CN216669277U - Testing device for simulating extrusion stress of head of passenger - Google Patents
Testing device for simulating extrusion stress of head of passenger Download PDFInfo
- Publication number
- CN216669277U CN216669277U CN202123255343.7U CN202123255343U CN216669277U CN 216669277 U CN216669277 U CN 216669277U CN 202123255343 U CN202123255343 U CN 202123255343U CN 216669277 U CN216669277 U CN 216669277U
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 238000001125 extrusion Methods 0.000 title claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012669 compression test Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 208000010727 head pressing Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
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Abstract
The utility model relates to a testing device for simulating the extrusion stress of the head of a passenger. The testing device for simulating the head extrusion stress of the passenger comprises an adjustable base, a base plate and a testing device, wherein the adjustable base comprises a base plate arranged in the horizontal direction, and the base plate can move and be fixed in the X direction or the Y direction; the electric telescopic module is arranged on the base plate and comprises a telescopic rod arranged in the vertical direction; the angle adjusting unit comprises a ball socket supporting seat, a ball head and a ball socket; the head type assembly comprises a head type body and a sensor assembly arranged on the head type body, and the sensor assembly is fixedly arranged at the top of the ball hole. The utility model provides a testing device for simulating the head extrusion stress of a passenger, which has a compact structure, is convenient to operate and is not easy to damage.
Description
Technical Field
The utility model relates to the technical field of vehicle testing, in particular to a testing device for simulating the extrusion stress of the head of a passenger.
Background
Along with the improvement of the living standard of people, the automobile brings great convenience to the traveling of people, and at present, in the process of processing the automobile, a dummy is often needed to be used for simulating a passenger head extrusion stress test. However, the compression test is not performed only once, but performed many times, and therefore, the head position of the dummy needs to be adjusted to keep consistent during each test, so that the test is convenient, however, manual adjustment is difficult to ensure that the head postures are consistent during each test, so that the test effect is not good enough, and each adjustment is time-consuming and labor-consuming.
In addition, when the head is pressed too much, the dummy is damaged and needs to be replaced again. For this reason, a testing device for protecting the head structure by adjusting the position of the head when the pressure of the head pressing is excessive is required.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a testing device for simulating the extrusion stress of the head of a passenger, which has the advantages of compact structure, convenience in operation and difficulty in damage.
In particular, the utility model provides a testing device for simulating the head extrusion stress of a passenger, which comprises,
an adjustable base including a substrate disposed in a horizontal direction, the substrate being movable in an X direction or a Y direction and being fixed;
the electric telescopic module is arranged on the base plate and comprises a telescopic rod arranged in the vertical direction;
the angle adjusting unit comprises a ball cavity supporting seat, a ball head and a ball cavity, the ball cavity supporting seat is of a hollow structure, the top of the ball cavity supporting seat is provided with a groove, the bottom of the ball cavity is provided with a groove, the bottom of the ball head downwards penetrates through the center of the ball cavity supporting seat, the bottom of the ball head is fixed to the top of the telescopic rod, the bottom of the ball cavity is matched and fixed with the top of the ball cavity supporting seat, the ball cavity can rotate relative to the ball cavity supporting seat, and the groove of the ball cavity is matched with the groove of the ball cavity supporting seat to form an accommodating space which is in rotating fit with the top of the ball head;
the head type assembly comprises a head type body and a sensor assembly arranged on the head type body, and the sensor assembly is fixedly arranged at the top of the ball hole.
According to one embodiment of the utility model, the sensor assembly comprises an upper sensor seat, a triaxial force sensor and a lower sensor seat, the triaxial force sensor is arranged on the lower sensor seat, the triaxial sensor is fixed on the top of the ball hole through the lower sensor seat, and the triaxial force sensor is fixed in the head type body through the upper sensor seat.
According to one embodiment of the utility model, the triaxial force sensor is fixedly arranged at the centre of mass of the head-form body.
According to one embodiment of the utility model, a laser is provided on the head form body for positioning the head form assembly.
According to an embodiment of the present invention, the testing apparatus further includes a positioning pin, a plurality of mounting holes are radially formed in the socket support, the top of the ball head can rotate within a set angle in the accommodating space to keep the top of the socket horizontal, and the positioning pin is matched with the mounting holes to fix the ball head on the socket support.
According to one embodiment of the utility model, the electric telescopic module comprises an electric cylinder arranged on the base plate, and the electric cylinder is used for controlling the lifting of the telescopic rod.
According to one embodiment of the utility model, a guide sleeve in the vertical direction is arranged on the periphery of the top of the electric cylinder, a guide post seat in the horizontal direction is arranged on the top of the telescopic rod, a guide post in the vertical direction is arranged on the periphery of the guide post seat, the guide post penetrates into the guide sleeve downwards, and the telescopic rod can drive the guide post seat to move up and down and drive the guide post to move up and down in the guide sleeve.
