CN214215312U - Safety protection system and electric pencil sharpener - Google Patents

Abstract

The utility model discloses a safety protection system and electronic penknife, including casing, motor, battery, pencil sharpener and advance a passageway, the motor is used for driving the rotation of pencil sharpener, the battery provides the energy for the motor, advance and be equipped with the trigger switch who starts the motor on the passageway, be equipped with the cavity of installation pencil sharpener in the casing, be equipped with a hatch door on the casing corresponding to the cavity, the inboard of hatch door disposes the front switch, battery, motor, trigger switch and front switch establish ties into a return circuit, the hatch door closes and causes the front switch to switch on; the hatch door is opened to turn off the front switch; when the cabin door is opened, the pencil sharpener rotates to cut fingers of a user or the pencil sharpener is thrown out to cause potential safety hazards.

Description

Safety protection system and electric pencil sharpener

Technical Field

The utility model relates to an electronic penknife for cutting the pencil especially relates to a safety protection system in electronic penknife.

Background

The pencil sharpener is a study or office article. Early pencil sharpeners included a frame with an obliquely positioned blade, into which the pencil was inserted and which was sharpened by rotating the sharpener.

At present, the pencil sharpener is commonly used, and is classified by the power for driving the pencil sharpening mechanism, and can be divided into a hand pencil sharpener and an electric pencil sharpener.

The cutter of the electric pencil sharpener is divided into a hob assembly or a pencil sharpener; the hob has a complex structure, an automatic pen feeding device needs to be configured, and the manufacturing cost is high; such as an electric pencil sharpener of CN206703798U and an electric pencil sharpener of CN201333883Y, etc.

The sharpener type electric pencil sharpener needs to replace the worn sharpener frequently. Therefore, when the hand of the user contacts the pencil sharpener, the situation that the electric pencil sharpener is started accidentally may exist, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an electronic penknife's safety protection system is provided, further provide an electronic penknife that has above-mentioned safety protection system.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the safety protection system is applied to the electric pencil sharpener and is characterized by comprising a shell, a motor, a battery, a pencil sharpener and a pencil feeding channel, wherein the motor is used for driving the pencil sharpener to rotate, the battery provides energy for the motor, the pencil feeding channel is provided with a trigger switch for starting the motor, a cavity for mounting the pencil sharpener is arranged in the shell, the shell corresponding to the cavity is provided with a cabin door, the inner side of the cabin door is provided with a front switch, the battery, the motor, the trigger switch and the front switch form a loop, and the cabin door is closed to enable the front switch to be conducted; the hatch is opened to turn off the front switch.

The utility model discloses further preferred scheme does: the trigger switch and the front switch are microswitches.

The utility model discloses further preferred scheme does: the inner side of the cabin door is provided with a trigger rod which is contacted with the front switch, and when the cabin door is closed, the cabin door is contacted with the front switch through the trigger rod.

The utility model discloses further preferred scheme does: a gear assembly is arranged between the motor and the pencil sharpener.

The utility model discloses further preferred scheme does: the pencil sharpener comprises a sharpener frame and a blade arranged on the sharpener frame, wherein the blade is assembled on the sharpener frame through a screw.

The utility model discloses further preferred scheme does: the battery is a disposable battery or a rechargeable battery.

The utility model discloses further preferred scheme does: the pencil sharpener is separated from the motor by a partition plate.

The utility model discloses further preferred scheme does: the chamber serves as a chip collecting box.

The utility model discloses further preferred scheme does: the hatch door is transparent or semitransparent, and is connected to the side part of the shell through a buckle structure.

The utility model discloses a protection theme, electronic penknife, including foretell safety protection system.

Compared with the prior art, the utility model has the advantages that when the cabin door is closed, the front switch is closed, the pencil is inserted into the pencil feeding channel to start the trigger switch, and the pencil sharpener rotates to cut the pencil; when the cabin door is opened, the front switch is switched off, and even if the trigger switch is triggered, the pencil sharpener on the inner side of the cabin door cannot rotate; the hidden danger of injury of the user is eliminated.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a perspective view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 3 is an exploded view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 4 is a first internal structure view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 5 is a second internal structure view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 6 is a third internal structure view of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 7 is a first drawing showing a first mounting structure of a sharpener of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 8 is a second drawing illustrating a second mounting structure of a sharpener of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 9 is an exploded view of a sharpener mounting structure of an electric pencil sharpener according to a preferred embodiment of the present invention;

FIG. 10 is a schematic diagram of the electrical connections of an electric pencil sharpener according to a preferred embodiment of the present invention;

fig. 11 is a circuit diagram of an electric pencil sharpener according to a preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-6, the electric pencil sharpener includes a housing 100, a driving assembly, a battery 300, a pencil sharpener 400 and a pencil feeding channel 500, wherein the pencil feeding channel 500 extends from the inside of the housing 100 to the surface of the housing 100 to form a pencil insertion hole 1 on the surface of the housing 100. The sharpener 400 is abutted with the pencil feeding channel 500, and the pencil is inserted into the pencil feeding channel 500 from the pencil inserting hole 1, so that the front section of the pencil falls into the cutting area of the sharpener 400.

