WO2021005138A1

WO2021005138A1 - Measuring instrument for installation in a control panel

Info

Publication number: WO2021005138A1
Application number: PCT/EP2020/069319
Authority: WO
Inventors: Johannes RÄDEL
Original assignee: Dipl.-Ing. H. Horstmann Gmbh
Priority date: 2019-07-09
Filing date: 2020-07-09
Publication date: 2021-01-14
Also published as: DE102019118554A1

Abstract

The present invention relates to a measuring instrument for installation in a control panel (1) of a high voltage or medium voltage installation, having a housing (2) for mounting in a mounting port (4) of the control panel (1). The housing (2) has at least one bearing surface (10) for bearing on the control panel (1) in the edge region of the mounting port (4) and running perpendicular to a mounting direction. The housing (2) has at least one fixing means (12, 12a) movably arranged on the circumference, which is arranged movably relative to the housing (2) on the housing (2) in such a way that the fixing means (12, 12a) can be moved from a locked position to a release position and back. In the locked position, the housing (2) is securely clamped in the mounting port (4) and in the release position can be removed from the mounting port (4). The housing (2) has a housing graduation (24) running in the mounting direction in the area of the fixing means (12, 12a), which protrudes into the housing (2) to a depth perpendicular to the mounting direction and forms a pocket. The fixing means (12, 12a) is arranged movably mounted in the pocket.

Description

"Measuring device for installation in a control panel"

The invention relates to a measuring device for installation in a switchboard of a high or medium voltage system with a housing for installation in a

Mounting opening of the control panel, the housing having at least one support surface running perpendicular to a mounting direction for resting on the control panel in the edge area of the mounting opening, the housing having at least one circumferentially moveable arresting means which is arranged in such a way that it is movable relative to the housing on the housing is that the locking means can be moved from a locking position into a release position and back, the housing being clamped in the locking position in the mounting opening and being removable from the mounting opening in the release position.

For the installation of measuring devices of the type mentioned in the installation openings of control panels, a precisely fitting installation and secure installation position is of particular relevance. Therefore, the housing of the device must be adapted to the mounting opening and the wall thickness of the control panel itself in order to ensure a seamless,

preferably sealing, attachment to achieve. This is especially for

Applications exposed to dust and moisture are of great importance. The measuring devices known from the prior art mostly use locking means as locking means, whereby the control panel between the

Support surface and the locking means is clamped with a clamping force acting against the mounting direction. In the event of maintenance work, the

Measuring devices are removed from the mounting opening with a tool by pushing back the locking means that reach behind the control panel. Improper handling can result in damage to the housing, which means that the measuring device can be reused after the

Prevent maintenance work. In addition, the wall thicknesses of switchboards different due to manufacturing tolerances and different manufacturers, which can lead to a tilting of the locking means or the housing, or to a loose assembly in the assembly opening.

From DE 20 2014 103 330 U1 a device is known in which the as

Locking means formed locking means are connected by connecting means to the housing. This enables an elastic design of the

Connecting means that the locking means are displaceable along the assembly direction. The contact surface of the housing is pressed against the control panel by means of an elastic return deformation of the locking means, the measuring device being locked in the mounting opening by embedding the control panel between the locking means and the contact surface. To dismantle the measuring device, the

Latching means is moved into a release position by a release tool in a gap extending in the assembly direction between the housing and control panel and pushes the latching means perpendicular to the assembly direction into the assembly opening. This releases the control panel and the removal of the

Measuring device enables. There is a potential for damage by inserting the loosening tool into the gap. Furthermore, this type of

Fastening the measuring device, especially in the circumferential area of the housing, takes up a large amount of space, which means that little space is available inside the measuring device for any measuring device components. Another disadvantage of the known device is that it is only designed for one wall thickness of the control panel, so that if the wall thickness is different, the device cannot be installed at all or can only be installed under great tension.

The invention is based on the object of providing a measuring device of the type mentioned at the beginning with an alternative fastening mechanism which is able to overcome the disadvantages known from the prior art.

The object is achieved according to the invention by the features of claim 1 in that the housing in the area of the locking means has a housing gradation which extends in the assembly direction and which has a depth perpendicular to the Mounting direction protrudes into the housing and forms a pocket, the locking means being movably mounted in the pocket. Using the

Housing gradation, the locking means is securely arranged on the housing and the risk that the locking means when moving from the release position to the

Locked position or wedged from the locked position into the release position is reduced.

In a particular embodiment of the invention, by means of the movement of the locking means from the release position into the locking position, a receiving circumference of the housing is at least partially enlarged, so that in the assembled state the housing is at least partially clamped perpendicular to the assembly direction against an inside of the assembly opening, and by means of the movement of the locking means from the locking position to the release position, the receiving circumference of the housing is at least partially reduced.

“At least partially tensioned” means in the sense of the invention that, in particular, further tension can also occur, although a proportion of tension perpendicular to the assembly direction is always exerted on an inside of the assembly opening.

Due to the advantageous enlargement of the receiving area, the housing can be installed in the installation opening with little installation effort. In this case, the invention makes it possible to match the housing to different switchboards, which have different wall thicknesses, during the manufacture of the housing.

“In the assembled state” in the sense of the invention means that the housing is arranged in the assembly opening and the locking means is aligned in the locking position. “In the assembled state” in particular denotes the final state of assembly.

In an advantageous embodiment of the invention, the housing has at least one elastic, in particular tab-like, clamping arm in the area of the Locking means formed. The clamp arm extends from one to the

Housing integrally molded beginning against the mounting direction towards an open end. The open end is perpendicular to the direction of assembly from the housing, the clamping arm in the locked position on the

Locking device is applied. As a result, by means of the movement of the locking means from the release position into the locking position, the receiving circumference is enlarged at least in the area of the open end, so that the open end is mounted

State is braced at least partially perpendicular to the assembly direction against the inside of the assembly opening. By moving the locking means from the locking position to the release position, the circumference of the housing is reduced by elastic deformation of the clamping arms, so that the housing can be removed from the assembly opening against the assembly direction. Advantageously, the locking means for a fixation of the installation position of the housing spreads the clamping arm perpendicular to the mounting direction outwards and thereby brings about the enlargement of the receiving circumference. Here, the locking means only acts indirectly on the assembly opening. Since the clamping arm extends between the inside of the assembly opening and the locking means, the risk of the locking means becoming wedged or caught is advantageously reduced. The elastic design of the clamping arm enables it to be automatically reshaped when the locking means is moved from the locking position to the release position. As a result, the scope of the receptacle is reduced to an initial dimension so that the housing can be inserted into and removed from the assembly opening. It is advantageous here that a tool engagement extending in the assembly direction between the housing and the control panel is not necessary for a release tool. In particular the

Disassembly effort, e.g. B. during maintenance work, and the space required for

Tool attacks are reduced by this design.

