CN105904879A - Intelligent pencil capable of automatically controlling lead discharging and lead discharging length - Google Patents

Abstract

The invention relates to an intelligent pencil that can automatically control the lead output and the length of the lead output, including a pen holder, a pen core and a pen cap; a core protection tube, an upper limit switch, a lower limit switch and a control mechanism are installed in the pen holder. Three pressure sensors are evenly distributed in the pen holder; a fixed spring and an electromagnetic coil are set on the outer end of the core storage tube, and a support ring is also provided between the electromagnetic coil and the cap; a movable magnet is arranged along the inner ring of the electromagnetic coil, and the The movable magnet is tightly clamped with the upper end of the storage core tube, and an iron core spring is sleeved on the outer end of the movable magnet; the control mechanism also includes an acceleration sensor; the pressure sensor, the lower limit switch, the upper limit switch, the electromagnetic The coil and the acceleration sensor are respectively electrically connected with the control mechanism. The invention can realize automatic control of the lead output and the length of the lead output, has no noise during use, low energy consumption, corrects wrong postures of holding the pen in time, and has a self-protection function.

Description

A smart pencil that can automatically control the lead and lead length

technical field

The invention relates to the field of stationery, in particular to an intelligent pencil that can automatically control lead output and lead output length.

Background technique

As a relatively trendy product, automatic smart pens are becoming more and more popular among parents and students. Currently, there are several problems with smart pencils on the market:

1. It is impossible to flexibly control the length of the lead in normal use, causing the length of the lead to be too long or too short to affect the use;

2. The power part is usually a motor, which not only has low accuracy, but also has high noise and high energy consumption;

3. The user has an incorrect posture for holding the pen, causing the lead to break due to excessive force, and develops bad habits of using the pen for a long time;

4. Because the lead is relatively thin, especially when primary school students are playing or when the pencil is dropped, the lead of the pencil cannot be received in the penholder, causing accidental injuries to people or causing waste due to the breakage of the lead.

Chinese Patent Authorization Announcement No. CN 202021966 U discloses a fall-resistant pencil, including a pencil case and a pencil lead located in the pencil case, and it also includes an electromagnet, a spring, a button battery, an acceleration sensor and a controller; the pencil lead Slidingly connected in the pencil shell; the upper end of the pencil lead is connected with the spring; the spring, electromagnet, controller, acceleration sensor, and button battery are sequentially connected through wires; the outer surface of the pencil shell is covered with an elastic material sleeve. Although the utility model utilizes the acceleration sensor and the electromagnet to control the stretching of the spring, so that the pencil lead can be shrunk into the pencil shell in time when the pencil falls, preventing the pen tip and the pencil lead from breaking, but it cannot realize automatic lead extraction, and cannot Correct writing strength in time.

Chinese Patent Application Publication No. CN 103935157 A discloses a smart writing pen structure, including a pen holder and a pen holder inside the holder, characterized in that: the pen holder includes a pen body and a threaded connection section that is detachably connected to the lower end of the pen body And the pen cap that is detachably connected to the threaded connection section, the middle part of the pen body is fixed with a working circuit panel, and a telescopic mechanism that is located in the pen body and used to drive the pen holder to expand and contract is arranged under the working circuit panel, and the lower part of the pen body There is a grip part, the grip part is provided with an induction metal sheet connected with the working circuit panel circuit, and the body of the pen under the induction metal sheet is provided with a circle of triangular protrusions to prevent the pen from being held too low. The present invention solves the problems of automatic lead extraction and poor use of the pen, but the length of the lead output cannot be adjusted, causing the lead output to be too long or too short, and the driving motor is noisy, and the energy consumption is high, resulting in a short service life of the pencil and no self-protection Features.

Contents of the invention

The technical problem to be solved by the present invention is to provide an intelligent pencil that can automatically control the lead output and lead output length, has no noise, low energy consumption, can correct the user's handwriting strength and has self-protection.

