CN2323976Y - Propelling pencil with double-writing core points - Google Patents

Abstract

The utility model relates to a double-collet type propelling pencil of an eraser, which can solve the problems that because the eraser is used for rubbing, a core pipe is rotated and clamped pencil leads of two heads of a front and a back heads are twisted to be broken. The double-collet type propelling pencil of an eraser can release bad problems because of the consumption of the eraser in replenishing the pencil leads. The double-collet type propelling pencil of an eraser is provided with a front collet used for maintaining the pencil leads and a back part collet which is used for delivering the pencil leads. The utility model is characterized in that the outer side of the back part of a consecutive core pipe 4 of the back part collet is fixedly provided with a joint pipe 3 which can be made to do axial slide to an axial barrel and can not be rotated and the back part of the joint pipe 3 is provided with eraser maintaining mechanisms 12 and 16 which are composed of supporting main bodies 13 and 17.

Description

Double fastener hair style propelling pencil

The utility model has a trip and is embedded with the rear portion chuck that pen core quantitatively can be sent of chuck bunching ring about a kind of, reach one in order to prevent the double fastener hair style propelling pencil of the anterior chuck that pen core retreats, refer to a kind of double fastener hair style propelling pencil that is provided with erasing rubber mechanism at the rear portion especially.

Past attempts discloses many these type of double fastener hair style propelling pencils, and the main purpose of its structure is in order to reduce the loss of pen core.Yet the known double fastener hair style of this kind propelling pencil is in the occasion with two chuck clamping pen cores, if the chuck of one side is former thereby when rotating because of certain, then just can be twisted and be lost by the pen core of two chuck clampings, in this occasion, the pen core of breakdown then can enter between anterior chuck and the rear portion chuck, and hinder sending of pen core, again after disconnected core, row send core action and when making the pen core at rear promote the place ahead pen core again, because the broken part of the place ahead pen core and the broken part of rear pen core are staggered, pen core can't be sent, be its shortcoming.

When rotating its pressing member or erasing rubber that continues on the chuck of rear portion with the core pipe that be situated between, the writer keeps tool, and when the use erasing rubber, then erasing rubber can be subjected to a power of reversing and be communicated on the core pipe, the rear portion chuck will also be rotated with the core pipe, satisfy and also make the power that the rear portion of the pen core of the front portion of pen core of anterior chuck clamping and rear portion chuck folder clamping twisted and lose.

So, the utility model aims to provide a kind of double fastener hair style propelling pencil with erasing rubber, its chuck can slide vertically, but in order to prevent the rotation of chuck, and respectively between the conjugation tube of beam barrel and the set of core pipe institute, and between conjugation tube and erasing rubber support body, be provided with the spline means, can prevent from then that pen core from twisting to lose.

Even if this kind propelling pencil then can't be guaranteed the space that sufficient erasing rubber is used with regard to its complicated internal structure in the beam barrel rear portion of propelling pencil.So the erasing rubber that very little body can only be set in the material object is in a tool.In order to reduce the core of residual core or meaning loss, this situation keeps with chuck and to send core will be more obvious with the double fastener hair style propelling pencil of chuck having pen core.

In addition, when wiping word with erasing rubber, because of its friction paper can produce the erasing rubber bits, the pen core carbon dust that erasing rubber meeting sorption is wherein adhered to, thereby will make the consumption of rubber very big, do not need how long just can use the light erasing rubber.

And the utility model is considered the complicated structure of complicated double fastener hair style propelling pencil and the characteristic of this kind rubber, the purpose of this utility model is to worry erasing rubber because of the change of shape after using, and can easily erasing rubber mechanism be extracted with the cassette form, again can be according to the abrasion of erasing rubber, and make erasing rubber stretch out suitable length.

Even, the purpose of this utility model is except the shortcoming of textural solution erasing rubber, and during the erasing rubber that the arbitrary material that adopts plastic cement system or rubber system constitutes, also there is not the problem on using, in addition when replenishing pen core, touch dirty black erasing rubber and besmirch finger etc. in order to solve the problem that is difficult for directly extracting the rotten erasing rubber of its abrasion, to reach not cause to point, and can simply the erasing rubber mechanism of blocking be extracted.

