Wall-mounted sound box for teaching

Abstract

The utility model relates to a wall-mounted sound box for teaching, and belongs to the technical field of sound boxes. A box body comprises a rear side bottom plate which is vertically arranged, a partition plate is arranged in the box body to form a first sound production box body and a second sound production box body which are relatively independent and are arranged in a left-right spaced mode, and a first loudspeaker installation panel is arranged on the left front portion of the rear side bottom plate. A loudspeaker sounding axis on the first loudspeaker mounting panel obliquely points to the left front part of the box body relative to the front-back direction of the box body, and is obliquely arranged downwards relative to the horizontal plane; the second loudspeaker installation panel is arranged on the right front portion of the rear side bottom plate, and the loudspeaker sounding axis on the second loudspeaker installation panel obliquely points to the right front portion of the box body relative to the front-back direction of the box body and is obliquely arranged downwards relative to the horizontal plane. According to the utility model, rapid installation and debugging can be conveniently realized, the influence of the indoor environment on the sound box effect can be reduced, the sound effect in a field can be obviously improved in a teaching scene, the number of sound box devices is reduced, and the construction difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to a wall-mounted sound box for teaching, belonging to the technical field of sound. Background Art

[0002] Nowadays, the use of multimedia equipment in classrooms has become more and more popular, and audio equipment is very common in classrooms. It is mainly used to play recordings, courseware, voice notifications and other content. Speakers are an important part of audio equipment. At present, the most commonly used speakers are wall-mounted, symmetrically suspended and installed in the upper part of the front of the classroom (for details, please refer to Figure 1 ), or symmetrically hang on the walls on both sides of the classroom (for details, please refer to Figure 2 ) to play sound to the entire classroom. The more common speakers on the market are currently in the shape of a rectangular parallelepiped or a prism that is wide in front and narrow in the back to help diffuse sound. However, the vertical angle of the sound amplification of this type of speaker easily directs the sound to the ceiling and the top beam structure. The sound reflected from the ceiling and the top beam is easily mixed with the sound directly emitted by the speaker, and the students cannot hear clearly, which affects the teaching efficiency. In addition, in order to improve the lighting effect, modern school classrooms usually adopt a larger floor height and a whole glass wall design. Its layout also has a great impact on the indoor sound amplification of the speaker. The glass has a high density and strong sound wave reflection characteristics, which has a more obvious effect on the treble, which will reduce the frequency range of the rebound sound. At the same time, the reflected treble directly affects the listening effect and is prone to howling. If the speaker is installed in the front of the classroom, there are also disadvantages such as short propagation distance of the speaker, loud sound in the front row, and inability to take into account the students in the back row of the classroom; if the speaker is installed on both sides of the classroom, there is a disadvantage that it is not convenient to install the speaker on one side of the glass wall (insufficient space and difficult speaker cable wiring). To sum up, during the specific installation and debugging, in order to obtain better sound reinforcement effects, the above-mentioned traditional speakers usually require additional brackets to adjust their horizontal and vertical installation angles, which requires construction personnel to have professional knowledge related to speakers and to perform professional debugging for different installation locations and scenes, which places high technical requirements on the installation and construction.

