阅读说明：本技术 用于振动感测装置的振动组件以及振动感测装置 (Vibration assembly for vibration sensing device and vibration sensing device ) 是由 端木鲁玉 李欣亮 付博 方华斌 于 2019-08-22 设计创作，主要内容包括：本发明公开了一种用于振动感测装置的振动组件,包括：环形支撑部,所述环形支撑部形成中空结构；以及压力产生装置,所述压力产生装置包括：弹性元件,所述弹性元件覆盖在所述环形支撑部的中空位置,所述弹性元件的外边缘与所述环形支撑部连接；和质量元件,所述质量元件包括压力探测装置,所述质量元件被设置在所述连接部上,并能随所述弹性元件一起移动,所述压力探测装置的感测部曝露于所述弹性元件的一侧,并与相对侧隔离。本发明的一个技术效果在于,以压力探测装置作自身的重量提升弹性元件的重量。不需要另外设置质量块,使振动组件的整体结构更加简单。(The invention discloses a vibration assembly for a vibration sensing device, comprising: an annular support portion forming a hollow structure; and a pressure generating device, the pressure generating device comprising: the elastic element covers the hollow position of the annular supporting part, and the outer edge of the elastic element is connected with the annular supporting part; and a mass member including a pressure detecting device, the mass member being disposed on the connection portion and being movable together with the elastic member, a sensing portion of the pressure detecting device being exposed to one side of the elastic member and being isolated from an opposite side. One technical effect of the invention is that the pressure detection device is used as the self weight to lift the weight of the elastic element. The mass block does not need to be additionally arranged, so that the overall structure of the vibration assembly is simpler.)

1. A vibration assembly for a vibration sensing device, characterized by: the method comprises the following steps:

an annular support portion forming a hollow structure; and

a pressure generating device, the pressure generating device comprising:

the elastic element covers the hollow position of the annular supporting part, and the outer edge of the elastic element is connected with the annular supporting part; and

a mass member including a pressure detecting device, the mass member being disposed on the elastic member and being movable together with the elastic member, a sensing portion of the pressure detecting device being exposed to one side of the elastic member and being isolated from an opposite side.

2. The vibratory assembly of claim 1, wherein: the elastic element is an elastic diaphragm or damping glue.

3. The vibratory assembly of claim 1, wherein: the mass element further comprises a substrate, the pressure detection device is fixed on the substrate, and the substrate is attached to the connecting portion.

4. The vibratory assembly of claim 3, wherein: the mass element further comprises a signal amplifier disposed on the substrate, the signal amplifier being connected to the pressure detection device.

5. The vibratory assembly of claim 3 or 4, wherein: the substrate is a PCB.

6. The vibratory assembly of claim 1, wherein: still include bearing structure, bearing structure's one end with quality component is connected, the other end with the inner wall of annular supporting part is connected, elastic element centers on quality component sets up.

7. The vibratory assembly of claim 6, wherein: the pressure detection device is connected with an external circuit through a conductor arranged on the supporting structure.

8. The vibratory assembly of claim 6 or 7, wherein: the annular supporting part is rectangular annular, and the supporting structure is located on the shorter edge of the annular supporting part.

9. A vibration sensing device, characterized by: the vibration component comprises an upper shell, a lower shell and the vibration component as claimed in any one of claims 1 to 8, wherein the upper shell and the lower shell are respectively connected on two opposite sides of the annular supporting part in a sealing mode, a first closed cavity is formed between the upper shell and the mass element, a second closed cavity is formed between the lower shell and the mass element, and a sensing part of the pressure detection device is exposed to the first cavity or the second cavity.

10. The vibration sensing device according to claim 9, wherein: and a welding disc is arranged on the outer surface of the upper shell and/or the lower shell, and the welding disc is connected with the pressure detection device through a conductor arranged in the shell wall.

Technical Field

The present invention relates to the field of vibration sensing technology, and more particularly, to a vibration assembly for a vibration sensing apparatus and a vibration sensing apparatus.

