EP1966452B1 - Cylinder core - Google Patents

Description

The invention relates to a cylinder core, which is rotatably mounted in a closure device, in particular a storage compartment or a glove compartment of a motor vehicle, with a head portion having a key channel into which a key is inserted, and having a head portion adjoining holding portion, which is formed with a control means which moves upon rotation of the cylinder core about its axis of rotation arranged in the closure means locking means for a closing and / or opening operation.

From the prior art, a variety of designs of cylinder cores is known. Here, the cylinder cores have different material properties in order to meet the necessary material requirements, in particular in the respective fields of application. For example, the cylinder core is made of a material having a higher strength, so that any high acting on the cylinder core forces, torques, etc. do not lead to destruction.

Often it is necessary to additionally adapt the cylinder core to the environment, in particular color, which can be cost-intensive with high-strength materials. Furthermore, it has disadvantageously been found that undesirable noises can arise within the bearing of the closure device in which the cylinder core is arranged during the closing and opening process, especially when using high-strength plastics.

The document WO83 / 00178 A1 discloses a cylinder core having two material bodies.

It is an object of the present invention to provide a cylinder core for a closure device in which the disadvantages mentioned are avoided, in particular a cylinder core is provided which is simple in design and can be produced without considerable effort and can reliably fulfill its function within the lock cylinder.

To solve this problem, a cylinder core with the features of claim 1 is proposed. In the dependent claims preferred developments are carried out.

For this purpose, the invention provides that the cylinder core has at least two material body, wherein a first material body is designed with the head portion containing a first plastic, and a second material body is formed with the control means which includes a second plastic, wherein the second plastic a higher strength than the first plastic, wherein the first and the second material body form a one-piece mounting unit. In this case, the head area is the area visible on the closure device, into which the key is inserted into the keyway. The diameter of the head area is usually larger than the diameter of the holding area, which is located below the head area. Preferably, the holding portion, which is inserted within a bearing of the closure device, is formed substantially cylindrical. The holding area also serves as a guide element within the bearing, which ensures reliable rotation of the cylinder core. Since in particular act on the control means high forces, torques, etc., is the control means with the second plastic executed. The head area, however, does not have to meet such strength properties. The holding area may be made of either the first or the second plastic depending on the requirements. That means the first one Material body can be formed with the head portion and the holding portion, which are integrally connected to one another in one piece material, or that the second material body can be designed with the holding portion and the control means, which are integrally connected to one another in the same material. By carrying out the cylinder core according to the invention with the mentioned material bodies, the required material properties can be effectively set, at the same time reducing material costs in terms of the less required second plastic material.

Advantageously, the cylinder core consists of an injection-molded part made of plastic, wherein in one possible embodiment the first material body is molded onto the second material body, whereby a one-piece connection of the head region, the holding region and the control means is achieved.

In a possible alternative embodiment, the first material body may have a coating which consists of a metal. It is also conceivable to provide the first material body with a layer which has a suitably adapted color, in particular to the environment. Alternatively, color additives may be embedded in the first plastic of the first material body, which may also be referred to as color pigments.

In a preferred embodiment of the invention, the cylinder core is produced by a 2K injection molding process. In this two-component process, after the first plastic which forms the first material body solidifies, the cavity is enlarged in the tool. Subsequently, the second plastic is injection-molded with a second injection unit. Advantageously, thus two material body ect. Different material properties in their strength, electrical conductivity. have, cohesively and in particular form-fitting rotatably connected to each other. The first and the second material body thus form a one-piece assembly unit, whereby a compact cylinder core is achieved, which can be arranged without considerable effort in the closure device and the cylinder core the having required material properties at the same time on the head area, holding area and control means.

It is particularly advantageous that the head area is provided with a metal layer. Conveniently, the first plastic has corresponding material properties that allow the simplest possible metal coating. In this case, it may be advantageous for the holding region and the control means to consist of the second plastic having a higher strength. This is due to the fact that acting on the holding area and in particular on the control means usually greater forces, such as tensile, compressive and / or shear forces acting on the head area.