[0003] After searching and checking, the utility model patent document with announcement number CN218830503U is closest to the technical solution of this application. The utility model discloses a suspended anti-interference audio system for classrooms, including a box, which is divided into an upper box and a lower box by a horizontal partition, a woofer is installed in the upper box, and a tweeter is installed in the lower box; the front sides of the upper box and the lower box are both provided with mesh covers, wherein the front side of the upper box is vertically arranged, and the front side of the lower box is tilted downward. The utility model adjusts the range of the vertical angle of the sound played by the speaker (i.e., the central angle of the range of directly transmitted sound in the vertical direction) by setting the front side of the upper box vertically and the front side of the lower box tilted downward, and because the higher the frequency of the sound wave, the easier it is to be interfered, a partition is set to separate the high-frequency speaker and the low-frequency speaker, so as to make the high-frequency sound waves directly transmitted to the students as much as possible, to ensure that the sound is directly transmitted to the students' ears without reflection as much as possible, and to reduce interference. However, this solution mainly uses a single tweeter to amplify sound, and the coverage range is small. Usually, multiple speakers need to be installed to achieve full coverage of the classroom. The installation efficiency is low, and its installation design does not consider the impact of glass walls on the indoor sound amplification of the speakers. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a wall-mounted speaker for teaching, which can be easily installed and debugged quickly, solve the sound amplification optimization in a standard classroom venue, and reduce the influence of the indoor environment on the sound amplification effect of the speaker.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a wall-mounted speaker for teaching, comprising a box body with a wall-mounted installation structure, the box body comprising a rear bottom plate for installation facing the wall, the rear bottom plate is vertically arranged, a partition is arranged in the box body to form a relatively independent first sound box body and a second sound box body, the first sound box body has a first speaker mounting panel, the second sound box body has a second speaker mounting panel, the first speaker mounting panel and the second speaker mounting panel are respectively installed with speakers, the partition is vertically arranged, the partition is perpendicular to the rear bottom plate, the first sound box body and the second sound box body are arranged at left and right intervals, the first speaker mounting panel is arranged at the left front of the rear bottom plate, the speaker sound axis on the first speaker mounting panel is inclined relative to the front and rear direction of the box body and points to the left front of the box body, and is arranged downwardly relative to the horizontal plane; the second speaker mounting panel is arranged at the right front of the rear bottom plate, the speaker sound axis on the second speaker mounting panel is inclined relative to the front and rear direction of the box body and points to the right front of the box body, and is arranged downwardly relative to the horizontal plane.

[0006] A further preferred scheme is: the horizontal direction from the back side of the box to the front side is set as the first direction, and the vertical direction from the top plate of the box to the bottom plate is set as the second direction; the projection angle formed by the speaker sound axis on the first speaker mounting panel relative to the first direction on the horizontal plane is set to a first inclination angle, and the projection angle formed on the partition relative to the second direction is set to a second inclination angle, the angle value of the first inclination angle is 30° to 60°, and the angle value of the second inclination angle is 20° to 75°; the projection angle formed by the speaker sound axis on the second speaker mounting panel relative to the first direction on the horizontal plane is set to a third inclination angle, and the projection angle formed on the partition relative to the second direction is set to a fourth inclination angle, the angle value of the third inclination angle is 30° to 60°; the angle value of the fourth inclination angle is 20° to 75°.

[0007] A further preferred solution is that the first sound box and the second sound box are arranged in mirror symmetry with respect to the partition.

[0008] A further preferred solution is that the first speaker mounting panel and the second speaker mounting panel are respectively connected to the rear bottom plate via transition connecting plates.

[0009] A further preferred solution is that each transition connecting plate is respectively provided with a phase-conducting pipe connecting the inner cavity of the box body and the external space.

[0010] A further preferred solution is that protective covers are arranged on the outer surfaces of the transition connecting plate, the first speaker mounting panel and the second speaker mounting panel.

[0011] A further preferred solution is that the speakers on the first speaker mounting panel include at least one tweeter and at least one woofer; the speakers on the second speaker mounting panel include at least one tweeter and at least one woofer.

[0012] A further preferred solution is: comprising a PCB circuit board, and the PCB circuit board is fixedly arranged on the top plate of the box body.

[0013] A further preferred solution is: comprising a wiring seat, the wiring seat is fixedly arranged on the rear bottom plate of the box body.

[0014] A further preferred scheme is: the wall-mounted installation structure includes a hanging bracket, the hanging bracket includes a hanging plate, both ends of the hanging plate are fixedly connected with L-shaped connecting plates, the first end of the L-shaped connecting plate is vertically connected to the hanging plate, and the second end is extended in a direction away from the center of the hanging plate, and the second end of the L-shaped connecting plate is fixedly connected to the rear bottom plate of the box body through a bolt connection structure; a hanging fixing hole is provided on the hanging plate, and the hanging fixing hole includes a first matching hole and a second matching hole connected to each other through a strip groove, the first matching hole is located directly above the second matching hole, the diameter of the first matching hole is smaller than the diameter of the second matching hole, and the width of the strip groove is consistent with the diameter of the first matching hole.