Another purpose of the present utility model is to provide a kind of double fastener hair style propelling pencil, when the utility model is applied on the propelling pencil, even erasing rubber has all shapes and size, reach the problem of gapped error on making, but the utility model all can be installed in the rear portion with erasing rubber easily, also can correctly and easily replenish pen core, even when using erasing rubber, also do not have the rotation that makes erasing rubber and be situated between and be conveyed to the rear portion chuck and the related problem that makes rear portion chuck rotation, the problem lost so does not also have that the pen core that makes front and back two chuck clampings is twisted with the core pipe.

Even, usually the diameter of beam barrel and the core pipe person that is the inequality, can produce very big gap therebetween and cause pen core to enter therebetween, or when using erasing rubber, the problem of rocking of core pipe will be caused, but, can solve the above problems easily then because of the utility model is provided with the conjugation tube that tool is isolated function between beam barrel and core pipe.

Another purpose of the present utility model be to provide a kind of have keep pen core with before portion's chuck and send the double fastener hair style propelling pencil of the rear portion chuck that pen core uses, it is characterized in that: the rear outside of the core pipe that is continued at the rear portion chuck is installed with one can be to the capable axial slip of beam barrel but the conjugation tube that can't rotate, multiple be provided with at the rear portion of this conjugation tube one can't be to the conjugation tube rotation load and unload freely rotary erasing rubber delivering mechanism by support body constituted.

Again, another purpose of the present utility model is to provide a kind of double fastener hair style propelling pencil that keeps the anterior chuck that pen core uses and send the rear portion chuck that pen core uses that has, it is characterized in that: the rear outside of the core pipe that is continued at the rear portion chuck is installed with one can be to the capable axial slip of beam barrel but the conjugation tube that can't rotate, multiple be provided with at the rear portion of this conjugation tube one can't be to the conjugation tube rotation load and unload freely erasing rubber maintaining body by support body constituted.

Another purpose of the present utility model is to provide a kind of double fastener hair style propelling pencil that keeps the anterior chuck that pen core uses and send the rear portion chuck that pen core uses that has, it is characterized in that: the rear outside of the core pipe that is continued at the rear portion chuck is installed with a conjugation tube, this conjugation tube can bear the core pipe by anterior large-diameter portion, and the interior perimembranous of the peripheral part of conjugation tube and beam barrel is formed with rotation prevention portion respectively, can be to the capable axial slip of beam barrel but the structure that can't rotate and this conjugation tube is constituted, the multiple erasing rubber bearing that is provided with at the rear portion of this conjugation tube.

Followingly describe it in detail with regard to embodiment of the present utility model with reference to accompanying drawing.

Fig. 1 is the longitudinal section of the 1st embodiment of double fastener hair style propelling pencil of the present utility model.

Fig. 2 is the longitudinal section at the rear portion of Fig. 1 propelling pencil of unloading rotary erasing rubber delivering mechanism.

Fig. 3 is the longitudinal section of the beam barrel of Fig. 1.

Fig. 4 is the front view that the interior side rib that is represented by dotted lines the beam barrel of Fig. 1 is fastened on the state of conjugation tube.

Fig. 5 is the sectional elevation along the A-A line of Fig. 1.

Fig. 6 is the perspective view of wanting portion of the erasing rubber delivering mechanism of Fig. 1.

Fig. 7 is the decomposition diagram of wanting portion of the erasing rubber delivering mechanism of Fig. 6.

Fig. 8 is the longitudinal section of the 2nd embodiment of double fastener hair style propelling pencil of the present utility model.

Fig. 9 is the part longitudinal section of variant embodiment of the erasing rubber bearing sleeve of Fig. 8.

Figure 10 is the part longitudinal section of the variant embodiment of Fig. 8 beam barrel rearward end.

Figure 11 is the part longitudinal section of variant embodiment of the erasing rubber maintaining body of Fig. 8.

Figure 12 is the longitudinal section of the double fastener hair style propelling pencil of the 3rd novel embodiment of this enforcement.

Figure 13 is the sectional elevation of the B-B line of Figure 12.

Figure 14 is the longitudinal section of variant embodiment of the double fastener hair style propelling pencil of Figure 12.

Figure 15 is the longitudinal section of variant embodiment of the double collet formula propelling pencil of Figure 12.

Figure 16 is the sectional elevation of the C-C line of Figure 15.

Figure 17 is the longitudinal section of variant embodiment of the double fastener hair style propelling pencil of Figure 15.

