619 results about "Metallic enclosure" patented technology

The invention relates to the technical field of discharge detection, in particular to a high-precision detection method and device for partial discharge of totally-enclosed GIS equipment. The method comprises the following steps: carrying out metal shell three-dimensional structure modeling on the GIS equipment, and carrying out electromagnetic shielding evaluation so as to obtain a multi-point electromagnetic shielding evaluation value; acquiring an original discharge signal of each sampling point based on the electromagnetic wave sensor, and performing interference suppression processing and back propagation attenuation compensation according to a multi-point electromagnetic shielding evaluation value, so as to obtain an attenuation compensation discharge signal waveform; micro-vibration response parameters are collected based on an MEMS micro-vibration sensor, actual influence waveform point detection marking and physical vibration interference filtering are carried out on attenuation compensation discharge signal waveforms, and therefore pure optimized discharge signal waveforms are obtained. According to the invention, through efficient and accurate partial discharge detection, real-time early warning of the state of the GIS equipment is realized, and the stability and safety of the equipment are improved.

The invention provides a semiconductor module packaging structure and a semiconductor module packaging method. The semiconductor module packaging structure comprises a first substrate, a second substrate and a metal shell, the first substrate comprises a first surface and a second surface which are opposite to each other, the second substrate comprises a third surface and a fourth surface which are opposite to each other, the fourth surface is recessed towards the third surface to form a groove, and the non-recessed part of the fourth surface is electrically connected with the first surface. The structure that the first substrate and the second substrate are directly interconnected replaces a traditional copper column interconnection structure, and the problems that in the prior art, a longitudinally-stacked semiconductor packaging structure is low in reliability, high in parasitic parameter and high in thermal resistance are solved.

The invention discloses a cable GIS terminal stress-strain sensor and a strain monitoring method thereof, and belongs to the technical field of stress-strain monitoring, and the sensor comprises a sensor structure unit which comprises a metal housing, a fixed contact, a movable contact and a piezoelectric element; the signal processing unit is integrated in the integrated circuit shell and comprises a charge collector used for converting a charge signal of the piezoelectric element into an analog voltage signal; the pulse charge discharger is connected to the output end of the charge collector in parallel; the analog-to-digital converter is connected with the output end of the charge collector and is used for converting the analog voltage signal into a digital signal; the serial communication interface is used for outputting digital signals after analog-to-digital conversion; the mounting unit comprises a fixing hole position and an adhesive base which are arranged on the metal shell; the cable GIS terminal stress strain monitoring device is used for monitoring the stress strain of the cable GIS terminal in the operation process so as to reflect typical structure defects appearing in the cable GIS terminal, and online monitoring of the cable GIS terminal equipment is achieved.

The invention relates to the technical field of drilling attitude measurement, in particular to a roadway drilling attitude measuring device and a using method. The provided roadway drilling attitude measuring device comprises a shell, the shell comprises a first shell and a second shell which are connected, the first shell comprises a transparent shell, and the second shell comprises a metal shell; the conical mirror is arranged in the first shell; the camera is arranged in the second shell, and the camera and the conical mirror are oppositely arranged; the data storage and transmission unit is arranged in the second shell, and the data storage and transmission unit is electrically connected with the camera; the measuring unit is arranged in the second shell, and the measuring unit is electrically connected with the data storage and transmission unit. According to the method and the device, the problem that the current drilling attitude measurement is relatively large in error or cannot meet the requirements of rapid feedback and accurate application of data can be solved, and the drilling quality and attitude can be measured in real time and at high precision.

To provide a lighting device capable of excellently radiating heat from a driver while excellently illuminating an object, and a display device equipped with the same.SOLUTION: The lighting device 2 includes a circuit substrate 5 having a front surface on which a plurality of light sources 5a are mounted and a rear surface on which a driver 5b for driving one or more light sources 5a among the plurality of light sources 5a is mounted, a lattice-shaped reflector 6 surrounding each of the plurality of light sources 5a, a metallic case 8 recessed rearward from a top surface 81 and having a recess 82 provided corresponding to the driver 5b, a first heat-conducting T1 in contact with the rear surface of the circuit substrate 5 and the top surface 81, and a second heat-conducting 5b in contact with the driver 82a and a bottom wall of the recess 82. T2. In the circuit substrate 5, a hole 5H through which the internal space Si of the recess 82 and the front space Sf of the circuit substrate 5 communicate with each other is formed at a position covered with the reflector 6.SELECTED DRAWING: Figure 5

