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CN-224205229-U - Directional loudspeaker structure

CN224205229UCN 224205229 UCN224205229 UCN 224205229UCN-224205229-U

Abstract

The utility model relates to the technical field of ultrasonic waves and discloses a directional horn structure, wherein a directional plate is rotationally connected with an external connecting structure, the directional plate comprises at least two directional plates which are arranged side by side, each directional plate comprises an acoustic wave part, the acoustic wave parts are arranged on one side of the directional plate far away from the external connecting structure, the acoustic wave parts are suitable for emitting ultrasonic waves, the acoustic wave direction of the acoustic wave parts is suitable for being perpendicular to the plane of one side of the directional plate far away from the external connecting structure, the ultrasonic waves emitted by the acoustic wave parts of two adjacent directional plates form double-slit interference, and the directional plates are simultaneously connected with the at least two directional plates and are suitable for synchronously driving the at least two directional plates to rotate relative to the external connecting structure. Through the double-slit interference ultrasonic structure, the directional regulation and control of sound waves are realized, at least two directional plates arranged side by side are adopted to form an interference array, the sound wave part of each directional plate can emit ultrasonic waves perpendicular to the plate surface, and the adjacent sound wave sources are ensured to form a stable double-slit interference field.

Inventors

  • LIU TIANMING
  • PAN JUN
  • HUANG CHENG

Assignees

  • 王力安防科技股份有限公司

Dates

Publication Date
20260505
Application Date
20250523

Claims (10)

  1. 1. A directional horn structure, comprising: The pointing board (1) is rotationally connected with an external connection structure, the pointing board (1) comprises at least two pointing boards arranged side by side, each pointing board (1) comprises an acoustic wave part (12), the acoustic wave parts (12) are arranged on one side, far away from the external connection structure, of the pointing board (1), the acoustic wave parts (12) are suitable for emitting ultrasonic waves, the acoustic wave direction of the ultrasonic waves is suitable for being perpendicular to the plane, far away from the external connection structure, of the pointing board (1), and the ultrasonic waves emitted by the acoustic wave parts (12) of two adjacent pointing boards (1) form double-slit interference; The direction adjusting plates (3), the direction adjusting plates (3) are simultaneously connected with at least two direction adjusting plates (1) and are suitable for synchronously driving the at least two direction adjusting plates (1) to rotate relative to the external connection structure.
  2. 2. The directional horn structure according to claim 1, further comprising a connection block (2), wherein two connection blocks (2) are respectively disposed at two ends of the directional board (1) along the length direction, the connection block (2) comprises a connection portion (21), the directional board (1) further comprises a first installation portion (11), and the connection portions (21) are connected with the first installation portions (11) in a one-to-one correspondence.
  3. 3. The directional horn structure according to claim 2, characterized in that the connection block (2) further comprises a connection portion (21) and a second installation portion (22), the connection portion (21) is symmetrically arranged at two ends of the second installation portion (22), and the direction-adjusting plate (3) is connected with the connection portion (21) of the connection block (2) on the side close to the sound wave portion (12) in a matched manner.
  4. 4. A directional horn structure according to claim 3, further comprising a fixing member (4), wherein one side of the fixing member (4) is connected with the connecting portion (21) on the side of the connecting block (2) away from the acoustic wave portion (12), and the other side is fixedly connected with the external connecting structure.
  5. 5. A directional horn structure according to claim 3, characterized in that a locking member (5) is further arranged between the connecting portion (21) of the connecting block (2) near the side of the sound wave portion (12) and the pointing board (1), said locking member (5) being adapted to fixedly lock the first mounting portion (11) and the second mounting portion (22).
  6. 6. The directional horn structure according to claim 1, characterized in that the directional board (1) is configured in a semi-cylindrical shape, and the acoustic wave portion (12) is provided in a tangential plane of the semi-cylinder along the length direction of the directional board (1).
  7. 7. The directional horn structure according to claim 6, wherein the semi-cylindrical radius of the directional plate (1) is set to a preset effective radius, and the distance between adjacent directional plates (1) is L, satisfying that L is 50cm < 60cm.
  8. 8. The directional horn structure according to claim 4, wherein the connection portion (21) is a pin hole structure, and the fixing member (4) is rotatably connected with the connection block (2) through a pin shaft.
  9. 9. A directional horn structure according to claim 3, characterized in that the steering plate (3) is connected to a drive mechanism adapted to drive the steering plate (3) to move in the length direction of the steering plate (3).
  10. 10. A directional horn structure according to claim 5, characterized in that the locking member (5) is a spring, which is sleeved on the second mounting portion (22).

