Patent Description:
A RF shielding box is understood to be a box, preferably made from metal, which prevents radiofrequency radiation from entering the box. Inside the box, usually sensitive electronics is placed.

In the prior art endoscopes are known. An endoscope apparatus may have an insertion portion as an elongated long member which is inserted into a site to be observed, e.g. a lumen of a large intestine or the like, an operation section which is connectively provided at a proximal end portion of the insertion portion, a universal cable which is a composite cable provided extensively from a side surface of the operation section, and an endoscope connector, which hereinafter may simply be abbreviated as a connector, which is provided at an end portion of the universal cable and is a connector for a medical instrument detachably connected to an external device which is a video processor integrated with a light source apparatus.

In the prior art, it is also known that inside such an endoscope connector shielding members may be used.

Connectors used in gastroenterology endoscopes generally have ducts for feeding water, air or gas and a suction channel. Connectors in pulmonology or urology endoscopes generally do not provide water, air or gas.

In the prior art, it is known that a shielding box inside the connector may be fixed to a mechanical holding structure by using soldering joints. This has the disadvantage, that a disassembling and assembling such a feeling box is tedious and takes a lot of time.

<CIT> discloses an endoscope comprising a shield box for electrical connections, wherein the shielding box features a conical box shape. The shielding box is mounted in the endoscope partly on face surfaces, using additional parts.

<CIT> disclose a RF shielding box for use inside of an connector for a medical instrument, in particular an endoscope, wherein the shielding box is cylinder-shaped, is conically tapered, wherein both a first end face an da second end face of the shielding box are rectangular shaped. Mounting of the shielding box is enabled by additional parts. A further RF shielding box is disclosed in <CIT>.

An object of the invention is to improve the prior art. In particular, it is an object of the invention to provide a device for mounting a shielding box inside an endoscope connector in an easy way, in particular an easily exchangeable way. In particular, it is an object of the invention that the shielding box should be mountable inside the connector without regular fastening elements, like e.g. screws or the like.

This object of the invention is solved by a RF shielding box for use inside a connector for a medical instrument having the features of independent claim <NUM>. Preferred embodiments of the invention are disclosed in the sub claims.

A "cylinder" is understood to be a three-dimensional shape bounded by a cylindrical surface and two parallel planes. The line segments determined by an element of the cylindrical surface between the two parallel planes is called an element of the cylinder. All the elements of a cylinder have equal lengths. The region bounded by the cylindrical surface in either of the parallel planes is called a base of the cylinder. The two bases are preferably identical figures or shapes. If the elements of the cylinder are perpendicular to the planes containing the bases, the cylinder is a right cylinder; otherwise it is called an oblique cylinder. Preferably, the cylinder is a right cylinder.

A "conically tapered area" is understood to be a two-dimensional area whose outer diameter is conical and decreases from one end to another end.

It is understood that an "area of the first end face" is larger than the "area of the second end face". A "longitudinal axis" of the shielding box preferably is a middle axis from a central point on the first end face to a central point on the second end face.

A "rectangular shaped plate" may either be an integral part of the first end face or the second end face, wherein at least a part of the plate protrudes from the area of the first end face or the second end face, wherein the area is part of the cylinder. A rectangular shaped plate may also be attached to the first end face or the second end face, wherein at least a part of the plate protrudes from the area of the first end face or the second end face, wherein the area is part of the cylinder.

The plates of the first end face of the shielding box are parallel to each other. The plates of the second end face of the shielding box are parallel to each other.

The "protruding parts" of the plates are adapted and installed such that the shielding box can be mounted inside the connector. This may e.g. be achieved by attaching the shielding box to some fixed mounting structure which is inside the connector and fixed with respect to or at the connector, wherein the protruding part of plates engage into mechanical structures, e.g. holes of a predetermined shape and spatial arrangement such that when the gravitational force pulls the shielding box to the gravitational centre of the earth, then the engagement between the protruding parts and the mechanical structure is such that the mechanical structure exerts a mounting force onto the shielding box, such that the shielding box does not move anymore and is in a stable position.

The base area of the shielding box is understood to be on the bottom of the shielding box, when the shielding box is installed on the rails, i.e. in the installation position. The installation position or the installation arrangement of the shielding box is preferably such that the longitudinal axis of the shielding box is horizontal. This has the advantage, that a user installing the shielding box can access the shielding box and the rails in a practical and easy way. The shielding box is preferably oriented such that the base area is horizontal. The base area may be a cutting plate or a stamped part having at least one bent edge, preferably two bent edges. Preferably the bent edges form the "protruding parts" of the plates.