In an improved embodiment, the clamping arm has a latching step at its open end to rest against an inside of the panel, the length of which in the assembly direction is designed such that the distance between the latching step and the support surface is free of play between the receiving surface and the latching step enables. Advantageously, a system for the inside of the control panel is created with the locking step, which in the locking position a movement of the Housing against the mounting direction, ie a removal of the housing from the mounting opening, prevented. By moving the locking means from the release position to the locking position, the open end of the clamping arm is clamped perpendicular to the mounting direction against the inside of the control panel.

To enable universal use of the measuring device, the

Clamping arm preferably has at least one second latching step at its open end. Here, a length of the respective latching steps in the assembly direction is designed in such a way that the distance between the respective further latching step and the support surface enables an alternative switchboard, which is thicker in terms of value, to be received between the receiving surface and another latching step without play.

According to another embodiment of the measuring device, an elastic clamping arm extends in the area of the locking means from a start formed integrally with the circumference of the housing in the assembly direction

Mounting opening towards an open end. The clamping arm preferably extends into the mounting opening starting from the bearing surface of the housing. In this case, the clamping arm rests against the locking means in the locking position, so that by means of the movement of the locking means from the release position into the locking position, the receiving circumference at least in the area of a ramp section in the

Housing gradation is increased. For this embodiment, it is necessary that the depth of the housing gradation is reduced over the course of the housing gradation in the assembly direction in a ramp section. When the locking means is moved from the release position into the locking position, the locking means slides over the ramp-like course of the ramp section and is guided outwards perpendicularly to the assembly direction. Here, the locking means comes into contact with the elastic clamping arms and in turn pushes them outwards perpendicular to the assembly direction. As a result, the clamping arm in the assembled state is at least partially braced against the inside of the assembly opening perpendicular to the assembly direction. By moving the locking means from the locking position to the release position, the receiving circumference of the housing is reduced by elastic re-deformation of the clamping arms, so that the housing can be removed from the assembly opening against the assembly direction. In this embodiment, the same advantageous properties are realized that are already described above for the elastic clamping arms, which are against the

Extend mounting direction are described. An added benefit is with this

Execution that the risk of wedging the clamping arms on the

Mounting opening of the control panel when removing the housing from the

Mounting opening is smaller. Even if the elastic properties of the clamping arms deteriorates, e.g. B. due to old age or extraordinary

Temperatures, no tool is required to reshape the clamping arms and thereby reduce the size of the holder. In this case the

When the housing is moved against the assembly direction, the clamping arms are pressed inward through the assembly opening perpendicular to the assembly direction.

In a preferred embodiment of the measuring device, the locking means has elastic stop elements on a surface pointing outward perpendicularly to the assembly direction. The stop elements are arranged such that in

Bolt position the control panel is arranged between the stop elements and the support surface. In this embodiment, the locking means is braced in an assembled state at least partially perpendicular to the assembly direction directly against the inside of the assembly opening. When the locking means is moved from the release position into the locking position, the locking means slides over the ramp-like profile of the ramp section and becomes perpendicular to the

Assembly direction outwards. As a result, the stop elements are arranged in an area which, viewed in the assembly direction, lies behind the support surface and in the assembly opening. In the assembled state, the switchboard is embedded between the stop elements and the support surface, and one

Movement of the housing against the assembly direction out of the assembly opening is prevented by the contact of the control panel on the stop elements. The stop elements are advantageously designed to be elastic in such a way that they adapt to different wall thicknesses of different mounting walls, so that the measuring device can be used universally for different switchboards. An alternative in this regard are adaptable stop elements that are only adapted at the installation site. For this purpose, several stop elements are placed in a row on the Formed surface of the locking means. At the installation site, by removing individual stop elements, e.g. B. cutting or filing, the housing can be adapted to the actual control panel.

To dismantle the measuring device, the locking means of the

Bolt position moved to the release position. Here, the person dismantling must move the locking means against the assembly direction relative to the housing, with a certain release force having to be overcome depending on the elastic design of the stop elements. As soon as this has happened, the locking means slides against the assembly direction over the ramp-like course of the ramp section and is guided inwards perpendicular to the assembly direction. This again reduces the scope of the receptacle, and the housing can be safely removed from the assembly opening.

Further advantageous embodiments of the invention emerge from the following description of the figures and the dependent claims.

Show it:

Fig. 1 A perspective view of a first, in a

Installation opening of a control panel,

housing according to the invention,

FIG. 2 shows a sectional view along X-X according to FIG. 1,

3 shows a detailed view of area A according to FIG. 2,

FIG. 4 shows a detailed view of area B according to FIG. 2,

Fig. 5 is a perspective view of a second, in a

Installation opening of a control panel,

housing according to the invention, 6 shows a sectional view along XX according to FIG. 5,

FIG. 7 shows a detailed view of the area C according to FIG. 6, FIG. 8 shows a perspective view of a third, in a

Installation opening of a control panel,

housing according to the invention,

9 shows a sectional view along XX according to FIG. 8, FIG. 10 shows a detailed view of area D according to FIG. 9, FIG. 11 shows a plan view of a locking means according to the invention, FIG. 12 shows a side view of a housing according to the invention with the locking means according to the invention according to FIG. 5 in

Bolt position,

13 shows an alternative embodiment according to the invention of the housing according to FIG. 1 in area A according to FIG. 2,

14 is a perspective view of a fifth, in a

Installation opening of a control panel,

housing according to the invention,

15 shows a sectional view along X-X according to FIG. 14, FIG. 16 shows a detailed view of the area E according to FIG. 15, and FIG

17 shows a plan view of a further embodiment of a

locking means according to the invention. In the various figures of the drawing, the same parts are always provided with the same reference symbols.

In the following description it is expressly claimed that the

Invention does not affect all or more features of the described

Combinations of features is limited; rather, each individual sub-feature of the exemplary embodiment can also be detached from all other sub-features described in connection therewith on its own and also in combination with other features and also independently of the feature combinations and

References back to the claims have an inventive meaning in connection with the subject matter of claim 1.

Figure 1 shows a housing 2 of a measuring device for installation in a switchboard 1 of a high or medium voltage system. The housing 2 shown in FIG. 1 is already in a mounted state in the control panel 1. The housing 2 is used to mount the measuring device in a mounting opening 4 in the control panel 1.

