DE8816214U1 - PCB connectors for detachable connection of two printed circuit boards in particular - Google Patents

Description

\ Printed circuit board connectors for the detachable connection of two printed circuit boards in particular y

The invention relates to a circuit board connector, in particular for the detachable connection of preferably two circuit boards, according to the preamble of claim 1.

It is known to arrange circuit boards perpendicular to each other, whereby one of the two circuit boards is usually equipped with electronic components and the other circuit board serves as a so-called base plate. For this purpose, it is known, for example, to arrange one of the two conductors boards with a row of contact pins on the side to be contacted and the other circuit board, usually the base plate, with correspondingly designed sockets or plug contacts, into which the contact pins of the other circuit board are then inserted. to ensure a simultaneous mechanical and to establish an electrical connection. The disadvantage of this

28.02.1989 \ ^: !'\. y! ".'K»4^:*'2feLO05183-06

■&idigr; 1 known connectors is that firstly both the

&iacgr; Contact pins as well as the contact sockets on the respective

If circuit boards have to be attached, which is in the

jV majority of cases by through-plating and soldering

& 5. This requires a considerable amount of time

% necessary for attaching the soldering pads and drilling them,

\ and furthermore, during the soldering process, care must be taken

I" that the solder pads mounted in the 2.54 mm pitch are not

&Igr; can be short-circuited by solder bridges. Furthermore,

I 10 the disadvantage that due to the large number of* 7,u active

H The contacts require a high insertion force to ensure a

i to establish good electrical contact, while still

I Care must be taken not to plug any of the contacts behind, as this could lead to a faulty connection

; 15 can. The high insertion forces also require high output

■ pulling forces, whereby in the worst case due to the high

u forces to be applied to the circuit boards themselves or

I electrical components mounted on it may be damaged. Finally, there is a risk that the

20 high insertion forces can cause the contact pins to be bent or even kinked or broken.

Despite the high insertion forces, such steel systems have only a low mechanical load-bearing capacity, since they

25 short insertion depth only absorbs small tilting moments

It is therefore necessary in the majority of cases to provide additional fastening elements in the form of metal brackets or the like in order to maintain the vertical arrangement of the circuit boards to one another.

30 to be able to hold.

US-PS 2,825,037 discloses a clamping device for vertically mounted beams . terplatten, in which one of the circuit boards, in the

35 As a rule, the base plate has a slot-shaped milling recess into which the vertically mounted

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The circuit board to be mounted is inserted with some play. Spring-loaded contact brackets are arranged on the long sides of the cutout, with their contact tips extending upwards from the base plate. The contact brackets pass through the base plate and are connected to one another at the underside by means of an expansion joint. When the vertical circuit board is pushed into the cutout, the lower edge of the circuit board hits the black point of the expansion joint and spreads it apart, so that the contact tips of the contact brackets are moved towards one another and clamp the circuit board to be mounted vertically between them.

Apart from the considerable construction effort, which in no way meets today's needs for a space-saving construction, this well-known device also has other, not insignificant disadvantages:
The contact tips of the contact brackets come into contact with the circuit board as it is being inserted, and the contact force increases as the circuit board is inserted, so that the contact tips rub against the circuit board, and there is a risk of damage to the conductor tracks or contact surfaces on the conductor track, which are only a few hundredths of a millimeter thick. Furthermore, the stability of the connection is also inadequate in this known device, so that additional holding means* such as support brackets or the like must be used.

It is therefore the object of the present invention to design a circuit board connector according to the preamble of claim 1 in such a way that a force-free insertion process is possible with a minimal size and yet a reliably reproducible safe electrical and mechanical

28.02.1989 '"'.''.'.'l":'" I Kw4^::*2pLO05183-06

mechanical connection of the two circuit boards with each other.

This object is achieved according to the invention by the features specified in claim 1.

Advantageous further developments of the invention result from the subclaims.

Further details, features and advantages of the present invention will become apparent from the following description with reference to the drawing.

It shows:
15

Fig. 1 is a greatly enlarged sectional view of a first embodiment of a printed circuit board connector according to the invention along the line II in Fig. 2;
20

Fig. 2 is a top view of the circuit board connector of Fig. ₁ without the actuating device;

Fig. 3 is a top view of a circuit board connector according to the invention with actuating devices inserted;

Fig. 4 is a view of a particularly advantageously usable in the context of the present invention

circuit board;

Fig. 5 a view of the PCB connector in

Fig. 1 in the direction of arrow V; 35

Fig. 6 shows a modification of the present invention;

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Fig. 7 is a view of a circuit board connector according to the invention with an inserted circuit board;

Fig. 8 is a perspective view of a second embodiment of the present invention;

Fig. 9 is a sectional view along the line IX-IX in

Fig. 8? and
10

Fig. 10 a modification of the PCB connector

according to Fig. 8 and 9.

