JP2000244992A - Ceiling face mounting type loudspeaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sharply simplify cover mounting at a high place by providing a loudspeaker unit on the inner face of a cover which is faced to a pedestal, and providing a terminal for connecting a lead wire for an input signal and a lead wire for signal distribution, the introducing hole of the lead wire, and a transforming means for transforming a signal to be outputted to the loudspeaker unit at the pedestal. SOLUTION: In a ceiling face mounting type loudspeaker device, a case body part is formed of a pedestal 2 and a cover 3, and mounted on a ceiling so that they can be integrated in a state that covers are vertically matched. The pedestal 2 is formed like a circle by molding, and preliminarily mounted on a ceiling face, and a wiring hole for introducing a signal wire to be introduced from the back side of the ceiling is formed at the central part of the pedestal 2, and a terminal and a transformer 6 are formed at the pedestal 2 side. The cover 3 is formed like a cup by molding or the like, and the plate thickness is set so that strength for holding a loudspeaker unit sp1 can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted speaker and, more particularly, to a ceiling-mounted speaker having a structure suitable for connecting a plurality of speakers to each other on a ceiling or a wall. is there.

[0002]

2. Description of the Related Art In general, hall broadcasting devices are installed in partitioned spaces having a predetermined size, such as halls, event venues, and supermarkets, to provide ordinary broadcasting such as BGM and various general announcements, and also, in the event of a disaster. Emergency broadcasts are broadcasted from a plurality of speakers mounted on the ceiling. A speaker used in this type of device is generally called a so-called ceiling-mounted speaker that can be mounted on a ceiling, and as a mounting form, for example, Japanese Utility Model Publication No. 63-45109 and As disclosed in Japanese Utility Model Application Laid-Open No. Sho 62-89891, there is a method of directly fixing a speaker unit, which is a sound output means including a diaphragm and an actuator, to a ceiling. This is a mounting method in which holes are formed in the ceiling plate that roughly correspond to the above, and a speaker unit and the like are arranged on the upper surface (behind the ceiling) of the ceiling plate.

As another mounting method, there is a mounting method in which a speaker device main body including a speaker unit is directly mounted on a lower surface (a surface of a ceiling) of a ceiling plate without making a large hole in the ceiling. A general structure of such a speaker device is a divided structure of a base formed of a sheet metal fixed to a lower surface of a ceiling plate and a plastic cover.

By the way, there are various problems in the above-mentioned various types of prior art ceiling-mounted speaker devices. For example, in the case of a ceiling-embedded speaker in which the above-mentioned speaker unit and the like are fixed to the ceiling, it is necessary to form a large hole having a shape corresponding to the speaker unit on the ceiling. If another speaker is to be mounted in the above method, a speaker device having a shape corresponding to the same hole must be prepared, which causes a problem that compatibility with the speaker device is poor.

In the above-described example in which the speaker device main body is directly mounted on the ceiling surface without making a large hole in the ceiling, the speaker device is mounted on the ceiling by screwing a base to the ceiling surface in advance. After that, the operator places the cover, in which various parts such as the speaker unit as the audio output means and the terminal to which the signal line is connected, are arranged inside, and the worker lifts the cover from below and is fixed to the ceiling. In many cases, the base and the cover are fixed by utilizing the repulsive force of a connecting means such as a torsion spring for connecting the base and the cover in the vertical direction. The mounting structure using torsion springs is to fix one end of the torsion spring in the shape of the letter "ku" to the upper end face of the cover, with the convex part of the letter "ku" facing the outside of the device. deep. When the cover is pressed against the base from below, there is a space where the protruding part rebounds outward after climbing over the lower end face of the base, and eventually the protruding part presses the inner wall of the base outward. As a result, the cover is fixed to the base without falling. As a fixing method simply uses a spring action, it is not always possible to stably fix a heavy member or a member that rebounds in a separating direction.

