the hardness is HB-2B, the cutting angle is preferably 20 degrees, when the hardness of the refill is 2B-4B, the cutting angle is preferably 26 degrees, and when the hardness of the refill is 6B or above or a colored pencil is used, the cutting angle is preferably 35 degrees Spend. In addition, when the user is a child of a lower grade of elementary school, it is desirable to increase the cutting angle.

As shown in Figure 2, Figure 4 and Figure 5, by rotating the rotary dial (12), the cutting angle can be set to a desired angle. The user identifies the position of the direction indicating portion (18) of the rotary dial (12), the icon on the main body (11) indicated by the direction indicating portion (18), the icon displayed on the display window (16), and the display window (17) Displays the pencil lead hardness to choose the cutting angle of the pencil.

As shown in FIGS. 2, 4 and 5, when the rotary dial (12) is rotated, the first cylindrical member (40) rotates with the rotation of the rotary dial (12). Therefore, the cam groove (43) of the first cylindrical member (40) rotates to guide the protrusion (58) of the second cylindrical member (50). At this time, since the second cylindrical member (50) can only move along the insertion axis OP, the second cylindrical member (50) moves back and forth along the insertion axis OP at a predetermined position.

Then, the rotary dial (12) can be rotated from any angle to hold the inner surface (50A) to a specified position, and the rotary member (25) of the blade holding member (22) can be in contact with the inner surface of the rotary dial (12) at the specified position , for example in contact with the short cylinder inner surface (51). In addition, if the rotation of the rotary dial (12) drives the handle (14) to rotate, the movement of the rotating member (25) on the angle-maintaining inner surface (50A) will be easier.

In this state, the blade holding part (22) has a specified angle with respect to the insertion shaft OP, the pencil is inserted into the insertion hole (13), held by the holding part (23), and when the handle (14) is rotated, the pencil P is conveyed by The device (70) is conveyed while cutting the pencil at an angle specified by the rotary blade (21).

Next, the effect of the pencil sharpener (10) will be described. According to the pencil sharpener (10) of the present embodiment, the cutting angle suitable for the hardness of the pen core can be specified simply by rotating the dial (12).

In the cutting device (20), since the rotary blade portion (21) is reliably held by the angle maintaining inner surface (50A) of the rotating member (25) of the blade holding member (22) and the second cylindrical member (50), therefore, The rotating blade (21) does not shake and can stably cut the pencil.

In addition, in the above-mentioned embodiment, the number of the short cylindrical inner surfaces of the angle maintaining inner surface (50A) is set to three, of course, the number may be set to two or four or more.

Second Embodiment

Fig. 6(a) is a partial front view of the pencil sharpener of the second embodiment, and (b) is a cross-sectional view of the pencil sharpener of the second embodiment. Next, the pencil sharpener (110) according to the second embodiment of the present invention will be described. The pencil sharpener (110) of the present embodiment has a knob member (111), the knob member (111) is an angle determination member for rotationally driving the first cylindrical member (40), and is provided protrudingly on the pencil sharpener (110). ) on the upper surface of the body (11).

Since other configurations are the same as those of the pencil sharpener of the first embodiment, the same components are denoted by the same reference numerals and omitted.

According to the pencil sharpener ( 110 ) of the present embodiment, since the number of components can be reduced and the structure can be simplified, a pencil sharpener can be provided at low cost, which can set the cutting angle easily and stably.

Third Embodiment

Fig. 6(c) is a cross-sectional view of the pencil sharpener of the third embodiment. In the pencil sharpener (120) of the present embodiment, the angle maintaining inner surface (50A) of the second cylindrical member (50) is the blade angle maintaining member, and the angle maintaining inner surface (50A) is the conical inner surface (121) ), whose inner surface radius varies linearly along the insertion axis OP. Since other configurations are the same as those of the pencil sharpener of the first embodiment, the same components are denoted by the same reference numerals and omitted.

According to the pencil sharpener (120) of the present embodiment, the cutting angle of the rotary blade (21) relative to the insertion shaft OP can be set in a stepless and continuous manner so as to reach a desired angle matched with the hardness of the pen core, and the cutting angle of the rotary blade (21) can be continuously set in a stepless manner. Change the cutting angle of the pencil.

