CN209328777U - Display device for protective switch and protective switch - Google Patents

Abstract

The utility model relates to a kind of display devices (10) for being used for protective switch (1), the display device (10) is used to show the mode of operation of protective switch (1), the manipulation shaft member (3) that the protective switch (1) has shell (2) and supports with being able to rotate relative to the shell (2), wherein, the manipulation shaft member (3) can at least occupy scram position (71) by rotation, on-position (70), trip positions (73) and releasing position (72), wherein, the trip positions (73) and releasing position (72) are arranged between the scram position (71) and on-position (70).Furthermore the utility model relates to a kind of protective switchs (1) with display device (10), for showing the mode of operation of protective switch (1).

Description

Display device for protective switch and protective switch

technical field

The utility model relates to a display device for a protection switch. The display device is used for displaying the operating state of the protection switch. The shaft can be rotated to occupy at least an off position, an on position, a trip position and a release position, wherein the trip position and the release position are arranged between the off position and the on position, wherein the display device also has a scale element and a display element with a scale arrangement for a stationary arrangement of the scale element on the housing, which has a display arrangement for a rotationally fixed arrangement of the display element on the actuating shaft , and wherein, in a state where the display device is installed on the protection switch, the position of the display element relative to the scale element shows the rotational position of the manipulation shaft. The utility model also relates to a protective switch with a display device for displaying the operating state of the protective switch. The protective switch has a casing and a control shaft supported rotatably relative to the casing, wherein the control The shaft can be rotated to occupy at least an off position, an on position, a trip position and a release position, wherein the trip position and the release position are arranged between the off position and the on position, wherein the display device also has a scale element and a display element with a scale arrangement for a stationary arrangement of the scale element on the housing, which has a display arrangement for a rotationally fixed arrangement of the display element on the actuating shaft , and wherein the position of the display element relative to the scale element shows the rotational position of the manipulation shaft.

Background technique

Protective switches are known and widely used in modern technology. Switching elements such as switching contacts and fixed contacts are usually arranged inside the protective switch in order to be able to switchably establish an electrical connection. Furthermore, the known protective switches generally have a release mechanism, which triggers the separation of the two switching elements in the event of an overload, for example in the event of a brief or prolonged overcurrent. Devices operated in a correspondingly downstream circuit can thus be protected against overload and/or damage caused by such an overload by means of the protective switch. Most protective switches have a display device, for example a standardized display device, by means of which the internal state of the protective switch can be displayed. The display device is usually coupled mechanically to an actuating shaft of the protective switch, wherein the rotational position of the actuating shaft is in turn linked to the internal state of the protective switch.

In the case of release of the protective switch by means of a release mechanism, it is also known that this released state of the protective switch can be visualized outwardly by the actuating shaft of the protective switch in the tripped position. The tripping position is generally arranged between the on position of the actuating shaft and the off position, wherein the on position indicates to the user of the protective switch that the switching element is closed, and the off position indicates the presence of the switching element. Disconnected switching element. The problem that has emerged is that the overload can be so great that the switching elements inside the protective switch fuse together. In this case, the electrical connection is maintained even in the released state. However, it usually happens that in this special case an undefined state appears to the user to the outside, since neither a clear tripped state nor a clear disconnected state exists. The most unfavorable situation is that the disconnected state is shown to the user, but the switching element is still connected inside the protective switch.

Utility model content

Therefore, the technical problem to be solved by the present invention is to at least partially overcome the above-mentioned disadvantages in the display device and the protective switch. The technical problem to be solved by the invention is in particular to provide a display device for a protective switch and a protective switch which provide a release of the protective switch with fused switching elements in a simple and cost-effective manner Display of the status, wherein a false display of the disconnected status is especially reliably avoided.

The above technical problem is solved by a display device for a protective switch and a protective switch. Other characteristics and details of the utility model can be obtained from the description and the accompanying drawings. Here, features and details described in connection with the display device according to the invention also apply, of course, also in connection with the protective switch according to the invention, and correspondingly vice versa, so that with regard to the disclosure content of the individual subject matter of the invention always can refer to each other.