[0015] The beneficial effects of the utility model are as follows: during implementation, a speaker can be fixedly installed on the opposite side of the classroom glass wall, and there is no need to repeatedly adjust the angle of the speaker bracket according to the sound orientation and effect of the classroom scene, which greatly simplifies the installation and debugging work, is simple to construct, and has low installation costs. A group of speakers are installed on the first speaker installation panel and the second speaker installation panel respectively, and the entire speaker has two groups of speakers (2 or more speakers in each group), which are tilted to the left and right directions to emit sound respectively (corresponding to the front and back directions of the classroom after installation), and the sound axis of all speakers is tilted downward relative to the horizontal plane, which can better ensure that the sound is directed toward the listener's head and avoids the position of the glass wall (or glass window). The speaker amplifies the sound directly to the user, is not affected by the rebound of the glass and the interference of the beams on the top of the room, and improves the sound amplification effect; the two-way sound emission can also ensure that the sound evenly covers every corner of the classroom. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the plane layout of a traditional speaker installation method in the prior art.

[0017] Figure 2 It is a schematic diagram of the plan layout of the second traditional speaker installation method in the prior art.

[0018] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 4 yes Figure 3 The illustrated embodiment is a schematic diagram of the overall structure when the protective cover is not installed.

[0020] Figure 5 yes Figure 3 Front view of the illustrated embodiment.

[0021] Figure 6 yes Figure 3 Side view of the illustrated embodiment.

[0022] Figure 7 yes Figure 3 Rear view of the illustrated embodiment.

[0023] Figure 8 yes Figure 5 YY section view in.

[0024] Fig. 9 It is a schematic diagram of the plane layout when the utility model is installed.

[0025] Fig.10 It is a schematic diagram of the projection relationship of the speaker installation angle on the horizontal plane in the utility model.

[0026] Fig.11 It is a schematic diagram of the projection relationship of the speaker installation angle on the vertical plane where the left side of the partition is located in the utility model.

[0027] Fig.12 It is a schematic diagram of the projection relationship of the speaker installation angle on the vertical plane where the right side of the partition is located in the utility model.

[0028] Fig.13 It is a three-dimensional structural schematic diagram of the suspension bracket in the utility model.

[0029] Markings in the figure: box 1, rear bottom plate 2, partition 3, first sound box 4, second sound box 5, first speaker mounting panel 6, second speaker mounting panel 7, speaker 8, transition connecting plate 9, phase guide tube 10, protective cover 11, suspension bracket 12, suspension plate 121, L-shaped connecting plate 122, hanging fixing hole 123, strip groove 124, first matching hole 125, second matching hole 126, wiring socket 13, traditional sound box 20, glass wall 30, speaker sound axis 40. DETAILED DESCRIPTION

[0030] The utility model will be further described below in conjunction with the accompanying drawings.

[0031] like Figures 3 to 13As shown, the utility model includes a box body 1 with a wall-mounted installation structure, the box body 1 includes a rear bottom plate 2 for installation facing the wall, the rear bottom plate 2 is vertically arranged, a partition 3 is arranged in the box body 1 to form a relatively independent first sound box body 4 and a second sound box body 5, the first sound box body 4 has a first speaker installation panel 6, the second sound box body 5 has a second speaker installation panel 7, the first speaker installation panel 6 and the second speaker installation panel 7 are respectively installed with speakers 8, the partition 3 is vertically arranged, the partition 3 is perpendicular to the rear bottom plate 2, the first sound box body 4 and the second sound box body 5 are arranged at intervals on the left and right, the first speaker installation panel 6 is arranged at the left front of the rear bottom plate 2, the sound axis of the speaker 8 on the first speaker installation panel 6 is inclined relative to the front and rear direction of the box body 1 and is arranged downwardly with respect to the horizontal plane; the second speaker installation panel 7 is arranged at the right front of the rear bottom plate 2, the sound axis of the speaker 8 on the second speaker installation panel 7 is inclined relative to the front and rear direction of the box body 1 and is arranged downwardly with respect to the horizontal plane.

