TWM588087U - Micro detecting device - Google Patents

Abstract

This case provides a miniature detection device including: a controller having a first wireless communication module; a flying vehicle including: a vehicle body; a processor housed in the vehicle body; A second wireless communication module is housed in the vehicle body and is electrically connected to the processor. The second wireless communication module is for the first wireless communication module to be connected to receive a control signal from the controller. A power driver is disposed on the vehicle body and is electrically connected to the processor to drive the vehicle body; and a detection unit is disposed on the vehicle body and is electrically connected to the processor and the second wireless communication module. And generate a detection signal.

Description

Miniature detection device

This case relates to a miniature detection device, and in particular to a type of vehicle that uses a discharged fluid to generate thrust, thereby driving a flight vehicle with a detection unit.

The current driving devices of mobile vehicles use motors, engines, engines, etc. as driving sources to drive the mobile vehicles. However, in order to achieve the required kinetic energy, these traditional driving devices often require a certain volume to accommodate the interior of the vehicle. Core components, it is difficult to reduce the size of the conventional drive. In this era where technology products are constantly being miniaturized, traditional drive devices have been difficult to apply to today's technology products, especially today's mobile vehicles such as drones, are all miniaturized, highly concealed, and highly mobile. The development of traditional driving devices has been unable to meet the requirements of the current miniature mobile vehicles, making the current unmanned vehicles difficult to miniaturize, easy to be restricted by regions, and difficult to popularize. In addition, the current driving devices will cause disturbances during operation. Human noise is also a problem that the current driving device cannot overcome.

In view of this, it is really necessary to develop a miniaturized mobile vehicle to solve the problems that the current mobile vehicle is easily constrained by the environment and still has noise during operation.

The main purpose of this case is to provide a micro-detection device that transmits fluid through a power driver, and then pushes the flying vehicle through the pressure generated by the discharged fluid, so that the flying vehicle can move smoothly. The detection unit performs a detection action, and finally returns the detection result.

To achieve the above purpose, a more general implementation of the present case is to provide a miniature detection device including: a controller having a first wireless communication module; a flying vehicle including: a vehicle body; a processing A second wireless communication module is housed in the vehicle body and is electrically connected to the processor, and the second wireless communication module is connected to the first wireless communication module To receive a control signal from the controller; a power driver disposed on the vehicle body and electrically connected to the processor to propel the vehicle body; and a detection unit disposed on the vehicle body and electrically connected The processor and the second wireless communication module generate a detection signal.

Some typical embodiments embodying the features and advantages of this case will be described in detail in the description in the subsequent paragraphs. It should be understood that the present case can have various changes in different aspects, all of which do not depart from the scope of the present case, and the descriptions and diagrams therein are essentially for the purpose of illustration, rather than limiting the case.

Please refer to FIG. 1 and FIG. 2A. FIG. 1 is a schematic diagram of a micro detection device of the present case, and FIG. 2A is a block diagram of the detection device of the present case. The present invention provides a micro detection device 100 including a controller 1 and a flying vehicle 2. The controller 1 has an operation area 11 and a first wireless communication module 12. The operation area 11 is electrically connected to the first wireless communication module 12. The user can control the flight vehicle 2 through the operation area 11 of the controller 1. The area 11 generates a control signal from a command input by the user, and sends the control signal through the first wireless communication module 12. The flying vehicle 2 has a vehicle body 21, a processor 22, a second wireless communication module 23, a power driver 24, and a detection unit 25. The processor 22 is housed in the vehicle body 21. The second wireless communication module 23 is accommodated in the carrier body 21 and is electrically connected to the processor 22. The second wireless communication module 23 is connected to the first wireless communication module 12 of the controller 1 to receive the control signal. The control signal is passed to the processor 22. The power driver 24 is disposed on the vehicle body 21 and is electrically connected to the processor 22, so that the processor 22 drives the power driver 24 according to the control signal, and pushes the flying vehicle 2 to start operating according to the control signal. The detection unit 25 is disposed on the vehicle body 21 and is electrically connected to the processor 22 and the second wireless communication module 23. The detection unit 25 generates a detection signal and transmits it to the processor 22 and the second wireless communication module 23.