According to the first aspect of the utility model, the above-mentioned technical problems are solved by a display device for a protective switch, the display device is used for displaying the operating state of the protective switch, the protective switch has a housing and is rotatable relative to the housing Ground-supported operating shaft, wherein the operating shaft can occupy at least an off position, an on position, a trip position and a release position by rotation, wherein the trip position and the release position are arranged between the off position and the on position Between, wherein, the display device also has a scale element and a display element, the scale element has a scale arrangement device for arranging the scale element in a fixed position on the housing, and the display element has a display element for twisting the display element The display arrangement device is arranged on the operating side, and wherein, in the state where the display device is mounted on the protective switch, the position of the display element relative to the scale element shows the rotational position of the operating shaft. The display device according to the invention is characterized in that the display device has a force element which mechanically acts at least with the display element at least when the actuating shaft is in its release position when the display device is mounted on the protective switch. connected so that a torque is applied to the actuating shaft via the display element in the direction of the switched-on position.

The display device according to the invention is provided for use on or in a protective switch. Switching elements, in particular switching contacts and fixed contacts, are located inside the protective switch in order to be able to switchably establish an electrical connection. The switching state of the switching element inside the protective switch is displayed via the actuating shaft or the rotational position of the actuating shaft to the outside of the protective switch, in particular for displaying the switching state of the protective switch to a user of the protective switch, for example. The actuating shaft is in the ON position when the switch contacts are closed and in the OFF position when the switching element is open. In addition, such a protective switch has a release mechanism, which can automatically release the closed switching element, for example in the event of an overload, in order to prevent damage to electrical equipment in the subsequent circuit and in particular to prevent such an overload from posing a threat to the user.

During the normal release process, the shifting elements are separated from each other and this is shown outwards to the user by the actuating shaft, wherein the actuating shaft is in the tripped position, in particular by being in the off position and on Rotation between positions constitutes. In particular, the rotational position of the actuation shaft can be shown to the user by means of the display device according to the invention. For this purpose, the display device according to the invention has a scale element which can be arranged on the housing of the protective switch by means of the scale arrangement means. In other words, the scale element of the display device according to the invention can be arranged on the housing of the protective switch in such a way that the scale element does not follow this rotation when the actuating shaft rotates, but is arranged in a fixed position. on the casing. The display device according to the invention also has a display element which also has a display arrangement means which enables a rotationally fixed arrangement of the display element on the actuation shaft. In other words, the display element can be arranged on the actuating shaft by means of the display arrangement device in such a way that the entire display element follows the rotation of the actuating shaft. In this way, the relative position of the display element with respect to the scale element shows the state of the actuation shaft to the user particularly simply and clearly.

In addition to the tripped state already described above, the protective switch can assume a further released state in which the release mechanism has been activated, but the switching elements of the protective switch remain connected to each other, for example due to electric welding. Such a state of the protective switch is a particularly high risk for the user, since the switching element may not be disconnected despite the release of the release mechanism, ie despite the presence of an overload, for example. In this state, it is generally not guaranteed that the tripping position normally defined when the release mechanism is released is assumed by the actuating shaft. In particular, in order to avoid erroneous indication of the switched-off state by the switched-off position of the actuating shaft, it is essential for the invention that the display device according to the invention has a force element. The force element is mechanically connected at least to the display element at least when the actuating shaft is in its release position. The force element can then exert a force and thus a torque on the display element of the display device in such a way that the torque acts in the direction of the switched-on position of the actuating shaft. By arranging the display element on the actuating shaft by means of the display arrangement means, the torque also acts on the actuating shaft at the same time and thus at least initially turns the actuating shaft into the switch-on position. In other words, the actuating shaft is pivoted away from the off position by the force element. In this way it can be provided that, in the event of a release state of the protective switch, it is reliably avoided that an erroneous display of the shut-off state occurs. Overall it is thus possible to provide an increase in the operating safety of the protective switch, in which contact elements which have fused in particular within the protective switch can be reliably detected by displaying the release state by means of the display device according to the invention.

Particularly preferably, in the display device according to the invention it can also be provided that the force element is mechanically operatively connected to the scale element at least when the actuating shaft is in its release position in the mounted state of the display device on the protective switch. , so that a torque in the direction of the switched-on position is applied to the actuating shaft via the display element. In this way it can be provided that, when the actuating shaft is in its release position, the force element is mechanically connected not only to the display element but also to the scale element. In this way, additional holding points or holding elements, which are provided, for example by the housing, for supporting the force of the force element when torque is provided can be dispensed with. In this way it is possible to provide a particularly compact unit consisting of the display element, the scale element and the force element of the display device according to the invention, in particular independently of the remaining protective switches.