Preferably, both the first end face and the second end face of the shielding box each comprise two rectangular shaped plates protruding from the area of the first end face and the second end face, where the plates are parallel to the first end face or the second end face.

When being installed, the first end face and the second end face of the shielding box preferably are vertical.

When being installed, the conically tapered faces of the shielding box preferably are vertical.

An advantage of the RF shielding box according to the present invention is that it can be disassembled and assembled inside the connector very easily and fast. Another advantage is, that for mounting the shielding box only parts are used, which are resistant to corrosion. Yet another advantage is that the fixation of their shielding box is stable and robust.

According to a preferred embodiment of the invention, longitudinal axes of the plates are each parallel to the base area of the cylinder. This has the advantage, that the plates protrude vertically from the first end face and the second end face, which is very convenient for the shielding box to be mounted inside the connector, e.g. to a structural element.

Preferably, the longitudinal axes of the plates lie within a single plane which is parallel to the base area of the cylinder. This has the advantage, that the plates are arranged at the same height of the shielding box, when the shielding box is used as intended.

According to another embodiment the base area is an isosceles trapezoid. In Euclidean geometry, an isosceles trapezoid is a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides. In any isosceles trapezoid, two opposite sides, i.e. the bases, are parallel, and the two other sides, the legs, are of equal length. Here, the bases of the isosceles trapezoid are situated at the first and the second end of the shielding box.

This has the advantage, that the shielding box has the same symmetry as the isosceles trapezoid, i.e. the shielding box is symmetrical with respect to the longitudinal axis from the first end face to the second end face.

The base area and the two rectangular shaped plates may be part of a single workpiece which may be manufactured by bending a cutting plate at at least one edge. Preferably the cutting plate is bent along two preferably parallel edges at opposite ends of the cutting plate. Two opposing two rectangular shaped plates on one end of the cutting plate preferably lie on a straight line. The two opposing two rectangular shaped plates on the other end of the cutting plate preferably lie on a straight line, too. Preferably, these two straight lines are parallel to each other and are preferably parallel to the bent edges.

According to the invention, at least two of the protruding parts of the plates are adapted and installed to be arranged inside at least two holes, wherein the holes are arranged inside a first and a second rail, which each when used as intended are parallel to the conically tapered faces of the shielding box.

The first and the second rail are used to mount or fix the shielding box to the rails. Preferably, the holes, into which the protruding parts of the plates engage, extent horizontally inside the rails, when the rails are used in the installation arrangement.

The first and the second rail are arranged on opposing sides of the shielding box.

The at least two holes preferably comprise for instance two holes or four holes. In the case of two holes, it is preferred, that the first hole is arranged at the first end of the first rail and the second hole is arranged at the first end of the second rail.

In the case of four holes, it is preferred, that the first hole is arranged at the first end of the first rail, the second hole is arranged at the first end of the second rail, the third is arranged at the second end of the first rail, and the fourth hole is arranged at the second end of the second rail.

In particular for the case of two holes, it is further preferred, that the first rail and / or the second rail each comprise another hole in the inside of the rail, such that two opposing plates can be moved or shifted back and forth inside the holes.

According to the invention, the RF shielding box further comprises a first rail and a second rail, which each are parallel to the conically tapered faces of the shielding box. Here the first rail and the second rail each comprise a hole on a first end and/or a second end. Each rail comprises for instance one or preferably two holes. Further the holes on the first end of the first rail and the second rail are adjacent to the first end face of the shielding box. The holes at the second end of the first rail and the second rail, if existent, are adjacent to the second end face of the shielding box. This has the advantage, that the holes are arranged that the protruding parts of the RF shielding box can easily be inserted into the holes.

The two protruding parts of the first end face may be arranged inside the holes on the first end of the first rail and the second rail.

Additionally or alternatively, the two protruding parts of the second end face may be arranged inside the holes on the second end of the first rail and the second rail.

This has the advantage, that the shielding box is securely tightened to the first and second rail, which are arranged to either side of the shielding box.

Preferably the holes are slits, which preferably are aligned vertically, when the shielding box is used in the installation arrangement. The size of the slit preferably is such that it is slightly larger than the size or the cross-section of the respective plate to be arranged inside the slit.

This has the advantage, that the plates are securely tightened in the slits, which in turn achieves that the shielding box is securely tightened to the first and second rail.

The shielding box may be adapted and installed to be press fitted between the first and the second rail such that it is guaranteed that assembled parts inside the shielding box do not move or are shaken.

