JP3180992U - Pencil sharpener - Google Patents

Abstract

Provided is a manual pencil sharpener that can be operated safely and easily even by young people.
A case 110 having a pencil insertion hole 112, an operation handle 120 disposed in the case 110 so as to be rotationally driven, and capable of rotating in a forward direction in which the pencil is cut and in a direction opposite to the forward direction. A pencil having a cutting unit 150 that revolves the rotating cutting blade 151 while rotating around the tip of the pencil by rotating the operation handle 120 in the positive direction, and cuts the tip of the pencil inserted from the pencil insertion hole. In the sharpener, when the operation handle 120 is rotated in the forward direction, the pencil is fed toward the rotary cutting blade, and when rotated in the reverse direction, the pencil feeding mechanism 130 is fed to the pencil insertion hole and the piece member 171 Is adjusted by the cam cylinder of the adjustment knob member 180 to adjust the cutting length of the pencil lead, and by pressing the adjustment knob member 180, the piece member 171 is held down. And a core adjustment mechanism 170 for discharging the lead L breakage is moved.
[Selection] Figure 1

Description

  The present invention relates to a pencil sharpener, and more particularly to a pencil sharpener that can be operated safely and easily even by young people.

Conventionally, the followings are known as pencil sharpeners for manually cutting a pencil. This pencil sharpener revolves around a rotating cutting blade with a spiral blade in the case and rotates around the tip of the inserted pencil by driving the rotating cutting blade with an operating handle. Is cut into a conical shape (see Patent Document 1 and Patent Document 2).
See JP-A-8-300894 See Japanese Utility Model Publication No. 4-50292.

  Since such a pencil sharpener is used by young people such as lower elementary school children, it is necessary to take various safety measures. In other words, when cutting a pencil, do not provide a mechanism for pinching fingers, make it possible to adjust the length of the lead so that the sharpened pencil does not become too sharp, and even bend inside the pencil sharpener It is desirable to provide a structure that does not require the cutting blade to be taken out when removing the broken core.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a pencil sharpener that can be operated safely and easily even by a young person.

  The device according to claim 1, which solves the above-mentioned problem, is arranged in a case provided with a pencil insertion hole, in a rotationally driveable manner in the case, in a forward direction for cutting, and in a reverse direction opposite to the forward direction. A rotatable operation handle, a rotary cutting blade arranged around the tip of the pencil inserted from the pencil insertion hole, and the rotation cutting blade around the tip of the pencil by rotating the operation handle in the positive direction And a cutting mechanism that cuts the tip of the pencil inserted through the pencil insertion hole, and is disposed inside the case and does not rotate the inserted pencil. The pencil is sent to the rotary cutting blade by the rotation of the operation handle in the forward direction, and from the pencil insertion hole by the rotation of the operation handle in the reverse direction. A pencil feeding mechanism for feeding the entered pencil toward the pencil insertion hole, and disposed at a position facing the tip of the pencil inserted from the pencil insertion hole, and disposed coaxially with the inserted pencil. A core length adjusting mechanism comprising: a piece member that determines the position of the tip of the pencil; and a piece position changing mechanism that changes the arrangement position of the piece member and sets the length of the pencil lead that has been cut. A pencil sharpener comprising: a folding core discharging mechanism that moves the piece member to the pencil insertion hole side from a position where the piece member can be moved by the piece position changing mechanism and pushes out the broken core.

  According to the present invention, with the pencil feeding mechanism arranged in the case, the pencil inserted in the pencil insertion hole can be sent to the rotary cutting blade by rotating the operation handle in the forward direction when cutting the pencil. It is possible to omit a pencil feeding device that is arranged outside the case and may pinch fingers, thereby improving safety. Further, according to the present invention, the length and sharpness of the pencil lead can be easily adjusted by the lead length adjusting mechanism, so that the pencil lead can be kept from being sharpened more than necessary. Furthermore, according to the present invention, the broken core can be discharged with one touch. For this reason, the opportunity that a rotary cutting blade etc. are taken out from a case, or a finger touches the rotary cutting blade in a case can be decreased as much as possible, and safety can be improved.

