CN107340189B - Infrared explosion-proof bulb detection line - Google Patents
Infrared explosion-proof bulb detection line Download PDFInfo
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- CN107340189B CN107340189B CN201710624856.XA CN201710624856A CN107340189B CN 107340189 B CN107340189 B CN 107340189B CN 201710624856 A CN201710624856 A CN 201710624856A CN 107340189 B CN107340189 B CN 107340189B
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- conveying belt
- rectangular cover
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to an infrared explosion-proof bulb detection line, which comprises a conveying belt and a pressure testing device, wherein sleeve holes for sleeving infrared explosion-proof bulbs are uniformly arranged on the conveying belt at intervals along the conveying direction; the pressure testing device comprises a rectangular cover with a hollowed bottom, the top of the rectangular cover is fixedly connected with a piston rod of the air cylinder, and the position of the air cylinder is fixed; when the piston rod of the air cylinder drives the rectangular cover to move downwards to be abutted against the upper surface of the conveying belt, a rectangular cavity is formed between the rectangular cover and the conveying belt in a sealing manner; the rectangular cover is provided with an air inlet and a pressure gauge for testing the air pressure in the rectangular cover, and the air inlet is connected with an external air supply device through an air inlet pipeline; the position below the conveying belt corresponding to the rectangular cover is provided with a pressure-bearing platform, namely when the air cylinder drives the rectangular cover to abut against the conveying belt, the conveying belt abuts against the pressure-bearing platform, and the top surface of the pressure-bearing platform is provided with a conveying groove which is adapted to the movement of the conductive lamp feet. The structure can realize the pressure test of the infrared explosion-proof bulb, and has the advantages of more convenient test, high efficiency, safety and reliability.
Description
Technical Field
The invention relates to a lamp production line, in particular to an infrared explosion-proof bulb detection line.
Background
An infrared explosion-proof bulb is an infrared lamp, and explosion is mainly caused by the fact that a protective cover shell is additionally arranged outside the bulb, so that safety accidents such as explosion of the bulb caused by temperature, external impact or pressure impact are not easy to happen. The bulb detection line is a production line for detecting the performance and the function of the bulbs and is mainly used for detecting the qualified quality of the bulbs. The existing bulb qualification detection generally relies on manual testing to detect, which is time-consuming and labor-consuming, and has great potential safety hazard to detecting personnel. For this reason, an improvement of the existing bulb inspection line is required.
Disclosure of Invention
In order to overcome the defects, the invention designs an infrared explosion-proof bulb detection line, so that the technical problems of complicated detection, low efficiency and poor safety of the existing lamp are solved. The method is realized by adopting the following technical scheme.
The infrared explosion-proof bulb detection line comprises a conveying belt and a pressure testing device, wherein sleeve holes for sleeving the infrared explosion-proof bulbs are uniformly arranged on the conveying belt at intervals along the conveying direction, and when the infrared explosion-proof bulbs are sleeved in the sleeve holes, conductive lamp pins of the infrared explosion-proof bulbs are positioned below the conveying belt; the pressure testing device comprises a rectangular cover with a hollowed bottom, a piston rod of an air cylinder is fixedly connected to the top of the rectangular cover, the air cylinder is vertically arranged relative to the conveying belt, and the position of the air cylinder is fixed; when the piston rod of the air cylinder drives the rectangular cover to move downwards to be abutted against the upper surface of the conveying belt, a rectangular cavity is formed between the rectangular cover and the conveying belt in a sealing manner; the rectangular cover is provided with an air inlet and a pressure gauge for testing the air pressure in the rectangular cover, and the air inlet is connected with an external air supply device through an air inlet pipeline; and a pressure-bearing platform is arranged below the conveying belt and corresponds to the position of the rectangular cover, namely when the air cylinder drives the rectangular cover to abut against the conveying belt, the conveying belt abuts against the pressure-bearing platform, and the top surface of the pressure-bearing platform is provided with a conveying groove which is adapted to the movement of the conductive lamp feet of the infrared explosion-proof bulb. According to the structure, horizontal conveying of the infrared explosion-proof bulb is achieved through the conveying belt, the rectangular cover is driven to move up and down through the air cylinder, sealing opening and closing between the rectangular cover and the conveying belt are achieved, when the infrared explosion-proof bulb enters the rectangular cover, the rectangular cover is driven by the air cylinder to prop against the conveying belt to form a sealed rectangular cavity, air is supplied to the rectangular cavity through the air supply device for pressurization, specific air pressure is kept for a period of time, the pressure-bearing state of the current infrared explosion-proof bulb can be known according to the change of the pressure gauge, and effective pressure detection is achieved.
