An anti-breaking lead automatic pencil

Abstract

The present invention discloses an anti-broken lead automatic pencil, comprising a penholder and a lead core, wherein one end of the penholder is connected to a pen cap, one end of the pen cap is connected to a nib, one end of the nib is connected to a lead head, one side of the inner wall of the nib is connected to a mounting bracket, the inner side of the mounting bracket is connected to a length measuring sensor, one end of the inner wall of the nib is connected to a detection mechanism and a protection mechanism, a connecting tube is slidably provided at the top of the penholder, one side of the inner wall of the penholder is connected to a limit seat, one side of the limit seat is connected to a suction-type electromagnet, the top of the connecting tube is connected to a head frame, multiple groups of button batteries are provided inside the head frame, the top of the head frame is connected to an eraser, a lead core is provided in the penholder, and one end of the lead core is connected to a lead-discharging mechanism. The present invention effectively prevents lead core from breaking, ensures applicability, ensures the use effect of the lead core, and avoids waste.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical pencils, in particular to a lead-breakage-proof mechanical pencil. Background Art

[0002] A mechanical pencil is one whose spring returns to its original position when pressure is released. Mechanical pencils are categorized by lead diameter as either coarse or fine, and by lead extraction method as drop-in, rotary, pulsating, or self-compensating. Initially designed as a replacement for conventional cutting pencils, mechanical pencils satisfy the need for convenience, as they require no frequent cutting.

[0003] However, the lead of a mechanical pencil is thinner and more fragile than that of a pencil. It is very easy to break due to excessive external force during the writing process. At present, most people who use mechanical pencils in society are minors such as primary and secondary school students. When the lead is subjected to excessive force during writing, the lead will break, affecting the use effect. At the same time, the lead length of the mechanical pencil cannot be controlled, and it is easy for the lead to be too long, which is more likely to cause the lead to break. Summary of the Invention

[0004] The object of the present invention is to provide a lead-breaking-proof mechanical pencil to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: it includes a pen barrel and a lead core, one end of the pen barrel is connected to a pen cap, one end inside the pen cap is connected to a pen head, one end of the pen head is connected to a lead connecting head, one side of the inner wall of the pen head is connected to a mounting bracket, the inner side of the mounting bracket is connected to a length measuring sensor, one end of the inner wall of the pen head is connected to a detection mechanism and a protection mechanism, a connecting tube is slidingly provided at the top of the pen barrel, one side of the inner wall of the pen barrel is connected to a limit seat, one side of the limit seat is connected to a suction-type electromagnet, the top of the connecting tube is connected to a head frame, multiple groups of button batteries are arranged inside the head frame, the top of the head frame is connected to an eraser head, a pen core is arranged in the pen barrel, and one end of the pen core is connected to a lead-discharging mechanism.

[0006] Preferably, the lead core is located in the pen core, and one end thereof passes through the lead ejection mechanism and the pen tip.

[0007] Preferably, the detection mechanism includes a rubber sleeve, a plurality of groups of wires are provided in the rubber sleeve, one end of the wires is connected to a circuit board, one side of the circuit board is connected to a plurality of detection resistors, and the detection resistors are electrically connected to the protective mechanism.

[0008] Preferably, the protection mechanism includes a fixed frame, a first electromagnet is connected to one side of the fixed frame, a protective sleeve is slidably provided on the inner ring of the fixed frame, one end of the protective sleeve is connected to a movable frame, and a second electromagnet is connected to one side of the movable frame.

[0009] Preferably, one end of the protective sleeve is sleeved with a reset spring, and the reset spring is located between the fixed frame and the movable frame. One end of the protective sleeve extends through the outside of the pen tip, and the inner ring is slidably connected to the lead core.

[0010] Preferably, the output end of the suction-type electromagnet extends through the limit seat and is electrically connected to the length measuring sensor of the mounting bracket.

[0011] Preferably, a pen clip is connected to one side of the pen barrel.

