JPS5993397A - Automatic lead feeding type note - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a writing instrument in which automatic lead feeding and automatic following of a subsequent lead are carried out during writing, which comprises an axially movable lead guide tube having a lead brake. and at least a clamping device consisting of a forceps-like clamping body that opens in the radial direction and a clamping stone ξ, and both the core guide tube and the clamping body arranged between the core guide tube and the clamping body. a compression spring acting on the
In this case, the above-mentioned tightening body and tightening stone 2
It relates to something that has a long lifespan so that no self-restrictive effects occur between them.

A writing instrument of this type is known, for example, from DE 30 32 200 A1.

However, in this writing instrument, due to the compression spring disposed in a direct and constantly operative connection between the lead guide tube and the forceps-like clamping body, the clamping body and the lead stick to each other when not used for a relatively long period of time. There is a tendency for the core to become cold brittle, which can lead to failure in either case. Furthermore, in known writing instruments, the lengths and forces of the compression barbs and other cooperating parts must be very precisely matched to prevent them from breaking, which makes the writing instrument difficult to manufacture; In some cases, it can be expensive.

According to German Patent Application No. 2 611 608, a forceps-like clamping body has a web on its end side, in which a sleeve attached to a core guide tube is movable in the axial direction. The information listed in this guide is publicly known.

The lead guide tube is urged towards the tip of the writing instrument, inter alia, by a spring arranged on it, while a further spring acts on the clamping body in the opposite direction. In this case too, in particular the two springs must be matched very precisely to each other and a special thrust bearing is required for the clamping body. Furthermore, automatic tracking of the following core is not possible,
For follow-up feeding of a subsequent core, the push knob must be actuated, thereby manually opening the clamping mechanism so that a new core can be grasped by the clamping jaws of the clamping body.

U.S. Pat. No. 3,424,535 proposes that a writing instrument be provided with a plurality of forceps-like clamping bodies or clamping jaws that engage one another inwardly and outwardly. Two of these clamping bodies or clamping jaws are provided with webs projecting from their end sides, around which compression springs are arranged. The compression spring acts directly on one clamping jaw on the one hand and indirectly on the core guide tube on the other hand. This proposal as a whole would result in a writing instrument that is extremely complex and expensive, and is also extremely prone to failure due to the large number of parts that engage in and out of each other.

DE 21 53 400 and U.S. Pat. No. 3,864,046 describe two further lead-feeding writing instruments, which include an axially movable lead guide tube and a forceps. It has a compression spring disposed between it and the clamping body. In the case of these writing instruments as well, extremely complex tightening and spring mechanisms have been proposed that are difficult to harmonize with each other, and the mechanism has an extremely high failure rate due to the large number of parts that cooperate with each other. It has frequency.

Therefore, an object of the present invention is to enable a relatively wide manufacturing tolerance for a writing instrument that automatically feeds a lead and automatically follows a subsequent lead during writing, and can be manufactured at a low cost. , and to have a particularly reliable function and to ensure that the lead is held with as little pressure as possible, especially in the rest position, so that writing can be carried out for long periods of time without failure and without additional manual intervention. be.

This problem is solved by the invention having the features described in claim 1.

On the end side of the forceps-like clamping body there is assigned an axially oriented web and a stop collar, between which a compression spring is arranged with a direction of action parallel to the axis of the writing instrument, and The compression spring transmits a pressing force radially and axially directly or indirectly to the stone ξ collar via at least one contact point and also via a contact surface to or to the core guide tube. In the part placed in
The operative connection makes it possible to compensate for manufacturing tolerances in a very simple manner, so that the side parts can be manufactured relatively easily and there is sufficient assembly play. Furthermore, the solution described above significantly improves the clamping action and the overall operation of the clamping body, resulting in particularly reliable functioning and trouble-free core transport. Additionally, compression springs and stones.

The point of contact between the collars is such that the axial force of the compression spring is converted into axial and radial pressure, and the measured force causes axial dissociation and radial opening of the clamping jaws of the clamping body. Due to this construction, the clamping body is always open in the rest position f. This allows, on the one hand,
The first wick always remains untightened, since it is merely held by the wick brake, and furthermore, the subsequent wicks are connected to each other by the end braking of the first wick. It can fall through the side body, which ensures automatic following of the following core.

In the writing instrument according to the invention, the clamping body consists of two or more radially movable clamping jaws which are in contact with each other or connected to each other at their rear ends. It is also possible to construct it in one piece or to consist of individual segments. The clamping body usually has a radial slit, a hole enlarged at the rear and a recessed line hole for holding the core immobile, possibly with teeth or other clamping means, and is made of metal. , can advantageously be made of brass or relatively hard plastic.

The web extending from the end side, preferably at right angles, has a particularly high bend in order to be able to transmit the radial force of the compression spring as completely as possible to the contact area of the clamping body. It is desirable that it be made strong and non-elastic.

The stone collar extends radially inward and serves as an abutment support for the compression spring, either directly or via a restraining insert, or as an axial limiter towards the tip of the writing instrument; The stone ξ collar, together with a compression spring or a restraining insert, by means of an at least conical, preferably sloped surface of 45°, converts the axial spring force into an axial thrust, possibly somewhat less. , radial expansion force and deflection.

If the compression spring itself does not have an effective compression edge on its end side, a pressure insert is arranged between the compression spring and the stone collar, on which the compression spring is supported and It is particularly advantageous if the restraining insert loads the stop collar without self-locking, so that a contact point without self-locking occurs between the image parts.

The web and the stopper collar are usually arranged in a cage around the compression spring and the optionally arranged pressure insert, so that these parts have radial play within the web and the stopper collar and are easily It is held movable.

The compression insert can have an extension towards the spring and/or towards the core guide tube, which extension centers the compression spring and/or the compression insert in the stone collar. The abovementioned addition can also be made as a contact addition for the core guide tube.

