CN101172440A

CN101172440A - Mechanical pin

Info

Publication number: CN101172440A
Application number: CNA2007101851148A
Authority: CN
Inventors: J·拉普斯; D·鲍姆
Original assignee: Faber Castell AG
Current assignee: Faber Castell AG
Priority date: 2006-10-31
Filing date: 2007-10-30
Publication date: 2008-05-07
Anticipated expiration: 2027-10-30
Also published as: CN100500452C

Abstract

The pencil has a lead brake (4) with a cylindrical clamping body (7) for receiving and clamping a lead and axially penetrated from a bore hole (6). A sliding body is provided for axial guidance of the lead brake into a sliding area (3) of the pencil. The sliding body is designed as a sliding ring (13), which encompasses the clamping body (7) with a radial distance, and is connected with the clamping body via a plurality of radical battens (14) with opening (23) between one another, wherein the external surface of each wall sector segements which extend respectively between the two adjacent battens is respectively arranged with a projection (25) which extends along the radical direction.

Description

Mechanical pin

Technical field

The present invention relates to a kind of mechanical pin, particularly a kind of mechanical pencil.

Background technology

A kind of so for example have the bar that is provided with a tip of sleeve shaped roughly by DE 19502779 known pens, be provided with therein a pen core storage and be used for a pen core axial advance, for example by the known propulsive mechanism of DE 3915331 C2 or US 4 896 982.Pen core advances and comprises a clamping device, and it can be handled by an axial efficient pressure or rotating mechanism.Most advanced and sophisticated passed through by a guide channel, this guide channel is connected in the inner chamber of bar and when utilizing propulsive mechanism that pen core is outwards moved from the tip, is used to hold and guides a pen core.The parts that a friction clamps pen core sealedly are set, i.e. a so-called pen core brake in bar.The pen core brake comprises that the columniform clamping body and that clamps pen core of being used to rub that is axially passed through by a hole is used for the slide mass of axial lead pen core brake in the sliding area of a bar sealedly.This slide mass constitutes and is specified to it because elastic restoring force is pressed towards sliding area, so that it can move axially when applying an axial force.For example the slide mass with the pen core brake connects a pen core tubule that stretches out from its tip under the user mode of pen.Because the moving axially property of pen core brake is write base by it is for example pressed to one, can be with pen core tubule shift-in access opening.Clamping body is designed so that it utilizes a frictional force to clamp pen core, and this frictional force is less than the frictional force that produces when pen core brake or slide mass the moving axially in sliding area.

The pen core brake is usually by injection molding.General simultaneously the mould that adopts with a plurality of mould depressions.Originally just only produced problem thus about the tolerance that on the product of making, produces.Also add the tolerance of process decision.When making reservoir tip or sliding area, also produce deviation at last, thereby also cause the big or little frictional force of pen core actuator in sliding area according to the tolerance situation to norminal size.The pen core brake can be therefore needs different power according to the tolerance situation of pen one by one together with returning of the pen core tubule that connects with its in case of necessity, and this is undesirable.

Summary of the invention

Setting out thus the objective of the invention is, and advises a kind of pen, and it is improved in this respect.

Reach this purpose by a kind of pen with feature of claim 1.Its pen core brake comprises that one constitutes the slide mass of slip ring, it surrounds the interlocking clamping body with radial spacing, and be connected with this clamping body via a plurality of radially laths that leave opening each other with it, it is provided with a radially-protruding ledge respectively respectively slip ring on the outside of each wall fan-shaped section of extending between the lath of two vicinities.As described in starting, slide mass or slip ring usefulness radially bias voltage enter in the sliding area of pen axle.Therefore overcoming elastic restoring force radially inwardly pushes each wall fan-shaped section, and this moment, they flattened.The tolerance variations of the pen and the sliding area of the slip ring more or less significant deformation by each wall fan-shaped section or flatten now compensates, and guarantees that the pen core brake moves axially with much at one axial force all the time thereby have nothing to do with corresponding tolerance situation.

Other favourable form of implementation is illustrated in all dependent claims.

Description of drawings

Illustrate in greater detail the present invention referring now to accompanying drawing.Wherein:

Fig. 1 one pushes the axial section of the tip region of pencil;

The perspective view of Fig. 2 one pen core brake;

The pen core brake is from its back or to the perspective view of arrow III direction among Fig. 3 Fig. 2;

Another perspective view of Fig. 4 pen core brake;

The axial section of the perspective of Fig. 5 pen core brake;

Among Fig. 6 Fig. 4 to the vertical view of the direction of arrow VI;

The side view of Fig. 7 pen core brake;

Fig. 8 presses the profile of Fig. 6 cathetus VIII-VIII intercepting;

Among the back of Fig. 9 pen core brake or Fig. 5 to the vertical view of arrow IX direction;

Figure 10 presses the axial section of Fig. 7 cathetus X-X intercepting;

The thin XI of portion among Figure 11 Figure 10;

The pen core brake that Figure 12 one changes is equivalent to the view among Fig. 6.

