JP2007090625A - Pencil sharpener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pencil sharpener which is excellent in operability and enables a user to sharpen a pencil lead without feeling fatigue and in a playful mood. <P>SOLUTION: In the pencil sharpener 1, a sharpening part 23 is provided inside an implement body 4 having an opening 11 for insertion of the pencil 5. The sharpening part rotates, interlocking with a wheel 3 provided in the implement body 4, by the medium of a driving force transmission mechanism 33 composed of gears 28, 29, 30 and others made to engage with each other. By making the wheel 3 rotate by grasping the implement body 4 by one hand and by moving it on a desk or the like, the pencil 5 inserted from the opening 11 for insertion is subjected to lead sharpening by the sharpening part 23. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pencil sharpener.

  Pencil sharpeners include large electric drives that are placed on a desk or the like, manually driven ones that rotate a handle, and small ones that are carried mainly in a bag or pencil case and used in schools. .

  However, there is a risk of sharpening the pencil with the electric drive, and with the manual drive that rotates the handle, the handle is rotated by fixing it on the desk or holding the pencil sharpener with one hand. There is a problem that not only the user is easily tired but also the operability is not necessarily good (for example, Patent Documents 1 and 2).

  Further, in a small portable pencil sharpener, a conical pencil insertion hole having a taper that defines a pencil sharpening angle with respect to the axis of the pencil is generally formed inside a rectangular main body block. The pencil is centered by inserting the pencil into the pencil insertion hole and rotating it (Patent Document 3).

However, in such a pencil sharpener, the pencil is rotated while being held in a hand and pressed against the cutting blade, so that the pencil is sharpened.
Japanese Utility Model Publication No. 40-12254 Japanese Utility Model Publication No. 39-35199 JP-B-1-35760

  The present invention has been made to solve such a problem, and its technical problem is that it is excellent in operability, and the user does not feel tired and plays a pencil with a sense of fun. Is to provide a pencil sharpener.

The above-described problems are solved by the invention having the following configuration, as shown in each of the claims.
(1) A cutting part that rotates in conjunction with a wheel provided in the container is provided inside the container having a pencil insertion slot via a driving force transmission mechanism, and the pencil inserted from the insertion slot is inserted into the wheel. Is a pencil sharpener that is designed to sharpen the core at the cutting part.

  (2) In the above item (1), a pencil fixing portion is provided for preventing the rotation of the pencil and preventing the movement in the axial direction.

  (3) In the above item (1) or (2), the pencil fixing part and the cutting main body part for cutting the center of the fixed pencil are connected in the axial direction of the pencil. A cutting part including a cutting blade is incorporated in the case so as to be rotatable and reciprocally movable in the axial direction, and the cutting part is configured to be biased toward the pencil fixing part by a spring action.

  (4) In any one of the above items (1) to (3), an insertion hole in the axial direction is provided in the driving force transmission mechanism part, and the free end of the shaft protruding from the cutting part toward the insertion hole is provided. In addition to being inserted into the insertion hole, an axial groove is provided on the surface of the shaft, and a connecting pin fixed to a peripheral wall forming the insertion hole is slidably engaged with the groove, thereby cutting The part can be reciprocated in the axial direction within the cylindrical case.

  (5) In any of the above items (1) to (4), in the cylindrical case, a compression coil spring is projected from the cutting portion between the cylindrical end surface forming the insertion hole and the cutting portion. The cutting part is urged toward the pencil fixing part by being attached to the shaft.

  (6) In any one of the above items (2) to (5), the pencil fixing part is a clip type.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, a pencil is inserted from an insertion port provided in the container body, and the wheel is rotated by grasping the container body with one hand and moving it on a desk or the like, and a cutting unit interlocked with the wheel. Since the pencil is sharpened automatically, it is easier to use than the manual drive type that rotates the handle, and the user does not feel tired. You can sharpen. Moreover, since it is a manual type, there is no possibility of sharpening a pencil like an electric type.

  According to the second aspect of the invention, since the pencil is fixed by the fixing portion, it is not necessary to hold the pencil with one hand, and the operability is good.

  According to the third aspect of the present invention, after the pencil is fixed by the pencil fixing portion, the rotational driving force is transmitted to the cutting portion having the cutting blade only by grasping the body with one hand and moving it on the desk or the like. Because the cutting part is biased toward the pencil by the spring action, the pencil is automatically sharpened without pressing the pencil toward the cutting part, so it is easy to operate and fatigues the user. You can sharpen a pencil without feeling it.

  According to the invention described in claim 4, a mechanism in which the cutting portion rotates in conjunction with the wheel and the cutting portion can reciprocate in the axial direction within the cylindrical case has a relatively simple structure, and It can be obtained in a form that operates reliably.