However, in a simple form, an extension of the core guide tube directed into the shaft tip can also serve as a contact addition, whereas a compression spring or a pressure insert can serve as a contact surface that rests on said extension. , the contact surface itself being optionally arranged within the centering part.

In order to prevent the compression spring or the compression insert from being tightened and locked, the contact points must be made so that they do not have a self-locking effect on the stop collar. For this purpose, it is suitable on the one hand to use a conical pressure ramp or a pressure stock ξ, and on the other hand to use a pressure edge, in which case it is in principle possible to use any type of contact on any part. may be formed. It is particularly advantageous in this case for the contact point to be formed by two sloped surfaces that touch and slide against each other. The cone angle or angle of inclination of the slope or restraint slope and/or the pressing stock is such that the spring force, which is initially directed exclusively in the axial direction, cooperates with the gravity of the other movable parts of the clamping device to tighten it. It is advantageous to choose such that it produces a spreading force acting radially on the clamping jaws of the attachment body and a larger axial force.

This is easily accomplished by having a 45° slope. Because of this angle of inclination, on the one hand, the spring force is divided evenly, and on the other hand, the gravitational force of the movable parts of the clamping device, in particular the forceps-like clamping body, directs the axial force into the desired direction. This is because it increases the The angle of inclination may, however, also be affected by special frictional, weight or other spring elasticity conditions, for example when a forceps-like clamping body or its clamping jaws have an inherent spring elasticity radially inwards or outwards. , can be changed. In such cases, care must be taken, among other things, to always have good separability and to avoid any self-locking effects.

In the writing instrument of the present invention, in order to ensure that the clamping body is always opened evenly and can be opened immediately even when the clamping pressure is small, the clamping body, the clamping sleeve, and the sliding sleeve Alternatively, it must be constructed so that no self-locking effect occurs between it and the tightening stock ξ provided directly on the casing. For this purpose, the spheres as rolling elements or the disks or rolls are supported in recesses of the clamping body or clamping sleeve and rest against a sliding cone surface, which preferably has a hard surface. is particularly advantageous. By forming the contact surface in a conical shape, even when the cone angle is relatively small, it is possible to provide each assembled member with a relatively large tolerance without causing a self-locking effect.

Instead of rolling elements, it is also possible to provide contact edges, such as at contact points in the stone ξ collar, which contact edges rest on contact cone surfaces or sliding cone surfaces and selectively engage the clamping body. Or it can be placed in the line side sleeve.

In order to keep the ineffective suppression distance of the core guide tube as short as possible, the core guide tube and the compression spring as well as any intermediate parts, such as contact extensions and/or suppression extensions, are permanently in operative connection with one another. It is advantageous to do so. For this purpose, all functionally cooperating parts, in particular those parts extending along the axis of the writing instrument, must be harmonized with each other, so that the core guide tube and the compression spring The compression spring (or compression insert) and the spring collar should contact the contact surfaces between them without play or with as little play as possible.

The greater the intended manufacturing tolerances, the correspondingly greater the play in the area of the contact surface, for example, unless there is any other compensation in the area of contact between the clamping body and the clamping stock ξ. Can be configured.

The function of a writing instrument is that when the lead guide tube is brought into contact with a writing surface or a paper surface, and when the lead guide tube is used for writing, the writing instrument or It is activated by moving the writing instrument from its rest position to its writing position by sliding into the shaft tip. By separating the contact points in this case or by separating the compression spring or the restraining insert from the stone ξ collar and simultaneously increasing the clamping force of the compression spring directed against the clamping body, the clamping body is moved axially backwards and radially inwardly due to the inclination of the sliding conical surface or the contact conical surface. In this case, the radially directed clamping force of the clamping body on the core is increased until its axial clamping force becomes greater than the axial holding force of the core brake, so that the core is It is held immobile by a chisel and becomes writable.

During writing, the lead guide tube can be slid into the shaft tip together with the core brake until, at most, the guide tube end surface is flush with the end surface of the shaft tip. At the latest at this time, but usually significantly earlier, the writing instrument is lifted and placed on the paper again.

Upon or after separation of the lead guide tube from the writing or paper surface, the lead guide tube is subjected to the axial force of a compression spring which transmits a force to the lead guide tube via the contact surface and possibly the contact attachment. Based on this, it slides forward until it comes into contact with the stone ξ, thereby converting the writing position to the rest position. However, before the core guide tube comes into contact with the stone, the clamping body is moved axially forwardly and radially outwardly via the contact point of the compression insert with the compression spring or the spring or o-collar. I am forced to do it. This eliminates the radial clamping action or force of the clamping body and releases the core. Based on the holding force of the lead brake, the lead is then conveyed forward, in other words towards the tip of the writing instrument, during a further axial forward movement of the lead guide tube, whereby the writing instrument is newly prepared for shipping. become a state.

According to the invention, the forceps-like clamping body or its clamping jaws are always open in the rest position, so that the subsequent core can fall through the clamping body or its clamping jaws, or It can be reliably held and transported while abutting against the rear end of the lead currently in use.

In order to prevent the axial pushing force on the lead from becoming excessively large, for example due to high writing pressure, it is necessary to use a tightening sleeve or a line side stock! ! It is advantageous to design the part containing it as an axially movable sliding sleeve. This allows the entire tightening device to escape upwards or backwards. The sliding sleeve can be freely movable or can be loaded by a balance spring, the pressure of which can be selected according to the respective needs, or can be provided with suitable means. It may also be possible to adjust to different values, for example by means of a corresponding support which can be moved in the housing.

The axially forward pressing force, including the gravity of all axially movable parts, such as the clamping device, the sliding tube piece and the sliding sleeve itself, is combined with the opposing force of the compression spring. It is advantageous to make the shi also slightly dog-like. The magnitude of the pressing force may optionally also be selectable or adjustable to different values as a function of the hardness of the core or the wear properties of the core.

