WO2015024715A1

WO2015024715A1 - Electrical print clamp

Info

Publication number: WO2015024715A1
Application number: PCT/EP2014/065353
Authority: WO
Inventors: Ralf Geske; Simon FOLLMANN
Original assignee: Phoenix Contact Gmbh & Co. Kg
Priority date: 2013-08-23
Filing date: 2014-07-17
Publication date: 2015-02-26
Also published as: CN205882205U

Abstract

The invention relates to an electrical print clamp for mounting on a printed circuit board, comprising: a housing (5) having at least one clamp (3), said clamp (3) comprising a conductor insertion opening (4), a clamping spring for clamping the conductor and at least one solder connection contact (1, 2) that is electrically connected to the clamping spring; and at least one first solder connection contact (1) for through-hole mounting on the printed circuit board and at least one second solder connection contact (2) for surface mounting on the printed circuit board.

Description

Electrical PCB terminal

The invention relates to an electrical pressure terminal for mounting on a printed circuit board, with a housing having at least one terminal, wherein the terminal a

Conductor insertion opening, a clamping spring for clamping the conductor and at least one electrically connected to the clamping spring solder terminal contact. Electrical terminals are known in a variety of configurations, with terminals for

Connecting an electrical conductor to a circuit board can be referred to as a so-called print terminals. There

electronic assemblies are becoming more compact and

Simultaneously map more and more functions, there is a need to adapt PCB connection technology to the small sizes of the other electronic components.

For this purpose, known from the prior art so-called COMBICON HD print terminals in pitch 2.0, 2.5 and 2.54 mm, which are designed either for SMT or reflow soldering processes. SMT stands for surface-mounted technology, whereby the processing is based on the standards DIN EN 61760-1 or IEC 61760-1. In a reflow soldering process, the soft solder is applied in the form of solder paste before placement on the circuit board in a first step and then populated in a second step, the components on the circuit board. But especially with SMD PCB terminal blocks, so PCB terminals in the design as a surface-mounted device for

Surface mounting by means of SMT, the mounting of the PCB terminal on the circuit board is difficult. Because so that the actuating forces when pressing the Print terminal does not affect the actual contact carrier, so the solder connection contacts, almost always so-called anchor metals are added to the terminal, the

attached to the side of the clamp to absorb the corresponding forces. By anchoring metals so on the one hand carried the attachment of the terminal to the circuit board and on the other hand, the interception of the occurring

Actuating forces when operating the terminal. For this purpose, however, it is important to dimension the anchor metals accordingly, so ultimately to provide with a correspondingly sized bearing surface, which in turn requires space on the circuit board. The attachment of the

Anchor metals or the bearing surface with the printed circuit board is just like the solder connection contacts of the PCB terminal by means of SMT.

A disadvantage of anchor metals, however, is that of the

PCB terminal so additionally added components often need crucial space on the PCB, especially with the progressive packing densities

Printed circuit boards and the use of SMD PCB terminals is urgently needed elsewhere.

Based on this situation, it is the object of the present invention, an electrical print terminal

specify, which requires less space on the circuit board compared to the known from the prior art and previously described PCB terminals, the

occurring actuation forces when pressing the

Can intercept the print terminal and beyond is also inexpensive to produce. The object is solved by the features of the independent claims. Advantageous embodiments of the invention are specified in the subclaims. Accordingly, the invention is achieved by an electrical pressure terminal for mounting on a printed circuit board, having a housing having at least one terminal, wherein the terminal a conductor insertion opening, a clamping spring for clamping the conductor and at least one with the

Clamping spring electrically connected solder connection contact

and at least one first solder connection contact is designed for through-hole mounting to the printed circuit board and at least one second solder connection contact to

Surface mounting is performed with the circuit board.