Similarly, the invention according to claim 2 is the pencil sharpener according to claim 1, wherein the pencil feeding mechanism is rotationally driven by the operation handle and can penetrate the pencil inserted from the pencil insertion hole. In order to come into contact with the disk member provided with the pencil through hole and the pencil inserted into the pencil insertion hole, they are arranged in parallel with a predetermined distance therebetween with the pencil inserted in the pencil insertion hole interposed therebetween. A first roller member that contacts the disk member and a second roller member that rotates in a direction opposite to the first roller member are provided.
According to the present invention, it is possible to feed the pencil by driving the first roller and the second roller with the disk member rotated by the operation handle.

Similarly, the invention according to claim 3 is the pencil sharpener according to claim 2, wherein the disk member of the pencil feeding mechanism is an end surface on the side where the first roller member and the second roller member are arranged. A plurality of protrusions protruding toward the first roller member and the second roller member, and contacting the protrusions of the disk member at one end in the rotation axis direction of the first roller member A first radial protrusion, and an end of the second roller member opposite to a side where the radial protrusion is provided on the first roller member of the second roller member. And a second radial projection in contact with the second projection.
According to the present invention, the pencil feeding mechanism can be configured with a simple mechanism, and the pencil can be reliably fed.

Similarly, the invention according to claim 4 is the pencil sharpener according to claim 2 or 3, wherein the first roller member and the second roller member of the pencil feeding mechanism are inserted into the pencil insertion hole. The indentation part which followed the external shape of the said pencil was formed.
According to this invention, a pencil is pinched | interposed between the hollow part of the said 1st roller member and the said 2nd roller member, and is sent reliably.

Similarly, the invention according to claim 5 is the pencil sharpener according to any one of claims 1 to 4, wherein the piece position changing mechanism of the core length adjusting mechanism is a rotation shaft of the operation handle. And an elastic member that pushes the piece member and the adjustment knob member toward the outer side in the rotation axis direction of the operation handle. A cam portion that contacts an end of the piece member opposite to the pencil side and changes the position of the piece member by a rotation operation of the adjustment knob member is provided.
According to the present invention, the pencil lead length can be easily adjusted by rotating the adjustment knob member.

Similarly, the invention according to claim 6 is the pencil sharpener according to claim 5, wherein the cam portion of the lead length adjusting mechanism has a longest position of the piece member, and the longest lead length of the pencil after cutting. To a plurality of positions from the shortest to the shortest.
According to the present invention, the pencil lead length can be easily selected from a plurality of predetermined lengths.

Similarly, the invention according to claim 7 is the pencil sharpener according to claim 5 or claim 6, wherein the folding core discharge mechanism is disposed inside the adjustment knob and extends along the rotation axis of the operation handle. It is characterized by comprising a piece member that is held movably.
According to the present invention, the folding core can be easily discharged simply by operating the adjustment knob and moving the piece member within the holding portion.

  According to the present invention, it is possible to provide a manual pencil sharpener that can be operated safely and easily even by a young person.

It is sectional drawing which shows schematic structure of the pencil sharpener which concerns on embodiment of this invention. It is a perspective view which shows the cutting part of the pencil sharpener. The cutting part is shown, (a) is a top view, (b) is sectional drawing equivalent to the AA line in (a). The configuration of the pencil feeding mechanism of the pencil sharpener is shown, (a) is a schematic view corresponding to a side view, (b) is a schematic view seen from the D direction in (a), (c) is ( It is the schematic diagram seen from the E direction in a). It shows the piece member used for the core length adjuster mechanism of the pencil sharpener, (a) is a front view, (b) is a plan view, and (c) is a CC line in (a). FIG. The adjustment knob member used for the core length adjuster mechanism of the pencil sharpener is shown, (a) is a front view, (b) is a plan view, and (c) is a front view depicting a cam portion. . The cam cylinder of the adjustment knob member is shown, (a) is a sectional view of the knob member, and (b) is a development view of the cam cylinder. FIG. 2 shows a cap member of a concentric length adjusting mechanism, (a) is a front view, (b) is a plan view, and (c) is a cross-sectional view corresponding to the line BB in (b). The operation | movement of the pencil sharpener is shown, (a), (b) is a schematic diagram which shows the adjustment state of a core length, (c) is a schematic diagram which shows a broken core discharge | emission state.

