Safety test probe

Abstract

Safety test probe (1) for testing electrical signals on electrical components (6), having the following features: a) at least one test contact (20) for electrically contacting an electrical component (6) to be tested with the safety test probe (1), b) at least one test contact section (2) electrically insulated by insulating material (29), in which the test contact (20) is at least partially arranged and from which the test contact (20) protrudes with a tip (21), c) at least one handling section (3) electrically insulated by insulating material (39), d) at least one electrically accessible connecting contact (30) from the handling section (3) for electrically connecting the safety test probe (1) to an electrical test device, wherein the connecting contact (30) is electrically connected to the test contact (20), e) at least one skirt (5) arranged between the handling section (3) and the tip (21) of the test contact (20), projecting beyond the insulating material (39) of the handling section (3) on its outer circumference to form an obstacle, characterized by the following feature f): f) the longitudinal axis (28) of the test contact (20) is not aligned with the longitudinal axis (38) of the connecting contact (30).

Description

[0001] The invention relates to a safety test probe for testing electrical signals on electrical components, with the following features: a) at least one test contact for electrically contacting an electrical component to be tested with the safety test probe, b) at least one electrically insulated test contact section in which the test contact is at least partially arranged and from which the test contact protrudes with a tip, c) at least one handling section electrically insulated by insulating material, d) at least one electrically accessible connecting contact from the handling section for electrically connecting the safety test probe to an electrical test device, wherein the connecting contact is electrically connected to the test contact, e) at least one skirt arranged between the handling section and the tip of the test contact, projecting beyond the insulating material of the handling section on the outer circumference to form an obstacle.

[0002] Test probes of the aforementioned type are generally known in electrical measurement technology, e.g., as components of connecting cables for multimeters or oscilloscopes. A test probe is disclosed, for example, in EP 2 211 188 B1. An adapter for a probe head for measuring a differential signal is known from DE 10 2012 205 352 A1. Contact pins for manufacturing connectors or for insertion into a printed circuit board are known from DE 40 37 812 A1. A connection device for measuring cables is known from DE 33 35 788 A1.

[0003] The invention is based on the objective of providing a test probe which, with high safety for the user, is particularly suitable for testing electrical signals on electrical installation equipment, e.g. installations with terminal blocks.

[0004] This task is solved for the aforementioned safety test probe by one or both of the following features f), g): f) the longitudinal axis of the test contact is not aligned with the longitudinal axis of the connecting contact, g) the apron only partially surrounds the outer circumference of the safety test tip.

[0005] The test probe according to the invention can be classified as a safety test probe because it offers a high level of user safety. In particular, the safety test probe meets the requirements of the standard DIN EN 61010-031 "Safety requirements for handheld measuring equipment". Advantageously, the safety test probe has an electrically insulated test contact section and an electrically insulated handling section. The user can hold the safety test probe in an electrically secure manner at the electrically insulated handling section. Furthermore, the aforementioned protruding skirt is present, which forms a barrier within the meaning of DIN EN 61010-031. Such a barrier is defined as a part that provides protection against direct contact from all common access directions.

[0006] The apron is designed to protrude beyond the insulating material of the handling section on the outer circumference of the safety test probe. The apron does not necessarily have to be located within the handling section; what is essential is that it protrudes radially beyond the insulating material of the handling section, so that a user cannot accidentally slip from the handling section into the test contact section when pressing the safety test probe against an electrical component under test.

[0007] The invention enables the safety test probe to be used in a particularly suitable manner to test electrical installation equipment, especially closely spaced terminal blocks, in a particularly effective and convenient way. Such terminal blocks typically have test openings designed for inserting a test probe. If necessary, the jumper openings of a terminal block intended for inserting a jumper can also be used as test openings. Since terminal blocks are relatively slim and narrow to save space, the test openings of adjacent terminals are correspondingly close together. This makes it difficult to test several adjacent terminal blocks simultaneously with conventional test probes, as they cannot be fitted with test probes at the same time for mechanical reasons.

[0008] This is simplified by the invention in that the longitudinal axis of the test contact is not aligned with the longitudinal axis of the connection contact and / or in that the skirt only partially surrounds the outer circumference of the safety test probe. Each of these measures allows for a higher packing density when connecting safety test probes to adjacent terminal blocks.

