Abstract:
A control device has a plurality of possible attachment places for receiving attachment elements at least one of the attachment places being formed as a blocking attachment place which prevents receiving of an attachment element.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     The present invention relates to a control device with several possible attachment places for receiving of attachment means.  
         [0002]     The customers catalog “Auslöseeinheit Rückhalte System” (ARS), Arbeitskreis ARS, Sep. 17, 1993 discloses a control device with attachment places. The sensor system of such a control device has the function of monitoring the travel-dynamic condition of a vehicle and adjust to the corresponding installation location with respect to the vehicle axes. A false installation position leads to faulty measurements and to a malfunction of the safety operation. In order to guarantee a correct installation position, the so-called customer catalog provides a control device with three asymmetrically arranged attachment places. An installation platform with three attachment pins which correspond to the attachment places is mounted as a counter piece to the control device in the motor space of a vehicle. Due to the asymmetrical arrangement of the attachment places and pins, an accurate installation position is guaranteed.  
         [0003]     The installation location of the control device is typically dependent on a vehicle, so that the control devices are determined on the basis of the corresponding vehicle type. The installation of a control device which is wrong for the vehicle leads to error functions in a safety relevant region and must be avoided. Due to the asymmetrical arrangement of the attachment places in accordance with the customer catalog the installation of a control device on another vehicle type is not prevented.  
       SUMMARY OF THE INVENTION  
       [0004]     Accordingly, it is an object of the present invention to provide a control device with blockable attachment places, which avoids the disadvantages of the prior art.  
         [0005]     In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a control device, comprising a plurality of possible mounting places for receiving mounting means, at least one of said mounting places being formed as a blocking mounting place which prevents receiving of a mounting means.  
         [0006]     When the control device is designed in accordance with the present invention, it has the advantage that the control device has a plurality of possible attachment places and by blocking at least one attachment place it prevents the installation of the control device in a vehicle of a type which is wrong for it.  
         [0007]     It is especially advantageous, in accordance with another embodiment of the present invention, when at least one blocking attachment place is formed without a recess. Therefore, it can be formed during the manufacture of housing of the control device in a vehicle-typical manner.  
         [0008]     In accordance with a further preferable embodiment of the present invention, at least one possible attachment place is blocked with an introduced device. This makes possible an advantageous uniform manufacture of the housing of the control device. The vehicle-typical blocking of an attachment place is performed by insertion of a corresponding device in a later manufacturing step.  
         [0009]     In accordance with a further embodiment of the present invention, the device for blocking a possible attachment place is formed as a clamp. In this way, an attachment place is efficiently blocked with simple means.  
         [0010]     In accordance with a further preferable embodiment of the present invention, a control device is fixed over the position of at least one blocking attachment place. Thereby, a control device in an advantageous manner can be installed only in a predetermined installation location. In not predetermined installation locations, the installation is prevented via the blocking attachment place.  
         [0011]     In accordance with a further embodiment of the present invention, the control device has four possible attachment places, wherein one of the attachment places is blocked. In this embodiment, in an advantageous manner the control device can be mounted in accordance with the customer catalog of the working circuit ARS, and simultaneously the recommendations of the working circle can be fulfilled.  
         [0012]     In accordance with a further preferable embodiment of the present invention, the control device in an advantageous manner is formed as an airbag control device.  
         [0013]     In accordance with a further preferable embodiment of the present invention, the possible attachment places are arranged in a rectangular grid 70 times 95 mm. Thereby in the advantageous manner the requirements for a release unit of restoring systems is fulfilled in accordance with the working circuit ARS.  
         [0014]     The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0015]      FIG. 1  is a view showing the inventive control device with a completely closed attachment place in accordance with the present invention.  
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0016]     An inventive control device is shown in  FIG. 1  and identified as a whole with reference numeral  1 . The control device has a housing  100 . The housing is rectangular and has four possible attachment places each arranged on a respective longitudinal side of the housing in a corresponding corner region.  
         [0017]     A plug  200  is arranged on one longitudinal side of the housing  10  between two attachment places  10  and  20 . An attachment place  40  is provided on a longitudinal side of the housing  100 , which is opposite to the plug  200 . The attachment place  40  is formed as a blocking attachment place  50 . The blocking attachment place  50  is closed and unsuitable for receiving an attachment means. The remaining three attachment places  10 ,  20 ,  30  have recesses for receiving an attachment means.  
         [0018]     The arrangement of the possible attachment places is formed so that with a “key-lock” principle, an exchange during the mounting is excluded. Thereby similar devices can not be installed in an erroneous manner due to a different design of the possible attachment places.  
         [0019]     In the exemplary embodiment shown in  FIG. 1 , four possible attachment places  10 - 40  are provided, wherein one attachment place  40  is closed as a blocking attachment place  50 , and the remaining three attachment places  10 ,  20 ,  30  are provided with recesses  60  for receiving an attachment means. By different positioning of the blocking attachment places  50 , four different embodiment forms can be determined.  
         [0020]     Installation platforms are associated with corresponding embodiment forms of the control device and are provided with attachment means which correspond to the positions of the open attachment places  10 ,  20 ,  30 . In the position of the blocking attachment place  50  no mounting means is provided. If the control device is installed in an installation platform which is not provided for it, the blocking attachment plate  50  interferes with an attachment means of the installation platform and prevents an unpermissible installation.  
         [0021]     Typically threaded pins or rods can be provided as the attachment means on the installation platforms. Their positions are determined by the corresponding embodiment forms of the control device.  
         [0022]     In the embodiment shown in  FIG. 1 , a rotation-symmetrical variant is provided for each selected position. The rotation-symmetrical variant can be installed by turning about 180° in a not determinable installation platform. This erroneous installation is however recognized during the mounting, since by turning of the control device  1  the plug  200  is located on the opposite side and can no longer can be connected with the plug provided on the installation platform.  
         [0023]     In further not shown embodiments, any number of possible attachment places can be provided. It is also recommended to provide more than one blocking attachment places, so that a plurality of possible combinations of open and blocking attachment places can be produced.  
         [0024]     The blocking attachment places can be formed in different ways. In a housing produced by a pressure casting it is for example possible to produce open or blocking attachment places by punching out or retaining a casting skin. It is also possible to provide in the casting mold the attachment places with recesses or fully cast blocking attachment places.  
         [0025]     In a further manufacturing variant, all possible attachment places  10 - 40  can be provided with openings  60 . By introduction of a suitable device into one attachment place, this mounting place can be blocked. A suitable blocking devices, for example plugs, clamps or similar devices, can be used. Thereby the characterization of the different embodiment forms of the housing can be performed in a later manufacturing step.  
         [0026]     The manufacturing variants have a joint feature in that a uniform housing platform can be utilized, and the different embodiment forms can be determined and characterized by small modifications during casting or later.  
         [0027]     The utilization of a common housing platform has the advantage that the constructions of the printed boards, plugs, etc. can be maintained unchanged, so that for example in an airbag control device only the crush data set is to be changed.  
         [0028]     It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.  
         [0029]     While the invention has been illustrated and described as embodied in control device with blockable attachment places, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.  
         [0030]     Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.