The technical scheme adopted by the present invention to solve the above-mentioned problems is to provide an intelligent pencil that can automatically control the lead output and the length of the lead output, including a pen holder, a pen core and a pen cap, and a protective sleeve that can move axially is installed inside the lower end of the pen holder. Core tube; the upper end of the core guard tube has an annular slider with an outer diameter greater than the outer diameter of the main body of the core guard tube, and there is an annular bump near the end of the slider, and the annular bump is installed on the An upper limit switch and a lower limit switch in the pen holder, the projection can touch the transmission detection parts of the upper limit switch and the lower limit switch with the sliding of the protective core tube to realize state conversion; The pen holder is located below the lower limit switch, and three pressure sensors are installed, and the three pressure sensors are evenly distributed in the pen holder around the center line, and the pressure surface of the pressure sensor is in contact with the core protection tube; The outer end of the storage core tube on the pen core is covered with a fixed spring, and an electromagnetic coil is placed outside the storage core tube at the upper end of the fixed spring. Between the electromagnetic coil and the cap, a support is provided close to the inner edge of the pen holder. Ring; between the lower end of the support ring and the electromagnetic coil, a movable magnet with a T-shaped cross section is provided. The sliding sleeve with the inner ring of the electromagnetic coil axially sliding, the middle of the sliding sleeve is provided with an inner cavity tightly clamped with the upper stop end of the storage core tube, and an iron core spring is sleeved on the outer end of the sliding sleeve, The two ends abut against the guide bump and the electromagnetic coil respectively; the upper end of the pen holder is located in the cavity above the movable magnet and a control mechanism is installed in the cavity, and the control mechanism also includes an acceleration sensor; the pressure sensor, the lower limit switch , an upper limit switch, an electromagnetic coil, an acceleration sensor and are respectively electrically connected with the control mechanism.

Preferably, the protective core tube is a rubber product with moderate hardness.

Preferably, the inner diameter of the protective core tube is slightly smaller than the outer diameter of the lead core.

Preferably, the spring strength of the fixing spring is greater than that of the iron core spring.

Preferably, the upper end of the pen holder is provided with external threads, the pen cap is provided with internal threads, the upper end of the pen holder and the pen cap are connected by threads, the side of the pen cap is provided with a fixed clip, and the upper end of the pen cap is also provided with a replaceable Eraser for wiping.

Preferably, the control mechanism further includes an LED light electrically connected to the control mechanism, and the penholder corresponding to the LED light is set as a transparent window that facilitates light-transmitting observation. .

Preferably, on the outside of the pen holder, there are three grooves evenly distributed along the center line at the place where the pen is held, and the three grooves are radially interlaced with the pressure sensor.

A kind of intelligent pencil that can automatically control the lead output and lead output length by implementing the present invention has the following beneficial effects:

1. Through the smart pencil that can automatically control the lead and the length of the lead, it can automatically detect whether the lead is produced in normal use, and can automatically control the lead and the length of the lead.

2. Through the intelligent pencil that can automatically control the lead output and the length of the lead output, it is driven by electromagnetic force, so there is no noise in use and the energy consumption is extremely low.

3. Through the intelligent pencil that can automatically control the lead and the length of the lead, it can correct the incorrect posture of holding the pen in time, alarm and notify the user in time to avoid excessive force on the lead and break the lead, and develop a good habit of using the pen.

4. Through the intelligent pencil that can automatically control the lead output and the length of the lead output, it can prevent students from accidentally injuring students while playing or damaging the lead core after the pencil falls, so as to protect students and smart pencils.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment;

Fig. 1 is the structural representation of preferred embodiment of the present invention;

In the accompanying drawings: 1, lead core, 2, protective core tube, 21, slide block, 22, bump, 3, pressure sensor, 4, pen holder, 41, groove, 5, lower limit switch, 6, upper limit switch , 7, pen core, 71, storage core tube, 8, fixed spring, 9, electromagnetic coil, 10, iron core spring, 11, movable magnet, 110, guide bump, 111, sliding sleeve, 112, inner cavity, 12, support ring, 13, control mechanism, 14, pen cap, 141, pen holder, 15, eraser;

detailed description

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

As shown in Figure 1, in a preferred embodiment of the present invention, a kind of smart pencil that can automatically control the length of the lead and the length of the lead is provided, including a pen holder 4, a pen core 7 and a pen cap 14; The protective core tube 2 that can move axially; the upper end of the protective core tube 2 has an annular slider 21 whose outer diameter is greater than the outer diameter of the main body of the protective core tube, and there is an annular protrusion 22 at the end close to the slider 21, and the annular protrusion 22 is on the shaft. There is an upper limit switch 6 and a lower limit switch 5 installed in the penholder within the range of movement, and the projection 22 can touch the transmission detection parts of the upper limit switch 6 and the lower limit switch 5 with the sliding of the core guard tube 2 Touch to realize the state transition; in the pen holder 4, located below the lower limit switch 5, three pressure sensors 3 are installed, and the three pressure sensors 3 are evenly distributed in the pen holder 4 around the center line, and the pressure surface of the pressure sensor 3 and the protective core The tubes 2 are in contact with each other; the outer end of the storage core tube 71 on the pen core 7 is covered with a fixed spring 8, and the upper end of the fixed spring 8 is located outside the storage core tube 71 and is also covered with an electromagnetic coil 9, between the electromagnetic coil 9 and the cap 14, A support ring 12 is also provided close to the inner edge of the pen holder 4; a movable magnet 11 with a T-shaped cross section is arranged between the lower end of the support ring 12 and the electromagnetic coil 9, and a movable magnet 11 is provided at the rear end of the movable magnet 11 to slide axially along the support ring 12. The guide bump 110, the front end of the movable magnet has a sliding sleeve 111 that can slide axially along the inner ring of the electromagnetic coil 9, and the middle of the sliding sleeve 111 is provided with an inner cavity that is tightly clamped with the upper stop end of the storage core tube 71 112, an iron core spring 10 is sleeved on the outer end of the sliding sleeve 111, and the two ends respectively abut against the guide bump 110 and the electromagnetic coil 9; the inner upper end of the pen holder 4 is located in the cavity above the movable magnet 11 and a control mechanism is installed 13. The control mechanism 13 also includes an acceleration sensor and an LED light; the pressure sensor 3, the lower limit switch 5, the upper limit switch 6, the electromagnetic coil 9, the acceleration sensor and the LED light are electrically connected to the control mechanism 13 respectively.