  A pencil sharpener according to a mode for carrying out the present invention (hereinafter simply referred to as an embodiment) will be described.

  First, the overall configuration of a pencil sharpener according to an embodiment of the present invention will be described. FIG. 1 is a sectional view showing the overall structure of a pencil sharpener according to an embodiment of the present invention. The pencil sharpener 100 includes a case 110 made of synthetic resin. On the pencil insertion side 111 (left side in FIG. 1) of the case 110, a pencil insertion hole 112 for inserting a pencil is provided, and a shaving box 113 for storing pencil shavings is detachably disposed. . An operation handle 120 is disposed on the handle side surface 114 (the right side surface in FIG. 1), which is the other surface of the case 110, so as to be rotatable about the axis OO. Further, in the case 110, a pencil feeding mechanism 130 driven by the operation handle 120 and a cutting unit 150 which is also a cutting mechanism driven by the operation handle 120 are arranged.

  The pencil feeding mechanism 130 holds the pencil P so as not to rotate, and feeds the pencil P. That is, when the operation handle 120 is rotated in a predetermined direction (clockwise as viewed from the handle side surface 114 side: rotated in the forward direction), the pencil feeding mechanism 130 moves the pencil P inserted from the pencil insertion hole 112 of the case 110. Send to cutting unit 150 side. Further, when the operation handle 120 is rotated in the opposite direction (counterclockwise when viewed from the handle side surface 114 side: rotated in the opposite direction), the pencil P inserted from the pencil insertion hole 112 of the case 110 is moved to the pencil insertion hole 112 side. Send to.

  FIG. 2 is a perspective view showing a cutting part of the pencil sharpener, FIG. 3 shows the cutting part, (a) is a plan view, and (b) corresponds to the AA line in (a). It is sectional drawing. The cutting unit 150 includes a rotary cutting blade 151 having a helical blade (not shown) formed on the outer periphery. When the operation handle 120 is rotated in the forward direction, the rotary cutting blade 151 revolves around the tip of the pencil P and revolves around the axis O2-O2, and the tip of the pencil P is conical. To cut. On the other hand, when the operation handle 120 is rotated in the reverse direction, the rotary cutting blade 151 is rotated while revolving in the reverse direction. At this time, in addition to the pencil feeding mechanism 130 feeding the pencil P in the direction of the pencil insertion hole 112, the rotary cutting blade 151 does not cut the pencil P because the spiral blade does not contact the pencil P in the cutting direction.

  Further, the cutting unit 150 includes a core length adjusting mechanism that sets the length of the core of the pencil P inserted from the pencil insertion hole 112 and a broken core discharging mechanism that pushes out the broken core. In this embodiment, the core length adjusting mechanism and the broken core discharging mechanism are integrally configured and arranged as a core adjusting mechanism 170 as will be described later.

  The cutting unit 150 includes a rotating unit 160 disposed coaxially with the axis OO of the operation handle 120. The rotating part 160 includes a cylindrical part 162 having a through-hole 164 into which the pencil P is inserted, a conical holder part 161 that is disposed on the handle side surface 114 side of the cylindrical part 162 and that arranges the tip of the pencil P, and a holder part. 161, a cylindrical part 162, and a holding part 166 that rotatably holds the connection part 163 with the operation handle 120. An opening 165 is formed on the side surface of the holder portion 161 so as to face the rotary cutting blade 151, and the pencil P can be cut with the rotary cutting blade 151. In addition, a connection portion 163 that is connected to the pencil feeding mechanism 130 and transmits the rotation of the operation handle 120 is formed on the side of the pencil insertion side 111 of the cylindrical portion 162.

