An alarm loudspeaker

Abstract

The utility model relates to a kind of alarm loudspeaker, belong to loudspeaker technical field, overcome the problem of prior art size is relatively large, only single use, not suitable for combined use, features are connected with 1 lower shell and 1 lower shell in the vertical board of L-shaped support or simultaneously connected with upper and lower two lower shells and two upper shells, the middle lower end of upper shell is equipped with downward arc convex, lower shell is equipped with the arc-shaped recess of cooperation with the arc convex of upper shell, after the butt joint of cooperation of upper shell and lower shell, the U-shaped sound outlet channel or double U-shaped sound outlet channel of intercommunication is formed, inverted sound head is connected in the upper shell, alarm sound is emitted from the sound hole on the cover of sound head during work, enter U-shaped sound outlet channel through the bottom of the arc convex of upper shell first sound hole, after reflection by the inner wall of lower shell, again spread out through U-shaped sound outlet channel or double U-shaped sound outlet channel, with the advantages of small size, compact structure, full tone, soft, strong directivity, large power, high efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of loudspeaker technology, and specifically relates to an alarm loudspeaker. Background Technology

[0002] A loudspeaker is a transducer that converts electrical signals into sound signals. When an audio signal passes through a voice coil, the voice coil moves in a magnetic field, causing the diaphragm to vibrate, which in turn pushes the surrounding air to produce sound waves.

[0003] The invention with application number CN201510118467.0 discloses "a high-loudness vehicle alarm". The invention consists of an alarm housing and a high-power speaker. The high-power speaker is composed of a W-shaped frame, a ring-shaped magnetic cavity, a ring-shaped strong permanent magnet, a W-shaped diaphragm, a skeleton voice coil and a W-shaped end cap to form a compression sound head. A reflective horn is installed on the compression sound head. The invention is relatively large and is not suitable for some places where there is limited installation space.

[0004] Utility model application CN200820302511.9 discloses an "ultra-thin high-power alarm horn," comprising a shell, a steel cup, a diaphragm, an end cap, a magnet, and a pole core. The shell is flat, with a steel cup cavity inside. The steel cup is placed within the steel cup cavity, and a circular recess is formed within the steel cup. The magnet is placed within the circular recess, and the pole core is stacked above the magnet. A diaphragm is placed above the pole core. The end cap presses tightly against the edge of the diaphragm to fix it to the shell. The shell has two arc-shaped sound channels. The problem with this utility model is that, due to the flat shell shape and the presence of two parallel arc-shaped sound channels on one side of the shell, the utility model is still relatively large. Furthermore, this utility model can only be used alone and is not suitable for combined use. Utility Model Content

[0005] The problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an alarm speaker that is small in size, compact in structure, flexible in installation, and can be used alone or in combination.

[0006] The technical solution adopted by this utility model includes an L-shaped bracket. A first screw hole is provided on the upright plate of the L-shaped bracket, and a lower housing and an upper housing are connected by a first long screw. The lower middle end of the upper housing has a downward-facing arc-shaped protrusion. A first sound outlet is provided at the bottom of the arc-shaped protrusion of the upper housing. Rectangular second sound outlets are provided on the left and right sides of the arc-shaped protrusion of the upper housing. An arc-shaped groove that mates with the arc-shaped protrusion of the upper housing is provided in the middle of the lower housing. A sealing groove is provided along the upper edge of the lower housing, and a corresponding sealing protrusion is provided on the upper housing. The upper and lower housings are connected by a sealing protrusion and a sealing groove to achieve a sealing effect. After the upper and lower housings are connected, they form a U-shaped sound outlet channel. An inverted microphone is connected to the upper housing with a second long screw. The inverted microphone includes a microphone shell and a microphone top cover connected to the microphone shell. The microphone top cover has a sound hole that communicates with the first sound outlet hole at the bottom of the arc-shaped protrusion of the upper housing. A U-shaped iron, a magnet, and a washer are installed in the microphone shell. A throat plug is installed in the microphone top cover, and a voice coil is installed on top of the throat plug.

[0007] Two lower housings and two upper housings are connected to the upright plate of the L-shaped bracket. After the two upper housings and two lower housings are connected, they form two interconnected double U-shaped sound outlet channels that are perpendicular to the two upper housings and two lower housings.

[0008] The first long screw passes through the screw hole of the lower housing and connects to the first blind threaded hole of the upper housing, thereby fixing the lower housing and the upper housing to the L-shaped bracket.

[0009] The horizontal plate of the L-shaped bracket is provided with a second screw hole for connection with the vehicle body during use.