The writing instrument of the present invention can be used particularly advantageously as a hand writing instrument. By making the shaft of the writing instrument compatible with a receptacle of an automatic writing device or automatic drawing machine, etc., or by manufacturing the receptacle so that the receptacle is compatible with a writing instrument shaft, the writing instrument of the present invention can be adapted to these devices. or can be used extremely well in machinery,
This provides extremely advantageous working conditions.

The invention further provides a writing instrument with automatic lead feeding during writing, comprising at least one shaft, a lead reservoir, and a writing instrument that slides axially within the writing instrument tip and projects from the writing instrument tip. , a core guide tube with a core brake and optionally a sliding piece, a forceps-like clamping body and a line side switch I.
The present invention relates to a non-self-locking clamping device consisting of a spring and, optionally, a spring acting on the clamping body and/or the core guide tube and a consuming core.

In the above-mentioned type of writing instrument, the conveyance of the lead to the tip of the writing instrument is normally carried out by moving the lead guide tube and the lead against the action of the clamping device by touching the writing surface during writing. This is done in the form of closing the tightening device. Thereby, the lead is held immovably against the writing pressure. When released from the writing surface, the lead guide tube is moved forwards or downwards, as the case may be, by the action of a contact spring, the lead held by the lead brake carrying out the above-mentioned forward movement together, and in this case simultaneously moving the line. The side bodies are opened, so that the core is released from the clamping body.

Federal Republic of Germany Patent No. 2837586, German Patent Application No. 2611608, German Patent Application No. 3032200, German Patent Application No. 3112869 and No. 3
No. 229497 describes a writing instrument of the type mentioned above. The known writing instruments or the writing instruments described in the above specification are however extremely complex in construction and have to maintain very narrow manufacturing tolerances. This also has the disadvantage of being extremely expensive to manufacture or of having relatively long sliding distances in which the idle inner pipe does not function. It is therefore an object of the present invention to provide a particularly inexpensive self-feeding writing instrument which allows large axial manufacturing tolerances, especially in the area of the tip of the writing instrument, without adversely affecting the writing performance. Our goal is to provide the following.

According to the invention, this problem can be solved very easily by providing a fall stopper for the clamping body and a sliding brake for the inner pipe. It is solved in a format.

The invention will now be explained with reference to the illustrated embodiment.

The writing instrument 1 shown in FIG. 1 is in the "rest position". The housing 3, into which the shaft tip 31 is screwed, contains a clamping sleeve 78 with a closure 76, which has a sliding conical surface 73 and a partially widened opening. An additional portion 37 having an opening 74 and located on the casing 3 (shaft) and the shaft tip portion 3
1 and is fixed immovably in the axial direction. The closing part 76 has an entry slope 77, in which a refill, which is optionally placed in the lead storage part 8, automatically slides into the closing part 76 and into the center hole of the forceps-like clamping body 40. The line side sleeve 78 is closed from the upper side, that is, from the rear side of the writing instrument, and the lead storage section 8 is closed from the lower side.

The wire side body 40 disposed within the tightening sleeve 78 has a collar 43 at the end 42 of its shaft portion to prevent it from falling out, and may also have an additional weight, and A split slit divides the clamping jaws into radially flexible or possibly spring-elastic clamping jaws, which are open in the position shown.

In the recess 4δ there is a spherical rolling element 47, which on the other hand rests on the sliding conical surface 73.

Inside the shaft tip 31, there are an insertion slide 21 that abuts against a stopper 35 and is movable in the axial direction, and an inner tube 2. In this case, the insertion slide 21 is connected to a core brake 22 (the core brake 22 (which in the position shown merely holds the wick 5) and a contact extension 23, and the inner tube 2 is immovably connected to the wick brake 22 and the insertion slide 21; In the illustrated rest position, it projects from the shaft tip 31 to the maximum extent possible. When disassembling a writing instrument, the end part is used as a member to prevent it from falling off.27
is immovably arranged in the shaft tip 31, and this end stop lug 27 may, for example, have a screw for stopping the insertion slide 21; If there is no boxwood 43 on the end portion 42 for preventing removal, the insertion slide 21 can be brought into contact from below and the groove fastening body 40 can be brought into contact from above.

According to the present invention, in such a writing instrument, the tightening device 4
Alternatively, the clamping body 40 includes a web 44 with high bending strength, which extends in the axial direction from the end face 4-1, and a stop collar 45 facing radially inward, which is immovably arranged on this web 44-. The stop horn ξ collar 45 has a conical suppression stopper 46.

In the web 44 there is an axially acting compression spring 60, which on the one hand is attached to the end face 41 of the clamping body 40 and on the other hand to the pressure insert 61 which also belongs to the web 44. The spring spring 54 rests in a compressed manner on the rear surface. The suppressing insert 61 has a suppressing bevel 66 on the side of the stop collar 45 and, in addition, a contact surface 63 emanating from the through hole 62 as well as a centering section 67 for the rear end of the contact extension 23 . have. A slight gap may occur between the contact surface 63 and the end surface of the contact adding portion 23 at the "rest position" where the writing instrument l is away from the paper surface 100.

FIG. 2 shows the writing instrument 1 in "1 writing position", in which the core chamber tube 2 and the core 5 are at the plane of the paper.
0 or is connected to the writing surface in a state where writing pressure is generated. In this case, the stopper 35 in the shaft tip 31 screwed onto the casing 3 (shaft) is open. This is because the insertion slide 21 is in a pushed position into the writing instrument 1 together with the insert, which has a cutout for receiving the core brake 22 and to which the core inner tube 2 is fixed. It is from. The contact application portion 23 is in contact with the contact surface 63, and the pressing insert 61 is
The forceps-like clamping body 40 is pushed backward against the action of the compression spring 60 that is in contact with the end surface 41, and as a result, the clamping jaws of the clamping body 40 are pushed in. It is closed via the rolling elements 47 that slide smoothly on the sliding conical surface 73, and the core 5 is held immovably. The end stop 27 additionally serves in this case as a guide sleeve for the insertion slide 21. In order to ensure a good introduction of the contact extension 23 into the centering part 67 of the end stone ξ 61, the contact extension 23 has a centering cone 24.