Preferably, in order to be comfortable to use in application, the protective core tube 2 is a rubber product with moderate hardness.

Preferably, when the inner diameter of the core-protecting tube 2 is slightly smaller than the outer diameter of the lead core 1, the movement of the lead core 1 can drive the core-protecting tube 2 to move simultaneously, so as to detect the core-out state of the lead core.

Preferably, in order to prevent the electromagnetic coil 9 from moving axially in the pen holder 4 and frequently colliding with the support ring 12, the spring strength of the fixed spring 8 needs to be greater than the spring strength of the iron core spring 10, so that the electromagnetic coil 9 is fastened against the supporting ring 12. Ring 12 on.

Preferably, for better convenience and practicality, the upper end of the pen holder 4 is provided with an external thread, and the pen cap 14 is provided with an internal thread, the upper end of the pen holder 4 and the pen cap 14 are connected by threads, and the side of the pen holder 14 is provided with a fixed pen clip 141, and the pen cap 14 upper ends are also provided with a replaceable rubber 15 for wiping.

Preferably, the control mechanism 13 also includes an LED light that is electrically connected to the control mechanism 13. The pen holder 4 is provided with a transparent window that is conducive to light-transmitting observation at the place corresponding to the LED light. Pay attention to the strength of the pen.

Preferably, in order to better measure the stress of the core-protecting tube 2, there are three grooves 41 evenly distributed along the center line on the outside of the pen holder 4, and the pen holder is provided with three grooves 41 uniformly distributed along the center line. The three grooves 41 are radially aligned with the pressure sensor 3 The distribution is staggered, so that there is one pressure sensor 3 in the positive direction of pressure, and the detection accuracy is the highest.

When the smart pencil has no lead core 1, the user normally holds the pen and presses down on the mechanical pencil, so that the core protection tube 2 at the lower end of the pen core 7 slides inward, and the protrusion 22 on the core protection tube 2 is aligned with the upper limit after sliding. The contact of the switch 6 touches, the control mechanism 13 gets a signal, and connects the positive pulse working current to the electromagnetic coil 9 through the circuit, the movable magnet 11 is moved downward by the magnetic field attraction, and the movable magnet 11 compresses the iron core spring 10 and presses the sleeve The storage core tube 71 placed inside and the pen core 7 connected to the storage core tube 71 make the lead core 1 in the storage core tube 71 move outward once, and then the movable magnet 11 is subjected to the stretching elastic force of the iron core spring 10 , return to the initial position, and complete a working cycle. The control mechanism 13 always turns on the positive pulse working current before receiving other signals.

Further, when the lead core 1 touches the protective core tube 2, since the protective core tube 2 and the lead core 1 are interference fit, the lead core 1 pushes the protective core tube 2 to slide outward, and when the protective core tube 2 When the bump 22 slides and touches the lower limit switch 5 contacts, the control mechanism 13 stops working. At this time, the lead 1 has not stretched out. Now, continue to press the active pencil downwards, and the control mechanism 13 works again until the lead 1 is stretched out. The core 1 protrudes from the protective core tube 2 .

Further, in normal writing, as the wear and tear of the lead core 1 shortens, the protective core tube 2 also slides inward. When the protrusion 22 on the core protective tube 2 touches the upper limit switch 6 again, the control mechanism 13 again Control out the lead until the lead core 1 sticks out.

Further, since a pressure sensor 3 is provided at the inner side of the lower end of the pen holder 4, the pressure of the user is maintained within a certain normal range when writing, and the LED light in the control mechanism 13 does not work. The core protector 2 is under too much force, and the pressing pressure exceeds the normal range. The control mechanism 13 sends a light signal through the LED light installed on the control panel to notify the user that the writing pressure is too high, so that the user can pay attention to the writing strength at any time.