The essential point of the invention is thus the saving of previously known from the prior art and also required anchor metals for attachment of the print terminal to the circuit board and to intercept the actuation forces when operating the terminal in that at least one

Lötanschlusskontakt the print terminal is designed for through-mounting or configured. So while the second solder connection contact, as before, "only" to

Surface mounting is performed with the circuit board, for example, surface soldered surface-mounted to the circuit board is the first

Lötanschlusskontakt assigned a dual functionality, namely on the one hand as well as the second

Lötanschlusskontakt for electrical contacting of the associated terminal and on the other hand for securing the print terminal to the circuit board, thus occurring

Actuating forces can be intercepted accordingly. The fact that additional anchor metals can be saved, on the one hand, the PCB terminal significantly

be made cheaper and faster, and

On the other hand, by saving the anchor metals further space on the circuit board, which is urgently needed in view of the progressive packing densities. The invention thus represents a significant advance in printed circuit terminals and opens up entirely new

Possible uses.

According to the invention, it is therefore provided that at least one first solder connection contact for through-hole mounting and at least one second solder connection contact for

Surface mounting is performed with the circuit board. This means that, for example, either the clamp two

Lötanschlusskontakte, which are preferably both electrically connected to the clamping spring, but one of the Lötanschlusskontakte for through-mounting and the other Lötanschlusskontakt is designed for surface mounting.

Through-hole assembly, English through-hole technology, abbreviated THT, or pin-in-hole technology, the

Montageweise of wired electronic components, so provided with solder terminals electronic components understood that during assembly by

Inserted contact holes in the circuit board and then connected by soldering, such as conventional hand soldering, wave soldering or selective soldering, with a conductor of the circuit board.

Surface mounting, also Surface-Mounting Technology, abbreviated SMT, refers to the surface mounting for so-called surface-mounted components, English Surface-Mounted Devices, abbreviated SMD, by means of

solderable pads are soldered directly to the PCB. The second is preferred

Lötanschlusskontakt designed as or with a solderable pad, wherein the electrical

Connecting the second solder connection contact with a

Conductor of the circuit board can be done for example by reflow soldering. On the other hand, however, several terminals may be provided, so that, for example, in the case of two terminals, the first terminal has the first Lötanschlusskontakt and the second terminal has the second Lötanschlusskontakt. Preferably, the terminals are arranged in a common housing, wherein the housing has a non-conductive material. More preferably, the individual terminals are electrically isolated from each other, but also

It can be provided that an electrical connection between the terminals or arranged therein

Clamping springs can be provided.

In principle, the electrical pressure terminal can be configured as desired. However, the electrical print terminal is particularly preferably designed as an SMD print terminal and has a pitch between two solder terminals of two adjacent terminals of 2 mm, 2.5 mm or 2.54 mm. The housing preferably has a height of 5 mm and a depth of 10 mm or a height of 10 mm and a depth of 5 mm. Similarly, other dimensions are possible, the installation as an SMD PCB terminal in SMT and / or in

Enable connection with other SMD components on the PCB. According to a particularly preferred embodiment, the first solder connection contact extends perpendicular to the second solder connection contact. More preferred is the first

Lötanschlusskontakt as THR contact and / or the second Lötanschlusskontakt designed as an SMD contact. The

means that according to this embodiment, the connection of the first executed as a THR contact Lötanschlusskontaktes done with the circuit board by means of Throuh-Hole Technology and the connection of the second executed as an SMD contact Lötanschlusskontaktes done with the circuit board by means of surface-mounted technology.

According to a further preferred embodiment, the housing has a bearing surface for resting on the printed circuit board, wherein the first solder connection contact in a

Direction extends perpendicularly away from the support surface and the second solder connection contact extends in a direction parallel away from the support surface. In other words, therefore, the solder connection contacts according to this embodiment extend away from the housing in

different directions to each other, namely perpendicular to each other.