In addition, as shown in fig. 2-5, the driving assembly includes a motor 201, a gear assembly 202 and an output shaft 203, the motor 201 drives the gear assembly 202 to rotate, the end of the gear assembly 202 is connected to the output shaft 203, and the output shaft 203 is connected to the pencil sharpener 400. The motor 201 works to drive the gear assembly 202 to rotate and drive the output shaft 203, and the output shaft 203 rotates to drive the pencil sharpener 400 to rotate, so that the electric pencil sharpener realizes automatic pencil sharpening under the driving of electric power, and a user sharpens a pencil more easily and conveniently.

Also, the battery 300 is electrically connected to the motor 201 to provide power to the motor 201. Preferably, the battery 300 is a disposable battery or a rechargeable battery.

As shown in fig. 1 to 5, a first chamber 101 for installing the pencil sharpener 400 is provided in the casing 100, and a hatch 4 is provided on the casing 100 corresponding to the first chamber 101, so that a user can repair, clean and replace the pencil sharpener 400 by opening the hatch 4. Meanwhile, the first chamber 101 serves as a dust collecting box for collecting dust generated during the pencil sharpening process, and the hatch 4 is provided for the convenience of a user to clean the dust.

Preferably, the hatch 4 is transparent or translucent to facilitate the user to observe the status of the dust collecting, the sharpening of the pencil and the position of the pencil sharpener 400 in the first chamber 101. It is further preferred that the door 4 is connected to the side of the housing 100 by a snap-fit structure.

Preferably, the housing 100 further comprises a second chamber 102 for accommodating the motor 201, the first chamber 101 for mounting the pencil sharpener 400 and the second chamber 102 for accommodating the motor 201 are arranged in parallel in the transverse direction, and the first chamber 101 and the second chamber 102 are separated by a longitudinal partition 2.

And a third chamber 103 for accommodating the gear assembly 202 is further arranged below the first chamber 101 and the second chamber 102, the third chamber 103 is separated from the first chamber 101 by a transverse partition plate 3, the transverse partition plate 3 is provided with a through hole T, and the pencil sharpener 400 is in butt joint with the output shaft 203 through the through hole T.

Since the sharpener 400 is susceptible to wear during use, it interferes with the use of the entire electric sharpener. In the present embodiment, a mounting structure of the pencil sharpener 400 convenient for replacement is provided. Through this mounting structure, the user can change the sharpener 400 to continue to use the electric pencil sharpener with the original host, thereby saving the cost and realizing the maximum utilization of resources.

As shown in fig. 2, 3, and 7-9, the sharpener mounting structure for facilitating replacement includes a sharpener 400, a movable sleeve 600, and a support plate 700 having a pencil insertion hole 1. The output shaft of the driving assembly is located below the support plate 700. The sharpener 400 is positioned between the support plate 700 and the drive assembly. The pencil sharpener 400 includes a blade holder 10 and a blade 9 mounted on the blade holder 10, wherein the blade 9 is mounted on the blade holder 10 by a screw, and the blade 9 is located at a middle section of the blade holder 10.

The movable sleeve 600 is movably installed below the support plate 700 up and down with respect to the support plate 700. The bottom end of the tool rest 10 of the pencil sharpener 400 is provided with a connector 11, so that the connector is detachably connected with the driving assembly; the pen inlet end 12 at the upper end of the knife rest 10 is sleeved with the movable sleeve 600. Furthermore, the center hole of the movable sleeve 600 is abutted with the pen inserting hole 1 to form a pen feeding channel 500, and the pen feeding channel 500 is abutted with the pen feeding hole of the tool holder 10.

As shown in fig. 2 and 8, an elastic member 800 is provided between the movable sleeve 600 and the supporting plate 700. When no external force is applied, the elastic member 800 is compressed moderately, so that a downward force is applied to the movable sleeve 600, and the pencil sharpener 400 is fixed between the movable sleeve 600 and the driving assembly. When the user moves the movable sleeve 600 toward the supporting plate 700 and further compresses the elastic member 800, the movable sleeve 600 is away from the pen-feeding end 12 of the tool holder 10, so that the pen-feeding end 12 of the tool holder 10 can be separated from the movable sleeve 600. The upper end of the cartridge 10 is now free and not positionally restricted so that the user can remove the sharpener 400 from the housing 100 after the removable attachment of the cartridge 10 to the drive assembly is released.

