DE8016702U1 - Tool for removing circuit elements - Google Patents

Description

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Tool for removing circuit breakers

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The innovation relates to tools for removing in brackets arranged circuit elements, in particular on the removal of dual-inline housings with printed circuit (DILICS) from printed Circuit board. "

There are already several proposals for such tools; these however, known tools are complicated and therefore expensive to manufacture. For example, U.S. Patent No. 3,579,795 shows a power amplified Tool with a pair of opposed and cooperating Jaws pivotably connected to a retractable plunger. Such a tool has a number of Springs, plungers and levers and makes oinen machined, with Screw-threaded bodies as well as specially shaped pressed metal jaw parts with swivel mountings required. In addition, a source of compressed air is used to operate one embodiment of this tool required, whereby the mobility of the tool is considerably limited and the use is complicated.

The task of the innovation is to provide a tool of the generic type to design that it is simple in construction, cheap to manufacture and easy to use.

According to the innovation, a tool for releasing formwork elements from a holder, which has a first component with stops which come into engagement with the surface of the holder, and a second component, which has two opposite approaches for detecting the circuit element and that with respect to the first component is retractable, proposed that the first component is a first

Has pair of substantially parallel legs that interlock with each other än their upper ends are connected / with the Urtteifen ends the Form stops, and that the second component is a second pair of has substantially parallel legs / the with each other their upper ends are connected and have lugs at the lower ends, the second component within the first component is arranged in a sliding manner

During operation, a force can be applied between the components / so that the second component is pulled upward away from the holder, while the first component comes into contact with the holder, so that an upward force is applied to the element to release it from the holder.

The terms "top" and "bottom" refer to the tool position to be regarded as relative. The tool can of course also be used to pull circuit elements horizontally or vertically close down directional movement can be used, depending on the position of the bracket on which the elements are mounted.

Further features of the innovation are the subject of the subclaims.

An embodiment of a tool according to the invention is shown below explained in connection with Figures 1 and 2, FIG. 1 being a Front view of the tool and Fig. 2 is a side view of this tool.

According to FIGS. 1 and 2, the tool has a U-shaped component 1 with parallel legs 2 and a second, U-shaped component 3 with parallel legs 4. Each component is preferably made by bending a correspondingly pre-formed metal strip. The second

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Component 3 can still be up and down within the first component

slide and is held in its ¹ position by lapping 5 / the with

the legs 4 are integrally formed; these laps will be around the legs 2 curved *

The second component 3 is with respect to the first component with the help of a Spring 6 biased downward; the spring is arranged between the upper ends of the two components. The first component 1 has two elongated slots 7 in its legs 2, and the second component 3 receives two stops 8, which are positioned within the slots and which serve to limit the downward movement of the second component · The stops 8 also contribute to the mechanical stability of the component 3 sliding within component 1. The lower end of each leg 4 is bent over and forms a projection 9 as well two more approaches 16.

In Fig. 1 the tool is shown in the position in which a DILIC 10 is withdrawn from a socket 11, which in turn is on a printed circuit board 12 is attached. The socket 11 has a recess 13 at each end, which together form a pair and with the help of which the projection 9 on the second component 3 comes into engagement with the underside of the DILIC 10. The position of the stop 8 is chosen so that the lugs 9 are aligned with these recesses are when the ends of the legs 2 of the first component are in contact with the printed circuit board. The others come in this position Approaches 16 with the upper surface of the DILIC 10 in engagement

The DILIC can be removed from the socket 11 in that the upper ends of the two components 1, 3 are pressed together between the fingers and the thumb. As a result, the second component 3 is after moved up against the pressure of the spring 6, while the ends of the

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Leg 2 held firmly in engagement with the printed circuit board Will. Since the ends of the legs 2 remain in contact, since the lugs 9 move at the same time, the pull-off force is always approximately perpendicular to the surface of the circuit board. Furthermore, the approaches hinder 16 the DILIC against tipping. This prevents the pins of the DILIC from being bent when the DILIC is released from the socket.

To bring the tool into the position shown in Fig. 1, the ends of the legs 2, 4 must be bent apart slightly, so that the approaches 9 can be placed over the ends of the DILIC 10. There is only a very short distance between the DILIC 10 and the neighboring component required. For example, Fig. 1 shows another DILIC 14 on the printed circuit board 12, which is of the The first DILIC 10 is separated by a narrow gap, which is wide enough, however, so that the tool can be applied properly.

The tool can also be used to loosen and remove DILICS that are attached directly, i.e. without a socket, to printed circuit boards. I _n this case, the stopper 8 is removed and instead, in a hole 15 in the leg 4 to the original position used. In this way, before it is locked by the stop, the second component can move further downward into a position in which the lugs 9 touch the surface of the circuit board and can thus hook below the DILIC.

In a modified embodiment of the tool, the stops 8 be permanently attached in the holes 15. In this case, the movement of the component 3 is adjusted with the aid of a A pair of bent wire stops (not shown) which are attached to the outside of the legs 2. When the tool can be used to remove DILICS fastened in sockets

should, these bent wire stops are hooked over the stops 8 so that they the downward movement of the component 3 in the in limit the position shown in the drawing »If the removal tool is attached directly to the printed circuit board DILICS is to be used, these curved wire stops are pivoted to the side so that the stops 8 down to the lower ends of the slots 7 can migrate.

Claims (7)

I f I t P \ ι: ■ Protection claims 1. Tool for removing circuit elements from a holder, with a first component with stops / which come into engagement with the surface of the bracket, and a second component that two opposite approaches to detecting the circuit element and which is retractable with respect to the first component, characterized in that the first component (i) is a first pair of substantially parallel legs (2, 2) connected to one another at their upper ends, the lower The ends of the stops form such that the second component (3) has a second pair of essentially parallel legs (4, 4), which are connected to each other at their upper ends and lugs (9, 16) at the lower ends, and that the second component (3) is slidably disposed within the first component (i). 2. Tool according to "nspruch 1, characterized in that the lower Ends of each leg (4), the second pair are bent inward and form the lugs (9, 16). 3. Tool according to claim 1 or 2, characterized in that each Pair of legs (2, 2/4, 4) has a flat strip formed into a U-shape. 4. Tool according to claim 3, characterized in that the strips have substantially the same width and are engaged with one another by means of tabs (5) extending from the edges of each Leg of a component go out, which are designed so that they are in engagement with the edges of the corresponding leg of the other component " • · · ·· Ii • »· · t 1» I 'II> I ■ I Ii,, 5. Tool according to one of claims 1 to 4, characterized in that that the legs of the first component are longer than those of the second component and that a spring (6) between them connected areas of the upper ends of the components (1, 3) so arranged are that they are stretched away from each other. 6. Tool according to claim 4 or 5, characterized in that two Guide pins (8) are provided, one of which extends in front of the surface of each leg of a component and with a elongated slot (7) cooperates in the corresponding leg of the other component. 7. Tool according to one of claims 2 to 6, characterized in that that at least one further, inwardly bent Texl (16) in the Is provided near the lower end of each leg of the pair and spaced from the outermost end (9).