According to an embodiment of the present invention, the electric telescopic module further includes a controller disposed on the base plate, the controller receives a force signal transmitted by the sensor assembly, and the controller controls the telescopic rod to descend according to the force signal.
According to an embodiment of the utility model, the testing device further comprises a reinforcing brace fixed with the base plate and the outer wall of the electric cylinder, and the reinforcing brace is used for reinforcing the electric cylinder.
According to one embodiment of the utility model, the adjustable base further comprises a bottom plate and an intermediate plate, the intermediate plate is arranged between the base plate and the bottom plate, a guide rail and a first screw rod are arranged on the bottom plate along the X-axis direction, the bottom of the intermediate plate is matched with the guide rail on the bottom plate and is matched with the first screw rod, and the first screw rod is rotated to enable the intermediate plate to move along the X-axis direction; the top of the middle plate is provided with a guide rail and a second screw rod along the Y-axis direction, the bottom of the base plate is matched with the guide rail on the middle plate and the second screw rod, and the second screw rod is rotated to enable the base plate to move along the Y-axis direction.
The testing device for simulating the head extrusion stress of the passenger provided by the utility model has a compact integral structure, adopts the telescopic rod to support the head type assembly, is convenient to operate and is not easy to damage.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the utility model as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principle of the utility model. In the drawings:
fig. 1 is a schematic structural diagram of a test device for simulating the head squeezing force of an occupant according to an embodiment of the present invention.
FIG. 2 shows a cross-sectional view of a test device for simulating head crush force of an occupant in accordance with an embodiment of the present invention.
FIG. 3 is a perspective view of a test device for simulating head crush force of an occupant according to an embodiment of the present invention.
FIG. 4 shows a front view of an adjustable base of a testing device according to one embodiment of the present invention.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a perspective view of fig. 4.
Wherein the figures include the following reference numerals:
Electric telescopic module 102
Ball hole support seat 107
Sensor upper seat 111
Sensor lower seat 113
Positioning pin 115
Reinforcing brace 121
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. 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 application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, so that the scope of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
Fig. 1 is a schematic structural diagram of a test device for simulating the head squeezing force of an occupant according to an embodiment of the present invention. FIG. 2 shows a cross-sectional view of a test device for simulating head crush force of an occupant in accordance with an embodiment of the present invention. FIG. 3 is a perspective view of a test device for simulating head crush force of an occupant according to an embodiment of the present invention. As shown in the figure, the testing device 100 for simulating the head squeezing force of an occupant mainly comprises an adjustable base 101, an electric telescopic module 102, an angle adjusting unit 103 and a head type assembly 104.
The adjustable base 101 includes a base plate 105 disposed in a horizontal direction. The substrate 105 can be moved in the X direction or the Y direction and fixed. Conventionally, the X-direction and the Y-direction are perpendicular to each other.
The electrically powered retractable module 102 is disposed on a base plate 105. The motorized telescopic module 102 comprises a telescopic rod 106 arranged in a vertical direction.
The angle adjustment unit 103 includes a ball socket support 107, a ball head 108, and a ball socket 109. The ball-socket support 107 is hollow, and a groove is formed in the top of the ball-socket support. The bottom of the ball hole 109 is provided with a groove. The bottom of the ball head 108 passes through the center of the ball socket support 107, and the bottom of the ball head 108 is fixed on the top of the telescopic rod 106. The bottom of the ball pocket 109 is fixed to the top of the pocket support 107 such that the ball pocket 109 rotates relative to the pocket support 107. The groove of the ball cavity 109 and the groove of the ball cavity support seat 107 are matched up and down relatively to form an accommodating space which is matched with the top of the ball head 108 in a rotating mode.
The head assembly 104 includes a head body 110 and a sensor assembly disposed on the head body 110. The sensor assembly is fixedly disposed on top of the ball cavity 109. The head type body 110 has a hemispherical shape at its periphery for simulating the head of an occupant.
As will be readily understood, the head-type assembly 104 is disposed on the angle adjusting unit 103, and rotating the ball socket 109 relative to the socket support 107 can drive the head-type assembly 104 to follow the rotation for adjusting the rotation angle of the head-type body 110. The angle adjusting unit 103 is fixed on the telescopic rod 106 through the ball head 108, and the lifting of the telescopic rod 106 drives the head type assembly 104 to ascend or descend so as to adjust the height of the head type assembly 104. The electric retractable module 102 is fixed on the adjustable base 101 through the substrate 105, and the position of the substrate 105 in the X direction or the Y direction is adjusted to drive the head assembly 104 thereon to move along with the substrate, so that the head body 110 reaches a designated position in the horizontal direction.