Please refer to FIG. 2B. FIG. 2B is a block diagram of the power driver in this case. The power driver 24 has a plurality of guide units 241, a plurality of guide channels 242, a plurality of valves 243, and a convergence chamber 244. An area of the diversion units 241 forms a driving area 241A. The diversion channels 242 are connected to the driving area 241A and communicate with the diversion units 241, and are used to transfer the fluid introduced by the diversion units 241. Valves 243 are respectively connected to the diversion channels 242, and then connected to the confluence chamber 244, and the fluid in the confluence chamber 244 and its pressure are regulated by opening or closing the valves 243; the diversions in the driving area 241A The unit 241 draws the fluid and guides them into the guide channels 242, and then uses the valves 243 to regulate the flow rate and pressure of the fluid converging in the confluence chamber 244, and finally discharges the fluid in the confluence chamber 244 to generate a thrust force to push The flying vehicle 2 causes the power driver 24 to push the flying vehicle 2 to move by the thrust generated by the continuous drawing and excluding fluid action.

The controller 1 may be a portable electronic device, such as a smart phone, a tablet computer, a notebook computer, or the like. The portable electronic device is used as the controller 1 to control the displacement of the flying vehicle 2, and the detection signal sent by the detection unit 25 of the flying vehicle 2 via the second wireless communication module 23 is returned to the controller 1 ( Portable electronic device) for users to know.

In addition, the detection unit 25 may be an image detection unit, which is used to transmit the image captured by the flight vehicle 2 during flight movement, and return the image to the controller 1 for the user to observe; or the detection unit 25 can be an infrared detection unit, which can be used to detect the human body or a fire source, etc .; the detection unit 25 can also be an air detection unit, which is used to detect the content of gas and confirm the condition of the air; It can be an optical radar detection unit, which uses light or laser imaging for detection.

Please refer to FIG. 3A and FIG. 3B. FIG. 3A is a schematic diagram of the structure of the diversion unit in the case, and FIG. 3B is a schematic diagram of the structure of the actuator in the case. The flow guiding units 241 include a base 2411, an inlet plate 2412, a resonance plate 2413, a spacer 2414, a moving member 2415, and an outlet 2416, respectively. The base 2411 is provided with an inflow hole 2411a. The inlet plate 2412 is disposed on one side of the base 2411 (the following is not limited), and the inlet plate 2412 has at least a first-rate inlet 2412a, and the inflow port 2412a is in communication with the inflow port 2412a of the base 2411. The resonance plate 2413 is disposed on the other side of the base 2411 (it is not limited to the above) and is spaced apart from the entrance plate 2412. The resonance plate 2413 has a central perforation 2413a, a movable portion 2413b, and a fixed portion 2413c. . The central perforation 2413a is located at the center of the resonance plate 2413 and corresponds perpendicularly to the inflow hole 2411a of the base 2411, and the movable portion 2413b is located at the periphery of the central perforation 2413a and the area corresponding to the inflow port 2412a, so that the movable portion 2413b can be in the inflow hole 2411a The fixed position 2413c is located in the peripheral area of the resonance plate 2413, and is fixed to the base 2411. The spacer 2414 is disposed on the fixing portion 2413c of the resonance plate 2413, and a recess in the central region thereof defines a space 2414a with the resonance plate 2413. The actuating member 2415 is disposed on the spacer 2414 and has a vibrating portion 2415a, an outer frame portion 2415b, a plurality of connecting portions 2415c, a plurality of gaps 2415d, and a piezoelectric member 2415e. The vibrating portion 2415a is located at the center of the actuating member 2415. The connecting portions 2415c are provided between the vibrating portion 2415a and the outer frame portion 2415b. The connecting portions 2415c are elastically supported by the vibrating portion 2415a. The gaps 2415d are formed in the vibrating portion 2415a and the outer frame. A fluid is passed between the portion 2415b and the connection portions 2415c, and the piezoelectric element 2415e is an attached vibration portion 2415a. The exit piece 2416 has a frame plate 2416a and a cover plate 2416b. The frame plate 2416a is stacked on the outer frame portion 2415b of the actuator 2415, and the central recess and the vibration portion 2415a of the actuator 2415 define an exit chamber 2416c. The cover plate 2416b is stacked on the frame plate 2416a and has a first-class outlet 2416d in the center. Among them, the piezoelectric element 2415e starts to deform due to the piezoelectric effect, so the vibration part 2415a of the actuator 2415 attached to it is driven in the exit chamber 2416c. It vibrates up and down with the partition chamber 2414a, thereby changing the volume of the oral cavity 2416c and the partition chamber 2414a to change the internal pressure of the two, thereby generating a pressure gradient, and promoting the fluid to enter through the inflow port 2412a and through the inflow hole 2411a , The central perforation 2413a, the gap 2415d, and finally discharged from the outflow port 2416d to convey the fluid.