The first end of the first rail and the first end of the second rail may be adapted to be fixed to opposite ends on an inside of a casing element of the connector or to opposite ends or opposite positions on an outer rim of an opening of the casing element of the connector.

Additionally or alternatively, the second end of the first rail and the second end of the second rail may be adapted to be fixed to opposite ends on the outside of an end side fixation device of a cable which is connectable to the connector. The fixation device of a cable may e.g. be a bushing, a socket, a plug socket or a connector, in particular a female connector.

The opposite ends on an inside of a casing element of the connector or to opposite ends or opposite positions on an outer rim of an opening of the casing element of the connector on the one hand and the opposing ends on the outside of the end side fixation device on the other hand may lie within a plane.

Preferably, the diameter of the outer rim of an opening of the casing element is larger than the outside of the end side fixation device. The opening of the casing element may have a roundish or round shape.

This has the advantage that all devices or parts used to fix the shielding box lie within a single plane, which preferably is horizontal, when used in the installation arrangement.

The press fit may be achieved by bending the first end of the first rail towards the second rail and then fixing the first end of the first rail to an inside of a casing element and/or by bending the first end of the second rail towards the first rail and then fixing the first end of the second rail to an inside of the casing element. This bending advantageously has an elastic effect.

According to some embodiments, the more rails ends are bent to the inside, the easier it is to attach them to the casing member. Preferably, the distance between the casing element and the fixation points is chosen such that that there will be a press fit.

Alternatively, the press fit may be achieved by fixing the second end of the first rail and the second end of the second rail to opposing ends on the outside of the end side fixation device such that the first rail and second rail are pressed against the conically tapered faces of the shielding box. This has the advantage, that the press fit may be achieved by only tightening the screws on the second end of the rails.

According to another aspect of the invention, the object of the invention is solved by a medical instrument, in particular an endoscope, comprising a shielding box which was described above.

According to yet another aspect of the invention, the object of the invention is solved by a method for fixing a RF shielding box inside a connector for a medical instrument, in particular an endoscope, the shielding box preferably being an abovementioned shielding box.

According to a first step of the method a second end of a first rail and a second end of a second rail are fixed to opposing ends on an outside of an end side fixation device of a cable which is connectable to the connector.

According to a second step of the method the shielding box is guided such that plates of a second end face run inside of elongated holes of both the first rail and the second rail until the plates contact an end of the elongated holes near a second end of the first rail or second rail.

According to a third step tubes, e.g. water supply tubes, which run from the end side fixation device of the cable towards the casing member or vice versa, are connected. This step may also be performed before the first step or after the last step of the present method.

According to a fourth step a casing element of the connector is provided such that opposing ends of an outer rim of an opening of the casing element are adjacent to a first end of the first rail and a first end of the second rail.

According to a fifth step the first end of the first rail and the first end of the second rail are fixed to the opposing ends on the outer rim of the opening of the casing element of the connector.

An embodiment of the invention is shown in the drawings and will be explained in more detail in the following description.

A RF shielding box <NUM> is cylinder-shaped and has a base area <NUM>. Opposite of the base area <NUM>, the cylinder <NUM> comprises a surface <NUM>, which has the same dimension as the base area <NUM>. Both the base area <NUM> and the surface <NUM> are conically tapered from a first end <NUM> of the shielding box <NUM> to a second end <NUM> of the shielding box <NUM>. Both the base area <NUM> and the surface <NUM> have the shape of an isosceles trapezoid.

At the first end <NUM> of the shielding box <NUM> a first end face <NUM> is arranged and at the second end <NUM> of the shielding box <NUM> a second end face <NUM> is arranged. Both the first end face <NUM> and the second end face <NUM> of the shielding box <NUM> are rectangular shaped.

Both the first end face <NUM> and the second end face <NUM> of the shielding box <NUM> each comprise two rectangular shaped plates <NUM> protruding from the area of the first end face <NUM> and the second end face <NUM>. The plates <NUM> are parallel to the first end face <NUM> or the second end face <NUM>, respectively. The plates <NUM> of the first end face <NUM> and the second end face <NUM> of the shielding box <NUM> are parallel to each other, respectively. Longitudinal axes <NUM> of the plates <NUM> lie within a single plane which is parallel to the base area <NUM> or the surface <NUM> of the cylinder <NUM>.

The protruding parts of the plates <NUM> are used to mount the shielding box <NUM> inside the connector <NUM>.