Fig. 1 to Fig. 7 is show the double fastener hair style propelling pencil of first embodiment of the present utility model and part thereof graphic, among the figure, beam barrel 1 leading section has screwed togather a precentrum 2, and beam barrel 1 inside is provided with a core pipe 4 slidably, and the rearward end of core pipe 4 is fixed with a conjugation tube 3 that can have the spline function to beam barrel 1 described later.Be pressed at the leading section of core pipe 4 in addition and be fixed with one in order to send the rear portion chuck 5 of pen core, the leading section trip of this rear portion chuck 5 is embedded with a chuck bunching ring 6.

Moreover, the rear end of this chuck bunching ring 6 is provided with the elasticity cylindrical body 7 of a butt, and between this elasticity cylindrical body 7 and core pipe 4 front ends, be equiped with a Rear springs 8, promptly, this elasticity cylindrical body 7 is the flange part 7a that are formed with inside side at front end, and be elastomeric Rear springs 8 just butt be installed in this flange part 7a inboard, Rear springs 8 can be given core pipe 4 then and be equaled beam barrel 1 inside and have an elastic force that moves backward.

Be fixed with a joint 9 in the outside of elasticity cylindrical body 7 so as to fastener structure again, be equiped with a front springs 8 between multiple path shoulder front end at joint 9 and precentrum 2 inner wall parts, have a mobile backward elastic force and give joint 9 with this anterior spring 8.Even, be pressed at the leading section of the path shoulder of joint 9 and be fixed with one in order to keep the anterior chuck 11 of pen core.

This front portion chuck 11 is configured in the precentrum 2, and anterior chuck 11 is to be formed under the state that advances, and just can make the degree that pen core moves when can prevent degree that pen core falls and being subjected to slightly pressure with pen core and row keeps pen core.In addition forwardly chuck 11 be formed with block projection 11a from the outstanding part of the front end of precentrum 2.

Moreover this front portion chuck 11 has the opposing pen and presses and the confining force of row maintenance pen core under the state that retreats.Again in Fig. 1, symbol 12 be show described later at the rotary erasing rubber delivering mechanism of the set cassette in the rear of core pipe 4.The rear portion system of right core pipe 4 is fixed with conjugation tube 3 as the aforementioned, this conjugation tube 3 as shown in Figure 4 be formed with equally spaced four outer ribs 3a at peripheral part, the front end of these outer ribs 3a is formed with the acute angle part 3aa of the guiding usefulness when engaging with the interior side rib 1a of beam barrel 1 described later again.Because this acute angle part 3aa has the function of guiding when above-mentioned engaging, satisfy when assembling, also have the advantage that need not to consider directionality.

On the other hand, the inboard pars intermedia of conjugation tube 3 is provided with and is the circular protrusion 3b of stop section in order to decision aftermentioned support body 13 positions, be formed with the interior side rib 3c that spline is used again along its length at the rear of circular protrusion 3b, the rear end of side rib 3c is formed with the acute angle part 3cc of guiding usefulness in these, this acute angle part 3cc with the outer ribs 13b engaging of support body 13 when have the function identical with aforesaid acute angle part 3aa.

Again, the front end of conjugation tube 3 and rear inside are formed with the inclined plane part 3d that the easy guiding pen core when the filling pen core enters respectively, and the circular protrusion 3b of its inboard pars intermedia then also is formed with the inclined plane part 3e in the footpath of flaring rearward that can guide pen core equally easily.

Moreover, for the direction of rotation to beam barrel 1 of locking conjugation tube 3, and as shown in Figure 3 in beam barrel 1 perimembranous equally spaced be formed with identical four the interior side rib 1as corresponding (dotted line of Fig. 4 partly is the state that shows that the interior side rib 1a of beam barrel 1 just engages with the outer ribs 3a of conjugation tube) with conjugation tube 3 outer ribs 3a (with reference to Fig. 4).In the interior side rib of the beam barrel 1 of this occasion obviously as shown in Figure 3 the stroke of pushing for considering propelling pencil be formed with sufficient length along its length.

Even, also form outer ribs 13b (with reference to Fig. 6,7) at the 13a of foot of the support body 13 of erasing rubber delivering mechanism 12, in order to do making it be fastened on the interior side rib 3c (with reference to Fig. 2) that rearward forms from circular protrusion 3b of conjugation tube 3.Other is formed with inclined plane part 13c at the front end lateral surface of the 13a of foot of support body 13, and this inclined plane part 13c forms the inclined-plane 3e that tilts to the back lower place corresponding to the vertical section of this circular protrusion 3b.Again, the internal diameter of the circular protrusion 3b of the internal diameter of support body 13 and conjugation tube 3 and the internal diameter of core pipe 4 all are the diameter that forms much at one, and pen core can be passed through smoothly.

