CN107046217B

CN107046217B - Handling tool and kit of a circuit board clamping part and handling tool

Info

Publication number: CN107046217B
Application number: CN201611162285.4A
Authority: CN
Inventors: 亨利·施托尔策; 延斯·布兰德霍斯特
Original assignee: Wago Verwaltungs GmbH
Current assignee: Wago Verwaltungs GmbH
Priority date: 2015-12-21
Filing date: 2016-12-15
Publication date: 2020-02-04
Anticipated expiration: 2036-12-15
Also published as: CN107046217A; DE102015122400B4; DE102015122400A1

Abstract

The invention relates to an actuating tool (1) for opening a clamping point of a circuit board clamping part (6) having a spring contact element with a clamping spring (8) for clamping an electrical conductor (9) at the clamping point. The clamping spring has an actuating section (11) to be force-loaded by an actuating force in order to open the clamping point. The handling tool has a tool head (3) with two spaced-apart side walls (4a, 4b) which delimit a receiving space (5) suitable for receiving a circuit board clamping element. The receiving space is open on the front side for inserting electrical lines and on the underside for introducing the circuit board clamping piece. The tool head has an actuating contour (12) which is designed to apply a force to an actuating section of a clamping spring of the circuit board clamping part when the actuating tool is placed on the circuit board clamping part by means of the tool head.

Description

Handling tool and kit of a circuit board clamping part and handling tool

Technical Field

The invention relates to an actuating tool for opening a clamping point of a circuit board clamping part, which comprises a spring contact element having a clamping spring for clamping an electrical conductor at the clamping point, wherein the clamping spring has an actuating section for applying a force with an actuating force in order to open the clamping point.

The invention further relates to a kit of a circuit board clamp without an insulating housing and such a handling tool.

Background

A spring-force clamping element for clamping an electrical conductor has a clamping spring which forms a clamping point for clamping the electrical conductor. In order to remove the clamped electrical line or, if appropriate, to insert a line, in particular a thin line, the clamping point must be opened. For this purpose, an actuating force is applied to the actuating section of the clamping spring. This can be done by means of a separate actuating tool in the form of a screwdriver or by means of an actuating element, such as a push button, a lever or the like, which is integrated into the insulating material housing of the circuit board clamp.

US 8,328,586B 2 shows an SMD (surface mounted device) circuit board clip for joining to a circuit board, which SMD circuit board clip has a spring contact element with two tongues directed towards each other for clamping electrical conductors and an insulating material housing with an operating button molded thereon.

The circuit board clamping elements applied to the circuit board are usually very delicate and thus problematic to handle. This applies in particular in the following cases: the spring contact element is used without the surrounding insulating material housing.

Disclosure of Invention

The object of the invention is therefore to provide an improved assembly of a circuit board clamp without an insulating material housing and a handling tool, and a handling tool therefor.

The object is achieved by means of an actuating tool for opening a clamping point of a circuit board clamping part and a kit of a circuit board clamping part and an actuating tool without an insulating material housing. Advantageous embodiments are described below.

The handling tool has a tool head with two spaced-apart side walls which define a receiving space suitable for receiving a circuit board clamping element. The spring contact element, which is preferably not surrounded by an insulating material housing, can therefore be actuated by an actuating tool which is provided and designed for actuating a spring contact element of this type. For this purpose, the tool head of the handling tool is placed on the spring contact element such that the spring contact element without the insulating material housing is recessed into the receiving space. The tool head of the spring contact element is therefore an enclosed housing which protects the spring contact element during manipulation for removing or clamping the electrical line. For this purpose, the receiving space is open on the front side for inserting the electrical lines and on the rear side for introducing the circuit board clamping element.

The tool head has an actuating contour which is designed to apply a force to an actuating section of a clamping spring of the circuit board clamping part when the actuating tool is placed on the circuit board by means of its tool head. When the tool head is placed on the circuit board clamping part so that the circuit board clamping part is sunk into the receiving space of the tool head, the actuating contour of the tool head therefore interacts with the actuating section of the clamping spring of the spring contact element so that the clamping point is opened in this case.

