Independent demonstration device with sound focusing function

Abstract

The utility model belongs to the technical field of science popularization demonstration, and particularly relates to an independent demonstration device with a sound focusing function. The device comprises two groups of reflecting assemblies which are arranged in pairs, concave surfaces of the two groups of reflecting assemblies are opposite to each other, and each reflecting assembly further comprises an adjusting part which is used for driving the concave surface to perform pitching switching between a horizontal state and an elevation state; and a sound reflecting plate with a horizontal plate surface is arranged above the middle parts of the two groups of reflecting components, so that when the two groups of concave surfaces are in an elevation state, sound can be emitted from the concave surface of one group of reflecting component and then is reflected to the concave surface of the other group of reflecting component through the sound reflecting plate. The multi-working-condition sound transmission demonstration instrument has the advantage of compact structure, has the multi-working-condition demonstration effects of linear sound transmission and simulated cross-obstacle sound transmission, and is high in use flexibility and stronger in interactivity and interestingness.

Description

Technical Field

[0001] The utility model belongs to the technical field of popular science demonstration, and in particular relates to an independent demonstration device with a sound focusing function. Background Art

[0002] Acoustic focusing refers to the phenomenon that the concave surface forms a concentrated reflection of the sound wave, so that the reflected sound is focused in a certain area, causing the sound to be particularly loud in that area. As a popular science display device, related acoustic focusing devices have been used in various popular science exhibition halls, such as the Chinese patent announcement number "CN210667394U" named "A kind of acoustic focusing demonstration device", which can not only realize the acoustic focusing function through the concave surface, but also rely on the adjustment of the concave opening, that is, the change of the concave curvature, to realize the change of the acoustic focal point, but it obviously does not have a higher interactive effect. To this end, the Chinese patent announcement number "CN107316545A" entitled "A variable focal length sound focusing demonstration device and method" further proposed the concept of "paired design", that is, through the concave surfaces arranged in pairs, to achieve the effect that one participant speaks from one concave surface, while the other participant answers at another concave surface, which enhances the interactivity and fun, but still has the following defects: First, when using the above-mentioned paired design device, it is obvious that a single person cannot stand at two concave surfaces at the same time, so two people are still required to operate it, which is obviously slightly lacking in the form of interactive acceptance. Second, as in the above-mentioned single set of concave surfaces, it still adopts an independent fixing method, so when it is disassembled and transported to the exhibition hall and reassembled, or when the position of the concave surface is moved during maintenance, the relative footholds of the speaker and the receiver need to be repositioned, and the workload of assembly and maintenance is significantly increased. More importantly, sound focusing is not only reflected in the horizontal relative sound transmission process, but also in other forms of sound transmission such as crossing obstacles. How to demonstrate it more by relying on the above-mentioned devices to enhance the fun of interaction is also a technical problem that technicians in this field need to solve urgently in recent years. Summary of the invention

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide an independent demonstration device with a sound focusing function, which has the advantages of a compact structure, combines the multi-working condition demonstration effects of linear sound transmission and simulated cross-obstacle sound transmission, is highly flexible in use, and is more interactive and interesting.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An independent demonstration device with a sound focusing function comprises two groups of reflection components arranged in pairs, the concave surfaces of the two groups of reflection components are opposite to each other, and is characterized in that: the reflection components also include an adjustment part for driving the concave surfaces to switch between a horizontal state and an elevation state; a sound reflection plate with a horizontally arranged plate surface is arranged above the middle of the two groups of reflection components, so that when the two groups of concave surfaces are in the elevation state, sound energy is emitted from the concave surface of one group of reflection components and then reflected to the concave surface of the other group of reflection components via the sound reflection plate.

[0006] Preferably, the reflective assembly also includes a base for mounting the concave surface, a rocker arm extending from the back of the concave surface, and the middle part of the rocker arm is hinged to the base through a horizontal hinge axis; the operating end of the rocker arm is horizontally hinged to one end of the connecting rod, and the other end of the connecting rod is eccentrically mounted on the coaxial turntable of the rotating motor.

[0007] Preferably, the sound reflection plate is in the shape of an elliptical disk, and the long axis direction is parallel to the arrangement direction of the two groups of reflection components; the sound reflection plate is suspended at the top mounting surface by means of a vertical pull rod.