Description

Directional loudspeaker structure Technical Field The utility model relates to the technical field of ultrasonic waves, in particular to a directional loudspeaker structure. Background The entrance door voice system is high-tech security equipment integrating intelligent voice interaction and entrance guard functions, and achieves real-time two-way communication between a user and a visitor through voice recognition, remote opposite-speaking and intelligent control technologies. The system is generally provided with a high-definition camera, a microphone and a loudspeaker, supports the mobile phone APP to remotely check visitor images and conduct voice conversation, and can unlock or link intelligent home unlocking through authorization. The intelligent household intelligent door lock has the functions of face recognition, mobile detection, abnormal alarm and the like, is compatible with intelligent household ecology, can control door locks or other household equipment through voice instructions, is safe and convenient, is suitable for scenes such as families, apartments and offices, and effectively improves in-out management efficiency and living experience. In the related art, a voice system of a door of a home generally adopts the traditional speaker technology, so that the problems of poor sound propagation directivity and wide sound field coverage range exist, and when password setting instruction or message broadcasting is carried out in a public area, non-target persons in the range of 1-2 meters outside the door can clearly receive sound wave signals, so that the risk of privacy information leakage is caused, particularly in a residential scene of high-density living, the defect forms a sharp contradiction with the severe requirement of users on privacy, and the definition and convenience of user operation experience can be directly influenced by the conventional solution of simply reducing the volume. Disclosure of utility model In view of the above, the present utility model provides a directional loudspeaker structure to solve the problem of poor directivity and privacy of a voice system. The utility model provides a directional loudspeaker structure, which comprises: The pointing board is rotationally connected with the external connection structure and comprises at least two pointing boards which are arranged side by side, each of the pointing boards comprises a sound wave part, the sound wave parts are arranged on one side of the pointing board, which is far away from the external connection structure, the sound wave parts are suitable for emitting ultrasonic waves, the sound wave direction of the sound wave parts is suitable for being perpendicular to the plane of one side of the pointing board, which is far away from the external connection structure, and the ultrasonic waves emitted by the sound wave parts of two adjacent pointing boards form double-slit interference; The direction adjusting plate is connected with at least two direction plates at the same time and is suitable for synchronously driving the at least two direction plates to rotate relative to the external connecting structure. The utility model has the beneficial effects that the directional regulation and control of sound waves are realized through the double-slit interference ultrasonic structure, the interference array is formed by adopting at least two directional plates which are arranged side by side, the sound wave part of each directional plate can emit ultrasonic waves perpendicular to the plate surface, and the adjacent sound wave sources are ensured to form a stable double-slit interference field. The steering plate is used as a synchronous driving mechanism, can accurately control all the directional plates to cooperatively rotate, realizes beam steering through mechanical steering, avoids complex circuits and high cost of a traditional acoustic wave system, improves the acoustic wave pointing precision and interference stability, simplifies the mechanical structure of multi-plate synchronous steering, and has higher regulation and control efficiency and practical value in the fields of acoustic detection, directional communication or ultrasonic imaging and the like. In an alternative embodiment, the connecting blocks are respectively arranged at two ends of the pointing board along the length direction, the connecting blocks comprise connecting parts, the pointing board further comprises first mounting parts, and the connecting parts are connected with the first mounting parts in a one-to-one correspondence manner. The double-end fixing structure has the beneficial effects that the independent connecting blocks with the connecting parts are arranged at the two ends of the pointing board and form mating connection with the first mounting part on the board body, so that the rigidity of the pointing board can be effectively enhanced and the vibration deformation can be restrained. The modularized structure can great