The invention discloses a prefabricated branch fireproof cable with a copper metal shell and a preparation method of the prefabricated branch fireproof cable. The prefabricated branch fireproof cable comprises a copper metal main shell, the bottom of the copper metal main shell is communicated with a copper metal sub-shell, a main cable is installed in the copper metal main shell, and a branch cable is installed in the copper metal sub-shell; the main cable and the branch cable both adopt copper core conductors, and copper has high conductivity, so that resistance in a current transmission process can be reduced, electric energy loss can be reduced, electric energy transmission efficiency can be improved, and stable and efficient transmission of electric power to each electric device can be ensured; the nanoscale magnesium oxide insulation powder filled in the copper metal main shell and the copper metal branch shell has excellent insulation performance, can effectively isolate electrical connection between the main cable and the branch cable and the external environment and between the main cable and the branch cable and other conductors, prevents electric leakage and short circuit accidents, and improves the electrical safety of a cable system.

The invention discloses a high-voltage motor pagoda structure direct insulation automatic detection device, which comprises a background system, a pagoda structure detection device and a display device, and is characterized in that the background system is electrically connected with the pagoda structure detection device and the display device; the appearance of the pagoda structure detection device is a pagoda structure, the upper end of the pagoda structure is a high-voltage current-limiting resistor fixedly sealed by a silicone rubber umbrella skirt structure, and the lower end of the pagoda structure is a metal shell. A motor running state input module, a relay output module, a microprocessor, a DC2500 / 5000V boosting module, a high-voltage isolation relay, a current sampling module and an analog-to-digital conversion module are arranged in the metal shell; the motor operation state input module, the relay output module, the microprocessor, the DC2500 / 5000V boost module, the current sampling module, the analog-to-digital conversion module and the high-voltage isolation relay are connected in sequence, and the device can automatically complete insulation resistance detection before the high-voltage motor is put into operation, does not need manual terminal disassembly and assembly, shortens the detection time, and improves the detection accuracy.

An antenna system is configured for use with an electronic device having a housing. The antenna system includes a first antenna element configured to be disposed at a first location adjacent to a side of the housing and a second antenna element configured to be disposed at a second location adjacent to the side of the housing. The first antenna element includes a first body extending between a first lower end and a first upper end. The first body includes a first flat portion, a first arcuate portion, and a first cutout configured to facilitate dual-band radiation associated with the first antenna element. The second antenna element includes a second body extending between a second lower end and a second upper end. The second body includes a second flat portion, a second arcuate portion, and a second cutout configured to facilitate dual-band radiation associated with the second antenna element.

The invention relates to the technical field of online monitoring, in particular to a monitoring data reconstruction method and system for an SF6 sensor, and the method specifically comprises the steps: collecting the mechanical vibration of a preset amplitude generated by a metal housing of SF6 gas insulation equipment; according to the real-time density monitoring signal, a required characteristic frequency band is screened and analyzed; determining a first resonant frequency of the metal shell; setting a rigidity detection mark in the characteristic frequency band according to the first resonant frequency; detecting a frequency shift relation between the rigidity change areas, and determining a rigidity abnormity score of the metal shell; determining a health score of the SF6 gas insulation equipment according to the stiffness anomaly score, the real-time density monitoring signal and the equipment sealing performance monitoring signal; reconstructing the monitoring signal according to the health score to generate correction density data; the problem that in the prior art, monitoring data hidden distortion caused by progressive failure due to sealing ring aging and installation loosening cannot be recognized is solved.

The invention discloses an ultrasonic double-wave detection and monitoring method and an ultrasonic double-wave transducer, and the ultrasonic double-wave transducer comprises a piezoelectric element which is used for exciting a longitudinal wave signal and a transverse wave signal at the same time under the excitation of a single electric pulse; the backing layer is positioned on the back surface of the piezoelectric element and is used for absorbing longitudinal wave energy radiated to the back surface by the piezoelectric element; the matching layer is arranged between the piezoelectric element and the tested workpiece and is used for acoustic impedance matching; the electrical connection device is used for connecting an external excitation generator and receiving equipment; and the metal shell is used for packaging the piezoelectric element, the backing layer, the matching layer and the electrical connection device and is provided with a structure for applying pre-tightening force. According to the invention, dual-mode excitation is realized through a single piezoelectric plate structure, and the efficiency, precision and reliability of dual-wave ultrasonic detection are improved.