[0005] In addition, since this type of loudspeaker device requires a work on a stepladder or the like for mounting and repair at high altitudes, the former method of mounting by the elastic return force of the torsion spring has too strong a spring force. At the time of mounting work, a repulsive force acts on an operator riding on a stepladder or the like, which is extremely dangerous. In this type of fixing, if the spring force is too weak, the mounting force is weakened and the cover is easily detached. Further, in these speaker devices, it is common that all parts such as a speaker unit, a transformer, and terminal terminals are fixed in advance on the cover side, and thus there is a disadvantage that the cover becomes heavy. At the same time, an attempt is made to split and output the signal from the first speaker device, to which the audio signal has been input from the external amplifier, to another speaker device, and to connect the other terminal to the terminal terminal provided on the cover of the first speaker device. When connecting signal lines according to the number of speaker devices that branch into the base, it is necessary to connect the signal lines to the terminal terminals of the cover at a high place before attaching the cover to the base. Ineffective with danger.

[0006] Furthermore, signal lines connected to terminals (one-touch terminals, terminals connected by pushing in) are common signal lines for broadcasting, emergency broadcasting, and a common ground line.
A single wire (φ0.8 to φ1.
6 mm) is generally used. For this reason, if signals are connected in parallel from the first speaker device to, for example, the other two speaker devices, the external amplifier is connected to the terminal terminal of the first speaker device to transmit the signal to the ceiling. A total of nine signal lines, that is, the three lead wires for input signals connected via the loudspeaker and the output signal lines (six) of the two speakers for branch output are connected. . If the cover to which these signal lines are connected is mounted on the base and fixed, when the cover is closed, the total elastic return force of the nine signal lines acts on the cover to reduce the force to close the cover. Not only is it repulsive, making it extremely difficult to attach the cover, but it is also necessary to increase the strength of the cover in order to prevent deformation due to the repulsive force. This is a factor in increasing costs, such as careful selection.

Further, in the above-mentioned conventional mechanism in which the cover and the base are connected by a torsion spring, all the lead wires are attached to the cover side. , It rebounds and opens due to the total elastic repulsion, and it becomes difficult to attach the cover. Moreover, since the above-mentioned many lead wires are connected to the cover, when the cover is closed, the lead wires cannot be collected (arranged) and stored inside the cover. There is a problem in work such as protruding outside of the apparatus from a gap with the table, or in which the leads are entangled with each other or with other components, making it difficult to close the cover. In addition, unleaded leads may be pinched between the cover and other components, causing an accident such as breakage of the lead film, or having heat such as a transformer or electrical resistance. There is a problem that performance and safety issues arise due to assembling while the lead wires are arranged close to the parts to be formed.

[0008]

In order to solve the above-mentioned problems, the present invention provides a base (2) mounted on a ceiling surface.
And a cover (3) detachably attached to the base (2), the speaker (1) mounted on a ceiling surface, and a speaker is provided on an inner surface of the cover (3) facing the base (2). A terminal (4) for connecting a lead wire for an input signal and a lead wire for distributing a signal to another ceiling-mounted speaker, comprising: a unit (sp1); And a transformer (6) for transforming a signal to be output to the speaker unit (sp1). In order to further solve the above-mentioned problem, according to the present invention, the lead wires connected to the terminal terminal (4) are three single wires consisting of a normal input, an emergency input, and a common ground wire. A ceiling-mounted speaker (1) as described.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing an embodiment of a ceiling-mounted speaker (1) of the present invention,
FIG. 2 is a development view of the base and the cover. FIG. 3 is an external view of the base (2), and FIG. 4 is an external view of the cover (3).
FIG. 5 is an external view of a state where a lead wire is connected to the base (2). Ceiling-mounted speaker of this embodiment (1)
According to (hereinafter also referred to as a speaker device), basic components for operation are the same as those of the above-described conventional device. That is, in FIG. 1, the speaker device (1) has a housing portion formed of a base (2) and a cover (3), and is integrally mounted on a ceiling in such a manner that a lid is fitted up and down and mounted on a ceiling. The base (2) is formed in a circular shape by molding or the like, and is attached to the ceiling surface in advance. At the center of the base (2), a wiring hole (2A) for introducing a signal line led from behind the ceiling (ceiling surface) is formed at the center. The cover (3) is similarly formed into a bowl shape by molding or the like, and its plate thickness may be a thickness having strength enough to hold the speaker unit (sp1) as described later.