The display device according to the invention can also be designed in such a way that the force element is designed as a spring element, in particular as a helical spring. The spring element is a particularly preferred embodiment of the force element, since the spring element can be prestressed particularly simply and in particular by rotating the actuating shaft. In turn, the torque-generating force can be provided particularly simply by means of the helical spring.

Furthermore, in the display device according to the invention it can be provided that the force element is mechanically connected to the scale element and to the display element in order to exert Torque in the direction of the on position. Via this mechanical functional connection, the force element is supported, for example, on the housing of the protective switch, preferably on a scale element of the display device, and transmits the torque to the actuating shaft via the display element arranged in a rotationally fixed manner on the actuating shaft superior. By means of the mechanically active connection of the force element to the scale element and the display element in the off position and the release position of the actuation shaft, it can be provided particularly simply and reliably that the torque is applied to the actuation shaft at least in the release position. The direction of position is applied to the steering axis. If the tripped position of the actuating shaft is to be between the release position and the off position of the actuating shaft, it can be particularly preferably provided that in the tripped position a contact between the force element and the scale element or display element is also provided. Mechanical action connection. If the tripped position is to lie between the released position and the switched position, the mechanically active active connection is preferably broken there.

Furthermore, the display device according to the invention can be designed in such a way that when the actuating shaft is in its on position, the force element is mechanically separated from the scale element and/or from the display element in order to prevent movement in the direction of the on position. application of torque. In this way it can be ensured particularly simply that no torque is unnecessarily applied when the actuating shaft is in its switched-on position. The mechanical separation of the force element from the scale element and/or from the display element does not unnecessarily impede interruption of normal operation of the protective switch, in particular release in the event of an overload in which the actuating shaft moves from the ON position to the OFF position. Movement in the direction of the buckle position.

Furthermore, provision is made in the display device according to the invention for the scale element and/or the display element to have a reinforcing element, in particular a cylindrical reinforcing element. Via the force element, a force can be exerted on the scale element and/or the display element when torque is applied. In order to be able to absorb said forces particularly well, in this preferred embodiment of the display device according to the invention, the scale element and/or the display element can have reinforcing elements. By means of the reinforcing element, which is particularly preferably designed as a cartridge-shaped reinforcing element, it can be provided particularly simply that the scale element and/or the display element have a sufficiently high mechanical stability so that, for example, they do not deform when a force is applied by the force element. The mechanical stability and/or the integrity of the display device according to the invention can be provided particularly easily in this way.

Furthermore, the display device according to the invention can be designed in such a way that the scale element and/or the display element has a holding section for fixing the force element and/or for producing a mechanically active connection with the force element. Such a special holding section can also provide, for example, the establishment and release of a mechanically active connection between force element and scale element or display element. The holding section can be configured, for example, as a protruding holding collar and/or as a receptacle in the scale element and/or the display element that is shaped to fit the force element. In this way, a particularly secure holding of the force element in the display device according to the invention can be provided, in particular a slipping or other change of position of the force element inside the display device according to the invention can be prevented.

The display device according to the invention can also be designed in such a way that the scale element has a bearing section and the display element has an associated bearing section in order to mount the display element on the scale element in a rotatable manner. In this way, a rotation of the display element relative to the scale element can be provided in a particularly simple manner. An additional mounting device for providing a rotatable mounting of the display element relative to the scale element can thus be dispensed with.

Furthermore, the display device according to the invention is characterized in that the scale arrangement is at least partially designed for a form-fitting engagement in a position receptacle in the housing and/or the display arrangement is at least partially designed for a form-fitting Surrounds the steering shaft. In this way, for example, a secure and positionally fixed arrangement of the scale element on the housing can be provided particularly easily. A torsion-proof and at the same time secure arrangement of the display element on the actuation shaft can also be provided, for example in the case of a quadrangular actuation shaft, by a corresponding quadrangular receptacle as part of the display arrangement means.

Particularly preferably, it can be provided in the display device according to the invention that the scale arrangement means and the display arrangement means are designed to be adapted to standard display devices. According to the invention, a standard display device is to be understood as any other display device which is already installed, for example, in a protective switch. The installed display device also has scale arrangement means and display arrangement means. In particular, the scale arrangement and the display arrangement of the display device according to the invention are also adapted to the graduation arrangement and the display arrangement of a standard display device, so that a standard display device can be replaced by the display device according to the invention. The retrofitting of protective switches which already have a standard display device with the display device according to the invention can thus also be provided.