[0010] The second long screw passes through the screw hole of the lower housing and connects to the second blind threaded hole of the upper housing, thereby fixing the inverted tone head to the lower housing and the upper housing.

[0011] The lower housing is also provided with connection holes on its side wall for connecting to external connectors when needed.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) Since the horn is omitted, this utility model has the characteristics of small size and compact structure. It can be connected by an L-shaped bracket to a lower shell and an upper shell or to two lower shells and two upper shells at the same time. Correspondingly, an inverted phono head can be connected in one upper shell to be used as a 50W loudspeaker, or two inverted phono heads can be installed in two upper shells to be used as a 100W loudspeaker, which can meet the needs of loudspeakers with different power.

[0013] (2) After the upper shell and the lower shell are connected, a U-shaped sound outlet channel perpendicular to the upper shell and the lower shell is formed. Alternatively, after the upper shell and the lower shell are connected, two U-shaped sound outlet channels perpendicular to the upper shell and the lower shell are formed. When working, the alarm sound is emitted from the sound hole on the head cover, enters the U-shaped sound outlet channel through the first sound outlet hole at the bottom of the arc-shaped protrusion of the upper shell, is reflected by the inner wall of the lower shell, and then propagates out through the U-shaped sound outlet channel or the double U-shaped sound outlet channel. The sound quality is full and soft, and has the advantages of strong directionality, high power and high efficiency.

[0014] (3) This utility model can be connected to the vehicle body or other external connectors that require the use of this utility model through the second screw hole provided on the horizontal plate of the L-shaped bracket, which is convenient and flexible. Attached Figure Description

[0015] Figure 1 This is the front view of this utility model. Figure 2 yes Figure 1 Left view, Figure 3 yes Figure 1 AA section view; Figure 4 This is a rear view of the present invention. Figure 5 yes Figure 4 BB cross-sectional view.

[0016] In the picture: 1. L-shaped bracket, 1-1. First screw hole, 1-2. Second screw hole, 2. The first long screw, 3. Lower housing, 3-1. Arc-shaped groove, 3-2. Sealing groove, 3-3. Connecting hole, 4. Upper shell, 4-1. Arc-shaped protrusion, 4-2. First sound outlet, 4-3. Sealing protrusion, 4-4. Second sound outlet hole; 4-5. First blind threaded hole; 4-6. Second blind threaded hole. 5. Sound output channel, 6. Engraving, 6-1. Engraving shell, 6-2. Engraving cap, 6-2-1. Sound hole, 6-3. U-shaped iron, 6-4. Magnet, 6-5. Washer 7. Voice coil, 8. Throat obstruction, 9. The second longest screw. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] like Figures 1 to 5 As shown, the technical solution adopted by this utility model includes an L-shaped bracket 1. Eight first screw holes 1-1 are provided on the upright plate of the L-shaped bracket 1, and one lower housing 3 and one upper housing 4 are respectively connected by first long screws 2, or two lower housings 3 and two upper housings 4 are simultaneously connected. Further, the first long screws 2 pass through the screw holes of the lower housing 3 and connect to the first blind threaded holes 4-5 of the upper housing 4, thereby fixing the lower housing 3 and the upper housing 4 to the L-shaped bracket 1. A single-use... The upper housing 4 has a second screw hole 1-2 for connecting to the vehicle body. The lower middle end of the upper housing 4 has a downward-facing arc-shaped protrusion 4-1. A circular first sound outlet 4-2 is located at the bottom of the arc-shaped protrusion 4-1. Rectangular second sound outlets 4-4 are located on the left and right sides of the arc-shaped protrusion 4-1. The lower housing 3 has an arc-shaped groove 3-1 in the middle position that mates with the arc-shaped protrusion 4-1 in the middle of the upper housing 4. A sealing groove 3-2 is located along the upper edge of the lower housing 3. The upper housing 4... A sealing protrusion 4-3 should be provided. The upper housing 4 and the lower housing 3 are connected by the sealing protrusion 4-3 and the sealing groove 3-2 to achieve a sealing effect. After the upper housing 4 and the lower housing 3 are connected, they form a communicating U-shaped sound outlet channel 5. An inverted microphone 6 is connected to the upper housing 4 by a second long screw 9. More specifically, the second long screw 9 passes through the screw hole of the lower housing 3 and connects to the second blind threaded hole 4-6 of the upper housing 4, thereby fixing the inverted microphone 6 to the lower housing 3 and the upper housing 4. The side wall of body 3 is also provided with a connection hole 3-3 for connecting with external connectors when needed. The inverted microphone 6 includes a microphone shell 6-1 and a microphone top cover 6-2 connected to the microphone shell 6-1. The microphone top cover 6-2 is provided with a sound hole 6-2-1 that communicates with the first sound outlet hole 4-2 at the bottom of the arc-shaped protrusion 4-1 of the upper shell 4. A U-shaped iron 6-3, a magnet 6-4 and a washer 6-5 are installed in the microphone shell 6-1. A throat plug 8 is installed in the microphone top cover 6-2. A voice coil 7 is installed on top of the throat plug 8.