Background

Existing vibration sensing devices typically include a housing and a mass disposed within the housing. The mass is suspended inside the housing by an elastic diaphragm. The housing has an open end. The base plate of the pressure detection device is hermetically connected at the open end. The MEMS chip and the ASIC chip are arranged on one side of the substrate opposite to the shell, and the MEMS chip and the ASIC chip further comprise shells arranged outside the MEMS chip and the ASIC chip. The substrate has a communication hole. The MEMS chip is communicated with the inner cavity of the shell through the communication hole.

In operation, the vibration sensing device is secured to the apparatus to be measured. When the device works, the vibration is transmitted to the shell to drive the shell to produce sound and vibrate. Since the mass has a predetermined mass and the elastic diaphragm has elasticity, the mass vibrates with respect to the housing. The vibration of the mass causes the volume of the chambers on either side of the elastic diaphragm to change. Because the inner cavity is closed, the volume in the cavity can be changed in a sounding mode, and the pressure in the cavity is changed accordingly. The MEMS chip senses the pressure change and generates a corresponding electric signal. The electrical signal is amplified by the ASIC chip and transmitted to an external circuit. The external circuit collects the electrical signal.

However, existing vibration sensing devices typically include independently disposed masses. The mass block and the MEMS chip are positioned in different chambers, and the structure is complex. And the substrate occupies a part of the space, resulting in a large thickness of the vibration sensing apparatus.

Therefore, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

It is an object of the present invention to provide a new solution for a vibration assembly of a vibration sensing device.

According to one aspect of the present invention there is provided a vibration assembly for a vibration sensing device, the vibration assembly comprising:

an annular support portion forming a hollow structure; and

a pressure generating device, the pressure generating device comprising:

the elastic element covers the hollow position of the annular supporting part, and the outer edge of the elastic element is connected with the annular supporting part; and

a mass member including a pressure detecting device, the mass member being disposed on the elastic member and being movable together with the elastic member, a sensing portion of the pressure detecting device being exposed to one side of the elastic member and being isolated from an opposite side.

Optionally, the elastic element is an elastic diaphragm or a damping glue.

Optionally, the mass element further includes a substrate, the pressure detection device is fixed on the substrate, and the substrate is attached to the connection portion.

Optionally, the mass element further comprises a signal amplifier disposed on the substrate, the signal amplifier being connected to the pressure detection device.

Optionally, the substrate is a PCB.

Optionally, the support structure further comprises a support structure, one end of the support structure is connected with the mass element, the other end of the support structure is connected with the inner wall of the annular support portion, and the elastic element is arranged around the mass element.

Optionally, the pressure detection device is connected to an external circuit through a conductor disposed on the support structure.

Optionally, the annular support is rectangular ring-shaped, and the support structure is located on the shorter side of the annular support.

According to another aspect of the present disclosure, a vibration sensing device includes an upper casing, a lower casing, and the vibration assembly of any one of the above, the upper casing and the lower casing are respectively and hermetically connected to two opposite sides of the annular supporting portion, a first sealed chamber is formed between the upper casing and the mass element, a second sealed chamber is formed between the lower casing and the mass element, and a sensing portion of the pressure detection device is exposed to the first sealed chamber or the second sealed chamber.

Optionally, a pad is provided on an outer surface of the upper case and/or the lower case, and the pad is connected to the pressure detecting device through a conductor provided in a wall of the case.

One technical effect of the invention is that the pressure detection device is used as the self weight to lift the weight of the elastic element. And a mass block is not required to be additionally arranged, so that the integral structure of the vibration assembly and the vibration sensing device is simpler.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a vibration assembly according to one embodiment of the present disclosure.

FIG. 2 is a schematic structural diagram of a vibration sensing device according to one embodiment of the present disclosure

FIG. 3 is a schematic structural diagram of another vibration sensing device according to one embodiment of the present disclosure.

