Anti-drop pen shell

Abstract

The utility model belongs to the technical field of stationery, particularly relates to an anti-drop pen shell, and aims to solve the problems that when an existing pen drops, a pen point of a pen core is damaged by collision, the pen core is damaged and cannot be used, the use cost is increased, and resource waste is caused, the following scheme is provided: the anti-drop pen shell comprises an outer shell and an inner shell, the outer shell is movably sleeved on the surface of the inner shell, and the inner shell is sleeved on the surface of the outer shell; external threads are arranged at the front and rear ends of the surface of the shell; the positioning assembly is arranged between the outer shell and the inner shell and used for positioning the outer shell and the inner shell; a pressing base is fixed to the surface of the inner shell, a sliding groove used for sliding limiting of the pressing base is formed in the outer shell, and the surface of the outer shell is movably sleeved with an outer arch ring used for blocking the sliding groove. The utility model relates to a pen shell device which enables a pen point to retract through collision and prevents the pen point from being broken, and aims to solve the problem that a pen cannot be used in time after being broken and reduce the cost of replacing a pen refill.

Description

Technical Field

[0001] The utility model relates to the technical field of stationery, in particular to an anti-fall pen case. Background Art

[0002] The pen is a great invention of mankind. It is a tool for writing or drawing. It is mostly used to draw words, symbols or pictures on paper or other solid surfaces by using the pen tip to transfer colored solids or liquids (ink).

[0003] The position of the pen core in the prior art is fixed. When the pen falls, the impact will damage the tip of the pen core, making the pen core damaged and unusable. The damaged pen core often still contains a lot of ink, which increases the cost of use and wastes resources. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that when a pen falls, the impact may damage the tip of the pen core, making the pen core damaged and unable to be used, increasing the use cost and causing waste of resources, and thus proposes an anti-fall pen shell.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The anti-drop pen case comprises an outer shell and an inner shell, wherein the outer shell is movably sleeved on the surface of the inner shell, and both the front and rear ends of the outer shell surface are provided with external threads;

[0007] A positioning component, the positioning component is arranged between the outer shell and the inner shell for positioning the outer shell and the inner shell;

[0008] A pressing seat is fixed on the surface of the inner shell, a sliding groove for the pressing seat to slide and limit is provided in the outer shell, and an outer arch ring for sealing the sliding groove is movably sleeved on the surface of the outer shell;

[0009] A pen tip cover, wherein a pen core for writing is arranged in the inner shell, and an annular protrusion is arranged at the tip of the pen core, and the annular protrusion is used to prevent the pen core from being excessively sunk into the inner shell and unable to be normally extended, and the pen tip cover is threadedly connected to the lower end of the outer shell;

[0010] An adjusting bolt is fixed to the top of the inner shell, a spring is fixed to the top of the outer shell, the spring is sleeved on the surface of the adjusting bolt, an adjusting cap is arranged on the surface of the adjusting bolt, and the side end of the spring is in compression contact with the side end of the adjusting cap.

[0011] In a possible design, the positioning assembly includes two tooth grooves opened in the outer shell, and two bridge teeth are fixed on the surface of the inner shell, and the two bridge teeth are respectively engaged with the two tooth grooves.

[0012] In a possible design, the adjusting cap is threadedly connected to the surface of the adjusting bolt.

[0013] In a possible design, the side end of the pressing seat is a concave arc surface.

[0014] In a possible design, anti-slip grooves are provided in the concave curved surface of the pressing seat.

[0015] In a possible design, an extension shell is threadedly connected to the upper end of the outer shell surface, and the extension shell is sleeved on the surface of the adjusting bolt.

[0016] In the present application, the inner shell is inserted into the outer shell by aligning the pressing seat with the sliding groove; the pen core is inserted into the inner shell; the outer shell arch ring is sleeved on the front end of the outer shell; the outer shell is inserted into the pen head cover and tightened; the spring is sleeved on the surface of the adjusting bolt at the side end of the inner shell; the adjusting cap is threadedly connected to the surface of the adjusting bolt and tightened to adjust the elastic strength of the spring; the extension shell is sleeved on the adjusting cap, aligned with the outer shell and tightened, so that the extension shell is sleeved on the surface of the spring and the adjusting cap.