[0032] Specifically, the main structure of the box 1 can refer to the existing technology implementation, which is generally made of a hard shell + EVA foam. The key technical point of the utility model lies in the shape of the box 1 and the layout design of the sound axis direction of the speaker 8. The sound axis direction of the speaker 8 usually refers to the axis of the speaker 8 itself in the art, and is pointed from the body of the speaker 8 to the sound propagation object (i.e., the audience). The axis of the speaker 8 is usually perpendicular to its corresponding speaker installation panel. It can be understood that the direction of the sound axis of the speaker 8 determines the specific design angle of the speaker installation panel.

[0033] A group of speakers 8 are respectively installed on the first speaker installation panel 6 and the second speaker installation panel 7 in the utility model, and the whole speaker box has two groups of speakers 8 (in order to have a better sound amplification effect, usually 2 or more speakers 8 are arranged in each group), which are tilted to emit sound in the left and right directions (corresponding to the front and back directions of the classroom after installation), and the sound-producing axes of all speakers 8 are tilted downward relative to the horizontal plane, which can better ensure that the sound is directed toward the listener's head and avoids the position of the glass wall 30 (or glass window). The speaker box amplifies the sound directly to the user, is not affected by the rebound of the glass and the interference of the beams on the top of the room, and improves the sound amplification effect; the two-way sound emission can also ensure that the sound evenly covers every corner of the classroom.

[0034] It is understandable that the specific inclination angle involved in the pronunciation axis direction of the speaker 8 of the utility model can be customized according to the actual layout of the classroom. In the conventional scheme, according to the "GB50118-2010 Civil Building Sound Insulation Design Code", "Primary and Secondary School Building Design Code GBJ99-86", "Primary and Secondary School Design Code GB50099-20111" and other materials, it can be learned that the indoor floor height of the teaching scene is generally 2.5 meters to 3.4 meters, the window is generally 0.8 meters to 1 meter from the ground, the height of the classroom tables and chairs is generally 0.75 meters, and the height of the classroom beams is generally 0.5 meters to 0.7 meters. Therefore, the specific inclination angle involved in the pronunciation axis direction of the speaker 8 of the utility model can preferably be taken according to the following parameter range, setting the horizontal direction from the back side of the box body 1 to the front side as the first direction, and the vertical direction from the top plate of the box body 1 to the bottom plate as the second direction. The direction is set to the second direction; the projection angle formed by the sound axis of the speaker 8 on the first speaker installation panel 6 relative to the first direction on the horizontal plane is set to the first tilt angle A, and the projection angle formed on the partition 3 relative to the second direction is set to the second tilt angle C. The angle value of the first tilt angle A is 30° to 60°, and the angle value of the second tilt angle C is 20° to 75°; the projection angle formed by the sound axis of the speaker 8 on the second speaker installation panel 7 relative to the first direction on the horizontal plane is set to the third tilt angle B, and the projection angle formed on the partition 3 relative to the second direction is set to the fourth tilt angle D. The angle value of the third tilt angle B is 30° to 60°; the angle value of the fourth tilt angle D is 20° to 75°. The schematic diagram of the first tilt angle A and the third tilt angle B can be found in Fig.10 The schematic diagram of the second inclination angle C can be found in Fig.11 The schematic diagram of the fourth inclination angle D can be found in Fig.12 In the preferred embodiment of the present invention, the first sound box 4 and the second sound box 5 are arranged in mirror symmetry with respect to the partition 3, that is, the first inclination angle A and the third inclination angle B have the same value, and the second inclination angle C and the fourth inclination angle D have the same value.

[0035] In order to facilitate processing and improve the sound amplification effect, the first speaker mounting panel 6 and the second speaker mounting panel 7 are respectively connected to the rear bottom plate 2 through a transition connecting plate 9. Further preferably, each transition connecting plate 9 is respectively installed with a phase guide tube 10 connecting the inner cavity of the box body 1 and the external space. The phase guide tube 10 is used as a sound guide hole of the speaker. When the speaker 8 of the speaker vibrates, the airflow can go out from the phase guide tube 10 to avoid affecting the sound amplification effect.