According to Fig. 1, a circuit board connector 2 according to the invention essentially has a base body 4 with two side walls 6 and 8, which according to Fig. 3 has a rectangular, elongated outline. According to Fig. 1, the base body 4 is fastened to a circuit board 10 in that pins 12 arranged on the underside of the base body 4, only one of which is shown in Fig. 1, are inserted into corresponding holes in the circuit board and are fixed in position there, if necessary by gluing.

The circuit board connector 2 also has an actuating device 14. The actuating device 14 consists essentially of a gripping area 16 and a downwardly projecting pressure part 18, which according to Fig. 1 is wedge-shaped with a wedge surface 20 running perpendicular to the gripping area 16 and a further wedge surface 22 running obliquely to the gripping area 16. The wedge surface 22 slides on a correspondingly designed counter surface 24 on the side wall 6 of the base body 4, the counter surface 24 being inclined to an outer surface 26 of the base body 4 by the same angle as the wedge surface 22 to the wedge surface.

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In the bottom area of the base body 4, a support area 28 of a contact part 30 is arranged between the side walls 6 and 8. The fastening of the support area 28 in the material of the side walls 6 and 8 of the base body

4 is carried out in such a way that at the front sides of the
Carrier area 28 Locking projections 32 and 34
aiijnoKUäst are- which in Roirjree ^r> <?n'3i.e£'5ncl ?i\is ^a &bgr; formed

&Pgr; locking contours 36 and 38 of the side walls 6 and 8 engage. Furthermore, projections 40 and 42 are formed on the inner sides of the side walls 6 and 8 in such a way that the carrier area 28 between the projections 40 and 42 or the locking contours 36 and 38 both in

Fixed in both horizontal and vertical direction
The projection 40 also serves as a
Depth stop for the printed part 18 and the projection 42 serves as a depth stop for a circuit board 44, such as
will be explained in detail later.

20

A leg 46 of a spring region 48 of the contact part 30 extends vertically upwards from the support region 28 extending like a crossbeam. The spring region 48 is a

curved leaf spring, which is in the form of a 90 rotated

5 is formed on the carrier area 28 and on the
free end of a leg 46 opposite
leg 50 carries a contact nose 52. On the upper
At the end of the leg 46, a semicircular projection 54 is formed, which is engaged by a hook-shaped stop 56 of the pressure part 18. Vertically above the stop 56, a recess 58 corresponding to the shape of the projection 54 is formed on the wedge surface 20 of the pressure part 18.

35

At the lower edge of the

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A connecting pin 60 is formed in the carrier area 28, which, according to Fig. 1, protrudes so far that it passes through the circuit board 10. In the middle area of the connecting pin 60, a thickening 62 is formed, which rests against the inner wall of a hole 64 in the circuit board 10 under slight pressure, so that when the base body 4 is finally attached by means of wave soldering or the like, in which the protruding area of the connecting pin 60 is connected to the circuit board 10, the base body 4 cannot slip or float.

For better handling of the actuating device 14, a recess 66 is provided on the upper side of the handle area 16 and a recess 68 is formed on the outer underside of the handle area 16.

As can be seen in particular from Fig. 3, a plurality of insertion pockets 70 are provided on the top of the base body 4, which are separated from one another by webs 72. The insertion pockets 70 serve to accommodate the circuit board 44, as will be explained below. The insertion pockets 70 have insertion bevels 74 and 76, which make it easier to insert the circuit board 44 into the insertion pockets 70.

The webs 72 extend from the material of the side wall 8 in the direction of the actuating device 14 and, in the area there between the insertion pockets 70 and an opening 78 for the pressure part 18, merge into a continuous cross member 80 which covers the spring areas 48 of the contact parts 30.

As can be seen in particular from Fig. 2,

in the pockets 70 the contact lugs 52 of the spring

area 46 in order to contact a circuit board 44 inserted into the insertion pockets 70.