Please continue to refer to Figures 3C to 3D. Figures 3C and 3D are schematic diagrams of the operation of the diversion unit in this case. When the piezoelectric element 2415e uses the piezoelectric effect to drive the actuator 2415, please refer to FIG. 3C. The piezoelectric element 2415e leads the vibration part 2415a of the actuator 2415 to move upward, and uses the resonance effect to synchronously drive the resonance plate 2413. The movable portion 2413b is displaced upward. As the vibration portion 2415a moves toward the outlet piece 2416, the volume of the partition chamber 2414a will be greatly increased, and the fluid in the inflow inlet 2412a will be drawn into the partition chamber 2414a. At the same time, as the movable portion 2413b of the resonance plate 2413 moves upward, the The volume in the inflow hole 2411a of the base 2411 is increased, and the fluid added to the inflow hole 2411a starts to be introduced into the compartment 2414a, so that the inflow hole 2411a is also in a negative pressure state, and the diversion is drawn through the inflow hole 2412a of the inlet plate 2412. A large amount of fluid outside the unit 241 enters the inflow hole 2411a. Referring to FIG. 3D again, the piezoelectric element 2415e causes the vibration portion 2415a of the moving member 2415 to be displaced downward, and the movable portion 2413b of the resonance plate 2413 is synchronously displaced downward through the resonance effect. When the vibration portion 2415a is displaced downward, the fluid that starts to squeeze the compartment 2414a flows rapidly to the outlet cavity 2416c, which increases the pressure of the outlet cavity 2416c, and begins to exclude the fluid from the outlet 2416d. At the same time, the fluid in the compartments 2414a and the outlet chamber 2416c is rapidly discharged to the outflow port 2416d, so that the interior of the compartments 2414a and the outlet chamber 2416c is in a negative pressure state, so that the fluid continuously enters from the inflow port 2412a. Repeating the above two steps in this way will enable the fluid to continuously enter from the inflow port 2412a, through the inflow hole 2411a, the central perforation 2413a, the compartment 2414a, the gap 2415d, and the outlet cavity 2416c, and finally be excluded by the outflow port 2416d for transportation fluid.

Please refer to FIG. 4A, which is a schematic diagram of the parallel connection of the diversion units in this case. The current guiding units 241 can be arranged in parallel to form a driving region 241A. In FIG. 4A, two flow guiding units 241 are used for illustration, but it is not limited thereto. When the diversion units 241 are arranged in parallel, adjacent diversion units 241 can share the same base 2411, inlet plate 2412, resonance plate 2413, spacer 2414, actuator 2415, and outlet piece 2416, respectively Relevant structures are completed in different areas of each element. When the base 2411, the inlet plate 2412, the resonance plate 2413, the spacer 2414, the actuator 2415, and the outlet 2416 are stacked, a plurality of parallel flow guide units 241 can be completed.

Please refer to FIG. 4B, which is a schematic diagram of a series of diversion units in this case. The diversion units 241 in this case may be arranged in series to form a driving region 241A. FIG. 4B illustrates two diversion units 241, but it is not limited thereto. When the diversion units 241 are arranged in series, two diversion units 241 are vertically spaced and fixed through a fixed structure 245. A series chamber 2451 is defined between the series of diversion units 241, and the fixed structure 245 A series outlet 2452 is provided, so that the fluid guide unit 241 after the series can guide the fluid to the series chamber 2451, and then concentrate on the series outlet 2452 and discharge together.

Please refer to FIG. 4C, which is a schematic diagram of the series and parallel connection of the diversion units in this case. The diversion units 241 in this case may be arranged in series and parallel to form a driving region 241A. In FIG. 4C, four diversion units 241 are used for illustration, but not limited thereto. The series-parallel method is to first arrange the flow guide units 241 in parallel, and then connect the flow guide units 241 in parallel through the fixed structure 245 in series, so that the flow guide units 241 after the series and parallel can flow the fluid before the series chamber 2451. Concentration, and finally excluded by the serial outlet 2452.