The portion that wants of this erasing rubber delivering mechanism 12 then describes it in detail according to Fig. 6 and Fig. 7.Side face system is formed with the spiral goove 14b as the spiral means within the set guide 14c (asking for an interview Fig. 1) of support body 13, the 13a of foot of support body 13 is formed with equally spaced four the outer ribs 13b in order to spline again, and be provided with the acute angle part 13bb that guides usefulness at the front end of this outer ribs 13b, be formed with a pair of relative longitudinal trough 13d again at the rear of this outer ribs 13b, and keep the engaging protrusion 15a of the erasing rubber cushion cap 15 of erasing rubber slidably to embed freely in this groove 13d.

The outside of support body 13 is formed with the protrusion tab 13e that Jie establishes with grooving, and can be limited to the flange 14a place of guide 14.Moreover, the 13a of foot that makes support body 13 can move axially freely but locking and the locking means that can't rotate are by four interior side rib 3c (asking for an interview Fig. 2) that uniformly-spaced are formed on conjugation tube 3 rear portion inner faces, and the outer ribs 13b outside the 13a of foot that is formed on support body 13 that engages with these inboard rib 3c constitutes.

Below with regard to the action specification of the propelling pencil of first embodiment of the present utility model it.At first, when writing and when pushing the pressing cover 3 of its rear end, because a little less than front springs 10 than Rear springs 8 was, front springs 10 was compressed earlier then, so anterior chuck 11 is to open while advancing, be the state that enters that to accept from the pen core at rear then.

Subsequently, the inclination shoulder of joint 9 is connected to the precentrum 2 inboard shoulders that form, and then, Rear springs 8 is to be compressed, and rear portion chuck 5 is advanced with core pipe 4.When rear portion chuck 5 advanced, chuck bunching ring 6 was connected to the inboard formed shoulder of joint 9, and rear portion chuck 5 is that row is open, and pen core advances by means of deadweight then and kept by chuck.Thereafter, when releasing was pushed, then chuck 5 involutions in rear portion were to primary position.When further pushing again,, enter in the joint 9 and send pen core while rear portion chuck 5 keeps the state of pen core to advance.

Even pen core enters in the anterior chuck 11, and while being kept stretching out from front end by chuck 11.Again, pen core is in writing and the occasion of abrasion, as long as the pressing cover 3 of pushing this rear end once again is sending of feasible pen core just, when the length of pen core shortens, can be by heavily covering identical push action, and the new pen core in the core pipe 4 is sent, and with new pen core the pen core in the place ahead abrasion is released, then can continue for the usefulness of writing.

When pen core stretches out when long from anterior chuck 11, can push rear end pressing cover 3, and make after chuck expands out a little, can push the pen core front end and make the inside side's retraction of pen core, can adjust the extension elongation of pen core then and prevent that pen core from losing.

Moreover, when desiring to wipe the word of wrongly writing, hand-holdable beam barrel 1 and rotate this guide 14, at this moment, owing to be to borrow outer ribs 13b and the mutual structure that engages of interior side rib 3c and can't rotate relatively between the support body 13 of erasing rubber delivering mechanism 12 and the conjugation tube 3, erasing rubber cushion cap 15 is guided by the spiral goove 14b of guide 14 then, Yi Bian and the longitudinal trough 13c that is supported body 13 limits and row rises moves, and cause erasing rubber to be stretched out.

When using erasing rubber, to there be suitable revolving force to be applied on the erasing rubber, but because of reaching between conjugation tube 3 and the support body 13 between conjugation tube 13 and the beam barrel 1 all is to rotate event, the revolving force system that puts on the erasing rubber is communicated to the rear portion chuck 5 that core pipe 4 continues, and can not sprain the pen core of anterior chuck 11 and chuck 11 clampings.Multiple conjugation tube 3 therefore the time has the function as separator, satisfies the loosening and problem that is difficult for wiping word of centreless pipe 4.Even, with finishing and desire when taking in erasing rubber in the guide 14, as long as just make these guide 14 reverse rotations erasing rubber of withdrawing.