The RF shielding box <NUM> is used inside a connector <NUM> for an endoscope. Inside the RF shielding box <NUM> electronics <NUM> may be mounted. The connector <NUM> comprises a casing element <NUM>, a bushing <NUM> and a second casing element connecting the casing element <NUM> and the bushing <NUM>. The RF shielding box <NUM> and the rails are surrounded by the second casing element. A cross-section of the second casing element starting from the casing element <NUM> towards the bushing <NUM> is as follows: at first the cross-section is octagonal, then the cross-section will get smaller and round at the end towards the bushing <NUM>.

The connector <NUM> has an elongated shape with differing cross-section. The longitudinal axis of the connector <NUM> is horizontal, when the connector <NUM> and the shielding box <NUM> are used in the installation arrangement or installation position.

The connector <NUM> has a casing element <NUM> on a first side of the connector <NUM> and a bushing <NUM> for a universal cable on a second side of the connector <NUM>. The bushing <NUM> and the casing element <NUM> are fixed to one another using a first rail <NUM> and the second rail <NUM>, whose distance from each other is conically tapered from the casing element <NUM> towards the bushing <NUM>.

The casing element <NUM> comprises an opening <NUM> facing the shielding box <NUM> and the bushing <NUM>. The opening <NUM> has a roundish rim <NUM>. The cross-section perpendicular to the longitudinal axis of the casing element <NUM> has the shape of an octagon. Accordingly, the opening <NUM> and the rim <NUM> also have the shape of an octagon. The octagon has rounded edges. The area of the opening <NUM> is slightly larger than the first end face <NUM>. On opposite sides of the octagon, the rim <NUM> comprises a tab-like first reinforcement structure <NUM> and a tab-like second reinforcement structure <NUM>. A connection line between the first reinforcement structure <NUM> and the second reinforcement structure <NUM> to is preferably horizontal, when the shielding box <NUM> is in the installation position.

The bushing <NUM> for the universal cable has a roundish shape which is slightly smaller than the area of the second end face <NUM>. The bushing <NUM> is hollow such that ducts can be guided inside. At a rim <NUM> of the bushing <NUM>, which faces the second end face <NUM> of the shielding box <NUM>, the bushing <NUM> comprises a first longitudinal tab <NUM> and a second longitudinal tab <NUM> which are arranged on the rim <NUM> at opposite positions. In the installation position of the shielding box <NUM>, the first longitudinal tab <NUM> and the second longitudinal tab <NUM> are horizontal. The first longitudinal tab <NUM> and the second longitudinal tab <NUM> are each parallel to the first rail <NUM> and the second rail <NUM>.

A first end <NUM> of the first rail <NUM> is fixed to the first reinforcement structure <NUM> and a second end <NUM> of the first rail <NUM> is fixed to the first longitudinal tab <NUM>. A first end <NUM> of the second rail <NUM> is fixed to the second reinforcement structure <NUM> and a second end <NUM> of the second rail <NUM> is fixed to the second longitudinal tab <NUM>.

The first rail <NUM> and the second rail <NUM> each are parallel to the conically tapered faces <NUM>, <NUM> of the shielding box <NUM>.

According to the second and third embodiment, the first rail <NUM> comprise a slit like hole <NUM> on the first end <NUM> of the first rail <NUM> and the second rail <NUM> comprise a slit like hole <NUM> on the first end <NUM> of the second rail <NUM>.

According to the third embodiment the first rail <NUM> comprise a slit like hole <NUM> on the second end <NUM> of the first rail <NUM> and the second rail <NUM> comprise a slit like hole <NUM> on the second end <NUM> of the second rail <NUM>.

The first rail <NUM> and the second rail <NUM> each comprise a plate like elongated body which comprises an elongated hole in a central part of the rail. In the installation position or installation arrangement, that longitudinal axes of both the first rail <NUM> and the second grade <NUM> are horizontal and the second dimension of the plate like structure extends vertically.

At the first end <NUM> the first rail <NUM> is fixed to the tab-like first reinforcement structure <NUM> using two screws <NUM>, wherein the first end <NUM> of the first rail <NUM> comprises two holes and the first reinforcement structure <NUM> comprises two threads. Here the threads and screws <NUM> are arranged vertically above one another. The first end <NUM> of the first rail <NUM> is fixed to the first reinforcement structure <NUM> from the inside. Therefore, the screws <NUM> are arranged on the inside of the first rail <NUM>. At the first end <NUM> the second rail <NUM> is fixed to the tab-like second reinforcement structure <NUM> using another two screws <NUM>, wherein the first end <NUM> of the second rail <NUM> comprises two holes and the second reinforcement structure <NUM> comprises two threads. Here the threads and screws <NUM> are arranged vertically above one another. The first end <NUM> of the second rail <NUM> is fixed to the second reinforcement structure <NUM> from the inside. Therefore, the screws <NUM> are arranged on the inside of the second rail <NUM>.