[0019] In use, this invention connects a lower housing 3 and an upper housing 4 via an L-shaped bracket 1. After the lower housing 3 and the upper housing 4 are connected, a U-shaped sound outlet channel 5 perpendicular to both the upper housing 4 and the lower housing 3 is formed. Correspondingly, an inverted microphone 6 is connected to the upper housing 4 for use as a standalone 50W speaker. This invention can also connect two lower housings 3 and two upper housings 4 simultaneously via the L-shaped bracket 1. After the two upper housings 4 and the two lower housings 3 are connected, two interconnected U-shaped sound outlet channels perpendicular to both the upper housings 4 and the lower housing 3 are formed. The dual U-shaped sound outlet channel has two inverted microphones 6 installed in the two upper housings 4, which are combined as a pair to be used as a 100W speaker, which can meet the needs of speakers with different power. When working, the alarm sound is emitted from the sound hole on the cover of the inverted microphone 6, and enters the U-shaped sound outlet channel 5 formed by the docking of the upper housing 4 and the lower housing 3 through the first sound outlet hole 4-2 at the bottom of the arc-shaped protrusion of the upper housing 4. After being reflected by the inner wall of the lower housing 3, it is then propagated out through the U-shaped sound outlet channel 5. The sound quality is full and soft, and has the advantages of strong directionality, high power and high efficiency.

Claims

1. An alarm speaker, comprising an L-shaped bracket (1), characterized in that, The L-shaped bracket (1) has a first screw hole (1-1) on its upright plate and is connected to a lower housing (3) and an upper housing (4) by a first long screw (2). The lower middle end of the upper housing (4) has a downward arc-shaped protrusion (4-1). The bottom of the arc-shaped protrusion (4-1) of the upper housing (4) has a first sound outlet (4-2). The left and right sides of the arc-shaped protrusion (4-1) of the upper housing (4) have rectangular second sound outlets (4-4). The middle position of the lower housing (3) has an arc-shaped groove (3-1) that matches the middle arc-shaped protrusion (4-1) of the upper housing (4). The upper edge of the lower housing (3) has a sealing groove (3-2). The upper housing (4) has a corresponding sealing protrusion (4-3). The upper housing (4) and the lower housing (3) are connected by a seal. The protrusion (4-3) and the sealing groove (3-2) are connected to each other. After the upper shell (4) and the lower shell (3) are connected to each other, a U-shaped sound outlet channel (5) is formed. An inverted microphone (6) is connected in the upper shell (4) with a second long screw (9). The inverted microphone (6) includes a microphone shell (6-1) and a microphone top cover (6-2) connected to the microphone shell (6-1). A sound hole (6-2-1) is provided on the microphone top cover (6-2) and communicates with the first sound outlet hole (4-2) at the bottom of the arc-shaped protrusion (4-1) of the upper shell (4). A U-shaped iron (6-3), a magnet (6-4) and a washer (6-5) are installed in the microphone shell (6-1). A throat plug (8) is installed in the microphone top cover (6-2). A voice coil (7) is installed on the throat plug (8).

2. An alarm speaker according to claim 1, characterized in that, Two lower housings (3) and two upper housings (4) are connected to the upright plate of the L-shaped bracket (1) by first long screws (2). After the two upper housings (4) and the two lower housings (3) are connected, two interconnected double U-shaped sound channels perpendicular to the two upper housings (4) and the two lower housings (3) are formed.

3. An alarm speaker according to claim 1 or 2, characterized in that, The first long screw (2) passes through the screw hole of the lower housing (3) and connects to the first blind threaded hole (4-5) of the upper housing (4), thereby fixing the lower housing (3) and the upper housing (4) to the L-shaped bracket (1).

4. An alarm speaker according to claim 3, characterized in that, The L-shaped bracket (1) has a second screw hole (1-2) on its cross plate for connecting to the vehicle body during use.

5. An alarm speaker according to claim 1 or 2, characterized in that, The second long screw (9) passes through the screw hole of the lower housing (3) and connects to the second blind threaded hole (4-6) of the upper housing (4), thereby fixing the inverted tone head (6) to the lower housing (3) and the upper housing (4).

6. An alarm speaker according to claim 5, characterized in that, The lower housing (3) is also provided with connection holes (3-3) on its side wall for connecting with external connectors when needed.

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