[0009] By definition, two axes are only aligned if there is no radial or angular offset between them. Accordingly, one axis then lies exactly on the extension of the other axis.

[0010] The safety test probe can have a transition section located between the handling section and the test contact section. The skirt can be located, for example, in the handling section, in the transition section, or at a point in the transition between the handling and transition sections. Accordingly, the skirt either surrounds the outer circumference of the handling section, the outer circumference of the transition section, or the transition point between the handling and transition sections. The outer contour of the skirt can be of any shape, for example, rectangular, possibly with rounded corners, or round or oval.

[0011] According to an advantageous embodiment of the invention, the skirt is designed to surround the outer circumference of the safety test probe in a semicircular shape. This allows the skirt to be kept relatively small in size, resulting in a compact safety test probe.

[0012] According to an advantageous embodiment of the invention, the safety test probe has a straight, bounding edge in the circumferential area not enclosed by the apron. This further improves the possibility of closely spaced safety test probes when test openings of terminal blocks are located close together.

[0013] According to an advantageous embodiment of the invention, the straight boundary edge is tangent to the outer circumference of the safety test probe. This further improves the possibility of closely spaced safety test probes when the test openings of terminal blocks are located close together. The boundary edge can, for example, be tangent to the outer circumference of the handling section, the transition section, or the transition point between the handling section and the transition section.

[0014] The handling section can, in principle, have any shape as its outer cross-sectional contour. It is particularly advantageous if the handling section has a circular outer cross-sectional contour, at least partially or entirely. This allows for convenient handling of the safety test probe by the user.

[0015] According to an advantageous embodiment of the invention, the longitudinal axis of the test contact is parallel to the longitudinal axis of the connection contact. Accordingly, a transverse offset (radial offset) exists between the longitudinal axis of the test contact and the longitudinal axis of the connection contact. Consequently, safety test probes positioned side-by-side in terminal blocks can be arranged parallel to each other, which is also advantageous for high packing density.

[0016] According to an advantageous embodiment of the invention, the safety test probe has a transition section in which the test contact is connected to the connecting contact by a bridge section that spans a transverse offset to the connecting contact. The bridge section thus establishes the electrical connection between the test contact and the connecting contact. The bridge section can, for example, be designed as an angled portion of the test contact and / or an angled portion of the connecting contact, or as a separate transverse connecting component.

[0017] According to an advantageous embodiment of the invention, the bridge area is electrically insulated by insulating material of the transition section. This ensures a high level of safety for the safety test probe in this area as well.

[0018] According to an advantageous embodiment of the invention, the bridge area is designed to extend substantially perpendicular to the longitudinal axis of the test contact and / or the longitudinal axis of the connection contact over the majority of its longitudinal extent. In this way, the transverse offset to be bridged by the bridge area can be overcome with minimal material expenditure.

[0019] According to an advantageous embodiment of the invention, the bridge section is designed as a component with at least two angled angles. This allows a transverse offset between the connecting contact and the test contact to be bridged in two spatial dimensions, i.e., in the x-direction and the y-direction. With a safety test probe designed in this way, an even higher packing density of the safety test probes can be achieved when inserted into adjacent test or bridge openings of terminal blocks. It becomes possible to use more than four safety test probes in adjacent terminal blocks.

[0020] In this way, a contact insert of the safety test tip can be realized that is doubly angled in two perpendicular spatial directions.

[0021] According to an advantageous embodiment of the invention, the bridge area, starting from a central area, has at least one first angled section projecting from the central area over an arc area and at least one second angled section projecting from the central area over an arc area, wherein the first angled section projects from the central area in a direction extending away from the second angled section.

[0022] According to an advantageous embodiment of the invention, the test contact has a rectangular cross-sectional shape over the majority of its longitudinal extent, in particular a flat rectangular cross-sectional shape. For example, the material width of the test contact can be at least three times the material thickness, or at least five times the material thickness.

[0023] According to an advantageous embodiment of the invention, the tip of the test contact comprises an arrangement of at least two substantially parallel transverse ribs and at least two or at least three longitudinal ribs connecting the transverse ribs, between which spaces are formed. In this way, a safety test tip with a corresponding test contact tip, specifically adapted to the contacting requirements of terminal blocks, can be provided.