In a possible alternative of the invention, the first material body, in particular the first plastic, can be electroplated. It is advisable to carry out the first plastic as electrically conductive in order to achieve a satisfactory galvanic application of the desired metallic layer in sufficient strength. During the galvanic process, an electrolytic coating of the electrically conductive first material body takes place, wherein the second material body consists of a non-electroplatable, in particular non-electrically conductive plastic, so that there is no metal coating.

In a preferred embodiment of the invention, the first plastic comprises a material of ABS (acrylonitrile-butadiene-styrene copolymer) which preferably comprises the three monomer types acrylonitrile, butadiene and styrene. The proportions can vary from 15-35% acrylonitrile, 5-30% butadiene and 40-60% styrene. In addition to its physical properties as hard, scratch-resistant, impact-resistant and chemically resistant, ABS is also electroplated.

In a possible embodiment of the invention, the second material body may comprise the plastic PC (polycarbonate), which does not have an electrically conductive and high strength, in particular high impact strength. Of course, alternative plastics for the second material body can be used. Advantageously, embedded within the second plastic glass fibers and / or carbon fibers and / or aramid fibers.

In another possible embodiment of the cylinder core, a filled conductive plastic may be used as the electrically conductive first plastic, in which a conductive filler such as carbon black or carbon black, carbon fiber or metal powder is added to a thermosetting or thermoplastic resin. Alternatively, a self-conducting plastic may be used as the first plastic, based on polymers that have been made electrically conductive by oxidation, reduction or protonation (doping).

The electrical conductivity of the filled conductive first plastic depends on the mutual contacts between the conductive filler particles. It has been found that a well-dispersed filler of about 10 to 50 weight percent is required to produce composites with good conductivity. On the other hand, conductive plastics can be made from organic polymers containing long conjugated chains formed by double bonds and heteroatoms. For example, the polymers can be made conductive by modifying the π and π p electron systems in their double bonds and heteroatoms by adding to the polymer certain dopants or dopants which serve as electron receptors or electron donors in the polymer. As a result, electron holes or additional electrons are formed in the polymer chain, whereby the electric current can run along the conjugated chain. An advantage of the self-conductive plastic is the ease of varying its conductivity as a function of the amount of dopant, that is, the doping level, especially within low conductivity ranges. On the other hand, achieving low conductivities with filled conductive plastics is easy to achieve.

In addition to an electrolytic, galvanic deposition of the desired metallic layer, alternative coating methods are alternatively possible. For example, the metal layer can be applied by vapor deposition, by a CVD method, by a PVD method or by dip coating on the first material body. In these alternatively mentioned coating methods, it is advantageous that the first plastic and the second plastic have corresponding properties, whereby a simple and reliable coating, in particular of the head region, can take place. Here is It is not absolutely necessary that the first plastic of the head area is electrically conductive.

In a preferred embodiment of the invention, it has proven to be advantageous for the control means to have a control cam, which is in particular connected to the same material as a base element. The control cam may, for example, be arranged on the free side of the cylinder core opposite the head region. During the rotation of the cylinder core about its axis, the control means is simultaneously moved, which in turn moves the locking means arranged in the closure device for a closing and / or opening operation. Also, the control means may be formed as a kind of groove. Furthermore, various positions of the control means on the holding area are conceivable, on which the control means can be arranged. Depending on the particular construction of the closure device, the control means can also be positioned on the mantle region of the holding region, between the free end of the holding region and the head region. Furthermore, several control means are alternatively conceivable.

Another improvement measure provides that the cylinder core can be arranged in a housing of a lock cylinder, which is a possible embodiment of the closure device, wherein the cylinder core has at least one locking member which, in its blocking position, a movement, in particular a rotation of the cylinder core relative to the housing of the Locking cylinder prevents and in its release position, a movement, in particular a rotation of the cylinder core relative to the housing of the lock cylinder with the key permits, wherein the locking member is associated with a formed on the holding portion locking groove. Preferably, the holding portion is designed with a plurality of ^- spaced locking grooves, which are formed as openings. By blocking grooves blocking elements (tumblers) can be performed, whereby a locking position of the cylinder core is effected, that is, the cylinder core is locked by tumblers with the cylinder housing.