Further, an acceleration sensor is also installed in the control mechanism 13. When the propelling pencil falls freely or is thrown, the control mechanism 13 controls the electromagnetic coil 9 to turn on the reverse current according to the sensor signal, and the movable magnet 11 slides backward by the repulsive force of the magnetic field. Drive the pen core 7 through the core storage tube 71, the pen core 7 drives the lead core 1, and the lead core 1 drives the core protection tube 2 to shrink back, so as to protect the lead core 1 from damage and prevent the pen tip from hurting people. At the same time, the upper limit switch 6 and the lower limit switch 5 can be realized by using different limit switch devices according to the appearance of the product.

In summary, it is only a preferred embodiment of the present invention, and is not used to limit the scope of the present invention. Through the above description, relevant workers can make various changes without departing from the scope of the technical idea of the present invention. and modifications. The technical scope of the present invention is not limited to the contents of the description, and all the so-called equivalent changes and modifications according to the shape, structure, characteristics and spirit of the claimed scope of the present invention shall be included in the scope of the claims of the present invention.

Claims (7)

1. can automatically control out lead and go out the intelligent pencil of lead length, including penholder (4), pen core (7) and the cap for brush (14)；Its It is characterised by:

The internally installed axially movable retaining core pipe (2) in described penholder (4) lower end；Described retaining core pipe (2) upper end has one External diameter, more than the ring slider (21) of retaining core pipe body outer diameter, has an annular lug (22) in the one end near slide block (21), Annular lug (22) has the upper limit position switch (6) being arranged in described penholder and a lower limit to open in the range of moving axially Closing (5), described projection (22) can be with described upper limit position switch (6) and described lower position switch with the slip of retaining core pipe (2) (5) transmission detection part is touched mutually and is realized State Transferring；

In described penholder (4), it is positioned at the lower section of described lower position switch (5), three pressure transducers (3) are installed, three In individual pressure transducer (3) is distributed on described penholder (4) around centrage, and the compression face of described pressure transducer (3) with Described retaining core pipe (2) contacts；

Core storage tube (71) outer end on described pen core (7) is cased with one and fixes spring (8), is positioned in fixing spring (8) upper end Core storage tube (71) is the most also cased with a solenoid (9), between solenoid (9) and the cap for brush (14), is close to described penholder (4) along being additionally provided with a support ring (12) in；

The T-shaped movable magnet in a cross section (11), described activity it is provided with between support ring (12) lower end and solenoid (9) The rear end of Magnet (11) has one along support ring (12) guiding projection in axial sliding (110), the front end of described movable magnet Having one can be along solenoid (9) inner ring sliding sleeve in axial sliding (111), and the centre of described sliding sleeve (111) sets Having the inner chamber (112) with the upper not-go-end tight clamping fit of core storage tube (71), an iron core spring (10) is nested with in sliding sleeve (111) Outer end, two ends abut with guiding projection (110) and solenoid (9) respectively；

Described penholder (4) inner upper end, is positioned at movable magnet (11) top cavity and is provided with controlling organization (13), described Controlling organization also includes an acceleration transducer in (13)；

Described pressure transducer (3), lower position switch (5), upper limit position switch (6), solenoid (9), acceleration sensing Device is electrically connected with controlling organization (13) respectively.

Lead can be automatically controlled out the most as claimed in claim 1 and go out the intelligent pencil of lead length, it is characterised in that described in:, protecting core Pipe (2) is the rubber that hardness is moderate.

Lead can be automatically controlled out the most as claimed in claim 1 and go out the intelligent pencil of lead length, it is characterised in that described in:, protecting core Pipe (2) internal diameter is slightly less than lead for retractable pencil (1) external diameter.

Lead can be automatically controlled out the most as claimed in claim 1 and go out the intelligent pencil of lead length, it is characterised in that: described fixing The spring strength of spring (8) is more than the spring strength of iron core spring (10).

Lead can be automatically controlled out the most as claimed in claim 1 and go out the intelligent pencil of lead length, it is characterised in that: described penholder (4) upper end is provided with external screw thread, and the cap for brush (14) is provided with female thread, penholder (4) upper end and the cap for brush (14) and passes through screw thread Connecting, the described cap for brush (14) sidepiece is provided with a pen clip fixed (141), and the cap for brush (14) upper end be additionally provided with one can The rubber for wiping (15) changed.

Lead can be automatically controlled out the most as claimed in claim 1 and go out the intelligent pencil of lead length, it is characterised in that: described control Mechanism (13) also includes arrange at a LED being electrically connected with controlling organization (13), and the corresponding LED of penholder (4) Become to be beneficial to the transparent window of translumination observation.

Lead can be automatically controlled out the most as claimed in claim 1 and go out the intelligent pencil of lead length, it is characterised in that: described penholder (4) outside, the place of holding a pen has 3 and passes with described pressure along the uniform groove (41) of centrage, three described grooves (41) Sensor (3) radially staggered distribution.