[0008] Preferably, the sound reflecting plate is split from each other at the short axis to form a two-lobed structure, and the middle parts of the two-lobed structure are fastened to each other at the short axis by tension bolts; ears are arranged at the two long axis ends of the sound reflecting plate, one end of the oblique pull rope is fixed at the ear, and the other end extends obliquely and is fixed at the pre-anchor point at the top mounting surface; the pre-anchor point, the oblique pull rope and the ear that cooperate with each other form a group of positioning units, the two oblique pull ropes of the two groups of positioning units cross each other, and the positioning units are symmetrically arranged with each other along the short axis of the sound reflecting plate; in the projection in the top view direction, the oblique pull rope is located on the long axis of the sound reflecting plate.

[0009] Preferably, a steel frame is arranged on the back of the sound reflection plate, and the vertical tie rods, tension bolts and positioning units are all installed on the steel frame.

[0010] Preferably, the base includes a horizontal section and an inclined section extending obliquely upward from the end of the horizontal section, so that the horizontal section and the inclined section form an angle structure, and the openings of the bases of the two groups of reflective components are opposite to each other; the concave surface is installed at the top of the inclined section, and a foothold for participants to stand is arranged on the upper surface of the horizontal section.

[0011] Preferably, a Forma wheel is arranged on the lower plate surface of the horizontal section.

[0012] Preferably, a positioning groove with an upward opening for placing a sound source is installed at the sound focusing point of the concave surface.

[0013] Preferably, three positioning rods are evenly distributed along the axial direction of the concave surface, the top ends of the positioning rods are adjacent to each other and connected to each other through a positioning plate, the speaker is arranged on the side of the positioning plate facing the concave surface, and a play button for turning the speaker on and off is provided on the side of the positioning plate facing the participant; the positioning groove is installed on the side of the positioning plate facing the concave surface, and avoids each other with the installation position of the speaker.

[0014] The beneficial effects of the utility model are:

[0015] 1) Based on the two sets of traditional reflective components arranged in pairs and radiating horizontally, on the one hand, the two sets of reflective components are dynamically designed so that the two sets of concave surfaces of the two sets of reflective components have a pitch switching effect; on the other hand, in conjunction with the sound reflection plate, the utility model realizes the multi-condition demonstration effect between linear sound transmission and simulated cross-barrier sound transmission. The utility model has the advantages of compact structure, high flexibility of use, and stronger interactivity and fun.

[0016] 2) For the adjustment part, it can adopt a screw nut adjustment mechanism, or a crank rocker mechanism, etc.; the utility model uses a rocker arm with a connecting rod to change the rotation of the rotating motor into the swinging motion of the rocker arm; at the same time, the swing angle of the rocker arm is limited by the eccentric installation position of the coaxial turntable, thereby ensuring the precise switching effect of the pitch state, and it is very flexible and convenient to use.

[0017] 3) The function of the sound reflection board is to achieve the sound reflection effect after being suspended in the air; therefore, on the one hand, the size of the sound reflection board should be designed to be larger, so it is designed to be split in half and combined with a steel frame to facilitate modular assembly; on the other hand, the design of the vertical pull rod, tension bolts and positioning unit further ensures the horizontality of the sound reflection board, and the working reliability and stability are significantly guaranteed.

[0018] 4) As for the base, it is an integrated structure formed by a horizontal section and an inclined section, so as to achieve a stable position of the foothold relative to the concave surface. Even when it is disassembled and transported to the exhibition hall and reassembled, or when the concave surface is moved during maintenance, there is no need to reposition the relative footholds of the speaker and the receiver, or the workload of positioning is reduced, thus improving the convenience of equipment use.

[0019] 5) Based on the above structure, the utility model has both double-person and single-person functions. When used by two people, the speaker and receiver stand normally; when used by one person, the sound source such as a mobile phone is directly placed in the pre-designed positioning groove to act as the speaker, and the speaker can go to another concave surface to achieve the effect of single-person answering, which is more flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the working state of the utility model when the concave surface is in an elevation state;

[0021] Figure 2 for Figure 1 A top view of the structure;

[0022] Figure 3 is a structural schematic diagram of a sound reflection plate;

[0023] Figure 4 It is a schematic diagram of the structure of a single set of reflection components;

[0024] Figure 5 for Figure 4 A partial enlarged view of part I;

[0025] Figure 6 for Figure 4 A partial enlarged view of part II.