28.02.1989

According to Fig. 4, a circuit board for the circuit board connector 2 has a specially shaped insertion side 82. More precisely, the insertion side 82 is divided in a comb-like manner by a plurality of recesses 84 in its full area and by recesses 86 in its edge area, so that a plurality of plug-in tongues 88 are formed, on which in turn a plurality of contact surfaces 90 are formed, which are shown in Fig. 4 by dash-dotted lines. The number of contact surfaces 90 on the plug-in tongues 88 in the illustrated embodiment according to Fig. 4 is four or five per plug-in tongue 88.

In the following, the functionality of the circuit board connector according to the invention will be explained in more detail - still with reference to the drawing:

First, the socket body 4 is attached to the circuit board 10, which serves as a base plate, by the pins 12 and the connection pins 60 are inserted into corresponding holes in the circuit board 10 and are secured there by gluing or soldering. It is advantageous to provide at least two pins 12 on the respective narrow sides of the base body 4 hen, with the pins 12 different diameters so that a form coding ensures

&ogr; that the base body 4 is not offset by 180 and is therefore incorrectly mounted on the circuit board 10. To connect the circuit board 10 with the circuit board 44, where the circuit board 44 is to be arranged perpendicular to the circuit board 10, the circuit board connector 2 is in the position shown in Fig. 1, in which the actuating device 14 is in the release position shown in Fig. 1. In this position according to Fig. 1, the stroke 56 of the pressure part 18 in contact with the projection 54 of the spring area 48 and the spring area 48 is

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in a relaxed position in which the contact nose does not protrude into the insertion pocket 70. It should be noted at this point that, according to Fig. 2, a plurality of contact parts 30 or spring areas 48 are provided parallel to one another in the longitudinal direction of the base body 4, the number of spring areas 48 that open into the insertion pockets 70 corresponding to the number of contact surfaces 90 on the plug-in tongues 88 of the circuit board 44. For connecting and contacting the conductors board 44 with the circuit board 10, the circuit board 44 is inserted into the base body 4 or into the insertion pockets 70 located there, whereby the individual plug-in tongues 88 come to lie in the insertion pockets 70 and the recesses 84 or the cutouts 86 on the Circuit board 44 overlaps the webs 72 on the base body 4. Since the contact lugs 52 of the spring areas 48 are in the retracted or relaxed position according to Fig. 1, the insertion of the circuit board 44 or the plug-in tongues S 3 into the plug-in pocket 70 can be essentially completely force-free. The insertion depth of the circuit board 44 into the socket body 4 is limited by the projection 42, so that a uniform and defined insertion depth can be achieved.

After the circuit board 44 has been inserted into the insertion pockets 70, the actuating device 14 is operated to mechanically connect the circuit board 44 to the base body 4 and thus electrically to the circuit board 10 via the contact part 30. setting of this mechanical and electrical connection, the handle area 16 of the actuating device 14 in Fig. 1 is pressed downwards, whereby the wedge surface 22 of the pressure part 18 slides on the corresponding counter surface 24 of the side wall 6 until a lower end surface 92 of the pressure part 18 comes to rest on the top of the projection. During the downward movement

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movement of the pressure part 18, due to the oblique guidance of the wedge surface 22 on the counter surface 24, a movement of the pressure part 18 directed to the left in Fig. 1 takes place, which is transmitted via the projection 54 to the spring area 48 and thus to the contact nose 52. Thus,

the contact nose 52 is pressed resiliently against |; the contact surface 90 of the circuit board 44, so that

t- an electrical contact between the contact surface 90

and the connecting pin 60 via the spring area 48 and the V 10 carrier area 28. In this locking position of the actuating device 14, the projection 54 comes to

the leg 46 of the spring portion 48 in the recess 58 ■i and is held there under spring tension, so

^! ü that the actuating device 14 or the pressure part 18

-| 15 be prevented from returning to the position shown in Fig. 1.

U position to slide back.