According to the second aspect of the utility model, the above-mentioned technical problems are solved by a protective switch having a display device for displaying the operating state of the protective switch, the protective switch has a housing and a rotatable position relative to the housing Supported actuating shaft, wherein the actuating shaft can take at least an off position, an on position, a trip position and a release position by rotation, wherein the trip position and the release position are arranged between the off position and the on position , wherein the display device also has a scale element and a display element, the scale element has a scale arrangement device for arranging the scale element in a fixed position on the housing, and the display element has a scale arrangement device for arranging the display element in a rotationally fixed manner The display arrangement means on the steering shaft, and wherein the position of the display element relative to the scale element shows the rotational position of the steering shaft. The protective switch according to the invention is characterized in that the display device is constructed according to the first aspect of the invention. The protective switch according to the invention therefore also has all the advantages which have already been explained in detail with respect to the display device according to the invention according to the first aspect of the invention. In particular, in the protective switch according to the present utility model according to the second aspect of the present utility model, by using the display device according to the present utility model according to the first aspect of the present utility model, it is ensured that no mistaken passage is made in the released state of the protective switch. The actuating shaft exhibits an off state in which the contact elements of the protective switch fuse together within the protective switch.

The protective switch according to the invention can be characterized in that the standard display device is replaced by the display device. In other words, in this particularly preferred embodiment of the protective switch according to the invention, the standard display device is replaced or retrofitted by the display device according to the invention according to the first aspect of the invention. Therefore, if the standard display device of the protective switch is replaced by the display device according to the present invention, it is also possible to provide all the functions according to the present invention with respect to the first aspect of the present invention in an already existing protective switch with a standard display device. The advantages of the display device have been described.

Description of drawings

Further advantages, features and details of the invention emerge from the following description, in which an exemplary embodiment of the invention is explained in detail with reference to the accompanying drawings. Components with the same function and mode of action in FIGS. 1 to 5 are each assigned the same reference numerals. In the diagram:

Figure 1 shows a front view of a scale element of a display device according to the present invention,

Figure 2 shows a rear view of a scale element of a display device according to the invention,

3 shows a front view of a display element of a display device according to the present invention,

4 shows a rear view of a display element of a display device according to the present invention,

FIG. 5 shows a protective switch according to the invention with a display device according to the invention,

Figure 6 shows an open view of a display device according to the invention,

FIG. 7 shows the display device according to the invention in the switched-on position,

FIG. 8 shows a perspective view of the display device of FIG. 7 according to the invention,

FIG. 9 shows a display device according to the invention in a released position,

FIG. 10 shows a perspective view of the display device according to the invention of FIG. 9 .

Detailed ways

A scale element 20 of a display device 10 according to the invention is shown in FIGS. 1 and 2 , wherein FIG. 1 shows a view of the top side of the scale element 20 , and FIG. 2 shows the bottom of the scale element 20 side view. The scale element 20 of the display device 10 according to the invention has, in particular, display markings 23 which, in the illustrated embodiment of the display device 10 according to the invention, show the on position 70, the tripped position 73 and the off position. position 71. Display element 30 (not shown) can be rotatably mounted on scale element 20 via bearing section 22 . The holding section 60 enables the holding of the force element 40 (not shown), wherein in particular a reinforcing element 50 is provided, by means of which the force exerted by the force element 40 can be reliably absorbed. It can be seen in particular in FIG. 2 that the scale element 20 of the display device 10 according to the invention can be arranged in a fixed position on the housing 2 (not shown together) of the protective switch 1 according to the invention by means of the scale arrangement means 21 .

3 and 4 show a display element 30 of a display device 10 according to the invention, FIG. 3 showing a view of the top side of the display element 30 , and FIG. 4 showing a view of the bottom side of the display element 30 . As already described with reference to FIGS. 1 and 2 , the support of the display element 30 on the scale element 20 (not shown together) can be realized by cooperating with the support section 32 . The display element 30 also has a holding section 60 for holding the force element 40 (not shown) or for producing a mechanically active connection with the force element 40 . In turn, the forces generated by the force element 40 can be absorbed by the stiffening element 50 . In particular, according to the display element 30 of the display device 10 of the present utility model, there is a display arrangement device 31, and the display arrangement device 31 can provide the entire display element 30 on the manipulation shaft 3 of the protection switch 1 (not shown together). Torsion-resistant arrangement. In this configuration, the display arrangement means 31 is designed as a quadrangular receptacle, which is designed, for example, as shown in FIG. out). In order to display the state of the protective switch 1 , precisely by manipulating the rotational state of the shaft 3 , the display element 30 also has an indicator element 33 , which displays the protection by its relative position with respect to the scale element 20 . Switching state of switch 1.

