A diaphragm structure, ultrasonic sensor and directional sound-emitting device

Abstract

The present invention relates to the field of sound generation technology, and in particular to a diaphragm structure, an ultrasonic sensor and a directional sound generation device, wherein the diaphragm structure comprises: a main body, the main body is a rotationally symmetrical structure and is horn-shaped, the opening direction of the horn-shaped main body is a first direction, and the main body comprises, along a cross section including its rotation axis, a first arc segment, the first arc segment is located on the main body near the rotation axis, and the first arc segment protrudes toward one end near the opening direction; a second arc segment, the second arc segment is located at one end of the main body away from the rotation axis, and the second arc segment protrudes toward one end away from the opening direction. In the present invention, when the sound wave returns, the first arc segment protrudes toward the opening direction, so the returned sound wave can better deform it, and the deformation is larger, so that the sound wave can be better received, and the intensity of signal transmission and reception is increased. The second arc segment shrinks the edge of the diaphragm, thereby reducing the emission and receiving angles, so that the detection distance is farther.

Description

Technical Field

[0001] The present invention relates to the field of sound generation technology, and in particular to a diaphragm structure, an ultrasonic sensor and a directional sound generation device. Background Art

[0002] Traditional distance measuring sensors are generally ultrasonic sensors, among which ultrasonic distance measuring includes two distance measuring methods. One is open, that is, distance measurement is performed by two sensors, one emitting ultrasonic waves and the other receiving ultrasonic waves; the other is closed, that is, it consists of a single sensor, emitting and receiving ultrasonic waves in one.

[0003] The two open sensors are expensive and have limited installation methods and space. Although the closed sensors are integrated with transmitters and receivers, they have short testing distances and high costs. Therefore, both forms have their shortcomings.

[0004] In view of the existence of the above-mentioned problems, the designer, based on many years of rich practical experience and professional knowledge in the engineering application of such products, and in conjunction with the application of academic theories, actively carried out research and innovation, in order to create a diaphragm structure, ultrasonic sensor and directional sound device to make it more practical.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The present invention provides a diaphragm structure, an ultrasonic sensor and a directional sound-emitting device, thereby effectively solving the problems in the background technology.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a diaphragm structure, an ultrasonic sensor and a directional sound device, comprising:

[0008] The main body is a rotationally symmetrical structure and is horn-shaped, the opening direction of the horn-shaped main body is a first direction, and the main body includes, along a cross section including its rotation axis:

[0009] A first arc segment, the first arc segment is located on the main body near the rotation axis, and the first arc segment protrudes toward one end close to the opening direction;

[0010] The second arc segment is located at an end of the main body away from the rotation axis, and the second arc segment protrudes toward an end away from the opening direction.

[0011] Furthermore, there is a transition section between the first arc segment and the second arc segment, and the transition section is a straight line segment, and two ends of the transition section are tangent to the first arc segment and the second arc segment respectively.

[0012] Furthermore, there is a transition section between the first arc segment and the second arc segment, and the transition section is a curved segment, and both ends are tangent to the first arc segment and the second arc segment respectively, and the radius of the circle where the curved segment is located is at least 10 times the radius R1 of the circle where the first arc segment is located or the radius R2 of the circle where the second arc segment is located.

[0013] Furthermore, the second arc segment is provided with a closing segment at one end away from the rotation axis, the closing segment is arc-shaped, and the radius R3 of the circle where the closing segment is located is smaller than the radius R2 of the circle where the second arc segment is located.

[0014] Furthermore, the angle α between the tangent of the closing section at the farthest point from the rotation axis and the first direction is in the range of 0 to 45°.

[0015] Furthermore, the main body is provided with a plane end at one end away from the first direction, and the plane end is perpendicular to the first direction.

[0016] Furthermore, a damping paper is provided at one end of the main body close to the opening, and the damping paper is in contact with the surface of the main body.

[0017] The present invention also includes an ultrasonic sensor, comprising the diaphragm structure as described above.

[0018] The present invention also includes a directional sound-emitting device, including the diaphragm structure as described above.