Inferior new pen core to the situation in the core pipe 4 of just replenishing illustrates it.In this occasion, the conjugation tube 3 that can be set firmly from core pipe 4 rear portions is pulled up the 13a of foot of support body 13, at this moment, constitute the so-called cassette structure of blocking because of erasing rubber delivering mechanism 12, and the 13a of foot of conjugation tube 3 and support body 13 system is with the lock structure between the lengthwise flank, need not touch erasing rubber then and catches guide 14 easily and extract.Then, by guide ramp 3d, the 3e of conjugation tube 3, be pen core can be situated between to be packed into smoothly in the core pipe 4 from beam barrel 1 open rearward end with conjugation tube 3.

Fig. 8 is the vertical portion view of the double fastener hair style propelling pencil of second embodiment of the present utility model.The structure of the double collet that it is anterior is to be same as first embodiment fully and to omit its explanation, and this example is the rotary erasing rubber delivering mechanism 12 that replaces beam barrel 1 rear portion of first embodiment with erasing rubber maintaining body 16.

Below just with regard to these erasing rubber maintaining body 16 explanations.This mechanism 16 be by: one is provided with the tubular support body 17 of the 17a of foot of the outer ribs identical with the outer ribs 13b of first embodiment, and an erasing rubber bearing sleeve of being located in support body 17 tops 18 that the end is arranged constitutes.Again, be installed in erasing rubber on the erasing rubber bearing sleeve 18, between beam barrel 1 and support body 17, be provided with a pressing cover 19 removably then in order to hide it.

Moreover, be that the feasible rear end that is same as first embodiment is pushed and sent pen core for the usefulness of writing by the Automatic pen of this second embodiment.Pull up pressing cover 19 and then can use erasing rubber, but when erasing rubber shortens because of abrasion, then can with erasing rubber together with its bearing sleeve 18 simultaneously self-supporting body 17 extract, the groove 18a of bearing sleeve 18 is slightly expanded out to be extracted erasing rubber out to foreign side, pine is behind finger subsequently, bearing sleeve 18 is just borrowed groove 18a and is restored, and row clamps this erasing rubber again.

Be with, this bearing sleeve is installed on the support body 17, constitute erasing rubber maintaining body 16 integrated and be assembled on the propelling pencil also for feasible.Again, when replenishing standby core,, and the upper end of erasing rubber maintaining body 16 is taken,, pulled up easily in the mode of cassette structure just can need not touch erasing rubber and need not pull up under the state of erasing rubber as long as pull up pressing cover 19.

Fig. 8 and Fig. 9 are the part longitudinal sections of the variation of erasing rubber bearing sleeve.Bearing sleeve 18 in this occasion is that the cross section that forms the no end is the C font.When using this bearing sleeve 18, with the erasing rubber of the rotation delivering mechanism of Fig. 1 etc. in comparison, then not only the part number is less and can use thicker erasing rubber for this example, again with the erasing rubber bearing sleeve that the end is arranged of Fig. 8 in comparison, then this example more has and makes erasing rubber stretch out longer advantage, promptly, because bearing sleeve 18 is no end persons, bearing sleeve 18 can be limited to the upper end of support body 17, and erasing rubber then can insert the deep of support body 17, therefore, when erasing rubber consumes, as long as bearing sleeve 18 is extracted simultaneously together with erasing rubber, expand again and open its slotted eye 18 ' a and erasing rubber is pulled out necessary length, it is reinstalled on the support body 17 just can subsequently.

Figure 10 be diagrammatic sketch 8 beam barrel 1 variation want portion's longitudinal section, the rearward end of its beam barrel 1 is formed with a pair of grooving 1b, can easilier pull up erasing rubber maintaining body 16.By this formation, when core pipe 4 is replenished pen cores, can make that finger is easier deeply to grasp support body 17, and the easier advantage that erasing rubber maintaining body 16 is extracted is arranged.

Even, when desire pressing cover 19 is pulled up, for fear of improper from conjugation tube 3 pull-off support bodies 17 of pulling up before the pressing cover 19, and be necessary to make the inlay resultant force of 17 of this pressing cover 19 and support bodies to be less than the inlay resultant force of 17 of aforementioned conjugation tube 3 and support bodies.In specific words, the chimeric intensity that pressing cover 19 and support body are 17 is 100g～400g, and the chimeric intensity of 17 of conjugation tube 3 and support bodies is 800g～1000g and preferable.Even making the chimeric intensity of 4 of conjugation tube 3 and core pipes is that 2000g is above, then can not cause and the counter-rotating of 17 of pressing cover 19 or support bodies chimeric, and self-evident.

