CN1038993C - Mechanical pencil - Google Patents

Abstract

The present invention relates to a propelling pencil provided with a sliding member, especially a propelling pencil a core outlet tube of which can be definitely fixed and actually released during writing, which is composed of a core tube capable of freely sliding, a press tube, a gripping head for conveying a core, a fastening ring, a sleeve barrel, a core outlet tube capable of axially moving and a sliding member, wherein the core tube capable of freely sliding is arranged in a pencil tube, the press tube is arranged at the back end of the core tube, the gripping head for conveying a core is pressed in and fixed at the front end of the core tube, the fastening ring can be inlaid at the periphery of the gripping head, the sleeve barrel is arranged between the inner part of the tube and the gripping head and makes the core tube bear retreat elastic force via an elastic body, the core outlet tube capable of axially moving is inserted in a front conical body at the front end of the pencil tube, and the sliding member is fixed at the core outlet tube. The present invention is characterized in that the front part of the pencil tube is provided with a connecting piece, the front conical body is installed on the pencil tube via the joint construction at the outer side of the front part of the connecting piece, a releasing mechanism capable of axially freely moving is arranged at the inner side of the front part of the connecting piece, and a mesh blocking structure provided with a through hole, which is opened and closed via the releasing mechanism and freely blocks and stops the sliding member, is arranged at the inner side of the front part of the connecting piece.

Description

Propelling pencil

The present invention system is about a kind of saddle that will be fixed with a front end knockout pipe, utilize its with a cone inwall between rubbing action, and the propelling pencil of row maintenance pen core.

Traditional this type of propelling pencil that is provided with saddle, just like the Japanese patent gazette of applicant's application real open flat 5-12184 number disclosed like that, Fig. 7 promptly shows this type of propelling pencil of a tradition, this tool lie in the shaft of a writing brush 21 inside that a front end screwed togather precentrum 22 be provided with one can before and after slide freely core pipe 23, end then is pressed into and is fixed with a chuck 24 before the core pipe 23, these chuck 24 foreign sides are nested with a chuck bunching ring 24a, and are plugged with a chuck tighten spring 25 between the ring-type shoulder of the shaft of a writing brush 23 front ends and the shaft of a writing brush 21.

Be provided with a sliding part 27 that can endwisely slip freely in 22 inner Jie of inner cone with a stationary magazine creel 26 again, and end is installed knockout pipe 28 before saddle 27.

The traditional propelling pencil of this kind only, when its knockout pipe from the outstanding state of precentrum down and when writing, the saddle of its installing knockout pipe is also failed fully fixing, promptly, under the state that the knockout rostrum goes out, saddle is the only frictional force between itself and precentrum inwall of mat and the state that is maintained fixed, and therefore when pen core was subjected to pressure (reservoir tip is pushed the strength of paper) of brute force, the knockout pipe promptly backed away along with the abrasion of pen core.

The present invention's purpose is to make this kind to be provided with the propelling pencil of saddle, when when writing, can fix the saddle that it is provided with the knockout pipe really, and this fixation is removed really.

For achieving the above object, a kind of propelling pencil of the present invention, be by: one is located at the interior slip of shaft of a writing brush core pipe freely; One be located at this core pipe rear end by pressure cylinder; One be pressed into be fixed in core pipe front end send the core chuck; One can be nested in the bunching ring of chuck peripheral part, and one is located at and can gives the sleeve that the core pipe has the elastic force of retreating by elastomer between shaft of a writing brush inside and chuck; One is inserted in the knockout pipe that can move axially in the shaft of a writing brush precentrum; And its inner face that is fixed in this knockout pipe rear end can keep the saddle of pen core to constitute by certain frictional force;

It is characterized in that: portion is provided with a connection piece before the above-mentioned shaft of a writing brush, portion's outside connection was constructed and this precentrum is loaded on the shaft of a writing brush before Jie was thus connected part, multiple before connecting the portion inboard be provided with an arming mechanism that can move axially freely, and one be provided with this arming mechanism of mat of perforation and open and close this saddle card can be ended freely block structure.

When the user by the rear end pressing operation, when advancing so that chuck Jie tightens the elastic force of spring with core Guan Kangzhu, in it advanced process, the bunching ring that is nested in the folder peripheral part can be connected to square teat within the connector and break away from chuck, subsequently, be advanced further and butt is separated decylization when chuck

Within during the face shoulder, then force and separate decylization and advance thereupon, and make this separate decylization with stop ring before the oblique minor diameter part of inside square neck of tapered portion compeled out and advanced, so, advance along with before the saddle, the also related knockout pipe of its one that makes is outstanding from the precentrum front end.When removing this pressing operation, chuck and core Guan Naihang retreat, but in the process that this retreats, can block thereby stop ring will return original state after the on-slip part shoulder can make saddle together with knockout guarantee hold fixing.Moreover, when desiring to make knockout pipe retraction precentrum inner, can go the operation that the rear end pushes again, open stop ring with expansion, and being pushed paper, knockout pipe summary one gets final product retraction.