[0012] Preferably, the lead-discharging mechanism is fixedly arranged on one side of the inner wall of the pen cover.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention pushes the refill inside the pen barrel by pressing the head frame, and the refill pushes the lead-out mechanism, driving the lead bar to extend into the lead receiving head and pass through the protective mechanism and the detection mechanism. When the lead bar is in use, when the force applied to the lead bar is too great, the refill sleeve will be driven to squeeze the rubber sleeve on one side, and the wire in the rubber sleeve will be squeezed, changing the measured resistance of the detection resistor, thereby energizing the second electromagnet and the first electromagnet, so that the two are adsorbed. When the second electromagnet moves toward the fixed frame, it will drive the refill sleeve to move together, and the sliding refill sleeve will cover the lead bar to prevent the refill from breaking due to pressure. When the pressure applied to the lead bar becomes smaller, the second electromagnet and the first electromagnet are both de-energized, and the elasticity of the reset spring will lift the movable frame to reset the refill sleeve, so that the refill can continue to be used, effectively preventing the refill from breaking and ensuring the applicable effect.

[0015] The present invention also pushes the pen core and the lead-discharging mechanism to drive the lead bar outward by pressing the head frame. While the lead bar moves, the length measuring sensor detects the moving length. Once the preset length value is reached, the output end of the suction electromagnet will be controlled to pop out, blocking the connecting tube, so that the head frame cannot continue to press to discharge the lead, effectively avoiding the lead being discharged too long and causing the lead to break, ensuring the use effect of the lead core and avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an anti-breakage lead automatic pencil of the present invention;

[0017] Figure 2 This is a schematic side cross-sectional view of a lead-break-proof automatic pencil according to the present invention;

[0018] Figure 3for Figure 2 A schematic diagram of the enlarged structure of part A;

[0019] Figure 4 for Figure 3 The enlarged structural diagram of part B in the middle;

[0020] Figure 5 for Figure 2 Schematic diagram of the enlarged structure of part C in the middle.

[0021] In the figure: 1. Pen body; 2. Pen cover; 3. Pen tip; 4. Lead tip connector; 5. Mounting bracket; 6. Length measuring sensor; 7. Detection mechanism; 71. Rubber sleeve; 72. Wire; 73. Circuit board; 74. Detection resistor; 8. Protection mechanism; 81. Fixing bracket; 82. First electromagnet; 83. Protection sleeve; 84. Movable bracket; 85. Second electromagnet; 86. Return spring; 9. Connecting tube; 10. Limit seat; 11. Suction electromagnet; 12. Head frame; 13. Button battery; 14. Eraser head; 15. Pen refill; 16. Lead ejection mechanism; 17. Lead refill; 18. Pen clip. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0023] See also Figure 1-4 The present invention provides a technical solution: it includes a pen body 1 and a lead core 17, one end of the pen body 1 is connected to a pen cover 2, one side of which is provided with a controller to facilitate controlling the linkage relationship between various components, one end of the pen cover 2 is connected to a pen head 3, one end of the pen head 3 is connected to a lead head 4, one side of the inner wall of the pen head 3 is connected to a mounting bracket 5, the inner side of the mounting bracket 5 is connected to a length measuring sensor 6, one end of the inner wall of the pen head 3 is connected to a detection mechanism 7 and a protection mechanism 8, a connecting tube 9 is slidingly provided at the top of the pen body 1, a limit seat 10 is connected to one side of the inner wall of the pen body 1, a suction electromagnet 11 is connected to one side of the limit seat 10, a head frame 12 is connected to the top of the connecting tube 9, a plurality of button batteries 13 are arranged inside the head frame 12, an eraser 14 is connected to the top of the head frame 12, a pen core 15 is provided in the pen body 1, and one end of the pen core 15 is connected to a lead discharging mechanism 16, wherein the lead discharging mechanism 16 is a mature existing technology in the existing automatic pencil, so it is not described in detail.