  As shown in FIGS. 2 and 3, the rotary cutting blade 151 has its axis O <b> 2-O <b> 2 arranged in a twisted position with respect to the axis OO of the operation handle 120. Is formed with a gear 152. The gear 152 meshes with an internal gear 153 disposed on the handle side surface 114 side of the case 110 to constitute a planetary gear mechanism. For this reason, when the operation handle 120 is rotated in the forward direction, the rotary cutting blade 151 rotates around the axis O2-O2 while revolving around the axis OO together with the holder part 161, and the opening of the holder part 161 The tip of the pencil exposed from 165 is cut into a conical shape with helical teeth.

  Next, the pencil feeding mechanism 130 will be described. 4A and 4B show a configuration of a pencil feeding mechanism of the pencil sharpener, wherein FIG. 4A is a schematic view corresponding to a side view, FIG. 4B is a schematic view viewed from the D direction in FIG. ) Is a schematic view seen from the E direction in (a).

  The pencil feeding mechanism 130 is disposed on the side of the pencil insertion side 111 inside the case 110. The pencil feeding mechanism 130 is connected to the connecting portion 163 of the rotating portion 160 and rotated and driven, and two roller members disposed between the disc member 131 and the pencil insertion side surface 111, that is, One roller member 140A and a second roller member 140B are provided. The first roller member 140A is held by a bearing member 135 (see FIG. 1) fixed to the inside of the case 110 so as to be rotatable about the axis OA-OA. Similarly, the 2nd roller member 140B is hold | maintained at the bearing member 135, and is hold | maintained rotatably about the axis | shaft OB-OB. The shaft OA-OA and the shaft OB-OB are arranged so as to be parallel to each other along the vertical direction, and sandwich the shaft OO of the operation handle 120.

  That is, the first roller member 140A and the second roller member 140B are spaced apart from each other by a predetermined distance in the vertical direction with the pencil penetrating the pencil insertion hole interposed therebetween so as to contact the pencil P inserted from the pencil insertion hole 112. Arranged parallel to each other.

  The disk member 131 is provided with a connection hole 133 at the center thereof where the connection part 163 of the rotating part 160 is inserted and connected. As a result, the disk member 131 rotates in the forward direction and the reverse direction by rotating the operation handle 120 in the forward direction and rotating in the reverse direction. The connection hole 133 is a hole through which the pencil P inserted from the pencil insertion hole 112 passes, and serves as a pencil through hole.

  On the circumference of the side surface 111 of the pencil insertion side 111 of the disc member 131, a plurality of, in this example, four protrusions 132 projecting toward the first roller member 140A and the second roller member 140B are formed. The circumference where the protrusion 132 is disposed is centered on the axis of the disk member 131.

  140 A of 1st roller members are equipped with the hollow part 142A in the upper and lower center position in the location corresponded to the pencil insertion hole 112 of the cylindrical member 141A, and the protrusion part of the disk member 131 at the lower end which is one end of the cylindrical member 141A. First radial protrusions 143 </ b> A in contact with 132 are provided. Further, on the first radial protrusion 143A, for example, eight blade members 144A that are in contact with the protrusion 132 when the disk member 131 is driven to rotate are formed radially. A shaft portion 145A held by the bearing member 135 is formed at the lower end of the first radial protrusion 143A. Furthermore, a cylindrical extension portion 146A and a shaft portion 147A are formed at the upper end, which is the other end of the cylindrical member 141A.

