CN209616725U - a pencil with an eraser - Google Patents

Abstract

The utility model discloses a pencil with a rubber, which comprises a graphite lead core, a pen holder and a rubber sheath. The graphite lead is set in the pen barrel. The pen holder is cut with two cut surfaces along the long axis of the pen holder cylinder, and the cross section of the pen holder formed by the cut surfaces includes a first arc, a second arc, a first tangent and a second tangent. The end of the first arc is connected to the beginning of the first tangent. The tail end of the first tangent is connected with the head end of the second arc. The tail end of the second arc is connected to the head end of the second tangent. The tail end of the second tangent is connected to the head end of the first arc. There is a groove on the rubber sleeve, the inner wall of the groove matches the outer surface of the pen holder, and the rubber sleeve is arranged on the first end of the pen holder. The connection between the rubber sheath and the penholder is achieved through the friction between the penholder and the inner wall of the rubber sheath. Metal components are not practical, which reduces the safety risk and environmental protection risk of pencil use. At the same time, the design of two cut surfaces can prevent the pencil from rolling during the writing process. falling phenomenon.

Description

a pencil with an eraser

technical field

The utility model belongs to the field of stationery, in particular to a pencil with an eraser.

Background technique

People with writing needs, especially primary school students and scientific researchers, often need to use pencils and erasers. As a kind of stationery, the pencil is divided into three development stages, namely graphite, wooden pen holder, and capped pencil. The pencil with eraser that is widely produced and used at present, the eraser is connected with metal and pencil, and the pencil body is wood cylinder or hexagonal prism. This kind of rubber pencil in the prior art is convenient and practical, but there are still some shortcomings that can be optimized: 1. The production and disposal of the metal aluminum foil at the joint will cause heavy metal pollution. Or there is the problem of easy slipping in the use of prisms.

Utility model content

The technical problem to be solved by the utility model is to provide a pencil with an eraser, so as to reduce the safety risk and environmental protection risk of pencil use and achieve the effect of preventing rolling.

For solving the problems referred to above, the technical scheme of the utility model is:

A pencil with rubber of the utility model comprises a graphite lead core, a pen holder, and a rubber sheath;

The graphite lead core is arranged in the pen holder;

The penholder is cut with two tangent planes along the long axis of the penholder cylinder, and the cross section of the penholder formed by the tangent planes includes a first arc, a second arc, a first tangent and a second tangent;

The tail end of the first arc is connected to the head end of the first tangent;

The tail end of the first tangent is connected with the head end of the second arc;

The tail end of the second arc is connected to the head end of the second tangent;

The tail end of the second tangent is connected to the head end of the first arc;

A groove is formed on the rubber sheath, the inner wall of the groove fits the outer surface of the penholder, and the rubber sheath is arranged on the first end of the penholder.

In the pencil with rubber of the utility model, the arc angles corresponding to the first tangent line and the second tangent line are both α, 50°≤α≤60°; the arc angles corresponding to the second arc The angle is β, 30°≤β≤36°.

In the pencil with eraser of the utility model, the length of the pen holder is 175-180 mm, and the diameter of the pen holder is 7.5-8.5 mm.

In the pencil with eraser of the utility model, the material of the pen holder is logs or other wood mixed pressing materials.

In the pencil with rubber of the utility model, the thickness of the rubber sheath is 2-5 mm, the length is 10-20 mm, and the depth of the groove is 5-10 mm.

In the pencil with rubber of the utility model, the diameter of the groove of the rubber sheath can be enlarged by 0.5mm compared with the pen holder, and a plurality of protruding points of 0.5mm are arranged on the inner wall of the groove.

Compared with the prior art, the utility model has the following advantages and positive effects due to the adoption of the above technical scheme:

An embodiment of the utility model realizes the connection between the rubber sheath and the pen sheath through the friction force between the penholder and the inner wall of the rubber sheath, and does not use metal components, which reduces the safety risk and environmental protection risk of the pencil. During the process, the pencil rolls down.

Description of drawings

Fig. 1 is the overall schematic diagram of the pencil with rubber of the utility model;

Fig. 2 is the overall front view of the pencil with eraser of the present utility model;

Fig. 3 is the sectional view of the penholder of the pencil with rubber of the utility model;

Fig. 4 is the schematic diagram of the rubber cover of the pencil with rubber of the utility model;

Fig. 5 is the top view of the penholder of the pencil with eraser of the present utility model;

Fig. 6 is the top view of the rubber case of the pencil with eraser of the present invention.

Explanation of reference signs: 1: rubber sheath; 2: pen holder; 3: first arc; 4: first tangent; 5: second arc; 6: second tangent; 7: bump; 8: graphite lead core.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, a kind of pencil with eraser that the utility model proposes is described in further detail. According to the following description and claims, the advantages and features of the utility model will be more clear.

