CN113884402A - Resilience detection device of car roof handrail production usefulness - Google Patents
Resilience detection device of car roof handrail production usefulness Download PDFInfo
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- CN113884402A CN113884402A CN202111159241.7A CN202111159241A CN113884402A CN 113884402 A CN113884402 A CN 113884402A CN 202111159241 A CN202111159241 A CN 202111159241A CN 113884402 A CN113884402 A CN 113884402A
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- 238000012360 testing method Methods 0.000 claims description 6
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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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
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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
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- G01N2203/0083—Rebound strike or reflected energy
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Abstract
The invention provides a rebound detection device for production of an automobile roof armrest, which comprises a base, wherein a fixed plate, an SB1 switch button and an SB2 switch button are arranged on the base, an electric control box is installed at the top end of the fixed plate, an armrest positioning frame is installed on one side of the top of the fixed plate, a first air cylinder and a second air cylinder which are symmetrically distributed are respectively installed on the left side and the right side of the armrest positioning frame, a first armrest buckle, a second armrest buckle and an L-shaped support mechanism are installed on one side, far away from the fixed plate, of the armrest positioning frame, the L-shaped support mechanism comprises a first L-shaped support and a second L-shaped support which are perpendicular to each other, a Sc light projector and a Sd light receiving sensor are installed on the first L-shaped support, and a Sa light projector and a Sb light receiving sensor are installed on the second L-shaped support. The cooperation of the mechanical mechanism and the electric control logic judgment circuit in the rebound detection device can quickly detect the rebound time of the handrail, can accurately judge whether the rebound of the handrail is qualified or not, improves the detection efficiency and ensures the quality of products.
Description
Technical Field
The invention relates to the technical field of production and detection of automobile parts, in particular to a rebound detection device for production of an automobile roof handrail.
Background
Automobile roof armrests are common parts in the whole automobile. The production of the handrail involves many aspects of test detection, such as rebound test detection and the like. At present, the handrail resilience detection is to fix the handrail at a simple positioning seat, pull the handrail, and judge whether the product is qualified or not by observing the turning speed of the handrail with naked eyes. The quality of the product detected by the detection method has great deviation, so that the quality is poor and cannot be ensured.
Disclosure of Invention
In order to solve the above technical problems, a first object of the present invention is to provide a springback detection device for producing an automobile roof rail, comprising a base, wherein a fixing plate, an SB1 switch button and an SB2 switch button are arranged on the base, an electrical control box is installed at the top end of the fixing plate, a rail positioning frame is installed at one side of the top of the fixing plate, a first cylinder and a second cylinder are symmetrically installed at the left and right sides of the rail positioning frame, respectively, a first rail fastener, a second rail fastener and an L-shaped support mechanism are installed at one side of the rail positioning frame away from the fixing plate, the first cylinder is in snap fit with the first rail, the second cylinder is in snap fit with the second rail, the L-shaped support mechanism comprises a first L-shaped support and a second L-shaped support which are perpendicular to each other, and a Sc projector and a Sd sensor are installed on the first L-shaped support, and the second L-shaped bracket is provided with a Sa light projector and a Sb light receiving sensor.
Further, the first L-shaped support and the second L-shaped support are both installed on the armrest positioning frame through short plates of the first L-shaped support and long plates of the first L-shaped support are perpendicular to each other, and a Sc light projector and a Sd light receiving sensor are installed on the long plates of the first L-shaped support; and a Sa light projector and a Sb light receiving sensor are mounted on the long plate of the second L-shaped bracket.
Furthermore, a positioning column, a concave position, a first square hole and a second square hole which are matched with the handrail mounting block are arranged on one side, away from the handrail positioning frame, of the first handrail buckle, the positioning column, the first square hole and the second square hole are on the same line, and the first square hole and the second square hole are both located in the concave position; a through hole which is communicated with the first square hole and is used for a positioning core of the first air cylinder to penetrate is formed in the side part of the first handrail buckle; the second handrail buckle and the first handrail buckle are identical in structure.
