JPS6350154Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is an electric pencil sharpener in which the length of the pencil lead tip can be adjusted when cutting a pencil. In this invention, the switch contact part of the cutting completion display structure is made into an integrated case, and the entire switch part can be rotated by an external operating member, and by changing the closing operating point of the cutting completion display switch, the tip length can be adjusted. It is for making adjustments.

Hereinafter, one embodiment of the present invention will be described based on the drawings.The main body case 1 includes an outer case 2 and a bottom cover 3.
, a base frame 4 on which each component is mounted, and a waste container case 5. Main parts such as a battery 6, a motor 7, a step-down transformer 8 for charging, a cutter holder 9, and a gear group 10 for decelerating and transmitting rotational power to the holder 9 are installed in the base frame 4. A gear fixing plate 11 is fixed to the lower part of the base frame 4 with screws 13, 13 so as to form a gear storage chamber 12.
A decorative plate 14 is attached to the top surface of the outer shell case 2 and can be slid freely in the direction of arrow B (see FIG. 2 or 4). It matches the through hole 16 on the top of the case 2, and inserts the pencil into the cutter holder 9.
It can be inserted inside. 17 is provided in this through hole 16, and when a pencil is inserted, it moves to the left (arrow a) and activates a drive switch (not shown).
This is the actuation protrusion that turns it ON. The cutter holder 9 has a conical pencil insertion opening 18, and a flat sharpening blade 19 is fixed to the inner edge of the cutter holder 9. The shaft portion 9' is pivotally supported by the base frame 4. 21 is the bearing metal. Reference numeral 22 denotes a detection plate which is lowered by the tip of the pencil when the pencil is sharpened, and is loosely fitted into a guide plate 24 fixed to the side surface of the cutter holder 9 with a screw 23. Furthermore, the upper end of a tip detection rod 20 loosely inserted into the shaft portion 9' of the cutter holder 9 is in contact with the detection plate 22. In the space 25 between the gear fixing plate 11 and the bottom cover 3, a switch contact portion having a cutting completion display structure is housed in a case. That is, a switch case 28, in which a fixed contact piece 26 and a movable contact piece 27 are disposed facing each other, is pivoted at one end so as to be rotatable. Its pivot structure includes shafts 29 and 2 on both sides of one end of the switch case 28.
9 is provided protrudingly, and the gear fixing plate 11 has a recessed portion 30 for receiving the shafts 29, 29.
A pair of bearing pieces 31, 31 having 30 are provided,
Support pieces 32, 32 supporting the shafts 29, 29 are integrally formed on the bottom cover 3 side so as to face the shafts 29, 29, and the alignment of these support pieces 32, 32 with the bearing pieces 31, 31 It is pivotally supported.
On the upper surface of the switch case 28, a tip pin 2 of the tip detection rod 20 is located at a portion away from the pivot portion.
An insertion hole 33 is formed into which 0' can be inserted comfortably. 34, 34 are wing-shaped protrusions provided on both sides of the switch case 28 so as to be in line with the insertion hole 33, and the lower left corner has a tapered surface 35, 34.
It has been cut to 5. 36 is the empty space 25
It is an external operating member arranged so that it can be slid in the horizontal direction (arrow b), and has a U-shaped planar shape, and operating knobs 37, 37 provided on both sides are formed on both side walls of the bottom cover 3. It faces inside the sliding holes 38, 38. The external operating member 36 includes arm portions 39, 39 located below the protrusions 34, 34 of the switch case 28, and stepped portions 40, 4 on the arm portions 39, 39.
0' is formed. And this step part 40,4
The upper part of the boundary edge 0' is formed into an arc shape so as to smoothly engage with the tapered surfaces 35, 35 during sliding. By the way, the step portion 40',
40', when the protrusions 34, 34 are depressed as shown in FIG. The upper ends are separated by a large distance. Also, the arm portions 39, 39
moves to the right and the protrusions 34, 3 are moved by the steps 40, 40.
4 and when the protrusions 34, 34 are placed on the stepped parts 40, 40, the switch case 28 is horizontal as shown in FIG. 5, and the upper end of the tip detection rod 20 is It is approaching the upper edge of the cutter holder 9.