At right angles to an assembly direction M, the housing 2 has at least one support surface 10 for resting on the control panel 1 in the edge area of the

Mounting opening 4. The support surface 10 prevents the housing 2 from being shifted too far into the assembly opening 4 in the assembly direction M by limiting the movement in the assembly direction M by resting on the control panel 1 in the edge region of the assembly opening 4. At least one support surface 10 means that individual support surfaces 10 distributed over the circumference of the housing 2 also fulfill the same function.

As shown in FIGS. 3, 7, 10 and 16, the housing 2 has at least one locking means 12, 12a, 12b movably arranged on the circumference. The locking means 12, 12a, 12b is movably arranged on the housing 2 relative to the housing 2 in such a way that the locking means 12, 12a, 12b can be moved from a locking position to a release position and back. In particular, the locking means 12, 12a, 12b is from the release position into the locking position or back through a movement in the assembly direction M or against the assembly direction M or through a rotation can be transferred about an axis of rotation of the locking means 12. The housing 2 is clamped in the locking position in the mounting opening 4 and in the

The release position can be removed from the assembly opening 4.

According to the invention, the housing 2 in the area of the locking means 12, 12a, 12b has a housing graduation 24 running in the assembly direction M, which protrudes into the housing 2 hi no with a depth T perpendicular to the assembly direction M and forms a pocket 26. The locking means 12, 12a, 12b are movably mounted in the pocket 26. Are there several locking devices 12, 12a, 12b

provided, the housing 2 can each locking means 12, 12a, 12b one

Have housing gradation 24. Inside the pocket 26, the locking means 12, 12a, 12b is protected from external environmental influences. Furthermore, the risk is reduced that the locking means 12, 12a, 12b become wedged when moving from the release position into the locking position or from the locking position into the release position.

In the embodiments shown in Figures 1 to 17, this is

Locking means 12, 12a, 12b for the movement from the release position into the

The locking position is arranged on the housing 2 so as to be movable in particular in the assembly direction M and is arranged on the housing 2 so as to be movable in particular against the assembly direction M for the movement from the locking position into the release position.

According to an alternative, not shown embodiment of the invention, the locking means 12 is designed as a rotatable eccentric with an axis of rotation longitudinally in the assembly direction M. For the movement from the release position into the locking position and from the locking position into the release position, the rotatable eccentric is arranged on the housing 2 so that it can rotate about the axis of rotation.

According to a further embodiment, the movement of the

Locking means 12, 12a, 12b from the release position into the locking position

The receiving circumference of the housing 2 is at least partially enlarged. The

The locking position as well as the resulting increase in size can be seen in the detailed views according to FIGS. 3, 7, 10 and 16. Because the The receiving circumference of the housing 2 is at least partially enlarged, the housing 2 is at least partially perpendicular to the assembled state

Mounting direction M braced against an inside 16 of the mounting opening 4. In order to be able to remove the housing 2 from the assembly opening 4 again, the movement of the locking means 12, 12a, 12b from the locking position to the release position reduces the receiving circumference of the housing 2 at least partially.

As FIGS. 2, 6, 9 and 15 show, the housing 2 has an interior 2a. The invention advantageously makes it possible to make the interior 2a of the housing 2 very generous so that any measuring devices can be conveniently placed in the interior 2a of the housing 2. This is achieved in that the locking means 12, 12a, 12b, in order to interact with the housing 2, only take up a small amount of space in the housing 2 both for the movement from the release position into the locking position and in particular for the movement from the locking position into the release position claim.

In a first and fifth embodiment of the measuring device according to the invention, the housing 2 has at least one elastic clamping arm 18a in the area of the locking means 12, 12a, 12b. These designs are illustrated in FIGS. 1 to 4 and 14 to 16. As an alternative, it is also possible to distribute a plurality of elastic clamping arms 18a over the circumference of the housing 2, as for example in the second embodiment shown in FIGS. 5 to 7 and the fifth embodiment shown in FIGS. 14 to 16 is running. The clamping arm 18a extends from a beginning formed integrally on the housing 2 against the assembly direction M to an open end 20a. The opened end 20a protrudes from the housing 2 perpendicular to the assembly direction M.

The first embodiment of the housing 2 according to FIGS. 1 to 4 and the fifth embodiment of the housing 2 according to FIGS. 14 to 16 differ essentially in that the housing 2 according to the fifth embodiment extends, in particular, slightly into the assembly opening 4 in the assembly direction M and at its end pointing against the assembly direction M is advantageous Has cover element 74 which closes the housing 2 and the assembly opening 4. Furthermore, the housing 2 according to the fifth embodiment preferably has two elastic clamping arms 18a.

The cover element 74 is preferably formed monolithically in one piece with the rest of the housing 2 or, in particular, is integrally connected to the rest of the housing 2 in a materially bonded manner.

As shown in Figures 2, 3, 15 and 16, the clamping arm 18a is in the locking position on the locking means 12, 12a, 12b so that by means of the

Movement, in particular in the assembly direction M, of the locking means 12, 12a,

12b, from the release position to the locking position, the receiving circumference is enlarged at least in the area of the open end 20a. As can be seen in the figures, the locking means 12, 12a, 12b produces a spreading effect on the clamping arm 18a, whereby the above-described effect is produced.

In the assembled state shown in FIGS. 1 to 4, the open end 20a is braced at least partially perpendicular to the assembly direction M against the inside 16 of the assembly opening 4. To the housing 2 starting from the

The assembled state can be removed from the assembly opening again by means of the movement of the locking means 12, 12a, 12b from the locking position into the release position of the receiving circumference of the housing 2 by an elastic

Deformation of the clamping arms 18a is reduced again. In this state, the housing 2 can be removed from the assembly opening 4 counter to the assembly direction M and the housing 2 can be easily removed from or inserted into the assembly opening 4.

As shown in FIGS. 3, 13 and 16, the clamping arm 18a preferably has at least one latching step 22 at its open end 20a for resting against an inside of the switch panel 1, the length of which in the assembly direction M is designed such that the distance between the latching step 22 to the support surface 10 enables a mounting of the switchboard 1 between the mounting surface 10 and the locking step 22 without play. The control panel 1 has a wall thickness D due to the design. The latching step 22 here has two surfaces, a first step surface and a second step surface. The first step surface extends parallel to the inner surface 16 of the

Mounting opening 4. The second step surface is perpendicular to the first

Step surface from the first step surface. In the assembled state, the first step surface is clamped perpendicular to the assembly direction M against the inner surface 16 of the assembly opening 4 by the locking means 12, 12a, 12b. At the same time, the second step surface is displaced perpendicular to the mounting direction M into an area behind the mounting opening 4 when viewed in the mounting direction M due to the enlargement of the receiving circumference of the housing 2.