In principle, each terminal can be any number of Lötverbindkontakten for electrically connecting the respective terminal to the circuit board and, in the case of Lötanschlusskontakten for through-mounting, as well as for securing the housing to the circuit board and the

Interception of the occurring when operating the terminal

Have actuating forces. After a special

preferred embodiment, however, it is provided that the terminal two configured for through-hole first

Having solder connection contacts, the two

Lötanschlusskontakte each a rectangular Have cross-section and the two solder connection contacts are rotated in such a way that the

Longitudinal side of a cross section adjacent to the broad side of the other cross section is arranged. As a result, a better fixation of the terminal can be achieved, wherein

preferably the closer to the conductor insertion opening solder terminal contact with its broad side towards

Conductor insertion opening is aligned. According to a further particularly preferred embodiment, the electrical pressure terminal on at least three terminals arranged in series with each other, wherein the two outer terminals each two spaced and the

Through-hole designed solder terminals and the inner terminal a to

Having surface mount designed solder terminal contact. Likewise, five or more arranged in series with each other terminals may be provided, wherein the terminals are each preferably adjacent to each other.

Also preferably, each clamp has one each

Conductor insertion opening, a respective clamping spring for clamping the respective conductor and a corresponding electrical contacting of the respective clamping spring with the respective Lötanschlusskontakt. If four or more terminals arranged in series with one another are provided, it is preferred that only the outer terminals for

Through-hole solder contacts designed and have all limited by the outer terminals inner terminals only configured for surface mounting solder terminals.

By the use according to the invention of vertically through the circuit board passing through for through-mounting designed solder connection contacts, which also serve as an anchor for the PCB terminal, also arises between the PCB and the PCB terminal and

limited by the designed for surface mounting solder terminals of the inner terminals further space that can be used on the circuit board.

In this context, it is particularly preferred that the inner terminal a single surface mount designed solder terminal contact, two to

Surface mount configured solder connection contacts or both designed for surface mounting

Solder connection contact and one for through-hole mounting

having designed solder terminal contact. In the case of only a single surface-mounted

Lötanschlusskontaktes this solder connection contact is preferably arranged on the side of the housing, the

is arranged opposite to the conductor insertion opening. In the case of a designed for surface mounting Lötanschlusskontaktes and designed for through-hole solder terminal contact is the for

Through-hole designed solder connection contact

preferably adjacent to the conductor insertion opening and the surface mount designed Lötanschlusskontakt preferably spaced from the conductor insertion opening

arranged, ie farther away than the

Through-hole designed solder connection contact. By not only on the outer terminals but also on the inner terminals located for through-hole mounting

designed solder connection contacts is an additional security in terms of expected

Actuating forces created so that an even more stable and reliable attachment of the housing of the print terminal is achieved on the circuit board. According to yet another preferred embodiment, it is provided that the conductor insertion direction in the

Clamp is perpendicular or parallel to the extension direction of the first Lötanschlusskontaktes. Accordingly, it is preferred that the clamp in terms of their

Conductor insertion direction, placed on the circuit board, either perpendicular or parallel to the circuit board

is aligned, namely has a conductor insertion direction, either perpendicular to the extension of the

PCB is or parallel to the extension of the

PCB is.

According to a further preferred embodiment, the electrical pressure terminal has no anchor metals or other means beyond the solder connection contacts

Attaching the housing to the circuit board. This means that the absence of anchor metals or other means of attaching the housing to the

Printed circuit board is an essential feature of the invention, thus therefore a so-called negative feature. Because by the saving of anchor metals or other means previously used for attachment of the housing to the

Printed circuit board, the printed circuit terminal according to the invention, on the one hand much easier to manufacture and on the other hand are mounted much less space on the circuit board. It is further provided that the anchor metals are not used for electrical contacting of the print terminal or the terminal.

In principle, the terminal can be configured as desired, although according to a particularly preferred embodiment it is preferred that the terminal with screw connection, with push-in spring connection, with tension spring connection, with push Lock-spring connection or with insulation displacement connection for clamping the conductor is designed. So configured, there are a variety of possible use variations for the electrical print terminal according to the invention.

The object of the invention is further achieved by an electrical PCB assembly, comprising a

electrical print terminal as described above and a printed circuit board, wherein the first solder connection contact is connected to the circuit board in through-hole mounting and the second solder connection contact with the circuit board in

Surface mounting is connected.