# In the locking position of the operating device

^&Aacgr; 14, the contact nose 52 is thus under the force of the spring

% 20 area 48 is pressed against the contact surface 90, and the circuit board 44 is supported over a large area on the projection 42 or an inner wall 94 of the side wall 8 of the base body 4. The material used for the spring area 48 is preferably phosphor bronze or another re relatively stiff spring material is used so that the ^n-

pressing force of the contact nose 52 on the circuit board 44 or its contact surface 90 is relatively high and thus in connection with the large-area support on the projection 42 and the inner wall 94 a sufficiently high mo- rient support of the circuit board 44 relative to the circuit board 10 is achieved, so that additional stabilizing means such as angle supports or the like can be dispensed with. Since the contact force of the contact nose 52 on the contact surface 90 is relatively high, ensure that any oxide layers on the

Contact surface 90 or the contact nose 52 in the moracmt of

28.02.1989 " ,'··<,.· · .' K^VBf .,32LO05183-06

Contacting can be broken and a reliable electrical contact is established. To reduce the contact resistance between the contact surface 90 and the contact nose 52, the contact nose 52 can be tinned or gold-plated in order to effectively prevent the build-up of any oxide layers. The contact surface 90 can also be tinned or gold-plated.

It should be noted here that when the actuator is activated

At least three or four contact parts 30 can be actuated simultaneously by the actuating device 14, whereby the actuation of three or four contact parts takes place simultaneously when a pressure part 18 is assigned to a pocket. As shown in Fig. 3, however, it is advantageous to assign a pressure part IP or an actuating device 14 to at least three pockets 70, so that when an actuating device 14 is actuated, between 10 and 15 contact parts 30 are actuated simultaneously. In the locking position of the actuating device 14, the lower edge of the handle area 16 sits on the top of the base body 4, so that the entire base body 4 is essentially completely encapsulated under the interaction of the handle area 16 and the cross member 50, and the contact parts 30 are thus protected from contamination or the like.

If the circuit board 44 is to be released or separated from the base body 4 or the circuit board 10, the gripping area(s) 16 are gripped behind the recesses 68 and pulled upwards, whereby the projection 54 comes out of engagement with the recess 58 and the wedge surface 22 on the counter surface 24 slides back upwards into the position according to Fig. 1. As a result, the pressure part 18 moves to the right in Fig. 1, so that the spring areas 48 actuated by the pressure part 18 also return to their relaxed position according to Fig. 1 and the

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Contact lugs 52 are lifted off the contact surfaces 90. If the actuating device 14 or the actuating devices 14 have been returned to the position shown in Fig. 1, the circuit board 44 can be practically can be removed from the base body 4 or the insertion pockets 70 without any force.

Fig. 7 shows how the circuit board 44, which serves to accommodate electronic components, of which a component S6 is shown as an example, _is inserted into the socket 4, the actuating device 14 or its grip region 16 still being in the release position according to Fig. 1.

Fig. 6 shows a modification of the present invention, which concerns the design of the connecting pin 60. According to Fig. 6, the connecting pin 60 does not have the thickening 62, but is curved at its end region, so that a hook region 98 It is particularly advantageous to design the hook areas in such a way that two adjacent

Connecting pins 60 have hook areas 98 and 100, which

&ogr; zusiri2"dsr uir. IBQ shifted «incL This results in a canoe-like design of the hook areas 98 and 100, whereby when the socket body 4 is inserted into the hole 64 of the circuit board 10, the connection pins 60 are elastically deformed until the hook areas 98 and 100 have completely penetrated the hole 64 and elastically spring back into their starting positions on the underside of the circuit board .10, so that a position according to Fig. 6 is obtained in which the socket body 4 is reliably connected to the circuit board 10 solely by the engagement of the hook areas 98 and 100.

In the following, a second embodiment of the

The present invention is described with reference to Figs. 8 to 10.

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be used. The first embodiment corresponding

Parts of the second embodiment are provided with the same reference numerals; a detailed description is not given again.
5

Under certain conditions, particularly in the case of extreme acceleration or vibration loads, it may be the case that the circuit board connector according to the first embodiment is not able to hold the circuit board 44 sufficiently securely due to the clamping of the further circuit board 44 between the side wall 8 and the contact nose 52, particularly if the circuit board 44 is equipped with comparatively heavy components.

The second embodiment of the circuit board connector according to the invention according to Figs. 8 to 10 addresses this problem in that the additional circuit board 44 is no longer held in the base body 4 by the spring-loaded contacts. For this purpose, according to Fig. 9, the actuating device 14 is designed in such a way that each pressure part 18 acts directly on the circuit board 44, without a contact spring being provided as an intermediate medium. According to Fig. 9, the actuating device 14 has a sliding part 102 starting from the handle area 16 which runs horizontally and extends essentially over the entire width of the base body 4, which is arranged essentially horizontally inside the base body 4 and has a plurality of essentially vertically running pressure bodies 104 on its free edge facing away from the handle area 16. The number of pressure bodies 104 extending from the pressure part 18 or its sliding part 102 corresponds to the number of poles to be contacted in the socket body 4. According to Fig. 9, each pressure body 104 has a projecting area 106 which protrudes into the

28.02.1989 · '.·..· : :' : KV*** i 22M)O5183-06

L pockets 70 protrude, whereby according to Fig. 8 at

for example, two Iflin plug-in pockets 70 are provided, which are separated from each other by a separating web 108. The separating web 108 serves as a coding and is intended to prevent the circuit board 44 from being incorrectly inserted into the socket body 4.