Furthermore, reinforcing plates are additionally arranged on the front side and the rear side of the fixing plate.
Further, a handle is arranged on the base.
The second objective of the present invention is to provide a method for testing the springback detection device for producing the automobile roof rail, which comprises the following steps:
positioning the handrail: the handrail is installed in the handrail buckle after the power supply is plugged, the power supply indicator lamp is on, the SB1 switch button is pressed, the YV1 electromagnetic valve is electrified, the first air cylinder inserts the positioning core into the first handrail buckle, the second air cylinder inserts the positioning core into the second handrail buckle, and the handrail is positioned; at the moment, the armrest blocks the light source of the Sc projector, the Sd light receiving sensor is switched on, the KA2 normally-closed contact is switched off, the subsequent circuit cannot be switched on, and meanwhile, the KA6 contact is not closed because the armrest is not pulled;
measuring the rebound time: the handrail is pulled to the starting position by hand, the light source of the Sa light projector is shielded by the handrail, the Sb light receiving sensor is conducted, the KA1 and the KA3 are electrified, the KA3 is self-locked, the KA3 contact is completely closed, a starting detection signal is sent, the handrail is released to rebound, and a KT1 timer and a KT2 timer in a subsequent circuit start to time; when the armrest rebounds to the end position, the light source of the Sc light projector is shielded again, the Sd light receiving sensor is switched on, the KA2 is electrified again, the KA2 normally-closed contact is switched off again, the KA3 self-locking is released simultaneously, the KA3 contact is switched off, a signal of the detection completion is sent, and the timing is finished;
and (4) qualified product judgment: the rebound time of the handrail is qualified within the range of 2 seconds < t <4 seconds; in the range of 2 seconds < t <4 seconds, KT1 is electrified, the electrification time exceeds 2 seconds, and the time exceeding 2 seconds is the time for closing the KT1 contact; if the rebound time is 2.4 seconds, the KT1 contact is closed after being delayed for 2 seconds, the closing time is 0.4 second, the subsequent circuit is switched on, and the green light is lightened; meanwhile, the KA7 and KA8 relays are electrified, the KA8 is self-locked, the KA8 normally-closed contact is disconnected, the yellow lamp is not lighted, and the alarm does not sound; in the process of rebounding the handrail, the KT2 is electrified, and because the rebounding time is not more than 4 seconds, and the electrifying time is not enough, the KT2 contact cannot be closed, the red light is not on, the alarm does not sound, and the product is qualified.
When the too fast rebounding time of the handrail is less than 2 seconds, the KT1 and KT2 are electrified but the electrified time is not enough, and the KT1 contact and the KT2 contact do not have the action and the associated circuit to be not conducted; when the handrail rebounds to the right position, the KA1 and the KA6 are conducted, the KA6 is conducted, the KA6 contact is closed, when the handrail rebounds to the right position, the KA2 contact is closed completely, the yellow lamp is turned on, the alarm is sounded, and the situation that the handrail rebounds too fast is prompted.
The rebound time exceeds 4 seconds, KT1 KT2 and KA4 are electrified, the KT2 contact is closed, the KA4 and KA8 normally closed contacts are opened, green flashes off, a red light is on, and an alarm sound is given.
Further, the product taking-out step is included, the SB2 switch button is pressed, the circuit associated with the SB2 is reset and unlocked, the first air cylinder and the second air cylinder are retreated, the product is taken out, and the next product detection can be carried out.
