DE8300515U1 - Plastic housing with removable terminal strips - Google Patents

Description

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For the installation of electrical and electronic circuits and devices, many housings have been developed, the various forms of which are determined by the particular application will.

In recent years, for example, a housing design that snaps onto so-called top-hat rails has established itself can be. A common design of this type of housing consists of a lower housing part, in which preferably the circuit boards of an electrical or electronic device are housed and a housing cover, which receives the electrically conductive terminals and, if necessary also control and signal elements such as potentiometers, switches and light emitting diodes.

Electronic, programmable controls with a large number of inputs and outputs are also accommodated in such housings Output terminals. These terminals are connected to the circuit boards that carry the electrical or electronic components, electrically connected. The connection is made either via switching strands or the terminals are on the circuit board side designed as contact springs which establish the connections with the conductor tracks of the circuit boards.

The connection of the setting potentiometers available in such controls, Light-emitting diodes, switches, etc., which are located in the housing cover, with the electrical ones housed in the lower part of the housing Components, happens via switching strands.

If permanently installed controls have to be replaced, which is the rule in practice, e.g. when the program is changed or in the event of defects, all terminal connection lines must be detached and marked individually so that no mix-ups can occur when reconnecting. After this If the device or circuit boards are exchanged, the lines must be reconnected.

All of this is associated with a considerable expenditure of time and, above all, with a loss of production during the repair time,

which can lead to considerable losses. ,

The disadvantages mentioned verKindern, a case was created that according to the safety requirements detachable from the cover - but sits form-locking connected to these terminal strips loading%. These terminal strips, which can be removed from the housing cover, allow the time- | costly disconnecting and connecting the electrical lines to the terminal strips no longer has to be carried out, since the entire terminal strip can be removed together with the connected connecting lines. This presupposes that the connection between the terminal and the printed circuit board is made by means of a contact spring, as is the case with the housing according to the innovation.

The contact springs of the terminals must be good electrical,;

To ensure connections with the conductor tracks of the circuit board, rest on the conductor tracks with sufficient force.

The forces of the individual contact springs add up, so that at

many terminals produce a considerable total force and:

the circuit board when removing the terminal strip from the V

Housing lower part can be pulled out, which is not desired

However, the implementation according to the innovation provides that the

Housing base latched housing cover over the circuit boards engages and thus prevents the

PCBs can be pulled out. ^

The design of the terminal strip is also advantageous and novel. fj

It consists of the lower part of the terminal, the upper part of the terminal and the 1

electrically conductive terminals. In the lower part are individual ■ §

Chambers provided for receiving the terminals. ;;

- 5 - 1

- 5 -

The chambers are open on both sides, so that the connection terminals can be fed and inserted very cheaply.

Due to the design according to the innovation, the automatic Mounting of the connection terminals possible. After equipping the lower part with the terminals, the cover part is put on and held by snap connections.

An extremely stable terminal strip is created by welding the upper part to the cover part by means of ultrasound.

The innovation is explained in more detail below with the aid of drawings.

Figure 1 shows a housing consisting of the housing lower part 1, the housing cover 2 and the terminal strips 3, a Circuit board 4 with conductor tracks 4a is also shown.

FIG. 2 shows how the housing cover 2 with its molded-on tab 2b engages over the printed circuit board 4 and the screw

Figure 3 shows how the terminal strips 3 from the lower part 6 and cover part 7 and the terminals 8 are assembled with the contact spring 8a.

In igur ^r 1 is seen how the neuerungsgeinässe housing is constructed. The housing cover 2 is provided with the longitudinal recesses 2a into which the terminal strips 3 are inserted in a form-fitting manner. The coding nose 3a is also a guide and only fits into the groove 2c of the housing cover 2. The holes 3b and 2d are through-holes for the screws 5. In the lower part of the housing 1, threaded sockets 1a are embedded into which the fastening screws 5 are screwed. The latching 1b, 2e is used in a known manner to fasten the housing cover 2 to the housing lower part 1.

FIG. 2 shows a detail of how the terminal strip 3 is placed on the printed circuit board 4 and the lower housing part 1.

The screw 5 fulfills three functions; it is initially used to effortlessly plug the terminal strip 3 onto the circuit board 4. After inserting the terminal strip into the guide and coding groove 2c, the contact springs 8 lie on the upper longitudinal edge of the circuit board 4. But they still have no connection with the conductor tracks 4a. In this position the screws 5 capture just that Nut thread in the threaded sockets 1a. By tightening the screws 5, the contact springs 8a are now over the upper longitudinal edge of the Printed circuit board 4 drawn onto the contact tracks 4a.

In the tightened state, the screws 5 hold the clamping strips 3 and the housing cover 2 and housing lower part 1 together.

As can be seen, the screw 5 has a recess 5a in which a slotted disc 5b is engaged. This disc When the screw 5 is unscrewed, 5b is supported on the surface 6a of the terminal strip 3 and thereby presses the terminal strip off the circuit board 4, since this cannot follow because the tab 2b of the clamping plate 2 grips over the circuit board 4. The peeling takes place just as effortless as plugging it on.

Claims (1)

Plastic housing with removable terminal strips. Protection claims Housing made of plastic for accommodating electrical or electronic circuit arrangements and / or devices, consisting from a housing base and from a housing cover with terminal strips, characterized by the following listed features: a) The housing cover 2 has a recess 2a on each of its two longitudinal sides for receiving a terminal strip 3 each. b) The terminal strips 3 fit positively into these recesses 2a, with a coding 3a, 2c the confusion of the two terminal strips is excluded. c) The housing cover 2 is on both of its narrow sides attached to the housing lower part 1 by a latching device 2e, 1b. The latching device on one side is dimensionally different from that of the other side, so that the housing cover 2 only in a certain position on the lower part of the housing can be put on. d) Each terminal strip 3 is attached to the lower part of the housing 1 with 2 screws 5 screwed tight, at the same time the housing cover 2 is screwed tight. e) The terminal strips 3 are equipped with spring-loaded connection terminals 8, which allow direct plugging onto the circuit boards. f) The terminal strip 3 consists of a lower part 6 and a Cover part 7 which after inserting the terminals 8 and the clamping screws 9 are connected by ultrasonic welding. When loosening the screws 5, the terminal strip 3 is removed from the circuit board 4 deducted. .. 2 - __ 2 - h) The housing cover 2 engages with its tabs 2b over the circuit boards 4, so that when the terminal strip 3 is pulled off, the PCB cannot be pulled out with it. ) The housing cover 2 is for the reception of control and signal elements prepared. - 3 -