In the infrared explosion-proof bulb detection line, a sliding plate which vertically slides along the inner cavity of the rectangular cover is arranged in the rectangular cover, sliding fit is formed between four sides of the sliding plate and four sides of the rectangular cover, the top of the sliding plate is connected with the top of the rectangular cover through a tension spring, a vent hole is formed in the surface of the sliding plate, and the ventilation flow of the vent hole is smaller than the air inlet flow of the air inlet. Through the structure, when the air supply device supplies air into the rectangular cover, the instantaneous air pressure of the upper cavity formed by the sliding plate and the rectangular cover is larger than the air pressure of the lower cavity, so that the sliding plate moves downwards to form a lower pressure on the infrared explosion-proof bulb on the conveying belt, and the sealing between the infrared explosion-proof bulb and the conveying belt is promoted to be reliable; when the air pressure of the upper chamber formed by the sliding plate and the rectangular cover is balanced with the air pressure of the lower chamber, the lower pressure of the sliding plate disappears, and the pressure detection of the infrared explosion-proof bulb is realized.
Further, the sliding plate is a rubber plate. Through this structure, make clamp plate and infrared ray explosion-proof bulb be soft contact, prevent to extrude damaging the bulb.
The infrared explosion-proof bulb detection line comprises a function testing device, wherein the function testing device comprises a fixed cover, a light sensor and/or a temperature sensor, and a power supply assembly positioned below a conveying belt; the fixed cover is positioned above the conveying belt, a test cavity is formed between the fixed cover and the conveying belt, an inlet and an outlet are formed in the test cavity along the conveying direction of the conveying belt, and the light sensor and/or the temperature sensor are/is fixed on the wall surface of the inner side of the fixed cover; the power supply assembly comprises a track groove which is adapted to the movement of the conductive lamp feet below the conveying belt, a positive conductive sheet and a negative conductive sheet are arranged in the track groove along the length direction of the track groove, the positive conductive sheet is positioned at the bottom of the track groove, the negative conductive sheet is positioned at the side surface of the track groove, and when the conductive lamp feet are conveyed along with the conveying belt, the positive electrode of the conductive lamp feet is in contact and conduction with the positive conductive sheet, and the negative electrode of the conductive lamp feet is in contact and conduction with the negative conductive sheet. Through the structure, the performance test of the infrared explosion-proof bulb can be realized, and whether the performance of the infrared explosion-proof bulb is qualified is judged by detecting whether the state of the infrared explosion-proof bulb after being powered on meets the set brightness or temperature requirement.
In the function test device, the positive electrode conductive sheet, the negative electrode conductive sheet and the track groove are fixedly connected through springs, namely, the positive electrode conductive sheet and the negative electrode conductive sheet are elastically connected relative to the track groove. Through the structure, the conductive lamp feet of the infrared explosion-proof lamp bulb are reliably in conductive contact with the positive conductive sheet and the negative conductive sheet, and the safety of testing is improved.
And inclined guide surfaces are formed at the initial ends of the positive electrode conducting strip and the negative electrode conducting strip, which are in contact with the conducting lamp pins. Through the structure, the conductive lamp feet of the infrared explosion-proof lamp can smoothly enter the track groove to reliably contact with the positive conductive sheet and the negative conductive sheet.
And groove positions which are adapted to the elastic deformation of the positive electrode conducting plate and the negative electrode conducting plate are arranged in the track grooves. Through this structure, make anodal conducting strip, negative pole conducting strip elastic deformation comparatively stable.
A pair of light sensors or a pair of temperature sensors or a light sensor and a temperature sensor are arranged on the fixed cover at intervals, a group of power supply components are arranged below each light sensor or temperature sensor, and the two groups of power supply components are arranged at intervals; the fixed cover is provided with an air draft device for guiding the air flow in the fixed cover to the outside corresponding to the interval position. Through setting up multiunit inductor to it is more accurate to be the test result, thereby in time will fix the hot-blast suction in the cover after the detection is accomplished through setting up updraft ventilator, reduce the influence to the testing result.
The infrared explosion-proof bulb detection line further comprises a manipulator for detaching unqualified infrared bulbs from the conveyor belt, and the manipulator is arranged at the rear of the function testing device. Through the structure, unqualified products are removed in time.
In the infrared explosion-proof bulb detection line, the conveying belt is a rubber belt or a sealing ferrule is arranged in a trepanning of the conveying belt.
