CN215732341U - Plug-in module and plug-in type monitor - Google Patents

Abstract

The utility model discloses a plug-in module and a plug-in monitor, wherein the plug-in module comprises a groove for plugging a lug boss of the plug-in monitor, at least two first conductive parts are arranged in the groove, and the at least two first conductive parts are electrically connected with second conductive parts in the lug boss of the plug-in monitor in a one-to-one correspondence manner. The plug-in monitor is provided with a plug-in box, the plug-in box is used for electrically connecting a plug-in module, the plug-in box is provided with a plug-in groove for accommodating the plug-in module, a protruding part which is plugged with the groove is arranged in the plug-in groove, the protruding part is provided with at least two through holes, and a second conductive part which is electrically connected with the first conductive part in a one-to-one correspondence mode is arranged in any one of the through holes. The arrangement mode can ensure the connection firmness of the plug-in module and the plug-in monitor, is not easy to damage particularly under the repeated plugging or vehicle-mounted operation condition, and can ensure the stability and reliability of circuit connection.

Description

Plug-in module and plug-in type monitor

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a plug-in module. The utility model also relates to a plug-in type monitor matched with the plug-in module.

Background

A monitor is a device or system that monitors a physiological parameter of a patient.

At present, the plug-in monitor can be plugged with various plug-in modules, such as plug-in modules of body temperature, electrocardio, blood oxygen, noninvasive blood pressure, invasive blood pressure, exhale end and the like. The plug-in monitor can be plugged with a corresponding plug-in module to expand the functions of the monitor, so that medical units can monitor items such as ECG, heart rate, respiration, blood pressure, blood oxygen saturation, pulse and body temperature of patients in monitoring. In the prior art, a plug-in monitor and a plug-in module are connected in a contact manner, for example, a probe is used for data transmission or an interface socket is used for connection. However, in the traditional signal connection mode of the probe, because the probe is in point contact, the connection reliability is poor, and under the condition of repeated plugging and unplugging or vehicle-mounted operation, the connection firmness is not high, so that the stability of circuit connection is influenced, and meanwhile, the process production of probe connection is complex and the cost is high; in addition, the interface socket has complex process and inconvenient assembly, and the firmness of the socket is influenced by repeated plugging and unplugging in the using process, so that the stability of circuit connection is influenced, and the measurement parameters are inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a plug-in module which can ensure the stability and reliability of circuit connection under the condition of repeated plugging and unplugging or vehicle-mounted operation. Another object of the present invention is to provide a plug-in monitor including the above plug-in module.

In order to achieve the above object, the present invention provides a plug-in module, which includes a groove for plugging in a protrusion of a plug-in monitor, wherein at least two first conductive parts are disposed in the groove, and the at least two first conductive parts are electrically connected to second conductive parts disposed in the protrusion of the plug-in monitor in a one-to-one correspondence manner.

Alternatively, at least two of the first conductive members may be uniformly arranged in the circumferential direction.

Optionally, the display device further includes a first housing, the groove is disposed on the first housing, a first signal interface board electrically connected to the first conductive part and a first main control board electrically connected to the first signal interface board are disposed in the first housing, and the first main control board is electrically connected to a first display portion.

The utility model also provides a plug-in monitor which is provided with a plug-in box, wherein the plug-in box is used for electrically connecting the plug-in module and realizing the corresponding function of the plug-in module, the plug-in box is provided with a plug-in groove for accommodating the plug-in module, a bulge part which is plugged with the groove is arranged in the plug-in groove, the bulge part is provided with at least two through holes, and a second conductive part which is electrically connected with the first conductive part in a one-to-one corresponding mode is arranged in any one through hole.

Optionally, the protruding portion is cylindrical, and at least two second conductive components are uniformly distributed in the protruding portion along the circumferential direction.

Optionally, the display device further includes a second housing, a second signal interface board, a second main control board, and a second display portion are disposed in the second housing, at least two of the second conductive parts are electrically connected to the second signal interface board, the second signal interface board is electrically connected to the second main control board, and the second display portion is electrically connected to the second main control board.