[0010] The base (2) and the cover (3) have a rotation click stop mechanism for fixing at a position opposite to each other, and the cover (3) is fixed to the base (2) previously fixed to the ceiling surface from below. ), The cover (3) is rotated by a predetermined amount, and is fixed by the rotation click stopping mechanism. Next, the configuration of the speaker device (1) will be described with reference to the external view of the base (2) shown in FIG. 3 and the external view of the cover (3) shown in FIG. In the external view of the base (2) shown in FIG. 3, terminals (one-touch terminals) (4) for connecting lead wires for inputting and outputting signals are denoted by N and N described later.
R and COM are divided into three types of areas. In each area, a plurality (for example, three) of terminal terminals into which the ends of the lead wires are inserted and fixed are arranged, and the terminal terminals in one area are provided. Are conductive with each other.

Each of the amplifiers (not shown) outside the speaker device (1) has a diameter of 0.8 to
Three 1.6 mm single lead wires for input signals are wired to the speaker device (1). The three lead wires pass through the wiring hole (2A) in the center of the base (2), and the three types of regions N, R, CO in the terminal (4).
M are wired one by one. The lead to the area N is a signal line for normal broadcasting, the lead to the area R is a line used for emergency broadcasting, and the lead to the area COM is a common ground line (common ground). is there. Normally, the R and COM lines are short-circuited on the amplifier side. When broadcasting an emergency such as when a disaster occurs, use R, COM
The signal is transmitted to the R line with the interval cut by the amplifier. FIG. 5 shows a situation where three input signal leads are connected to the terminal (4).

The signal input to the terminal (4) is transmitted to an attenuator (5), a transformer (6) and a lead wire (L).
1) A first component fixed to a cover (3) side, which is another component of the speaker device (1), via (L2).
Of the speaker unit (Sp1). The attenuator (5) has a function of attenuating a signal input from an external amplifier and appropriately adjusting the volume output from the speaker device (1). For this purpose, an attenuator switch (5A) attached thereto is used to reduce the amount of attenuation. You can switch and select the optimal volume. The transformer (6) has a function of converting the voltage of the attenuated signal output from the attenuator (5) to make the voltage optimal for the input of the speaker unit (sp1). The speaker unit (sp1) includes a diaphragm and an actuator that vibrates the diaphragm in accordance with an input signal, has a function of converting an input signal into an audio output, and outputs a normal broadcast or an emergency broadcast input from the outside. The sound is output to the outside according to the signal. The speaker unit (sp1) has a cover (3).
When the speaker needs to be replaced, the entire cover (3) may be replaced, and the speaker unit (sp1) may be replaced or removed from the speaker device (1). Work can be done quickly and easily. When maintenance work such as adjustment of components such as the attenuator (5) disposed on the base (2) and connection of lead wires is required, the cover (3) can be removed.
The speaker unit (sp) integrated with the cover (3)
1) can be easily removed, and the parts mounting surface inside the base (2) is exposed to the operator, so that maintenance work can be performed quickly and easily.