Such an actuating tool, which is associated with a spring contact element of a specific type, is therefore used not only to open the clamping point, as with a screwdriver, but also to provide a guide by means of the side walls and their receiving space, by means of which the actuating contour interacts with the actuating section. Furthermore, the tool head serves as a housing which temporarily at least partially encloses the circuit board clamping element and thus protects it.

The tool head can have an end stop surface for resting against a circuit board clamping element accommodated in the receiving space or against a circuit board carrying the circuit board clamping element. The end stop surface is matched to the actuating contour in such a way that it stops against the circuit board clamping part or the circuit board when the clamping point is opened. Thus, overloading of the spring contact element is reliably prevented. The end stop surface can be formed, for example, by a foot of the lower edge or of the side wall, which cooperates with the plane of the soldered connection surface of the spring contact element and thus with the supporting plane of the circuit board carrying the spring contact element. Thus, if the tool head is placed against the printed circuit board by means of the end stop surface, the clamping point is opened in a reliable range by means of the actuating contour, without overloading the clamping spring in this case.

However, it is also conceivable for the end stop to be formed, for example, by the inner side of a top wall of the connecting side wall of the tool head, said top wall then abutting against the upper side of the spring contact element which is sunk into the receiving space. The actuating contour of the tool head is also adapted to the type of arrangement of the stop surface and the spring contact element for which the actuating tool is provided.

The actuating contour can have an opening in the side wall for receiving an actuating tab of the clamping spring. Such an actuating tab projecting from the clamping spring can thus be inserted into this opening in the side wall when the spring contact element is introduced into the receiving space. The actuating tab thus rests against the edge delimiting the opening in order to be displaced in the manner described to open the clamping point when the tool head is placed on the circuit board clamping part.

However, it is also conceivable for the actuating contour to have an actuating projection which projects from an inner wall in the receiving space and which, when the circuit board clamping element is introduced into the receiving space, comes into contact with an actuating section of the clamping spring in order to apply an actuating force to said actuating section.

In this case, the receiving space also provides a guide for the circuit board clamping part, which guide causes the actuating contour to interact with the actuating section of the clamping spring when the tool head is placed on the circuit board clamping part and the circuit board is introduced into the receiving space.

The tool head can have a wire insertion opening on the front side, which is located in front of the receiving space for the circuit board clamping element. Thus, an additional wire lead-in opening is provided beyond the wire lead-in channel in the circuit board clamping part and in front of the circuit board clamping part, said wire lead-in opening facilitating the introduction of an electrical wire into the circuit board clamping part towards the clamping point. The tool head thus forms a housing, preferably made of insulating material, which can subsequently be removed again from the circuit board clamping part after clamping the electrical line. In this case, the line insertion opening is open at the bottom, i.e., is formed in a trough shape.

The wire insertion opening can have a wire insertion wall which tapers funnel-shaped toward the receiving space, i.e. runs toward one another. It is therefore very easy to insert the electrical leads from the larger outlet opening into the relatively small, smaller inlet opening, which is aligned with the spring contact element and its lead-in channel.

The receiving space can have a rear side wall connecting the side walls on its rear side opposite the opening of the front side. Thus, additional guidance and determination of the desired position of the spring contact element accommodated in the accommodating space are provided not only by means of the side walls, but also by means of the rear side. In addition, the side walls are stabilized.

The handle is capable of extending from the tool head. However, it is also conceivable for the tool head to be part of a handling robot which is designed to clamp the electrical lines to the circuit board clamping elements, in particular in the soldered state to the circuit board.

The handle can extend on a plane which is oriented transversely to the longitudinal extension of the receiving space and perpendicular to the plane of the lower opening of the receiving space, which is provided for inserting the circuit board clamping part. Since the handle is thus erected transversely to the wire insertion direction, the space required for inserting the electrical wire remains free of the handle and the wire insertion opening or the wire insertion channel remains well visible.