Compared with the prior art, the invention has the advantages that: the resilience detection device for the production of the automobile roof handrail is provided with the handrail buckle and the air cylinder, and the handrail to be detected is accurately positioned and clamped through the matching of the air cylinder and the handrail buckle, so that a foundation is laid for accurate detection; simultaneously, add first L type support and the second L type support that is equipped with mutually perpendicular in the device, and install Sc light projector and Sd photic sensor on the first L type support, install Sa light projector and Sb photic sensor on the second L type support, through angle design and light projector and photic sensor's cooperation, established the basis for the accurate test of handrail rebound time. The cooperation of the mechanical mechanism and the electric control logic judgment circuit in the rebound detection device can quickly detect the rebound time of the handrail, can accurately judge whether the rebound of the handrail is qualified or not, improves the detection efficiency and ensures the quality of products.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a view of a handrail to be inspected according to the present invention;
FIG. 2 is a block diagram of the present invention;
FIG. 3 is a block diagram of the present invention (with armrest);
FIG. 4 is a structural view of the armrest fastener of the present invention;
FIG. 5 is a schematic diagram of the electrical control logic of the present invention.
Wherein: 1. a base; 2. a fixing plate; 3. SB1 switch button; 4. SB2 switch button; 5. a handle; 6. a reinforcing plate; 7. an electrical control box; 8. a handrail positioning frame; 9. a first cylinder; 10. a second cylinder; 11. a first armrest fastener; 12. a second armrest fastener; 13. a first L-shaped bracket; 14. a second L-shaped bracket; 15. a Sc light projector; 16. an Sd light-receiving sensor; 17. sa light projector; 18. a Sb light receiving sensor; 19. a positioning column; 20. a concave position; 21. a first square hole; 22. a second square hole; 23. a through hole; 24. positioning a core; 25. an armrest mounting block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-4, a springback detection device for the production of an automobile roof armrest comprises a base 1, a fixing plate 2, an SB1 switch button 3 and an SB2 switch button are arranged on the base 1, an electrical control box 7 is installed at the top end of the fixing plate 2, an armrest positioning frame 8 is installed at one side of the top of the fixing plate 2, a first air cylinder 9 and a second air cylinder 10 which are symmetrically distributed are respectively installed at the left side and the right side of the armrest positioning frame 8 through air cylinder installation plates, a first armrest buckle 11, a second armrest buckle 12 and an L-shaped support mechanism are installed at one side of the armrest positioning frame 8 far away from the fixing plate 2, the first air cylinder 9 is matched with the first armrest buckle 11, the second air cylinder 10 is matched with the second armrest buckle 12, the L-shaped support mechanism comprises a first L-shaped support 13 and a second L-shaped support 14 which are perpendicular to each other, a Sc light projector 15 and a Sd light sensor 16 are installed on the first L-shaped support 13, the second L-shaped bracket 14 is provided with a Sa light projector 17 and a Sb light receiving sensor 18, both of which are used for detecting the handrail rebound time. The SB1 shift knob 3 and the SB2 shift knob are used for controlling the cylinder to move forward and backward, and are convenient for loading and unloading products. The electric control box 7 is internally provided with a plurality of electric parts to form a related logic circuit for detecting whether the rebound of the handrail is qualified or not. In FIG. 5, E3Z-T60-L is used in combination with E3Z-T61-D, and is a photoelectric combination sensor. When the handrail turns over and begins to end, this photoelectric combined sensor will send out the detection signal. KT1 and KT2 digital display timers, are used for detecting the handrail rebound time. The electromagnetic valve YV1 is used for controlling the cylinder, and indirectly serves as armrest clamping and positioning through the movement of the cylinder. The alarm is used for prompting that the handrail rebounds too fast or too slow. The SB1 switch is pressed to control the cylinder to advance, and the SB2 switch button is used to control the cylinder to retreat and the circuit to reset and unlock.
The handrail to be detected is accurately positioned and clamped through the matching of the air cylinder and the handrail buckle, so that a foundation is laid for accurate detection; simultaneously, add first L type support 13 and the second L type support 14 that is equipped with mutually perpendicular in the device, and install Sc light projector 15 and Sd photic sensor 16 on the first L type support 13, install Sa light projector 17 and Sb photic sensor 18 on the second L type support 14, through angle design and light projector and photic sensor's cooperation, established the basis for the accurate test of handrail resilience time. The electrical control box 7 is provided with a special electrical control logic judgment circuit matched with a mechanical part in the rebound detection device for producing the automobile roof handrail. The cooperation of the mechanical mechanism and the electric control logic judgment circuit in the rebound detection device can quickly detect the rebound time of the handrail, can accurately judge whether the rebound of the handrail is qualified or not, improves the detection efficiency and ensures the quality of products.