The compression insert 61 includes a spring stock 54 and a guide 65 for concentrically receiving and abutting the compression spring 60.
It also has a pressing slope 66 which has a through hole 62 and is open in the illustrated position, and after the writing instrument is released from the paper surface]-〇〇, the pressing slope 66
-4- contacts the pressing stopper 4G of the stopper collar 45 which is connected to the clamping body 40 with high bending strength via the clamping body 40, and pulls the clamping body 40 or its clamping body 40 downward, Due to the action of the slope at the point of contact, it is also pushed open in the radial direction, so that the core 5 is clamped and released from the jaws. At the end 42 of its shank, the clamping body 40 has a barb 43 which serves as a guide for the slide 9, and the clamping body 40 is also in this embodiment largely arranged inside the clamping sleeve 78. This clamping sleeve 78 is arranged in the housing 3 and is closed, on the one hand, by a closing part 76 with an entry bevel 77 and, on the other hand, by a fixing ring 75, so that the clamping sleeve 78 is The attachment device 4 as a whole forms a closed assembly unit, which unit as a whole is intended to be inserted into the casing 3. The through holes 62 in the suppression insertion piece 61 and the closing portion 76 each have a relatively large hole diameter, and the tightening body 40
Inside the enlarged perforation hole and the core storage section 8, the cores 5. A follow-up lead 51 as well as a refill 52 are located, all of which can actually be completely consumed by writing without any modification.

In FIG. 3, the shaft tip 31 is shown enlarged without a core; in this variant embodiment, the core inner tube 2 is connected to the insert 2.
5, which insert simultaneously forms a core brake 22 and is surrounded by an insert slide 21 which has a contact extension 23 with a centering cone 24. In this case, the insertion slide 21 or the insert 25 rests against the stop 35. The end stopper 27, which is provided several times in the shaft tip 31, is machined with split slits and has a sliding brake 26 that abuts against the contact addition portion 23 with a radial spring force. .

This influences the free sliding movement of the tube 2 in the core chamber, if necessary.3 A fixing ring 75 is fixed in the pay sleeve 7, and the large hole in this ring is pressed against the stopper collar 45. Stotsuno′? A web 44 with 4G runs through it. .

The pressing stone 46 has a pressing slope 66 of the pressing insert 61.
is in abutment, and a compression spring 60 centered by a guide 65 is supported on its spring stone e54; As with the contact addition portion 23 that is not connected, the through hole 62
, the diameter of which is larger than the diameter of the wick, which is not shown in this drawing, so that the wick can fall in front of the wick brake 22 due to play.

According to FIG. 4, the stop collar 45 arranged on the web 44 has an inclined pressure stop 46, whereas the pressure edge 68 of the pressure insert 61, which is made in one piece with the compression spring 60, has both parts. A contact point of (45, 61) is formed. The core 5 is located within the contacting portion 23 with some play. This restraining insert 61 can in this case be made of a hard but spring-elastic plastic together with the compression spring 60 or an equivalent spring leaf.

In the embodiment of FIG. 5, a conventional coil compression spring 60 has a pressing edge 68 and a contact surface 63 formed directly on the compression spring 60, on which the contact extension 23 is supported. There is. Also in this embodiment, a web 44 extends parallel to the axis from the forceps-shaped clamping body I.
It continues to Buckwheat Color 45. The core 5 is in this case held apart from the clamping body 40 by a core brake (22), which is not shown.

In the embodiment of FIG. 6, a restraining insert 61 is shown inside the web 44 and abutting the stop collar 45;
It has a guide 65 for centering the compression spring 60 as well as a contact abutment 23 for possibly directly influencing the upper guide tube 2.

In the embodiment of FIG. 7, the wick 5 is held by a wick brake 22 arranged in the inner tube 2, which at the same time also serves as a sliding brake 26 in the shaft tip 31. At its axially inner end, the idle inner pipe 2 loads directly onto a spring-loaded restraining insert 61, which presses its conical thrust horn 84.
6, it abuts the pressing edge 68 of the stopper collar 45 in a point or annular manner. The clamping body 40 has an inclined contact cone 49
, which together with the inner contact edge 72 of the end face 71 of the sliding sleeve 79 form the contact of the two parts (40, 79). In this case, depending on the pressure and friction conditions in each case, the angle of inclination of the two pressure ramps is varied in such a way that a satisfactory function is ensured.

FIG. 8 shows a writing instrument 1 according to an embodiment of the invention, the entire clamping device 4 of which is moved in the axial direction by a sliding sleeve 7g against the spring force of a lance spring 96 in the casing 3. It is possible.

- The ζ lance spring 96 is arranged axially together with the movable core tube 81 of the core store 8 and is supported on the one hand on this core tube and on the other hand on the shoulder of the casing upper part 33. The upper part 33 connected to the central part 32 further includes a clip 94 held by a clip ring 95, a closure part 34 and an eraser 9 with needle and tube.
There is 1. The rest of the construction of the parts important to the invention is the same as that of the embodiment of FIG. 2, but in this FIG. 8 the writing instrument 1 is shown without lead and in the rest position.

The writing instrument of the present invention shown in FIG.
, an eraser 154 with a retaining ring 155 and a cleaning needle 156, a closure cap 157 and a clip 158.

