CN218315995U - Mechanical delay starting structure of pencil sharpener - Google Patents

Abstract

The utility model discloses a mechanical delay starting structure of a pencil sharpener, which comprises a starting mechanism, a rotatable and axially movable knife rest, wherein the starting mechanism is provided with a delay mechanism, a motor capable of driving the knife rest to rotate and an initial switch capable of being pushed by the knife rest to move; the primary switch is provided with a resistor electrically connected with the motor, and when a pencil is inserted into the knife rest, the knife rest and the primary switch move to enable the primary switch to touch the time delay piece to be electrified; when the time delay piece moves, the time delay piece can touch the continuous motion switch. The utility model discloses the structure is ingenious, reasonable in design, and convenient to use can begin circular telegram rotation work when the pencil inserts, can automatic power off after the cutting is accomplished, and need not the user and go to stir switch at every turn and carry out the operation of circular telegram or outage.

Description

Mechanical delay starting structure of pencil sharpener

Technical Field

The utility model belongs to the technical field of at electronic ware of cutting and specifically relates to a cut mechanical time delay start structure of ware.

Background

The pencil sharpener is a pencil sharpening tool and comprises a tool rest, a dust collection bin, a bin cover, a motor, a switch and other parts, wherein the tool rest sharpens the pencil, the residual pencil dust falls into the dust collection bin of the automatic pencil sharpener, and the pencil dust can be poured out after the bin cover is opened. The electric pencil sharpener utilizes the power generated by the electric motor to sharpen the pencil, and has simple, convenient and quick operation. The electric pencil sharpener is externally provided with a power adapter, the power adapter converts 220V alternating current into direct current, so that the direct current motor is powered, and the motor drives the knife rest to cut a pencil.

The electric pencil sharpener in the market is provided with a power switch, a motor and a tool rest are rotated after the power switch is turned on in advance, and then a pencil is inserted into the tool rest for sharpening; after the cutting work is finished, the pencil is separated from the tool rest, but sometimes a user forgets to turn off the power switch, and the tool rest continuously rotates at the moment, so that the waste of electric power energy is caused, and the improvement is needed.

Disclosure of Invention

The utility model aims to solve the technical problem that a mechanical time delay starting structure of ware is cut is provided, the pencil inserts the knife rest, and the knife rest removes and makes the switch circular telegram of just moving, so the motor drives the knife rest rotation and cuts the pencil, can break away from the switch that moves that continues after the time delay removal, then has cut off the power.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a mechanical delay starting structure of a pencil sharpener comprises a starting mechanism and a rotatable and axially movable knife rest, wherein the starting mechanism is provided with a delay mechanism, a motor capable of driving the knife rest to rotate and an initial switch capable of being pushed by the knife rest to move; the primary switch is provided with a resistor electrically connected with the motor, and when a pencil is inserted into the knife rest, the knife rest and the primary switch move to enable the primary switch to touch the time delay piece to be electrified; when the time delay piece moves, the time delay piece can touch the continuous movement switch.

The utility model has the advantages of the structure is ingenious, reasonable in design, and convenient to use can begin circular telegram rotation work when the pencil inserts, can automatic power off after the cutting is accomplished, and need not the user and go to stir switch at every turn and carry out the operation of circular telegram or outage. The method comprises the following steps: the tool rest is used for cutting the lower end of the pencil and can rotate and move up and down; the motor can drive the tool rest to rotate, and after the pencil is inserted into the tool rest, the tool rest pushes the primary switch to move downwards together, so that the primary switch touches the time delay piece to be electrified.

The resistor belongs to an electrical element and can reduce the current value flowing through the motor, so that the power of the motor is reduced; the power adapter is inserted into the socket, then the output end of the power adapter is connected with the electric pencil sharpener, when a pencil is inserted into the knife rest, the knife rest and the primary switch move to electrify the primary switch, the motor is started to rotate, and because the motor is subjected to the resistance of the pencil, the starting power and the current of the motor are larger when the motor is just started, so that the service life of the motor can be reduced, even the motor can be burnt, the power adapter can be damaged, or the power adapter is powered off (an overload protector is arranged in the power adapter, and when the starting power of the motor is larger than the output power of the power adapter, the overload protector cuts off the power supply to avoid the burning of the power adapter); when the motor runs for about 1 second, the power and the current of the motor gradually tend to be stable and are reduced to the rated value, the delay piece moves to cut off the power of the initial switch (the resistor is also in a power-off state), but the continuous switch is switched on at the moment, so that the motor can continuously rotate to sharpen the pencil; the time delay piece continues to move, and finally the time delay piece can continue to move the switch to enable the continuous moving switch to be powered off, so that the pencil is cut, a user does not need to actively turn off the power switch, and automatic power off is realized.