Drawings

The invention is explained in detail below on the basis of exemplary embodiments with the aid of the figures. The figures show:

fig. 1 shows a perspective view of a first embodiment of a handling tool in the state of being inserted onto a circuit board clamping part;

fig. 2 shows a perspective partial view of the handling tool from fig. 1 in the region of a circuit board clamping element;

FIG. 3 shows a partial perspective partial section view of the manipulation tool of FIG. 2;

fig. 4 shows a perspective view of the tool head of the manipulation tool of fig. 1 to 3 obliquely from below;

FIG. 5 shows a perspective view of the tool head of FIG. 4 with a circuit board clamping member sunk into the receiving space;

fig. 6 shows a perspective view of the second embodiment of the handling tool in a state in which it is placed on the circuit board clamping part;

fig. 7 shows a perspective partial view of the manipulation tool of fig. 6 in the region of the tool head;

FIG. 8 shows a perspective partial cross-sectional view of the tool head of FIG. 7;

fig. 9 shows a perspective view of the tool head of the manipulation tool of fig. 6 to 8 from below;

fig. 10 shows a perspective view of the tool head from below in fig. 9 with a circuit board clamping element sunk therein;

fig. 11 is a perspective view showing the third embodiment in a state where the manipulation tool is placed on the circuit board;

fig. 12 shows a perspective partial view of the manipulation tool of fig. 11 in the region of the tool head;

FIG. 13 shows a perspective partial cross-sectional view of the tool head of FIG. 12;

fig. 14 shows a perspective view of the manipulation tool with the tool head obliquely from below;

fig. 15 shows a perspective view of the tool head of fig. 14 with a circuit board clamping element accommodated in the accommodation space.

Detailed Description

Fig. 1 shows a perspective view of a first embodiment of a handling tool 1 having a handle 2 and a tool head 3 on the lower end of the handle 2. The tool head 3 has two

opposite side walls

4a, 4b spaced apart from one another, which delimit a receiving space 5 for receiving a circuit board clamping element 6. The circuit board clamping part 6 is designed as an SMD circuit board clamping part for soldering to a circuit board 7 and has a clamping spring 8. By means of the clamping spring 8, the electrical line 9 can be clamped to the clamping point formed by the clamping spring 8. For this purpose, a clamping edge, for example on a clamping leg of the clamping spring 8, applies a clamping force to the stripped end of the electrical line 9 in order to press it against the clamping edge or against the clamping section of the bus bar 10.

Now, in order to pull the electrical lines 9 out of the circuit board clamping part 6, the clamping points must be opened. For this purpose, the clamping spring 8 must be acted upon by an actuating force, as shown, so that the clamping leg is pressed downward. This is done by means of the handling tool 1 and its tool head 3. An actuating contour is formed on the tool head 3, which contour interacts with an actuating section 11 of the clamping spring 8. In the embodiment shown, the actuating contour is formed as an opening 12 in the side wall 4 b. It is clear that the actuating section 11 of the clamping spring 8 is recessed into the opening 12 and rests against an upper edge which delimits the opening 12 in the side wall 4 b. The actuating section 11 is designed as a tab projecting laterally from the spring leg of the clamping spring 8. Now, when the tool head 3 is placed or inserted onto the circuit board clamping part 6 and the circuit board clamping part 6 is lowered into the receiving space 5, the actuating section 11 is then pushed downward by the upper edge of the opening 12 in the direction of the support leg or the circuit board 7, i.e. in the insertion direction S of the actuating tool 1, in order to open the clamping point. The stripped end of the electrical line 9 is thus released and can be pulled out of the circuit board clamping part 6.

This opening of the clamping points is also suitable in particular for the wires of the threads when the electrical line 9 is inserted into the circuit board clamping part 6, in order to prevent the strands of the threads of the electrical line 9 from being twisted.

It can be seen that in the shown, open position of the clamping point, the

side walls

4a, 4b rest with their lower edges 13 on the soldering top side of the circuit board 7. As a result, the actuating tool 1 is prevented from further pressing down on the circuit board clamping part 6 located in the receiving space 5, and overloading of the clamping spring 8 is reliably prevented.

Furthermore, it can be seen that the handle 2 of the actuating tool 1 is formed in the form of a plate and extends in the transverse direction E and in the plugging direction S, i.e. perpendicularly to the plane of the circuit board 7 and perpendicularly to the corresponding plane of the lower opening of the receiving space 5, in a plane which is transverse to the wire insertion direction L and to the longitudinal extension direction of the circuit board clamping piece 6 which corresponds thereto and to the extension direction of the

side walls

4a, 4b and of the receiving space 5 formed thereby, through which the circuit board clamping piece 6 is introduced into the receiving space 5. Thus, during handling, the conductor insertion channels 14 of the circuit board clamping part 6 remain visible, in order to introduce the stripped ends of the electrical conductors 9 into said conductor insertion channels 14.