According to an alternative embodiment, the clamping arm 18a is designed such that the clamping arm 18a is not perpendicular to the mounting direction M against the

Mounting opening 4 is clamped, but is displaced with an end face perpendicular to the mounting direction M into an area behind the mounting opening 4, viewed in the mounting direction M, due to the enlargement of the receiving circumference of the housing 2, thereby supporting the housing 2 against the mounting direction M on the control panel 1.

In an advantageous development of the invention, the clamping arm 18a has at its open end 20a at least one second latching step 22n, the length of which in the assembly direction M is designed such that the distance between the respective further latching step 22n and the support surface 10 accommodates an alternative that is thicker in terms of value Control panel 1 between receiving surface 10 and further locking steps 22n allows play-free. This further latching step 22n is designed for a larger wall thickness Dn in terms of value of an alternative control panel.

According to a particularly preferred embodiment, the clamping arm 18a, as shown in FIGS. 3, 13 and 16, has two locking steps 22, 22n. In a further embodiment, the clamping arm 18 has three latching steps 22, 22n at a distance of preferably 1 mm, which makes the housing 2 particularly suitable for installation in switchboards 1 with wall thicknesses D, Dn of 2 to 4 mm. Here, the first locking steps 22 following locking steps 22 n with respect to a first and a second step surface and their mode of operation each formed identically with the only difference that each latching step 22, 22n to another

Control panel 1 is fitted.

The latching steps 22, 22n are preferably arranged in a staircase-like manner, as shown in FIGS. 3, 13 and 16, at the open end 20a of the clamping arm 18a. Here, the first latching step 22 in the assembly direction M is designed as the foremost first latching step 22 for the smallest wall thickness D in terms of value, each downstream latching step 22n arranged in a step-like manner in the assembly direction M being designed for a next greater wall thickness. In particular, the latching steps 22, 22n merge directly into one another, as a result of which the longitudinal extent of the entire step arrangement in the assembly direction M can be reduced. For this purpose, the second step surface is connected to the first step surface of the locking step 22n downstream in the assembly direction M. This compact and stair-like step arrangement is implemented in the embodiment shown in FIGS. 3, 13 and 16.

Preferably, the depth T of the housing gradation 24 is reduced over the course of the housing gradation 24 in the assembly direction M in a ramp section 28. This causes the locking means 12, 12a, 12b to move out of the

Release position in the locking position via the ramp-like course of the

Ramp section 28 is guided perpendicular to the assembly direction M to the outside. In principle, it is also possible to optimize the first and fifth embodiment of the invention, which is shown in FIGS. 1 to 4 and 14 to 16 without a ramp section 28, additionally with a ramp section 28 in order to increase the spreading effect on the clamping arms 18a . In particular, they are

Housing gradation 24 and the ramp section 28 necessary to carry out the second and third embodiment of the invention.

In a second preferred embodiment of the invention, which, as already described above, has a housing step 24 with a ramp section 28 and a locking means 12, 12a, 12b movable in and against the assembly direction M, at least one elastic clamping arm 18b extends in the area of the locking means 12, 12a, 12b of one with the circumference of the housing 2 in one piece molded beginning in the assembly direction M into the assembly opening 4 to an open end 20b. In the one shown in FIGS. 5 to 7

In the exemplary embodiment, the housing 2 has two clamping arms 18b, with a clamping arm 18b similar to that shown in FIGS. 1 to 4

Embodiment is possible. It may also be necessary or beneficial if more than two, for example three or four, clamping arms 18b, each with a housing step 24, are arranged distributed around the circumference of the housing 2.

According to the second embodiment, the clamping arm 18b rests against the locking means 12, 12a, 12b in the locking position. By moving the locking means 12, 12a, 12b from the release position into the locking position, the receiving circumference is enlarged at least in the area of the ramp section 28 of the housing step 24. As shown in Figures 6 and 7, the respective ramp section 28 corresponds to the locking means 12, 12a, 12b in such a way that the

Clamp arm 18b in the assembled state at least partially perpendicular to

Mounting direction M is braced against the inside 16 of the mounting opening 4. It is precisely this assembled state of the second embodiment that is shown in FIGS. 6 and 7.

To remove the housing 2 from the assembly opening 4, starting from the assembled state, the movement of the locking means 12, 12a,

12b, the receiving circumference of the housing 2 is reduced from the locking position to the release position by an elastic return deformation of the clamping arms 18b, so that the housing 2 can be removed from the assembly opening 4 against the assembly direction M.

In the second embodiment, the movement of the locking means 12, 12a, 12b from the release position into the locking position corresponds to a movement of the

Locking means 12, 12a, 12b relative to the housing in the assembly direction M.

On the other hand, the movement of the locking means 12, 12a, 12b from the locking position into the release position corresponds to a movement of the locking means 12, 12a, 12b relative to the housing opposite to the assembly direction M. In a third preferred embodiment of the invention, which, as already described above, has a housing step 24 with a ramp section 28 and a locking means 12 movable in and against the mounting direction M, the locking means 12 has elastic stop elements 30 on a surface facing outwards perpendicular to the mounting direction M on. The third embodiment is shown in FIGS. 8 to 10. Different from the first and second

Embodiment, no clamping arm 18a, 18b is required in the third embodiment.

The elastic stop elements 30 are arranged in such a way that, in the locking position, the control panel 1 is arranged between the stop elements 30 and the support surface 10. This described locking position in the assembled state can be seen in FIGS. 9 and 10. In this case, in an assembled state, the locking means 12 is braced at least partially perpendicular to the assembly direction M directly against the inside 16 of the assembly opening 4.

As already explained for the first and second embodiment of the invention, the number and the distribution of the locking means 12 over the circumference of the housing 2 is variable and can depending on the installation conditions in the

Manufacturing process of the measuring device or the housing 2 are taken into account.

During the movement of the locking means 12 from the release position into the locking position, the locking means 12 slides over the ramp-like course of the ramp section 28 and is guided perpendicular to the assembly direction M to the outside. As a result, the stop elements 30 are arranged in an area which, viewed in the assembly direction M, is perpendicular to the assembly direction M behind the assembly opening 4.

In the assembled state, the control panel 1 is thereby embedded between the stop elements 30 and the support surface 10, and a movement of the housing against the assembly direction M out of the assembly opening 4 is prevented.

The stop elements 30 are advantageously designed to be elastic in such a way that they adapt to different wall thicknesses D, Dn of different switchboards 1, so that the measuring device is universal for different switchboards 1 is removable. An alternative in this regard are adaptable stop elements 30 which are only adapted at the installation site. For this purpose, several stop elements 30 are formed in a row, as shown in FIGS. 9 and 10, on the surface of the locking means 12. At the installation site, you can remove individual

Stop elements 30, e.g. B. cutting or filing, the housing 2 can be adapted to the actually existing wall thickness D, Dn of the control panel 1.