Please refer to FIG. 5A first. FIG. 5A is a schematic structural diagram of a first embodiment of a valve of a power driver of the present invention. The valves 243 in this case each include a channel base 2431, a first channel 2432, a second channel 2433, an actuating plate 2434, a piezoelectric plate 2435, and a closing member 2436. The channel base 2431 has a base surface 2431a, and is recessed on the base surface 2431a to form a valve chamber 2431b. The first channel 2432 is located in the channel base 2431. One end of the first channel 2432 serves as an inlet 2432a for the driving area 241A, and the other end communicates with the valve chamber 2431b. The second channel 2433 is also located in the channel base 2431, and has a communication area 2433a and an outlet area 2433b. The communication area 2433a and the outlet area 2433b are perpendicular to and communicate with each other. The communication area 2433a is located between the outlet area 2433b and the valve chamber 2431b. One end is connected to the outlet area 2433b, and the other end is connected to the valve cavity 2431b, so that the outlet area 2433b is in communication with the valve cavity 2431b. The action piece 2434 is disposed on the base surface 2431a and covers the valve chamber 2431b. The action piece 2434 has a first action surface 2434a and a second action surface 2434b. The piezoelectric sheet 2435 is attached to the first actuating surface 2434a of the actuating sheet 2434. The closing member 2436 has a blocking portion 2436a and a connecting rod 2436b. The connecting rod 2436b passes through the communication area 2433a of the second channel 2433, one end of which is connected to the blocking portion 2436a, and the other end is connected to the second operating surface 2434b of the moving plate 2434; The cross-sectional area of the blocking portion 2436a is larger than the cross-sectional area of the communication area 2433a of the second channel 2433, and the length of the connecting rod 2436b is greater than the length of the communication area 2433a of the second channel 2433.

As mentioned above, when the piezoelectric sheet 2435 has not been actuated, the valve 243 is in an open state (as shown in FIG. 5A). Because the length of the connecting rod 2436b is greater than the sum of the length of the communication zone 2433a and the depth of the valve chamber 2431b, it is regarded as a moving sheet When 2434 is horizontal, the blocking portion 2436a will not close the position where the communication area 2433a and the outlet area 2433b in the second channel 2433 are connected, so that the communication area 2433a and the outlet area 2433b communicate with each other, and the fluid can flow into the first channel 2432. The port 2432a enters, flows into the valve chamber 2431b, and finally flows out through the communication region 2433a and the outlet region 2433b. Please refer to FIG. 5B again. FIG. 5B is a closed schematic diagram of the valve of the power driver in this case. When the piezoelectric piece 2435 is deformed and the stress piece drives the moving piece 2434 to bend away from the channel base 2431, at the same time, the connecting rod 2436b of the closure member 2436 is pulled up, so that the blocking portion 2436a of the closure member 2436 abuts against the second channel 2433. Where the middle communication area 2433a and the outlet area 2433b are connected, the communication area 2433a is closed to close the valve 243, and the opening or closing of the valve is controlled by the piezoelectric sheet 2435 to further control the flow and pressure of the fluid flowing into the convergence chamber 244 .

Please refer to FIG. 6A, which is a schematic structural diagram of a second embodiment of a valve of a power driver in this case. Its structure is roughly the same as the previous embodiment, so it will not be described in detail. The difference is that the length of the connecting rod 2436b in this embodiment is equal to the sum of the length of the communication zone 2433a and the depth of the valve chamber 2431b. The blocking portion 2436a is closely connected to the communication area 2433a and the outlet area 2433b, which blocks the communication area 2433a from the outlet area 2433b. The fluid cannot pass through and the valve 243 is in a closed state. Therefore, the valve 243 in this embodiment is normally closed. status. Referring again to FIG. 6B, when the piezoelectric sheet 2435 is deformed and the stress sheet is moved to move the sheet 2434 toward the channel base 2431, the connecting rod 2436b of the closure member 2436 is pushed at the same time, so that the blocking portion 2436a of the closure member 2436 leaves the first The position where the communication area 2433a and the outlet area 2433b in the two passages 2433 are connected, so that the communication area 2433a communicates with the outlet area 2433b, so that the valve 243 is opened. This embodiment is similar to the first embodiment in that the piezoelectric sheet 2435 is used to control the opening or closing of the valve 243 to further control the flow rate and pressure of the fluid flowing into the confluence chamber 244.