[0026] The actual correspondence between the reference numbers and component names of the utility model is as follows:

[0027] 10-concave surface; 11-positioning groove; 12-positioning rod; 13-positioning plate; 14-speaker; 15-play button;

[0028] 20-adjusting part; 21-swing rod; 22-horizontal hinge shaft; 23-connecting rod; 24-coaxial turntable; 25-rotating motor;

[0029] 30-sound reflection board;

[0030] 40-base; 41-horizontal section; 42-inclined section;

[0031] 50-Steel frame;

[0032] 61-vertical pull rod; 62-diagonal pull rope. DETAILED DESCRIPTION

[0033] For ease of understanding, here we combine Figure 1-6 The specific structure and working mode of the utility model are further described as follows:

[0034] The concave surface 10 can form concentrated reflection for the sound waves, so that the reflected sound is focused in a certain area, making the sound in that area particularly loud. In life, when the sound source in the room makes a sound, the sound waves will be reflected when they hit the wall, ceiling, and floor. The sound reflection follows the law of reflection. When the incident sound wave hits the reflector that is a concave surface, the reflected sound will be concentrated together to form sound focusing, which is similar to light focusing. When the incident sound wave hits the reflector that is a plane, the reflected sound will be refracted to form a barrier-crossing sound transmission effect.

[0035] It is based on the above that reference Figure 1-6As shown, the main structure of the utility model adds the demonstration feature of simulating obstacle crossing on the basis of the reflection components arranged in pairs, thereby improving the overall operation experience. More specifically, on the one hand, the utility model adopts an adjustment part 20 that can adjust the concave surface 10 in pitch, so as to achieve the accurate switching effect of the concave surface 10 between the elevation state and the horizontal state; at this time, the adjustment part 20 preferably adopts an eccentric wheel coaxial turntable 24, so as to artificially control the swing amplitude of the swing rod 21, to ensure that the swing rod 21 can always control the concave surface 10 to achieve the only switching action between the horizontal state and the elevation state, so as to ensure the action stability between simulating obstacle crossing and horizontal direct emission. On the other hand, relying on the suspended sound reflection plate 30, the above-mentioned barrier-crossing sound transmission effect of the reflector being a plane can be achieved, with remarkable results.

[0036] For the sound reflection plate 30, refer to Figure 1-3 As shown, a steel frame 50 is arranged on the back, and the short axis of the two-petal structure, i.e., the joint surface, is fixed by tension bolts, and the positioning unit formed by the lifting lugs, the oblique tension ropes 62 and the pre-anchor points is used to achieve a modular installation effect for the sound reflection plate 30. At the same time, the vertical tension rods 61 are connected and fixed with the steel frame 50 and even the top installation surface to ensure a reliable positioning effect of the sound reflection plate 30.

[0037] For the adjustment unit 20, refer to Figure 4 and Figure 5 As shown, the adjustment part 20 can realize the switching function of the horizontal state and the elevation state of the concave surface 10 by utilizing the cooperation among the rotating motor 25, the coaxial turntable 24, the connecting rod 23, the swing rod 21 with the horizontal hinge shaft 22 and the final concave surface 10. Furthermore, for the base 40, it is an integrated structure formed by the horizontal section 41 and the inclined section 42, so as to achieve the effect of stabilizing the position of the foothold relative to the concave surface 10. Even when disassembling and transporting to the exhibition hall and reassembling, or when moving the position of the concave surface 10 during maintenance, there is no need to reposition the relative footholds of the speaker and the receiver, or reduce the workload of positioning, thereby improving the convenience of using the equipment.

[0038] Further, see Figure 4 and Figure 6 As shown, the utility model also has both double-person and single-person functions. When used by two people, the speaker's position and the listener's position are normally adopted, and the speaker can achieve the sound effect by relying on the speaker 14 by pressing the play button 15. When used by one person, the sound source such as a mobile phone is directly placed in the pre-designed positioning groove 11 to act as the speaker, and then the single-person answering effect can be achieved at another concave surface 10, which is more flexible to use. In actual design, the positioning groove 11 is arranged on the positioning plate 13, and is matched with the speaker 14 and the play button 15 to form a sound source playback system; you can choose one operation when using it. The entire positioning plate 13 is like Figure 4 and Figure 6 As shown, it is fixed at the edge of the concave surface 10 by a positioning rod 12, which will not be described in detail here.

[0039] At this point, the utility model avoids the defects of the existing structure of single interaction and inability to interact with one person or in a diversified manner, so that the demonstration effect of the exhibits can reach the best state, so that participants can fully understand the principle of parabola sound gathering, and optimize the demonstration effect. In addition, the structure is relatively simple and easy to maintain, which reduces the processing and manpower maintenance costs. At the same time, relying on the adjustment of the adjustment part 20, the diversified operation purpose of the utility model is achieved, and the application surface is further expanded. In addition, relying on the added positioning groove 11, the participants can independently control the sound source of the playback, and even one person can well understand and study the principle of the exhibits, which optimizes the demonstration effect, greatly increases the sense of participation of the participants, and further enhances the degree of knowledge of the principle of parabola sound gathering, with remarkable results.