  The second roller member 140B corresponds to the first roller member 140A arranged upside down. That is, the second roller member 140B is provided with a concave portion 142B at the upper and lower central positions at a position corresponding to the pencil insertion hole 112 of the cylindrical member 141B, and the protrusion of the disk member 131 at the upper end that is one end of the cylindrical member 141B. The second radial protrusion 143B that contacts the portion 132 is provided. Further, for example, eight blade members 144B that come into contact with the protrusion 132 when the disk member 131 is driven to rotate are formed radially on the second radial protrusion 143B. A shaft portion 145B that is held by the bearing member 135 is formed at the upper end of the second radial protrusion 143B. Further, a cylindrical extension portion 146B and a shaft portion 147B are formed at the lower end which is the other end of the cylindrical member 141B. Note that the number of blade members 144B and 144B can be changed as appropriate, such as ten.

  In the pencil feeding mechanism 130 configured as described above, the pencil P is held between the indented portions 142A and 142B of the first roller member 140A and the second roller member 140B (see FIG. 4B), and the pencil is inserted. The pencil P inserted from the hole 112 is fixed so as not to rotate. Further, when the disc member 131 is rotated in the forward direction by the operation handle 120 (solid line arrow in FIG. 4), the pencil P is sent toward the rotary cutting blade 151 (solid line arrow). On the other hand, when the disk member 131 is rotated in the opposite direction (the broken line arrow), the pencil P inserted from the pencil insertion hole 112 is sent toward the pencil insertion hole 112 (the broken line arrow).

  Therefore, in the pencil sharpener 100 according to the embodiment, when cutting the pencil P, when the pencil P is inserted from the pencil insertion hole 112 and the operation handle 120 is rotated in the forward direction, the first roller member 140A of the pencil feeding mechanism 130 is obtained. The pencil P can be sent in the direction of cutting with the rotary cutting blade 151 while the pencil P is held not to rotate with the second roller member 140B. At this time, the pencil P is held on its peripheral surface by the indented portion 142A of the first roller member 140A and the indented portion 142B of the second roller member 140B, and the rotation is reliably prevented. Further, the operation handle 120 is sent in the forward direction by rotation.

  When the pencil P is sharpened and the pencil P is removed from the pencil sharpener 100, when the operation handle 120 is rotated in the reverse direction, the pencil P is pushed out of the pencil insertion hole 112 by the pencil feeding mechanism 130, and the pencil P is easily removed. Can be taken out from the pencil sharpener 100. Therefore, it is possible to omit a pencil feeding device that is arranged outside the case and may pinch fingers, thereby improving safety.

  Next, the lead length adjusting mechanism and the broken lead removing mechanism will be described. In the pencil sharpener 100 according to the embodiment of the present invention, the lead length adjusting mechanism and the broken lead discharging mechanism are arranged as a lead adjusting mechanism 170 having both functions.

  The lead adjusting mechanism 170 is in contact with the tip of the pencil disposed on the holder portion 161 to determine the position of the pencil P, and a spring that presses the piece member 171 toward the outside of the rotation shaft of the operation handle 120. A member 172, an adjustment knob member 180 in which a cam cylinder 183 that sets the position of the piece member 171 is formed, and a cap member 190 that rotatably holds the adjustment knob member 180 on the operation handle are configured. . Here, the spring member 172, the adjustment knob member 180, and the cap member 190 constitute a piece position adjustment mechanism.

  In the core adjustment mechanism 170, the adjustment knob member 180 is attached so as to be rotatable around an axis O1-O1 above the axis OO of the operation handle 120, and the adjustment knob member 180 is rotated integrally with the cap member 190. By doing so, the position of the piece member 171 is moved to adjust the length and sharpness of the core to be cut. The lead adjusting mechanism 170 also feeds the piece member 171 by pushing the adjusting knob member 180 provided with the cam cylinder 183 toward the pencil insertion hole 112, and discharges the broken lead.