Below according to description of drawings the present invention's embodiment,

Fig. 1 is the longitudinal section of stationary state for the knockout pipe of one of propelling pencil of the present invention embodiment;

Fig. 2 wants portion cutaway view from stationary state to what stationary state was not divided a word with a hyphen at the end of a line process for the knockout pipe of Fig. 1;

Fig. 3 wants portion's cutaway view for the knockout Guan Ziwei stationary state of Fig. 1 to what stationary state was divided a word with a hyphen at the end of a line process;

Fig. 4 is the front view of the stop ring among Fig. 1;

Fig. 5 is the cutaway view along the A-A line of the stop ring of Fig. 4;

Fig. 6 is the cutaway view of the knockout Guan Chengwei stationary state of another embodiment of propelling pencil of the present invention;

Fig. 7 wants portion's cutaway view for traditional propelling pencil of using traditional saddle.

Fig. 1-3 show the present invention embodiment propelling pencil want portion's cutaway view.Among the figure, the shaft of a writing brush 1 inside is provided with a rear end the core pipe 3 that can move axially that contains pencil-lead by pressure cylinder 2 and inside, and portion is pressed into to be fixed with one and can to embed the interior chuck 5 of a bunching ring 4 before this core pipe 3.End 5a is the lamellar body that is divided into three equal parts usually before this chuck 5, and when chuck 5 broke away from bunching rings 3, three sheet systems of chuck 5 front portions can be elastic dilatation, and free the clamping to pen core.

Again, chuck 5 is to tighten spring 7 by being located at sleeve 6 interior chucks, and is endowed the strength that a body elasticity retreats together with core pipe 3.Between the jut 1a of the annular radial in sleeve 6 rear ends and the shaft of a writing brush 1, be inserted with one again in order to absorb the buffer spring 8 of writing pressure.End is that butt is limited to the 10a of square shoulder portion within a connection piece 10 before the sleeve 6, connector 10 then is that the mat front and back screw togather means and connect the precentrum 9 and the shaft of a writing brush 1 respectively, and what be equiped with a butt inner hole surface in the section endoporus portion before connector 10 separates decylization 11, and this frees ring system and can engage and be inserted in freely in a stop ring 12 inside.

In detail, this stop ring 12 is by being constituted as Fig. 4 and tubular body 12a one of shown in Figure 5 and an anterior tapered portion 12b, stop ring 12 offers an axial slots 12c again, be formed with one again in stop ring 12 inside and can supply the through hole 12d of chuck 5 slips, and through hole 12d is that the footpath is from the inside square expansion gradually of this slotted eye 12c within forming as shown.

Moreover these precentrum 9 inside are provided with a saddle 15 that can move axially freely, and saddle 15 lies in the front portion and is provided with in order to the knockout pipe 13 that keeps the guiding pen core and is provided with a packing in rear inner part.And saddle 15 is to keep pen core with the certain frictional force of side face mat within the packing, and all shoulders can be freely chimeric with stop ring 12 outside the saddle 15.

Secondly with regard to the action specification of the propelling pencil of present embodiment it.At first, when the user pushed it by pressure cylinder 2, chimeric and clamping under the state of pen core with chuck 5 at bunching ring 4, chuck 5 and bunching ring 4 were to be situated between that one is released forward with core pipe 3, end system holds after being connected to saddle 15 before the chuck 5 of this moment, then also forces saddle 15 to advance.In the process that this advances, when bunching ring 4 be connected to the shoulder 8a of connector 10 inboards the time, chuck 5 is to break away from bunching ring 4 and advance alone, chuck is satisfied and is discharged pen core thereupon expanding.When before chuck 5 is further with saddle 15, pushing away, then simultaneously also butt separate decylization 11, and also will separate decylization 11 and release forward.Be with, separate decylization 11 and be within the tapered portion 12b of path of butt stop ring 12 hole wall and give and compeling out, and make saddle 15 can advance to precentrum 9 front inner wall always and end.

At this moment, saddle 15 end afterwards is just to be positioned at stop ring 12 face before, and when releasing was pushed, the chuck 5 that is pushed out was that mat is tightened the strength of spring 7 and made bunching ring 4 be retracted into the event in original position, and stop ring 12 is satisfied contraction recovery again.Therefore, saddle 15 is under the outstanding state in knockout pipe 13, and chuck 5 and bunching ring 4 are to get back to original position, pen core then be stretch out and be completely fixed can be for the state of writing.

Finish and desire when being recovered to knockout pipe 13 in the precentrum 9 when writing, can go again by this pressure cylinder 2, and when making knockout pipe 13 be recovered in the precentrum 9 on one side, can go the push action of pressing pressure cylinder again, so, move back along with after the chuck 5, separate decylization 11 also row retreat, thereby stop ring 12 is radially shrink to restore, in the knockout pipe 13 of this moment promptly is accommodated in.