  According to the fifth aspect of the present invention, the cutting portion is always pressed against the front end portion of the pencil by the action of the compression coil spring, so that the centering can be performed well without pressing the pencil forward. Can do.

  According to the sixth aspect of the present invention, since the fixing portion for fixing the pencil is a clip type that pressurizes and compresses from the outer periphery, it is easy to pressurize and depressurize the pencil, and the pencil can be easily detached.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
FIG. 1 is an overall perspective view of a first embodiment of a pencil sharpener according to the present invention, FIG. 2 is an exploded perspective view, FIG. 3 is a perspective view seeing through an internal mechanism, and FIGS. It is a principal part longitudinal cross-sectional view for demonstrating the operation state at the time of performing the centering of this.

  As shown in FIGS. 1 and 3, the pencil sharpener (1) of the present invention incorporates a mechanism for sharpening the pencil (5) into the body (4) having wheels (2) and (3). It is. The container (4) has a horizontally long semicircular shape when viewed from the side, and includes a container body (6) and a cover (7).

  The left and right small-diameter front wheels (2) and (2) connected by the axle (8) are connected to the front part of the vessel (4), and the left and right large-diameter rear parts connected to the axle (9) are connected to the rear part. Wheels (3) and (3) are respectively provided. A pencil for preventing the rotation of the pencil (5) and the movement of the pencil (5) in the axial direction between the front and rear wheels (2) and (3) of the right side plate (4a) of the body (4). A fixing part (10) is provided, and an insertion port (11) for the pencil (5) is provided in the pencil fixing part (10).

  As shown in FIG. 2, the pencil fixing part (10) includes a fixing part case (12) having an insertion hole (11) on the axis, and an annular elastic part (13) for elastically fixing the pencil (5). The clip (14) is provided in close contact with the outer periphery and pressurizes or depressurizes the annular elastic portion (13).

  The annular elastic portion (13) is made of rubber, and is cut by a slit (13a) provided in the axial direction. The outer periphery is made of a spring plate material, and at both ends in the circumferential direction, a tongue piece (14a) extends from the center in the axial direction from one side, and a parallel piece (from the other to sandwich the tongue piece (14a) ( 14b) (14b) extends, and is provided with a notch fitting portion (14c) that fits into each other to form a ring shape, and both ends thereof are V-shaped protruding outward in a right angle view with respect to the axial direction. A clip (14) having a pair of opening / closing operation pieces (15) (15) is mounted. The open / close operation pieces (15) and (15) are formed by covering each refracted spring plate material with a cap made of synthetic resin or rubber.

  The fixed part case (12) includes an annular part (16) for accommodating a clip (14) assembled with an annular elastic part (13), and a rear plate (17). The rear plate (17) is provided with an insertion hole (11), and the right side plate (4a) is provided with a through hole (4b) .The insertion hole (11), the through hole (4b), and the annular elastic portion (13 The through-holes (13b) provided in) are arranged coaxially.

  The upper part of the annular part (16) in the fixed part case (12) is notched, and the opening / closing operation pieces (15) (15) protrude from the notch part (16a) into a V-shape. Yes.

  The pencil fixing part (10) formed by assembling the annular elastic part (13) and the clip (14) in the fixing part case (12) has a set screw (18) (18) attached to the right side plate (4a). It is attached to the right side plate (4a) by screwing into the screw holes (4c) (4c).

  The cutting body (19), which is the main mechanism for centering the pencil (5) incorporated in the body (4), is configured as follows. That is, as shown in FIGS. 2 and 3, the cutting body portion (19) has a cutting hole provided with a cutting blade (21) similar to that generally used in a cylindrical cutting portion case (20). (22) is provided on the cutting part (23), the shaft (24) protruding from the cutting part (23) toward the opposite side of the pencil fixing part (10), and the shaft (24). A compression coil spring (25) for urging the cutting part (23) toward the pencil fixing part (10) and a cylindrical case (26) for accommodating them are configured.

  The cutting part case (20) and the cylindrical case (26) are respectively provided with discharge ports (20a) (26a) for discharging the shavings.

  An axial groove (27) is provided on the surface of the shaft (24) protruding from the cutting part (23).

On the other hand, a large gear (28) is coaxially provided on one of the left and right rear wheels (3) provided on the container body (4), and the large gear (28) is connected via an intermediate gear (29). It is connected with the small gear (30), and the rotation of the rear wheel (3) is transmitted to the small gear (30).
The large gear (28), the intermediate gear (29), and the small gear (30) include a partition side plate (4e) provided in parallel to the left side plate (4d) of the container (4), and a left side plate ( 4d) Contained between.