[0024] According to an advantageous embodiment of the invention, one, several, or all of the longitudinal webs are curved. In particular, adjacent longitudinal webs can be convexly curved relative to each other. This further improves the contact possibilities of the safety test probe on terminal blocks.

[0025] The contact insert of the safety test probe, which includes at least the test contact, the bridge area, and the connecting contact, can be implemented, for example, as a single-piece contact, i.e., as a one-piece metal part. This combines high robustness of the safety test probe with good electrical transmission characteristics.

[0026] According to an advantageous embodiment of the invention, an outer edge of the transition section forms an additional obstacle for the safety test tip. This has the advantage that the obstacle function of the circumferential area not surrounded by the skirt can be at least partially compensated for by the outer edge, without an additional component and without the additional installation space that would be required for this purpose.

[0027] According to an advantageous embodiment of the invention, the apron is arranged in the transition area at the safety test tip. This allows for an ergonomically favorable placement of the apron, enabling it to fully fulfill its safety function as an obstacle.

[0028] According to an advantageous embodiment of the invention, the connecting contact is designed as a socket contact arranged in the handling section and surrounded by the insulating material of the handling section. This has the advantage that the safety test probe itself can be designed to be relatively small and compact and does not require a permanently attached connecting cable. The socket contact can, for example, be designed in the form of a counterpart to a banana plug or a standard plug. In this way, a test lead connecting the safety test probe to a test device can be connected to the safety test probe quickly and easily.

[0029] According to an advantageous embodiment of the invention, the skirt has a longitudinal offset along its course around the circumference of the safety test probe. This further improves the achievable packing density when safety test probes are arranged close together in closely adjacent test openings of terminal blocks. The adjacent safety test probes can thus be nested within one another and their skirts can overlap. The skirt, or the skirt offset, can be implemented, for example, by spiraling around the circumference of the safety test probe. Alternatively, the skirt can be formed in two offset, parallel planes, between which the longitudinal offset is present.

[0030] According to an advantageous embodiment of the invention, the offset of the apron is at least as large as the material thickness of the apron. This has the advantage that, with appropriate arrangement of adjacent safety test tips, they can be positioned so close together that the apron of one safety test tip overlaps with the apron of the adjacent safety test tip.

[0031] According to an advantageous embodiment of the invention, the skirt comprises at least one first circumferential section and at least one second circumferential section, the second circumferential section being offset from the first circumferential section in the axial direction of the safety test tip. The first and second circumferential sections may run parallel to each other or in another manner. The skirt may have a gap between the first and second circumferential sections.

[0032] According to an advantageous embodiment of the invention, the first circumferential section is connected to the second circumferential section of the apron via a connecting apron section that extends at least partially in the axial direction of the safety test tip. This has the advantage that the aforementioned gap between the first and second circumferential sections is eliminated, so that a continuous apron made of the same material can be achieved despite the offset. This further increases safety for the user. In addition, the apron exhibits increased mechanical robustness. The connecting apron section can, for example, be designed as an inclined ramp or as a step-like ledge.

[0033] According to an advantageous embodiment of the invention, the test contact section has at least partially or completely an outer cross-sectional contour that is rectangular or rectangular with rounded corners. In this context, a square shape, which is a special case of a rectangular shape, is also considered rectangular. Such an outer cross-sectional contour further improves the suitability of the safety test probe for testing electrical installations, particularly terminal blocks. These terminal blocks often have test openings with a rectangular or square inner contour. Accordingly, the safety test probe, with its test contact section, fits well into the contour of such a test opening. Furthermore, this prevents the user from accidentally inserting the safety test probe, for example, into a conductor entry opening of the terminal block.

[0034] The invention is explained in more detail below with reference to exemplary embodiments and drawings.