Moreover, directly do not press off stop ring 12 with chuck 5, and to separate the formation that decylization 11 is pressed off, it is the reason that its uniqueness is arranged, that is, chuck 5 be by and 4 of bunching rings freely chimeric, and can go the pinching of pen core according to need, and when chimeric being disengaged of 4 pairs of chucks 5 of bunching ring, chuck 5 is to be pre-formed to can be towards radially foreign side's expansion.Be with, when making stop ring 12 row as above-mentioned switchings for a long time, will damage the function that expands outwardly of chuck 5 with the chuck 5 that this kind function is arranged, the result does not drop down onto in the packing 14 owing to pen core, and can't send core or send core irregular, or pen core is outstanding unusually and lose etc.Be to be to be provided with one especially to separate decylization 11 and the switching of row stop ring 12 with, the present invention.

Even, above-mentionedly separate the inclined plane part 11a system of end inboard before the decylization 11 and form and hold the inboard to be a little before with the tapered portion 12a of stop ring 12 or contacting then of line can make stop ring 12 go easy switching to separate decylization 11.

Fig. 6 illustrates the cutaway view of another embodiment of propelling pencil of the present invention, the part number of the last example of present embodiment slightly increases, but can make returning more really as shown in the figure of arming mechanism, this example is in setting up a block tube 17 as the block structure between tube 16 and the precentrum 9 as freeing of arming mechanism, multiple be provided with a resetting spring 18 with freeing between the tube 16, free tins 16 and have the elastic force that retreats and give in block tube 17.When removing pressing operation, guarantee to free tube 16 and return, also make the certain switching of block tube 17 row then.Moreover portion is formed with the slightly inwardly oblique rake 17a of square neck before this block 17, and this rake 17a is formed with complex trace axial slots 17b again.

Below with regard to the action specification of the propelling pencil of present embodiment it.When being pressed, promptly force core pipe 3 to tighten the elastic force of spring 7 and resetting spring 18 together with the anti-work of chuck 5 and advance by pressure cylinder.Yet tightening spring 7 resetting springs 18 is to form person as shown, that is, tighten spring 7 and be formation than resetting spring 18 for thin elastic force than weak person, make resetting spring 18 along with before core pipe 3 grades and then be compressed earlier then.And end system holds after being connected to saddle 15 before the chuck 5.

When chuck 5 further advances, the bunching ring 4 that is embedded on the chuck 5 is to be connected to the shoulder 16a that frees tube 16 inboards, then make chuck 5 break away from bunching rings 4 and move on, before this, owing to tighten spring 7 by the fully event of compression, be to make resetting spring 18 be situated between and free tube 16 and be compressed with sleeve 6, and free tube 16 also row advance.Then, when being advanced further, just press off this block tube 17 when freeing tube 16 to hold butt block tube 17 inboards before.And saddle 15 is pushed by chuck 5 and by block tube 17 and reach in forward most position, knockout pipe 13 is protruded in outside the precentrum.At this moment, the shoulder 15a of saddle 15 system holds before just being positioned at block tube 17.

Even, when removing this pressing operation, be that mat resetting spring 18 retreats because of freeing tube 16, be make block tube 17 again row shrink, and the shoulder 15 of saddle 15 is that face only blocks before the block tube 17, and knockout bobbin 13 is fixed.Otherwise, desire occasion that knockout pipe 13 is retreated, but then mat pressing operation once again expands and opens block tube 17, and it is fixing to remove saddle 15, satisfy under this state, knockout pipe 13 can be pushed paper etc., and slowly remove push action and can make knockout pipe 13 retreat retraction easily.

Press the propelling pencil of the use saddle of the invention described above, fixing really when knockout Guan Yu is write, also can remove really.

Claims (5)

1. propelling pencil comprises: one is located in the shaft of a writing brush slidably core pipe; One be located at this core pipe rear end by pressure cylinder; One be pressed into be fixed in core pipe front end send the core chuck; One can be nested in the bunching ring of chuck peripheral part; One is located at and can gives the sleeve that the core pipe has the elastic force of retreating by elastomer between shaft of a writing brush inside and chuck; One be inserted in the precentrum of shaft of a writing brush front end can axially movable knockout pipe; And its inner face that is fixed in knockout pipe rear end can keep the saddle of pen core by frictional force;

It is characterized in that: the front portion of the above-mentioned shaft of a writing brush is provided with a connection piece, the connection structure that above-mentioned precentrum is thus connected portion's periphery before the part is linked on the shaft of a writing brush, in addition before connector square inside be provided with one can axially movable arming mechanism, but and central authorities have through hole and the capable folding of this arming mechanism of mat and block structure that above-mentioned saddle card is ended.

2. by the described propelling pencil of claim 1, it is characterized in that above-mentioned block structure offers the slotted eye of this through hole of connection.

3. by the described propelling pencil of claim 1, it is characterized in that the interior described without leave slotted eye radius vector of the through hole of above-mentioned block structure inwardly enlarges the side gradually.

4. by the described propelling pencil of claim 1, it is characterized in that above-mentioned arming mechanism is a ring, be a little between the rake of the inclined plane part in the end outside and the front end tapered portion inboard of this stop ring before this ring or line contacts.

5. by the described propelling pencil of claim 1, it is characterized in that being provided with a resetting spring of arming mechanism being pushed to the rear between this block structure and the arming mechanism.

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