As can also be seen from Fig. 9, a stop tongue 110 is formed on the lower free end of the pressure body 104, parallel to the sliding part 102 and thus running horizontally. In this case, such a stop tongue 110 can be formed on each pressure body 104; in practice, however, it has proven sufficient to assign at least one stop tongue 110, preferably two of them, to each insertion pocket 70. The sliding part 102 is pre-tensioned to the left in Fig. 9 by means of a compression spring 112, the compression spring 112 being held in suitable spring seats on the side wall 6 of the base body 4 or on the pressure body 104. In order to obtain a contact pressure that is uniform across the entire width of the base body 4, each pressure body 104 is advantageously assigned a corresponding compression spring 112, so that the number of compression springs 112 corresponds to the number of poles of the base body 4 to be contacted. 25

As can be seen in particular from Fig. 8, the insertion pockets 70 in the area of the side wall 8 of the base body 4 are constructed in such a way that chambers 116 separated from one another are defined by support ribs 114, whereby the chambers 116 serve to accommodate spring contacts, as can best be seen from Fig. 9. In the transition area between the pressure body 104 and the sliding part 102, a step-shaped shoulder 120 is provided on the pressure part 18, the shape of which corresponds essentially to a step-shaped projection 122 which is provided on an upper cover 124 of the base body 4.

28.02.1989 ''>'>·',.: I ,' #V*P!..i2LO05183-06

cle body 4 and projects downwards as shown in Fig. 9.

In the locking position of the pressure part 18 shown in Fig. 9, the shoulder 120 and the projection are not in engagement with one another.

As can be seen in particular from Fig. 8, a slot-shaped recess 126 is formed in the cover 124 immediately adjacent to the handle area 16 of the pressure part 18.

The operation of the second embodiment of the circuit board connector according to the invention is as follows:

In the release position of the pressure part IS, this is displaced to the right and upwards against the force of the compression springs 112 compared to the illustration in Fig. 9, with the shoulder 120 engaging behind the projection 122, so that the pressure part 18 is displaced against the force of the compression springs 112 is locked by a positive fit between the shoulder and the projection 122. Because the pressure part 18 is offset to the right in Fig. 9, the individual nose-shaped areas 106 on the pressure bodies 104 are out of the chambers 116 of the insertion pockets 70 withdrawn so that the circuit board 44, which on the side facing the side wall 8 of the base body 4 carries the contact surfaces 90 corresponding to the individual chambers 116 or the contacts 118 arranged therein, can be inserted into the insertion pockets. In

During the insertion movement of the circuit board 44 into the

The lower edge of the circuit board 44 with the stop tongue 110 still protruding into the chambers 116 comes into contact with the pressure part 44 through the insertion pockets 70 of the base body 4. A pressure pressure that continues to be directed downwards movement of the circuit board 44 into the socket body 4 causes the stop tongues 110 to take along the

28.02.1989 * :\. ^§ j / Kije/B?..32LO05183-06

pressure part 18 in Fig. 9 downwards, so that the shoulder

120 comes out of contact with the projection 122. As soon as the shoulder 120 no longer comes into contact with the projection 122, the pressure part 18 is pressed to the left in Fig. 9 by the force of the compression springs 112, so that the areas 106 come into contact with the side of the circuit board 44 facing away from the contact surfaces 90 and thus the circuit board 44 in Fig. 9 is also pressed to the left until the side of the circuit board 44 which the contact surfaces 90 bear on the front sides of the support ribs 114. As a result, the individual contacts 118 in the chambers 116 are deflected to the left in a spring-loaded manner as shown in Fig. 9 and thus contact the individual contact surfaces 90 under force. To achieve a better contact system, especially in the case of oxidized contact surfaces 90, the individual contacts 118 can have sharp-edged bent contact zones 128, which partially dig into the contact surfaces 90 and thus ensure reliable contact. produce.