This is shown in particular in FIG. 5 , which shows a protective switch 1 according to the invention in a display device 10 according to the invention. The protective switch 1 is in the on state, which is indicated by the actuating shaft 3 in the on position 70 . The switched-on position 70 of the actuating shaft 3 is transmitted via the display arrangement means 31 to the display element 30 so that the indicator element 33 points to the corresponding display marking 23 of the switched-on position 70 . When the operating shaft 3 rotates, along with the change of switching state of the protection switch 1 , the indicating element 33 will continue to rotate and correspond to another display mark 23 of the scale element 20 , such as the tripping position 73 or the off position 71 . In order to prevent twisting of the scale element 20 of the display device 10 , the scale element 20 is arranged in a stationary manner on the housing 2 of the protective switch 1 , in particular via a scale arrangement 21 (not shown). Particularly preferably, scale arrangement means 21 and display arrangement means 31 are also designed in such a way that they are adapted to the design of standard display devices. In other words, the scale arrangement means 21 and the display arrangement means 31 of the display device 10 according to the invention are designed in the same manner as the corresponding arrangement means of a standard display device. In all protective switches 1 this can be provided by replacing the standard display device with the display device 10 according to the invention and thus retrofitting the protective switch 1 with the display device 10 according to the invention.

FIG. 6 shows a partial view of the inner construction of the display device 10 according to the invention, in which the scale element 20 and the force element 40 are shown in particular. In its preferred embodiment, the force element 40 is designed as a spring element 41 , in particular as a helical spring. The force element 40 is securely held on the scale element 20 by the holding section 60 on the scale element 20 . If the display element 30 (not shown together) is arranged rotatably on the scale element 20 , the actuation of the force element 40 , for example in the tripped position 72 , can be carried out via the holding section 60 present on the display element 30 . Follow-up of the shafts 3 (not shown together). The force element 40 is tensioned and thus exerts a force on the display element 30 which causes the display element 30 and the actuating shaft 3 (not shown together) connected thereto to the on-position 70 (not shown together). ) direction extrusion.

This is shown schematically in particular in FIGS. 7 to 10 , wherein in FIGS. Display device 1 in . 7 and 9 each show a plan view of a display device 10 according to the present invention, and FIGS. 8 and 10 show a perspective view of the display device 10 . The principle of the force element 40 in particular in combination with the retaining section 60 of the scale element 20 and of the display element 30 is thus made visible in FIGS. 8 and 10 . In FIGS. 7 and 8 , the display device 10 is in the switched-on position 70 , and the scale element 20 and the display element 30 of the display device 10 are thus also in the switched-on position 70 . In particular, the indicator element 33 of the display element 30 points to the corresponding display marking 23 of the switch-on position 70 of the scale element 20 . It can be seen in FIG. 8 that the retaining section 60 of the scale element 20 is in operative connection with the force element 40 , which is in turn designed as a helical spring element. However, the holding section 60 of the indicator element 30 is separated from the force element 40 so that no torque D is generated for the indicator device 10 and thus for the protective switch 1 (not also shown) in its on position 70 (not shown together).

The situation is different when protective switch 1 and display device 10 are thus also in tripped position 72 , as shown in FIGS. 9 and 10 . It can be seen in particular in FIG. 10 that in particular the holding section 60 of the display element 30 is now also in mechanical active connection with the force element 40 , so that a force is exerted on the display element 30 by the force element 40 in such a way that a torque D is generated such that The entire display element 30 and the actuating shaft 3 connected to the display element 30 attempt to rotate in the direction of the switch-on position 70 . In this way, it is reliably avoided that the status of protective switch 1 is incorrectly displayed in the event of a tripped state of protective switch 1 .