[0019] The beneficial effects of the present invention are as follows: the present invention sets a main body, the main body is horn-shaped, wherein the main body includes a first arc segment and a second arc segment, the first arc segment is located on the main body near the rotation axis, the first arc segment protrudes toward one end close to the opening direction, when the sound wave returns, the main body receives the sound wave from the opening, and the first arc segment protrudes toward the opening direction, so the returned sound wave can better deform it, thereby better receiving the sound wave and increasing the intensity of signal sending and receiving. Among them, the arc size of the first arc segment is also related to the sensitivity of sound wave emission and reception. The larger the arc, the higher the sensitivity of emission and reception signals, and it can be flexibly selected according to the actual needs of the product. The second arc segment is located at the end of the main body away from the rotation axis, and the second arc segment protrudes toward the end away from the opening direction. The second arc segment shrinks the edge of the diaphragm, thereby reducing the emission and receiving angles, making the detection distance farther, so that it can not only be used in traditional open sensors to achieve the function of sending and receiving signals with one sensor, which not only saves costs but also has a long detection distance; it can also be used in directional sound-emitting devices with a small sound-emitting angle to achieve directional sound transmission. There is almost no sound beyond the sound-emitting angle, which plays a good role in protecting privacy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is the front view of the diaphragm structure;

[0022] Figure 2 and Figure 3 for Figure 1 Sectional view of AA.

[0023] Figure numerals: 1, first arc segment; 2, second arc segment; 21, closing segment; 3, transition segment; 4, plane end. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figures 1 to 3 Shown: A diaphragm structure, comprising:

[0028] The main body is a rotationally symmetrical structure and is horn-shaped. The opening direction of the horn-shaped main body is a first direction. The main body includes, along a cross section including its rotation axis:

[0029] A first arc segment 1, the first arc segment 1 is located on the main body near the rotation axis, and the first arc segment 1 protrudes toward one end close to the opening direction;

[0030] The second arc segment 2 is located at an end of the main body away from the rotation axis, and the second arc segment 2 protrudes toward an end away from the opening direction.

[0031] By setting the main body, the main body is in the shape of a trumpet, wherein the main body includes a first arc segment 1 and a second arc segment 2, the first arc segment 1 is located on the main body near the rotation axis, and the first arc segment 1 protrudes toward one end close to the opening direction. When the sound wave returns, the main body receives the sound wave from the opening. Since the first arc segment 1 protrudes toward the opening direction, the returned sound wave can better deform it, and the deformation becomes larger, so as to better receive the sound wave and increase the intensity of signal transmission and reception. Among them, the size of the arc of the first arc segment 1 is also related to the sensitivity of sound wave emission and reception. The larger the arc, the higher the sensitivity of emission and reception signals. It can be flexibly selected according to the actual needs of the product.

[0032] The second arc segment 2 is located at the end of the main body away from the rotation axis, and the second arc segment 2 protrudes toward the end away from the opening direction. The second arc segment 2 shrinks the edge of the diaphragm, thereby reducing the emission and receiving angles, making the detection distance farther, so that it can not only be used in traditional open sensors to achieve the function of sending and receiving signals with one sensor, which not only saves costs but also has a long detection distance; it can also be used in directional sound-emitting devices with a small sound-emitting angle to achieve directional sound transmission. There is almost no sound beyond the sound-emitting angle, which plays a good role in protecting privacy.

[0033] In this embodiment, there is a transition section 3 between the first arc segment 1 and the second arc segment 2. The transition section 3 is a straight line segment, and its two ends are tangent to the first arc segment 1 and the second arc segment 2 respectively, thereby realizing the transition between the first arc segment 1 and the second arc segment 2.

[0034] Alternatively, the transition section 3 is a curved section, and its two ends are tangent to the first arc section 1 and the second arc section 2 respectively, and the radius of the circle where the curved section is located is at least 10 times the radius R1 of the circle where the first arc section 1 is located or the radius R2 of the circle where the second arc section 2 is located. By setting the transition section 3 as a curved section, the transition can be smoother, but in order to prevent the curve of the transition section 3 from affecting the emission and reception of sound waves, the radius of the circle where it is located is set to be much larger than the radius of the circle where the first arc section 1 is located or much larger than the radius of the circle where the second arc section 2 is located, so that while the transition is smooth, its curvature is very small.

[0035] In this embodiment, the second arc segment 2 is provided with a closing segment 21 at one end away from the rotation axis. The closing segment 21 is arc-shaped, and the radius R3 of the circle where the closing segment 21 is located is smaller than the radius R2 of the circle where the second arc segment 2 is located.