  First, the piece member 171 will be described. FIG. 5 shows a piece member used for the core length adjuster mechanism of the pencil sharpener, wherein (a) is a front view, (b) is a plan view, and (c) is a C- in FIG. It is sectional drawing equivalent to a C line. The piece member 171 is a rod-shaped member including a positioning surface 171a, a cam contact portion 171b, a flange portion 171c, and an elastic claw portion 171d. The positioning surface 171a is arranged on the side of the pencil insertion side 111, which is one side surface, and determines the position of the pencil P relative to the rotary cutting blade 151 by contacting the core of the cut pencil P. The cam contact portion 171 b contacts the cam cylinder 183 of the adjustment knob member 180. The flange portion 171c is disposed around the piece member 171 and is in contact with a spring member 172 that presses the piece member 171 against the handle side surface 114 side. The elastic claw portion 171d is disposed in the long hole 166a of the holding portion 166 and restricts the movement range of the piece member 171 (see FIG. 3B).

  Next, the adjustment knob member 180 will be described. 6A and 6B show an adjustment knob member of the pencil sharpener, wherein FIG. 6A is a front view, FIG. 6B is a plan view, FIG. 7C is a front view depicting a cam portion, and FIG. The cam cylinder of this is shown, (a) is a development view of the cam cylinder, and (b) is a sectional view of the knob member.

  The adjustment knob member 180 includes a base portion 181 having a large diameter and a knob portion 182 having a smaller diameter than the base portion 181. In addition, the inside of the base portion 181 is hollow and includes a cam cylinder 183 having an end surface as a cam surface. The base portion 181 is formed with two groove portions 184 and 185 having different width dimensions. The groove portions 184 and 185 are provided to hold the adjustment knob member 180 with respect to the cap member 190 so as to be slidable and non-rotatable along the axis O1-O1.

  As shown in FIG. 7B, the cam cylinder 183 changes its height in five stages of h1, h2, h3, h4, and h5 in one round (360 °). By rotating the adjustment knob member 180 about the axis O1-O1, the position of the piece member 171 pressed against the cam cylinder 183 side by the spring member 172 is changed.

  Next, the cap member 190 will be described. 8A and 8B show a cap member of the concentric length adjusting mechanism, where FIG. 8A is a front view, FIG. 8B is a plan view, and FIG. 8C is a cross-sectional view corresponding to line BB in FIG. It is. The cap member 190 includes a cylindrical holding portion 191 in which the adjustment knob member 180 is disposed, and an overhang portion that contacts the base portion 181 of the adjustment knob member 180 and prevents the adjustment knob member 180 from coming off to the handle side surface 114 side. 192. Further, a knurled notch 193 for preventing slip is formed on the outer periphery of the holding portion 191, and convex portions 194 and 195 having different width dimensions entering the groove portions 184 and 185 of the adjustment knob member 180 are formed inside the holding portion 191. Forming.

  The cap member 190 is rotatably attached to the operation handle 120, and holds the adjustment knob member 180 in a state where the cap member 190 cannot rotate and is slidable along the axis O1-O1. For this reason, the adjustment knob member 180 can rotate about the axis O1-O1 together with the cap member 190. Further, the adjustment knob member 180 can slide in the cap member 190 toward the pencil insertion side surface 111 along the axis O1-O1.

  Further, the numbers “1” to “5” are described as the heights h1 to h5 of the cam cylinder 183 in which the piece member 171 is in contact with the outer periphery of the cap member 190, and the cover member 200 covering the outer periphery of the cap member 190 is provided. By displaying from the hole part 210 (see FIG. 3), the core length to be cut can be displayed.

  Next, the operation of the lead adjusting mechanism 170 will be described. FIGS. 9A and 9B show the operation of the pencil sharpener. FIGS. 9A and 9B are schematic views showing the adjustment state of the lead length, and FIG. 9C is a schematic view showing the broken lead discharge state. In order to adjust the lead length of the pencil P to be cut by the lead adjusting mechanism 170, the cap member 190 is rotated integrally with the adjustment knob member 180, and the position of the cam cylinder 183 where the cam contact portion 171b of the piece member 171 contacts. To change.

