EP1966452A1

EP1966452A1 - Cylinder core

Info

Publication number: EP1966452A1
Application number: EP06707297A
Authority: EP
Inventors: Frank Kuhnke; Armin Geurden; Dirk Jacob
Original assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Current assignee: Huf Huelsbeck and Fuerst GmbH and Co KG
Priority date: 2005-12-20
Filing date: 2006-02-27
Publication date: 2008-09-10
Anticipated expiration: 2026-02-27
Also published as: EP1966452B1; DE102005061231B4; WO2007071293A1; US7634929B2; DE102005061231A1; US20080264123A1; CN101331286B; CN101331286A

Abstract

The invention relates to a cylinder core (1) which can be mounted in a rotatable manner in a locking device, in particular of a storage compartment or of a glove compartment of a motor vehicle, and has a head region (6), which has a key channel (2) into which a key can be introduced, and a retaining region (7), which adjoins the head region (6) and is formed with a control means (8) which, when the cylinder core (1) is rotated about its axis of rotation (11), moves an arresting means, which is arranged in the locking device, for a closing and/or opening operation. The invention provides for the cylinder core (1) to have at least two material bodies (6, 7, 8), wherein a first material body (6, 7) is configured with the head region (6), which contains a first plastic, and a second material body (7, 8) is designed with the control means (8), which contains a second plastic, the second plastic having a higher strength than the first plastic.

Description

cylinder core

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 holding area adjoining the head area, 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.

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 has higher strength than the first plastic. 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, high forces, torques etc. act on the control means, the control means is designed with the second plastic. 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 solidification of the first plastic, which forms the first material body, 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, positively and / or cohesively connected to each other rotationally fixed. An exclusive positive connection between the first and the second material body is also possible. 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 galvansizable.

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. Locking grooves can be used to guide blocking members (tumblers), which causes a blocking position of the cylinder core, that is to say that the cylinder core is locked by means of 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 Ans ^' chlagelerrientes at least one further web extends, the free end has a distance from the outer edge region of the stop element.

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 shows a purely schematic representation of a cylinder core which has a first and a second material body,

FIG. 2 shows a further alternative of a cylinder core according to FIG. 1,

FIG. 3 shows a further possible embodiment of the cylinder core according to FIG. 1,

Figure 4 shows an alternative embodiment of the cylinder core, the locking grooves and

Having blocking members,

FIG. 5 shows a sectional view along the section line V - V according to FIG. 4 and FIG

FIG. 6 shows a sectional view along the section line VI-VI according to FIG. 4.

In Figure 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 in FIGS. 2 to 6-the second plastic has a higher strength than the first plastic.

In a further embodiment of the invention, FIG. 2 shows 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, as in FIG. 2, the head region 6 and the holding region 7 are formed by the first material body 6, 7. The control means 8 is connected with 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 Figure 1 to Figure 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 produced here by a 2K injection molding process.

According to Figure 4 to Figure 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 is inserted into a keyway 2, which is shown by way of example in FIG. 5, of the cylinder core 1, wherein blocking elements 3 arranged in the cylinder core 1 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 exemplary embodiments according to FIGS. 1 to 3, the first material body 6 contains a first plastic and the second material body 7, 8 contains 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 Figure 5, the head portion 6 is double-walled, having 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 can be seen in particular from Figure 6, 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. Subject list

cylinder core

keyway

blocking member

locking groove

metal layer

head area

holding area

control means

base element

stop element

cavity

axis of rotation

Claims

Patent claims

1. Cylinder core (1) rotatably mounted in a closure device, in particular a storage compartment or a glove compartment of a motor vehicle can be arranged, with a head portion (6) having a keyway (2) into which a key is inserted, and a The holding area (7) adjoining the head area (6) has a control means (8) which, upon rotation of the cylinder core (1) about its axis of rotation (11), moves a locking means arranged in the closing device for a closing and / or opening operation , characterized in that the cylinder core (1) at least two material body (6,7,8), wherein a first material body (6,7) is designed with the head portion (6) containing a first plastic, and a second material body (7,8) is formed with the control means (8) containing a second plastic, wherein the second plastic has a higher strength than the first plastic.

2. cylinder core (1) according to claim 1, characterized in that the first material body (6,7) with the head portion (6) and the holding portion (7) is formed, which are integrally connected in one piece with each other material.

3. Cylinder core (1) according to claim 1, characterized in that the second material body (7,8) with the Haltebereich- (7) and the control means (8) is executed, which are integrally connected to one another in the same material.

4. Cylinder core (1) according to any one of the preceding claims, characterized in that there is a pure positive connection between the first (6,7) and the second material body (7,8).

5. Cylinder core (1) according to one of the preceding claims, characterized in that the control means (8) has a control cam which is in particular of the same material with a base member (8a) surrounding the free end of the holding element (7).

6. cylinder core (1) according to any one of the preceding claims, characterized in that the first material body (7,8) executed in color and / or electroplated and / or a color layer on the first material body (7,8) can be applied.

7. Cylinder (1) according to one of the preceding 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 glass fibers and / or carbon fibers and / or Aramidfasem ,

8. Cylinder core (1) according to one of the preceding claims, characterized in that the first material body (7,8) has a metal layer (5).

9. Cylinder core (1) according to claim 8, characterized in that the metal layer (5) can be applied electrolytically, by vapor deposition, by a CVD method, by a PVD method or by dip coating.

10. Cylinder core (1) according to one of the preceding claims, characterized in that the cylinder core (1), in particular the first (6,7) and the second material body (7,8) is produced by a 2K injection molding.

11. Cylinder core (1) according to one of the preceding claims, characterized in that the first plastic is conductive.

12. Cylinder core (1) according to one of the preceding claims, characterized in that the cylinder core (1) can be arranged in a housing of a lock cylinder, wherein the cylinder core (1) has at least one locking member (3), which in its blocking position, a movement, prevents in particular a rotation of the cylinder core (1) relative to the housing of the lock cylinder and in its release position allows movement, in particular rotation of the cylinder core (1) relative to the housing of the lock cylinder with the key, wherein the locking member (3) one on the holding portion (7 ) Is formed associated Sperrnut (4).

13. Cylinder core (1) according to one of the preceding claims, characterized in that the holding region (7) is formed with a stop element (9) which faces the head region (6).

14. Cylinder core (T) according to one of the preceding claims; characterized in that the head region (6) is double-walled, which has an outer (6a) and an inner wall (6b).

15. Cylinder (1) according to claim 14, characterized in that between the outer (6a) and the inner wall (6b) at least one open cavity (10) is formed, which is filled by the holding area (7).

16 cylinder core (1) according to one of the preceding claims, characterized in that the outer (6a) wall with the inner wall (6b) by at least one web (6c) is connected.

17. Cylinder core (1) according to one of the preceding claims, characterized in that starting from the inner wall (6b) in the direction of the stop element (9) at least one further web (6d) extends, the free end of a distance to the outer edge region of Has stop element (9).