Preferably, the sensor assembly includes a sensor upper mount 111, a triaxial force sensor 112, and a sensor lower mount 113. The triaxial force sensor 112 is disposed on a sensor lower seat 113, and the triaxial sensor is fixed to the top of the ball pocket 109 through the sensor lower seat 113. The triaxial force sensor 112 is fixed in the head type body 110 by a sensor upper seat 111.
Preferably, the triaxial force sensor 112 is fixedly disposed at the center of mass of the head type body 110. When the head-type body 110 is pressed and stressed, the triaxial force sensor 112 collects stress information of the head-type body 110.
Preferably, a plurality of lasers 114 are provided on the head body 110. An external calibration device positions the head assembly 104 via the laser 114. The position of the laser 114 is adjusted by adjusting the angle adjusting unit 103 so that the head unit 104 reaches a specified test position.
Preferably, the testing device 100 further includes a plurality of alignment pins 115. A plurality of mounting holes (not shown) are radially formed in the socket support 107. The top of the ball head 108 is spherical, and is engaged with the upper and lower grooves of the ball socket support 107 and the ball socket 109, and can rotate in the accommodating space formed by the upper and lower grooves, and the rotation is limited within a preset angle. The adjustment is rotated to maintain the top of the ball pocket 109 in a horizontal position. The alignment pins 115 are fitted into the mounting holes, and a plurality of alignment pins 115 are inserted so that the ends of the alignment pins 115 abut against the ball head 108, thereby fixing the ball head 108 to the socket support 107.
Preferably, the electric telescopic module 102 comprises an electric cylinder 116 disposed on the base plate 105, and the electric cylinder 116 is used for controlling the lifting of the telescopic rod 106.
Preferably, a guide sleeve 117 is provided in a vertical direction on the periphery of the top of the electric cylinder 116. In this embodiment two guide sleeves 117 are provided. A guide post seat 118 in the horizontal direction is provided on the top of the telescopic rod 106, and a guide post 119 in the vertical direction is provided on the periphery of the guide post seat 118. In this embodiment, two guide posts 119 are provided, the guide posts 119 penetrating down into the guide sleeve 117. The up-and-down movement of the telescopic rod 106 can drive the guide post seat 118 to move up and down, and further drive the guide post 119 to move up and down in the guide sleeve 117. The guide post 119, the guide post seat 118 and the guide sleeve 117 form a guide structure, so that the up-and-down movement of the telescopic rod 106 is more stable.
Preferably, the motorized telescopic module 102 further comprises a controller 120. The controller 120 is disposed on the substrate 105. The controller 120 receives the force signal transmitted by the sensor assembly and controls the telescopic rod 106 to descend according to the force signal. Specifically, when the head assembly 104 of the testing apparatus 100 is subjected to a large pressing force, the controller 120 determines whether the pressing force reaches a set value for damaging the head assembly 104, and drives the electric cylinder 116 to drive the telescopic rod 106 to descend if the pressing force reaches the set value, so as to prevent the head assembly 104 from being damaged.
Preferably, the testing device 100 further comprises a stiffening brace 121. The reinforcing brace 121 is fixed with the outer walls of the base plate 105 and the electric cylinder 116, and the reinforcing brace 121 is mainly used for reinforcing the electric cylinder 116, so that the whole structure is more stable.
FIG. 4 shows a front view of an adjustable base of a testing device according to one embodiment of the present invention. Fig. 5 is a top view of fig. 4. Fig. 6 is a perspective view of fig. 4. As shown, the adjustable base 101 also preferably includes a bottom plate 122 and an intermediate plate 123. The intermediate plate 123 is disposed between the base plate 105 and the bottom plate 122 at an interval, a guide rail 126 and a first lead screw 124 are disposed on the bottom plate 122 along the X-axis direction, and the bottom of the intermediate plate 123 is engaged with the guide rail 126 on the bottom plate 122 and is engaged with the first lead screw 124. The first lead screw 124 is rotated to move the intermediate plate 123 in the X-axis direction. A guide rail 126 and a second lead screw 125 in the Y-axis direction are provided on the top of the intermediate plate 123, and the bottom of the base plate 105 is engaged with the guide rail 126 on the intermediate plate 123 and engaged with the second lead screw 125. The second lead screw 125 is rotated to move the substrate 105 in the Y-axis direction. The bottom plate 122 of the adjustable base 101 is disposed on the white body, and the position of the base plate 105 in the horizontal direction is adjusted by the adjustment of the first lead screw 124 and the second lead screw 125, so that the head assembly 104 can reach a designated position in the horizontal direction.
