CZ61794A3 - Fire-alarm box - Google Patents

Abstract

In a fire detector which consists of a detector insert (2) and a holder (1), in which the detector insert (2) in the inserted state completely covers the holder (1), the detector insert (2) has a movable closure device, preferably consisting of a ring (3), by means of which the detector insert (2) can be mechanically locked relative to the holder (1). Marking elements (5, 6) are provided on the detector insert (2), which elements permit the correct end position of the detector insert (2) relative to the holder (1) to be monitored. <IMAGE>

Description

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FIELD OF THE INVENTION The present invention relates to a fire detector comprising a signaling insert and a base into which a signaling insert is inserted and in which the signaling insert completely covers the base in the inserted state.

BACKGROUND OF THE INVENTION

Fire detectors of this kind are well known. It serves to protect human lives and property in fire reporting facilities for the early detection of fires. Such fire reporting devices generally consist of a control panel and fire detectors located in protected buildings.

The fire detectors are equipped with fire detection sensors, electronic amplifiers and devices for transmitting information to the control panel. Structurally, the fire detector usually consists of a fire detector (signaling insert), which comprises sensors and electronic equipment, which is provided with a socket and which is firmly installed in the monitored area, and into which the signaling insert is inserted. In this way, the signaling inserts for inspection can be removed and reinserted.

In view of the high demands placed on the reliability of fire detection equipment, the weaknesses of such equipment must be eliminated wherever possible. One such weak point is undoubtedly the signaling / socket connection, since the functional capability of the entire device to fire reporting is highly dependent on it. Therefore, it is understandable that manufacturers are trying to ensure the reliability of the signal insert / socket connection with these design devices with good design solutions.

The following requirements are imposed on the signal insert / socket connection:

- electrical contact reliability

- protection of contacts against dirt and corrosion

- secure mechanical attachment

- good external appearance (design).

The latter requirement is particularly important because fire alarms are often installed in places where the aesthetics of their design play a large role. These include theaters, museums and historic buildings.

In order to combine a suitable design with good protection against contamination of contacts, it has been proposed, inter alia, in German Utility Model DE-U1-92 10 858 to provide a signal insert so that it completely covers the socket in the inserted state. This also has the advantage that the color changes of the base caused by aging do not adversely affect the appearance of the fire detector when, for example, after some time the signaling insert needs to be replaced.

However, the disadvantage of such a design is that for all fire detectors in which the signaling insert completely covers the base, it is difficult to tell if the signaling insert is well seated in the base. However, this is a prerequisite for all fire detectors, which consist of a base and signaling element. Incorrectly inserted signaling elements are a priori sources of faults and often give rise to complaints.

This problem has not been clearly addressed in the past. Checking the correct position of the signal insert after insertion by trained personnel was only necessary later. The increased costs associated with this need to be taken into account in the functional capability of the entire system, although this will increase installation costs.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the deficiencies of known fire detectors and to provide a fire detector of the above type which is provided with a shut-off device provided on the signaling pad. This will greatly facilitate the control of the fire detector and the costs associated with it will be minimized.

SUMMARY OF THE INVENTION

This object is achieved by a fire detector consisting of a signaling insert and a base into which the signaling insert is inserted and in which the signaling insert completely covers the base according to the invention, which is characterized in that the signaling insert is provided with a movable shut-off device. the insert is mechanically locked to the base and is provided with a first marking element which is in an unequivocal position in the end position of the signaling insert relative to the second marking element provided on the lower portion of the signaling insert, thereby making the correct end position of the signaling insert relative to the base recognizable from the outside.

Advantageous embodiments are set forth in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a side view of the fire detector according to the invention with the shut-off device in the open state; FIG. 2 is a cross-sectional view along the line AA of the fire detector of FIG. FIG. 4 shows a cross-section along line BB of the fire detector of FIG.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows a fire detector with a base 1 and a signaling insert 2, which consists of a movable ring 3 and a lower part 4. The ring 3 is freely movable within a certain angular range with respect to the lower part 4 of the signaling insert 2. Signaling insert 2 is firmly connected to the base 1 by a closing device. On the outside of the ring 3 there is provided a first marking element 5 and on the outside of the lower part 4 of the signaling insert 2, a second marking element 6 is provided such that in the open, non-closed state of the fire detector. the marking element 6.

The closure device consists of three guide lugs 7 and one locking lug 8, which are provided on the inside of the ring 2. The base 1 is further provided with three guide slides 9 intended to engage the guide lugs 7, and one holding lug 10 intended for engagement with the locking projection 8. In order to be able to firmly attach the signaling insert 2 to the socket 1 by means of the closing device, the signaling insert 2 is first inserted into the insertion position in the socket 3 shown in FIG. The locking device is actuated by rotating the ring 3 by a certain angle and the guide lugs 7 are moved in the guide slides 9. Complete locking is achieved by moving the locking lug 8 beyond the holding lug position. 3 and 4, the marking element 5 in line with the other marker element

6. The complete and correct fastening is therefore clearly visible even by a distance of several meters by means of these marking elements 5 and 6.

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Various variations of the described fire detector construction are possible and common to the skilled person within the scope of the invention as claimed.

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Claims (8)

PATENTS i Ν Á “RHO K Υ = A fire detector comprising a signaling insert (2) and a base (1) in which a signaling insert (2) is inserted and in which the signaling insert (2) completely covers the base (1), characterized in that: the signaling insert (2) is provided with a movable closing device (3) by which the signaling insert (2) is mechanically locked to the base (1) and which is provided with a first marking element (5) which is in the end position of the signaling insert (2) with respect to the second marking element (6) provided on the lower part (4) of the signaling insert (2), it is brought into an unambiguous position, whereby the correct end position of the signaling insert (2) relative to the base (1) is discernible from the outside. A fire detector according to claim 1, characterized in that the closing device consists of a ring (3) which is located at the upper end of the signaling insert (2). Fire detector according to one of claims 1 or 2, characterized in that the marking elements (5, 6) are formed by shaped elements which are arranged side by side or one above the other in order to detect the end position of the signaling insert (2). AND Fire detector according to claim 3, characterized in that the marking elements (5, 6) are formed by protruding ribs. Fire alarm according to one of Claims 1 to 4, characterized in that the marking elements (5, 6) differ in color from the signaling insert (2). Fire detector according to one of Claims 1 to 5, characterized in that the closing device (3) is provided with means which are arranged and designed to operate an electrical contact which gives a signal when the end position of the signaling insert (2) is reached. . A fire detector according to claim 6, characterized in that it is provided with additional means such that the signal is transmitted to the control panel. Fire detector according to one of Claims 5 to 7, characterized in that it is provided with additional means such that an optical signal is produced by the electrical contact on the signaling insert (2). pven-94