Anti-theft device for a slidable built-in apparatus.

p0001The invention relates to an antitheft a sunk to be arranged built-in device with the features of the preamble of claim 1.

p0002An anti-theft device with these features is known (DE-OS 34 43 650). Is this only once the installation device by means of suitable, dissolved his support means ausrückender tools, so someone can steal it relatively easily regardless of the tripped alarm the absence of further assurance. Based on this previous review was proposed (DE-OS 35 45 233), already trigger the alarm when removing from frame parts of a built-in device, if z. B. trying to illegitimately gain access to the mechanical support means hidden under the covering frame parts to this to to solve. It is also known to cause alarm already the unauthorized opening or removal of a mobile for its camouflage against a built-in device panel or cover (DE Offenlegungsschriften 35 28 016 35 37 371). required relative movement of two parts, as opposed to the generic arrangement shifted from built-in device itself as a moving part away to other mobile (cultivation) parts towards - In these latter antitheft devices so was the inevitable for raising the alarm - for the purpose of switch actuation or loop interruption. Although this action removes the one hand the concerns expressed by the above criticism disadvantage, but can on the other hand also act to protect the built-in device only by removing the cover and bezel. Is the so-triggered alarm deleted - according to law after 30 seconds - so the built-in device is secured only by the respective mechanical supporting means. But these are also detachable from the front of the chassis unit forth accessible and appropriate simple tools generally.

p0003Another, purely mechanical antitheft devices for installation of the type in question is known (DE-OS 36 18 681), wherein the mounting device is determined by a fixed to its back, tensioned traction element in its bay. The armored tension member is accessible only with the greatest effort unauthorized. On the other hand extensive expansion work is required compared to conventional mounting kits before performing repairs at the mounting device, since among other each time a part of the tension member locking screw must be drilled. Especially for the factory (series) installation of the latter antitheft proposes a guide and armor of the tension element through a tube.

p0004Object of the invention sit improving a generic anti-theft - in which by a relative movement between the mounting device or its mounting means and the drive bay alarm is triggered - and issuance of simple for authorized persons installation and removal of the built-in device from the insertion port of the drive bay ago.

p0005This object is achieved with the characterizing features of claim 1 and of the independent claim 2 according to the invention.

p0006For since the built-in device in his bay - on the basis of so-called "quick-out" -Einbausätze - always, that is also movable in the secured state, within a limited range, with a likewise movable safety stop ensures the locking limit of this range, is - A transfer of the holding means in the inaccessible in secured installation device bay allows - due to the mobility of the conditional assurance attack made possible by delegation simple installation and removal of the built-in appliance.

p0007The required cable connections are not a problem, because they must anyway be long enough to allow complete withdrawal of the built-in device from the drive bay, or to allow the complete wiring before inserting the built-in appliance.

p0008The standard sliding guides in the bay or on the built-in device can be retained unchanged. Requires only be one or more points of attack on the built-in device for this exciting in its installation position restoring force. This is especially usefully provided if you want to dispense with the usual supporting-detents, etc., to secure the built-in appliance in its installation position even with uneven road surfaces and vehicle accelerations. According to the teaching of the independent claim, which does not provide for restoring force - this is to achieve the object also not mandatory - but should be provided in addition to the movable securing stop the usual supporting-detents. However, always takes the safety stop alone the actual mechanical antitheft. However, an elimination of the usual supporting-detents side carrier device has the advantage that no opening at the front of the chassis unit - and not this about masking aperture - need to be provided more. The dependent claims disclose their characterizing features, advantageous refinements of the inventive anti-theft device.

p0009The attainable by the movement of the securing stop in its securing position of theft protection for the built-in device, regardless of its engagement location on a tension member or the housing of the mounting device itself is very large, because again no possibility of unauthorized persons is attacking some of the built-in device-front about it. Appropriately, the conditional mobility of security attack is linked to a key usage, a mechanical or a remotely controlled power-operated movement is possible.

p0010In connection with the securing of fernentriegelbaren bonnets of motor vehicles directly mechanically acting (DE-OS 23 14 957) are or power-operated remote-controlled Zugelementsicherungen (DE-OS 21 16 448) are already known per se, which can prevent the unauthorized movement of the hood Fernentriegelungsseilzuges , An indication of an antitheft device of an installation can the said documents are not removed.

p0011Embodiments of the anti-theft device according to the invention are schematically shown in the drawing and will be described in more detail below.

p0012Show it:<ul><li>Figure 1 shows an overall view of a built-in device with two variants of the anti-theft device;</li><li>2 shows a tension member as a mechanical holding means, which is blocked with a safety stop, as well as an associated electrical anti-theft contact position in three variants 2a, 2b and 2c.</li></ul>

p0013A built-in unit 1, z. B. a radio / cassette drive combination is shown in a cutaway bay 2 of a motor vehicle dashboard 3 in its installed position. The built-in unit 1 is freely accessible from its facing into the passenger compartment front 4 forth. At its rear side 5 an insertion guide 6 is arranged, the withdrawing as a point of the chassis unit 1 into the bay 3 and into its installation position in restoring force is provided. This restoring force is transmitted through a designed as a rope tensioning element 7 to the built-in device-back. 5 The cable 7 is guided over most of its length in a body-fixed tube eighth The above-mentioned resetting force is applied by a helical compression spring 9 in the cable 7, which is - An end fitting 10 on the cable 7 - And is supported via a constriction 11 on the tube 8 via a respective disc 12th

p0014The tongue 9 and the cable 7 are so long that the chassis unit 1 along with its electrical connections 13 and antenna cable 14 - as is usual also located on the back 5 - completely out of the drive bay 2 without degradation of the fixed on the insertion guide 6 with the can be pulled out modular device 1 associated retaining cable 7, before the spring is shortened to its block length.