[0017] Beneficial Effects

[0018] In the utility model, a pen shell device is provided which retracts the pen tip by impact to prevent the pen tip from being broken, and aims to solve the problem that the pen cannot be used in time after being broken, and to reduce the cost of replacing the pen core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front perspective view of the anti-fall pen case proposed by the utility model;

[0020] Figure 2 This is a three-dimensional schematic diagram of the inner shell of the anti-fall pen shell proposed by the utility model;

[0021] Figure 3 This is a three-dimensional schematic diagram of the outer shell of the anti-fall pen case proposed by the utility model;

[0022] Figure 4 This is a three-dimensional schematic diagram of the inner shell of the anti-fall pen shell proposed by the utility model after being inserted into the outer shell;

[0023] Figure 5 A cross-sectional view of the outer shell of the anti-fall pen case proposed by the utility model;

[0024] Figure 6 This is a three-dimensional schematic diagram of the pen head cover installed in the anti-fall pen shell proposed by the utility model;

[0025] Figure 7 This is a first partial cross-sectional view of the anti-fall pen case proposed by the utility model;

[0026] Figure 8 A cross-sectional view of the anti-fall pen case proposed by the utility model;

[0027] Fig. 9 The anti-fall pen case proposed by the utility model Figure 8 A partial enlarged view of point A in the middle.

[0028] In the figure: 1. outer shell; 2. inner shell; 3. pressing seat; 4. bridge teeth; 5. sliding groove; 6. pen head cover; 7. outer arch ring; 8. pen core; 9. tooth groove; 10. spring; 11. extension shell; 12. adjusting bolt; 13. adjusting cap. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Example 1

[0031] Reference Figure 1-Figure 9 , an anti-drop pen case, which is used in the field of stationery technology, comprises an outer shell 1 and an inner shell 2, the outer shell 1 is movably sleeved on the surface of the inner shell 2, and both front and rear ends of the surface of the outer shell 1 are provided with external threads;

[0032] A positioning component is provided between the outer shell 1 and the inner shell 2 for positioning the outer shell 1 and the inner shell 2;

[0033] A pressing seat 3 is fixed on the surface of the inner shell 2, a sliding groove 5 for the pressing seat 3 to slide and limit is provided in the outer shell 1, and an outer arch ring 7 for blocking the sliding groove 5 is movably sleeved on the surface of the outer shell 1;

[0034] The outer arch ring 7 is inserted into the front end of the shell 1 according to the notch of the shell 1, so that the front end of the shell 1 is fixed into a round shape, so that the pen head cover 6 can be tightened and fixed;

[0035] Press the adjusting cap 13 or push the pressing seat 3, so that the inner shell 2 drives the pen core 8 to extend out of the pen shell. When the pen is writing, the thumb presses the pressing seat 3 to generate friction between the outer shell 1 and the inner shell 2, so that the pen core 8 does not bounce back when writing;

[0036] The thumb presses the pressing seat 3 to increase the friction force to prevent the pen core 8 from being pressed back and retracted when writing. However, when the elastic force is adjusted appropriately (less than 90% of the comprehensive friction force), the pen core 8 will not retract when the pressing seat 3 is relaxed. If the elastic force is too large, the pen core 8 will retract. Too large or too small elastic force is not a correct way of use.

[0037] A pen tip cover 6 is provided inside the inner shell 2 with a pen core 8 for writing. The pen core 8 is fixed by the friction between the inner shell 2. The pen shell 2 drives the pen core 8 to extend and retract. An annular protrusion is provided at the tip of the pen core 8. The annular protrusion is used to prevent the pen core 8 from excessively sinking into the inner shell 2 and being unable to extend normally. The pen tip cover 6 is threadedly connected to the lower end of the outer shell 1;

[0038] An adjusting bolt 12 is fixed to the top of the inner shell 2, and a spring 10 is fixed to the top of the outer shell 1. The spring 10 is sleeved on the surface of the adjusting bolt 12, and an adjusting cap 13 is provided on the surface of the adjusting bolt 12. The side end of the spring 10 and the side end of the adjusting cap 13 are in compression contact; the spring 10 is sleeved on the end of the inner shell 2, and the adjusting cap 13 is tightened to squeeze the spring 10, so that when the pen core 8 is stably extended out of the pen shell, the elastic force generated by the spring 10 is smaller than the friction force generated by the bridge teeth 4 and the tooth grooves 9;