  The small gear (30), the partitioning side plate (4e), and the left side plate (4d) are provided with through holes (30a), (4f), and (4g) that are arranged coaxially. The shaped connector (31) is inserted. The tubular connector (31) rotates integrally with the small gear (30).

  A collar part (31a) is provided at the rear end of the cylindrical connector (31), and is connected from the outside of the peripheral wall of the collar part (31a) toward the inside of the cylindrical connector (31). The pin (32) is inserted.

  The free end (32a) of the connecting pin (32) is slidably engaged in the concave groove (27) of the shaft (24). The large gear (28), the intermediate gear (29), the small gear (30), the cylindrical coupler (31), and the coupling pin (32) constitute a driving force transmission mechanism (33).

  The free end (24a) of the shaft (24) is fitted into the insertion hole (31b) in the cylinder of the cylindrical connector (31), and the cutting part (23) is inserted in the cylindrical case (26). It is possible to reciprocate in the axial direction.

  A compression coil spring (25) is mounted on the shaft (24) between the rear end face of the cylindrical connector (31) and the cutting part (23), and the cutting part (23) is attached to the pencil fixing part. Energize towards (10).

  The cylindrical case (26) in which the cutting part (23), the shaft (24) and the compression coil spring (25) are accommodated has a set screw (18) between the right side plate (4a) and the partition side plate (4e). It has been fixed.

Next, the usage method of the pencil sharpener (1) comprised in this way is demonstrated.
As shown in FIG. 4, first, the open / close operation pieces (15) and (15) of the clip (14) in the pencil fixing part (10) are gripped and pressed in the direction in which they approach each other, and the annular elastic part (13) With the pressure removed (see FIG. 2), the pencil (5) is inserted through the insertion hole (11), and the front end of the pencil (5) is inserted into the cutting hole (22) of the cutting body (19).

  Next, the pencil (5) is pressed forward, the cutting part (23) is moved forward against the urging force of the compression coil spring (25), and then the open / close operation pieces (15) (15) When the hand is released, the pencil (5) is fixed by the annular elastic portion (13).

  Next, the container (4) is held with one hand and moved on a desk or the like to rotate the wheels (2) and (3). The rotation of the rear wheel (3) is driven by a driving force transmission mechanism (33) comprising a large gear (28), an intermediate gear (29), a small gear (30), a cylindrical connector (31), and a connecting pin (32). The shaft (24) and the cutting part (23) rotate in conjunction with each other, and the pencil (5) is centered.

  As the centering of the pencil (5) is performed, the cutting portion (23) moves toward the pencil fixing portion (10) by the biasing force of the compression coil spring (25), and this movement causes the cutting blade (23) to move. However, it is always pressed against the pencil (5), and the pencil (5) is sharpened in a good state.

  When the cutting part (23) comes into contact with the pencil fixing part (10), the movement of the cutting part (23) is stopped, so that the cutting blade (21) is idled and the pencil is not sharpened (see FIG. (See FIG. 5).

  Since the shavings of the pencil (5) are accumulated in the container (4) through the cutting part case (20) and the discharge ports (20a) (26a) of the cylindrical case (26), the cover (7) You can open and discharge outward.

  FIGS. 6 and 7 are perspective views of a main part showing a pencil sharpener (34) of the second embodiment and a pencil sharpener (35) of the third embodiment, respectively.

Only parts different from the pencil sharpener (1) of the first embodiment will be described.
The pencil sharpener (34) of the second embodiment is a tricycle type in which front and rear small wheels (37) and (37) are provided on the right side of the body (36), and one large wheel (38) is provided on the left side. is there.

  A cylindrical connection is made to the through hole (41) of the intermediate gear (40) provided coaxially with the large wheel (38) through three small internal gears (39) incorporated in the large wheel (38). The tool (42) is fitted, and the intermediate gear (40) and the cylindrical connector (42) rotate integrally.

  A connecting pin (43) is provided in a collar part (42a) provided at the rear end of the cylindrical connecting tool (42), and this connecting pin (43) is connected to the pencil sharpener (1) of the first embodiment. Similarly, it engages in an axial groove (46) provided in the shaft (45) of the cutting body (44) to transmit the rotation to the cutting part (47).

  To sharpen the pencil (48) using this pencil sharpener (34), after fixing the pencil (48) by operating the clip (49), hold the body (36) with one hand. Thus, by moving the desk or the like, the cutting unit (47) rotates in conjunction with the rotation of the large wheel (38), and the centering of the pencil (48) is automatically performed.

  The pencil sharpener (50) of the third embodiment is a four-wheeled vehicle type in which the pencil (51) is inserted from above the container (52).