Description of reference numerals:

11: an induction film; 12: a substrate; 13: a back cavity; 14: an elastic diaphragm; 15: a first chamber; 16: a second chamber; 17: a substrate; 18: a support structure; 19: a conductor; 20: an ASIC chip; 21: a via hole; 22: a pad; 24: damping glue; 25: an annular support portion; 26 a: an upper shell; 26 b: a lower shell.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to an embodiment of the present disclosure, there is provided a vibration assembly of a vibration sensing device, as shown in fig. 1, including:

an annular support portion 25 and a pressure generating means, the annular support portion 25 forming a hollow structure; the annular support 25 is used to support the vibration assembly. The pressure generating device includes an elastic member and a mass member.

The elastic member covers the hollow position of the annular support portion 25, and the elastic member is used for providing elastic restoring force for the mass member. The outer edge of the elastic element is connected to the annular support 25.

The mass member includes a pressure detecting device, the mass member is disposed on the elastic member and is movable together with the elastic member, and a sensing portion of the pressure detecting device is exposed to one side of the elastic member and is isolated from the opposite side. For example, when the vibration assembly vibrates, the mass member vibrates along with the elastic member. In the vibration process, the pressure detection device is used for sensing vibration information from the side where the pressure detection device is located, and the elastic part provides elastic restoring force so that the vibration assembly can be in a vibration sensing state.

In one example, as shown in fig. 2 and 3, the mass element further includes a substrate 17. The substrate 17 is, for example, a PCB board. The pressure detection means is fixed on the base plate 17. For example, the pressure detecting device is a MEMS chip, which includes a substrate 12 and a sensing membrane 11. The substrate 12 is a hollow structure. The sensing film 11 is a piezoelectric element, a capacitive element, a piezoresistive element, or the like. The sensing film 11 is disposed at one end of the substrate 12 and covers the hollow structure. The hollow structure forms a back cavity 13. The substrate 17 is bonded to the connection portion, and the substrate 17 is directly bonded to the connection portion with an adhesive, for example. The edge portion is connected to the annular support portion 25.

In this example, the substrate 17 and the pressure detecting device themselves have set masses, and the masses themselves can be relied upon as mass elements without providing other mass elements, which makes the structure of the vibration sensing device simpler.

Also, the base plate 17 and the pressure detecting means increase the weight of the mass element, and the amplitude of the mass element is larger under the same vibration, which makes the sensitivity of the vibration sensing means higher. And a mass block is not required to be additionally arranged, so that the components of the vibration sensing device are reduced, the volume of the vibration sensing device is smaller, and more materials can be saved.

In one example, as shown in fig. 2 and 3, the elastic element is an elastic diaphragm 14 or a damping paste 24. Either the elastic diaphragm 14 or the damping gel 24 is connected to the mass element and provides elastic restoring force.

The substrate 17 is directly bonded to the elastic membrane 14 by an adhesive, for example. For example, the damping rubber 24 includes silicon rubber, or the like. The damping rubber 24 has elasticity and can provide elastic restoring force. The damping paste 24 also functions as a bonding means, for example, by bonding the side portion of the base plate 17 and the inner wall of the annular support portion 25 together by the damping paste 24 before curing. Then, the damping paste 24 is cured by heating, UV irradiation, or the like. The cured damping glue 24 gains structural strength and elastic deformability.

Further, using the elastic diaphragm 14 or the damping paste 24 as the elastic element can also make the assembly of the mass element easy.

In one example, the mass element further comprises a signal amplifier disposed on the substrate 17, the signal amplifier being connected to the pressure detection device. For example, as shown in fig. 2 and 3, the signal amplifier is an ASIC chip 20. The ASIC chip 20 is integrated on the substrate 17. The MEMS chip is connected to the ASIC chip 20 through metal wires. The ASIC chip 20 is connected to the substrate 17 through a metal line.

In one example, a support structure 18 is further included, one end of the support structure 18 being connected to the mass element and the other end being connected to the inner wall of the annular support 21, the elastic element being disposed around the mass element. For example, the support structure 18 supports the substrate 17 and the pressure detection device. An elastic diaphragm 14 is arranged around the mass element. For example, the material of the support structure 18 is plastic or metal. The elastic membrane 14 is a film, such as the elastic membrane 14 described above.