In the third embodiment, the locking means 12 is moved from the locking position into the release position for dismantling the measuring device. Here, the dismantling must move the locking means 12 against the assembly direction M relative to the housing 2, depending on the elastic design of the

Stop elements 30 must be overcome a certain release force. As soon as this has happened, the locking means 12 slides against the assembly direction M over the ramp-like course of the ramp section 28 and is guided inwards perpendicular to the assembly direction M. This reduces the

Recording scope, and a safe removal of the housing 2 from the

Mounting opening 4 is possible.

In particular in the first, second, third and fifth embodiment, the locking means 12 is designed as a wedge 12a, 12b. As shown in FIGS. 3, 13 and 17, the wedge 12a, 12b has a flat side 32 pointing inward perpendicularly to the assembly direction M and a wedge side 34 opposite the flat side 32. In FIGS. 3, 13 and 17 it is shown how, in the assembled state, the wedge side 34 rests correspondingly on the clamping arm 18a, 18b and presses it outwards, in particular perpendicular to the assembly direction M. The flat side 32 rests on the housing step 24 as shown. When the wedge 12a, 12b moves in or against the assembly direction, the wedge 12a, 12b slides with the flat side 32 over the housing step 24 and rests with the wedge side 34 on the clamping arm 18a, 18b. In the area of the end of the wedge 12a, 12b pointing in the assembly direction M, the wedge side 34 has a first ramp-shaped transition piece 36 at which the wedge side 34 and the flat side 32 converge. The first transition piece 36 advantageously enables the wedge 12a, 12b to be inserted into the pocket 26. Furthermore, the ramp shape at the end prevents it of the wedge 12a, 12b that the wedge 12a, 12b wedges relative to the housing 2 when moving in the assembly direction M. Another benefit of the

Ramp shape at the end of the wedge 12a, 12b is that the spreading parameters, e.g. B. the expansion path perpendicular to the assembly axis of the clamping arm 18a, 18b, depending on the movement of the wedge 12a, 12b in the assembly direction M can be adjusted by a clamping arm 18a, 18b.

The wedge side 34 preferably has a second ramp-shaped transition piece 38. As a result, the wedge 12a, 12b, viewed in the assembly direction M, has a height H1 measured perpendicular to the assembly direction M after the second transition piece 38, which is less than a height H2 of the wedge 12a, 12b measured perpendicular to the assembly direction M, viewed in the assembly direction M before the second Transition piece 38. The rigidity of the wedge 12a, 12b can advantageously be adjusted over its extension in the assembly direction M. In particular, if a ramp section 28 is arranged in the housing step 24, the wedge 12a, 12b can be adjusted elastically in such a way that it can optimally adapt to its movement from the release position to the locking position and vice versa. The wedge 12a, 12b advantageously has a stiff section in front of the second transition piece 38, which preferably protrudes from the housing 2 at least partially against the assembly direction M in the locking position. This section can preferably be used to move the wedge 12a, 12b in or against the assembly direction M by hand or with a tool.

The wedge 12a, 12b preferably has, as shown in FIGS. 11 and 17, two parallel side walls 40 running in the assembly direction M. These side walls 40 connect the flat side 32 and the wedge side 34 and furthermore each have an elastic barb 42 on the end of the wedge 12a, 12b pointing in the assembly direction M. These preferably protrude from the respective side wall 40 directed against the assembly direction M. Figure 12 shows a housing 2 in a side view with a wedge 12a, 12b in the locking position, which on the

Side surfaces 40 barbs 42 has formed. With the barbs 42, the wedge 12a, 12b has an anti-loss device. By having the barbs 42 in

Release position on the support surface 10 of the housing 2, the wedge 12a, 12b held in the pocket 26 and cannot become detached from the measuring device even in a dismantled state. In practice, this simplifies the assembly and the manufacturing process in such a way that the locking means 12, 12a, 12b, in particular the wedge 12a, 12b, can be manufactured separately from further housing parts. For delivery or only at the installation site, the wedge 12a, 12b is arranged on the housing 2 and movably supported in its intended position with the barbs 42 as described above.

Preferably, as shown in FIGS. 11 and 17, the barbs 42 have an angled insertion section 44 towards the end of the wedge 12a, 12b pointing in the assembly direction M. In this, the distance between the two opposing barbs 42 decreases in the assembly direction M. The insertion sections 44 are preferably of the two opposing ones

Barbs 42 aligned with one another at an angle α of 140 ° to 10 °, preferably 100 ° to 20 ° and most preferably 70 ° to 40 °. The insertion sections 44 simplify the assembly and reduce the risk of the wedge 12a, 12b jamming during its movement in or against the assembly direction M.

Preferably, the side walls 40, viewed in the assembly direction M, have recesses 46 immediately in front of the barbs 42, as shown in FIG. Here, the barbs 42 protrude at least partially beyond the recesses 46 against the mounting direction M, the barbs 42 being designed to be elastic in such a way that the barbs 42 are pushed into the by an externally acting force

Recesses 46 can be elastically deformed. Due to the elastic

Deformation of the barbs 42 in the recesses 46 reduces the projected cross section perpendicular to the assembly direction of the wedge 12a in the area of the barbs 42, and the wedge 12a can be arranged more easily on the housing 2.

According to a further advantageous embodiment, the wedge 12b has two in

Slits 72 extending in the assembly direction M and open in the assembly direction M are formed. This embodiment of the wedge 12b is shown in FIG. The slots 72 preferably each separate one perpendicular to the

Mounting direction M elastic locking arm 47. In particular, the side walls go 40 viewed in the assembly direction M directly into one locking arm 47 each. Appropriately, the latching arms 47 have exposed ends pointing in the assembly direction M, on which in particular the barbs 42 are formed. The latching arms 47 are advantageously designed to be elastic such that the distance between the two opposing barbs 42 can be deformed by an externally acting force on the distance between the side walls 40.

FIG. 13 shows a preferred embodiment of the wedge 12a, in which a locking seam 48 is formed on the flat side 32. Here, the locking seam 48 locks the wedge 12a in the locking position with a correspondingly designed locking groove 50 in the housing 2. In the locking position, the locking seam 48 lies in the locking groove 50, and for a movement of the wedge 12a from the locking position into the release position, for example for dismantling the measuring device, the person dismantling must move the wedge 12a against the assembly direction M relative to the housing 2, whereby depending on the design of the locking seam 48 and the locking groove 50, in particular in the geometric and elastic form, a certain release force must be overcome. As soon as this has happened, the wedge 12a slides with its flat side 32 against the mounting direction M via the housing step 24 from the locking position into the release position. This embodiment is also applicable to the wedge 12b according to the embodiment shown in FIGS. 15 to 17.