Fig. 2 shows a perspective partial view of the manipulation tool 1 in fig. 1 in the region of the tool head 3. In this case, it is again more clear that the tool head 3 is inserted onto a circuit board clamping part 6 to be actuated, which is sunk into a receiving space 5 laterally delimited by the

side walls

4a, 4 b. The distance between the

side walls

4a, 4b is adapted to the width of the associated circuit board clamping part 6, for which the actuating tool 1 is designed to actuate. This ensures lateral guidance of the tool bit 3 on the circuit board clamping part 6, so that the actuating section 11 is recessed into the opening 12 of the side wall 4 b. The actuating contour of the tool head 3 is therefore adapted to the actuating section 11 of the circuit board clamping part 6, wherein the receiving space 5 of the tool head 3 cooperates with the associated circuit board clamping part 6, so that the actuating section 11 is reliably acted upon by force when the actuating tool 1 is inserted onto the circuit board clamping part 6.

It is clear that the tool head 3 rests with its lower edge 13 on the soldering top side of the circuit board 7 in the maximum permissible operating state shown.

Fig. 3 shows a perspective partial section of the manipulation tool 1 in fig. 2 in the region of the tool head 3. It is clear that the clamping spring 8 is formed as a U-shaped bent yoke spring with a bearing leg 15 resting against the cage-like bus bar 10 and an opposite clamping leg 16. The freely movable ends of the clamping legs 16 have clamping edges which exert a clamping force on the stripped ends of the electrical conductors 9 in order to clamp them completely against the bus bar 10 or against projecting clamping edges on the bus bar 10. The support leg 15 and the clamping leg 16 are connected to one another via a spring bracket 17.

It can also be seen that the cage-like bus bar 10 has a transverse wall 18 on the rear side, by means of which the insertion path of the electrical lines 9 into the circuit board clamping part 6 is delimited.

The receiving space 5 of the tool head 3 is delimited by the top wall 19 opposite a lower opening provided for introducing the circuit board clamping element 6 into the receiving space 5. In the open position shown, the top wall can be supported on the upper side of the circuit board clamping part 6, in order to thus form an end stop, in order to prevent the clamping leg 16 from being pressed further downward via the actuating section 11 and thus to prevent an overload of the clamping spring 8.

Fig. 4 shows a partial perspective view of the handling tool 1 from below, tilted with respect to the tool head 3. It is clear that in the lower region there are openings 12 in the two

side walls

4a, 4b, respectively. The

side walls

4a, 4b are therefore provided opposite the handle 2 with recesses, which are each delimited by two feet 20. The free ends of the feet 20 form end stop surfaces which bear against the circuit board when the handling tool 1 is inserted in the most permissible manner onto the circuit board clamping part 6, in order not to overload the clamping spring 8 when the clamping point is opened.

It is also clear that the receiving channel 5 delimited by the

side walls

4a, 4b is open both on the front side and also on the rear side. The receiving channel 5 is therefore only bounded by the

side walls

4a, 4b and the top wall 19 of the tool head 3. This forms a groove which opens downwardly opposite the handle 2. As long as openings 12 are provided in both

side walls

4a, 4b, orientation-independent positioning of the handling tool 1 is possible in the exemplary embodiment.

Fig. 5 shows a perspective view of the handling tool 1 from fig. 4, which has a circuit board clamping part 6, which is introduced into the receiving space 5. The circuit board clamping part 6 extends along the inner faces of the

side walls

4a, 4b in the longitudinal extension direction of the receiving space 5. The handle 2 is oriented here transversely to the direction of extent of the inserted circuit board clip 6 and, in addition, extends upward perpendicularly to the plane of the lower opening of the circuit board clip 6 or of the receiving space 5.

Fig. 6 shows a second exemplary embodiment of a handling tool 1, which in turn has a handle 2 and a tool head 3 on the lower end of the handle 2. The design of the tool head 3 is made more clear by means of the detail in fig. 7.