  When cutting with a sharp core, the adjustment knob member 180 is rotated integrally with the cap member 190 so that the cam cylinder 183 contacts the piece member 171 at the height h5 (FIG. 7B). . Then, as shown in FIG. 9A, the piece member 171 is pressed by the spring member 172 and moves to the handle side surface 114 side. In this state, the number “5” is displayed in the hole 210 of the cover member 200.

  When the operation handle 120 is rotated in the forward direction, the pencil P is pressed against the handle side surface 114 by the pencil feeding mechanism 130 and is cut by the rotary cutting blade 151. At this time, the core of the pencil P is in a long and sharp state and comes into contact with the positioning surface 171a of the piece member 171. For this reason, the core of the pencil P can be cut into a long and sharp state.

  On the other hand, when cutting without sharply sharpening the core, the adjustment knob member 180 is rotated so that the cam cylinder 183 contacts the piece member 171 at the height h1 (FIG. 7B). Then, the piece member 171 moves to the side of the pencil insertion side 111 while being pressed by the spring member 172 as shown in FIG. 9B. In this state, the number “1” is displayed in the hole 210 of the cover member 200.

  When the operation handle 120 is rotated in the forward direction, the pencil P is pressed against the handle side surface 114 by the pencil feeding mechanism 130 and is cut by the rotary cutting blade 151. At this time, the core of the pencil P comes into contact with the positioning surface 171a of the piece member 171 in a state where it is not short and sharp, and cutting cannot be performed. For this reason, the core of the pencil P can be cut short and not sharp.

  Similarly, if the adjustment knob member 180 is rotated so that the positioning surface 171a comes into contact with the heights h2, h3, and h4 of the cam cylinder 183, the position of the piece member 171 is changed, and the core of the pencil P is changed. The length and the pointed state can be made as desired. FIG. 7B shows a pencil cutting state corresponding to the heights h1 to h5 of the cam cylinder.

  Further, when the lead of the pencil P is broken, the adjustment knob member 180 is pushed toward the pencil insertion side surface 111 side. Then, as shown in FIG. 9C, the adjustment knob member 180 moves in the cap member 190 toward the pencil insertion side surface 111, and the piece member 171 in contact with the cam cylinder 183 is resisted against the spring member 172. It sends to the pencil insertion side 111 side and pushes out the broken core L remaining in the holder part 161.

  As described above, according to the pencil sharpener 100 according to the embodiment, when cutting a pencil, it is necessary not to provide a mechanism for pinching fingers, or to reduce the length of the lead so that the sharpened pencil does not become too sharp. It is possible to make adjustments, and even when removing the broken core inside the pencil sharpener, it has a configuration that does not require the cutting blade to be taken out, and even a young person can operate it safely and easily.

100: Pencil sharpener 110: Case 111: Pencil insertion side 112: Pencil insertion hole 113: Sharpening box 114: Handle side 120: Operation handle 130: Pencil feed mechanism 131: Disk member 132: Protrusion 133: Connection hole 135 : Bearing member 140A: first roller member 140B: second roller member 141A: cylindrical member 141B: cylindrical member 142A: recessed portion 142B: recessed portion 143A: first radial protrusion 143B: second radial protrusion 144A: blade member 144B : Blade member 145A: shaft portion 145B: shaft portion 146A: extension portion 146B: extension portion 147A: shaft portion 147B: shaft portion 150: cutting portion 151: rotating cutting blade 152: gear 153: internal gear 160: rotating portion 161: Holder part 162: Tube part 163: Connection part 164: Through hole 165: Opening part 166: Holding 166a: long hole 170: core adjustment mechanism (core length adjusting mechanism, bending lead discharge mechanism)
171: Piece member 171a: Positioning surface 171b: Cam contact portion 171c: Gutter portion 171d: Elastic claw portion 172: Spring member 180: Adjustment knob member 181: Base portion 182: Knob portion 183: Cam cylinder (cam portion)
184, 185: Groove portion 190: Cap member 191: Holding portion 192: Overhang portion 193: Knurled notch portion 194, 195: Convex portion 200: Cover member 210: Hole L: Core P: Pencil