Advantageously, the holding area is formed with a stop element, which faces the head area. During the rotation of the cylinder core from its blocking position to its release position and vice versa, the stop element hits a arranged on the lock cylinder housing stop surface, whereby a further rotation of the cylinder is prevented.

Furthermore, it can be provided according to the invention that the head area is double-walled, which has an outer and an inner wall. In this case, at least one open cavity can form between the outer wall and the inner wall, into which the holding area extends. Preferably, a plurality of cavities form, which form a kind of chamber system. The cavities are preferably designed to be open in the direction of the holding region, so that the holding region can reliably fill the cavities. This constructive design of the cylinder core achieves a reliable connection between the head region and the holding region. In this embodiment of the invention, only the head region is formed by the first material body. The holding region and the control means constitute the second material body. Since the holding region projects into the cavities of the head region, material reinforcement of the head region can be achieved.

The outer and inner walls are preferably connected by at least one web. Here, the inner wall comprises the key channel, wherein the inner wall of the shape of the keyway can be adjusted. In a possible alternative of the invention, the inner wall is circumferential, designed in the form of a rectangle. Starting from the inner wall, one or more webs extend to the outer wall. The cavities of the head region are thus formed by the outer and the inner wall and the webs.

It is also conceivable that, starting from the inner wall in the direction of the stop element at least one further web extends, the free end has a distance from the outer edge region of the stop element.

Figur 1

eine rein schematische Darstellung eines Zylinderkerns, der einen ersten und einen zweiten Materialkörper aufweist,

Figur 2

eine weitere Alternative eines Zylinderkerns gemäß Figur 1,

Figur 3

eine weitere mögliche Ausführungsform des Zylinderkerns gemäß Figur 1,

Figur 4

eine alternative Ausgestaltung des Zylinderkerns, der Sperrnuten und Sperrorgane aufweist,

Figur 5

eine Schnittansicht entlang der Schnittlinie V - V gemäß Figur 4 und

Figur 6

eine Schnittansicht entlang der Schnittlinie VI - VI gemäß Figur 4.

Further advantages, features and details of the invention will become apparent from the dependent claims, the following description in which several embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and the description may each be essential to the invention individually or in any desired combination. Show it:

FIG. 1

a purely schematic representation of a cylinder core having a first and a second material body,

FIG. 2

another alternative of a cylinder core according to FIG. 1 .

FIG. 3

another possible embodiment of the cylinder core according to FIG. 1 .

FIG. 4

an alternative embodiment of the cylinder core, the locking grooves and locking members,

FIG. 5

a sectional view taken along the section line V - V according to FIG. 4 and

FIG. 6

a sectional view along the section line VI - VI according to FIG. 4 ,

• In einer weiteren Ausführungsform der Erfindung zeigt Figur 2 einen Zylinderkern 1, der aus einem ersten Materialkörper 6,7 und einem zweiten Materialkörper 8 besteht. Hierbei ist der erste Materialkörper 6,7 mit dem Kopfbereich 6 und dem Haltebereich 7 ausgebildet, die materialeinheitlich einstückig miteinander verbunden sind. Das Steuermittel 8 stellt den zweiten Materialkörper 8 dar.

In FIG. 1 a cylinder core 1 is shown, which is rotatably mounted in a closure device of a motor vehicle can be arranged. The said closure device can be located, for example, in a storage compartment or a glove compartment of a motor vehicle. The cylinder core 1 has a head region 6 and a holding region 7 arranged below the head region 6, which has a control means 8 at its free end. In this case, the head region 6 consists of a first material body 6 and the holding region 7 with the control means 8 of a second material body. According to the invention, the first material body 6 contains a first plastic and the second material body 7.8 a second plastic, wherein according to FIG. 1 - as well as in FIG. 2 to FIG. 6 - The second plastic has a higher strength than the first plastic:

• In a further embodiment of the invention shows FIG. 2 a cylinder core 1, which consists of a first material body 6,7 and a second material body 8. In this case, the first material body 6, 7 is formed with the head region 6 and the holding region 7, which are integrally connected to each other in the same material. The control means 8 represents the second material body 8.