A receiving space 5 for receiving a circuit board clamping part 6 is provided, which is delimited by two

side walls

4a, 4b opposite each other. The two side walls are longer in the longitudinal direction, i.e. in the wire insertion direction L, than in the plugging direction S. In this case, a conductor insertion opening 21 is provided upstream of the receiving space 5 of the received circuit board clamping part 6. The conductor insertion openings are open toward the circuit board 7 and are likewise embodied in a groove-like manner. The conductor insertion opening 21 has a conductor insertion wall tapering funnel-shaped toward the receiving space 5, by means of which the electrical conductors are guided to the conductor insertion channels 14 of the circuit board clamping part 6.

In turn, an actuating contour, for example in the form of an opening 12, is present on at least one side wall 4b, the actuating section 11 of the circuit board clamping part 6 resting on the edge of said actuating contour in order to open the clamping point when the actuating tool 1 is inserted onto the circuit board clamping part 6.

The handle 2 extends in a plane once along a transverse direction E, which is transverse to the wire insertion direction L and to the longitudinal extension direction of the

side walls

4a, 4b of the tool head 3, and perpendicular to the plane of the circuit board 7 and to the plane which opens out through the lower opening of the receiving space 5. Thus, the handle 2 is rotated at a certain angle with respect to the extending direction of the tool head 3. The angle is preferably 90 °.

The handle 2 is thus formed, for example, from a plastic material in one piece with the tool head 3, wherein an additional support web 22 can be present in the transition of the handle 2 to the tool head 3.

Fig. 8 can be seen in a partial section through the manipulation tool 1 in fig. 6 and 7. It is clear that the tool head 3 rests with its lower edge 13 on the soldering top side of the circuit board 7 in the maximum permissible operating state shown. The circuit board clamping part 6 soldered to the circuit board is accommodated in an accommodation space 5 of the tool head 3, which is delimited by the

side walls

4a, 4b, on the upper side by a top wall 19 and on the rear side by a rear wall 23, which connects the

side walls

4a, 4b and the top wall 19.

It can be seen that the receiving space 5 is open not only in the opposite direction to the handle 2 for the introduction of the circuit board clamping element 6. More precisely, a line insertion opening 21 is provided upstream of the receiving space 5, which line insertion opening has, for example, a line guide wall tapering in a funnel-like manner toward the receiving space 5. The receiving space 5 is delimited laterally, on the front side and on the rear side in such a way that a circuit board clamping part 6 of the type for which the handling tool 1 is designed is inserted into the receiving space 5 in a desired position. The actuating contour of the tool head 3 is therefore guided to the actuating section of the circuit board clamping part 6 in order to open the clamping point of the circuit board clamping part 6 in order to clamp or remove the electrical line 9.

For the construction of the circuit board clamping part 6, reference can be made essentially to the first exemplary embodiment.

Fig. 9 shows a perspective view of the handling tool 1 from below, tilted with respect to the tool head 3. It is clear here that a concave opening 12 is present on the side wall 4b, which opening forms the actuating contour and enables the actuating section of the clamping spring 8 to be lowered into the opening 12.

It can also be seen that the receiving space 5 delimited by the

side walls

4a, 4b and the rear side wall 23 transverse thereto is provided with a conductor insertion opening 21 having conductor guide walls which extend towards the receiving space 5 towards one another. The receiving space 5 is therefore partially also delimited on the front side opposite the rear side wall 23 by the conductor insertion opening 21 by means of the conductor guide wall forming a delimiting connection. On the inner faces of the

side walls

4a, 4b and, if appropriate, also on the rear wall 23, additional guide grooves 24 or guide webs can be present which match the edge contour of the associated circuit board clip 6 and ensure that the circuit board clip 6 is introduced into the receiving space 5 in a defined position.

Fig. 10 shows a perspective view of the handling tool 1 from below with respect to the tool head 3 in fig. 9, with the circuit board clamping part 6 inserted into the receiving space 5. It is clear that a wire introduction opening 21 is located in front of the circuit board clamping part 6, said wire introduction opening having wire guide walls extending funnel-shaped towards each other. The conductor insertion opening 21 is likewise open toward the underside, as is the receiving space 5, so that the handling tool 1 can be pulled out of the circuit board clamping part 6 after the electrical conductor has been clamped to the circuit board clamping part 6.