Optionally, the protruding portion and the second housing are of an integrally formed structure.

Optionally, the second main control board and the second signal interface board are arranged in parallel, and a heat dissipation channel is arranged between the second main control board and the second signal interface board.

Optionally, the display device further comprises a trigger switch electrically connected with the second main control board, and when the protruding portion is inserted into the groove in place, the corresponding structure of the plug-in module triggers the trigger switch so that the second main control board sends a prompt instruction to the second display portion.

Optionally, the protruding portion is provided with a limiting groove for accommodating the limiting block in the groove.

Compared with the background art, the plug-in module provided by the embodiment of the utility model comprises a groove, wherein the groove is used for plugging the protruding part of the plug-in monitor, at least two first conductive parts are arranged in the groove, and the at least two first conductive parts are used for being electrically connected with the second conductive parts in the protruding part of the plug-in monitor in a one-to-one correspondence manner. During connection, the groove of the plug-in module is butted with the lug boss of the plug-in monitor, and after the plug-in module is connected in place, electric conduction can be realized through the first conductive part and the second conductive part, so that the corresponding functions of the plug-in module are realized, and the functions comprise monitoring of body temperature, heart rate, blood pressure and the like. Compared with the plug-in connection of the traditional plug-in module, the plug-in module provided by the embodiment of the utility model has the advantages that at least two first conductive parts are arranged in the groove, and the first conductive parts and the second conductive parts can be electrically connected through butt joint of the groove and the bulge, so that the plug-in module can be electrically conducted with the plug-in monitor. In addition, the arrangement mode is simple in production process flow of the plug-in module, and production cost is reduced.

Meanwhile, the embodiment of the utility model also provides a plug-in type monitor which is provided with a plug-in box, wherein the plug-in box is used for electrically connecting the plug-in module and realizing the corresponding function of the plug-in module. The plug-in box is provided with a plug-in groove for accommodating the plug-in module, a protruding part is arranged in the plug-in groove, during connection, the groove of the plug-in module is plugged with the protruding part in the plug-in groove, the protruding part is provided with at least two through holes, a second conductive part is arranged in any through hole, and the second conductive part is electrically connected with the first conductive part in a one-to-one correspondence mode. That is to say, through the grafting of bellying and recess to realize the electric connection of second electrically conductive part and first electrically conductive part, thereby realize monitor and plug-in components's electric connection. Compared with the plug-in connection of the traditional monitor, the plug-in monitor provided by the embodiment of the utility model is provided with the plug-in groove and the bulge, wherein the bulge is arranged in the plug-in groove, the plug-in groove can realize the limiting effect on the plug-in module and the protection effect on the bulge, so that the groove of the plug-in module can be directly aligned with the bulge and can be plugged, furthermore, the connection firmness of the plug-in module and the monitor can be ensured through the interference plug-in fit of the bulge and the groove, the plug-in module is not easy to damage particularly under the condition of repeated plug-in or vehicle-mounted operation, and the stability and the reliability of circuit connection can be ensured. In addition, the arrangement mode is convenient and quick to insert, the production process flow of the plug-in type monitor is simple, and the production cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a plug-in module according to an embodiment of the present invention;

FIG. 2 is a block diagram of the structural connections of the plug-in modules;

FIG. 3 is a schematic structural diagram of a plug-in monitor according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the boss shown in FIG. 3;

FIG. 5 is a block diagram of the connection of a plug-in monitor to a plug-in module.

Wherein:

1-a plug-in module, 11-a groove, 12-a first conductive component, 13-a first shell, 14-a first signal interface board, 15-a first main control board and 16-a first display part;

2-plug-in monitor, 21-plug-in groove, 22-lug boss, 221-limit groove, 23-second conductive component, 24-second shell, 25-second signal interface board, 26-second main control board, 27-second display part and 28-power management module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of a plug-in module according to an embodiment of the present invention; FIG. 2 is a block diagram of the structural connections of the plug-in modules; FIG. 3 is a schematic structural diagram of a plug-in monitor according to an embodiment of the present invention; FIG. 4 is a schematic structural view of the boss shown in FIG. 3; FIG. 5 is a block diagram of the connection of a plug-in monitor to a plug-in module.