Fourth Embodiment

Fig. 7(a) is a cross-sectional view of the pencil sharpener of the fourth embodiment. The pencil sharpener (130) of the present embodiment has a sliding member (131), the sliding member (131) is an angle determination member, and is protrudingly provided on the upper surface of the main body (11) of the pencil sharpener (130), through the connecting member (132) is connected to the second cylindrical member (50), and moves the second cylindrical member (50) along the insertion axis OP. The pencil sharpener (130) does not have the rotary dial (12) or the first cylindrical member (40) of the pencil sharpener (10) of the first embodiment. Since other configurations are the same as those of the pencil sharpener (10) of the first embodiment, the same components are denoted by the same reference numerals and omitted.

According to the pencil sharpener (130) of the present embodiment, it is possible to provide a pencil sharpener that can simply and stably set the cutting angle at low cost.

Fifth Embodiment

Fig. 7(b) is a cross-sectional view of the pencil sharpener of the fifth embodiment. The pencil sharpener (140) of the present embodiment has an operation lever member (141) which is an angle determination member. The operating lever part (141) comprises a fulcrum (142) and a connecting part (143), the fulcrum (142) is arranged at one end of the main body (11) of the pencil sharpener, and the operating lever part (141) uses the other end as an operating force point, and when the operation is performed The force point and the fulcrum (142) are connected to a second cylindrical member (50) through a connecting portion (143), and the second cylindrical member (50) is a blade angle maintaining member. Thereby, the second cylindrical member (50) is linearly moved along the insertion axis OP. The present pencil sharpener (140) does not have the rotary dial (12) or the first cylindrical member (40) of the pencil sharpener (10) of the first embodiment. Since other configurations are the same as those of the pencil sharpener (10) of the first embodiment, the same components are denoted by the same reference numerals and omitted.

The pencil sharpener (140) of the present embodiment can simply and stably set the cutting angle with a small force using the lever member (141).

Sixth Embodiment

Fig. 8(a) is a cross-sectional view of the pencil sharpener of the sixth embodiment. The pencil sharpener (150) of the present embodiment has a second rotating member (151), and the second rotating member (151) is arranged at a position symmetrical with the rotating member (25) with the insertion axis OP as the axis of symmetry, and the rotating blade is installed One side of the blade part (22) of the part (21). The second rotating member (151) is rotatably provided at the front end of the arm member (152), the arm member (152) is tilted around the tilting axis O1, and with the movement of the second cylindrical member (50), the second rotating The part (151) rotates in contact with the angle-maintaining inner surface (50A).

Since the pencil sharpener (150) of the present embodiment has the second rotating member (151) arranged at the symmetrical position of the rotating member (25), it can be used without applying a biasing force to the second cylindrical member (50). The second cylindrical member (50) is stably driven.

Seventh Embodiment

Fig. 8(b) is a cross-sectional view of the pencil sharpener of the seventh embodiment. (c) A front view showing an example of a cam. The pencil sharpener (160) of this embodiment has a plate cam (161) and a selection dial (163). The plate cam (161) is a blade angle maintaining member, and the selection dial (163) is an angle determining member. The plate cam (161) is in contact with the rear end (162) of the blade holding member (22) on the side opposite to the insertion side of the pencil to change the inclination angle of the rotary blade (21) with respect to the insertion shaft OP. As shown in Fig. 8(c), the contour shape of the plate cam (161) has concave and convex sections that can change the angle of the rotating blade (21) in stages.

In addition, the angle determination member is constituted by a selection dial (163), which rotates and drives a plate cam (161) provided on the shaft portion (handle shaft portion) of the handle (14) of the pencil sharpener. ).

In the pencil sharpener (160) of the present embodiment, by operating the selector dial (163), the plate cam (161) is rotated, and the blade is changed by the contact position with the rear end portion (162) of the blade holding member (22). The angle of the holding member (22) relative to the insertion axis OP. Therefore, it is possible to change the cutting angle of the pencil according to the hardness of the lead by a simple and easy-to-understand operation such as rotating the selection dial (163).