The first L-shaped support 13 and the second L-shaped support 14 are both arranged on the handrail positioning frame 8 through short plates of the first L-shaped support and long plates of the first L-shaped support are mutually vertical, and the Sc light projector 15 and the Sd light receiving sensor 16 are arranged on the long plate of the first L-shaped support 13; the long plate of the second L-shaped bracket 14 is mounted with a Sa projector 17 and a Sb light receiving sensor 18.
A positioning column 19, a concave position 20, a first square hole 21 and a second square hole 22 which are matched with the handrail mounting block 25 are arranged on one side, away from the handrail positioning frame 8, of the first handrail buckle 11, the positioning column 19, the first square hole 21 and the second square hole 22 are on the same line, and the first square hole 21 and the second square hole 22 are both positioned in the concave position 20; the side part of the first handrail buckle 11 is provided with a through hole 23 which is communicated with the first square hole 21 and is used for a positioning core 24 of the first air cylinder 9 to penetrate; the positioning core of the cylinder penetrates through the through hole to clamp the handrail mounting block, and the second handrail buckle 12 and the first handrail buckle 11 have the same structure.
Reinforcing plates 6 for reinforcing the fixing plate 2 are additionally arranged at the front side and the rear side of the fixing plate 2. And a handle 5 which is convenient to grasp and move is arranged on the base 1.
The test method of the rebound detection device for the production of the automobile roof armrest comprises the following steps:
positioning the handrail: the handrail is arranged in the handrail buckle after the power supply is plugged, the power supply indicator lamp is turned on, the SB1 switch button 3 is pressed, the YV1 electromagnetic valve is electrified, the first air cylinder 9 inserts the positioning core 24 into the first handrail buckle 11, the second air cylinder 10 inserts the positioning core 24 into the second handrail buckle 12, and the handrail is positioned; at the moment, the handrail blocks the light source of the Sc projector 15, the Sd light receiving sensor 16 is conducted, the KA2 normally-closed contact is disconnected, the subsequent circuit cannot be conducted, the phenomenon of mistaken conduction when a product is installed cannot occur, and meanwhile, the KA6 contact is not closed because the handrail is not pulled, and the phenomenon of mistaken alarm of a yellow light alarm cannot occur when the handrail is installed;
measuring the rebound time: the handrail is pulled to the starting position by hand, the handrail shields the Sa light source, the Sb light receiving sensor 18 is conducted, the KA1 and the KA3 are electrified, the KA3 is self-locked, the KA3 contact is completely closed, a starting detection signal is sent, the handrail is released to rebound, and a KT1 and KT2 timer in a subsequent circuit starts to time; when the armrest rebounds to the end position, the light source of the Sc light projector 15 is shielded again, the Sd light receiving sensor 16 is switched on, the KA2 is powered on again, the KA2 normally-closed contact is switched off again, the KA3 self-locking is released at the same time, the KA3 contact is switched off, a signal of detection completion is sent, and the timing is finished; the handrail bounce time is set in the range of 2 seconds < t <4 seconds.
And (3) judging a timing result: the rebound time of the handrail is moderate. In the range of 2 seconds < t <4 seconds, KT1 is electrified, the electrification time exceeds 2 seconds, and the time exceeding 2 seconds is the time for closing the KT1 contact; if the rebound time is 2.4 seconds, the KT1 contact is closed after being delayed for 2 seconds, the closing time is 0.4 second, the subsequent circuit is switched on, and the green light is lightened; meanwhile, the KA7 and KA8 relays are electrified, the KA8 is self-locked, the KA8 normally-closed contact is disconnected, the yellow lamp is not lighted, and the alarm does not sound; in the process of rebounding the handrail, the KT2 is electrified, and because the rebounding time is not more than 4 seconds, and the electrifying time is not enough, the KT2 contact cannot be closed, the red light is not on, the alarm does not sound, and the product is qualified.