The plug-in module 1 and the plug-in monitor 2 provided by the embodiment of the utility model can be used in a matching way, the plug-in monitor 2 is provided with a plug-in box, the plug-in module 1 can be plugged in to expand the functions of the monitor, and the plug-in module 1 and the plug-in monitor 2 are suitable for medical units to monitor the items of ECG, heart rate, respiration, blood pressure, oxyhemoglobin saturation, pulse, body temperature and the like of a patient in monitoring.

The plug-in module 1 and the plug-in monitor 2 provided by the embodiment of the utility model can solve the problems of unreliable connection, complex assembly process, inconvenient plug-in connection and the like between the plug-in monitor 2 and the plug-in module 1.

Specifically, the plug-in module 1 according to the embodiment of the present invention includes a groove 11, the groove 11 is used for the protrusion 22 of the plug-in monitor 2 to be plugged in, at least two first conductive components 12 are disposed in the groove 11, and the at least two first conductive components 12 are used for being electrically connected with the second conductive components 23 in the protrusion 22 of the plug-in monitor 2 in a one-to-one correspondence manner. During connection, the groove 11 of the plug-in module 1 is butted with the projection 22 of the plug-in monitor 2, and after the plug-in module is connected in place, the first conductive part 12 and the second conductive part 23 are electrically conducted, so that the corresponding functions of the plug-in module 1 are realized, wherein the functions comprise monitoring of body temperature, heart rate, blood pressure and the like.

It should be noted that the axial length of the first conductive component 12 should be smaller than the depth of the groove 11, so that the first conductive component 12 is hidden inside the groove 11, and the first conductive component 12 can be effectively protected.

Compared with the plug-in connection of the traditional plug-in module 1, the plug-in module 1 provided by the embodiment of the utility model has the advantages that at least two first conductive parts 12 are arranged in the groove 11, the first conductive parts 12 and the second conductive parts 23 can be electrically connected through butt joint of the groove 11 and the bulge 22, so that the plug-in module 1 can be electrically conducted with a monitor, on one hand, the groove 11 can play a role in protecting the first conductive parts 12, on the other hand, the groove 11 can play a role in limiting in matching of the groove 11 and the bulge 22, and meanwhile, the groove 11 and the bulge 22 are in interference insertion matching, so that the connection firmness of the plug-in module 1 and the monitor can be ensured, particularly, the plug-in module is difficult to damage under the conditions of repeated plug-in or vehicle-mounted operation, and the stability and reliability of circuit connection can be ensured.

In addition, the arrangement mode has the advantages that the production process flow of the plug-in module 1 is simple, and the production cost is reduced.

Further, at least two first conductive members 12 are uniformly arranged in the circumferential direction, that is, the pitch of any adjacent two first conductive members 12 is the same.

Of course, the number of the first conductive members 12 in the present embodiment is generally set to 2 to 5 according to actual needs.

When the plug-in module 1 is specifically a plug-in module 1 for monitoring the body temperature of a patient, the number of the first conductive parts 12 is two, and the two first conductive parts 12 are oppositely arranged in the groove 11; correspondingly, the number of the second conductive parts 23 arranged in the protruding part 22 of the plug-in monitor 2 is also two, and the two second conductive parts 23 are electrically connected with the two first conductive parts 12 respectively, wherein the two first conductive parts 12 are used as two electrical signal connection ends (one positive end and one negative end) of the thermistor in the plug-in module 1, the thermistor is electrically connected with the two second conductive parts 23 through the two first conductive parts 12 respectively, so that the electrical connection with the plug-in monitor 2 is realized, and the two first conductive parts 12 are used for transmitting power signals.