Inside the writing instrument 101 there is also a lead storage 153 and a tightening device 104, which is primarily spring-loaded by a compensating spring or ζ-lance spring 106, which in this case is movable in the axial direction. Tightening sleeve 141
It also consists of a forceps-like clamping body 143 which is also axially movable and has a shaft part 145, a collar 146 and a clamping rolling element 147. The clamping stopper 140 is formed by a clamping rolling element 147 that contacts the clamping conical surface. The tightening rolling element 1 is removed by the falling prevention member 159.
47 is prevented from unintentionally coming off from the pay device 104. The clamping body 14-3 has a web 149 in the front area.
has a pressing collar 148 located at the inner slope of the pressing body 150 , which is loaded by a contact spring 152 .
It serves as an abutting portion for the pressing inclined surface 151 of. An insert 125 is immovably arranged within the shaft tip 121.
, which fixes the sliding brake 134 in the axial direction and forms a falling stop lug 135 .

The guiding tube 103, which is axially movable within the shaft tip 121, has a sliding piece 131 with a contact piece 133 and a core brake 132.

The end surface of the sliding piece 131 is spaced from the bottom surface 122 of the sliding hole 124 by a permissible distance in the illustrated "rest position". This is because the writing instrument 101 is lifted from the writing surface 200 and the sliding piece 131 together with the guiding tube 103 is held in a frictional manner by the sliding brake 34. The opening distance a is zero in this case.

The distance of contact surface 163 is shown enlarged.

FIGS. 1○ and 11 show a writing instrument 101, which in principle is the same as the writing instrument shown in FIG. Figure).

In this case, the changes in position of the axially movable parts are respectively indicated by curved lead lines (relative to FIG. 11). The opening distance a is zero in the rest position (FIG. 10), whereas it is visible in the writing position (FIG. 11), and the distance C is formed from the opening distance a, the tolerance distance and the writing distance. .

When the writing instrument 101 is in the rest position of FIG. 10, the jaws of the clamping body 143 are open. This is because the suppressor 150 presses the jaw against the collar l under the action of the contact spring 152.
This is because it moves radially outward and axially forward (or downward) via the cow 8, at the point where it contacts the drop stopper 135. The maximum value of the opening distance a, which is therefore dependent in particular on the construction of the clamping body and on the thickness and nature of the core (11o, not shown here), should therefore be as small as possible.

In the rest position (FIG. 10) the opening distance a is zero.

When the writing instrument 101 is separated from the writing surface 100, the sliding piece 131 and the guiding tube 103 are moved through the pressing body 150 and the contact piece 133, and the clamping body 143 and/or
The suppressor 150 is moved forward until it hits the drop stopper 135. In this case, a core (not shown) (1
10) are moved forward or downward together under the action of the radial holding force of the core brake 132.

As soon as the axial movement of the clamping body 143 or the suppressing body 150 ends (when the opening distance a becomes zero), the sliding piece 13
1 or the axial forward movement of the guide tube 103 also ends. This is because it is held immovable by the radial holding force of the sliding brake 134.

Therefore, the axial pressing force of the contact spring 152 must be greater than the axial holding force of the sliding brake 134. However, on the other hand, the axial holding force of the sliding brake 134 is limited to the sliding piece 131 and the cores (110, 111
3. In order to effectively brake the part marked 2 when the spring force no longer acts effectively than the axial gravity of the guide tube 103, including Base 122, sliding hole 124 and sliding piece 13
The axial free space left between the leading edges of 1 can be chosen to practically any size given the tolerance distance;
Alternatively, it can be formed relatively thick based on manufacturing tolerances. The functionally ineffective sliding distance of guide tube 103, which first had to be overcome at the beginning of writing, is thereby no longer caused by the action of sliding brake 134. The core is held immovable in this rest position only by the holding force of the core brake 132. This is because the clamping body 143 is open.

By the way, as shown in FIG.
03 moves axially into the shaft tip 121 against the action of the contact spring 152 during writing or when its tip contacts the writing surface 200, the clamping body 143 closes and the core (110) is held securely immovable against axial writing pressure. The axial retraction movement of the clamping body 143 is effected in this case by the contact piece 33 via the pressure body 150 and the contact spring 152.

When a relatively long line or character is drawn without moving away from the writing surface 200, the guide tube 103 uses the pressing force of the contact spring 152 as well as the core brake 132 and the sliding brake 134.
into the shaft tip 121 by overcoming the axial braking force of
until the inner stop is reached or the shaft tip 121
The leading edge 126 of the lead guide tube 103 contacts the writing surface 100 and slides into the writing surface 100 until the front edge 126 of the lead guide tube 103 is in a horizontal plane with the tip of the lead guide tube 103 . The clamping sleeve 141 of the clamping device 104 can in this case be arranged stationary or axially movable in the shaft 102. FIG. 12 shows two alternative embodiments of the writing instrument 101 according to the invention. In this case, each fall stopper 135
(shirt) 102C top half) or shaft tip 1
21 (bottom half of the drawing).

The sliding brake 134 is in this case additionally associated with the core brake 132 or is made in one piece and acts directly on the wall of the sliding hole 124. The sliding brake partially projects radially from the sliding piece 131.

The writing instrument 101 is in a writing position, and in this case, the writing tube 10
3 and the lead 110 are attached to the writing surface 2001.

In this case, the distance C is the tolerance distance, the opening distance a, and the sliding piece 1.
It is formed from 31 already advanced writing distances or effective sliding distances. The drawings show a different shaft 102, a core reservoir 153 containing a subsequent core 111, with an inter-reservoir chain 161 made as a conical hole, and a clamping body 1.
A stone ξ collar 146 molded on the shaft portion 145 of 43 is shown, and the tightening sleeve 14 is further shown in the lower half of the drawing.
1 is shown, and a tightening stopper 140 is formed on its tightening conical surface 142 in the contact area of a tightening rolling element 147. A sliding piece 131 having an inner contact extension 133 is arranged in the sliding hole 124 of the shaft tip 121 so as to be movable in the axial direction, together with the guide tube 103 and the core brake 132 and the sliding brake 134 . The distance C is limited by the bottom surface 122 and the end surface of the sliding piece 131.