In FIG. 4, the cover (3) is provided with a fall prevention wire (8) having one end fixed to the cover (3), and a hook which can be opened and closed is fixed to the other end. (2) is provided with a fall prevention wire mounting ring (7) for fixing the hook. The use of these configurations will be described later. Further, a signal is branched from the speaker device (1) to another not-shown, for example, two speaker devices, and output, and the speaker units (Sp2) (Sp) (not shown) included in the respective speaker devices are output.
It is possible to output the sound from 3). For this purpose, two single-wire leads of φ0.8 to 1.6 mm similar to the input signal lines are connected to each of the N, R, and COM regions of the terminal (4), and a total of six lead wires are provided. Stand (2)
Through the wiring hole (2A) provided at the center of the loudspeaker, the ceiling, and the other speaker devices, N, R, and COM lines are connected one by one. Other speaker devices have the same configuration as the speaker device (1) described above, and the three lead wires are connected to each speaker device as input signal lines by the wiring method described above. So
A speaker unit (sp) included in another speaker device
2) A sound corresponding to the signal output from the amplifier is also output from (sp3).

The lead wires (L1) (L1) having one end fixed to a transformer (6) disposed on the base (2).
The length 2) needs to be about 30 cm in consideration of the ease of work when connecting to the speaker unit (Sp1) on the cover (3) side separated from the base (2).
The work of connecting the lead wires to the speaker unit (sp1) is a work at a high place performed on a stepladder or the like.
p1) side is a connector terminal (one-touch terminal) (s
p1A) and (sp1B) are configured to receive the lead wires (L1) and (L2). As described above, the fall prevention wire (8) is attached to the cover (3), and the hook attached to one end thereof is hooked on the fall prevention wire mounting ring (7) provided on the base (2). The cover (3) can be prevented from being accidentally dropped during work because it is fixed, and the cover (3) is hung from the base (2) using the fall prevention wire (8). It is also possible to perform the connection work. An exploded view of the speaker device (1) shown in FIG. 2 shows the connection work.

On the other hand, the terminal (4) of the base (2), which is mounted on the ceiling in advance, has three input signal lines from the outside and another speaker unit (Sp) as described above.
2) Output signal lead wires (six in the above example) for outputting sound from (Sp3) need to be attached by work at the same height, but the work is fixed to the ceiling by the terminal (4). Since it is provided on the base (2) provided, it can be easily and safely performed. That is, a worker who climbs a high place near the ceiling using a stepladder or the like simply pushes one hand against the ceiling to stabilize the posture and inserts and joins each lead wire to the terminal (4) with the other hand. Connection work can be performed by operation, preventing labor accidents caused by instability of the worker's posture when connecting the lead wire with both hands as in the connection work of the device according to the prior art It is possible to complete the connection work quickly and reliably.

The advantages of the above-described speaker device (1) according to the present embodiment will be described more concretely while referring to a comparison with the device according to the prior art. When the main components such as the speaker unit, the terminal terminals, and the transformer are concentrated on the cover side as in the device according to the related art, the configuration (assemblability) of the system is simple, but the above-described cover is not used. At the time of mounting work to the base, the cover side becomes heavy, which poses a danger to work at a high place, which is a major drawback from the viewpoint of work safety as a ceiling speaker device. In addition, many lead wires for signal input and signal output from the holes in the ceiling are connected to the terminal terminals provided on the cover by hand while holding the cover at a high place. Since both hands are closed only by the work, the posture of the worker lacks stability, which is a dangerous work.

Further, in the device according to the prior art, the length of the input / output signal lead wire connected to the terminal disposed on the cover side is φ0 in consideration of the easiness of the connection work as described above. The six main leads, which are single wires of 0.8 to 1.6 mm, need to be 30 cm in length. For this reason, when closing and attaching the cover, 30 cm
Must be stored so that all of the lead wires are folded inside the cover. Thereby, since the elastic repulsive force of the plurality of lead wires directly presses the inner surface of the cover, the mounting operator must perform the cover mounting operation with a force greater than the elastic repulsive force, which is extremely dangerous work. I will. On the other hand, according to the configuration of the present embodiment, the terminal (4), the transformer (6) and the like are attached to the base (2) which is a fixed body on the ceiling side, so that the cover (3) is lightweight. Therefore, the workability is good in the work of connecting the lead wires (L1) and (L2) to the cover (3) and attaching the cover (3) to the base (2).
The work of connecting the lead wire to another speaker device to the speaker device (1) also has good workability as described above.