Most preferably, the electrical print terminal is designed as an SMD print terminal, so designed as a print terminal with respect to other known from the prior art print terminals very small dimensions and designed accordingly, that the print terminal, at least in terms of their Lötanschlusskontakte in surface mounting, by means of SMD manufacturing the circuit board can be applied. For electrically contacting the solder connection contacts with the printed circuit board or a conductor track of the printed circuit board, the person skilled in the art will use corresponding methods known from the prior art for through-hole mounting and for surface mounting.

The invention will be explained in more detail with reference to the accompanying drawings with reference to preferred embodiments.

Show it 1 shows an electrical pressure terminal according to a

preferred embodiment in one

perspective view from below,

2 shows an electrical pressure terminal according to a further preferred embodiment in one

perspective view from below,

Fig. 3 is an electrical print terminal according to a still

another embodiment in one

perspective view from above, and

4 shows the electrical pressure clamp according to FIG. 3 in a further perspective view from above.

1 to 4 each show an electrical pressure terminal according to the invention in various embodiments with respect to the solder connection contacts 1, 2. The print terminal has five individual adjacent and arranged in series with each other terminals 3, each with a

Spring-loaded connection in direct plug-in technology with

Loosening possibility are designed and have a grid of 2.5 mm. Each terminal 3 has one

Conductor insertion opening 4, a clamping spring for

Clamp the conductor and at least one with the

Clamping spring electrically connected solder terminal contact 1, 2.

As can be seen from FIG. 1, the two outer terminals 3, which enclose the three inner terminals 3, are each designed with two first solder connection contacts 1 for push-through mounting. Specifically, the first solder connection contacts 1 are configured as a THR contact and are by a

Bore a circuit board, not shown, passed through to so-called through-hole mounting, English Through Hole Technology, abbreviated THT, or pin-in-hole technology, abbreviated PIH, with the circuit board or a conductor track of the circuit board by soldering, such as

Conventional hand soldering, wave soldering or selective soldering to be joined.

As can be seen further from FIG. 1, the first solder connection contacts 1 have a rectangular shape

Cross-section, wherein the conductor insertion opening 4 facing first Lötanschlusskontakt 1 with his

Wide side facing the conductor insertion opening 4 and the corresponding from the conductor insertion opening. 4

spaced first solder terminal contact 1 with his

Longitudinal side of the conductor insertion opening 4 facing, that is rotated by 90 ° relative to the other first

Solder terminal contact 1 is arranged.

The three inner clamps 3 have instead of the first

Instead, second solder connection contacts 2 for surface mounting, English Surface Mounted Technology, abbreviated SMT, on. For this purpose, the second solder connection contacts 2 extend configured with solderable pads away from the terminals 3 in one direction, provided that the print terminal is mounted on the circuit board, parallel to

Extension direction of the circuit board. The five terminals 3 are arranged in a common housing 5.

Fig. 2 shows a further embodiment of the print terminal, but all internal terminals 3 with two

Lötanschlusskontakten 1, 2 are configured, namely in addition to the embodiment shown in Fig. 1 via a further first for through-mounting with the

Circuit board designed solder terminal contact 1 have, which is also disposed adjacent to the conductor insertion opening 4, while the second to the second

Surface mount designed solder terminal contact 2 spaced from the conductor insertion opening 4 is arranged.

While in the embodiment shown in Figs. 1 and 2, the conductor is inserted in a direction parallel to the extension of the circuit board in the print terminal, ie in a direction parallel to the extension of the second

Lötanschlusskontaktes 2 is inserted into the terminal 3, Figs. 3 and Fig. 4 show an embodiment in which the conductor in the conductor insertion opening 4 in a

Direction parallel to the extension of the first

Lötanschlusskontaktes 1 is configured. In addition, these embodiments shown in FIGS. 3 and 4 each have two second solder connection contacts 2 designed for surface mounting on their inner terminals 3. It is also possible, in the illustrated embodiments of the outer terminals 3 only one of the first two

Plug contacts 1, 2 to be used for electrical contact between the conductor track and the clamping spring of the terminal 3, and the other first solder connection contact 1 only to

Attachment of the housing 5 to the circuit board to

use.