On the contrary, when the pencil sharpener 400 is mounted on the housing 100, the movable sleeve 600 is moved toward the supporting plate 700, the compression amount of the elastic member 800 is increased to store energy, and then the bottom end of the tool rest 10 is connected to the driving assembly. Then, the movable sleeve 600 is released, and the compressed amount of the elastic member 800 is reduced to drive the movable sleeve 600 to move downwards, so that the movable sleeve 600 is sleeved with the pen inlet end 12 of the tool holder 10.

Preferably, the supporting plate 700 is provided with a fixing sleeve 900, the fixing sleeve 900 extends downwards from the bottom of the supporting plate 700, and one end of the movable sleeve 600 extends into the fixing sleeve 900 so as to movably connect the two.

Preferably, as shown in fig. 7, 8 and 9, the fixing sleeve 900 is assembled on the support plate 700 by a snap structure. The buckle structure comprises a hook 8 positioned at the upper end of the fixing sleeve 900 and a clamping hole 7 positioned on the support plate 700, wherein the hook 8 penetrates through the clamping hole 7 from bottom to top and is hooked on the upper surface of the support plate 700, so that the fixing sleeve 900 is connected with the support plate 700. Such an arrangement facilitates assembly between the sharpener 400, the movable sleeve 600, the elastic member 800 and the fixed sleeve 900. In the assembling process, the pencil sharpener 400, the movable sleeve 600, the elastic member 800 and the fixing sleeve 900 may be assembled together according to the mutual connection relationship, and then the fixing sleeve 900 may be fastened to the support plate 700.

Meanwhile, a limit structure for limiting the amplitude limiting movement of the movable sleeve 600 is arranged between the fixed sleeve 900 and the movable sleeve 600. The lowest position of the movable sleeve 600 moving downwards can be controlled through the limiting structure to ensure that the movable sleeve 600 keeps reasonable acting force on the cutter frame 10.

More specifically, the limiting structure comprises a first retaining ring 901 at the lower end of the fixed sleeve 900 and a second retaining ring 601 at the middle part of the movable sleeve 600, and the second retaining ring 601 is located inside the first retaining ring 901 to limit the movable sleeve 600 from separating from the fixed sleeve 900.

Moreover, in the moving process of the movable sleeve 600, the insertion part C at the upper end of the movable sleeve 600 always extends into the pen inlet channel 500, the outer surface of the peripheral side part of the movable sleeve 600, the inner surface of the peripheral side part of the fixed sleeve 900, the lower surface of the support plate 700 and the upper surface of the second retainer ring 601 of the movable sleeve 600 jointly enclose a height-variable accommodating chamber K, the elastic member 800 is installed in the accommodating chamber K, and two ends of the elastic member 800 are abutted between the support plate 700 and the second retainer ring 601. Preferably, the elastic member 800 is a spring, and the spring is coaxially sleeved outside the movable sleeve 600.

Therefore, the second retainer 601 of the movable sleeve 600 can move up and down in the area of the first retainer 901 and the support plate 700 or the restriction, and the distance of upward movement is limited by the maximum compression amount of the elastic member 800. And, the elastic member 800 generates a downward force to the movable sleeve 600 through the second retainer ring 601.

As shown in fig. 8 and 9, the pen feeding end 12 of the knife holder 10 preferably includes a planar end wall P, and the middle of the planar end wall P is provided with a connecting wall Y protruding upward. Preferably, the connecting wall Y is a wall of the pen feeding hole of the tool holder 10, and an outer contour of the connecting wall Y is matched with an inner cavity of the movable sleeve 600.

And, the lower end of the movable sleeve 600 is provided with a cavity into which the connection wall Y is inserted, and the lower end of the movable sleeve 600 is in close contact with the planar end wall P by the elastic member 800.

Further preferably, the bottom end of the knife rest 10 is provided with a bottom plate D, the center of the bottom plate D is provided with a shaft hole R, and the output shaft 203 of the driving assembly extends out of the through hole of the transverse partition plate 3 and is inserted into the shaft hole, so that the detachable connection between the knife rest 10 of the pencil sharpener 400 and the driving assembly is realized.

Preferably, the shaft hole is a square hole, the end of the output shaft 203 is a square cylinder matched with the square hole, the square cylinder is inserted into the square hole to enable the square hole to move axially to release the connection relationship, but the square cylinder and the square hole cannot rotate radially to enable the output shaft 203 to drive the pencil sharpener 400 to rotate synchronously.