FIG. 13 again shows the two embodiments in the rest position, in which case in the upper half of the figure the stop bar 146 is subsequently inserted onto the shank 145 of the forceps-like clamping body and the shaft 102 is shown in FIG. It abuts a drop-out lug 135 molded into the clamping sleeve 141, which is immovably arranged therein.

In the lower half of the drawing, the end surface of the forceps-like clamping body 143 is in contact with the falling horn ξ 135, which is formed by the bottom surface of the notch 162 in the insert 125'. The insert 125' is arranged immovably in the shaft tip 121 and has an O-ring as a sliding brake 134, which acts on the outer circumferential surface of a contact piece 133 arranged on the sliding piece 131. The end face of the sliding piece 131 that receives the core brake 132 and guide pipe 103 and the sliding hole 1
24 and the bottom surface 122 forms in this case also a tolerance distance, which should in any case remain within a small range in order not to impair the reliable functioning of the writing instrument 101. It is.

The writing surface 200 is connected to the guide tube 10 at the writing stop position.
3 and/or the core 110, and the forceps-like clamping body 143 or its collar ξ collar 146 is in contact with the drop stopper 135, so the opening distance a is zero. In this case, the hole wall surface of the notch 162 is simultaneously connected to the clamping body 1-4.
It also serves to limit the radial opening distance of the 3 jaws.

According to FIG. 14, the writing instrument 101 has a shaft tip 12.
1 has an insert 125 inside which is partially stamped and/or molded a sliding brake 1.
34 is directly formed. The sliding brake 134 in this case exerts a radial pressure and an axial holding force or axial braking force on the contact piece 133 formed directly on the sliding piece 131 holding the core brake 132 and the guide tube 103 . The opening distance a is also zero in this case. This is because the writing instrument is not yet attached to the writing surface 200,
In addition, in this case, the forceps-like clamping body (14
3) Or, this is because the suppression collar 148 arranged on the web 149 is in contact with the falling point ξ135. , so that no other axial pressure forces are acting on the sliding piece 131. The tolerance distance is maintained by the action of the sliding brake 134-.

In the writing instrument 101 of FIG. 15, the clamping body 143 is constructed as an internal falling body, so that it may not be necessary to arrange a spring. A tightening sleeve 141 is disposed movably or immovably in the axial direction in the shaft 102.
A clamping force is applied in the radial direction via the clamping conical surface 142 and the clamping rolling element 147, and is applied to the clamping body 143 and the core (110, not shown) while being held in the axial direction. There is.

The end face of the clamping body 143 is in contact with the falling stop horn ξ135, and as a result, the opening distance a is also zero. This is because the writing instrument 101 is not in contact with the writing surface 200. A sliding brake 134 is held by the insert 125 and serves to maintain the tolerance distance. The sliding piece 131 in this embodiment also has a contact piece 133 and a core brake 132 and serves as a receptacle for the guide tube 103 by means of a filler 137 .

Due to the action of the sliding brake 134, any magnitude of the tolerance distance between the bottom surface 122 and the end face of the sliding piece 131 does not have any influence. This is because the sliding piece 131 and, by extension, the guide tube 103,
When the sliding brake 134 is working, this tolerance distance 1
) does not move in the axial direction.

If there is no sliding brake, the guide tube 103 will move forward under its own weight. In this case, at the beginning of writing, the respective tolerance distance results in an ineffective sliding distance, resulting in a short "idling stroke", which is often felt unpleasantly by the user of the writing instrument. The same thing occurs when the opening distance a of the clamping body 143 is not limited to the minimum value. This limit is the fall stopper 135
achieved by.

If guide tube 103 is constructed without sliding piece 131, it is even possible to omit the forward axial end stop completely due to the action of the groove brake.

This is particularly advantageous when the guide tube 103 is optionally designed to be exchangeable, for example with a guide tube having a different core.

The axial braking force of the sliding brake 134 is the core brake 132
If the core 110 is smaller than that of the sliding piece 131
During forward movement, the radial holding force of the core brake 132 overcomes the axial braking force of the sliding brake 134 and causes them to move forward together.

Particularly if it is desired that the wick protrudes from the tip of the guide tube 103, it is advantageous for the axial braking force of the sliding brake 134 to be greater than the axial braking force of the wick brake 132. be. By doing so, during each forward movement the guiding tube 103 or the sliding piece 131 is held somewhat backwards, whereas the core is forced to overcome the axial braking force of the core brake 132 and further forward (or (downward) movement.

To this end, however, the entire tightening device 104 is spring-loaded, for example by a nono lance spring 106, as shown in FIG. 9, so that when writing pressure or the like acts, at least a portion Therefore, it is advantageous, and in some cases necessary, that the axial pressing force of this lance spring 106 is also overcome. When the writing pressure is removed or when the writing instrument is separated from the writing surface 200, the clamping device 10, together with the lead 110, first extends the lead protrusion length (which is limited by the contact surface 163 and remains at the desired length). , and slides forward by the pressing force of the spring 106 against the axial pressing force of the contact spring 152. In this case the axial braking force of the core brake 132 has to be overcome.

For example, when the contact surfaces 163 disposed on the clamping body 143 and the pressing piece 150 are in IC contact with each other, the core inner tube 103
Alternatively, the sliding piece 131 fixedly connected to the spring 1
It is forcibly moved forward by the axial pressing force of 06 until it reaches the rest position. This results in a core protrusion, i.e. a core section freely protruding from the core chamber tube 103, the axial length of which can be selected arbitrarily as required and is referenced by the mutual spacing of the contact surfaces 163. It is possible to confirm by

This protrusion length of the wick is typically 0.5 to 1.2 van.

If the contact surfaces 163 touch each other, the sliding brake 13
4 fixes the core inner tube 103 or the sliding piece 131 in a frictional connection, in which case the axial holding force of the sliding brake 134 is overcome, and the core inner tube 103 and the sliding piece 131 together with the core 110 are tightened. When the body 143 or its stopper 146 contacts the falling stone ξ135 and the writing instrument 1
The movable parts of 01 move forward until they reach their rest positions.