As the utility model discloses further improve: the starting mechanism is provided with a lifting frame which can be pushed to move by the tool rest, the primary switch is fixedly arranged at the lifting frame, the lifting frame is provided with a rotatable rotating rod, the rotating rod is connected with the tool rest, and the rotating rod is in transmission connection with the delay piece through a speed reducing assembly. When the pencil is inserted into the tool rest downwards, the tool rest, the lifting frame and the primary switch move downwards together; after the switch is switched on for the first time, the motor drives the rotating rod to rotate, the rotating rod drives the tool rest to rotate, the rotating rod also drives the speed reduction assembly to rotate, and the speed reduction assembly drives the time delay piece to move.

As the utility model discloses further improve: the speed reduction assembly is provided with a primary pinion, the primary pinion is provided with a notch gear and a full-tooth gear, and the notch gear is provided with a notch groove; the upper end of the rotating rod is provided with a power-off rod extending to the tool rest, the lower end of the rotating rod is provided with rotating teeth, and the rotating teeth can be meshed with the notch gear or the full-tooth gear. The rotating teeth are meshed with the notch gear so as to enable the notch gear to rotate, when the notch gear rotates to the notch position, the rotating teeth cannot drive the notch gear to rotate, and the delay piece stops moving; when the pencil is sharpened gradually, the pencil also moves downwards gradually, the pencil point pushes the power-off rod to move downwards, the power-off rod drives the rotating rod to move downwards, the rotating teeth are meshed with the full-tooth gear, then the power-off rod and the rotating rod reach the lowest limit position to stop moving downwards, the delay piece continues to move, and the cutter of the cutter rest cuts the pencil point with less cutting amount (the surface of the pencil point is cut to be smooth); and finally, the time delay piece is separated from the continuous movement switch, the motor stops rotating, and the pencil is taken out after the cutting work is finished.

As the utility model discloses further improve: the upper end of the rotating rod is provided with a connecting rod connected with the tool rest, a movable hole is arranged in the connecting rod, and the movable hole is connected with the power-off rod in a sliding manner; the starting mechanism is provided with a transmission assembly connected with the connecting rod, the transmission assembly is provided with a plurality of transmission gears which are meshed with each other, and one of the transmission gears is meshed with the motor. The motor drives the plurality of transmission gears to rotate, the transmission gears can play a role in reducing speed, then the transmission gears drive the connecting rods and the rotating rods to rotate, and then the tool rest starts to rotate for cutting; the power breaking rod can move up and down in the movable hole.

As the utility model discloses further improve: the time delay piece be equipped with the flat rack, the speed reduction unit be equipped with the second grade pinion of flat rack meshing, the second grade pinion be equipped with the second grade gear wheel of one-level pinion meshing. The rotary teeth of the rotary rod can drive the notch gear or the full-tooth gear to rotate, so that the first-stage pinion starts to rotate, then the first-stage pinion drives the second-stage gearwheel to rotate, and therefore the second-stage pinion rotates, and finally the second-stage pinion drives the flat rack to move linearly.

As the utility model discloses further improve: the time delay piece be equipped with and dodge the mouth and dodge the groove, the button of continuous action switch can be located and dodge the mouth, the button of just moving the switch can be located and dodge the inslot. After the time delay piece moves, the button of the primary switch is positioned in the avoidance groove (at the moment, the primary switch is in a power-off state); when the time delay piece is in the initial state, the button of the continuous motion switch is positioned in the avoiding opening (at the moment, the continuous motion switch is in the power-off state).

As the utility model discloses further improve: the delay mechanism is provided with a return spring which can give elasticity to the delay piece. After the sharpened pencil is separated from the tool rest, the reset spring can push the time delay piece to the initial position.