The invention has simple integral structure, can realize pressure test and performance test of the infrared explosion-proof bulb, has convenient test mode, high efficiency, safety and reliability.
Drawings
Fig. 1 is a simplified overall structure of the present invention.
Fig. 2 is a schematic view of the structure of the conveyor belt of the present invention.
FIG. 3 is a schematic cross-sectional view of the power supply assembly of the present invention.
Fig. 4 is a schematic top plan view of fig. 3.
Fig. 5 is a schematic view of the cross-sectional A-A configuration of fig. 4.
The serial numbers and names in the figures are: 1. the infrared explosion-proof bulb, 101, a conductive lamp foot, 2, a conveyer belt, 201, a sleeve hole, 3, a rectangular cover, 301, a rectangular cavity, 4, a sliding plate, 5, a pressure gauge, 6, a ventilation pipeline, 7, a cylinder, 8, a pressure-bearing platform, 801, a conveying groove, 9, a power supply assembly, 901, a track groove, 902, a positive electrode conductive sheet, 903, a negative electrode conductive sheet, 904, a spring, 905, a groove position, 10, a fixed cover, 11, a light sensor, 12, a temperature sensor, 13, an air draft device, 14 and a manipulator.
Detailed Description
The present invention will now be described with reference to the accompanying drawings.
As shown in fig. 1-5, the infrared explosion-proof bulb detection line comprises a conveying belt 2, a pressure testing device and a function testing device, wherein the conveying belt 2 is a rubber belt, and sleeve holes 201 for sleeving the infrared explosion-proof bulbs 1 are uniformly formed in the conveying belt 2 at intervals along the conveying direction. When the infrared explosion-proof bulb 1 is sleeved on the sleeve hole 201, the conductive lamp feet 101 of the infrared explosion-proof bulb 1 are positioned below the conveying belt 2. The pressure testing device comprises a rectangular cover 3 with a hollowed bottom, wherein the rectangular cover 3 is provided with an air inlet and a pressure gauge 5 for testing the air pressure in the rectangular cover 3, and the air inlet is connected with an external air supply device through an air inlet pipeline. The top of the rectangular cover 3 is fixedly connected with a piston rod of an air cylinder 7, the air cylinder 7 is vertically arranged relative to the conveying belt 2, and the position of the air cylinder 7 is fixed. When the piston rod of the air cylinder 7 drives the rectangular cover 3 to move downwards to be abutted against the upper surface of the conveying belt 2, a rectangular cavity 301 is formed between the rectangular cover 3 and the conveying belt 2 in a sealing mode. A sliding plate 4 vertically sliding along the rectangular cavity 301 is arranged in the rectangular cover 3, the sliding plate 4 is a rubber plate, sliding fit is formed between four sides of the sliding plate 4 and four sides of the rectangular cover 3, the top of the sliding plate 4 is connected with the inner top of the rectangular cover 3 through a tension spring, a vent hole is formed in the surface of the sliding plate 4, the vent hole is connected with an external air supply device through a vent pipeline 6, and the ventilation flow of the vent hole is smaller than the air inlet flow of the air inlet. A pressure-bearing platform 8 is arranged below the conveying belt 2 and corresponds to the position of the rectangular cover 3, namely when the air cylinder 7 drives the rectangular cover 3 to abut against the conveying belt 2, the conveying belt 2 abuts against the pressure-bearing platform 8, and a conveying groove 801 for adapting to the movement of the conductive lamp feet 101 of the infrared explosion-proof bulb 1 is arranged on the top surface of the pressure-bearing platform 8.