[0035] They show Fig. 1 a safety test probe in perspective view and Fig. 2 to 4 the safety test probe according to Fig. 1 in different side views and Fig. 5 the safety test probe according to Fig. 1 in a top view of the handling section and Fig. 6 a sectional view of the safety test probe according to the in Fig. 2 shown section line A - A and Fig. 7 a sectional view of the safety test probe according to the in Fig. 3 shown section line B - B and Fig. 8 a terminal block with inserted safety test probe in lateral sectional view and Fig. 9 a close-up from Fig. 8 and Fig. 10 arrangements of terminal blocks with safety test probes inserted therein in perspective view and Fig. 11 the orders according to Fig. 10 in a top view of the handling sections of the safety test probes and the corresponding conductor entry openings and test openings of the terminal blocks and Fig. 12 a further embodiment of a safety test probe in perspective view and Fig. 13 to 16 the safety test probe according to Fig. 12 in different side views and Fig. 17 a sectional view of the safety test probe according to the in Fig. 16 shown section line B - B and Fig. 18 a sectional view of the safety test probe according to the in Fig. 15 shown section line H - H and Fig. 19 the safety test probe according to Fig. 12 in a top view of the handling section and Fig. 20 a sectional view of the safety test probe according to the in Fig. 14 section line C - C shown and Fig. 21 a view of the contact insert of the safety test probe according to Fig. 12 in a direction of view towards the tip of the test contact and Fig. 22 a sectional view of the safety test probe according to the in Fig. 13 shown section line G - G and Fig. 23 the contact insertion of the safety test probe according to Fig. 12 in perspective representation and Fig. 24 arrangements of terminal blocks with safety test probes inserted therein in perspective view and Fig. 25 a terminal block with inserted safety test probe in lateral sectional view and Fig. 26 and Fig. 27 sectional views of the terminal blocks according to the in Fig. 25 shown section line A - A and Fig. 28 the in Fig. 24 terminal blocks shown in a viewing direction on their conductor connection side and Fig. 29 a sectional view of the terminal blocks according to the in Fig. 28 shown section line B - B and Fig. 30 den in Fig. 29 marked area C in enlarged view and Fig. 31 den in Fig. 29 marked area D in enlarged view.

[0036] The figures use the same reference symbols for corresponding elements.

[0037] With simultaneous reference to the Fig. Sections 1 to 7 first describe the construction of the safety test probe 1.

[0038] The safety test probe 1 has a test contact section 2, a transition section 4, and a handling section 3. Each of these sections 2, 3, 4 is externally insulated and accordingly has insulating material; that is, the test contact section 2 has insulating material 29, the transition section 4 has insulating material 49, and the handling section 3 has insulating material 39. The insulating material 29, 39, 49 of sections 2, 3, 4 can be formed in one piece and, for example, manufactured in a common plastic manufacturing process in the form shown.

[0039] Handling section 3 is used for handling, i.e., for gripping and holding the safety test probe 1 by a user. Test contact section 2 is used to contact an electrical component to be tested, i.e., for insertion into a test opening of a terminal block. Transition section 4 connects handling section 3 to test contact section 2.

[0040] As particularly evident in the sectional views of the Fig. 6 and Fig. As can be seen in Figure 7, the test contact section 2 has a test contact 20 arranged within the insulating material 29, which is formed from an electrically conductive material, usually metal. The test contact 20 is not completely embedded in the insulating material 29, but protrudes from it with a tip 21. The tip 21 establishes the electrical contact with the electrical component to be tested.

[0041] In the handling section 3, an electrical connection contact 30 is arranged within the insulating material 39, e.g., in the form of a socket contact, i.e., a sleeve-like contact. The connection contact 30 has an interior 31 into which a pin-like connector can be inserted. The connector can be inserted into the connection contact 30 through an insertion opening 32 provided in the insulating material 39. The insulating material 39 of the handling section 3 has groove-like, circumferential protrusions or depressions 33 on its outer circumference, which facilitate the safe handling and gripping of the safety test probe 1 by a user.

[0042] For example, in the Fig. 1 and Fig. As can be seen in Figure 2, the longitudinal axis 28 of the test contact 20 runs alongside the longitudinal axis 38 of the connecting contact 30. These longitudinal axes 28 and 38 are therefore not aligned but run essentially parallel to each other. The connecting contact 30 is electrically connected to the test contact 20 via an electrically conductive bridge section 40. In this case, the bridge section 40 is designed as an angled end section of the test contact 20.