As the utility model discloses further improve: the connecting rod is provided with a convex rib, the tool rest is provided with a rotary groove, and the upper end of the convex rib is clamped with the rotary groove; the middle part of the convex rib is sleeved with one of the transmission gears. The convex rib is clamped in the rotary groove, the motor drives the transmission assembly to rotate, the transmission gear at the tail end drives the connecting rod to rotate, and the connecting rod can drive the tool rest to rotate when rotating.

As the utility model discloses further improve: the rotating rod is provided with a push-up spring which can give elasticity to the rotating rod; the time delay mechanism is provided with a sliding groove, and the sliding groove is connected with the time delay piece in a sliding manner. The sliding groove can limit the time delay piece, so that the time delay piece can move linearly; after the pencil after sharpening breaks away from the knife rest, the upward pushing spring can upwards push the rotating rod to the initial position, and then the crane can also upwards return to the initial position along with the rotating rod.

As the utility model discloses further improve: also includes a housing. The starting mechanism, the knife rest and other parts are arranged in the shell, thus forming the electric pencil sharpener.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is an exploded view of the actuating mechanism;

FIG. 3 is an exploded view of the delay mechanism and associated components;

FIG. 4 is a schematic view of the delay mechanism and associated components in combination;

FIG. 5 is a cross-sectional view of the delay mechanism and associated parts;

FIG. 6 is an assembled schematic view of the actuating mechanism (with the stationary cover hidden);

fig. 7 is a schematic cross-sectional view of the present invention;

FIG. 8 is a schematic view of a portion of the components of the present invention in a first state;

FIG. 9 is a schematic view of a portion of the components of the present invention in a second state;

fig. 10 is a schematic view of a part of the third state of the present invention;

fig. 11 is a schematic view of a part of the components of the present invention in a fourth state;

fig. 12 is a partial schematic part view of the fifth state of the present invention;

fig. 13 is a schematic circuit diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1-13: a mechanical delay starting structure of a pencil sharpener comprises a starting mechanism 3, a tool rest 2 which can rotate and axially move, wherein the starting mechanism 3 is provided with a delay mechanism 6, a motor 5 which can drive the tool rest 2 to rotate, and a primary switch 7 which can be pushed by the tool rest 2 to move, and the delay mechanism 3 is provided with a movable delay piece 9 and a secondary switch 8 which is not in contact with the delay piece 9 in an initial state; the primary switch 7 is provided with a resistor 11 electrically connected with the motor 5, when the pencil 10 is inserted into the knife rest 2, the knife rest 2 and the primary switch 7 move to enable the primary switch 7 to touch the time delay piece 9 to be electrified; when the delay piece 9 moves, the delay piece 9 can touch the continuous movement switch 8.

The starting mechanism 3 is provided with a lifting frame 67 which can be pushed to move by the tool rest 2, the primary switch 7 is fixedly arranged at the lifting frame 67, the lifting frame 67 is provided with a rotatable rotating rod 63, the rotating rod 63 is connected with the tool rest 2, and the rotating rod 63 is in transmission connection with the delay element 9 through a speed reducing assembly 66. The motor 5, the speed reducing component 66, the rotating rod 63 and the tool rest 2 rotate together, and the time delay piece 9 moves linearly.

The reduction assembly 66 is provided with a primary pinion 64, the primary pinion 64 is provided with a notch gear 642 and a full-tooth gear 641, and the notch gear 642 is provided with a notch 643; the upper end of the rotating rod 63 is provided with a power-off rod 61 extending to the tool holder 2, the lower end of the rotating rod 63 is provided with a rotating tooth 631, and the rotating tooth 631 can be engaged with the notch gear 642 or the full-tooth gear 641. The notch gear 642 can enable the time delay piece 9 to rotate firstly and then stop; the rotating tooth 631 is positioned inside the lifting frame 67, and the rotating tooth 631 can move up and down in the lifting frame 67; the lifting frame 67 is provided with a notch, and the teeth at the edge of the rotating tooth 631 extend out of the notch, so that the rotating tooth 631 can be meshed with the notch gear 642 or the full-tooth gear 641.