The functional test device comprises a fixed cover 10, a light sensor 11 and/or a temperature sensor 12, and a power supply assembly 9 positioned below the conveyor belt 2. The fixed cover 10 is positioned above the conveyer belt 2, a test cavity is formed between the fixed cover and the conveyer belt 2, an inlet and an outlet are formed in the test cavity along the conveying direction of the conveyer belt 2, a pair of light sensors 11 or a pair of temperature sensors 12 or a light sensor 11 and a temperature sensor 12 which are arranged at intervals are fixedly arranged on the inner side wall surface of the fixed cover 10, a group of power supply assemblies 9 are arranged below each light sensor 11 or temperature sensor 12, and the two groups of power supply assemblies 9 are arranged at intervals; the stationary hood 10 is provided with an exhaust means 13 for guiding the air flow in the stationary hood 10 to the outside corresponding to the spaced position. The power supply assembly 9 comprises a track groove 901 which is adapted to the movement of the conductive lamp feet 101 below the conveying belt 2, a positive conductive sheet 902 and a negative conductive sheet 903 are arranged in the track groove 901 along the length direction of the track groove, the positive conductive sheet 902 is positioned at the bottom of the track groove 901, the negative conductive sheet 903 is positioned at the two side surfaces of the track groove 901, and when the conductive lamp feet 101 of the infrared explosion-proof bulb 1 are conveyed along with the conveying belt 2, the positive electrode of the conductive lamp feet are in contact conduction with the positive conductive sheet 902, and the negative electrode of the conductive lamp feet are in contact conduction with the negative conductive sheet 903. The positive electrode conductive sheet 902, the negative electrode conductive sheet 903 and the track groove 901 are connected and fixed by a spring 904, that is, the positive electrode conductive sheet 902 and the negative electrode conductive sheet 903 are elastically connected with respect to the track groove 901. The initial ends of the positive electrode conductive sheet 902 and the negative electrode conductive sheet 903, which are in contact with the conductive pins 101, form inclined guide surfaces. The track groove 901 is internally provided with a groove 905 which is suitable for the elastic deformation of the positive electrode conductive sheet 902 and the negative electrode conductive sheet 903.
The infrared explosion-proof bulb detection line further comprises a manipulator 14 for detaching unqualified infrared bulbs from the conveyor belt 2, and the manipulator 14 is arranged behind the function testing device.
The working method of the infrared explosion-proof bulb detection line comprises the following steps: the infrared explosion-proof bulb 1 is arranged in a sleeve hole 201 corresponding to the conveying belt 2, when the conveying belt 2 drives the infrared explosion-proof bulb 1 to enter the rectangular cover 3, the conveying belt 2 stops conveying, and the air cylinder 7 drives the rectangular cover 3 to move downwards to abut against the conveying belt 2 to form a seal. At this time, the air supply device supplies air into the rectangular cover 3, the sliding plate 4 in the rectangular cover 3 moves downwards to enable the low-intensity infrared explosion-proof bulb 1 until the air supply device stops supplying air, the air pressure in the rectangular cover 3 is stable, the pressure-bearing state of the current infrared explosion-proof bulb 1 can be detected by observing the change of the pressure gauge 5, and the pressure test is realized. After the pressure test is finished, the air cylinder 7 drives the rectangular cover 3 to move upwards to reset, the conveyor belt 2 continues to drive the infrared explosion-proof bulb 1 to enter the function test device, wherein the conductive lamp feet 101 of the infrared explosion-proof bulb 1 enter the track groove 901 of the power supply assembly 9 to be in conductive contact with the corresponding positive conductive sheet 902 and negative conductive sheet 903, so that the power supply is switched on, the automatic lighting of the infrared explosion-proof bulb 1 is realized, and the current temperature and the brightness are detected by means of the temperature sensor 12 or the light sensor 11, so that the performance test of the infrared explosion-proof bulb 1 is realized. After the performance test is finished, the qualified products are continuously conveyed by the conveying belt 2, and the unqualified products are automatically removed by the manipulator 14 behind the functional test device.
Claims (8)
1. The infrared explosion-proof bulb detection line comprises a conveying belt (2), a pressure testing device and a function testing device, and is characterized in that sleeve holes (201) for sleeving the infrared explosion-proof bulbs (1) are uniformly arranged on the conveying belt (2) at intervals along the conveying direction, and when the infrared explosion-proof bulbs (1) are sleeved on the sleeve holes (201), conductive lamp feet (101) of the infrared explosion-proof bulbs (1) are positioned below the conveying belt (2); the pressure testing device comprises a rectangular cover (3) with a hollowed bottom, a piston rod of an air cylinder (7) is fixedly connected to the top of the rectangular cover (3), the air cylinder (7) is vertically arranged relative to the conveying belt (2), and the position of the air cylinder (7) is fixed; when a piston rod of the air cylinder (7) drives the rectangular cover (3) to move downwards to be abutted against the upper surface of the conveying belt (2), a rectangular cavity (301) is formed between the rectangular cover (3) and the conveying belt (2) in a sealing mode; the rectangular cover (3) is provided with an air inlet and a pressure gauge (5) for testing the air pressure in the rectangular cover (3), and the air inlet is connected with an external air supply device through an air inlet pipeline; a pressure-bearing platform (8) is arranged below the conveying belt (2) and corresponds to the rectangular cover (3), namely, when the air cylinder (7) drives the rectangular cover (3) to abut against the conveying belt (2), the conveying belt (2) abuts against the pressure-bearing platform (8), and a conveying groove (801) which is matched with the movement of the conductive lamp feet (101) of the infrared explosion-proof bulb (1) is formed in the top surface of the pressure-bearing platform (8);
