CN201849094U

CN201849094U - Pencil for students in school

Info

Publication number: CN201849094U
Application number: CN2010205355727U
Authority: CN
Inventors: 谭金维
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-09-16
Filing date: 2010-09-16
Publication date: 2011-06-01
Anticipated expiration: 2020-09-16

Abstract

The utility model discloses a pencil for students in a school, which comprises a pencil holder and a pencil lead arranged in a central hole of the pencil holder; and the outer circle of a cone at the front end of the pencil holder where contracting grooves (3) are axially formed is correspondingly combined and locked with the conical surface of a conical hole for locking an inner cavity of a pencil stub through threads, so that the pencil lead (1) arranged in the central hole of the pencil holder is clamped and firmly fixed. By adopting the structure that the outer circle at the front end of the pencil holder is combined and locked with the conical surface of the conical hole for locking the inner cavity of the pencil stub through the thread, compared with the prior art, the pencil has the advantages that the number of the parts in connection is reduced, the coaxiality error of the parts during the manufacturing and/or assembly process is reduced, and the pencil lead arranged in the central hole of the pencil holder is clamped and firmly fixed under the even force applied to the surface of the outer circle; and by adopting the pencil, the pencil lead is not easily broken by a student during the recording or writing process and the quality of learning of students is obviously improved.

Description

The pencil that a kind of school student is used

(1) technical field: the utility model relates to student appliance; Be specifically related to the pencil that a kind of school student is used.

(2) background technology: in the prior art, the pencil of the replaceable pencil-lead that school student is used, a plurality of parts such as tensioner cover that fairlead that its structure normally is connected with by written inner chamber and penholder inner chamber are connected with are reinforced by connecting the pencil-lead chucking that will place in the penholder mesopore.It exists not enough: complex structure.Because described a plurality of parts mutual ring set connects in manufacturing and/or assembling process endoporus and cylindrical, the penholder centre bore produces bigger coaxiality deviation relatively, make the pencil-lead outer round surface clamping force inequality that places in the penholder mesopore, the student is very easy when listen to the teacher record or operation are write to fracture pencil-lead, need to adjust immediately or change pencil-lead, waste time, influenced student's learning quality.

(3) summary of the invention: at the deficiency that above-mentioned prior art exists, the pencil that provides a kind of school student to use is provided the purpose of this utility model, and frangibility not when being intended to realize being fastened at pencil-lead in the penholder mesopore and writing is to reach the quality that improves student's study.

For achieving the above object, the technical solution of the utility model is achieved in that the pencil that this school student is used, and comprises penholder and the pencil-lead in the hole of being placed in one; It is to be provided with the penholder front end circular cone cylindrical that tightens groove vertically, locks with the conical bore conical surface engage threads of the written inner chamber of locking accordingly, will place the pencil-lead chucking in the described penholder mesopore to reinforce.

The utility model is by taking the simple structure of the written inner chamber conical surface engage threads locking of above-mentioned penholder front end cylindrical and locking, compare with prior art: reduced quantity and its coaxiality error that in manufacturing and/or assembling process, forms that part connects, will place the stressed chucking equably of pencil-lead outer round surface in the penholder mesopore to reinforce.Realized that effectively student's pencil-lead when listen to the teacher record or operation are write is difficult for being fractureed, and has improved student's learning quality significantly.

(4) description of drawings: Fig. 1 has the front view of part section for the utility model;

Fig. 2 be among Fig. 1 A-A to cutaway view.

(5) specific embodiment: Fig. 1-shown in Figure 2.The pencil that this school student is used comprises penholder and the pencil-lead in the hole of being placed in one; It is to be laid with four penholder front end circular cone cylindricals that tighten groove 3 vertically, the conical bore conical surface with the written inner chamber of locking engages accordingly, the internal thread of locking written inner chamber by the plastics locking that is threaded with the penholder leading section cylindrical that rubber-plastics material constitutes will place pencil-lead 1 in the described penholder mesopore to tighten and reinforce.For ease of revising font, be connected with rubber 2 (Fig. 1-shown in Figure 2) in the rear end of described penholder.During use, usually selecting diameter is the pencil-lead of 2mm, the rotation lock nib is unclamped the internal thread of its inner chamber and the external screw thread of penholder leading section, the circular cone cylindrical of penholder front end is separated with the conical bore conical surface joint of the written inner chamber of locking, on the penholder front end circular cone cylindrical four tighten groove 3 strains and make its expanded in diameter increase at this moment, the pencil-lead 1 that is fastened in the penholder mesopore is unclamped, the student adjusts pencil-lead 1 and stretches the Len req that leans out the written front end of locking, in screwing that locking nib links to each other with penholder, external screw thread, engage with penholder front end circular cone outer conical surface by locking written conical bore, penholder leading section endoporus strain is shunk the stressed chucking equably of pencil-lead 1 outer round surface is reinforced, realized that student's pen core that writes is difficult for fractureing.

The above only is a preferred implementation of the present utility model.Be noted that for the person of ordinary skill of the art; under the prerequisite that does not break away from the principle of the invention; need not other technical characterictic that the process creative work just can be associated; can also make the modification and the improvement of some kinds of basic identical modes; realize essentially identical function and produce essentially identical effect; these variations should be considered as equivalent feature, all belong within the protection domain of the utility model patent.

Claims

1. pencil that school student is used, comprise penholder and the hole that is placed in one in pencil-lead; It is characterized in that: be provided with the penholder front end circular cone cylindrical that tightens groove (3) vertically, lock with the conical bore conical surface engage threads of the written inner chamber of locking accordingly, will place pencil-lead (1) chucking in the described penholder mesopore to reinforce.

2. the pencil that a kind of school student according to claim 1 is used is characterized in that: be connected with rubber (2) in the rear end of described penholder.