The upper end of the rotating rod 63 is provided with a connecting rod 62 connected with the tool rest 2, a movable hole 622 is arranged inside the connecting rod 62, and the movable hole 622 is connected with the power-off rod 61 in a sliding manner; the starting mechanism 3 is provided with a transmission assembly 4 connected with a connecting rod 62, the transmission assembly 4 is provided with a plurality of transmission gears 41 which are meshed with each other, and one transmission gear 41 is meshed with the motor 5. The actuating mechanism 3 is provided with a fixed cover 31, and the fixed cover 31 can support the upper ends of the connecting rod 62 and the plurality of transmission gears 41. The transmission assembly 4 can reduce the output rotating speed of the motor 5, so that the rotating speed of the extension rod 62, the rotating rod 63 and the tool rest 2 is lower than that of the motor 5, and the transmission torque is indirectly improved.

The delay member 9 is provided with a flat rack 91, the reduction assembly 66 is provided with a secondary pinion 65 engaged with the flat rack 91, and the secondary pinion 65 is provided with a secondary bull gear 651 engaged with the primary pinion 64.

The time delay piece 9 is provided with an avoiding opening 93 and an avoiding groove 92, the button 81 of the continuous motion switch 8 can be positioned in the avoiding opening 93, and the button 71 of the initial motion switch 7 can be positioned in the avoiding groove 92.

The delay mechanism 6 is provided with a return spring 94 capable of giving an elastic force to the delay member 9. The return spring 94 can return the delay element 9 after the pencil has been cut.

The connecting rod 62 is provided with a convex rib 621, the knife rest 2 is provided with a rotary groove 22, and the upper end of the convex rib 621 is clamped with the rotary groove 22; the middle part of the rib 621 is sleeved with one of the transmission gears 41. The upper end of the convex rib 621 is inserted into the rotary groove 22; the middle portion of the rib 621 rotates in synchronization with one of the transmission gears 41.

The rotating rod 63 is provided with an upward pushing spring 68 which can give elasticity to the rotating rod 63; the time delay mechanism 6 is provided with a sliding groove 60, and the sliding groove 60 is connected with the time delay piece 9 in a sliding way. The delay member 9 can move linearly along the slide groove 60.

Also comprises a housing 1. The housing 1 is intended to accommodate the tool holder 2, the actuating mechanism 3 and other components.

The initial switch 7 and the follow-up switch 8 are both microswitches which have a minute contact gap and a snap action mechanism and perform switching action with a prescribed stroke and a prescribed force, and the outside of which is a switch with a driving rod, so the microswitch is called a sensitive switch because the contact gap of the switch is relatively small.

The utility model discloses a working process is: the power adapter is electrically connected with the utility model, the button 71 of the initial switch 7 does not touch the time delay element 9, so the initial switch 7 is in the power-off state, and the button 81 of the continuous switch 8 is positioned in the avoiding port 93 of the time delay element 9, so the continuous switch 8 is also in the power-off state; as shown in fig. 8, the utility model is in the first state, the lower end of the pencil 10 is inserted into the cutting cavity of the tool holder 2 by hand, the pencil 10 and the tool holder 2 move downwards, the tool holder 2 presses the extension rod 62 and the lifting frame 67 to move downwards, the button 71 of the primary switch 7 touches the delay element 9 to electrify the primary switch 7 (the resistor 11 is also in the electrified state), and at this time, the motor 5, the extension rod 62, the rotating rod 63 and the tool holder 2 start to rotate; as shown in fig. 9, in the second state, the lower end of the pencil 10 is gradually sharpened, at this time, the pencil 10 gradually moves downward and slowly, and then the pencil point touches the off-pole 61, then the off-pole 61 and the rotary pole 63 move downward, the rotary tooth 631 is engaged with the notch gear 642, so that the notch gear 642, the full-tooth gear 641 and the primary pinion 64 start to rotate, the primary pinion 64 drives the secondary bull gear 651 to rotate, the secondary pinion 65 drives the delay element 9 to move, and the side surface of the delay element 9 touches the button 81 of the continuous switch 8 to energize the continuous switch 8; as shown in fig. 10, in the third state, when the notch 643 rotates to the position of the rotating tooth 631, the notch gear 642 does not rotate any more, the delay element 9 stops moving, the button 71 of the initial switch 7 is located in the avoiding slot 92, the initial switch 7 and the resistor 11 are in the power-off state, and the continuous switch 8 continues to be powered on; fig. 11 shows a fourth state, in which the lower end of the pencil 10 is sharpened and moved downward slowly, the power-off rod 61 and the rotating rod 63 are moved downward, the rotating teeth 631 are engaged with the full-tooth gear 641, so that the delay element 9 is moved further, at which time the pencil 10 has finished sharpening, and the tool rest 2 performs a very small cutting amount on the pencil point, so that the surface of the pencil point can be made smooth; fig. 12 shows a fourth state, in which the time-delay element 9 is moved to disengage the button 81 of the continuous-movement switch 8, the continuous-movement switch 8 is de-energized, and the pencil is cut.