To sum up, this case provides a micro-detection device that utilizes a power driver composed of multiple diversion units with diversion channels, valves, and a confluence chamber, and uses the thrust generated by the transmission fluid to propel the flying vehicle to make the flight The vehicle can be moved by thrust, and the relevant detection signal is provided through the detection unit set on the flying vehicle, and it is transmitted back to the user-side controller. The power driver of the deflection unit can reduce the volume, The weight reduction is more favorable for the flying vehicle, and it has great industrial use value.

This case may be modified by anyone who is familiar with this technology, but it is not inferior to those who want to protect the scope of the patent application.

100‧‧‧ miniature detection device

1‧‧‧controller

11‧‧‧operation area

12‧‧‧The first wireless communication module

2‧‧‧ flight vehicle

21‧‧‧ vehicle body

22‧‧‧Processor

23‧‧‧Second wireless communication module

24‧‧‧ Power Drive

241‧‧‧Diversion unit

2411‧‧‧Base

2411a‧‧‧Inflow hole

2412‧‧‧Inlet board

2412a‧‧‧Inlet

2413‧‧‧Resonant plate

2413a‧‧‧center perforation

2413b‧‧‧Moving unit

2413c‧‧‧Fixed section

2414‧‧‧ spacer

2414a‧‧‧ compartment

2415‧‧‧Actuator

2415a‧‧‧Vibration section

2415b‧‧‧Outer frame

2415c‧‧‧Connection Department

2415d‧‧‧Gap

2415e‧‧‧piezo

2416‧‧‧Exports

2416a‧‧‧frame board

2416b‧‧‧ Cover

2416c ‧‧‧ Outlet Room

2416d‧‧‧ Outlet

241A‧‧‧Drive Zone

242‧‧‧Diversion channel

243‧‧‧ Valve

2431‧‧‧Aisle base

2431a‧‧‧Base surface

2431b‧‧‧valve chamber

2432‧‧‧First channel

2432a‧‧‧Inlet

2433‧‧‧Second Channel

2433a‧‧‧ Connected Area

2433b‧‧‧Exit Zone

2434‧‧‧ Action film

2434a‧‧‧First actuation surface

2434b‧‧‧Second actuation surface

2435‧‧‧Piezoelectric sheet

2436‧‧‧ Closure

2436a‧‧‧ Block

2436b‧‧‧ connecting rod

244‧‧‧Confluence chamber

245‧‧‧Fixed structure

2451‧‧‧ Tandem Chamber

2452‧‧‧ Tandem Exit

25‧‧‧ Detection Unit

Figure 1 is a schematic diagram of the miniature detection device of this case.
FIG. 2A is a block diagram of the detection device of the present case.
FIG. 2B is a block diagram of the power driver of the present invention.
FIG. 3A is a schematic structural diagram of a diversion unit in this case.
FIG. 3B is a schematic structural diagram of an actuator in this case.
Figures 3C and 3D are schematic diagrams of the operation of the diversion unit in this case.
Figure 4A is a schematic diagram of the parallel connection of the diversion units in this case.
Figure 4B is a schematic diagram of the series of diversion units in this case.
FIG. 4C is a schematic diagram of series and parallel diversion units.
FIG. 5A is a schematic structural diagram of a first embodiment of a valve of a power driver of the present invention.
FIG. 5B is a schematic diagram of the operation of the first embodiment of the valve of the power driver of the present invention.
FIG. 6A is a schematic structural diagram of a second embodiment of a valve of a power driver of the present invention.
FIG. 6B is a schematic diagram of the operation of the second embodiment of the valve of the power driver of the present invention.