In this example, the mass element vibrates about the support structure 18 as a fulcrum. The mass elements have the greatest amplitude from the distal end of the support structure 18 and the least amplitude from the proximal end connected to the support structure 18. The support structure can improve the connection strength of the substrate and the annular support part and the service life of the vibration assembly obviously by 18.

In one example, the pressure sensing device is connected to an external circuit via a conductor 19 disposed on the support structure 18. For example, the support structure 18 is made of a plastic material, and a through hole is formed therein, and the conductor 19 is provided in the through hole. The wires of the pressure detection means are directly connected to the conductor 19; or indirectly through other means to the conductor 19. The conductor 19 is electrically connected to an external circuit through a conductive member provided on the annular support portion.

In one example, as shown in FIG. 1, the annular support 25 is in the form of a rectangular ring, and the support structure 18 is located on the shorter side of the annular support 25.

In this example, the support structure 18 is located on the shorter side of the annular support 25. This arrangement enables a greater amplitude of vibration to be obtained for the vibrating mass element at its furthest end from the support structure, so that the pressure detecting means senses a greater vibration.

According to another embodiment of the present disclosure, as shown in fig. 2 and 3, a vibration sensing device is provided. The sensing device includes an upper housing 26a, a lower housing 26b and the vibrating assembly described above. The upper and lower cases 26a and 26b are sealingly coupled to opposite sides of the annular support portion 25, respectively. A first sealed cavity 15 is formed between the upper shell 26a and the mass element, a second sealed cavity 16 is formed between the lower shell 26b and the mass element, and the sensing part of the pressure detection device is exposed to the first cavity 15 or the second cavity 16. For example, the MEMS chip or the ASIC chip 20 is located on the side of the first chamber 15 or the side of the second chamber 16, and those skilled in the art can set the configuration according to actual needs.

In this example, the entirety of the vibration sensing device includes an upper case 26a, a lower case 26b, and a vibration assembly. In the connection, it is only necessary to connect the upper case 26a and the lower case 26b to both sides of the vibration module. This modular arrangement facilitates assembly of the vibration sensing device. For example, the pads 22 described above are located on the upper case 26a or the lower case 26 b. The upper and lower cases 26a and 26b are bonded to opposite sides of the annular support portion by bonding or solder paste welding. The connection mode and the specific structure of the upper shell 26a and the lower shell 26b can be set by those skilled in the art according to actual needs.

In one example, pads 22 are provided on the outer surface of the upper and/or lower shells 26a, 26b, the pads 22 being connected to the pressure sensing device by conductors provided in the shell walls.

For example, vias 21, i.e., metalized holes, are formed within the sidewalls of the lower shell 26 b. The via 21 has a conductor therein, the pad 22 is connected to the conductor in the via 21, and the via 21 is connected to the conductor 19 in the support structure 18. In use, the pad 22 may be directly soldered to an external circuit.

For example, the sensing film 11 in the vibrating assembly is connected to an amplifier through a metal wire, the amplifier is connected to the substrate 17 through a metal wire, and the substrate 17 is conducted to an external circuit through a conductor 19 on the supporting structure 18.

When the vibration sensing device works, the vibration of an object sensed outside drives the upper shell and the lower shell to vibrate. At this time, the internal elastic member is also vibrating with respect to the upper case 26a and the lower case 26 b. The mass element vibrates along with the elastic element, and the air pressures in the first chamber 15 and the second chamber 16 are changed in a state where the mass element vibrates. The sensing film on the pressure detecting device exposed in the first chamber 15 or the second chamber 16 senses the change of the air pressure, and transmits the change to the signal amplifier through the substrate 12 and the metal wire, and the signal amplified by the signal amplifier is transmitted to the bonding pad 22 through the substrate 17, the conductor 19 and the via hole 21 in sequence, and then is transmitted to an external circuit through the bonding pad 22. Sensing of vibration is achieved.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.