The invention discloses a paper folding structure inductance type self-decoupling miniature six-dimensional force sensor, which belongs to the technical field of force sensors and comprises a base, a folding flexible circuit board, a metal shell, a communication cable, a coil inductance measuring circuit and an elastic body. The folding flexible circuit board comprises a coil array and an inductance measuring circuit, the coil array is folded on the upper surface and the four side faces of the base, the inductance measuring circuit is folded at the bottom of the base, and a communication cable is led out of the inductance measuring circuit. The metal shell is arranged above the base and surrounds the surface, except the bottom surface, of the folding flexible circuit board; an elastic body is arranged between the metal shell and the base. The elastomer converts six-dimensional force borne by the metal shell into six-dimensional displacement. According to the sensor, the characteristic that the eddy current effect is sensitive to normal displacement and insensitive to tangential displacement and rotation is utilized, self-decoupling measurement of six-dimensional displacement of the metal shell is achieved in combination with three-dimensional coil layout, and therefore self-decoupling six-dimensional force measurement is achieved, and the sensor can be integrated to the fingertip of the dexterous hand to provide endogenous tactile perception.

The invention discloses a vacuum cup with a metal shell and an inner container directly compounded and a preparation method. The vacuum cup comprises a metal shell, an inorganic non-metal inner container and a transition layer located at openings of the metal shell and the inorganic non-metal inner container. The transition layer is at least one of a metal transition layer, a metal solder transition layer or a glass solder transition layer, the thermal expansion coefficient of the transition layer is between the thermal expansion coefficient of the metal shell and the thermal expansion coefficient of the inner container, and the thermal expansion coefficient meets the metal shell gt; a transition layer gt; an inorganic nonmetal liner; when the transition layer is a metal transition layer, the relative difference K between the transition layer and the thermal expansion coefficient of the metal shell is less than 60%; when the transition layer is a metal solder or glass solder transition layer, K is less than 20%; the total thickness of the transition layer is smaller than 1 mm. By reasonably controlling the material and thermal expansion coefficient of the transition layer, a middle structure with a deformation inhibition function is formed, thermal expansion deformation of the metal shell is relieved, the welding stress is reduced, the cracking risk is reduced, and reliable and direct compounding of the metal shell and the inorganic nonmetal inner container is achieved.

The invention discloses a high-power inverter and a control method thereof, and belongs to the technical field of power electronics, the high-power inverter comprises a sensing enhanced magnetic assembly, the sensing enhanced magnetic assembly comprises a high-thermal-conductivity metal shell, a magnetic core arranged in the high-thermal-conductivity metal shell, a main power coil, a high-precision sensing coil and an integrated thermal probe; wherein the high-precision sensing coil is wound by clinging to a central column of the magnetic core, the main power coil is coaxially wound on the outer side of the high-precision sensing coil, and the magnetic core, the main power coil and the high-precision sensing coil jointly form an inductor core body. According to the invention, the controller can monitor the working point of the magnetic core on the magnetization curve in real time, so that the margin of the magnetic core away from the magnetic saturation state is directly judged.

The invention discloses an optical module printed circuit board and a preparation method thereof. The invention aims to solve the problem of heat dissipation of the optical module under high-speed transmission. The method comprises the specific steps of firstly pressing a multilayer circuit board with a six-layer structure, then drilling a via hole in the circuit board, and then plating a layer of metal copper in the via hole; the via hole comprises a stratum heat dissipation hole and a device mounting hole, and finally, the stratum heat dissipation via hole in a heating device area is filled with copper paste; and forming a circuit pattern on the circuit board filled with the copper paste in the modes of dry film pasting, exposure, development and etching, and the like. According to the invention, a printed circuit board laminated structure is constructed, a heating device is embedded, and heat is conducted to a ground metal shell through an embedded copper block and copper column heat dissipation mode, so that the heat dissipation problem of the optical module under high-speed transmission is solved.