Claims (7)

A case with a pencil insertion hole;
An operation handle that is rotatably arranged in the case and is rotatable in a forward direction for cutting and in a direction opposite to the forward direction;
A rotary cutting blade disposed around the tip of the pencil inserted from the pencil insertion hole;
A cutting mechanism for revolving the rotary cutting blade while rotating around the tip of the pencil by rotating the operation handle in the positive direction, and cutting the tip of the pencil inserted from the pencil insertion hole;
In a pencil sharpener equipped with
The pencil placed inside the case is fixed so as not to rotate, and the pencil is sent toward the rotary cutting blade by rotating the operation handle in the forward direction. A pencil feeding mechanism for feeding the pencil inserted from the pencil insertion hole by rotating in the reverse direction toward the pencil insertion hole;
A piece member arranged at a position facing the tip of the pencil inserted from the pencil insertion hole, coaxially arranged with the inserted pencil and defining the position of the tip of the pencil, and an arrangement position of the piece member A lead length adjusting mechanism comprising a piece position changing mechanism for changing and setting the length of the pencil lead that has been sharpened,
A fold core discharging mechanism for moving the piece member to the pencil insertion hole side rather than a position where the piece position changing mechanism can be moved, and pushing out the fold core;
A pencil sharpener characterized by comprising.   The pencil feeding mechanism is a disk member provided with a pencil through-hole that can be rotationally driven by the operation handle and through which the pencil inserted from the pencil insertion hole can be disposed, and the pencil inserted into the pencil insertion hole A first roller member that contacts the disc member, and a first roller member that is arranged in parallel with a predetermined distance between the pencil inserted in the pencil insertion hole, The pencil sharpener according to claim 1, further comprising a second roller member that rotates in a reverse direction. The disk member of the pencil feeding mechanism has a plurality of protrusions projecting toward the first roller member and the second roller member on the circumference of the end surface on the side where the first roller member and the second roller member are arranged. With protrusions of
The first roller member includes a first radial protrusion that contacts the protrusion of the disk member at one end of the rotation axis direction of the first roller member
A second radial protrusion that contacts the protrusion of the disk member is provided at an end of the second roller member in the rotational axis direction opposite to the side where the radial protrusion is provided on the first roller member. The pencil sharpener according to claim 2, wherein the pencil sharpener is provided.   4. The indented portion along the outer shape of the pencil inserted into the pencil insertion hole is formed in the first roller member and the second roller member of the pencil feeding mechanism. 5. Pencil sharpener as described in 1. The piece position changing mechanism of the lead length adjusting mechanism is arranged along the rotation axis of the operation handle, and can be rotated, and the piece member and the adjustment knob member are arranged in the direction of the rotation axis of the operation handle. An elastic member that pushes out toward the outside of the
The adjustment knob member includes a cam portion that contacts an end of the piece member opposite to the pencil side and changes a position of the piece member by a rotation operation of the adjustment knob member. The pencil sharpener according to any one of claims 1 to 4.   The said cam part of the said core length adjustment mechanism sets the position of the said piece member to the several position from the longest to the shortest core length of the pencil after cutting. Pencil sharpener.   The said broken core discharge | emission mechanism is arrange | positioned inside the said adjustment knob, and is provided with the piece member hold | maintained so that a movement along the rotating shaft of the said operation handle is comprised, The structure of Claim 5 or Claim 6 characterized by the above-mentioned. The pencil sharpener described.