When the plug-in module 1 is specifically a plug-in module 1 for monitoring other parameters of a patient, such as heart rate, blood pressure, etc., the number of the above-mentioned first conductive parts 12 is five, and the five first conductive parts 12 are uniformly arranged in the groove 11 along the circumferential direction; correspondingly, the number of the second conductive parts 23 arranged in the protruding part 22 of the plug-in monitor 2 is also five, and five second conductive parts 23 are respectively electrically connected with five first conductive parts 12, wherein two first conductive parts 12 are used as the electrical signal connection end (one positive end and one negative end) of the plug-in module 1, the other two first conductive parts 12 are used as the serial connection end (one is used for sending physiological parameter signals, and the other is used for receiving physiological parameter signals), and the rest one first conductive part 12 is used as the shielding end and is connected with the shielding layer of the plug-in module 1. The plug-in module 1 is electrically connected with the plug-in monitor 2 through five first conductive parts 12 which are respectively electrically connected with five second conductive parts 23 in the plug-in monitor 2.

In addition, the plug-in module 1 further includes a first housing 13, a first signal interface board 14 and a first main control board 15, where the first housing 13 is integrally formed by injection molding, the groove 11 is integrally formed on the first housing 13, the first signal interface board 14 and the first main control board 15 are disposed in the first housing 13, one end of all the first conductive components 12 is connected to the first signal interface board 14, a main body portion of the first conductive components 12 is located in the groove 11, the first main control board 15 is electrically connected to the first signal interface board 14, and the first main control board 15 performs a corresponding function after receiving signals transmitted by the first signal interface board 14.

For convenience of display, the first main control board 15 is connected with a first display part 16, the first display part 16 is arranged on the first shell, the first display part 16 receives an instruction of the first main control board 15 and then displays corresponding parameters, for example, when the plug-in module 1 works, the first display part 16 can display physiological parameters of a patient, such as body temperature, heart rate and the like.

It should be noted that the first signal interface board 14, the groove 11 and all the first conductive parts 12 of the plug-in module 1 form a terminal of the plug-in module 1, the terminal serves as a female head of a conventional connection terminal of the plug-in module 1, and after the plug-in module 1 is plugged into the plug-in monitor 2, the second conductive parts 23 of the terminals of the plug-in monitor 2 and the first conductive parts 12 of the terminals of the plug-in module 1 form an electrical connection for transmitting signals, which may be power signals or physiological parameter signals.

In order to facilitate heat dissipation, the first main control board 15 is disposed in parallel with the first signal interface board 14, and a heat dissipation channel is disposed between the first main control board 15 and the first signal interface board 14.

Meanwhile, the embodiment of the utility model also provides a plug-in type monitor 2 which is provided with a plug-in box, wherein the plug-in box is used for electrically connecting the plug-in module 1 and realizing the corresponding function of the plug-in module 1. The plug-in box is provided with a plug-in groove 21 for accommodating the plug-in module 1, a bulge 22 is arranged in the plug-in groove 21, during connection, the groove 11 of the plug-in module 1 is plugged with the bulge 22 in the plug-in groove 21, the bulge 22 is provided with at least two through holes, a second conductive part 23 is arranged in any through hole, the second conductive parts 23 are electrically connected with the first conductive parts 12 in a one-to-one correspondence mode, namely, one second conductive part 23 is positioned in one through hole, and one through hole forms a monitor connecting pin.

That is, the protrusion 22 is inserted into the groove 11 to electrically connect the second conductive part 23 and the first conductive part 12, so as to electrically connect the monitor and the plug-in module 1.

Compared with the plug-in connection of the traditional monitor, the plug-in monitor 2 provided by the embodiment of the utility model is provided with the plug-in groove 21 and the bulge 22, wherein the bulge 22 is arranged in the plug-in groove 21, the plug-in groove 21 can realize the limiting effect on the plug-in module 1 and the protection effect on the bulge 22, so that the groove 11 of the plug-in module 1 can be directly aligned with the bulge 22 to complete the plug-in, further, the firmness of the connection of the plug-in module 1 and the monitor can be ensured through the interference plug-in fit of the bulge 22 and the groove 11, the plug-in module is particularly difficult to damage under the condition of repeated plug-in or vehicle-mounted operation, and the stability and reliability of circuit connection can be ensured. In addition, the arrangement mode is convenient and quick to insert, the production process flow of the plug-in type monitor 2 is simple, and the production cost is reduced.