The invention provides an ultra-high-speed bus expansion electric connector with a shielding function, which comprises an insulating body provided with a lengthwise slot, a plurality of terminal slots are respectively arranged in lengthwise side walls on two sides of the slot, and a fool-proof part is arranged in the slot and is used for dividing the insulating body into a power supply and low-speed signal area and a high-speed signal area; the terminals comprise differential signal terminals distributed in the high-speed signal area and other terminals distributed in the high-speed signal area and the power supply and low-speed signal area, every two differential signal terminals are adjacent, and every two adjacent differential signal terminals and an insulating block inserted into the insulating body are formed in an embedded mode; the other terminals are independent terminals which are inserted into the corresponding terminal grooves of the insulating body; the metal shell is coated outside the insulating body, and a wave-absorbing material is arranged between the metal shell and the insulating body; the ultra-high-speed bus expansion electric connector with the shield can enable signal transmission to be better and more stable.

The utility model provides a faucet shell and a mould, the faucet shell comprises a metal outer shell and a plastic inner pipe body, the plastic inner pipe body is arranged in the metal outer shell, and the plastic inner pipe body is in close contact with the inner wall of the metal outer shell; the metal outer shell comprises a first metal outer pipe, one side of the first metal outer pipe is integrally connected with a second metal outer pipe, and the first metal outer pipe is communicated with the second metal outer pipe; the plastic inner pipe body comprises a first plastic inner pipe, one side of the first plastic inner pipe is integrally connected with a second plastic inner pipe, and the first plastic inner pipe is communicated with the second plastic inner pipe. According to the utility model, the overall stability is strong, and the overall texture and attractiveness are high; when water flows in the plastic inner pipe body, the water does not make contact with the metal outer pipe, the metal outer shell cannot be oxidized by the water, microelements cannot be released into the water, and the water pipe is green, environmentally friendly and long in service life. The plastic inner pipe can be prevented from sliding and loosening from the metal outer pipe.

A slot antenna device is disposed on a metal case and includes a slot, a first dielectric substrate, a feeding metal branch, a coupling metal branch, and a signal source. The slot is in the metal case and includes a first long side, a second long side, a first short side and a second short side. The first dielectric substrate is on the metal case adjacent to the first short side of the slot and located above the slot. The feeding metal branch is on the first dielectric substrate and above the slot. A first end of the coupling metal branch is connected to the metal case of the first long side, and a second end of the coupling metal branch extends along the first long side and toward the second short side. The signal source is electrically connected to the feeding metal branch and the metal case.

The utility model discloses a photoelectric detector, which comprises a shell, the shell is divided into an upper cavity and a lower cavity, wire passing holes are arranged among the upper cavity, a separation layer and the lower cavity, a power line passes through the wire passing holes in the upper cavity, a photodiode, a radio frequency output connector and an I / V conversion circuit board are arranged in the upper cavity, and the I / V conversion circuit board is arranged in the lower cavity. A power supply connector and a power supply board are arranged in the lower cavity, the power supply board and the I / V conversion circuit board are designed to be PCBs without wiring or placing components at the bottoms, a metal shell of the photodiode penetrates into the upper cavity to be in direct contact with the upper cavity and is connected with the ground, and one end of the photodiode and one end of the radio frequency output connector penetrate out of the upper cavity but are not located on the adjacent outer wall face of the upper cavity respectively. One end of the power interface connecting line is connected with the power connector, and the other end of the power interface connecting line is connected with the power panel. According to the photoelectric detector, the bandwidth index of the photoelectric detector can be optimized.

The utility model discloses a cooking utensil, and relates to the technical field of household appliances, the cooking utensil comprises a utensil body, a target ground wire in the utensil body is connected to a ground point of a pot body in the utensil body, and the target ground wire at least comprises a first ground wire connected with a metal shell in the utensil body; and the filtering device is arranged on the target ground wire so as to eliminate interference signals brought by a wireless temperature measurement module in the appliance body. According to the cooking utensil, the problem that the EMC effect of the cooking utensil in the related technology is poor is solved.