In order to move the pressure plate 18 from its locking position shown in Fig. 9 back into the release position, a blade 130 of a 5 screwdriver or similar, as shown in Fig. 10, whereby by turning the blade the handle area 16 of the pressure part 18 is moved to the right against the force of the compression springs 112 in Fig. 9. In the course of the rightward movement of the pressure part 18, the compression springs 112 then cause the pressure part 18 to perform a tilting movement about an imaginary pivot axis S, so that the shoulder 120 again engages behind the projection 122 and the pressure part 18 is again locked in its release position in which the Circuit board 44 can be separated from the socket body 4.

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Fig. 10 shows the possibility of inserting a circuit board 44 into the base body 4, which has contact surfaces 90 on both sides, whereby two contacts HB are then provided per chamber 116. In this case, the pressure bodies 104 of the pressure part 18 is designed in such a way that the projections 106 and additional projections 132 are provided corresponding to the alternating arrangement of the support ribs 114 and chambers 116. The projections 106 press the circuit board 44 against the support ribs 114 in a manner analogous to Fig. 9 and the projections 132 press the additional contact springs 118 shown on the right in Fig. 10 against the contact surfaces 90 of the circuit board 44.

In Fig. 10, a further advantageous design of the connecting pins 60 of the contacts 118 is also shown, namely an angled hook-like spring shape, so that the connecting pins 60, after passing through the circuit board 10, cUe through-hole in the circuit board 10 engage behind in a spring-loaded manner and thus additionally fix the base body 4 in position, which is particularly advantageous when fastening the base body 4 to the circuit board 10 using a wave soldering process, as this prevents the base body 4 from floating. Radio The function and mode of operation of the modification according to Fig. 10 corresponds to that of the embodiment according to Fig. 9.

Compared to the first embodiment according to Figs. 1 to 7, the second embodiment according to Fig. 8 to 10 shows the difference that in the case of the second embodiment, the circuit board 44 is clamped directly between the pressure part 18 and the support ribs 114, i.e. directly between two solid components, so that compared to the embodiment of Fig. 1 to 7 even higher holding forces for the circuit board 44 in the socket body 4. Especially in applications,

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^ä ' . 18

1 where high acceleration forces or strong vibrations are to be expected, this can be advantageous.

5 Furthermore, in the embodiment according to Fig. 8 to 10, layer thickness tolerances of the contact surfaces 90 can be compensated more easily, since in each case a defined contact of the circuit board 44 between the printed part

i 18 and the support ribs 114, whereas

I 10 the individual contacts 118 can spring out individually. ·, In the extreme position of the contact shown in Fig. 9

r 118 rests with its upper free end on

)> the side wall 8 of the chamber 116 or the base body 4

■; so that a safeguard against excessively high loading

v- 15 loading of the contacts 118 on bending is given.

\i According to Fig. 8, the individual base bodies 4 can be

I specified grid size, whereby

§ by a corresponding arrangement, as shown in Fig. 8.

' 20 Clear form coding of the narrow sides of the base

·; body 4 reversed arrangements and thus polarization

'; lungs can be prevented.

In summary, the printed circuit board connector according to the invention has the following essential features and advantages:

; - <uas Inserting the circuit board 44 into the socket body

C: 4 is essentially completely force-free, so that

30 there is no risk of damage to the circuit board 44 or the base body 4 and no signs of wear due to contact parts rubbing against one another;

35 - the locking of the circuit board 44 with the socket body 4 or the circuit board 10 is carried out by the

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wedge-shaped pressure part 18, which means that a high contact pressure of the contact lugs 52 on the contact surfaces 90 can be achieved with minimal effort;

- since the circuit board connector has no parts that rotate or pivot around bearings etc., a very robust construction is achieved, whereby signs of wear and tear are practically non-existent and extremely long service life and reliability are ensured even under harsh operating conditions;

- in the second embodiment and its modification, no additional actuation of any locking elements is necessary, since the pressure part reaches its locking position simply by inserting the circuit board 44;

- Tolerances regarding circuit board thickness and contact surface height can be easily compensated without affecting the holding force;

- in the second embodiment, the circuit board is clamped solely between two counter-stops that are essentially stationary in the base body, without the need for holding forces from contact parts. This makes very high holding forces possible without any wear and tear on the base.

