Attachment element for a body in a wall

Details Attachment element for a body in a wall Attachment element for a body in a wall

1997-04-21

1999-09-14

Stodola, Daniel P.

Joints and connections

Rod end to transverse side of member

Utilizing opposite sides of member

403315, 403319, 4034051, 4034071, 411339, 411508, 411913, 24453, B25G 300

Patent

active

059511940

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND INFORMATION

German Patent Application No. 38 12 182 describes an ultrasound transducer with a cylinder-shaped body; to attach it, this body is inserted through a bore in a bumper of a motor vehicle and secured from falling out, from the back, using a resilient element. It has been shown that such an element can only be installed in a restricted installation angle relative to the wall. Different vehicle types, however, can have various angles of inclination relative to the road surface, so that different attachment elements might be necessary, depending on the vehicle type. However, producing these different attachment elements increases the production and warehousing costs and is therefore undesirable. Furthermore, it is disadvantageous that the removal of the attachment element with the body can be quite difficult and time-consuming.
Great Britain Patent Application No. 679 441 describes an attachment clip with which electronic components such as coils, switches, etc., can be attached to a carrier plate. The attachment clip consists of a spring part which is pushed through the carrier plate through corresponding openings. The component to be attached is pushed into the springs of the attachment clip, which have been pushed through, from the opposite side of the carrier plate, and locked in place with catch projections. To remove the component, the catch projections must be lifted up with a special tool to release these catch projections from the component.
Great Britain Patent Application No. 1 581 773 describes an attachment ring or locking ring, in which resilient hooks can be caught into corresponding teeth of a body. To attach the body in a bore of a plate, the attachment clip or locking ring is first pushed onto the body until head contact is made. Then, the body is pushed into the prepared opening of the plate, against the pressure of the resilient hooks. The body is released by being pushed out against the spring pressure of the hooks from the rear.


SUMMARY OF THE INVENTION

In contrast, the attachment element according to the present invention, has the advantage that the body can be installed in a pre-determined position even at a large angle of inclination of the wall. No special tools or aids are required. It is also particularly advantageous that removal of the body can take place without special tools or aids, since the catch hooks which engage in one another are released from the corresponding depressions by simple pressure on at least one part of the attachment element, and the attachment element can be removed.
It is further advantageous that with the arrangement of the catch hooks preferably on two opposite sides, they can be easily unlocked, so that the attachment element can be removed from the body and pulled out of the bore.
Because of the resilient structure of the attachment element and the cavity between the attachment element and the body, the lock can be released by simple pressure on these points. This is particularly advantageous in tight spaces, where it is difficult to perform a screw connection, for example, for space reasons.
A particularly simple structure of the attachment element results from the elliptical shape, since it can easily be pressed on its long sides and thereby the diameter of the elliptical opening on its narrow side is increased. If the catch hooks are arranged on this diameter, then they lift off the surface of the body when pressed together. This process can easily be carried out at locations on the bumper or a part of the car body which are not easily accessible.
The structure of the attachment element with two pressure springs which are connected with a wedge-shaped contact part results in the possibility that secure attachment of the body is possible even at large angles of inclination relative to the wall of a car body part. Even in these cases, the contact pressure is evenly distributed over both tips of the molded part.
Particularly simple production results if the attachment element is injection-molded in one piece, for example of a p

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