[0036] Preferably, the outer surfaces of the transition connecting plate 9, the first speaker mounting panel 6 and the second speaker mounting panel 7 are all provided with a protective cover 11. The protective cover 11 mainly plays a role of dust prevention and also has a certain degree of protection effect on the speaker 8. The protective cover 11 can be made of metal, plastic, cloth and other materials.

[0037] As mentioned above, each group of speakers 8 can generally be designed to be multiple. Preferably, the speakers 8 on the first speaker mounting panel 6 include at least one tweeter and at least one woofer; the speakers 8 on the second speaker mounting panel 7 include at least one tweeter and at least one woofer. Usually, the axes of the tweeters and woofers of the same group are located in the same vertical plane, with the woofers on the top and the tweeters on the bottom.

[0038] Specifically, the speaker generally includes a PCB circuit board and a terminal block 13. For the convenience of wiring, the PCB circuit board is preferably fixedly arranged on the top plate of the box body 1; the terminal block 13 is preferably fixedly arranged on the rear bottom plate 2 of the box body 1. The terminal block 13 is a part used to arrange components such as speaker terminals. In some alternative embodiments, the PCB circuit board can also be designed on the rear bottom plate 2 of the box body 1.

[0039] During implementation, the utility model can fix a speaker on the opposite side of the classroom glass wall without adjusting the angle of the speaker bracket, which greatly simplifies the installation and debugging work, is simple to construct, and has low installation costs. To further facilitate installation and fixation, the wall-mounted installation structure described in the utility model includes a suspension bracket 12, and the suspension bracket 12 includes a suspension plate 121. Both ends of the suspension plate 121 are respectively fixedly connected with L-shaped connecting plates 122. The first end of the L-shaped connecting plate 122 is vertically connected to the suspension plate 121 (the vertical connection here should be understood in a broad sense, and there may be a transition fillet at the right angle position of the connection. The suspension bracket 12 can usually adopt an integrally formed sheet metal part), and the second end of the L-shaped connecting plate 122 faces away from the center of the suspension plate 121. The L-shaped connecting plate 122 is arranged to extend in the direction of the center of the housing 1, and the second end of the L-shaped connecting plate 122 is fixedly connected to the rear bottom plate 2 of the housing 1 through a bolt connection structure; a hanging fixing hole 123 is provided on the hanging plate 121, and the hanging fixing hole 123 includes a first matching hole 125 and a second matching hole 126 which are interconnected through a strip groove 124, and the first matching hole 125 is located directly above the second matching hole 126, and the diameter of the first matching hole 125 is smaller than the diameter of the second matching hole 126, and the width of the strip groove 124 is consistent with the diameter of the first matching hole 125. In specific implementation, each hanging bracket 12 can be designed with one or more hanging fixing holes 123. The utility model preferably adopts three independently arranged hanging brackets 12, and each hanging bracket 12 is respectively provided with a hanging fixing hole 123. When installing, a fixing bolt is set on the wall for hanging installation, and the diameter of the first matching hole 125 corresponds to the diameter of the rod of the fixing bolt, and the diameter of the second matching hole 126 corresponds to the diameter of the head of the fixing bolt.

Claims

1. A wall-mounted speaker for teaching, comprising a box (1) having a wall-hanging installation structure, the box (1) comprising a rear bottom plate (2) for installation facing the wall, the rear bottom plate (2) being arranged vertically, a partition plate (3) being arranged inside the box (1) to form a relatively independent first sound box (4) and a second sound box (5), the first sound box (4) having a first speaker installation panel (6), the second sound box (5) having a second speaker installation panel (7), the first speaker installation panel (6) and the second speaker installation panel (7) being respectively installed with speakers (8), characterized in that: The partition (3) is arranged vertically, the partition (3) is perpendicular to the rear bottom plate (2), the first sound box (4) and the second sound box (5) are arranged at intervals on the left and right, the first speaker installation panel (6) is arranged at the left front of the rear bottom plate (2), the sound axis of the speaker (8) on the first speaker installation panel (6) is inclined relative to the front and rear direction of the box (1) and points to the left front of the box (1), and is arranged downwardly with respect to the horizontal plane; the second speaker installation panel (7) is arranged at the right front of the rear bottom plate (2), the sound axis of the speaker (8) on the second speaker installation panel (7) is inclined relative to the front and rear direction of the box (1) and points to the right front of the box (1), and is arranged downwardly with respect to the horizontal plane.