The excessive rebounding time of the handrail is less than 2 seconds, the KT1 and the KT2 are electrified but not for enough time, and the KT1 contact and the KT2 contact cannot be operated to be connected with the associated circuits; because the handrail is pulled out to the starting position, KA1 and KA6 switch on, and KA6 carries on certainly, and KA6 contact is closed, and when the handrail rebounds to the right place, KA2 contact is closed totally, and the amber light is bright and reports that the alarm rings, and suggestion handrail rebounds too fast NG (unqualified).
The handrail rebounds too slowly, and the rebound time exceeds 4 seconds, and KT1 KT2 and KA4 get electric, and KT2 contact is closed, and KA4 and KA8 normally closed contact disconnection, green flash goes out, and the red light is bright, and the alarm sound sends.
The product is taken out, the switch button of SB2 is pressed, the circuit associated with SB2 is reset and unlocked, the first cylinder 9 and the second cylinder 10 are retracted, and the product is taken out. The next product inspection can be performed.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A rebound detection device for the production of an automobile roof armrest comprises a base and is characterized in that, the base is provided with a fixed plate, an SB1 switch button and an SB2 switch button, the top end of the fixed plate is provided with an electric control box, a handrail positioning frame is arranged on one side of the top of the fixed plate, a first air cylinder and a second air cylinder which are symmetrically distributed are respectively arranged on the left side and the right side of the handrail positioning frame, a first handrail buckle, a second handrail buckle and an L-shaped bracket mechanism are arranged on one side of the handrail positioning frame away from the fixed plate, the first cylinder is in snap fit with the first handrail, the second cylinder is in snap fit with the second handrail, the L-shaped support mechanism comprises a first L-shaped support and a second L-shaped support which are perpendicular to each other, a Sc light projector and a Sd light receiving sensor are mounted on the first L-shaped support, and a Sa light projector and a Sb light receiving sensor are mounted on the second L-shaped support.
2. The apparatus according to claim 1, wherein the first L-shaped bracket and the second L-shaped bracket are both mounted on the armrest positioning frame through short plates thereof, and long plates thereof are perpendicular to each other, and the long plate of the first L-shaped bracket is mounted with the Sc light projector and the Sd light sensor; and a Sa light projector and a Sb light receiving sensor are mounted on the long plate of the second L-shaped bracket.
3. The rebound detecting device for the production of the automobile roof armrest according to claim 1, wherein a side of the first armrest buckle away from the armrest positioning frame is provided with a positioning column, a concave position, a first square hole and a second square hole which are matched with the armrest mounting block, the positioning column, the first square hole and the second square hole are on the same line, and the first square hole and the second square hole are all located in the concave position; a through hole which is communicated with the first square hole and is used for a positioning core of the first air cylinder to penetrate is formed in the side part of the first handrail buckle; the second handrail buckle and the first handrail buckle are identical in structure.