The distance <NUM> between the inner ends of the first reinforcement structure <NUM> and the second reinforcement structure <NUM> is smaller than the distance <NUM> between the outer ends of the first rail <NUM> and the second rail <NUM> at the casing member <NUM> at rest. That means that the outer ends of the first rail <NUM> and the second rail <NUM> have to be bent to the inside in order to fit between the inner ends of the first reinforcement structure <NUM> and the second reinforcement structure <NUM>.

Preferably, an end of first rail <NUM> and the second rail <NUM> at the casing member <NUM> is bent to the inside by a predetermined angle <NUM>. When tightening the screws <NUM> to the first rail <NUM> and the second rail <NUM>, the first rail <NUM> and the second rail <NUM> will be squeezed against the casing element <NUM> such that the bending of the ends of the first rail <NUM> and the second rail <NUM> is removed.

At the second end <NUM> the first rail <NUM> is fixed to the first longitudinal tab <NUM> using two screws <NUM>, wherein the second end <NUM> of the first rail <NUM> comprises two holes and the first longitudinal tab <NUM> comprises two threads. Here the threads and screws <NUM> are arranged horizontally next to one another along the longitudinal axis of the first rail <NUM>. The first rail <NUM> is fixed on the outer side of the first longitudinal tab <NUM>. Therefore, the screws <NUM> are arranged on the outside of the first rail <NUM>. At the second end <NUM> the second rail <NUM> is fixed to the second longitudinal tab <NUM> using another two screws <NUM>, wherein the second end <NUM> of the second rail <NUM> comprises two holes and the second longitudinal tab <NUM> comprises two threads. Here the threads and screws <NUM> are arranged horizontally next to one another along the longitudinal axis of the second rail <NUM>. The second rail <NUM> is fixed on the outer side of the second longitudinal tab <NUM>. Therefore, the screws <NUM> are arranged on the outside of the second rail <NUM>.

According to the third embodiment of the shielding box <NUM> and the rails <NUM>, <NUM>, the shielding box <NUM> may be installed as follows: First, the first rail <NUM> and the second rail <NUM> are fixed at the bushing <NUM>. Second, the protruding parts of the plates <NUM> at the second and phase <NUM> of the shielding box <NUM> are inserted into the elongated holes inside the first rail <NUM> and the second rail <NUM>. Third, the whole shielding box <NUM> is guided towards the bushing <NUM>, such that the plates <NUM> contact the end of the elongated holes the other bushing <NUM>. Fourth, the two protruding parts of the plates <NUM> of the first end face <NUM> are inserted into the holes <NUM> of the first rail <NUM> and the hole <NUM> of the second rail <NUM>, respectively. Fifth, the first end <NUM> of the first rail <NUM> and the first end <NUM> of the second rail <NUM> are fixed to the first reinforcement structure <NUM> and the second reinforcement structure <NUM>. After that the second casing member may be fixed to the casing member <NUM> and the bushing <NUM>. Before that step tubes running from the bushing <NUM> towards the casing member <NUM> may also be connected.

The third embodiment has the advantage that in order to install the shielding box <NUM>, there is no need to remove the screws <NUM> on the side of the bushing <NUM>.

According to the second embodiment of the shielding box <NUM> and the rails <NUM>, <NUM>, the shielding box <NUM> may be installed as follows:.

First, the first rail <NUM> and the second rail <NUM> are fixed to opposite conically tapered faces <NUM>, <NUM> of the shielding box <NUM>). This is done by moving the first rail <NUM> onto the conically tapered face <NUM> such that the protruding part of the plate <NUM> of the first end face <NUM> enters the slit like hole <NUM> of the first rail <NUM> and the protruding part of the plate <NUM> of the second end face <NUM> enters the slit like hole <NUM> of the first rail <NUM>. The second rail <NUM> is moved onto the conically tapered face <NUM> opposite the conically tapered face <NUM> such that the protruding part of the plate <NUM> of the first end face <NUM> enters the slit like hole <NUM> of the second rail <NUM> and the protruding part of the plate <NUM> of the second end face <NUM> enters the slit like hole <NUM> of the second rail <NUM>.