When the user opens the hatch 4 to clean the first chamber 101 or replace the pencil sharpener 400, in order to prevent the pencil sharpener 400 from rotating and cutting the fingers of the user or the pencil sharpener 400 from being thrown out, a safety protection system of the electric pencil sharpener is provided in the embodiment.

As shown in fig. 4, 10 and 11, the safety protection system includes the housing 100, the motor 201, the battery 300, the pencil sharpener 400 and the pencil feeding channel 500. The pen inlet channel 500 is provided with a trigger switch 21 for starting the motor 201, and when a pen is inserted into the pen inlet channel 500 to the trigger switch 21, the trigger switch 21 is turned on. When the pen exits the pen entry passage 500 away from the trigger switch 21, the trigger switch 21 is turned off. Moreover, a front switch 22 is disposed inside the hatch 4 of the housing 100, and the closing of the hatch 4 causes the conduction of the front switch 22; the hatch 4 is opened so that the front switch 22 is opened. The motor 201, the battery 300, the trigger switch 21 and the front-mounted switch 22 are connected in series to form a loop. The battery 300 is connected into the circuit by a conductive member 301. That is, only when the hatch 4 is closed, the pen is inserted into the pen passage 500 to close the circuit, so that the motor 201 is supplied with power from the battery 300 to drive the sharpener 400.

Preferably, the trigger switch 21 and the front switch 22 are microswitches. Further preferably, a trigger rod contacting with the front switch 22 is disposed on the inner side of the door 4, and when the door 4 is closed, the door 4 touches the front switch 22 through the trigger rod.

Of course, the skilled person can also arrange a controller in the electric pencil sharpener, and the trigger switch 21, the front switch 22, the motor 201 and the battery 300 are not connected in series, but the trigger switch 21 and the front switch 22 are connected in parallel in the circuit. However, the trigger switch 21 and the front switch 22 are both in communication with the controller, and the controller will control the motor 201 to operate the motor 201 only when the controller receives the on signals of the trigger switch 21 and the front switch 22 at the same time.

It is right above the utility model provides a safety protection system and electric penknife have carried out detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been elucidated, and the explanation of above embodiment only is used for helping the assistant the utility model discloses and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The safety protection system is applied to the electric pencil sharpener and is characterized by comprising a shell, a motor, a battery, a pencil sharpener and a pencil feeding channel, wherein the motor is used for driving the pencil sharpener to rotate, the battery provides energy for the motor, the pencil feeding channel is provided with a trigger switch for starting the motor, a cavity for mounting the pencil sharpener is arranged in the shell, the shell corresponding to the cavity is provided with a cabin door, the inner side of the cabin door is provided with a front switch, the battery, the motor, the trigger switch and the front switch are connected in series to form a loop, and the cabin door is closed to enable the front switch to be conducted; the hatch is opened to turn off the front switch.

2. The safety protection system of claim 1, wherein the trigger switch and the pre-switch are micro-switches.

3. The safety protection system according to claim 1, wherein a trigger rod contacting with the front switch is disposed at an inner side of the door, and when the door is closed, the door contacts with the front switch through the trigger rod.

4. The safety protection system of claim 1, wherein a gear assembly is disposed between the motor and the sharpener.

5. The safety protection system of claim 1, wherein said sharpener comprises a holder and a blade mounted on said holder, said blade being mounted on said holder by a screw.

6. The safety protection system of claim 1, wherein said battery is a disposable battery or a rechargeable battery.

7. The safety shield system of claim 1 wherein the sharpener is separated from the motor by a partition.

8. The safety shield system of claim 1 wherein said chamber is configured as a chip collection cassette, said door is transparent or translucent, and said door is attached to a side of said housing by a snap-fit arrangement.

9. The safety protection system is applied to the electric pencil sharpener and is characterized by comprising a shell, a motor, a battery, a pencil sharpener, a pencil feeding channel and a controller, wherein the motor is used for driving the pencil sharpener to rotate, the battery provides energy for the motor, the controller controls the opening and closing of the motor, the pencil feeding channel is provided with a trigger switch for starting the motor, a cavity for mounting the pencil sharpener is arranged in the shell, a hatch door is arranged on the shell corresponding to the cavity, a front switch is arranged on the inner side of the hatch door, and the hatch door is closed to enable the front switch to be conducted; the controller controls the motor to run when the controller receives the conducting signals of the trigger switch and the front switch at the same time.

10. An electric pencil sharpener, characterized by comprising a safety protection system as claimed in any one of claims 1-9.

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