[0036] By setting the closing section 21, the edge of the diaphragm can be better contracted, and because the radius of the circle where the closing section 21 is located is smaller than the radius of the circle where the second arc section 2 is located, the purpose of faster contraction at the edge of the diaphragm is achieved, so that it can achieve a smaller transmission and receiving angle, and has less impact on the receiving intensity and sensitivity.

[0037] As a preferred embodiment of the above embodiment, the angle α between the tangent of the closing section 21 at the farthest point from the rotation axis and the first direction is in the range of 0 to 45°.

[0038] The smaller the angle between the tangent of the closing section 21 at the farthest distance from the rotation axis and the first direction, the faster it shrinks and the smaller the emission and reception angles of the diaphragm. However, the minimum angle cannot be less than 0°. In order to achieve the closing effect, the maximum angle cannot be greater than 45°.

[0039] In this embodiment, the main body is provided with a plane end 4 at one end away from the first direction, and the plane end 4 is perpendicular to the first direction. By providing the plane end 4, the plane end 4 is perpendicular to the first direction, and when the diaphragm is in use, the plane end 4 fits with a vibration generating device such as a piezoelectric sheet, so that the diaphragm is driven to vibrate, thereby emitting sound waves.

[0040] As a preferred embodiment of the above embodiment, a damping paper is provided at one end of the main body close to the opening, and the damping paper is in contact with the surface of the main body.

[0041] By setting damping paper at one end of the main body opening, the diaphragm can be given a damping effect, thereby reducing the aftershock of the product and increasing the detection sensitivity. On the one hand, when used in an ultrasonic sensor, the blind area of ​​distance detection can be reduced. On the other hand, when used in a directional sound device, there is no need to modulate the frequency, which reduces product costs and ensures the stability of its sound quality.

[0042] This embodiment also includes an ultrasonic sensor, including a diaphragm structure as described above. Except for the diaphragm, the remaining structures of the ultrasonic sensor can use traditional open sensors, but the limitation of needing two sensors is eliminated, and the sending and receiving of sound wave signals are integrated, which has lower costs and avoids the problem of short testing distance of traditional closed sensors.

[0043] This embodiment also includes a directional sound-emitting device, including a diaphragm structure as described above, so that the sound-emitting angle of the directional sound-emitting device is small, and directional sound transmission can be achieved. There is almost no sound beyond the sound-emitting angle, which plays a good role in protecting privacy.

[0044] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A diaphragm structure, characterized in that: include: The main body is a rotationally symmetrical structure and is horn-shaped, the opening direction of the horn-shaped main body is a first direction, and the main body includes, along a cross section including its rotation axis: A first arc segment, the first arc segment is located on the main body near the rotation axis, and the first arc segment protrudes toward one end close to the opening direction; The second arc segment is located at an end of the main body away from the rotation axis, and the second arc segment protrudes toward an end away from the opening direction.

2. The diaphragm structure according to claim 1, characterized in that: A transition segment is between the first arc segment and the second arc segment. The transition segment is a straight line segment, and two ends of the transition segment are tangent to the first arc segment and the second arc segment respectively.

3. The diaphragm structure according to claim 1, characterized in that: There is a transition section between the first arc segment and the second arc segment. The transition section is a curved segment, and its two ends are tangent to the first arc segment and the second arc segment respectively. The radius of the circle where the curved segment is located is at least 10 times the radius R1 of the circle where the first arc segment is located or the radius R2 of the circle where the second arc segment is located.

4. The diaphragm structure according to claim 1, characterized in that: The second arc segment is provided with a closing segment at one end away from the rotation axis. The closing segment is arc-shaped, and the radius R3 of the circle where the closing segment is located is smaller than the radius R2 of the circle where the second arc segment is located.

5. The diaphragm structure according to claim 4, characterized in that: The angle α between the tangent of the closing section at the farthest point from the rotation axis and the first direction is in the range of 0 to 45°.

6. The diaphragm structure according to claim 1, characterized in that: The main body is provided with a plane end at one end away from the first direction, and the plane end is perpendicular to the first direction.

7. The diaphragm structure according to any one of claims 1 to 6, characterized in that: The main body is provided with damping paper at one end close to the opening, and the damping paper is in contact with the surface of the main body.

8. An ultrasonic sensor, characterized in that: Comprising a diaphragm structure as described in any one of claims 1 to 7.

9. A directional sound device, characterized in that: Comprising a diaphragm structure as described in any one of claims 1 to 7.

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