In the above-mentioned embodiment, although the contour shape of the plate cam (161) has a stepped cam (step cam), as shown in FIG. On the other hand, a contour shape (stepless cam) that continuously changes the angle of the blade holding member (22).

Eighth Embodiment

Fig. 9 shows a pencil sharpener according to an eighth embodiment of the present invention, (a) is a cross-sectional view of the pencil sharpener, and (b) is a perspective view of a part of the same pencil sharpener device. In the pencil sharpener (170) of the present embodiment, the handle (14) is driven to rotate the pencil and at the same time the rotary blade (21) rotates. In addition, by changing the position of the blade holding member (22) by the position changing device (171), the inclination angle of the rotary blade portion (21) with respect to the insertion shaft OP is set.

The rotating device (180) has a first gear (181), an extension shaft (183), a second gear (184) and a third gear (185). The first gear (181) is driven to rotate by the handle (14), the extension shaft (183) rotates coaxially with the first gear (181), the second gear (184) is rotated and driven by the extension shaft (183), and the third gear (185) ) meshes with the second gear (184) to rotate the transfer device (70). The fourth gear (182) is meshed with the first gear (181) to rotate the rotary blade (21). With this device, by driving the handle (14), while the rotary blade (21) is rotated, the pencil P and the rotary blade (21) are relatively rotated to sharpen the pencil.

In addition, the pencil sharpener (170) has a position changing device (171), and the position changing device (171) is a blade angle holding member and an angle determining member. The position changing device (171) is in contact with the upper end of the blade holding member (22), and is set at a position perpendicular to the insertion axis OP (upper side in the figure). In addition, the angle of the blade holding member (22) and the insertion shaft OP is pressed in the opening direction by the elastic member (24).

The position changing device (171) is in contact with the upper side of the blade holding member (22) to determine the position of the blade holding member (22). The position changing device (171) consists of a rotary handle (172) and a transmission screw device (173).

In the pencil sharpener (170) of the present embodiment, since the rotary blade (21) does not revolve, it is not necessary to maintain and determine the angle of the rotary blade (21) over the entire circumference, and the position changing device (171) can be easily changed. ) as the blade angle maintaining part and the angle determining part.

possibility of industrial use

The pencil sharpener according to the present invention can freely and reliably designate the cutting angle of the pencil cutting portion according to the type or application of the pencil, and has the possibility of industrial application.

Symbol Mark Description

10 pencil sharpener

11 Ontology

11A Front Parts

11B Rear Parts

12 Rotary dial (angle determining part)

13 Insertion hole

14 handle

15 Pencil Scrap Box

16 Display window

17 Display window

18 Direction Display Section

19 Guide rail

20 Cutting device

21 Rotary knife

22 Blade Retaining Parts

22A Rotating shaft holding part

23 Retention Department

24 Elastic parts

25 Rotating parts

26 axes

30 Dial base plate

31 Connecting parts

40 The first cylinder member (angle determining member)

41 Bottom

42 side wall

43 Cam groove

50 Second cylindrical member (knife angle holding member)

50A angle hold inner surface

51 Short cylinder inner surface

52 Short cylinder inner surface

53 Short cylinder inner surface

54 Conical inner surface

55 Conical inner surface

56 Guide protrusion

58 Protrusions

60 handle gear

70 Teleporter

110 Pencil sharpener

111 Knob part (angle determination part)

120 Pencil sharpener

121 Conical inner surface

130 Pencil sharpener

131 Sliding part (angle determining part)

132 Connection parts

140 Pencil sharpener

141 Operation lever part (angle determination part)

142 pivots

143 Joints

150 pencil sharpener

151 Second rotating part

152 Arm parts

160 pencil sharpener

161 Plate cam (knife angle holding part)

162 rear end

163 Selection dial (angle determining part)

170 Pencil Sharpener

171 Position changing device (blade angle holding part, angle determining part)

172 Rotary handle

173 Transfer screw device

180 Rotary device

181 First gear

182 Fourth gear

183 Extension shaft

184 Second gear

185 Third gear

O Tilt axis

O1 Tilt axis

OP insert shaft

P pencil

Claims (10)