[0043] In the transition area 4 or at the end of the handling area 3 on the transition area side, a skirt 5 is arranged which projects radially beyond the insulating material 39 of the handling section 3 on its outer circumference. This provides an obstacle as defined in DIN EN 61010-031. As can be seen in particular from the Fig. 1 and Fig. As can be seen from Figure 5, the apron 5 is designed such that it only partially surrounds the outer circumference of the safety test tip 1 in a semi-circular manner. In the area not surrounded by the apron 5, the safety test tip 1, in particular its transition area 4, has a straight limiting edge 53 which essentially forms a tangent to the sleeve-like insulating material 39 of the handling section 3.

[0044] An additional obstacle within the meaning of DIN EN 61010-031 is further formed by an outer edge 41 of the transition section 4.

[0045] As can be seen, the skirt 5 is designed such that it does not extend at a constant height over the circumferential area it covers, but rather on two different levels in the longitudinal direction of the safety test probe 1. This is achieved by the skirt 5 having a first circumferential section 50 at a higher level, closer to the handling area 3, and a second circumferential section 52, which is lower and closer to the test contact section 2. The first circumferential section 50 is connected to the second circumferential section 52 via an inclined skirt connection section 51.

[0046] The Fig. Figure 8 shows an application of the safety test probe 1 with a terminal block 6. The terminal block 6 has an insulating housing 62 in which conductor entry openings 60 are provided for connecting electrical conductors. In addition, two closely spaced jumper openings 61 are provided in the insulating housing 62. These jumper openings 61 can be used as test openings in this embodiment. The safety test probe 1 is inserted into one of the jumper / test openings 61. The electrical connection points of the terminal block 6 are connected to each other via a busbar 63 arranged in the insulating housing 62.

[0047] The Fig. 9 shows the one in Fig. Figure 8 shows an enlarged view of the area marked by a dashed circle. It can be seen that the tip 21 of the test contact 20 is clamped between a clamping spring 64 and an inner wall of an opening in the busbar 63. This ensures that the safety test probe 1 is reliably electrically connected to the busbar 63 and also mechanically secured.

[0048] As the Fig. 10 and Fig. As shown in Figure 11, such terminal blocks 6 are relatively narrow. They are, for example, mounted closely together on DIN rails in control cabinets to provide a large number of electrical contacts for the electrical installation of a device. If tests are to be carried out on the electrical installation, the terminal block or its test openings often need to be fitted with test probes. Due to the close proximity of the terminal blocks 6, there is correspondingly little space for multiple test probes. As shown in the Fig. 10 and Fig. As can be seen from Figure 11, the safety test probe according to the invention allows for a very tightly packed arrangement even with closely spaced test openings of the terminal blocks 6. This is made possible by the fact that, due to the axial offset between the test contact and the connecting contact, the test contacts of several safety test probes 1 can be inserted into adjacent test openings, while the associated connecting contacts are shifted further outwards. In this case, the skirts 5 of the individual safety test probes 1 can overlap at least partially. This overlap of the skirts 5 is made possible by the height offset of the circumferential sections 50, 52.

[0049] The following is based on the Fig. The further embodiment of the safety test probe 1 described in sections 12 to 31 is comparable or partly identical in design to the embodiment of the safety test probe 1 described so far with regard to various features. Therefore, the differences of the further embodiment will be discussed below.

[0050] It is immediately apparent that the safety test probe 1 has a test contact section 2 which has a substantially rectangular or square cross-sectional shape, the corners of which may be rounded. As particularly evident in the Fig. 17, Fig. 18 and Fig. As can be seen from Figure 23, the test contact 20, guided in the insulating material 29 of the test contact section 2, also has a rectangular cross-sectional shape and is embedded in the insulating material 29. Towards the lower end, i.e., towards the tip 21, the insulating material 29 of the test contact section 2 tapers abruptly in a region 22, with a longitudinal rib on one side in a region 23 having the original material width of the insulating material 29. The region 23 has at least approximately the width of the tip 21, so that this region 23 and the spaces formed on both sides in region 22 to the left and right of the region 23 create a contour by which the test tip 1 can be used particularly advantageously with certain types of terminal blocks, as will be explained below.