In an advantageous embodiment of the invention, a locking seam 48 is formed on the wedge side 34 of the wedge 12a, 12b. This embodiment is shown in FIGS. 16 and 17. The locking seam 48 is advantageous in an assembled state at least against the assembly direction M directly against the

Support surface 10 of the housing 2 braced bar.

So that the travel of the wedge 12a, 12b is limited in the assembly direction M and the wedge 12a, 12b assumes a defined and repeatable locking position, the wedge 12a, 12b preferably has support arms with support surfaces at its end pointing against the assembly direction M. Here, the support surfaces point in the assembly direction M and run perpendicular to the side walls 40 Support surfaces are preferably designed such that the support surfaces in

The locking position rest on at least one surface 56 of the housing 2 facing against the assembly direction M.

In a fourth embodiment of the measuring device, the locking means 12 is a rotatable eccentric with an axis of rotation longitudinal in the assembly direction M.

educated. This is arranged on the housing 2 so as to be rotatable about the axis of rotation for the movement from the release position into the locking position and from the locking position into the release position. The rotatable eccentric has an eccentric element protruding into the assembly opening 4 in the assembled state. Preferably, the rotation of the eccentric increases the size of the receptacle at least partially. The eccentric element can itself be designed such that the

The eccentric element itself is braced against the inside 16 of the mounting opening 6, or with a clamping arm which is integrally formed on the housing 2. This can in particular be designed in a manner described above for the first and second embodiment. It is advantageous here if the rotatable eccentric in the area of a housing step 24 without a

Ramp section 28 is arranged on housing 2.

In a preferred embodiment of the fourth embodiment, an elastic clamping arm extends in the area of the rotatable eccentric from a beginning formed integrally with the circumference of the housing 2 into the

Mounting direction M towards an open end or against the mounting direction M towards an open end. The direction of extension of the clamping arm of the fourth embodiment can accordingly correspond to the design of the

Be formed clamping arms of the first and second embodiment. In this case, the clamping arm rests against the eccentric element in the locking position and, in an assembled state, is braced at least partially perpendicular to the assembly direction M against an inner side 16 of the assembly opening 4.

In Figure 4, a particularly advantageous embodiment of the housing 2 is shown, which is equally applicable to the first to fifth embodiment. On the circumference of the housing 2 is at least one bearing groove 58, having one Bearing base 60, a first one extending perpendicular to the bearing base 60

Support wall 62 and a second securing wall 64 extending parallel to support wall 62 are formed. Here, the base 60 connects the

Support wall 62 and the fuse wall 64. The support wall 62 extends, as shown, in the same plane as the support surface 10 of the housing 2. The fuse wall 64 is arranged opposite the support wall 62 spaced apart such that the control panel 1 in the mounted state in the bearing groove 58 between Support wall 62 and securing wall 64 is ordered and at least on the support wall 62 and the bearing base 60 rests. Practically, a holder for the housing 2 on the control panel 1 is created by this embodiment. This makes it possible to reduce the number of locking means required, as in the

Figures 1 to 4 shown to be reduced to a locking means 12, 12a, 12b and thereby in particular the interior 2a of the housing 2 very generously

design trainees so that any measuring devices can be conveniently placed in the interior 2a of the housing 2.

For universal usability of the housing 2, the support wall 62 is

Measured perpendicular to the bearing base 60, it is preferably further spaced from the bearing base 60 and is larger in area than the securing wall 64. This increases the bearing surface 62, making the housing 2 more secure in the

Mounting opening 4 can be positioned. In particular, the distance between the support wall 62 and the securing wall 64 is preferably greater than or equal to the greatest wall thickness D, Dn of a switchboard 1 that is potentially to be mounted. It has been shown that the distance 6 mm to 1 mm, in particular 4 mm to 2 mm, is preferable.

For all embodiments, the housing 2 preferably has, in the area of the locking means 12, 12a, 12b arranged on the circumference of the housing 2, an opening 66 running in the assembly direction M, which passes through the support surface 10 or divides the support surface 10. The locking means 12, 12a, 12b protrudes through the opening 66 in this embodiment

Assembly opening 4 into it. In order to keep dirt and foreign bodies away, the cross-sectional area corresponds perpendicular to the mounting direction M of the locking means 12, 12a, 12b in the area of the support surface 10, at least in the locking position of a surface perpendicular to the assembly direction M of the opening 66.

This embodiment can particularly advantageously correspond to a wedge 12a, 12b which has elastic barbs 42. When the wedge 12a, 12b is introduced in the assembly direction M through the opening 66 into the

In the assembly opening 4, the barbs 42 are deformed through the opening 66 and preferably pressed into the recesses 46. If the wedge 12a, 12b has been moved so far in the assembly direction M relative to the housing 2 that the barbs 42, viewed in the assembly direction M, lie behind the opening 66 and the support surface 10, the barbs 42 are elastically re-deformed enlarged in relation to the mounting direction M of the wedge 12a, 12b in the area of the barbs 42, and the wedge 12a, 12b is held on the housing 2 without loss.

“Loss-proof” is to be understood to mean that the wedge 12a, 12b cannot completely separate from the housing 2 by itself. The barbs 42 can be pressed together by external influence, whereby the projected

Cross-sectional area perpendicular to the mounting direction M of the wedge 12a, 12b is reduced again and corresponds at most to the cross-sectional area perpendicular to the mounting direction M of the opening 66.

In all embodiments, the locking means 12, 12a, 12b preferably has a release grip 68 on its end pointing against the assembly direction M. This is preferably as a groove or an opening perpendicular to the

Mounting direction M for a release tool, in particular a screwdriver, formed. In particular, the release grip 68 shown in FIG. 11 is designed as an opening, whereas FIG. 13 is designed as a groove

Release attack 68 shows. For the function and simple handling, it is important that the release grip 68 can be easily reached from an area outside the assembly opening 4 and preferably protrudes out of the housing 2 against the assembly direction M. The fitter can easily put his release tool on, and the risk of damaging the housing 2 or the control panel 1 is reduced. Alternatively, rotatable locking means can also have a release handle 68 in the form of a tool. An external or internal hexagonal profile or a cross or slot profile should be mentioned as examples.

The support surfaces 10 of the first to fifth are helpful for dismantling

Embodiment preferably at least one point on the circumference of the

Housing 2 interrupted. In particular, the support surface 10 is interrupted in the area of the locking means 12, 12a, 12b. In this case, the interrupted area in each case forms a set back engagement groove 70, which is preferably in such a way

is set back that between the engagement groove 70 and the control panel 1 a gap for a release tool, in particular a screwdriver, is formed. In practice, it often happens that the housing 2 has got stuck in the mounting opening 4 or the dismantling can only grasp the housing 2 with difficulty and move it against the mounting direction M due to the design of the measuring device. It is therefore advantageous if the person dismantling can place a release tool in the gap on the set-back engagement groove 70 in order to easily lever the measuring device or the housing 2 out of the assembly opening 4.