Second, the shielding box <NUM> together with the first rail <NUM> and the second rail <NUM> are moved towards the bushing <NUM> and the first rail <NUM> and the second rail <NUM> are fixed at the bushing <NUM> using screws <NUM>.

Third, the first end <NUM> of the first rail <NUM> and the first end <NUM> of the second rail <NUM> are fixed to the first reinforcement structure <NUM> and the second reinforcement structure <NUM>.

After that the second casing member may be fixed to the casing member <NUM> and the bushing <NUM>. Before that step, tubes running from the bushing <NUM> towards the casing member <NUM> may also be connected.

<FIG> shows a flow chart for a method <NUM> for fixing the RF shielding box <NUM> inside the connector <NUM> for the endoscope <NUM> shown in <FIG>. The shielding box <NUM> is the above mentioned shielding box <NUM>.

According to a first step <NUM> of the method <NUM> a second end <NUM> of a first rail <NUM> and a second end <NUM> of a second rail <NUM> are fixed to opposing ends <NUM>, <NUM> on an outside of an end side fixation device <NUM> of a cable <NUM> which is connectable to the connector <NUM>.

According to a second step <NUM> of the method <NUM> the shielding box <NUM> is guided such that plates <NUM> of a second end face <NUM> run inside of elongated holes <NUM> of both the first rail <NUM> and the second rail <NUM> until the plates <NUM> contact an end of the elongated holes <NUM> near a second end <NUM>, <NUM> of the first rail <NUM> or second rail <NUM>.

According to a third step <NUM> a casing element <NUM> of the connector <NUM> is provided such that opposing ends <NUM>, <NUM> of an outer rim <NUM> of an opening <NUM> of the casing element <NUM> are adjacent to a first end <NUM> of the first rail <NUM> and a first end <NUM> of the second rail <NUM>.

Claim 1:
A radio-frequency , RF, shielding box (<NUM>) for use inside a connector (<NUM>) for a medical instrument (<NUM>), in particular an endoscope (<NUM>), wherein the shielding box (<NUM>) has a base area (<NUM>) which is conically tapered from a first end (<NUM>) of the shielding box (<NUM>) to a second end (<NUM>) of the shielding box (<NUM>); wherein both a first end face (<NUM>) and a second end face (<NUM>) of the shielding box (<NUM>) are rectangular shaped; wherein two rectangular shaped plates (<NUM>) protruding from the area of the first end face (<NUM>) and the second end face (<NUM>) are arranged each on the first end face (<NUM>) or on the second end face (<NUM>) of the shielding box (<NUM>), respectively, where the plates (<NUM>) are parallel to the first end face (<NUM>) or the second end face (<NUM>), respectively; and wherein the plates (<NUM>) of the first end face (<NUM>) and the second end face (<NUM>) of the shielding box (<NUM>) are parallel to each other, respectively; wherein the protruding parts of the plates (<NUM>) are adapted and installed such that the shielding box (<NUM>) can be mounted inside the connector (<NUM>) wherein at least two of the protruding parts of the plates (<NUM>) are adapted and installed to be arranged inside at least two holes (<NUM>, <NUM>, <NUM>, <NUM>), wherein the holes (<NUM>, <NUM>, <NUM>, <NUM>) are arranged inside a first and a second rail (<NUM>, <NUM>) of the connector (<NUM>) which, when the shielding box (<NUM>) is mounted inside the connector (<NUM>), are parallel to conically tapered faces (<NUM>, <NUM>) of the shielding box (<NUM>), and the connector (<NUM>) further comprising: the first rail (<NUM>) and the second rail (<NUM>); and wherein the first rail (<NUM>) and the second rail (<NUM>) each comprise the holes (<NUM>, <NUM>, <NUM>, <NUM>) on a first end (<NUM>, <NUM>) and a second end (<NUM>, <NUM>) of the first rail (<NUM>) or the second rail (<NUM>); wherein the holes (<NUM>, <NUM>) on the first end (<NUM>, <NUM>) of the first rail (<NUM>) and the second rail (<NUM>) are adjacent to the first end face (<NUM>) of the shielding box (<NUM>) when the shielding box (<NUM>) is mounted inside the connector (<NUM>); and/or the holes (<NUM>, <NUM>) on the second end (<NUM>, <NUM>) of the first rail (<NUM>) and the second rail (<NUM>) are adjacent to the second end face (<NUM>) of the shielding box (<NUM>) when the shielding box (<NUM>) is mounted inside the connector (<NUM>).