[0040] Of course, for those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, but also includes the same or similar methods that can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is limited by the attached claims rather than the above description.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0042] The technical parts not described in detail in the present invention are all known technologies.

Claims

1. An independent demonstration device with a sound focusing function, comprising two sets of reflection components arranged in pairs, the concave surfaces (10) of the two sets of reflection components facing each other, characterized in that: The reflection assembly further comprises an adjustment portion (20) for driving the concave surface (10) to switch between a horizontal state and an elevation state; a sound reflection plate (30) with a horizontally arranged plate surface is arranged above the middle of the two groups of reflection assemblies, so that when the two groups of concave surfaces (10) are both in the elevation state, sound energy is emitted from the concave surface (10) of one group of reflection assemblies and then reflected to the concave surface (10) of the other group of reflection assemblies via the sound reflection plate (30).

2. The independent demonstration device with sound focusing function according to claim 1, characterized in that: The reflective assembly further comprises a base (40) for mounting the concave surface (10); a swing rod (21) extends from the back of the concave surface (10); the middle portion of the swing rod (21) is hinged to the base (40) via a horizontal hinge shaft (22); an operating end of the swing rod (21) is horizontally hinged to one end of a connecting rod (23); the other end of the connecting rod (23) is eccentrically rotatably mounted on a coaxial turntable (24) of a rotating motor (25).

3. An independent demonstration device with sound focusing function according to claim 1 or 2, characterized in that: The sound reflection plate (30) is in the shape of an elliptical disk, and the long axis direction is parallel to the arrangement direction of the two groups of reflection components; the sound reflection plate (30) is suspended on the top installation surface by means of a vertical pull rod (61).

4. The independent demonstration device with sound focusing function according to claim 3, characterized in that: The sound reflection plate (30) is split at the short axis to form a two-lobed structure, and the middle parts of the two-lobed structure are fastened to each other at the short axis by tension bolts; lifting ears are arranged at the two long axis ends of the sound reflection plate (30), one end of the oblique pull rope (62) is fixed at the lifting ear, and the other end is obliquely extended and fixed at the pre-anchor point on the top mounting surface; the pre-anchor point, the oblique pull rope (62) and the lifting ear that match each other form a group of positioning units, the two oblique pull ropes (62) of the two groups of positioning units cross each other, and the positioning units are symmetrically arranged along the short axis of the sound reflection plate (30); in the projection in the top view direction, the oblique pull rope (62) is located on the long axis of the sound reflection plate (30).

5. The independent demonstration device with sound focusing function according to claim 4, characterized in that: A steel frame (50) is arranged on the back of the sound reflection plate (30), and the vertical tension rods (61), the tension bolts and the positioning unit are all installed on the steel frame (50).

6. The independent demonstration device with sound focusing function according to claim 2, characterized in that: The base (40) comprises a horizontal section (41), and an inclined section (42) extending obliquely upward from the end of the horizontal section (41), so that the horizontal section (41) and the inclined section (42) form an angled structure, and the openings of the bases (40) of the two groups of reflective components are opposite to each other; the concave surface (10) is installed at the top of the inclined section (42), and a foothold for participants to stand is arranged on the upper surface of the horizontal section (41).

7. The independent demonstration device with sound focusing function according to claim 6, characterized in that: A Fuma wheel is arranged on the lower plate surface of the horizontal section (41).

8. An independent demonstration device with sound focusing function according to claim 1 or 2, characterized in that: A positioning groove (11) with an opening facing upwards for placing a sound source is installed at the sound focusing point of the concave surface (10).

9. The independent demonstration device with sound focusing function according to claim 8, characterized in that: Three positioning rods (12) are evenly distributed along the axial direction of the concave surface (10), the top ends of the positioning rods (12) are adjacent to each other and connected to each other through a positioning plate (13), a speaker (14) is arranged on the side of the positioning plate (13) facing the concave surface (10), and a play button (15) for turning the speaker on and off is arranged on the side of the positioning plate (13) facing the participant; the positioning groove (11) is installed on the side of the positioning plate (13) facing the concave surface (10), and avoids the installation position of the speaker (14).

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