The circuit principle of the utility model is that: after the pencil 10 is inserted into the knife rest 2, the primary switch 7 is started, the current of the power supply 12 flows through the resistor 11, the primary switch 7 and the motor 5, a part of the voltage of the power supply 12 is shared by the resistor 11, the starting power of the motor 5 is defined as P1 (assuming that the circuit is not connected with the resistor 11, the starting power of the motor 5 is defined as P2), and P1 is smaller than P2, so that the resistor 11 can prevent the motor 5 and the power adapter from being damaged due to overlarge power; then the time delay piece 9 moves, the continuous action switch 8 is in a conducting state, and the current of the power supply 12 flows through the continuous action switch 8 and the motor 5 (at this time, the resistor 11 and the initial action switch 7 are short-circuited); then the initial switch 7 is turned off, and finally the continuous switch 8 is turned off, so that the pencil 10 finishes the cutting work.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. A mechanical delay starting structure of a pencil sharpener is characterized by comprising a starting mechanism and a rotatable and axially movable knife rest, wherein the starting mechanism is provided with a delay mechanism, a motor capable of driving the knife rest to rotate and an initial switch capable of being pushed by the knife rest to move; the primary switch is provided with a resistor electrically connected with the motor, and when a pencil is inserted into the knife rest, the knife rest and the primary switch move to enable the primary switch to touch the time delay piece to be electrified; when the time delay piece moves, the time delay piece can touch the continuous movement switch.

2. The mechanical delay starting structure of the pencil sharpener of claim 1, wherein the starting mechanism is provided with a lifting frame which can be pushed by the tool post to move, the initial switch is fixedly arranged at the lifting frame, the lifting frame is provided with a rotatable rotating rod, the rotating rod is connected with the tool post, and the rotating rod is in transmission connection with the delay piece through a speed reducing component.

3. The mechanical delay starting structure of the pencil sharpener of claim 2, wherein said speed reducing assembly is provided with a primary pinion, said primary pinion is provided with a notch gear and a full-tooth gear, said notch gear is provided with a notch groove; the upper end of the rotating rod is provided with a power-off rod extending to the tool rest, the lower end of the rotating rod is provided with a rotating tooth, and the rotating tooth can be meshed with a notch gear or a full-tooth gear.

4. The mechanical delay starting structure of the pencil sharpener as claimed in claim 3, wherein the upper end of the rotating rod is provided with a connecting rod connected with the tool rest, a movable hole is arranged inside the connecting rod, and the movable hole is slidably connected with the power-off rod; the starting mechanism is provided with a transmission assembly connected with the connecting rod, the transmission assembly is provided with a plurality of transmission gears which are meshed with each other, and one of the transmission gears is meshed with the motor.

5. The mechanical delay starting structure of a pencil sharpener of claim 4, wherein said delay member has a flat rack, said deceleration assembly has a secondary pinion engaged with said flat rack, said secondary pinion has a secondary bull gear engaged with said primary pinion.

6. The mechanical delay starting structure of the pencil sharpener of claim 5, wherein said delay member has an avoidance port and an avoidance slot, said continuous operation switch button can be located in the avoidance port, and said initial operation switch button can be located in the avoidance slot.

7. The mechanical delay starting structure of the pencil sharpener as claimed in claim 6, wherein the delay mechanism is provided with a return spring which can give elasticity to the delay member.

8. The mechanical delay starting structure of the pencil sharpener as claimed in claim 4, wherein the connecting rod is provided with a convex rib, the tool rest is provided with a rotary groove, and the upper end of the convex rib is clamped with the rotary groove; the middle part of the convex rib is sleeved with one of the transmission gears.

9. The mechanical delay starting structure of the pencil sharpener as claimed in claim 2, wherein the rotating rod is provided with a push-up spring which can give elasticity to the rotating rod; the time delay mechanism is provided with a sliding groove, and the sliding groove is connected with the time delay piece in a sliding manner.

10. The mechanical delay-activated structure of a sharpener of claim 1 further comprising a housing.

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