1. A pencil sharpener comprising a holding portion for inserting a pencil along an insertion shaft, and a rotating blade portion, wherein the rotating blade portion is set relative to the pencil insertion shaft The inclination angle is set, and at the same time, the front end of the pencil is driven by the rotation of the handle, and the front end of the pencil is cut through the set cutting angle; The pencil sharpener includes a blade holding member that tiltably holds the rotating blade portion on the holding portion at a predetermined inclination angle around a tilting axis set in the holding portion. ; an elastic member that applies a biasing force in the direction of increasing the inclination angle to the rotating blade; a blade angle maintaining member, the blade angle maintaining member maintains the inclination angle of the rotating blade at a certain angle; An angle determination unit capable of determining an inclination angle of the rotary blade portion based on a cutting angle suitable for the hardness of the pencil lead. 2 . The pencil sharpener according to claim 1 , wherein the blade angle maintaining member has an angle maintaining inner surface, and the angle maintaining inner surface is formed as a rotating surface along the insertion shaft. 3 . , with different radii around the insertion axis; the blade holding member has a rotating member that rotates in contact with the angle holding inner surface of the blade angle holding member; The angle determination member rotates around the insertion shaft to move the blade angle holding member back and forth in the direction of the insertion shaft. 3 . The pencil sharpener according to claim 2 , wherein the blade angle maintaining member is formed in a cylindrical shape, the angle maintaining inner surface has inner peripheries of different radii, and the angle maintaining inner surface is 3 . It consists of a plurality of short cylinder inner surfaces and a conical inner surface, the short cylinder inner surfaces are arranged at a certain interval along the insertion axis direction, and the conical inner surface is arranged between the short cylinder inner surfaces , connected to the inner surface of the short cylinder, the inner surface of the cone having different radii. 4. The pencil sharpener of claim 2, wherein the angle maintaining inner surface of the blade angle maintaining member has a conical inner surface having a radius along the insertion axis sexual changes. 5 . The pencil sharpener according to claim 2 , wherein the blade angle holding member has a protrusion on an outer peripheral surface, and the angle determination member has a larger diameter than the blade portion. 6 . The cylindrical shape of the angle holding member is rotatable from the outside of the pencil sharpener, and covers the outside of the blade angle holding member, the angle determining member has a cam groove, and when inserted into the blade angle holding member When the protruding portion is rotated, the blade angle maintaining member is moved back and forth when the angle determining member is rotated. 6 . The pencil sharpener according to claim 1 , wherein the angle determination member has a rotary dial, and the rotary dial is provided on a side where the pencil sharpener is inserted into the pencil, and on the side of the pencil sharpener. 7 . On the rotary dial, a pencil image representing the shape of the cut corner of the selected pencil is displayed as an icon. 7 . The pencil sharpener according to claim 5 , wherein the pencil sharpener has a knob member, and the knob member is protruded from the upper surface of the pencil sharpener to drive the angle determination member in rotation. 8 . 8 . The pencil sharpener according to claim 5 , wherein the angle determination member has a fulcrum and an operation lever member, the fulcrum is provided on one end side of the pencil sharpener body, and the operation lever member is 8 . Using the other end of the pencil sharpener body as a force point, the blade angle maintaining member is linearly moved along the insertion axis between the force point and the fulcrum. 9 . The pencil sharpener according to claim 1 , wherein the blade angle holding member has a plate cam that is in contact with a side opposite to the insertion side of the pencil of the blade holding member. 10 . , to change the inclination angle between the blade angle holding member and the insertion shaft of the rotary blade; the angle determination member is a dial set on the handle shaft of the pencil sharpener, so The dial can rotatably drive the plate cam. 10 . The pencil sharpener according to claim 1 , wherein the pencil is driven to rotate by the handle, and the rotary blade is rotated at the same time, so that the pencil is rotated relative to the rotary blade, 11 . In order to cut a pencil, the pencil sharpener is provided with the blade angle holding member and the angle determination member as position changing means to fix the position of the blade angle holding member at a desired position.

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