DD283519A7 - KEY ELEMENT FOR THE LOOSABLE CONNECTION OF FLAECHIC CONSTRUCTION ELEMENTS - Google Patents

Abstract

Locking element in particular for the attachment of printed circuit boards which are arranged in a housing of a cassette recorder in Fuehrungsschienen and held formschlüssig by the locking element. Erfindungsgemaesz consists of the detent element of a detent spring which is abgeschraegt the rear end for better operation and is provided on the bottom with a locking pin. At the front engaging part of the locking element is provided with a kreisfoermig trained clamping spring, which has an inner and aeuszere locking lug. Fig. 1 {latching element; Fastener; Snap; flat construction elements; PCB mounting; house construction; Fixing the position; Plast spring; Connection, solvable}

Description

-2- 2835Ί9

beveled side to the wall thickness of the circuit board without tools, the circuit board is released from its detent. Due to the lower spring force of the detent spring relative to the clamping spring, the locking element always remains in its fixed position in the housing part.

Ausführungsheispiel

The invention will be explained below using an exemplary embodiment. The accompanying drawing shows:

Fig. 1: locking element

Fig.2: locking element in the housing with construction element.

To secure surface construction elements 7 securely in housing parts 9, gem. Fig. 1 by means of locking element 1 consisting of clamping spring 5 with outer locking lug 4, inner latching lug 3 and detent spring 6 with locking pin 2 a secure seat realized in all 3 levels.

According to Fig. 2, the locking element 1 can be releasably engaged in the housing part 9 by the two guide rails 10,11 and the locking grooves 12,13 before installation by means of clamping spring 5. For this purpose, the outer latching lug 4 is guided behind the outer latching groove 13 and the latching element 1 is moved in the direction of the inner latching groove 12 until the inner latching lug 3 engages in the inner Tastnut 12. Now acts one of Federkräfto of the clamping spring b and gives the locking element 1 a secure fit.

Thereafter, the construction element 7 is inserted between the lower guide rail 11 and the upper guide rail 10 until the locking pin 2 is above the receptacle 8 and the live detent spring 6, by dipping the locking pin 2 in the receptacle 8, returns to its original position. Here, the other spring force acts. Now the construction element 7 is securely fixed.

By lifting the detent spring 6 on the cranked side to the wall thickness of the structural element 7 without tools, the structural element 7 is released from its detent. Due to the lower spring force in front of the detent spring 6 relative to the clamping spring 5, the locking element 1 always remains in its fixed position. The locking element 1 is easily replaceable with natural wear again.

Claims (2)

Detent element for detachable connection of planar construction elements, preferably printed circuit boards, which are inserted in guide rails, want to lock the locking element, the upper guide rail locking grooves, characterized in that the detent element (17) consists of a detent spring (6) beveled at the rear end and is provided on the bottom with a locking pin (2) and the front has a semicircular Klemmfed9r (5), which has an inner latching lug (3) and an outer latching lug (4). For this 2 pages drawings Field of application of the invention Dio Ei invention relates to a Rastolement for detachable connection of planar construction elements, in particular of printed circuit boards, which are arranged in a housing of a cassette recorder. Characteristic of the known state of the art It belongs to the well-known state of the art to arrange flat construction elements, for example circuit boards, in a device carrier by being insertable in different operating positions. The attachment is made by multiple screw connections or plug-screw connections. The disadvantage here is the relatively large production and service costs when attaching or loosening the screw, the low reliability of mounting the circuit boards with repeated screwing and the lack of precise repeatability of the installation position. It is also a fastener for plate-shaped rack, preferably printed circuit boards, consisting of a guide and a lock and a counter-used. The guide is designed so that at the upper tapered and resilient end there is an unlocking with a detent located thereon. On the other side of the guide, a resilient fork-shaped compensating piece with drainage surfaces bevelled on both sides and fixing pins on the lower side are arranged. The lock has a locking lug with a corresponding locking lug with downstream guide rail. The disadvantage here is the high production cost, the low ease of service and, due to the different tolerances of the plastic parts with each other that they do not allow precise location of the circuit boards. From DE-OS 2510177 a plug-in flat plastic clip is still known, which is used for releasable connection superimposed, areal components. The clip is U-shaped and provided with at least one, the distance of the components determining central web. The planar components are inserted with their end faces in the spaces formed by the side bars and the central web or the central webs. The disadvantage here in addition to the high production cost that the circuit boards can not be fixed in position laterally secure when mounting in several levels, the detent is not reliable and that when repairing the components, the clip must be removed and replaced with. Furthermore, from DE-OS 2928473 a double chamber for connecting planar structural parts known. In the automotive industry, such double clamps are used for attaching trim and upholstery parts to sheet metal frame parts of vehicle seats and backrests. They are immovably self-centering mounted on a thin-walled sheet-like construction part. The disadvantage here is the large production costs iid the inaccurate position fixing, which precludes the use of the double clamp for PCB assembly. Object of the invention When applying the invention, the material and manufacturing costs are reduced, achieved a reliable fixation and attachment of the circuit board and achieved the ease of servicing by reducing parts. Explanation of the essence of the invention The technical task is to realize an easily releasable positive-locking attachment of flat construction elements by a self-holding and replaceable snap-action locking element is used, that the sheet-like construction element securely fixed in all three levels by different acting spring forces. According to the invention, the locking element consists of a detent spring which is bevelled at the rear end for better operation and is provided on the bottom with a locking pin. At the front latching part, the locking element is provided with a circular clamping spring, which has an inner and an outer latching lug. In the housing part of the upper guide rail is provided with each inner and outer locking groove, the locking element introduced so that the outer locking lug is hooked behind dio outer locking groove and the locking element is moved so far towards inner locking groove until the inner locking lug in the inner locking groove snaps. It acts one of the spring forces of the clamping spring which guarantees the locking element a secure fit. The printed circuit board is inserted between the attached to the housing part two guide rails until the locking pin on the recording is located and the energized detent spring can go back to its original position. Here, one of the spring forces of the detent spring acts. By lifting the detent spring on the