  The first gear (54) disposed coaxially with the left and right rear wheels (53) (53), the second gear (55) meshing with the first gear (54), and the second gear (55). A third gear (56) that rotates integrally, and a fourth gear (57) that meshes with the third gear (56), and the third gear (56) and the fourth gear (57) The fourth gear (57) is arranged horizontally because of the zero roll gear. A cutting portion (58) is erected above the fourth gear (57) so as to rotate integrally with the fourth gear (57).

  Insert the pencil (51) into the cutting part (58) from above the body (52), hold the body with one hand and move it on the desk, etc., so that the pencil (51) is centered. Is called.

1 is an overall perspective view of a first embodiment of a pencil sharpener according to the present invention. Similarly, it is an exploded perspective view of a 1st embodiment. Similarly, it is the perspective view which saw through the mechanism inside a 1st embodiment. It is a principal part longitudinal cross-sectional view for demonstrating the operation state at the time of performing the pencil sharpening. Similarly, it is the principal part longitudinal cross-sectional view for demonstrating the operation state at the time of performing the centering of a pencil. It is a principal part perspective view which shows the pencil sharpener of 2nd Embodiment. It is a principal part perspective view which shows the pencil sharpener of 3rd Embodiment.

Explanation of symbols

(1) Pencil sharpener
(2) Front wheel
(3) Rear wheel
(4) Body
(4a) Right side plate
(4b) Through hole
(4c) Screw hole
(4d) Left side plate
(4e) Partition side plate
(4f) (4g) through hole
(5) Pencil
(6) Body body
(7) Cover
(8) (9) Axle
(10) Pencil fixing part
(11) Insertion slot
(12) Fixed part case
(13) Annular elastic part
(13a) Slit
(13b) Through hole
(14) Clip
(14a) Tongue piece
(14b) Parallel piece
(14c) Notch fitting part
(15) Opening / closing operation piece
(16) Annular part
(16a) Notch
(17) Rear plate
(18) Set screw
(19) Cutting body
(20) Cutting part case
(20a) Discharge port
(21) Cutting blade
(22) Cutting hole
(23) Cutting part
(24) Shaft
(24a) Free end
(25) Compression coil spring
(26) Cylindrical case
(26a) Discharge port
(27) Groove
(28) Large gear
(29) Intermediate gear
(30) Small gear
(30a) Through hole
(31) Tubular connector
(31a) Buttocks
(31b) Insertion hole
(32) Connecting pin
(32a) Free end
(33) Driving force transmission mechanism
(34) (35) Pencil sharpener
(36) Body
(37) Small wheels
(38) Large wheels
(39) Small internal gear
(40) Medium gear
(41) Through hole
(42) Cylindrical coupler
(42a) Buttocks
(43) Connecting pin
(44) Cutting body
(45) Shaft
(46) Groove
(47) Cutting part
(48) Pencil
(49) Clip
(50) Pencil sharpener
(51) Pencil
(52) Body
(53) Rear wheel
(54) 1st gear
(55) Second gear
(56) Third gear
(57) Fourth gear
(58) Cutting part

Claims (6)

  A cutting section that rotates in conjunction with a wheel provided in the container is provided inside the container having a pencil insertion opening via a driving force transmission mechanism, and the pencil inserted from the insertion opening is rotated by the wheel. Therefore, the pencil sharpener is characterized in that the cutting part is cored.   The pencil sharpener according to claim 1, further comprising a pencil fixing portion for preventing rotation of the pencil and preventing movement in the axial direction.   A pencil fixing part and a cutting main body part for centering the fixed pencil are connected in the axial direction of the pencil, and the cutting main body part is rotatable in a cylindrical case with a cutting blade. 3. The pencil sharpener according to claim 1, wherein the pencil sharpener is constructed so as to be reciprocally movable in the axial direction, and the cutting portion is biased toward the pencil fixing portion by a spring action.   An axial insertion hole is provided in the driving force transmission mechanism portion, and the free end of the shaft protruding from the cutting portion toward the insertion hole is inserted into the insertion hole, and the axial direction is formed on the surface of the shaft. By providing a concave groove and slidably engaging a connecting pin fixed to the peripheral wall forming the insertion hole in the concave groove, the cutting part can be reciprocated in the axial direction within the cylindrical case. The pencil sharpener according to any one of claims 1 to 3.   In the cylindrical case, a compression coil spring is mounted on the shaft projecting from the cutting part between the end face of the cylinder forming the insertion hole and the cutting part, so that the cutting part is directed to the pencil fixing part. The pencil sharpener according to any one of claims 1 to 4, wherein the pencil sharpener is biased.   The pencil sharpener according to any one of claims 2 to 5, wherein the pencil fixing part is of a clip type.

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