The configuration of the sliding brake 134 can be selected arbitrarily. It may therefore also be a radially spring-elastic ring, a spring web or a radial addition, machined with slits, e.g. in the sliding hole of the shaft tip 121], 24 or in the sliding piece 131. It may be a simple knot-like portion formed.

[Brief explanation of the drawing]

The drawings show embodiments of the writing instrument of the present invention; FIG. 1 is a sectional view of the front portion of one embodiment of the writing instrument of the present invention in the rest position, and FIG. 2 is a sectional view of another embodiment in the writing position. FIG. 3 is a cross-sectional view of yet another embodiment, FIG.
5, 6, and 7 are views showing modified embodiments of important parts of the present invention, FIG. 8 is a cross-sectional view of yet another embodiment of the writing instrument of the present invention, and FIG. FIG. 10 shows a part of the writing instrument of FIG. 9 in a rest position, and FIG. 11 shows a part of the writing instrument of FIG. 9 and FIG. Diagram showing a writing instrument in a writing position, 1st
2 shows two further embodiments in writing position, FIG. 13 shows two further embodiments in rest position,
FIG. 14 is a diagram showing still another embodiment, and FIG. 15 is a diagram showing still another embodiment. DESCRIPTION OF SYMBOLS 1... Writing implement, 2... 6 Guide tube, 3... Casing, 4... Feeding device, 5... Lead, 7... Tightening sleeve, 8... Lead storage part, 21 ...Insert slider, 22.
... Core brake, 23 ... Contact addition part, 24 ... Centering cone, 25 ... Insert, 26 ... Sliding brake, 27 ... End stopper, 31 ... Shaft tip , 32... Central part, 33... Upper part, 35... Stopper, 37... Additional part, 40... Tightening body, 41...
・End face, 42...End face, 43...Brim, 44...
Web, 45--Stopper collar, 46--Press stone ξ, 4-7--Rolling element, 1-8--Notch,
49...Contact cone, 51...Rear toecap, 52...
Refill, 60... Compression spring, 61... Pressure, 62...
Through hole, 63...Contact surface, 64...t, rnestotsu・ξ, 65...Guiding part, 66...Pushing side 1, 67
... Centering portion, 68 ... Pressing edge, 73 ... Sliding conical surface, 74 ... Opening hole, 75 ... Fixing ring, 7
6...Closing part, 77...Entry slope, 78...Line side sleeve, 79...Sliding sleeve, 94...Clip, 96...Nono lance spring (compensation spring), 100...・
・Paper surface, 101...Writing instrument, 102...Shaft, 1
03... Core inner tube, 104... Tightening device, 106.
・Balance spring (compensation spring), 110... core, 111
...Subsequent core, 121...Shaft tip, 122...
・Bottom surface, 124...Slip hole, 125, 125',
125"...insert body, 131...sliding piece, ■32
... core brake, 133 ... contact piece, 134 ... sliding brake, 135 ... falling stone ξ, 140 ...
・Tightening stopper, 141...Tightening sleeve, 143・
... Line side body, 145 ... Shaft part, 1-46 ... Stotsu,
o collar, 147... Tightening rolling element, 14-8... Pressing collar, 149... Web, ■50... Suppressing body, ■51
... Repression slope, 152 ... Contact spring, 153 ... Lead storage section, 154 ... Eraser, 155 ... Retaining ring, 156 ... Cleaning needle, 157 ... Closing cap, 158 ... ...Clip, 159...Member to prevent falling, 163...Contact surface, 200...Writing surface 7-777 Fowa γ Fig. 7Q Fig. 11 National policy Fig. 12 Fig. 13 Fig. 14 Fig. 15 Procedure correction Type (method) % formula % 1. Indication of incident 1939 patent application No. 143933 2
, Name of the invention: Automatic lead-feeding instant writing instrument 3, Relationship with the case of the person making the amendment Name of patent applicant: Yotsuto Niss Stellatler 4, Sub-Agent 6, Subject of amendment

Claims (1)