Figure 11 is the part longitudinal section of variation of the erasing rubber maintaining body 16 of diagrammatic sketch 8.This example differs from aforementioned each embodiment in the set installation site of adorning the pressing cover 19 that takes off, support body 17 tops that constitutes erasing rubber maintaining body 16.That is, this example is that following ora terminalis with pressing cover 19 carries and is loaded on this on the side bead 17a of the outstanding support body 17 of beam barrel 1.Again, Fig. 8,9 and 11 also can be formed with as shown in figure 10 breach and self-evident.By this structure, when replenishing core, can pull up its pressing cover 19, take it from the support body 17 that beam barrel 1 is given prominence to finger again, just can easily erasing rubber maintaining body 16 be extracted from beam barrel 1.In this occasion, extract easily because of the bead 17a position that finger can grabbed on the support body 17, also be its advantage.Even, shown in the various embodiments described above as support body 13,17 and conjugation tube 3 between and the spline of 1 of conjugation tube 3 and beam barrel construct, be to be separately four outer ribs and the lock structure of interior intercostal, but the quantity of rib is not defined as four above-mentioned flanks, moreover, the spline structure also is not defined as above-mentioned structure, for example also can constitute the structure that the cross section is the mutual engaging of polygonal portion.

Figure 12 is the longitudinal section that shows the double fastener hair style propelling pencil of the utility model the 3rd embodiment.The front portion of the propelling pencil that this is routine is to be same as shown in Figure 1ly, and only this example is that the front portion with conjugation tube 3 is large-diameter portion 3x, and the rearward end of core pipe 4 is pressed in this large-diameter portion 3x, in addition erasing rubber bearing 20 is pressed in the rearward end that is fixed in this conjugation tube 3.Moreover the inboard inclined plane part 3xx that forms of the front end in the large-diameter portion 3x of conjugation tube 3 as shown just can be pressed into core pipe 4 easily.

Moreover perimembranous is formed with negative thread 1x in the rear end of beam barrel 1, and the pin thread 21x of tail hat 21 is screwed together in this negative thread 1x place, and pen clip 23 is installed on the beam barrel 1 with installation portion 23a with being the clamping shape.Again the erasing rubber that can load and unload attached bearing sleeve 18 freely is installed in above-mentioned erasing rubber bearing 20, the pressing cover 19 that can hide this erasing rubber then can load and unload and be installed in freely on the erasing rubber bearing 20.

Secondly, Figure 13 shows that the periphery of the large-diameter portion 3x of conjugation tube 3 is formed with the engaging rib 3y of three lengthwises, then be formed with in addition the guide channel 1yy of six lengthwises, and constitute rotation prevention portion with engaging between engaging rib 3y and guide channel 1yy at the heavy section 1y in interior week of the beam barrel 1 of engaging rib 3y correspondence.Again, for make with the beam barrel 1 of guide channel 1yy bottom and heavy section 1y adjacency interior week (dotted line those shown among the figure) do not have shoulder, and should make its distance be all equal apart from the axle center.Moreover, for the large-diameter portion 3x that reaches conjugation tube 3 in beam barrel 1 slidably freely but the function that can not rotate, only form the amount of guide channel 1yy with perimembranous within beam barrel 1, the interior circumferential axis direction of this beam barrel 1 partly increased and be heavy section.

Because the rotation prevention portion that conjugation tube 3 and beam barrel are 1 constitutes as above-mentioned person, make then conjugation tube 3 form can to beam barrel 1 go endwisely slip but in direction of rotation by the state of locking.The result makes the erasing rubber bearing 20 etc. of conjugation tube 3 and rear member also constitute and can not rotate, and satisfies 4 rotations of centreless pipe and makes the pen core of anterior chuck 11 (with reference to Fig. 1) and rear portion chuck 8 (with reference to Fig. 1) clamping be subjected to the worry that twisting is lost.

Because Figure 13 is the directionality of the connector 3 when considering assembling, satisfies the guide channel 1y of beam barrel 1 is formed six with the multiple of engaging rib 3y, thereby have the advantage that assembling is easier to and produce the good goods of shrinking deformation when being unlikely beam barrel 1 moulding.Again, symbol 1z shows the cyclic rib for preventing to become flexible that is formed on perimembranous in the beam barrel 1 among the figure.Press the propelling pencil of present embodiment, as long as just take out its pressing cover 19 and erasing rubber bearing 20 can be replenished new pen core easily.