The invention is not limited to those shown and described

Embodiments are limited, but also includes all embodiments that have the same effect within the meaning of the invention. It is emphasized that the

Embodiments are not limited to all features in combination; rather, each individual partial feature can also be detached from all others

Part features have an inventive significance for themselves. Furthermore, the invention has not yet been restricted to the combination of features defined in claim 1, but can also be defined by any other combination of specific features of all of the individual features disclosed. This means that in principle practically every single feature of claim 1 is omitted or by at least one at a different point in the

Application disclosed individual feature can be replaced. List of reference symbols

1 control panel

2 housings

2a interior

4 mounting opening

10 support surface

12 locking devices

12a, 12b wedge

16 Inside of the mounting opening

18a, 18b clamp arms

20a, 20b open end

22, 22n rest steps

24 Housing graduation

26 bag

28 ramp section

30 stop elements

32 flat side

34 wedge side

36 First transition piece 38 Second transition piece 40 Side walls

42 barbs

44 lead-in section

46 recesses

47 locking arm

48 bartack seam

50 locking groove

56 Housing surface

58 bearing groove

60 storage reason

62 support wall

64 Security wall 66 breakthrough

68 Release Attack

70 attack groove

72 slot

74 cover element

D, Dn wall thickness

H1, H2 height

M mounting direction

T depth

Claims

Expectations

1. Measuring device for installation in a control panel (1) of a vertical or

Medium-voltage system with a housing (2) for installation in a

Mounting opening (4) of the control panel (1), the housing (2) having at least one support surface (10) running perpendicular to an mounting direction (M) for resting on the control panel (1) in the edge region of the mounting opening (4), the housing (2) has at least one locking means (12, 12a, 12b) arranged movably on the circumference, which is arranged movably on the housing (2) relative to the housing (2) in such a way that the locking means (12, 12a, 12b) is out of a locking position can be moved into a release position and back, the housing (2) being clamped in the locking position in the assembly opening (4) and being removable from the assembly opening (4) in the release position,

characterized in that

the housing (2) in the area of the locking means (12, 12a, 12b) has a housing step (24) running in the assembly direction (M), which with a depth (T) perpendicular to the assembly direction (M) into the housing ( 2) protrudes and forms a pocket (26), the locking means (12, 12a, 12b) being movably mounted in the pocket (26).

2. Measuring device according to claim 1,

characterized in that the locking means (12, 12a, 12b) for the movement from the release position into the locking position is arranged on the housing (2) so as to be movable in the assembly direction (M) and for the movement from the locking position into the release position against the assembly direction ( M) is arranged movably on the housing (2).

3. Measuring device according to claim 1,

characterized in that the locking means (12) is designed as a rotatable eccentric with an axis of rotation longitudinally in the assembly direction (M) and is rotatable about the axis of rotation on the housing (2) for the movement from the release position to the locking position and from the locking position to the release position is arranged.

4. Measuring device according to one of claims 1 to 3,

characterized in that by means of the movement of the locking means (12, 12a, 12b) from the release position into the locking position

The receiving circumference of the housing (2) is at least partially enlarged, so that in the assembled state the housing (2) is at least partially clamped perpendicular to the assembly direction (M) against an inside (16) of the assembly opening (4), and by means of the movement of the locking means ( 12, 12a, 12b) from the locking position to the release position of the recording scope of the

Housing (2) is at least partially reduced.

5. Measuring device according to claim 4,

characterized in that the housing (2) has formed at least one elastic clamping arm (18a) in the area of the locking means (12, 12a, 12b), one of which is integral with the housing (2)

formed at the beginning against the assembly direction (M) to one

open end (20a) extends, and the open end (20a) protrudes perpendicular to the assembly direction (M) from the housing (2), the clamping arm (18a) in the locking position rests against the locking means (12, 12a, 12b), so that by means of the movement of the locking means (12, 12a, 12b) from the release position to the locking position, the receiving circumference is increased at least in the area of the open end (20a), and the open end (20a) in the assembled state is at least partially perpendicular to the assembly direction ( M) is braced against the inside (16) of the mounting opening (4), and by means of the movement of the locking means (12, 12a, 12b) from the locking position to the release position of the receiving circumference of the housing (2) by an elastic Deformation of the clamping arms (18a) is reduced, so that the housing (2) against the assembly direction (M) out of the assembly opening (4)

is removable.

6. Measuring device according to claim 5,

characterized in that the clamping arm (18a) has at its open end (20a) to rest against an inside of the control panel (1) at least one latching step (22), the length of which in the assembly direction (M) is designed such that the distance between the latching step (22) allows the control panel (1) to be accommodated on the support surface (10) between the accommodation surface (10) and the locking step (22) without play.

7. Measuring device according to claim 6,

characterized in that the clamping arm (18a) at its open end (20a) has at least one second latching step (22n), the length of which in the assembly direction (M) is designed in such a way that the distance between the respective further latching step (22n) and the support surface ( 10) enables an alternative switchboard (1), which is thicker in terms of value, to be accommodated between the mounting surface (10) and further locking steps (22n) without play.

8. Measuring device according to claim 7,

characterized in that three locking steps (22, 22n) are formed at a distance of preferably 1 mm for switchboards (1) with wall thicknesses (D, Dn) of 2 mm to 4 mm.

9. Measuring device according to one of claims 1 to 8,

characterized in that the depth (T) of the housing gradation (24) decreases over the course of the housing gradation (24) in the assembly direction (M) in a ramp section (28), so that the locking means (12, 12a, 12b) during the movement from the release position to the locking position via the ramp-like course of the ramp section (28) perpendicular to the

Assembly direction (M) is guided outwards.

10. Measuring device according to claim 9,

characterized in that at least one elastic clamping arm (18b) in the area of the locking means (12, 12a, 12b) of one with the

The circumference of the housing (2) extends in one piece at the shaped beginning, in particular from the support surface (10) of the housing (2), in the assembly direction (M) into the assembly opening (4) to an open end (20b), the clamping arm (18b ) in the locking position on the locking means (12, 12a) so that by means of the movement of the locking means (12, 12a) from the release position to the locking position, the receiving circumference at least in the area of

Ramps section (28) of the housing gradation (24) is enlarged, and the clamping arm (18b) in the assembled state is braced at least partially perpendicular to the assembly direction (M) against the inside (16) of the assembly opening (4), and by means of the movement of the locking means (12, 12a, 12b) from the locking position to the release position of the receiving scope of the

Housing (2) is reduced by an elastic return deformation of the clamping arms (18b), so that the housing (2) can be removed from the assembly opening (4) against the assembly direction (M).