2. The wall-mounted speaker for teaching as claimed in claim 1, characterized in that: The horizontal direction from the rear side of the box body (1) to the front side is set as the first direction, and the vertical direction from the top plate to the bottom plate of the box body (1) is set as the second direction; the projection angle formed by the sound axis of the speaker (8) on the first speaker installation panel (6) relative to the first direction on the horizontal plane is set as the first tilt angle (A), and the projection angle formed on the partition (3) relative to the second direction is set as the second tilt angle (C), the angle value of the first tilt angle (A) is 30° to 60°, and the angle value of the second tilt angle (C) is 20° to 75°; the projection angle formed by the sound axis of the speaker (8) on the second speaker installation panel (7) relative to the first direction on the horizontal plane is set as the third tilt angle (B), and the projection angle formed on the partition (3) relative to the second direction is set as the fourth tilt angle (D), the angle value of the third tilt angle (B) is 30° to 60°; the angle value of the fourth tilt angle (D) is 20° to 75°.

3. The wall-mounted speaker for teaching as claimed in claim 2, characterized in that: The first sound box (4) and the second sound box (5) are arranged in a mirror-symmetrical manner relative to the partition (3).

4. The wall-mounted speaker for teaching as claimed in claim 3, characterized in that: The first speaker installation panel (6) and the second speaker installation panel (7) are respectively connected to the rear bottom plate (2) via transition connecting plates (9).

5. The wall-mounted speaker for teaching as claimed in claim 4, characterized in that: A phase-conducting pipe (10) for connecting the inner cavity of the box body (1) and the external space is installed on each transition connecting plate (9).

6. The wall-mounted speaker for teaching as claimed in claim 5, characterized in that: Protective covers (11) are arranged on the outer surfaces of the transition connecting plate (9), the first speaker mounting panel (6) and the second speaker mounting panel (7).

7. The wall-mounted speaker for teaching as claimed in any one of claims 1 to 6, characterized in that: The speaker (8) on the first speaker mounting panel (6) includes at least one tweeter and at least one woofer; the speaker (8) on the second speaker mounting panel (7) includes at least one tweeter and at least one woofer.

8. The wall-mounted speaker for teaching as claimed in any one of claims 1 to 6, characterized in that: It comprises a PCB circuit board, which is fixedly arranged on the top plate of the box body (1).

9. The wall-mounted speaker for teaching as claimed in any one of claims 1 to 6, characterized in that: It comprises a wiring seat (13), which is fixedly arranged on the rear bottom plate (2) of the box body (1).

10. The wall-mounted speaker for teaching as claimed in any one of claims 1 to 6, characterized in that: The wall-suspended installation structure comprises a suspension bracket (12), the suspension bracket (12) comprises a suspension plate (121), both ends of the suspension plate (121) are respectively fixedly connected with L-shaped connecting plates (122), the first end of the L-shaped connecting plate (122) is vertically connected to the suspension plate (121), the second end is extended in a direction away from the center of the suspension plate (121), and the second end of the L-shaped connecting plate (122) is fixed to the rear bottom plate (2) of the box body (1) through a bolt connection structure. Connection; A hanging fixing hole (123) is provided on the hanging plate (121), and the hanging fixing hole (123) includes a first matching hole (125) and a second matching hole (126) which are interconnected through a strip groove (124), the first matching hole (125) is located directly above the second matching hole (126), the diameter of the first matching hole (125) is smaller than the diameter of the second matching hole (126), and the width of the strip groove (124) is consistent with the diameter of the first matching hole (125).

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