Further, the lead wires connected to the terminal (4) can be arranged, bent and stored inside the base (2) before closing the cover (3). The cover (3) can be easily attached to the base (2) without paying special attention to the summary. Further, since it is not necessary to increase the physical strength of the cover (3) in consideration of the elastic repulsive force of the lead wire, it is not necessary to increase the molding thickness of the cover (3), so that the molding material can be saved and the environment can be saved. Consideration is also good.

Similarly, since it is not necessary to consider the elastic repulsive force of the lead wire and the weight is relatively light, the cover (3) can adopt a mounting form using a torsion spring as in the prior art. The rotary click method described in the present embodiment may be used, and the degree of freedom in design is greatly improved, and it is easy to give a change to the design. In addition, since the cover (3) does not include performance components other than the speaker unit (sp1), the cost of the cover (3) as a whole is relatively inexpensive. 3) It is also possible to exchange the whole unit, and the speaker unit (sp1)
The work of adjusting the attenuator (5) involved in the replacement also has good workability because the attenuator (5) is provided on the base (2), and the cost of parts and work during the replacement and adjustment is reduced. Burden can be reduced.

[0020]

As described above, in the ceiling-mounted speaker (1) of the present invention, since the terminal (4) and the transformer (6) are located on the base (2) side, the cover (3) is not provided. Since the lead wires can be stored in an organized and folded state before mounting, the cover (3) does not receive any elastic repulsive force due to the bending of the lead wires, and the cover (3) at a high place.
There is an effect that attachment becomes extremely easy. Also, since the elastic repulsive force acting on the cover (3) is small, the strength of the cover (3) can be reduced, so that the cover (3) can be formed thin or a material having high mechanical strength. This has the effect of reducing the cost of the device, such as eliminating the need to use In addition, there is an effect that the cover (3) is not deformed. Further, since the terminal (4) is provided on the base (2), workability is improved when a signal line used for input / output with the outside is connected to the device.
There is also an effect. Furthermore, since a single wire is used as a signal input / output lead wire connected to the terminal (4), the elastic repulsion is smaller than that of an integrated flat wire having a plurality of separated core wires, and a plurality of wires are used. Compared to a stranded wire in which a single wire is twisted and integrated, the end face of the lead wire to be connected is separated, so that connection work to the terminal (4) is easy, so that the workability described above is improved. This has the effect of further increasing the effect of reducing the weight of the cover.

[Brief description of the drawings]

FIG. 1 is an external view of a ceiling-mounted speaker according to the present invention.

FIG. 2 is a development view of a ceiling-mounted speaker according to the present invention.

FIG. 3 is an external view of a base of the apparatus according to the present invention.

FIG. 4 is an external view of a cover of the device according to the present invention.

FIG. 5 is an external view illustrating a state where a lead wire is connected to a base of the apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Speaker apparatus 2 Base 2A Wiring hole 3 Cover 4 Terminal 5 Attenuator 5A Attenuator change-over switch 6 Transformer 7 Fall prevention wire mounting ring 8 Fall prevention wire L1 Lead wire L2 Lead wire sp1 Speaker unit sp1A Connector terminal sp1B Connector terminal

Claims (2)

[Claims] 1. A ceiling-mounted speaker comprising a base mounted on a ceiling and a cover detachable from the base, wherein a speaker unit is provided on an inner surface of the cover facing the base. The base includes a terminal terminal for connecting a lead wire for an input signal and a lead wire for signal distribution to another ceiling-mounted speaker, a lead-out hole of the lead wire, and an output to the speaker unit. A ceiling-mounted speaker comprising: a transformer for transforming a signal. 2. The speaker according to claim 1, wherein the lead wires connected to the terminal terminals are three single wires consisting of a normal input, an emergency input, and a common ground wire.