CN107089071A - Sharpening-free pencil lead protective case - Google Patents

Abstract

The invention discloses a kind of sharpening-free pencil lead protective case, it is related to cultural goods technical field；Including penholder, the penholder is tubulose, and its upper end open, lower end is provided with the mouth stretched out for pencil-lead, and the stretching hole of described mouth is provided with pen core guide sleeve；The upper end of described mouth is provided with refill expansion protective case, and the refill expansion protection set upper side is provided with briquetting.The problem of present invention can solve to exempt to cut formula pencil-lead frangibility at present, pencil-lead extension elongation is uncontrollable.

Description

No-sharpen pencil refill case

technical field

The invention relates to the technical field of stationery, in particular to a protective case using a pencil lead.

Background technique

At present, the non-sharpening pencil generally puts a long pencil lead or a short pencil lead in a plastic tube, and the plastic tube is placed in the pen tube. There is a push button on the upper part of the pen tube. Every time the pencil user presses it, the push button pushes down The pressure rod moves downwards, so that the pencil lead in the plastic tube exposes a part of the pencil mouth. Since the downward distance of the pressure rod is the same every time the button is pressed, this kind of sharpening-free pencil cannot control the movement of the pencil lead from the mouth every time. In addition, because the pencil lead is placed in the plastic tube, its protruding end is exposed through the nib, and the pencil user uses too much force, and the pencil lead is easily broken, resulting in waste of the pencil lead.

Contents of the invention

The object of the present invention is to provide a protective sleeve for a non-sharp pencil lead, which can solve the problems that the current non-sharp pencil lead is easy to break and the protruding length of the pencil lead cannot be controlled.

In order to solve the above problems, the technical solution adopted by the present invention is: the pen holder is tubular, its upper end is open, and the lower end is provided with a nib for the pencil lead to protrude from, and the protruding hole of the nib is provided with a lead guide sleeve; The upper end of the nib is provided with a pen core telescopic protective sleeve, and the upper end of the pen core telescopic protective sleeve is provided with a pressing block.

In the above technical solution, a further solution may be: the telescopic protective sleeve of the pen core includes a wavy annular outer cladding layer, an inner core is arranged inside the outer cladding layer, and an inner core is provided for the pencil lead to pass through. The inner hole, a number of support rings are provided between the outer cladding and the inner core; the inner core is made of plastic or silicone material.

Further: the diameter of the inner hole of the pen shaft is larger than the maximum diameter of the telescopic protective sleeve of the pen core.

Further: the refill guide sleeve is made of plastic, and its inner hole is provided with convex points.

Further: the nib is provided with a cap.

Owing to adopting above-mentioned technical scheme, the present invention has following beneficial effect compared with prior art:

1. In the present invention, a retractable protective cover is arranged outside the pencil lead. The protective cover is made of soft material, which can effectively prevent the pencil lead from breaking due to excessive force when writing;

2. In the present invention, a pressing block is connected above the protective cover, and the pencil user can press the protective cover and the pencil lead by hand at any time to grasp the protruding length of the pencil lead.

Description of drawings

Fig. 1 is a front view of the present invention.

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

This non-sharp pencil refill protective cover as shown in Figure 1 includes a pen holder 5, which is a tubular body, and its cross-sectional shape can be circular, regular hexagonal or other shapes. In the present embodiment, the pen holder 5 has a cross-section The shape is circular, and its upper end is axially provided with a first hole 3 for a pencil lead 8 to pass through, and its lower end is provided with a nib 4; The nib 4 at the lower end stretches out, and the protruding hole of the nib 4 is provided with a pen core guide cover 7, and the pen core guide cover 7 is made of plastics, and can also be made of silica gel or other soft materials in other embodiments; The inner hole of the guide sleeve 7 is provided with a raised point, and the setting of the raised point is to prevent the pencil lead 8 from falling easily from the lead guide sleeve 7, and the diameter of the inner hole of the lead guide sleeve 7 is slightly larger than the diameter of the pencil lead 8. The outside of the pencil lead 8 is provided with a pen core telescopic protective cover 2, and the pen core telescopic protective cover 2 includes an outer cladding 2-1 arranged on the outside. Inner core 2-3, the inner core 2-3 is provided with the inner hole 2-5 for the pencil lead to pass through, and several support rings are arranged between the outer cladding 2-1 and the inner core 2-3, and the support rings are divided into large support rings. Ring 2-2 and small support ring 2-4, the large support ring 2-2 is located at the larger diameter of the pen core telescopic protective cover 2, and the small support ring 2-4 is located at the smaller diameter of the pen core telescopic protective cover 2, The large support ring 2-2 and the small support ring 2-4 are arranged at intervals; the telescopic protective sleeve 2 of the pen core can be compressed and stretched, and the inner core 2-3 is made of plastic or silicone material.

The upper end of the pen core telescopic protective cover 2 is provided with a pressing block 1, and the lower part of the pressing block 1 is provided with a circular groove, and the upper end of the pen core telescopic protective cover 2 is stuck in the circular groove; the upper end of the pressing block 1 has a cylindrical convex platform, the diameter of the cylindrical boss is slightly smaller than the diameter of the first hole 3, after the pen core telescopic protective cover 2 is indented into the first hole 3 of the pen holder 5, the cylindrical boss of the pressing block 1 can be used to press the pen core telescopic protective cover 2 Move down with the pencil lead 8; the diameter of the first hole 3 of the penholder 5 is greater than the maximum diameter of the pen core telescopic protective cover 2;

Claims (5)

1. A pencil refill protective cover without sharpening is characterized in that: it comprises a pen holder, the pen holder is tubular, its upper end is open, and the lower end is provided with a nib for the pencil lead to stretch out, and the protruding hole of the nib is provided with There is a pen core guide sleeve; the upper end of the pen mouth is provided with a pen core telescopic protective sleeve, and the upper end of the pen core telescopic protective sleeve is provided with a pressing block. 2. The non-sharpening pencil refill protective sleeve according to claim 1, characterized in that: said refill telescopic protective sleeve comprises a wavy annular outer cladding, said outer cladding is provided with an inner core, said inner core There is an inner hole for the pencil core to pass through, and several supporting rings are arranged between the outer cladding and the inner core; the inner core is made of plastic or silicone material. 3. The non-sharp pencil refill protective sleeve according to claim 1 or 2, wherein the diameter of the inner hole of the pen shaft is larger than the maximum diameter of the telescopic protective sleeve for the refill. 4. The non-sharpening pencil refill protective sleeve according to claim 3, characterized in that: the refill guide sleeve is made of plastic, and its inner hole is provided with bumps. 5. The non-sharp pencil refill protective case according to claim 3, wherein the nib is provided with a cap.