Figure 14 is the variant embodiment of diagrammatic sketch 12, this routine pressing cover 10 differs from person shown in Figure 12, promptly, its peripheral part that is positioned at tail hat 21 perimembranous that is installed in the removably pressing cover 19 on the erasing rubber bearing 20 is formed with the prominent bar 19a of parallel ring-type, is nested with one " O " ring between the prominent bar 19a of these two ring-types.The prominent bar 19a of " O " ring and ring-type constitutes and can not produce loosening situation whereby, makes pressing operation very slick and sly then.

Figure 15 then is another variant embodiment of Figure 12, be the embodiment when being preced with 21 usefulness molding synthetic resins or die cast with tail, can not produce shrinking deformation during for the perisporium moulding in interior week of making tail hat 21, and form as shown in figure 16, promptly, in Figure 16, the inner peripheral surface of tail hat 21 is formed with eight roads along its length and escapes ditch 21a in order to what prevent shrinking deformation.

Figure 17 is the variant embodiment of Figure 15, when this example is pressed at core pipe 4, can avoid the bad situation of sliding action of 3 pairs of beam barrels 1 of conjugation tube.It differs from Figure 15 person and is partly to be partly to be located at different positions with the guide channel 1y of beam barrel 1 along its length with the engaging for rotation prevention portion that engages between rib 3y of the peripheral part of conjugation tube 3 with conjugation tube 3 with chimeric the expanding of core pipe semi-finals power.Person very, the interior perimembranous corresponding with rotation prevention portion at conjugation tube 3 is formed with inclined plane part 3xx along its length.

Promptly, large-diameter portion 3x lengthening with conjugation tube 3 front portions, and the rear portion of core pipe 4 deeper is pressed into result in the conjugation tube 3, powerful chimeric expanding partly along the distant off normal rearward of engaging part between rib 3y of engaging of length direction from the peripheral part of the guide channel 1yy of beam barrel 1 and conjugation tube 3.And conjugation tube 3 produces the gap along its length and between the core pipe 4 by the inclined plane part 3xx of the interior perimembranous corresponding with rotation prevention portion.

So, the minor diameter part 3z of conjugation tube 3 is chimeric and some to foreign side's deflection by brute force, even diameter increases, this partly also once left sliding part (rotation prevention portion) and and form between the core pipe 4 gap so, satisfy when core pipe 4 is pressed into, this partly can butt core pipe 4 because being provided with inclined plane part 3xx peripheral part, so can not make conjugation tube 3 produce the situation of expansions.Therefore, the sliding action along its length of 3 pairs of beam barrels 1 of conjugation tube can't be started and causes harmful effect, and in core pipe 4 is pressed into conjugation tube 3 time, and core pipe 4 can be imported in the conjugation tube 3 etc. sleekly, is all its advantage.

The utility model by above-mentioned formation is to have eight kinds of following effects:

1. erasing rubber delivering mechanism or maintaining body are to constitute blocking or cassetteization, and when using erasing rubber, even if firmly being pushed paper, wipes when the word by erasing rubber, also can not make the erasing rubber rotation, even the rear portion chuck generation rotation that the core pipe is continued, can prevent that then the twisting of pen core from losing.

2. erasing rubber belongs to elastomer, when replenishing pen core, erasing rubber system often becomes fragility because of deterioration or shortens because of use consumes, variation for shape of these erasing rubbers etc., there is no for fear of pulling out easily of erasing rubber and unload, can touch under the situation that is subjected to the erasing rubber that the pen core break flour pollutes not showing finger again, with erasing rubber mechanism sleekly one extract.

3. erasing rubber can be given prominence to event according to the consumption degree, makes the waste of residual erasing rubber reduce to minimum then.

4. owing to be provided with the conjugation tube that has the spline function concurrently and isolate function between beam barrel and the core pipe, when using erasing rubber, excessive power puts on erasing rubber can not make the core pipe produce loosening situation yet, and pen core does not also have the problem that is strayed between beam barrel and the core pipe.

5. because of erasing rubber is not to be directly installed on the conjugation tube, and be provided with in week within it, not have the jammed problem of pen core in order to prevent that the shoulder (being the part of internal diameter inequality) that support erasing rubber that erasing rubber sinks to is used from satisfying when replenishing pen core.

6. even, among arbitrary embodiment of the present utility model, because of the no-float of conjugation tube and erasing rubber support body so, erasing rubber mechanism can adopt rotation delivering mechanism (with reference to Fig. 1) or simple erasing rubber maintaining body (with reference to Fig. 8) and be applicable on the propelling pencil body and excellent.