To provide a partial discharge detection system targeting a power receiving / distributing apparatus.SOLUTION: A partial discharge detection system of a power receiving / distributing apparatus includes: a control device housing a plurality of power devices such as a breaker and a disconnector within a grounded metal case and configured to control / monitor the plurality of power devices; and a partial discharge sensor dependent on an electromagnetic wave. The partial discharge detection system is configured to: measure a voltage of one phase among three phases as a reference phase; calculate the number of times by which an output of the partial discharge sensor dependent on an electromagnetic wave enters a range of a phase angle of a preset voltage; and determine a phase corresponding to a range of a phase angle reaching a prescribed number of times or more as a phase at which a partial discharge is occurring.SELECTED DRAWING: Figure 1

A spark plug (1, 201, 301, 401, 501, 601) comprising: a cylindrical insulator (10, 210, 410, 510) with an axially extending axial hole (20, 220, 520) and a rearwardly directed surface (22A) formed in the axial hole (20, 220, 520); a cylindrical metal casing (30, 330, 630) arranged on an outer periphery of the insulator (10, 210, 410, 510); and a central electrode (50) arranged at a front end in the axial hole (20, 220, 520), wherein the central electrode (50) has a large-diameter section (52) with an outer diameter that is the largest in the central electrode (50), the large-diameter section (52) being held at the rearward-facing surface (22A), and wherein the metal shell (30, 330, 630) has a diameter-enlarged section (36) at a rear end with respect to the central electrode (50),wherein the enlarged diameter section (36) has an inner diameter that is enlarged towards the rear end, wherein the insulator (10, 210, 410, 510) has a first section (70, 270, 470, 570) which is a section of the insulator (10, 210, 410, 510) in a region (AR) from a rear end of the rearward-facing surface (22A) to a front end of the enlarged diameter section (36), the first section (70, 270, 470, 570) having a thickness (X1) which is the greatest in the region (AR), and is arranged at least on an outer periphery of the large-diameter section (52), the insulator (10, 210, 410, 510) being connected to the metal shell (30, 330, 630) by a seal (45) is held at the front face with respect to the first section (70, 270, 470, 570) and the insulator (10, 210, 410, 510) has a second section (80, 280, 480, 580) at the rear end face with respect to the first section (70, 270, 470, 570) in the area (AR),wherein the second section (80, 280, 480, 580) has an outer diameter (B) that is smaller than an outer diameter (A) of the first section (70, 270, 470, 570), wherein the first section (70, 270, 470, 570) is arranged at least at an outer periphery of an entire region in the axial direction of a section of the central electrode (50) that is arranged in the region (AR).

The utility model relates to aerosol generating equipment and an interaction system. The aerosol generating equipment comprises a metal shell, a radio frequency circuit and a signal transmission module, the radio frequency circuit and the signal transmission module are arranged in the metal shell; and the radio frequency circuit is electrically connected with the signal transmission module and is used for outputting a radio frequency signal to the metal shell through the signal transmission module, so that the metal shell serves as an antenna radiator to emit the radio frequency signal. According to the aerosol generating equipment, the radio frequency circuit and the signal transmission module are arranged in the metal shell, and the radio frequency signal output by the radio frequency circuit is output to the metal shell through the signal transmission module, so that the metal shell is directly used as an antenna radiator, a wireless communication function is realized, and the signal transmission module can transmit the radio frequency signal to the metal shell. And the all-metal shell meets the industrial design angle.

1. Name of the designed product: upper cover of metal shell of car subwoofer (K-ZZ10APR / 06). 2. Use of the designed product: for metal protective shell of car subwoofer. 3. Design points of the designed product: combination of shape and pattern. 4. Picture or photo best indicating the design points: perspective view.

This invention discloses an insulating encapsulation structure and connection method for a probe temperature sensor, relating to the field of temperature sensor technology. The insulating connection bracket has an outer insulating and thermally conductive protective layer, and contains insulating adhesive and a temperature-sensing component. The specific implementation is as follows: an insulating layer assembly, a built-in snap-fit ​​structure within the insulating connection bracket, and an eccentric cavity for housing the temperature-sensing component. A thermistor glass body is used as the insulator. In the insulation process, direct contact between the glass body and the inner wall of the bracket reduces one useless insulating layer. The cavity formed by the end of the insulating connection bracket and the insulating layer assembly houses the temperature-sensing component. The cavity contains a clearance structure for the thermistor pins and multiple layers of insulation between the pins and the conductive copper wires. A fluid insulating adhesive is used, and then the insulating connection is cured. Finally, the encapsulation is placed inside a metal shell containing insulating adhesive and cured, thus forming multiple layers of effective insulation and sufficient safe insulation thickness between the thermistor conductive pins and the metal shell.