In FIG. 3 is - as well as in FIG. 2 - The head portion 6 and the holding portion 7 formed by the first material body 6, 7. The control means 8 is connected in the same material as a base element 8a and constitutes the second material body. In this case, the base element 8a comprises the free end of the holding region 7.

The first plastic of the first material body according to FIG. 1 to FIG. 3 is an ABS plastic, which is additionally provided with color pigments, wherein the second plastic of the second material body contains a PC plastic, which has a higher strength than the first plastic. The cylinder cores 1 are hereby produced by a 2K injection molding process.

According to FIG. 4 to FIG. 6 another possible embodiment of the cylinder core 1 is shown, which can be arranged in a housing, not shown, of a lock cylinder. The cylinder core 1 shown is provided in the present embodiment for a glove compartment of a motor vehicle. As the illustrations show, the cylinder core 1 is rotatable about an axis of rotation 11 within the lock cylinder, whereby the cylinder core 1 can be brought from a locked position into a release position or vice versa. For this purpose, a key in a key channel 2, the exemplary in FIG. 5 is shown, introduced the cylinder core 1, wherein arranged in the cylinder core 1 blocking elements 3 are brought from their blocking position into a release position. These blocking elements 3 are also known as tumblers in the prior art, which are platelets made of metal in the illustrated embodiment. Each blocking member 3 is associated with a locking groove 4, which is formed on the cylinder core 1 as a kind of slot-shaped opening. In the illustrated embodiment of the cylinder core 1, the locking members 3 protrude into their locking position by the respective locking grooves 4 and are in contact with the lock cylinder housing, not shown, whereby rotation of the cylinder core 1 about its axis 11 is prevented. If the correct key inserted in the keyway 2, the locking members 3 are within the cylinder core 1, without touching the housing of the lock cylinder, whereby the cylinder core 1 can be rotated about its axis 11.

The cylinder core 1 has a first 6 and a second material body 7, 8, wherein the head region 6 through the first material body 6 and the holding portion 7 with the Control means 8 are formed together by the second material body 7,8. As in the embodiments according to the FIGS. 1 to 3 the first material body 6 contains a first plastic and the second material body 7, 8 a second plastic, which has a higher strength than the first plastic. The head area 6 consists of an ABS plastic and the holding area 7 arranged below the head area 6 is made of a PC plastic. The head portion 6 and the holding portion 7 are integrally connected to each other according to the invention, which takes place in the present embodiment by a 2K injection molding. The head region 6 is formed with a metal layer 5 applied by a galvanic process. The electroplating takes place here by an electrochemical deposition of a metal on the electrically conductive ABS plastic by means of an electrolyte. The present metal layer 5 is a layer of chromium. The applied chromium layer 5 has a rather thin thickness, which is below 20 microns. Of course, other metals than layer 5 can be used, such as silver, gold or titanium.

The holding portion 7 has at its end remote from the head portion 6 free end to the control means 8, which has a distance from the axis of rotation 11 and is designed as a control cam. Furthermore, the holding region 7 is formed with a stop element 9, which lies flush with the head region 6.

According to FIG. 5 the head region 6 is double-walled, which has an outer 6a and an inner wall 6b. The outer wall 6a is directly connected via webs 6c to the inner wall 6b. The inner wall 6b has in the present embodiment, a circumferential, rectangular shape. At the webs 6c opposite side of the inner wall 6b further webs 6d extend in the direction of the stop element 9. Furthermore, the locking members 3 are shown, which are in their locked position. Between the outer 6a and the inner wall 6b are cavities 10 in which the holding portion 7 extends. As in particular from FIG. 6 can be seen, the cavities 10 are groove-shaped, which are completely filled by the holding portion 7, whereby the strength of the head portion 6 can be amplified.