[0051] In this embodiment, the actual tip 21 of the safety test probe 1 is not pointed in the true sense, but rather shaped similarly to a flat plug connector. The tip 21 has an upper crossbar 24 and a lower crossbar 26. The crossbars 24 and 26 are connected to each other by longitudinal ribs 25 that run substantially perpendicular to them. There are gaps between the longitudinal ribs 25. As, for example, in the Fig. 12 or Fig. As can also be seen in Figure 14, the longitudinal webs 25 do not run in a straight line, but have a curvature. Adjacent longitudinal webs 25 are convexly curved towards each other. In the illustrated embodiment, there are three longitudinal webs 25, which connect the transverse webs 24 and 26 at equal intervals.

[0052] It is further evident that the safety test probe 1 of the further embodiment has an offset in two coordinate directions between the longitudinal axis 28 of the test contact 20 and the longitudinal axis 38 of the connecting contact 30. For the corresponding electrical connection between the test contact 20 and the connecting contact 30, a straight transition area 40 could, in principle, be provided, similar to the embodiment described first, which then runs diagonally. However, the embodiment described here is particularly advantageous, especially due to the Fig. Figures 21 to 23 clearly show that in this embodiment, a bridge section 40 is provided, in which sections 43 and 44 project from a central section 42 over two essentially right-angled arc sections, projecting in opposite directions with a transverse offset from the central section 42. In this way, a particularly compact safety test probe 1 can be realized in the transition section 4, with the advantage that a particularly large number of test probes can be used in adjacent terminal blocks.

[0053] The Fig. Figure 24 shows an arrangement of three terminal blocks 6 of a first type R and three terminal blocks 6 of a second type S, which differs from the first type R. Safety test probes 1 are inserted into special bridging openings 61 in each of the terminal blocks 6. Fig. Figure 25 shows one of the terminal blocks 6 in a side sectional view with the safety test probes 1 inserted in the bridge openings 61. Fig. 26 and Fig. Figure 27 illustrates this using a cross-sectional view through the terminal blocks 6 of the two versions R, S according to the section line A - A, as in Fig. 25 marked.

[0054] The Fig. 28 illustrates the following based on the Fig. The situation already described in figures 24 to 27 is illustrated by a representation of the terminal blocks 6 looking towards the conductor entry openings 60. Fig. 29 shows a sectional view of the arrangement according to Fig. 28 corresponding to the section line B - B. The electrical contacts of the safety test probes 1 on the busbars 63 are already visible here. Due to the enlarged representations of the Fig. 30 and Fig.Figure 31 further illustrates the particularly favorable contact of the tip shape 21 in an opening of the busbar 63. It also shows how the safety test tip 1, with its tip-side area of ​​insulating material 29, is inserted into a bridge opening 61.