The distance between the

side walls

4a, 4b and the distance between the front wire insertion opening 21 and the rear side wall 23 is adapted to the dimensions of the circuit board clamping part 6, so that it can be inserted into the receiving space 5 in a defined position in a matched manner. The handling tool 1 is therefore structurally matched to the particular type of circuit board clamping element 6. In this case, not only the receiving space 5 is adapted to the associated circuit board clamping part 6, but also the actuating contour of the tool head 3, for example in the form of an opening 12, which interacts with the actuating section of the circuit board clamping part 6 when the circuit board clamping part 6 is lowered into the receiving space 5, is adapted to the associated circuit board clamping part.

Fig. 11 shows a third embodiment of the handling tool 1 for opening the clamping point of the circuit board clamping part 6. The construction of the tool head 3 corresponds to the second embodiment, so that reference can be made to the description of fig. 6 to 10 therein. In contrast to this, in this embodiment, the handle 2 is not oriented transversely to the longitudinal extension direction of the tool head 3 and to the wire insertion direction L. More precisely, the handle 2 extends in a plane which, on the one hand, runs along the plugging direction S, i.e. perpendicular to the face of the circuit board 7, and, on the other hand, runs along an extension direction E parallel to the wire insertion direction L. Thus, the width of the handle 2 is oriented in the wire insertion direction L and in the longitudinal direction of the tool head 3. In contrast to the second exemplary embodiment, the line insertion opening 21 is enlarged here in that: the

side walls

4a, 4b extend obliquely outward, away from each other, in the direction of the wire introduction opening 21. The enlarged lead-through opening 21 facilitates the insertion of the electrical leads 9, since in this way, for example, greater tolerances can be compensated for when mounting the circuit board clamp 6 on the circuit board 7.

This is made more clear by means of the partial sectional view in fig. 12. It can be seen that the handle 2 merges into the tool head 3 on the upper side thereof, so that the narrow side of the handle 2 opens into the tool head 3 in the region of the wire insertion opening 21 (above it) and adjacent to the rear side wall 23.

It can be seen that the actuating section 11 of the circuit board clamping part 6 in the form of a tab is recessed into the concave opening 12 of the side wall 4 b.

Fig. 13 shows a perspective partial section through the manipulation tool 1 from fig. 12 in the region of the tool head 3. In addition to the orientation of the handle 2, reference can basically be made to the description of fig. 8 and to the description of fig. 3 with regard to the design of the circuit board clamping part 6.

Fig. 14 shows a perspective view of the manipulation tool 1 in fig. 11 to 13 from below, with the tool head 3 tilted. Here, it is again clear that only concave openings 12 are introduced on the side wall 4b to form the handling contour. It is also clear that the wire introduction opening 21 is located in front of the accommodation space 5 bounded by the

side walls

4a, 4b and the rear side wall 23 and by the top wall 19. The wire introduction openings are formed by wire guide walls which are bent in a U-shape and run funnel-shaped toward each other. By tapering the wire insertion opening 21, the receiving space 5 is also partially delimited on the front side opposite the rear wall 23 in order to form a guide web there for inserting the circuit board clamping part 6.

Fig. 15 shows a perspective view of the handling tool 1 in fig. 14 with the circuit board clamping element 6 accommodated in the accommodating space 5. It is again evident that the plate-shaped handle 2 is oriented in the longitudinal extension direction of the circuit board clamping part 6 and the associated receiving space 5 and thus in the predetermined conductor insertion direction L.

The embodiments of the handle 2 and of the tool head 3 shown in the examples can also be combined with one another in other different types and ways.