[Scope of Claims] 1. A writing instrument that automatically feeds a lead and automatically follows a subsequent lead during writing, which comprises at least an axially movable guide tube having a lead brake; , a clamping device consisting of a forceps-like clamping body that opens in the radial direction and a clamping stone, and a clamping device that is arranged between the guiding tube and the clamping body and acts on both the guiding tube and the clamping body. In this case, the forceps-shaped clamping body (40) is attached to the end surface (41 ) side with the web (
44) and a strut ξ collar (45), and a compression spring (60) is disposed inside the web (44) and the strut ξ collar (45), and the tightening body (40
) and guide tube (2), and at least one contact point is provided between the compression spring (60) and the spring collar (45), which contact point thereby causes the clamping body to (40) An automatic lead-feeding writing instrument, characterized in that it is formed so that pressing forces in the axial and radial directions are transmitted to the writing instrument. 2. A press insert (61) is inserted between the compression spring (60) and the guide tube (2) and the web (44) and the strut horn ξ collar (
The automatic core feeding type 3 according to claim 1, which is arranged inside the guide tube (2) and the compression spring (60
) or a patent in which a contact extension (23) is arranged on the suppression insert (61) and a contact surface (63) is arranged on a counterpiece that cooperates with the contact extension to form a contact point. An automatic lead-feeding writing instrument according to any one of claims 1 and 2. Claims 1 to 3, wherein the contact point between the compression spring (60) or the pressing insert (61) and the stopper collar (45) is formed so as not to cause a self-locking action.
An automatic lead-feeding writing instrument as described in any one of the items. 5. The contact point is a compression spring (60) or a pressing insert (61)
) is formed as a pressing slope, and/or the collar (45) is formed as a conical pressing stone (46). Writing implements. 6. The contact point is formed as a compression spring (60) or a compression insert (61) or a compression gill (68) on the stone collar (45), in which case the compression edge is located in the rest position of the writing instrument. Automatic core feed type 7 according to claim 4 or claim 5, which is configured to be operatively connected to the conical section of the counterpart piece in the area of the contact point; Pressing stone ξ (46)
and/or the pressure ramp (66) is such that the axial spring force and gravity of the compression spring (60) and the axially freely movable part of the tightening device (4) can be applied radially through the contact point. The automatic lead-feeding writing instrument according to any one of claims 1 to 6, which is formed into a conical shape so as to be larger than the expansion slope acting on the clamping body (40). . 8. The automatic device according to any one of claims 1 to 7, wherein the contact point between the tightening body (40) and the tightening stock ξ is formed so that no self-locking action occurs. Lead-feeding writing instrument. 9. The rolling element (47) whose contact point is located in the notch (4-8) of the clamping body (40) and the clamping sleeve (7, 78)
, 79) or on the outer surface of the clamping body (4o).
9) and the contact error in the tightening sleeve (7)) (72)
An automatic lead feeding type writing instrument according to claim 8, which is formed by: 10 Core inner tube in shaft tip (31) (
2) or the axial length of the insertion slide (21) arranged in the core chamber tube (2) and/or the axial length of the insertion slide (21) and the spring (6o) or the compression insert ( The axial length of the contact attachment part (23) between the contact surface (63) at 61) is such that the core chamber tube (2) and the compression spring (60) are always in direct or indirect working connection. An automatic lead feeding type writing instrument according to any one of claims 1 to 9 as defined in the claims. 11 When the core inner tube (2) is lowered onto the paper surface (100) and during writing, the writing instrument is moved against the action of the compression spring (60) and the lead brake (22) in accordance with the wear and tear of the lead (5). (1) or its shaft tip (31), and in the case of a clamp, the radial expansion effect on the forceps-like clamping body (40) is eliminated, and at the same time, the radial expansion action of the clamping body (40) is eliminated. , and the axial tightening force of the clamping body (40) that holds the core (5) is applied to the core brake (22).
) The automatic lead-feeding type writing instrument according to any one of claims 1 to 10, wherein the axial holding force is greater than the axial holding force of (1). 12 When or after the core chamber tube (2) separates from the paper surface (100), the shaft tip (31) receives the action of the compression spring (6o) and presses the stone ξ(3).
5), in which case the clamping body (
40) is moved axially through the contact point under the action of the compression spring (60) and opened radially, the core (5) being held immobile by the axial holding force of the core brake (22). The automatic lead feeding type writing instrument according to any one of claims 1 to 11, which is conveyed from the clamping body (40) toward the tip of the shaft. 13. The clamping sleeve (7) is constructed as a sliding sleeve (79) which is axially movable within the casing (3), and the gun lance spring (96) is attached to the sliding sleeve (79).
79), which is in contact with the rear end of the sliding sleeve and which is attached to the casing (3) or to the shaft tip (31).
The automatic lead feeding type writing instrument according to any one of claims 1 to 12, which is pushed forward in the direction ξ. 14, ・The pressing force of the ζ lance spring (96) is applied to the compression spring (60) and all the axially movable parts (2, 2
1, 22, 23, 25, 61, 40, 47, 79),
The automatic lead feeding type writing instrument according to claim 12, wherein the force is slightly greater than the force in the opposite direction in the axial direction. 156. A writing instrument with automatic lead feeding during writing, comprising at least one shaft (102), a lead reservoir (153), sliding within and protruding from the tip of the writing instrument. A core indoor tube (103) equipped with a core brake (132) and a forceps-like tightening body (143)
) and a tightening device (104) that does not produce a self-locking action, consisting of a tightening stone ξ(140), and a falling stone ξ(1) for the tightening body (143).
35) and a sliding brake (134) for the inner core tube (103). 16 Falling stone ξ (135) is the tightening body (]]4)
The axial opening distance (a) of the brake is limited, and the sliding brake (
]-34) moves the core inner tube (1,03) or the sliding piece (131) immovably connected to the core inner tube into the writing instrument (10).
], ) The automatic lead-feeding type writing instrument according to claim 15, which is held immovably in the non-functional rest position. 17. An insert (125,
125') The automatic lead-feeding type writing instrument according to claim 15 or any one of claims 1 to 6, which is located at the top of claim 125'. 18 The falling stone e (135) is attached to the tightening sleeve (1
(41) or shirt) (102),
Any one of Claims 15 and 16, which cooperates with the stone ξge (146) coupled to the clamping body (143) via the clamping body shaft (145). Automatic lead-feeding writing instrument as described in section. 19 A sliding brake (134) is arranged axially immovably within the tip of the writing instrument and the insert (125, 12
5', 125") or an insert (
125, 125', 125"). The automatic lead feeding type writing instrument according to any one of claims 15 to 18, wherein the writing instrument is held in the axial direction by a sliding brake (134). Indoor pipe (103
) or on a sliding piece (131) connected to the inner tube and protruding at least partially in the radial direction from the outer circumferential surface thereof. The automatic lead-feeding writing instrument described in any one of the items above. 21. The automatic lead feeding type writing instrument according to any one of claims 15 to 20, wherein the axial braking force of the sliding brake (134) is smaller than the axial braking force of the lead brake (132). 0 22, the automatic core feeding type according to any one of claims 15 to 20, wherein the axial braking force of the sliding brake (134) is greater than the axial braking force of the core brake (132). Writing implements. 23 Tightening device (104-) or tightening sleeve (
141) is the compensation spring or ζ lance spring (106)
An automatic lead-feeding writing instrument according to any one of claims 15 to 22, which is spring-loaded by. 24. The axial pressing force of the compensation spring or ζ lance spring (106) is greater than the axial holding force of the sliding brake (134), and is also greater than the axial pressing force of the contact spring (152). An automatic lead feeding type writing instrument according to claim 23.