4. The apparatus of claim 1, wherein reinforcing plates are added to the front and rear sides of the fixing plate.
5. The apparatus of claim 1, wherein a handle is mounted on the base.
6. The method for testing a rebound detection apparatus for the manufacture of an armrest on a roof of an automobile according to any one of claims 1 to 5, comprising the steps of:
positioning the handrail: the handrail is installed in the handrail buckle after the power supply is plugged, the power supply indicator lamp is on, the SB1 switch button is pressed, the YV1 electromagnetic valve is electrified, the first air cylinder inserts the positioning core into the first handrail buckle, the second air cylinder inserts the positioning core into the second handrail buckle, and the handrail is positioned; at the moment, the armrest blocks the light source of the Sc projector, the Sd light receiving sensor is switched on, the KA2 normally-closed contact is switched off, the subsequent circuit cannot be switched on, and meanwhile, the KA6 contact is not closed because the armrest is not pulled;
measuring the rebound time: the handrail is pulled to the starting position by hand, the light source of the Sa light projector is shielded by the handrail, the Sb light receiving sensor is conducted, the KA1 and the KA3 are electrified, the KA3 is self-locked, the KA3 contact is completely closed, a starting detection signal is sent, the handrail is released to rebound, and a KT1 timer and a KT2 timer in a subsequent circuit start to time; when the armrest rebounds to the end position, the light source of the Sc light projector is shielded again, the Sd light receiving sensor is switched on, the KA2 is electrified again, the KA2 normally-closed contact is switched off again, the KA3 self-locking is released simultaneously, the KA3 contact is switched off, a signal of the detection completion is sent, and the timing is finished;
and (4) qualified product judgment: the rebound time of the handrail is qualified within the range of 2 seconds < t <4 seconds; in the range of 2 seconds < t <4 seconds, KT1 is electrified, the electrification time exceeds 2 seconds, and the time exceeding 2 seconds is the time for closing the KT1 contact; if the rebound time is 2.4 seconds, the KT1 contact is closed after being delayed for 2 seconds, the closing time is 0.4 second, the subsequent circuit is switched on, and the green light is lightened; meanwhile, the KA7 and KA8 relays are electrified, the KA8 is self-locked, the KA8 normally-closed contact is disconnected, the yellow lamp is not lighted, and the alarm does not sound; in the process of rebounding the handrail, the KT2 is electrified, and because the rebounding time is not more than 4 seconds, and the electrifying time is not enough, the KT2 contact cannot be closed, the red light is not on, the alarm does not sound, and the product is qualified.
7. The test method of claim 6, wherein the too fast time of the handrail rebounding is less than 2 seconds, the KT1 and KT2 are energized but not for a sufficient time, and the KT1 contact and KT2 contact do not have any action associated with their associated circuits to be non-conductive; because the handrail is pulled out to the starting position, KA1 and KA6 switch on, and KA6 carries on certainly, and KA6 contact is closed, and when the handrail kick-backs to the right place, KA2 contact is closed totally, and the amber light is bright and reports the siren sound, and the suggestion handrail is rebounded too fast nonconforming.
8. The test method of claim 6, wherein the rebound time exceeds 4 seconds, KT1 KT2 and KA4 are energized, KT2 contact is closed, KA4 and KA8 are normally closed contacts are opened, green flashes off, a red light is on, and an alarm is sounded.
9. The test method according to claim 6, further comprising a product removal step of pushing a switch button of SB2, resetting and unlocking the circuit associated with SB2, and withdrawing the product by retracting the first and second cylinders.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111159241.7A CN113884402A (en) | 2021-09-30 | 2021-09-30 | Resilience detection device of car roof handrail production usefulness |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111159241.7A CN113884402A (en) | 2021-09-30 | 2021-09-30 | Resilience detection device of car roof handrail production usefulness |
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| CN205808696U (en) * | 2016-06-29 | 2016-12-14 | 宁波志胜塑业有限公司 | The damping detection device that auxiliary handle produces in car |
| CN107554376A (en) * | 2017-08-14 | 2018-01-09 | 北京汽车研究总院有限公司 | A kind of offroad vehicle copilot auxiliary rail |
| CN207274507U (en) * | 2017-10-18 | 2018-04-27 | 江苏平安汽车部件有限公司 | A kind of automobile-used handrail with soft pack layer |
| CN207439667U (en) * | 2017-11-15 | 2018-06-01 | 苏州尚实豪精密机械科技有限公司 | Automobile handle durable test device |
| CN207964267U (en) * | 2018-03-14 | 2018-10-12 | 重庆金泰汽车艺术设计有限公司 | A kind of safety handle rebound time detection device |
| CN111494883A (en) * | 2019-12-25 | 2020-08-07 | 陈科明 | Electric treadmill with motor running controlled by armrest switch |
| CN212206564U (en) * | 2020-06-10 | 2020-12-22 | 宁波福尔达智能科技有限公司 | Car handle return time measuring frock |
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