In addition, arises between the circuit board and the housing 5 of the print terminal and limited by the first

Lötanschlusskontakte 1 of the outer terminals 3 in the region of the support surface 7 of the print terminal on the circuit board another space, referred to in the figures with the

Reference numeral 6 on the circuit board for others

Components can be used. As a result, the invention makes it possible to save armature metals which were previously required to intercept the forces occurring when the terminals 3 are actuated, which were often provided laterally on the housing 5 in the embodiments known from the prior art. These

However, anchor metals need their own, more

Support surface on the PCB, which is not available to other components. In contrast, the maximum

Support surface 7 of the housing 6 limited by the dimensions of the housing 6.

With the invention, it is now possible to save exactly this area, since the designed for through-hole mounting first Lötanschlusskontakten 1 plays a dual role, namely on the one hand for fastening the housing 5 of

Print terminal on the circuit board and on the other hand for electrical contact between the conductor track of the circuit board and a clamping spring of the terminal. 3

LIST OF REFERENCE NUMBERS

First solder connection contact 1

Second solder connection contact 2 terminal 3

Conductor insertion opening 4

Top 5

Bearing surface 7

Claims

claims

1. Electrical pressure terminal for mounting on a printed circuit board, with at least one terminal (3)

having housing (5), wherein

the terminal (3) has a conductor insertion opening (4), a clamping spring for clamping the conductor and at least one electrically connected to the clamping spring

Lötanschlusskontakt (1, 2), and

at least one first solder connection contact (1) to

Through-hole assembly is performed with the circuit board and at least a second solder terminal contact (2) for

Surface mounting is performed with the circuit board.

2. Electrical PCB terminal after the previous one

Claim, wherein the first solder connection contact (1) extends perpendicular to the second solder connection contact (2), the first solder connection contact (1) as a THR contact and / or the second solder connection contact is designed as an SMD contact.

3. Electrical pressure terminal according to one of the preceding claims, wherein the housing (5) has a bearing surface for resting on the printed circuit board, the first

Solder terminal contact (1) extends in a direction perpendicular away from the support surface and the second

Solder terminal contact (2) extends in a direction parallel away from the support surface.

4. Electrical pressure terminal according to one of the preceding claims, wherein the terminal (3) has two through-hole mounting configured first Lötanschlusskontakte (1), the two solder connection contacts (1) each one

have rectangular cross-section and the two Solder terminal contacts (1) twisted to each other

are arranged, that the longitudinal side of the one cross section adjacent to the broad side of the other cross section

is arranged.

5. Electrical pressure terminal according to one of the preceding claims, with at least three in series

arranged terminals (3), wherein the two outer terminals (3) each two spaced and for through-mounting

have configured first solder connection contacts (1) and the inner terminal (3) has a second surface-mounted solder terminal contact (2).

6. Electrical PCB terminal after the previous one

Claim, wherein the inner clamp (3) a single second designed for surface mounting

Lötanschlusskontakt (2), two second designed for surface mounting solder terminals (2) or both designed for surface mounting second

Solder connection contact (2) and a first to

Through-hole designed solder terminal contact (1).

7. Electrical pressure terminal according to one of the preceding claims, wherein the conductor insertion direction in the

Terminal (3) is perpendicular or parallel to the extension direction of the first solder connection contact (1).

8. Electrical pressure terminal according to one of the preceding claims, comprising none of the Lötanschlusskontakte

(1, 2) outgoing anchor metals for mounting the housing (5) on the circuit board.

9. Electrical pressure terminal according to one of the preceding claims, wherein the terminal (3) with screw, with push-in spring connection, with Zugfederanschluss, with push-lock spring connection or with insulation displacement connection for clamping the conductor is configured.

10. An electrical printed circuit board assembly comprising an electrical pressure terminal according to one of the preceding claims and a printed circuit board, wherein the first

Solder connection contact (1) with the circuit board in

Through-hole is connected and the second

Solder connection contact (2) with the PCB in

Surface mounting is connected.