The present invention is constructed as described above, and its operation will be explained next. In FIG. When it is moved to the right end side of 38, 38, the arm part 3 is moved as shown in Fig. 5.
The switch case 2 is placed on the stepped portions 40 and 40 of 9 and 39.
The switch case 28 is mounted on the protrusions 34, 34 of 8.
The whole area is horizontal. In this state, the plaque 14
is moved to the left, the pencil insertion opening 15 is aligned with the pencil insertion opening 18 of the cutter holder 9, and when the pencil is inserted, the operating protrusion 17 is moved and the drive switch is turned on. In this way, the motor 7 rotates, and its rotational force is transmitted to the cutter holder 9 via the reduction gear group 10. The inserted pencil is sharpener 1
When the tip is formed by cutting at step 9, the detection plate 22 is lowered by the tip, and then the tip detection rod 2 is lowered by the tip.
0 descends against the elasticity of the movable contact piece 27 (arrow A)
do. The amount of descent of the detection rod 20 is proportional to the amount of the tip formed, and as the tip detection rod 20 is further lowered, the movable contact piece 27 is finally brought into contact with the fixed contact piece 26. This contact between the two contact pieces 27 and 26 lights up the tip cutting completion indicator lamp 41 on the upper part of the main body case 1 to notify this. Next, if you want to cut the tip length longer than it is now, pull the operating knobs 37, 37 and slide the external operating member 36 to the left. Then, the protrusions 34, 34 move from the steps 40, 40 of the arms 39, 39 that have been lifting it up until now to the adjacent step 4.
It drops to 0', 40' and becomes as shown in Figure 6. As a result, the switch case 28 tilts downward under its own weight. This means that the upper edge of the cutter holder 9 moves away from the upper end of the tip detection rod 20.
The amount of penetration of the pencil into the through hole 15 increases. Then, the pencil is inserted into the cutter holder 9,
The tip of the tip begins to be shaved, and as a result, the tip of the tip detection plate 2
2, the lead tip detection rod 20 is lowered, and the pencil moves an extra distance (tilting of the switch case 28 minutes) are inserted more than in the previous case. Therefore, even if the tip of the core is shaved off, it will be longer and thinner than the previous time.
26 comes into contact, and the indicator lamp 41 lights up to notify this.

As described above, according to the present invention, in order to adjust the tip length when cutting a pencil, a switch contact part with a cutting completion display structure is provided in the case, and the entire switch part can be controlled by an external operating member. Rotate within the range of
By changing the distance between the upper end of the tip detection rod and the upper edge of the cutter holder and changing the closing operating point, cutting adjustment of the tip length can be easily performed. Specifically, a switch case in which a fixed contact piece and a movable contact piece are arranged facing each other is pivoted at one end within the main body case so that it can be rotated, and a cutter holder is mounted on the top surface of the switch case. An insertion hole is provided into which the tip of the tip detection rod enters when the tip is moved by the inserted and formed tip.On the other hand, the mechanism for rotating this switch case from the outside first connects the pivot side of the switch case. A projection is provided on both sides of the opposite side, and an operating member that is slidably operated from the outside is provided with an arm portion that slides on the lower part of the projection, and a step that engages and disengages from the projection is provided on the arm portion. By engaging and disengaging with this stepped part, the switch case is moved to move the end opposite to the pivot side, and the entire switch case can be rotated, and the upper edge of the cutter holder and the core By changing the distance to the top of the tip detection rod, the operating point at which the switch part closes can be easily changed, and the length of the tip can be adjusted. In this way, the tip of the lead in an electric pencil sharpener can be achieved using simple components such as the protrusion on the switch case side and the stepped part of the arm on the external operating member side that engages and disengages the protrusion, and is inexpensive and easy to operate. A length adjustment device can be provided.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view of the overall appearance, Fig. 2 is a sectional view with the main parts broken away, Fig. 3 is a structural sectional view of the cutter holder, and Fig. 4 is the tip of the tip. A plan sectional view of the structure of the main part of the length adjustment mechanism, FIG. 5 is a side sectional view of the main part of the adjustment mechanism when the core tip length is small,
FIG. 6 is a sectional side view of the main part of the adjustment mechanism when the length of the tip is increased, and FIG. 7 is a sectional view of the relationship between the contact piece in the switch case and the tip detection rod that comes into contact with it. 9... cutter holder, 20... tip detection rod, 20'... lower end of tip detection rod, 28... switch case, 33... through hole, 26... fixed contact piece,
27...Movable contact piece, 36...External operation member, 1...
...Body case, 34, 34...Protrusion, 39, 39
...Arm part, 40, 40'...Step part'.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The lower end of the tip detection rod, which is arranged vertically in the cutter holder and slides by the tip of the pencil lead, is a through-hole provided in the switch case with one end pivoted. is brought into contact with a movable contact piece opposite to a fixed contact piece in the case, and the elastic force of the movable contact piece urges the tip detection rod toward the upper edge of the cutter holder, and the switch An electric pencil sharpener, wherein the main case is provided with an external operating member that moves the entire case so that the distance between the upper edge of the cutter holder and the upper end of the tip detection rod can be changed. (2) The switch case is provided with protrusions on both sides opposite to the pivot side, and the external operating member is provided with an arm portion that moves the lower part of the protrusion, and the protrusion is provided on the arm portion. The electric pencil sharpener according to claim 1, wherein the electric pencil sharpener is formed with a stepped portion that engages and disengages with the utility model.