The specific embodiment

Can find out that as Fig. 1 a pen 1 of the present invention comprises a bar 1b, has most advanced and sophisticated 1a at its front end.In most advanced and sophisticated 1a, has a sliding area 3.The one pen core brake 4 that constitutes the injection molding spare of single type can be set therein with moving axially.Pen core brake 4 comprises a columniform basically clamping body 7, and it is passed through by the hole 6 that a central longitudinal axis 16 that is concentric with its central longitudinal axis or pen core brake extends, and suit one pen core tubule 8 thereon.Make the axial groove 9 of two diametrically contrapositions therein from front end face 5 beginnings of clamping body 7.Constitute the clamping tongue 10 of two diametrically contrapositions in this manner, its within it face be respectively equipped with one radially to projecting inward projection 12.If the propulsive mechanism by means of pen 1 is carried pen core by hole 6, pen core is by projection 12, so radial dilatation clamping tongue 10 and the sealed clamping pen core because elastic restoring force rubs.The rear end of clamping body 7 surrounds interlocking by a slip ring 13 with one heart with radial spacing.Slip ring 13 via at least two, preferred three radially lath 14 be connected in clamping body 7, wherein each radially lath 14 distribute equably along the circumference of slip ring 13.15 one-tenth cylindrical extensions of the outer surface of slip ring 13 and be concentric with clamping body 7 or be concentric with the central longitudinal axis 16 of pen core brake 4.One longitudinal component 18 to that is extended back by the front end face 17 of slip ring 13 is right after thereafter to back end, and 19 second longitudinal components 20 that extend have a small wall thickness.Each of connection clamping body 7 and slip ring 13 radially lath 14 is formed on the inwall 22 of first longitudinal component 18.Its axially-extending is roughly corresponding to the axially-extending of first longitudinal component 18.Because ring 13 extends the opening 23 of circular arc between the radially lath 14 that is fixed on each vicinity on the clamping body 7 via each lath 14.Be formed separately a ledge 25 that radially outward protrudes by the wall fan-shaped section 24 of between the radially lath 14 of two vicinities, extending on the outer surface 15.Each ledge 25 as each radially lath 14 evenly distribute along the circumference of ring 13, but they rotate 45 ° of settings respectively relatively, thereby see that towards circumferencial direction they are being centrally located on each wall fan-shaped section.Extending axially of ledge 25 roughly corresponding to the axially-extending that encircles 13.Each ledge 25 has second conical surface 27 that first conical surface 26 and that extends away from front end face 17 is right after thereafter and almost extends up to the rear end face 19 that encircles 13, and it has a bigger axial length than first conical surface 26.First conical surface is used as the insertion inclined-plane when a pen core brake 4 inserts sliding area 3.

Slip ring 13 is adjacent to the inwall 11 of the cylindrical sliding area 3 of pen tip 1 with its three ledges 25.The diameter of imaginary circumference that surrounds it around the clear span of ledge 25 or is greater than the internal diameter of sliding area 3, whereby inside extruded wall zone 24 and make it simultaneously to flatten radially.This relates to the number of ledge, needs at least two ledges so in principle, so that can guide and support with one heart with moving axially the pen core brake in sliding area.But particularly advantageous is by the three-point support of the pen core brake 4 of equally distributed three ledges 25 along the circumferential direction.Be provided with each wall fan-shaped section 24 of ledge 25 because its little wall thickness is an elastically deformable.Each wall fan-shaped section is easy to flatten or a little radially inwardly push under assembled state, thereby each ledge 25 is owing to be pressed towards the inwall 11 of sliding area 3 in the elastic restoring force of radial direction effect.Because the three-point support multiple spot of pen core brake 4 in sliding area 3 or preferred, one for example the sliding area 3 of tolerance decision compensate with circular deviation moving radially property by ledge 25, thereby even pen core brake 4 also can be by in axial direction moving at sliding area with almost constant power when above-mentioned situation occurring.Also guarantee the centering of pen core brake 4 in sliding area 3 by three-point support.When if each ledge point type or line formula contact with sliding area then especially guarantee this point.The wall thickness of the regional area 31 (Figure 12) by further reducing each wall fan-shaped section 24 can also improve the applicability of 5 pairs of different tolerance situations of slide mass, and this is shown among Figure 12 in the situation of one of three wall fan-shaped section 24.One regional area 31 can be provided with a ledge 25 or in side and its dislocation setting.Because the wedge shape of each ledge 25 or the existence of two

conical surfaces

26,27, each ledge 25 only to interconnect the tip edge 28 of two

conical surfaces

26,27, therefore become the line formula to contact with the inwall 11 of sliding area 3 basically.

The rear portion in the hole 6 by clamping body 7 constitutes the zone 33 that enlarges of flue roughly, and it roughly has the shape of the loudspeaker of loudspeaker.This tubaeform expansion is extended to the rear end face 29 of each lath 14 continuously.The tubaeform form of implementation of the bore region by the back is guaranteed.Replenishing the pen core that provides by a mechanism can enter in the hole 6 without difficulty.