Claims

[1] Safety test probe (1) for testing electrical signals on electrical components (6), having the following features: a) at least one test contact (20) for electrically contacting an electrical component (6) to be tested with the safety test probe (1), b) at least one test contact section (2) electrically insulated by insulating material (29), in which the test contact (20) is at least partially arranged and from which the test contact (20) protrudes with a tip (21), c) at least one handling section (3) electrically insulated by insulating material (39), d) at least one electrically accessible connecting contact (30) from the handling section (3) for electrically connecting the safety test probe (1) to an electrical test device, wherein the connecting contact (30) is electrically connected to the test contact (20), e) at least one skirt (5) arranged between the handling section (3) and the tip (21) of the test contact (20), projecting beyond the insulating material (39) of the handling section (3) on the outer circumference to form an obstacle, characterized by the following characteristic f): f) the longitudinal axis (28) of the test contact (20) is not aligned with the longitudinal axis (38) of the connecting contact (30). [2] Safety test probe according to claim 1, characterized by , that the apron (5) only partially surrounds the outer circumference of the safety test tip (1). [3] Safety test probe (1) for testing electrical signals on electrical components (6), having the following features: a) at least one test contact (20) for electrically contacting an electrical component (6) to be tested with the safety test probe (1), b) at least one test contact section (2) electrically insulated by insulating material (29), in which the test contact (20) is at least partially arranged and from which the test contact (20) protrudes with a tip (21), c) at least one handling section (3) electrically insulated by insulating material (39), d) at least one electrically accessible connecting contact (30) from the handling section (3) for electrically connecting the safety test probe (1) to an electrical test device, wherein the connecting contact (30) is electrically connected to the test contact (20), e) at least one skirt (5) arranged between the handling section (3) and the tip (21) of the test contact (20), projecting beyond the insulating material (39) of the handling section (3) on the outer circumference to form an obstacle, f) the apron (5) only partially surrounds the outer circumference of the safety test tip (1), characterized by the following characteristic g): g) the apron (5) has an offset along its course around the circumference of the safety test tip (1) in the longitudinal direction of the safety test tip (1). [4] Safety test probe according to claim 2 or 3, characterized by , that the apron (5) surrounds the outer circumference of the safety test tip (1) in a semicircular shape. [5] Safety test probe according to one of claims 2 to 4, characterized by , that in the circumferential area of ​​the safety test tip (1) not surrounded by the apron (5) the safety test tip (1) has a straight limiting edge (53). [6] Safety test probe according to the preceding claim, characterized by , that the straight boundary edge (53) is a tangent to the outer circumference of the safety test tip (1). [7] Safety test probe according to any one of the preceding claims, characterized by, that the longitudinal axis (28) of the test contact (20) is arranged parallel to the longitudinal axis (38) of the connection contact. [8] Safety test probe according to any one of the preceding claims, characterized by , that the safety test probe (1) has a transition section (4) in which the test contact (20) is connected to the connecting contact (30) by a bridge area (40) which bridges a transverse offset to the connecting contact (30). [9] Safety test probe according to the preceding claim, characterized by , that the bridge area (40) runs substantially perpendicular to the longitudinal axis (28) of the test contact (20) and / or to the longitudinal axis (38) of the connecting contact (30) over the majority of its longitudinal extent. [10] Safety test probe according to one of claims 8 to 9, characterized by , that the apron (5) is arranged in the area of ​​the transition section (4) at the safety test tip (1). [11] Safety test probe according to one of claims 8 to 10, characterized by , that the bridge area (40) is designed as a component with at least two angled sections. [12] Safety test probe according to the preceding claim, characterized by , that the bridge area (40) has at least one first angled section (43) projecting from a central area (42) over an arc area and at least one second angled section (44) projecting from the central area (42) over an arc area, wherein the first angled section (43) projects from the central area (42) in a direction extending away from the second angled section (44). [13] Safety test probe according to any one of the preceding claims, characterized by , that the test contact (20) has a rectangular cross-sectional shape over the majority of its longitudinal extent. [14] Safety test probe according to any one of the preceding claims, characterized by , that the tip (21) of the test contact (20) has an arrangement of at least two substantially parallel transverse webs (24, 26) and at least two or at least three longitudinal webs (25) connecting the transverse webs (24, 26) to each other, between which spaces are formed. [15] Safety test probe according to the preceding claim, characterized by that one, several or all of the longitudinal webs (25) are curved. [16] Safety test probe according to any one of the preceding claims, characterized by , that a contact insert of the safety test probe (1), which includes at least the test contact (20), the bridge area (40) and the connecting contact (30), is designed as a single-piece component. [17] Safety test probe according to the preceding claim, characterized by, that an outer edge (41) of the transition section (4) forms an additional obstacle for the safety test tip (1). [18] Safety test probe according to any one of the preceding claims, characterized by , that the connecting contact (30) is designed as a socket contact arranged in the handling section (3) which is surrounded by the insulating material (39) of the handling section (3). [19] Safety test probe according to any one of claims 1, 2, 4 to 18, characterized by , that the apron (5) has an offset in the longitudinal direction of the safety test tip (1) along its course around the circumference of the safety test tip (1). [20] Safety test probe according to the preceding claim, characterized by , that the offset of the apron (5) is at least as large as the material thickness of the apron (5). [21] Safety test probe according to one of claims 19 to 20, characterized by, that the apron (5) has at least one first circumferential section (50) and at least one second circumferential section (52), wherein the second circumferential section (52) is offset in the axial direction of the safety test tip (1) from the first circumferential section (50). [22] Safety test probe according to the preceding claim, characterized by , that the first circumferential section (50) is connected to the second circumferential section (52) of the skirt (5) via a skirt connection section (51) which extends at least partially in the axial direction of the safety test tip (1). [23] Safety test probe according to any one of the preceding claims, characterized by that the test contact section (2) has at least partially or completely an outer cross-sectional contour that is rectangular or rectangular with rounded corners.

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