LIST OF REFERENCE NUMBERS

1

cylinder core

2

keyway

3

blocking member

4

locking groove

5

metal layer

6

head area

7

holding area

8th

control means

8a

base element

9

stop element

10

cavity

11

axis of rotation

Claims (16)

1. Cylinder core (1) that can be arranged to rotate in a closure device particularly in center consul compartment or a glass compartment of a vehicle with a head area (6) which has key channel (2) in which a key can be introduced and a holding area (7) connected to the head area (6) which has a control device (8) which moves a blocking device arranged in the closure device when the cylinder core (1) is rotated around its axes of rotation (11) for a closing and/or an opening process wherein the cylinder core (1) has at least two material elements (6, 7, 8)
   characterized in that
   a first material element (6, 7) is designed with a head area (6) that contains a first plastic and second material element (7, 8) is designed with the control device (8) that contains a second plastic, wherein the second plastic having a higher strength than the first plastic, wherein the first (6, 7) and the second material elements (7, 8) design one mountain unit.
2. Cylinder core (1) according to claim 1
   characterized in that
   the first material element (7, 8) is designed with the head area (6) and the holding area (7) which are connected to each other in one material unit.
3. Cylinder core (1) according to claim 1
   characterized in that
   the second material element (7, 8) is designed with a holding area (7) and the control device (8) which are connected to each other in one material unit.
4. Cylinder core (1) according to one of the proceeding claims
   characterized in that
   the control device (8) has a control cam that is connected in particular to a base element (8a) in a material unit which encloses the free end of the holding area (7).
5. Cylinder core (1) according to one of the proceeding claims
   characterized in that
   the first material element (6, 7) is designed so that it can be colored and/or galvanized and/or that a color layer can be applied to the first material element (6, 7).
6. Cylinder core (1) according to one of the proceeding claims
   characterized in that
   the first plastic is a material of ABS and/or the second plastic is a material of PC and/or the second plastic has glass fibers, carbon fibers and /or aramid fibers.
7. Cylinder core (1) according to one of the proceeding claims
   characterized in that
   a first material element (6, 7) has a material layer (5).
8. Cylinder core (1) according to claim 7
   characterized in that
   the material layer (5) can be applied electrolytically by evaporation, by a CVD process, by a PVD process or by dip coating.
9. Cylinder core (1) according to one of the proceeding claims
   characterized in that
   the cylinder core (1) especially the first (6, 7) and/or the second material element (7, 8) is produced by a 2C injection molding method.
10. Cylinder core (1) according to one of the proceeding claims
    characterized in that
    the first plastic is conducting.
11. Cylinder core (1) according to one of the proceeding claims
    characterized in that
    the cylinder core (1) can be arranged in a housing of a closure cylinder, whereby the cylinder core (1) has at least one blocking device (3) which in its blocking position prevents a movement, particularly a rotation of the cylinder core (1) with respect to the housing of the closure cylinder and in its release position permits a movement particularly a rotation of the cylinder core (1) with respect to the housing of the closure cylinder with a key, whereby the blocking device (3) is assigned to a blocking groove (4) made on the holding area (7).
12. Cylinder core (1) according to one of the proceeding claims
    characterized in that
    the holding area (7) is designed with a stop element (9) that faces the head area (6).
13. Cylinder core (1) according to one of the proceeding claims
    characterized in that
    the head area (6) is designed with double walls having an outer (6a) and inner wall (6b).
14. Cylinder core (1) according to claim 13
    characterized in that
    at least one open cavity (10) filled by the holding area (7) is formed between the outer (6a) and the inner wall (6b).
15. Cylinder core (1) according to one of the proceeding claims
    characterized in that
    the outer wall (6a) is connected to the inner wall (6b) by at least one connector (6c).
16. Cylinder core (1) according to one of the proceeding claims
    characterized in that
    starting from the inner wall (6b) in the direction of the stop element (9) at least one additional connector (6d) extends whose free end has a spacing from the outer edge area of the stop element (9).

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