A solid oxide cell module is proposed, comprising several stacks of solid oxide cells (10), several distribution plates (16, 18, 20) arranged between the stacks of solid oxide cells (10), a metal housing (26) with six boundary walls (30) in which the stacks of solid oxide cells (10) and the distribution plates (16, 18, 20) are arranged one behind the other and clamped, and on which inlets and outlets (48, 50) are formed, as well as an insulating housing (62) surrounding the metal housing (26). To ensure sufficient strength even at high temperatures, it is proposed that a stiffening structure (64) be formed on at least one of the surfaces (66, 68) of the boundary walls (30) of the metal housing (26) on all surfaces that are subject to critical creep stress.

This invention belongs to the field of electronic connector technology, and particularly relates to an electronic connector with antenna function and its anti-interference method, comprising: a metal shell, an insulating body fixedly installed inside the metal shell, a connecting plug on one side of the insulating body, a conductive terminal group on the connecting plug, a PCB board on the other side of the insulating body, a radiating antenna on the PCB board, a buffer plate on the periphery of the connecting plug, and a buffer pad fixedly installed on one side of the buffer plate; a buffer assembly, located inside the metal shell, for buffering the buffer plate; the invention adopts a monopole antenna topology structure, and with the design of no radiator and PCB ground short-circuit pin, it significantly reduces the coupling of USB3.x ground noise to the antenna resonant structure, effectively avoids noise interference in the 2.4-2.5GHz band, significantly improves the stability and consistency of 2.4GHz band wireless communication on different USB3.x hosts, and adapts to complex host environments.

The embodiment of the utility model relates to the technical field of antennas, and particularly discloses a UWB module, which comprises a metal shell and an antenna unit. The metal shell is provided with an inner cavity; the antenna unit is arranged in the inner cavity, the antenna unit is coupled with the metal shell so that the antenna unit can radiate outwards through the metal shell, the antenna unit is provided with a defect gap, and the defect gap is parallel to the inner wall of the opposite part of the metal shell in the direction pointing to the edge from the center of the antenna unit. Through the above mode, the embodiment of the utility model can improve the outward radiation effect when the antenna unit is in the metal shell.

A shielding structure and a manufacturing method thereof. The shielding structure comprises a metal shell, a plastic piece and a conductive circuit; the metal shell has an inner surface and an inner space; the plastic piece is arranged on the inner surface of the metal shell and has a containing space, and the plastic piece is located in the inner space; the conductive circuit is arranged on the plastic piece and located in the containing space; wherein the plastic piece is located between the conductive circuit and the metal shell. The shielding structure and the manufacturing method thereof of the present application arrange the conductive circuit in the inner space of the metal shell through the plastic piece, so that the shielding structure has the functions of shielding and conductive control. Through the arrangement of the conductive circuit, multiple electronic elements can be stacked on the circuit board in the shielding structure, thereby improving the space utilization.

The present application discloses a small appliance detection method, which relates to the technical field of small appliances. A ceramic insulating column extends through the upper and lower surfaces of a metal housing, and a pole is disposed within the ceramic insulating column. A connection harness connected to a PCB control program is disposed at the rear end of the pole. The PCB control program transmits an independent high-frequency pulse signal to the pole via the connection harness. The high-frequency pulse signal generates multiple signal differences upon encountering water, which is set as a first detection method. When the vessel contains water or no water, the ceramic insulating column serves as insulation, and the two poles are connected to the PCB control program via the connection harness, generating multiple conduction signals, which is set as a second detection method. The presence of water in the vessel is determined based on the first and second detection methods. A thermistor is disposed within the metal housing through insulating adhesive, which is used to detect water temperature and control the normal operation of the small appliance. When water is present and the heating plate is heating, scale is generated. The presence of scale is determined by determining whether the resistance change of the two poles reaches a set value at the same temperature.

This application illustrates an electro-static discharge protection structure and an electronic device. One end of a pressure-sensitive elastic component is connected to a metal housing, the other end of the pressure-sensitive elastic component extends in a direction away from the metal housing. A border frame includes a connection part—and a first side edge. A conductive layer is disposed on a side, facing the pressure-sensitive elastic component, of the connection part. The one end of the pressure-sensitive elastic component—is connected to the conductive layer, and the other end of the pressure-sensitive elastic component is connected to the metal housing.