Furthermore, the boss 22 is cylindrical, and the circular outer edge adopts an arc design capable of sliding in, so that the force for plugging and unplugging can be reduced, and the service life of the product can be prolonged. At least two through holes/second conductive members 23 are uniformly provided in the protruding portion 22 in the circumferential direction, that is, the pitches of any adjacent two second conductive members 23 are the same.

Of course, the number of the second conductive members 23 in the present embodiment is generally set to 2 to 5 according to actual needs. The number of second conductive members 23 is the same as the number of first conductive members 12 in the plug-in module 1. The arrangement of the number of first conductive parts 12 in the plug-in module 1 can be referred to above and will not be expanded one by one here.

In addition, the plug-in monitor 2 further includes a second housing 24, a second signal interface board 25, a second main control board 26, and a second display portion 27 are disposed in the second housing 24, one end of at least two second conductive components 23 is connected to the second signal interface board 25, a main body of the second conductive component 23 is located in the protrusion 22, the second signal interface board 25 is electrically connected to the second main control board 26, the second display portion 27 is electrically connected to the second main control board 26, and the second main control board 26 performs a corresponding function after receiving a signal transmitted by the second signal interface board 25. It should be noted that the second signal interface board 25, the protrusion 22 and the entire second conductive member 23 form a monitor terminal, and the monitor terminal forms a male terminal (male and female plug) of a conventional connection terminal.

The second display portion 27 may be a display screen with a prompt function, and the display screen may give a prompt, such as displaying a word such as "plug-in module detected" after the plug-in module 1 is plugged into the monitor.

Specifically, the card connector module further comprises a trigger switch electrically connected to the second main control board 26, and when the protruding portion 22 and the groove 11 are inserted in place, a corresponding structure of the card connector module 1 (for example, a trigger portion disposed on the card connector module 1) triggers the trigger switch, so that the second main control board 26 sends a prompt instruction to the second display portion 27. The trigger switch can be arranged on the monitor at the same side of the second main control board 26, and when the protrusion 22 is inserted into the groove 11, the corresponding structure of the plug-in module 1 triggers the trigger switch.

The trigger switch may be an opto-electronic switch. When the protruding portion 22 and the groove 11 are inserted in place, the photoelectric switch outputs a high level, and when the protruding portion 22 and the groove 11 are not inserted in place, the photoelectric switch outputs a low level.

Further, the protruding portion 22 and the second housing 24 are integrally formed, and a part of the second housing 24 forms the protruding portion 22 in the plug box.

In addition, a power management module 28 is further disposed in the plug-in monitor 2, the power management module 28 is connected to the second main control board 26, and the power management module 28 can manage an external power source, thereby implementing power input/output control. Correspondingly, a power supply connecting terminal is arranged in the plug-in box, a power supply connecting part is arranged on the plug-in module 1, after the plug-in module 1 is plugged in place with the plug-in box, the power supply connecting terminal of the plug-in box is electrically connected with the power supply connecting part of the plug-in module 1, the plug-in module 1 can obtain electric power through the power supply connecting terminal to work, and thus the power can be supplied to the plug-in module 1 while being supplied to the monitor by connecting an external power supply.

In order to facilitate heat dissipation, the second main control board 26 is disposed in parallel with the second signal interface board 25, and a heat dissipation channel is disposed between the second main control board 26 and the second signal interface board 25.

In order to further improve the stability and the firmness of the insertion of the protruding portion 22 and the groove 11, the protruding portion 22 is provided with a limiting groove 221 for accommodating a limiting block in the groove 11, that is, the protruding portion 22 is provided with the limiting groove 221, the limiting block is arranged in the groove 11, and after the protruding portion 22 and the groove 11 are inserted, the limiting block is located in the limiting groove 221, so that the groove 11 of the plug-in module 1 and the protruding portion 22 in the insertion groove 21 can be prevented from rotating relatively, and the stability and the firmness of the connection can be further improved.

Meanwhile, besides the limiting function, the arrangement of the limiting groove 221 and the limiting block can also take into account the function of plug-in guiding, so that the plug-in module 1 can be smoothly plugged. When the plug-in module 1 is inserted into the monitor, the protrusions 22 are contacted first, and then the conductive parts are contacted.