a sliding plate (4) which vertically slides along the inner cavity of the rectangular cover (3) is arranged in the rectangular cover (3), sliding fit is formed between four sides of the sliding plate (4) and four sides of the rectangular cover (3), the top of the sliding plate (4) is connected with the inner top of the rectangular cover (3) through a tension spring, a vent hole is formed in the surface of the sliding plate (4), and the ventilation flow of the vent hole is smaller than the air inlet flow of the air inlet;
the function testing device comprises a fixed cover (10), a light sensor (11) and/or a temperature sensor (12), and a power supply assembly (9) positioned below the conveying belt (2); the fixed cover (10) is positioned above the conveying belt (2), a test cavity is formed between the fixed cover and the conveying belt (2), an inlet and an outlet are formed in the test cavity along the conveying direction of the conveying belt (2), and the light sensor (11) and/or the temperature sensor (12) are/is fixed on the wall surface of the inner side of the fixed cover (10); the power supply assembly (9) comprises a track groove (901) which is adapted to the movement of the conductive lamp feet (101) below the conveying belt (2), a positive conductive sheet (902) and a negative conductive sheet (903) are arranged in the track groove (901) along the length direction of the track groove, the positive conductive sheet (902) is located at the bottom of the track groove (901), the negative conductive sheet (903) is located at the side surface of the track groove (901), and when the conductive lamp feet (101) are conveyed along with the conveying belt (2), the positive electrode of the conductive lamp feet is in contact conduction with the positive conductive sheet (902), and the negative electrode of the conductive lamp feet is in contact conduction with the negative conductive sheet (903).
2. The infrared explosion-proof bulb detection line according to claim 1, characterized in that the slide plate (4) is a rubber plate.
3. The infrared explosion-proof bulb detection line according to claim 1, wherein the positive electrode conductive sheet (902), the negative electrode conductive sheet (903) and the track groove (901) are connected and fixed through a spring (904), that is, the positive electrode conductive sheet (902) and the negative electrode conductive sheet (903) are elastically connected with respect to the track groove (901).
4. The infrared explosion-proof bulb detection line according to claim 1, wherein the initial ends of the positive electrode conductive sheet (902) and the negative electrode conductive sheet (903) contacting the conductive lamp pins (101) form inclined guide surfaces.
5. The infrared explosion-proof bulb detection line according to claim 1, wherein a groove (905) adapted to elastic deformation of the positive electrode conductive sheet (902) and the negative electrode conductive sheet (903) is arranged in the track groove (901).
6. The infrared explosion-proof bulb detection line according to claim 1, wherein the fixed cover (10) is provided with a pair of light sensors (11) or a pair of temperature sensors (12) which are arranged at intervals, or one light sensor (11) and one temperature sensor (12), a group of power supply components (9) are arranged below each light sensor (11) or temperature sensor (12), and the two groups of power supply components (9) are arranged at intervals; the fixed cover (10) is provided with an air draft device (13) for guiding the air flow in the fixed cover (10) to the outside corresponding to the interval position.
7. The infrared explosion proof bulb detection line according to claim 1, characterized in that the infrared explosion proof bulb detection line comprises a manipulator (14) for detaching defective infrared bulbs from the conveyor belt (2), the manipulator (14) being arranged behind the function test device.
8. The infrared explosion-proof bulb detection line according to claim 1, wherein the conveying belt (2) is a rubber belt or a sealing ring is arranged in a sleeve hole (201) of the conveying belt (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624856.XA CN107340189B (en) | 2017-07-27 | 2017-07-27 | Infrared explosion-proof bulb detection line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624856.XA CN107340189B (en) | 2017-07-27 | 2017-07-27 | Infrared explosion-proof bulb detection line |
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| CN107340189A CN107340189A (en) | 2017-11-10 |
| CN107340189B true CN107340189B (en) | 2023-08-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339767A (en) * | 2018-02-07 | 2018-07-31 | 佛山市富利来灯饰有限公司 | A kind of lamp cap test device |
| CN108534991B (en) * | 2018-03-09 | 2020-09-18 | 江苏福港光电环保科技有限公司 | Lighting detection device for bulb and using method thereof |
| CN109540649B (en) * | 2018-11-30 | 2020-12-29 | 宁波市弘露电子商务有限公司 | Household bulb compression resistance detection device |
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