[0024] The lead core 17 is located in the pen core 15, and one end thereof passes through the lead discharging mechanism 16 and the pen tip 3, and also passes through the lead connecting head 4, the detection mechanism 7, and the protective mechanism 8 to ensure the lead discharging effect. One end of the lead connecting head 4 is set to be expanded to facilitate the entry of the lead core 17.

[0025] The detection mechanism 7 includes a rubber sleeve 71, in which multiple groups of wires 72 are provided. One end of the wire 72 is connected to a circuit board 73, and one side of the circuit board 73 is connected to multiple detection resistors 74. The detection resistor 74 is electrically connected to the protection mechanism 8, wherein the detection mechanism 7 is electrically connected to the button battery 13. There are multiple groups of wires 72, which form a loop in the rubber sleeve 71. When squeezed, they can affect the current received by the wire 72, thereby affecting the resistance value detected by the detection resistor 74, triggering the protection mechanism 8.

[0026] The protection mechanism 8 includes a fixed frame 81, a first electromagnet 82 is connected to one side of the fixed frame 81, a protective sleeve 83 is slidably provided on the inner circle of the fixed frame 81, one end of the protective sleeve 83 is connected to a movable frame 84, and one side of the movable frame 84 is connected to a second electromagnet 85. When the power is turned on and triggered, the protective sleeve 83 will extend out of the pen tip 3, thereby increasing the protection effect on the exposed lead core 17 and preventing the lead core from breaking.

[0027] One end of the protective sleeve 83 is sleeved with a reset spring 86, which is located between the fixed frame 81 and the movable frame 84. One end of the protective sleeve 83 extends through the outside of the pen tip 3, and the inner ring is slidably connected to the lead core 17. When the pressure is restored or reduced, the protective sleeve 83 can be quickly reset to ensure the use effect.

[0028] Working principle: When the invention is in use, the lead 15 inside the pen barrel 1 is pushed by pressing the head frame 12, and the lead 15 pushes the lead discharging mechanism 16, driving the lead strip 17 to extend into the lead receiving head 4 and pass through the protective mechanism 8 and the detection mechanism 7. When the lead strip 17 is under too much force, it will drive the lead sleeve 83 to squeeze the rubber sleeve 71 on one side, and the wire 72 in the rubber sleeve 71 is squeezed, which changes the measuring resistance of the detection resistor 74, thereby energizing the second electromagnet 85 and the first electromagnet 82, so that the two are adsorbed. When the second electromagnet 85 moves toward the fixed frame 81, it will drive the lead sleeve 83 to move together, and the sliding lead sleeve 83 will cover the lead strip 17 to prevent the lead from breaking due to pressure. When the pressure on the lead strip 17 becomes smaller, the second electromagnet 85 and the first electromagnet 82 are both de-energized, and the elasticity of the reset spring 86 will lift the movable frame 84 to reset the lead sleeve 83 and continue to be used, effectively playing the role of preventing lead breakage and ensuring the applicable effect. Example

[0029] See also Figure 1-5The present invention provides a technical solution: it includes a pen barrel 1 and a lead core 17, one end of the pen barrel 1 is connected to a pen cap 2, one end of the inside of the pen cap 2 is connected to a pen head 3, one end of the pen head 3 is connected to a lead connecting head 4, one side of the inner wall of the pen head 3 is connected to a mounting bracket 5, the inner side of the mounting bracket 5 is connected to a length measuring sensor 6, one end of the inner wall of the pen head 3 is connected to a detection mechanism 7 and a protection mechanism 8, a connecting tube 9 is slidingly provided at the top of the pen barrel 1, one side of the inner wall of the pen barrel 1 is connected to a limit seat 10, one side of the limit seat 10 is connected to a suction-type electromagnet 11, the top of the connecting tube 9 is connected to a head frame 12, a plurality of button batteries 13 are arranged inside the head frame 12, an eraser head 14 is connected to the top of the head frame 12, a pen core 15 is provided in the pen barrel 1, and one end of the pen core 15 is connected to a lead discharging mechanism 16.