Claims

1. A handling tool (1) for opening a clamping point of a circuit board clamping part (6) having a spring contact element with a clamping spring (8) for clamping an electrical conductor at the clamping point,

wherein the clamping spring (8) has an actuating section (11) to be force-loaded by means of an actuating force in order to open the clamping point,

it is characterized in that the preparation method is characterized in that,

the handling tool (1) has a tool head (3) which has two spaced-apart side walls (4a, 4b) which bound an accommodating space (5) which is suitable for accommodating a circuit board clamping element (6), wherein the accommodating space (5) is open on the front side for inserting electrical lines and on the underside for introducing the circuit board clamping element (6), and wherein the tool head (3) has a handling contour (12) which is designed to apply a force to the handling section (11) of the clamping spring (8) of the circuit board clamping element (6) when the handling tool (1) is placed on the circuit board clamping element (6) by means of its tool head (3).

2. Handling tool (1) according to claim 1,

it is characterized in that the preparation method is characterized in that,

the tool head (3) has an end stop surface for resting against a circuit board clamping part (6) accommodated in the accommodation space (5) or against a circuit board (7) carrying the circuit board clamping part (6), wherein the end stop surface is matched to the actuating contour (12) in such a way that the end stop surface stops against the circuit board clamping part (6) or the circuit board (7) when the clamping point is open.

3. Handling tool (1) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the actuating contour (12) is an opening in the side wall (4a, 4b) for receiving an actuating section (11) of the clamping spring (8).

4. Handling tool (1) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the actuating contour (12) has an actuating projection which projects from the inner wall of the receiving space (5).

5. Handling tool (1) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the tool head (3) has a wire insertion opening (21) on the front side, which is located in front of the receiving space (5) for the circuit board clamping part (6).

6. Handling tool (1) according to claim 5,

it is characterized in that the preparation method is characterized in that,

the wire introduction opening (21) has a wire introduction wall tapering funnel-shaped towards the receiving space (5).

7. Handling tool (1) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the receiving space (5) has a rear side wall (23) on its rear side opposite the front opening, which rear side wall connects the side walls (4a, 4 b).

8. Handling tool (1) according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

a handle (2) extends from the tool head (3).

9. Handling tool (1) according to claim 8,

it is characterized in that the preparation method is characterized in that,

the handle (2) extends in a plane which is oriented transversely to the longitudinal extension of the receiving space (5) and perpendicular to the plane of the lower opening of the receiving space (5) which is provided for inserting a circuit board clamping part (6).

10. A set of a circuit board clamp (6) without an insulating material housing and an actuating tool (1) according to one of the preceding claims, wherein the circuit board clamp (6) has a spring contact element with a clamping spring (8) for clamping an electrical conductor at a clamping point, and wherein the clamping spring (8) has an actuating section (11) to be force-loaded by means of an actuating force in order to open the clamping point,

it is characterized in that the preparation method is characterized in that,

the handling tool (1) has a tool head (3) which has two spaced-apart side walls (4a, 4b) which bound an accommodating space (5) which is suitable for accommodating the circuit board clamping part (6), wherein the accommodating space (5) is open on the front side for inserting electrical lines and on the underside for introducing the circuit board clamping part (6), and wherein the tool head (3) has a handling contour (12) which is designed to apply a force to the handling section (11) of the clamping spring (8) of the circuit board clamping part (6) when the handling tool (1) is placed on the circuit board clamping part (6) by means of its tool head (3).

11. Use of a handling tool (1) according to one of claims 1 to 9 for opening a clamping point of a circuit board clamping part (6) arranged on a circuit board, by: the tool head (3) of the handling tool (1) is placed on a spring contact element of the circuit board clamping part (6) in such a way that the spring contact element is recessed into a receiving space (5) of the handling tool (1).

12. Use according to claim 11, characterized in that the tool head (3) forms a housing surrounding the spring contact element during the actuation of the actuation section (11) of the clamping spring (8).

13. Method for opening a clamping point of a circuit board clamping part (6) arranged on a circuit board, having a spring contact element with a clamping spring (8) for clamping an electrical conductor at the clamping point, wherein the clamping spring (8) has an actuating section (11) to be force-loaded by an actuating force in order to open the clamping point, wherein a tool head (3) of an actuating tool (1) according to one of claims 1 to 9 is placed on the spring contact element in such a way that the spring contact element sinks into a receiving space (5) of the actuating tool (1).

14. Method according to claim 13, characterized in that during the actuation of the actuation section (11) of the clamping spring (8), the tool head (3) forms a housing which encloses the spring contact element.