Referring to Fig. 1 to Fig. 6, in one embodiment, a pencil with eraser of the present utility model includes a graphite lead core 8, a pen holder 2, and a rubber sheath 1. Graphite lead core 8 is located in penholder 2. The pen holder 2 is cut with two cut surfaces along the long axis of the pen holder 2 cylinder, and the cross section of the pen holder 2 formed by the cut surfaces includes a first arc 3 , a second arc 5 , a first tangent 4 and a second tangent 6 . The tail end of the first arc 3 is connected with the head end of the first tangent line 4 . The tail end of the first tangent line 4 is connected with the head end of the second arc 5 . The tail end of the second arc 5 is connected with the head end of the second tangent line 6 . The tail end of the second tangent 6 is connected with the head end of the first arc 3 . There is a groove on the rubber sheath 1 , the inner wall of the groove matches the outer surface of the pen holder 2 , and the rubber sheath 1 is arranged on the first end of the pen holder 2 . The connection between the rubber case 1 and the pen case 2 is realized through the friction force between the pen shaft 2 and the inner wall of the rubber case 1. No metal components are used, which reduces the safety risk and environmental protection risk of pencil use. At the same time, the design of two cut surfaces can prevent the writing process Pencil rolls down. When in use, put the rubber sleeve 1 on one end of the penholder 2, and sharpen the other end for writing. When erasing is required, you can turn over the pencil and use the rubber sleeve 1 to erase. The integrated rubber sleeve 1 is convenient to use and helps In order to improve the efficiency of learning and work, the design of the two cut surfaces can better prevent the pencil from rolling down during the writing process, and at the same time, it can effectively improve the comfort of the grip and reduce the fatigue of the grip.

Further, referring to FIG. 3 , the arc angles corresponding to the first tangent 4 and the second tangent 6 are both α, 50°≤α≤60°. The arc angle corresponding to the second arc 5 is β, 30°≤β≤36°.

Further, the length of the pen holder 2 is 175-180 mm, and the diameter of the pen holder 2 is 7.5-8.5 mm.

Preferably, the material of the pen holder 2 is logs or other wood mixed pressed materials.

Further, the thickness of the rubber sheath 1 is 2-5 mm, the length is 10-20 mm, and the depth of the groove is 5-10 mm.

Further, the diameter of the groove of the rubber sheath 1 can be enlarged by 0.5mm compared with the pen holder 2, and several bumps 7 protruding 0.5mm are set on the inner wall of the groove. By setting the bumps 7, the frictional force can be increased and the fixing force of the rubber sheath 1 can be improved.

Preferably, the diameter of the pen holder 2 is 8mm. The arc angle α corresponding to the first tangent 4 and the second tangent 6 is 55°, and the arc angle β corresponding to the second arc 5 is 35°.

Preferably, there are six bumps 7 with a protrusion of 0.5mm arranged on the inner wall of the groove.

The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings, but the present utility model is not limited to the above embodiments. Even if various changes are made to the utility model, if these changes fall within the scope of the claims of the utility model and equivalent technologies thereof, they still fall within the protection scope of the utility model.

Claims (6)

1. A pencil with rubber is characterized in that it comprises graphite lead, penholder, rubber sheath; The graphite lead core is arranged in the pen holder; The penholder is cut with two tangent planes along the long axis of the penholder cylinder, and the cross section of the penholder formed by the tangent planes includes a first arc, a second arc, a first tangent and a second tangent; The tail end of the first arc is connected to the head end of the first tangent; The tail end of the first tangent is connected with the head end of the second arc; The tail end of the second arc is connected to the head end of the second tangent; The tail end of the second tangent is connected to the head end of the first arc; A groove is formed on the rubber sheath, the inner wall of the groove fits the outer surface of the penholder, and the rubber sheath is arranged on the first end of the penholder. 2. according to claim 1 described pencil with eraser, it is characterized in that, the arc angles corresponding to the first tangent and the second tangent are α, 50°≤α≤60°; The arc angle corresponding to the second arc is β, 30°≤β≤36°. 3. The pencil with eraser according to claim 1, characterized in that, the length of the pen holder is 175-180 mm, and the diameter of the pen holder is 7.5-8.5 mm. 4. The pencil with eraser according to claim 1, characterized in that, the material of the pen holder is logs or other wood mixed pressing materials. 5. The pencil with eraser according to claim 1, characterized in that, the thickness of the rubber sheath is 2-5mm, the length is 10-20mm, and the depth of the groove is 5-10mm. 6. The pencil with eraser according to claim 5, wherein the diameter of the groove of the rubber sheath can be enlarged by 0.5mm compared to the penholder, and several protrusions are arranged on the inner wall of the groove. 0.5mm bumps.