Moreover, engage between all guide channel in the engaging rib of the anterior periphery of conjugation tube and the beam barrel and form the spline means, can reach the spline function with open-and-shut structure then.

8. because powerful chimeric the expanding between the spline that conjugation tube engages with beam barrel part and conjugation tube and core pipe partly is partly to stagger from sliding in the position of length direction, can prevent the bad situation of the sliding action to beam barrel of conjugation tube then.

Among the figure: 1 ... beam barrel, 2 ... precentrum, 3 ... conjugation tube, 4 ... the core pipe, 5 ... the rear portion chuck, 6 ... the chuck bunching ring, 7 ... the cartridge-like body, 8 ... Rear springs, 9 ... joint, 10 ... front springs, 11 ... anterior chuck, 12 ... rotary erasing rubber delivering mechanism, 13 ... support body, 14 ... guide, 15 ... the erasing rubber bearing, 16 ... the erasing rubber maintaining body, 17 ... support body, 18 ... the erasing rubber bearing sleeve, 19 ... push cup, 20 ... the erasing rubber bearing, 21 ... the tail hat, 22 ... the O ring.

Claims (11)

1. double fastener hair style propelling pencil, have and keep the anterior chuck that pen core uses and send the rear portion chuck that pen core is used, it is characterized in that: the core pipe rear outside that is connected the rear portion chuck is installed with one can be to the capable conjugation tube in axial sliding of beam barrel, the rear end that this conjugation tube borrows its preceding Kong Yicheng to receive the core pipe, and be provided with mutual rotation preventive mechanism in the interior perimembranous of its peripheral part and beam barrel, be provided with the erasing rubber maintaining body that the rotation of pair of engaging pipe is locked in the rear orifice of conjugation tube.

2. double fastener hair style propelling pencil as claimed in claim 1, it is characterized in that, this erasing rubber maintaining body by: one is provided with the guide of spiral means in the inboard, one be subjected to this spiral means guiding of this guide and move in order to keeping the erasing rubber bearing of erasing rubber, and one be provided with axial slots and constitute in order to the support body of the engaging protrusion of this erasing rubber bearing of restriction guiding; And the inboard of the foot of this support body and conjugation tube is provided with the rotation preventive mechanism of connection mutually, makes the support body can be to engaging tubular axis to the plug loading and unloading freely but can't rotate whereby.

3. double fastener hair style propelling pencil as claimed in claim 1 is characterized in that, this erasing rubber maintaining body is provided with the erasing rubber bearing sleeve that can make erasing rubber outstanding according to the consumption of erasing rubber.

4. double fastener hair style propelling pencil as claimed in claim 1 is characterized in that, this conjugation tube is formed with the stop section that the decision position is used at inwall, and the vertical section of this stop section forms the inclined-plane that descends backward.

5. double fastener hair style propelling pencil as claimed in claim 1 is characterized in that, the peripheral part of the interior perimembranous of this conjugation tube and the foot of support body is formed with the engaging rib of a plurality of lengthwises respectively.

6. double fastener hair style propelling pencil as claimed in claim 1 is characterized in that, the front and back end of this conjugation tube and the foot of this support body are formed with inclined plane part respectively.

7. double fastener hair style propelling pencil as claimed in claim 1 is characterized in that, the rear end of this beam barrel is formed with the slotted eye that is easy to take out for the erasing rubber maintaining body.

8. double fastener hair style propelling pencil as claimed in claim 1, it is characterized in that, this erasing rubber maintaining body is provided with removably pressing cover in addition at the rear portion of support body, and constitutes the inlay resultant force make between this pressing cover and support body less than the inlay resultant force between this conjugation tube and support body.

9. double fastener hair style propelling pencil as claimed in claim 1, it is characterized in that, the top of the support body of this formation erasing rubber maintaining body is provided with removably pressing cover, and makes under this pressing cover the ora terminalis mounting on the side bead on the support body that stretches out from beam barrel.

10. double fastener hair style propelling pencil as claimed in claim 1 is characterized in that, this rotation prevention portion is by the engaging rib of the large-diameter portion periphery that is located at conjugation tube, and the guide channel corresponding with this engaging rib that is located at the heavy section in week in the beam barrel constitutes.

11. double fastener hair style propelling pencil as claimed in claim 1, it is characterized in that, this core pipe inserts rearward end in conjugation tube and is located at and this rotation prevention portion position of inequality along its length, and rearward is formed with inclined plane part from the front end of the large-diameter portion of conjugation tube front portion, and and be provided with the gap between the core pipe.

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