Claims (12)

A miniature detection device includes:
A controller having a first wireless communication module;
A flying vehicle containing:
A vehicle body;
A processor housed in the vehicle body;
A second wireless communication module is housed in the vehicle body and is electrically connected to the processor; the second wireless communication module is for the first wireless communication module to connect to receive a control signal from the controller;
A power driver is disposed on the vehicle body and is electrically connected to the processor to drive the vehicle body; and a detection unit is disposed on the vehicle body and is electrically connected to the processor and the second wireless communication module. Group and generate a detection signal. The micro-detection device according to item 1 of the scope of patent application, wherein the power driver has:
A plurality of diversion units, and a region of the diversion units forms a driving area;
A plurality of diversion channels connected to the diversion units;
A plurality of valves respectively connected to the diversion channels; and a confluence chamber connected to the valves;
Wherein, the diversion units draw fluid into the diversion channels, and use the valves to control the fluid that the diversion channels converge in the confluence chamber, so that the power driver continuously draws fluid and then removes the fluid. Move the vehicle. The micro-detection device according to item 2 of the patent application scope, wherein the controller is a portable electronic device. The micro detecting device according to item 3 of the patent application scope, wherein the portable electronic device is one of a smart phone, a tablet computer, and a notebook computer. The micro-detection device according to item 2 of the scope of patent application, wherein the diversion units are arranged in the driving area in a series arrangement. The micro-detection device according to item 2 of the scope of patent application, wherein the diversion units are arranged in parallel in the driving area. The micro-detection device according to item 2 of the scope of patent application, wherein the flow guiding units are arranged in the driving area in a series-parallel arrangement. The micro-detection device according to item 2 of the patent application scope, wherein the detection unit is an image detection unit. The micro-detection device according to item 2 of the patent application scope, wherein the detection unit is an infrared detection unit. The micro-detection device according to item 2 of the patent application scope, wherein the detection unit is an air detection device. The micro-detection device according to item 2 of the scope of patent application, wherein each of the diversion units includes:
A base with an inflow hole;
An inlet plate disposed on the base, the inlet plate having at least a first inlet, the at least first inlet being in communication with the inflow hole;
A resonance plate is disposed on the base and is opposite to the entrance plate. The resonance plate has a central perforation, a movable portion and a fixed portion. The central perforation is located at the center of the resonance plate, and is connected with the base of the base. The inflow hole corresponds vertically. The movable portion is the peripheral edge of the central perforation and the area corresponding to the inflow hole, so that the movable portion can vibrate up and down at the position of the inflow hole. The fixed portion is the periphery of the resonance plate. The fixing portion is disposed on the base;
A spacer is disposed on the fixed part of the resonance plate, a central recess of the spacer and the resonance plate define a space cavity;
An actuator is disposed on the spacer. The actuator has a vibrating portion, an outer frame portion, a plurality of connecting portions, a plurality of gaps, and a piezoelectric member. The vibrating portion is disposed in the center of the actuator and communicates with the actuator. The compartments correspond vertically, the connection portions are disposed between the vibration portion and the outer frame portion, connect the two and elastically support the vibration portion, and the gaps are formed in the vibration portion, the outer frame portion and the Between the connecting parts, a fluid is passed, the piezoelectric member is attached to the vibrating part; and an outlet member having a frame plate and a cover plate, the frame plate is stacked on the outer frame portion of the actuator, And the central recess and the vibrating part of the actuating member define an exit chamber, the cover plate is stacked on the frame plate, and the center has a first-class exit;
Wherein, the piezoelectric element is deformed due to the piezoelectric effect, which further drives the vibrating part of the actuator to vibrate up and down in the exit chamber and the compartment, thereby changing the volume of the exit chamber and the compartment. The internal pressure is changed to generate a pressure difference, and the fluid is allowed to enter through the inflow port, through the inflow hole, the central perforation, the gaps, the outlet chamber, and finally discharged from the outflow port to transfer the fluid. The micro-detection device according to item 2 of the patent application scope, wherein the valves each include:
A channel base with a base surface, the channel base being recessed on the base surface to form a valve cavity;
A first channel formed in the channel base and communicating with the valve chamber;
A second channel formed in the channel base and having a communication area and an outlet area, the communication area being located between the outlet area and the valve chamber so that the outlet area communicates with the valve chamber;
An actuating blade is disposed on the surface of the base and covers the valve cavity. The actuating blade has a first actuating surface and a second actuating surface;
A piezoelectric piece attached to the first actuating surface; and a closure member having a blocking portion and a connecting rod, the blocking portion being located in the exit area of the second channel and corresponding to the communication area, the connecting rod One end of the connecting rod is connected to the blocking part, and the other end is connected to the second moving surface of the moving piece;
The cross-sectional area of the blocking portion is larger than the cross-sectional area of the communication area, and the length of the connecting rod is greater than the length of the communication area.