[0039] The inner shell 2 is a carrier for loading the refill 8, and the outer shell 1 is a carrier for loading the inner shell 2. The inner shell 2 is composed of a refill channel, a pressing seat 3, a bridge tooth 4 and an adjusting bolt 12. The inner shell 2 is inserted into the outer shell 1, and the spring 10 is sleeved at the end of the inner shell 2. The refill 8 is inserted in the inner shell 2, and the front end of the inner shell 2 is inserted into the nib cover 6. The outer arch ring 7 is at the front end of the outer shell 1, the nib cover 6 is connected and tightened with the outer shell 1, and the adjusting cap 13 is connected and tightened with the adjusting bolt 12 at the end of the inner shell 2. The extension shell 11 is sleeved on the adjusting cap 13, aligned with the outer shell 1 and tightened, so that the extension shell 11 is sleeved on the surface of the spring 10 and the adjusting cap 13.

[0040] Example 2

[0041] refer to Figure 1-Figure 9 , improved on the basis of Example 1: the side end of the pressing seat 3 is a concave arc surface;

[0042] The concave arc surface of the pressing seat 3 is provided with anti-slip grooves, which facilitates pressing the pressing seat 3;

[0043] An extension shell 11 is threadedly connected to the upper end of the surface of the outer shell 1 , and the extension shell 11 is sleeved on the surface of the adjusting bolt 12 .

[0044] It takes a sufficiently large impact force (expressed as force A) to damage the pen core 8 by impact. The friction between the bridge teeth 4 on the surface of the inner shell 2 and the tooth grooves 9 opened in the outer shell 1, after offsetting the elastic force of the spring 10, the remaining friction force (expressed as force B) is designed to make force B smaller than force A. The extension speed of the spring 10 is generally greater than the speed of free fall. Therefore, when the pen core 8 is impacted, the impact force reaches B first in the process of infinitely approaching A, causing the pen core 8 to retract, and the pen shell is finally collided with the impact object.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Anti-drop pen case, characterized in that: include: An outer shell (1) and an inner shell (2), wherein the outer shell (1) is movably sleeved on the surface of the inner shell (2), and both front and rear ends of the surface of the outer shell (1) are provided with external threads; A positioning component, the positioning component is arranged between the outer shell (1) and the inner shell (2) and is used to position the outer shell (1) and the inner shell (2); A pressing seat (3) is fixed on the surface of the inner shell (2), a sliding groove (5) for the pressing seat (3) to slide and limit is provided in the outer shell (1), and an outer arch ring (7) for sealing the sliding groove (5) is movably sleeved on the surface of the outer shell (1); A pen tip cover (6), wherein a pen core (8) for writing is arranged in the inner shell (2), and an annular protrusion is arranged at the tip of the pen core (8), and the annular protrusion is used to prevent the pen core (8) from excessively sinking into the inner shell (2) and being unable to extend normally, and the pen tip cover (6) is threadedly connected to the lower end of the outer shell (1); An adjusting bolt (12) is fixed to the top of the inner shell (2), and a spring (10) is fixed to the top of the outer shell (1). The spring (10) is sleeved on the surface of the adjusting bolt (12), and an adjusting cap (13) is provided on the surface of the adjusting bolt (12). The side ends of the spring (10) and the side ends of the adjusting cap (13) are in compression contact.

2. The anti-drop pen case according to claim 1, characterized in that: The positioning assembly comprises two tooth grooves (9) opened in the outer shell (1), and two bridge teeth (4) are fixed on the surface of the inner shell (2), and the two bridge teeth (4) are respectively engaged with the two tooth grooves (9).

3. The anti-drop pen case according to claim 2, characterized in that: The adjusting cap (13) is threadedly connected to the surface of the adjusting bolt (12).

4. The anti-drop pen case according to claim 1, characterized in that: The side end of the pressing seat (3) is a concave arc surface.

5. The anti-drop pen case according to claim 4, characterized in that: The concave arc surface in the pressing seat (3) is provided with anti-slip grooves.

6. The anti-drop pen case according to claim 1, characterized in that: An extension shell (11) is threadedly connected to the upper end of the surface of the outer shell (1), and the extension shell (11) is sleeved on the surface of the adjusting bolt (12).

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