Because the bigger wall thickness of second longitudinal component 20 of ring 13, each opening 23 narrows down in the zone of described longitudinal component, and it has a clear span 30 simultaneously, and it is less than the pen core diameter of corresponding employing, for example less than 0.7mm or 0.5mm.Usually insert the thinnest pen core of pushing in the pencil and have a diameter 0.35mm.Therefore prevent or increase at least a pen core or a pen core break-off portion by an opening 23 difficulty and can enter in the motion guide rail of pen core brake 4.Otherwise the functional fault that this may cause pen core to advance.

A plurality of axial ribs 32, suit pen core tubule 8 (Fig. 1) thereon are shaped on a longitudinal component 32 that extends away from ring 13 of clamping body 7.The pen core tubule has a tap that is passed by a pen core 35 by the hole 34 of a most advanced and sophisticated 1a and at its front end under user mode.Shaping one radial flange 36 on the rear end of pen core tubule 8, the shoulder 37 of the most advanced and sophisticated 1a that its back side interlocking one is roughly radially extended.The diameter 38 of tap 35 is a bit larger tham pen core size or the pen core diameter that is applicable to pen accordingly.The clear span 30 of above-mentioned opening 23 is for prevent should be less than the diameter 38 of tap 35 or less than the diameter of the pen core of corresponding employing by pen core or pen core break-off portion.

Pen core brake 4 clamps a pen core (not shown) in this wise under situation shown in Figure 1, promptly utilizes common write pressure and just can utilize pen.Be in the way from its pen core that stretches out at the pen core tubule 8 and that does not stretch out from most advanced and sophisticated 1a between the operating period.In order to eliminate this drawback here by pushing of a base at first pushed back the pen core that stretches out, because pen core brake 4 clamps pen core with a power, this power is less than moving axially required power for pen core brake 4 in sliding area 3.At last pen core tubule 4 is pushed back in the most advanced and sophisticated 1a.By handling the propulsive mechanism (not shown) and making pen core move the exit position that arrives once more by Fig. 1 over there to most advanced and sophisticated 1a.

List of numerals

1 18 first longitudinal component

Most advanced and sophisticated 19 rear end faces of 1a

1b bar 20 second longitudinal components

2 access openings, 22 inwalls

3 sliding areas, 23 openings

4 pen core brakes, 24 wall fan-shaped section

5 end faces, 25 ledges

6 holes, 26 first conical surfaces

7 clamping bodies, 27 second conical surfaces

7a central longitudinal axis 28 tip edge

8 pen core tubules, 29 rear end faces

9 axial grooves, 30 clear span

10 clamping tongues, 31 regional areas

11 inwalls, 32 axial ribs

12 protruding 33 zones

13 slip rings, 34 holes

14 lath 35 taps radially

15 outer surfaces, 36 radial flanges

16 central longitudinal axis, 37 shoulders

17 front end faces, 38 diameters

Claims

1. mechanical pin, comprise that a propulsive mechanism, that is used for pen core is provided with a bar (1b) and the pen core brake (4) of a tip (1a), wherein the pen core brake have one columniform basically, axially pass through by a hole (6), be used to hold the slide mass that relative with a clamping body with the clamping body that clamps a pen core (7) is radially enlarged, be used for axial lead pen core brake in a sliding area (3) of pen (1); It is characterized in that, slide mass constitutes slip ring (13), this slip ring surrounds interlocking clamping body (7) with radial spacing, and be connected with this clamping body via a plurality of radially laths (14) that leave opening (23) each other, and on the outside of each wall fan-shaped section (24) of extending between the two contiguous laths, a radially-protruding ledge (25) be set respectively respectively at slip ring (13).

2. according to the described pen of claim 1, it is characterized in that slip ring (13) has three radially laths (14) and correspondingly have three wall fan-shaped section (24) and three ledges (25).

3. according to the described pen of claim 2, it is characterized in that at least one in the described protuberance (25) seen at the center towards circumferencial direction and be arranged on the wall fan-shaped section (24).

4. according to claim 2 or 3 described pens, it is characterized in that at least one protuberance (25) point type or line formula contact with sliding area (3).

5. according to claim 2,3 or 4 described pens, it is characterized in that that each ledge (25) has is that a front end face away from slip ring (13) (17) extends, to most advanced and sophisticated (1) diminishing conical surface (26) over there.

6. according to the described pen of claim 5, it is characterized in that, each ledge (25) has one second conical surface (27), this second conical surface be connected in first conical surface (26) and backward the tip of the brushstyle of a writing or painting dwindle gradually over there, wherein two conical surfaces via one along the circumferential direction extend change over to mutually with the contacted tip edge of sliding area (3) (28).

7. according to one of claim 2 to 6 described pen, it is characterized in that at least one wall fan-shaped section (24) has the regional area (31) that a wall thickness reduces.

8. according to the described pen of claim 7, it is characterized in that regional area (31) is provided with a ledge (25).

9. one of require a described pen according to aforesaid right, it is characterized in that each opening (23) sees to have a clear span (30) towards radial direction, this clear span less than one in most advanced and sophisticated (1a) tap (35) existence, that pass by a pen core in user mode.

10. one of require a described pen according to aforesaid right, it is characterized in that, axially the rear portion in the hole (6) by clamping body (7) towards the rear end of pen over there roughly flue enlarge.