11. Measuring device according to claim 10,

characterized in that the locking means (18) has elastic stop elements (30) on a surface facing outwards perpendicular to the assembly direction (M), which stop elements are arranged in such a way that in

In the locking position, the control panel (1) is arranged between the stop elements (30) and the support surface (10), the locking means (12) in an assembled state at least partially perpendicular to the assembly direction (M) directly against the inside (16) of the assembly opening (4) ) is tense.

12. Measuring device according to one of claims 1 to 11,

characterized in that the locking means (12) as a wedge (12a,

12b) is formed, which has a flat side (32) pointing inwards perpendicular to the assembly direction and one of the flat side (32)

opposite wedge side (34), the wedge side (34) having a first ramp-shaped transition piece (36) in the area of the end of the wedge (12a, 12b) pointing in the assembly direction (M), on which the wedge side (34) and the flat side ( 32) converge.

13. Measuring device according to claim 12,

characterized in that the wedge side (34) has a second

has ramp-shaped transition piece (38), whereby the wedge (12a, 12b) viewed in the assembly direction (M) has a height (H 1) measured perpendicular to the assembly direction (M) after the second transition piece (38), which is less than a perpendicular to the Mounting direction (M) measured height (H2) of the wedge (12a, 12b), viewed in the mounting direction (M) in front of the second transition piece (38).

14. Measuring device according to claim 12 or 13,

characterized in that the wedge (12a, 12b) has two parallel side walls (40) connecting the flat side (32) and the wedge side (34) and running in the assembly direction (M), with the end facing in the assembly direction (M) Wedge (12a, 12b) the side walls (40) each have an elastic barb (42) which is supported by the respective

Side wall (40) protrude directed against the assembly direction (M) and rest in the release position on the support surface (10) of the housing (2).

15. Measuring device according to claim 14,

characterized in that the barbs (42) to the in the

Assembly direction (M) facing end of the wedge (12a, 12b)

have angled insertion portion (44), in which

Angled insertion section (44) reduces the distance between the two opposing barbs (42) in the assembly direction (M).

16. Measuring device according to claim 14 or 15,

characterized in that the side walls (40), viewed in the assembly direction (M), have recesses (46) immediately in front of the barbs (42), the barbs (42) at least partially over the

Recesses (46) protrude against the assembly direction (M), and the barbs (42) are designed to be elastic that the barbs (42) can be elastically deformed into the recesses (46) by an externally acting force.

17. Measuring device according to claim 14 or 15,

characterized in that the wedge (12b) has two slots (72) extending in the assembly direction (M) and open in the assembly direction (M), the slots (72) each having one perpendicular to the

Separate assembly direction (M) elastic Rastamn (47), whereby the

Side walls (40), viewed in the assembly direction (M), merge directly into a respective latching arm (47), the latching arms (47) having exposed ends pointing in the assembly direction (M) on which the

Barbs (42) are formed, the latching arms (47) being elastic in such a way that the distance between the two opposite barbs (42) can be deformed by an externally acting force on the distance between the side walls (40).

18. Measuring device according to one of claims 12 to 17,

characterized in that a locking seam (48) is formed on the flat side (32) of the wedge (12a, 12b), which with a correspondingly designed locking groove (50) in the housing (2) the wedge (12a) in the

Bolt position locked.

19. Measuring device according to one of claims 12 to 18,

characterized in that a locking seam (48) is formed on the wedge side (34) of the wedge (12a, 12b), which in an assembled state at least partially against the assembly direction (M) directly against the bearing surface (10) of the housing (2 ) can be clamped.

20. Measuring device according to one of claims 12 to 19,

characterized in that the wedge (12a, 12b) has support arms with support surfaces at its end pointing against the assembly direction (M), the support surfaces pointing in the assembly direction (M) and extending perpendicular to the side walls (40), and the support surfaces are designed in this way are that the support surfaces in the locking position rest on at least one surface (56) of the housing (2) facing against the assembly direction (M).

21. Measuring device according to one of claims 1 to 20,

characterized in that on the circumference of the housing (2) at least one bearing groove (58), having a bearing base (60), a first support wall (62) extending perpendicular to the bearing base (60) and a second support wall (62) extending parallel to the support wall (62) Securing wall (64) is formed, wherein the bearing base (60) connects the supporting wall (62) and the securing wall (64) and the supporting wall (62) extends in the same plane as the bearing surface (10) of the housing (2), and the

Securing wall (64) opposite the supporting wall (62) is arranged at such a distance that the control panel (1) in the mounted state in the bearing groove (58) between the supporting wall (62) and the securing wall (64) is arranged and rests at least on the support wall (62) and the bearing base (60).

22. Measuring device according to claim 21,

characterized in that the support wall (62) perpendicular to the

Bearing base (60) measured further apart from bearing base (60) and is larger in area than the securing wall (64), the distance between the support wall (62) and the securing wall (64) preferably being greater than or equal to the greatest wall thickness (D, Dn) a switch panel (1) that is potentially to be mounted, in particular the distance is 6 mm to 1 mm, preferably 4 mm to 2 mm.

23. Measuring device according to one of claims 1 to 22,

characterized in that the housing (2) has an opening (66) running in the assembly direction (M) in the area of the securing means (12, 12a, 12b) arranged on the circumference of the housing (2) and through the support surface (10) passes through or divides the support surface (10), and through which the locking means (12, 12a, 12b) protrudes into the mounting opening (4), the cross-sectional area preferably being perpendicular to the

The mounting direction (M) of the locking means (12, 12a, 12b) in the area of the support surface (10) corresponds to a surface perpendicular to the mounting direction (M) of the opening (66) at least in the locking position.

24. Measuring device according to one of claims 1 to 23,

characterized in that the locking means (12, 12a, 12b) has a release grip (68), in particular a groove, preferably an opening perpendicular to the end facing against the assembly direction (M)

Mounting direction (M) for a release tool, in particular one

Screwdriver, which protrudes against the mounting direction (M) from the housing (2).

25. Measuring device according to one of claims 1 to 24,

characterized in that the bearing surface (10) at at least one point on the circumference of the housing (2), in particular in the area of the

Locking means (12, 12a, 12b) is interrupted and the interrupted area each forms a set back engagement groove (70) and in particular is set back in such a way that between the engagement groove (70) and the

Control panel (1) a gap for a release tool, in particular one

Screwdriver, is formed.