Claims (1)

Protection claims Printed circuit board connector, in particular for the detachable connection of preferably two printed circuit boards, with a plurality of contact parts which, in the contact position, rest resiliently against a printed circuit board and at least electrically connect the printed circuit boards to one another, and with an actuating device for the contact parts, characterized by a base body (4) which can be fixed immovably to one of the printed circuit boards (10), serves to receive the contact parts, and into which a further printed circuit board (44) can be inserted without force when the actuating device (14) is in its release position, and which, together with the contact parts, holds the further printed circuit board (44) when the actuating device (14) is in its locking position. Printed circuit board connector according to claim 1, characterized 28.02.1989 *"'. ¹ V j \' _t ' ,KJfÄH.^LOOSieS-O? characterized in that the actuating device (14) has a plurality of pressure parts (Id) each in the form of a wedge, one wedge surface (22) of which is on a counter surface (24) of the base body (4) slides when the actuating device (14) is moved between its release position and its locking position, and whose other wedge surface (20) rests on the contact part (30) and presses it against the further circuit board (44) in the locking position. 3. Printed circuit board connector according to claim 2, characterized in that the wedge surface (22) facing away from the contact part (30) is inclined to the outer surface (26) of the base body (4). 4. Printed circuit board connector according to claim 2 or 3, characterized in that the wedge surface (20) facing the contact part (30) is parallel to the outer surface (26) of the base body (4). 5. Printed circuit board connector according to one of claims 2 «7 to 4, characterized in that the wedge surface (20) has a recess (58) into which a Projection (54) of the contact part (30) engages when the actuating device (14) is in the locking position. 6. Printed circuit board connector according to one of claims 2 to 5, characterized in that the wedge surface (20) is provided with a stop (56) against which the projection (54) of the contact part (30) rests when the actuating device (14) is in the release position. 35 7. Printed circuit board connector according to one of claims 1 28.02.1989 * '·'>'.· · ' .' &ldquor;KH*J&rdquo;:..22LO05183-07 to 6, characterized in that the actuating device (14) has a gripping area (16) which runs essentially transversely to the direction of displacement of the actuating device (14), the gripping area (16) having a recess on its upper side (66) and has a recess (68) on its underside facing away from the contact parts (30). 8. Printed circuit board connector according to claim 1, characterized in that the contact parts (30) each have a carrier region (28) running transversely to the longitudinal extension of the base body (f) and a spring region (48) which extends from the carrier region (28) extends vertically upwards. 9. Printed circuit board connector according to claim 8, characterized in that the carrier region (28) has locking projections (32, 34) on its end faces, which engage in a force-fitting and/or form-fitting manner in correspondingly designed locking contours (36, 38) of the base body (4). 10. Printed circuit board connector according to one of claims 1 5 to 9, characterized in that a connection pin (60) is formed on the side of the carrier region (28) facing away from the spring region (48). 11. Printed circuit board connector according to claim 10, characterized characterized in that the connecting pin (60) has a thickening in its central region. 12. Printed circuit board connector according to claim 10, characterized in that the terminal pin (60) is hook-shaped at its end region, the hook-shaped end regions of adjacent terminal pins 28.02.1989 (60) are offset from each other by 180. 13. Printed circuit board connector according to one of claims 1 to 12, characterized in that the spring region (48) has a contact nose (52) at its free end. 14. Printed circuit board connector according to one of claims 1 to 13, characterized in that the spring region (48) is designed as a compression spring in the form of a curved leaf spring. 15. Printed circuit board connector according to claim 14, characterized in that the leaf spring is designed as an elongated S rotated by 90°. 16. Printed circuit board connector according to one of claims 1 to 15, characterized in that the base body (4) has on its insertion side a plurality of insertion pockets (70) separated from one another by webs (72). 17. Printed circuit board connector according to claim 1, characterized in that the actuating device (14) is spring-loaded in the direction of its locking position. 18. Printed circuit board connector according to claim 17, characterized in that the actuating device (14) is prestressed by at least one compression spring (112). 19. Printed circuit board connector according to claim 18/characterized in that per contact part (118) a compression spring (112) is provided. 28.02.1989 .*,'·5 &iacgr; ,·* »I^i*f>V*22LO05183-07 1 20. Printed circuit board connector according to one of the claims to 19, characterized in that the actuating device (14) is locked in its release position. 21. Printed circuit board connector according to claim 20, characterized by locking projections (120, 122) on the actuating device (14) and the base body (4) for locking the actuating device (14) in its release position.