List of reference signs

1 protection switch

2 housing

3 control shaft

4-axis adapter

10 display device

20 scale elements

21 scale arrangement device

22 Support section

23 Show markers

30 display elements

31 Display Layout Devices

32 Mating support section

33 Indicator elements

40 force elements

41 spring element

50 reinforcement elements

60 holding section

70 ON position

71 Off position

72 Trip position

73 release position

D torque

Claims (12)

1. one kind is used for the display device (10) of protective switch (1), the display device (10) is for showing protective switch (1) Mode of operation, the manipulation shaft member that the protective switch (1) has shell (2) and supports with being able to rotate relative to the shell (2) (3), wherein the manipulation shaft member (3) can at least occupy scram position (71), on-position (70), trip positions by rotation (73) and releasing position (72), wherein the trip positions (73) and releasing position (72) are arranged in the scram position (71) Between on-position (70), wherein the display device (10) also has scale element (20) and display element (30), described Scale element has for scale element (20) position to be fixedly placed on the scale arranging devices (21) on shell (2), institute Stating display element has for display element (30) to be torsionally arranged in the display arranging devices manipulated on shaft member (3) (31), and wherein, in the state that the display device (10) is mounted on protective switch (1), display element (30) is opposite The turned position of manipulation shaft member (3) is shown in the position of scale element (20),

It is characterized in that,

The display device (10) has power element (40), is mounted on the shape on protective switch (1) in the display device (10) Under state, at least when the manipulation shaft member (3) is in its releasing position (72), the power element (40) mechanically at least with institute Display element (30) effect connection being stated, will be applied to the torque in the direction of on-position (70) with will pass through display element (30) It manipulates on shaft member (3).

2. display device (10) described in accordance with the claim 1,

It is characterized in that,

In the state that the display device (10) is mounted on protective switch (1), at least when the manipulation shaft member (3) is in it When in releasing position (72), the power element (40) mechanically acts on the scale element (20) and connecting, will pass through display Element (30) will be applied in manipulation shaft member (3) to the torque in the direction of on-position (70).

3. display device (10) according to claim 1 or 2,

It is characterized in that,

The power element (40) is configured to spring element (41).

4. display device (10) described in accordance with the claim 3, which is characterized in that the power element (40) is configured to spiral bullet Spring.

5. display device (10) described in accordance with the claim 1,

It is characterized in that,

When the manipulation shaft member (3) is in its scram position (71) and is in its releasing position (72), the power element (40) mechanically it is connected with the scale element (20) and with the display element (30) as land used, to apply to on-position (70) torque in direction.

6. display device (10) described in accordance with the claim 1,

It is characterized in that,

When the manipulation shaft member (3) is in on-position (70), the power element (40) is mechanically relative to the scale member Part (20) and/or from the display element (30) separate, to prevent the application of the torque to on-position (70) direction.

7. display device (10) described in accordance with the claim 1,

It is characterized in that,

The scale element (20) and/or display element (30) have fastening element (50).

8. display device (10) according to claim 7, which is characterized in that the scale element (20) and/or display member Part (30) has the fastening element (50) of tubular.

9. display device (10) described in accordance with the claim 1,

It is characterized in that,

The scale element (20) and/or the display element (30) have fixing section (60), and the fixing section (60) is used It is connected in the fixation power element (40) and/or for establishing with the mechanical effect of the power element (40).

10. display device (10) described in accordance with the claim 1,

It is characterized in that,

The scale element (20) has bearing section (22), and the display element (30) has cooperation bearing section (32), so that the display element (30) is supported on the scale element (20) with being able to rotate.

11. display device (10) described in accordance with the claim 1,

It is characterized in that,

The scale arranging devices (21) are at least partly configured to the position being shape-ordinatedly embedded in the shell (2) appearance It receives in portion and/or the display arranging devices (31) is at least partly configured to shape-ordinatedly surround the manipulation shaft member (3)。

12. one kind has the protective switch (1) of display device (10), the display device (10) is for showing protective switch (1) Mode of operation, the protective switch (1) has shell (2) and the control lever shaft that supports with being able to rotate relative to the shell (2) Part (3), wherein the manipulation shaft member (3) can at least occupy scram position (71), on-position (70), tripping position by rotation Set (73) and releasing position (72), wherein the trip positions (73) and releasing position (72) are arranged in the scram position (71) between on-position (70), wherein the display device (10) also has scale element (20) and display element (30), The scale element has the scale arranging devices for being fixedly placed on scale element (20) position on shell (2) (21), the display element has the display cloth for being torsionally arranged in display element (30) on manipulation shaft member (3) Device (31) are set, and wherein, display element (30) shows the manipulation shaft member (3) relative to the position of scale element (20) Turned position,

It is characterized in that,

The display device (10) constructs according to display device described in one of the claims (10).