p0015The security in the narrow sense is shown in two versions, the first of which is housed in a fixed to the tube 8 housing 21 in the bay - this variant is in Figure 2a) - shown in more detail 2c) - and the rope 7 comes into effect, the second as seen in figure 1, the modular device 1 itself comes into effect. This second variant of the anti-theft device comprises a mechanical safety stop 15 and an electrical antitheft Contact 16th These are both located in bay 2 and correspond both with an elongated hole 17 in the mounting unit 1. The safety stop 15 is conditionally movable, which is indicated by a key symbol 18th This is a mechanical movement of the safety stop 15 by means of a locking cylinder -. Eg the steering lock - or even for a power-operated mobility by means of a control element 18 ', in turn, by a key-operated switch - eg the ignition switch or a central control switch. - is remotely controllable. Such arrangements are known adequately for themselves and therefore need not be described in detail. The safety stop 15 illustrated in its release position can therefore be spent by key into its securing position in which it engages in the slot 17th The anti-theft device according to the invention acts now as meaning that the chassis unit 1 even at befindlichem in securing position securing stop 15 can be a little out of the drive bay 2 pull - against the restoring force of the spring 9 and at most over the length of the slot 17 - but that during this movement the antitheft contact 16 operated - here: closed - will and an alarm system triggers alarm 19. The alarm system 19 is simultaneously armed with the introduction of the safety stopper 15 in its securing position by a plus-switch 20 is closed. The advantages of this arrangement were already geschildet introduction. Only on the right side of the built-in device 1 is shown schematically a locking nose-mounting construction 31 is shown, which is often used in a similar way on both sides and pass through an opening 4.1 is movable and disengageable by means of a tool. If such a holder further used, when installing the second variant of the anti-theft device described above, the restoring force and / or the tether can be omitted. After unauthorized disengagement of the locking lug (s) can be withdrawn only by the start of the slot end at securing stop here, the built-in device. Move alarm is triggered but already.

p0016The same effect as described previously achieved with the introduction mentioned first variant of the anti-theft device, schematically, a key symbol is assigned 18 also to indicate the same activities as in the second variant described above. Especially here a Bowden cable is connected to the 18˝ securing stop 30 to its reciprocating motion; with the indicated key 18 a locking cylinder is then actuated, is at which the ground course 18˝ hitched. The safety stop 30 may be spring biased in its securing position. The housing 21 is mounted in a region of the tube 8 in which there is a limited by two fixed to the cable 7 nipple 22 cable section in the illustrated mounting position of the mounting unit 1. In the latter body is 23 - lined with low axial play loosely - in the form of balls. The nipple 22 and body 23 should be included with movements of the rope 7 within the tube 8 and the housing 21st The content of the housing 21 is shown in Figure 2a) to 2c), wherein the housing 21 itself indicated only dashed in 2a) and omitted in 2b) and 2c). The cable 7 is shown only as a centerline. In the housing 21 a resilient pawl 24 is pivotally mounted against the force of a leaf spring 25th The pawl 24 has a fork tip 26 25 23 both sides of the cable 7 is incident under the force of the leaf spring between the two bodies. On the pivot axis of the pawl 24, an eccentric 27 is also arranged, which is in operative connection with an electrical anti-theft contact 28th Finally, the latch 24 nor a safety arm 29 which interacts with a safety stop 30th Functionally, the safety stop 30 of the first variant and the safety stop 15 of the second variant is equivalent, as well as the anti-theft device contacts 28 (1st variant) and 16 (2nd variant).

p0017In Figur2a), an arrow E is also registered, which indicates the direction of movement of the cable 7, the nipple 22 and the body 23 during installation or release the mounting device. Here, neither the anti-theft device contact 28 is closed is still running the safety arm 29 of the pawl 24 on the securing stop 30th

p0018In Figure 2b), an arrow A is added, indicating a reversal of the movement direction of E, therefore (unauthorized) expansion of the built-in appliance. The pawl 24 is then pivoted by the jammed body 23 on its top 26 with its securing arm 29 against the securing stop 30th Further withdrawal of the built-in appliance 1 is then mechanically prevented. Earlier 28 alarms if closed by the eccentric 27 of the electrical antitheft contact.

p00192a) and 2b) is the securing stop 30 in locked position.

p0020In Figure 2c) is the securing stop 30 in the release position. Then he can, as already mentioned, may be moved only by means of the key, wherein the alarm is turned off. Then can be, as shown, pull the mounting device against the force of the spring 9, together with the rope 7, the nipples 22 and the bodies 23rd Although the anti-theft device contact 28 is also in this case mechanically operated, an alarm does not occur, however. Exactly analogous functioning the first variant of the anti-theft device; at the position of the safety stopper 15 and the switch 20 shown in Figure 1, the modular device 1 can be removed relatively easily from the drive bay. The insertion guide 6 allows to expand the built-in appliance 1 simple release of the cable 7 from the rear. 5

p0021From the foregoing description of the antitheft device, it is clear that both variants are volltständig for themselves and independently from each other may be used. But there are also mixed forms or simultaneous use of both variants are possible. A limitation on the scope must not be seen in the embodiments. Of course, can be described and claimed antitheft also in automotive uses foreign advantageously utilized, eg for devices of home stereos. This fact is supported by only "Insbesondere-" stress in primary and secondary claim bill.