[0030] The output end of the suction electromagnet 11 extends through the limit seat 10 and is electrically connected to the length measuring sensor 6 of the mounting frame 5, which can effectively limit 9, causing 12 to be unable to press and push the lead, thereby limiting the lead length and avoiding core breakage caused by excessive lead length.

[0031] A pen clip 18 is connected to one side of the pen barrel 1, and a lead-discharging mechanism 16 is fixedly arranged on one side of the inner wall of the pen cover 2 to ensure a stable lead-discharging effect.

[0032] Working principle: When the invention is in use, the head frame 12 is pressed to push the pen core 15 and the lead-discharging mechanism 16 to drive the lead strip 17 outward. While the lead strip 17 moves, the length measuring sensor 6 detects the moving length. Once the preset length value is reached, the output end of the suction electromagnet 11 will be controlled to pop out, blocking the connecting tube 9, so that the head frame 12 can no longer press to discharge the lead, effectively avoiding the lead discharge length being too long, resulting in lead breakage, ensuring the use effect of the lead strip and avoiding waste.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lead-breaking prevention automatic pencil, comprising a penholder (1) and a lead core (17), characterized in that: One end of the pen barrel (1) is connected to a pen cap (2), one end of the pen cap (2) is connected to a pen head (3), one end of the pen head (3) is connected to a lead head (4), one side of the inner wall of the pen head (3) is connected to a mounting frame (5), the inner side of the mounting frame (5) is connected to a length measuring sensor (6), one end of the inner wall of the pen head (3) is connected to a detection mechanism (7) and a protection mechanism (8), the top end of the pen barrel (1) is slidably provided with a connecting tube (9), one side of the inner wall of the pen barrel (1) is connected to a limit seat (10), one side of the limit seat (10) is connected to a suction type electromagnet (11), the top end of the connecting tube (9) is connected to a head frame (12), a plurality of button batteries (13) are provided inside the head frame (12), the top end of the head frame (12) is connected to an eraser (14), a pen core (15) is provided in the pen barrel (1), and one end of the pen core (15) is connected to a lead discharging mechanism (16); The detection mechanism (7) includes a rubber sleeve (71), wherein a plurality of groups of wires (72) are provided in the rubber sleeve (71), one end of the wires (72) is connected to a circuit board (73), and one side of the circuit board (73) is connected to a plurality of detection resistors (74), and the detection resistors (74) are electrically connected to the protection mechanism (8); The protection mechanism (8) includes a fixed frame (81), a first electromagnet (82) is connected to one side of the fixed frame (81), a protection sleeve (83) is slidably provided on the inner ring of the fixed frame (81), a movable frame (84) is connected to one end of the protective sleeve (83), and a second electromagnet (85) is connected to one side of the movable frame (84); One end of the protective sleeve (83) is sleeved with a return spring (86), and the return spring (86) is located between the fixed frame (81) and the movable frame (84). One end of the protective sleeve (83) extends through the outside of the pen tip (3), and the inner ring is slidably connected to the lead core (17); The output end of the suction electromagnet (11) extends through the limit seat (10) and is electrically connected to the length measuring sensor (6) of the mounting frame (5). When the length measuring sensor (6) detects that the moving length of the lead core reaches a preset length value, the output end of the suction electromagnet (11) is controlled to pop out, blocking the connecting tube (9) so that the head frame (12) cannot continue to press out the lead.

2. The anti-breakage mechanical pencil according to claim 1, characterized in that: The lead core (17) is located in the pen core (15), and one end thereof passes through the lead outlet mechanism (16) and the pen tip (3).

3. The anti-breakage mechanical pencil according to claim 1, characterized in that: A pen clip (18) is connected to one side of the pen holder (1).

4. The anti-breakage mechanical pencil according to claim 1, characterized in that: The lead discharging mechanism (16) is fixedly arranged on one side of the inner wall of the pen cover (2).

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