It should be noted that the axial length of the second conductive member 23 should be smaller than the axial length of the boss 22, so that the second conductive member 23 is hidden in the through hole on the boss 22, which is beneficial for protecting the second conductive member 23.

In addition, the surface of the convex part 22 can be covered with conductive material and grounded, and the arrangement can solve the problem of poor grounding effect due to large contact area.

Because there is the difference in the electrically conductive part length of different electric functions, in order to improve the interference killing feature of equipment, specific electric function is: when the plug-in type is used, the contact is firstly carried out, then the contact is carried out, and the signal transmission line is carried out.

The plug-in module 1 and the plug-in monitor 2 provided by the embodiment of the utility model are plugged in an interference fit manner, the process is simple, the cost is low, the production and the assembly are easy, the plug-in module 1 and the plug-in monitor 2 are firmly connected and are not easy to fall off, and the problem of poor contact can not be caused even in a bumpy operating environment; in addition, the arrangement of the insertion groove 21 and the limiting groove 221 can ensure that the insertion is in place at one time, the insertion error is avoided, the operation is simple and convenient, and the service life is long.

The plug-in module and the plug-in monitor provided by the utility model are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are provided only to help understand the concepts of the present invention and the core concepts thereof. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A plug-in module (1) is characterized by comprising a groove (11) for plugging a boss (22) of a plug-in monitor (2), wherein at least two first conductive parts (12) are arranged in the groove (11), and the at least two first conductive parts (12) are electrically connected with second conductive parts (23) in the boss (22) of the plug-in monitor (2) in a one-to-one correspondence mode.

2. Insert module (1) according to claim 1, wherein at least two of the first conductive parts (12) are arranged evenly in circumferential direction.

3. The card module (1) of claim 1, further comprising a first housing (13), wherein the groove (11) is disposed on the first housing (13), a first signal interface board (14) electrically connected to the first conductive part (12) and a first main control board (15) electrically connected to the first signal interface board (14) are disposed in the first housing (13), and the first main control board (15) is electrically connected to a first display part (16).

4. A plug-in monitor (2), characterized in that a plug-in box is provided for electrically connecting a plug-in module (1) according to any one of claims 1 to 3 and for realizing a corresponding function of the plug-in module (1), the plug-in box is provided with a plug-in slot (21) for accommodating the plug-in module (1), a protrusion (22) for plugging in the groove (11) is provided in the plug-in slot (21), the protrusion (22) is provided with at least two through holes, and a second conductive part (23) for electrically connecting the first conductive parts (12) in a one-to-one correspondence is provided in any one of the through holes.

5. The on-card monitor (2) according to claim 4, wherein the protrusion (22) is cylindrical and the at least two second conductive members (23) are evenly distributed in the protrusion (22) along the circumferential direction.

6. The plug-in monitor (2) according to claim 4, further comprising a second housing (24), wherein a second signal interface board (25), a second main control board (26) and a second display portion (27) are disposed in the second housing (24), at least two of the second conductive components (23) are electrically connected to the second signal interface board (25), the second signal interface board (25) is electrically connected to the second main control board (26), and the second display portion (27) is electrically connected to the second main control board (26).

7. The on-card monitor (2) according to claim 6, wherein the protrusion (22) and the second housing (24) are of an integral structure.

8. The plug-in monitor (2) according to claim 6, wherein the second main control board (26) is arranged in parallel with the second signal interface board (25), and a heat dissipation channel is arranged between the second main control board (26) and the second signal interface board (25).

9. The plug-in monitor (2) according to claim 6, further comprising a trigger switch electrically connected to the second main control board (26), wherein when the protrusion (22) and the groove (11) are plugged in, the corresponding structure of the plug-in module (1) triggers the trigger switch, so that the second main control board (26) sends a prompt instruction to the second display portion (27).

10. Plug-in monitor (2) according to any of claims 4 to 9, characterised in that the protrusion (22) is provided with a stop groove (221) for receiving a stop in the recess (11).

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