The testing device for simulating the head extrusion stress of the passenger provided by the utility model has the following characteristics:
1. the angle between the head type assembly and the horizontal plane is conveniently adjusted through the angle adjusting unit according to the positioning of the laser;
2. the electric telescopic supporting module is used for realizing displacement in the vertical direction, can be manually controlled and can also be automatically controlled through a controller, so that the head type component is protected;
3. the adjustable base enables movement of the head assembly in a horizontal direction.
The testing device for simulating the head extrusion stress of the passenger forms closed-loop control of the head type body stress value acquisition and the electric telescopic supporting module, each adjusting mechanism is high in flexibility, the actual head position of the passenger can be quickly and accurately positioned, and the controller has the characteristic of high responsiveness in an actual test.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A test device for simulating the extrusion stress of the head of a passenger is characterized by comprising,
an adjustable base including a substrate disposed in a horizontal direction, the substrate being movable in an X direction or a Y direction and being fixed;
the electric telescopic module is arranged on the base plate and comprises a telescopic rod arranged in the vertical direction;
the angle adjusting unit comprises a ball cavity supporting seat, a ball head and a ball cavity, the ball cavity supporting seat is of a hollow structure, the top of the ball cavity supporting seat is provided with a groove, the bottom of the ball cavity is provided with a groove, the bottom of the ball head downwards penetrates through the center of the ball cavity supporting seat, the bottom of the ball head is fixed to the top of the telescopic rod, the bottom of the ball cavity is matched and fixed with the top of the ball cavity supporting seat, the ball cavity can rotate relative to the ball cavity supporting seat, and the groove of the ball cavity is matched with the groove of the ball cavity supporting seat to form an accommodating space which is in rotating fit with the top of the ball head;
the head type assembly comprises a head type body and a sensor assembly arranged on the head type body, and the sensor assembly is fixedly arranged at the top of the ball hole.
2. The testing device of claim 1, wherein the sensor assembly includes an upper sensor mount, a triaxial force sensor and a lower sensor mount, the triaxial force sensor being disposed on the lower sensor mount, the triaxial sensor being secured to the top of the ball pocket by the lower sensor mount, the triaxial force sensor being secured within the head body by the upper sensor mount.
3. The testing device of claim 2, wherein the triaxial force sensor is fixedly disposed at a center of mass of the head-form body.
4. The test apparatus of claim 2, wherein a laser is provided on the head form body for positioning the head form assembly.
5. The testing device as claimed in claim 1, further comprising a positioning pin, wherein a plurality of mounting holes are radially formed on the ball socket support, the top of the ball head can rotate within the accommodating space within a set angle to keep the top of the ball socket in a horizontal position, and the positioning pin is engaged with the mounting holes to fix the ball head on the ball socket support.
6. The testing device of claim 1, wherein the motorized telescopic module comprises an electric cylinder disposed on the base plate, the electric cylinder being configured to control the raising and lowering of the telescopic rod.
7. The testing device as claimed in claim 6, wherein a guide sleeve is provided at the periphery of the top of the electric cylinder, a guide post seat is provided at the top of the telescopic rod, a guide post is provided at the periphery of the guide post seat, the guide post penetrates the guide sleeve downwards, and the telescopic rod can drive the guide post seat to move up and down and drive the guide post to move up and down in the guide sleeve.
8. The testing device as claimed in claim 6, wherein the electric retractable module further comprises a controller disposed on the base plate, the controller receives a force signal transmitted by the sensor assembly, and the controller controls the retractable rod to descend according to the force signal.
9. The testing device as claimed in claim 6, further comprising a reinforcing brace fixed to the base plate and an outer wall of the electric cylinder, the reinforcing brace being configured to reinforce the electric cylinder.
10. The testing device as claimed in claim 1, wherein the adjustable base further comprises a bottom plate and an intermediate plate, the intermediate plate is disposed between the base plate and the bottom plate, a guide rail and a first lead screw are disposed on the bottom plate along the X-axis direction, the bottom of the intermediate plate is engaged with the guide rail on the bottom plate and the first lead screw, and the first lead screw is rotated to move the intermediate plate along the X-axis direction; the top of the middle plate is provided with a guide rail and a second screw rod along the Y-axis direction, the bottom of the substrate is matched with the guide rail on the middle plate and matched with the second screw rod, and the second screw rod is rotated to enable the substrate to move along the Y-axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123255343.7U CN216669277U (en) | 2021-12-22 | 2021-12-22 | Testing device for simulating extrusion stress of head of passenger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123255343.7U CN216669277U (en) | 2021-12-22 | 2021-12-22 | Testing device for simulating extrusion stress of head of passenger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216669277U true CN216669277U (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123255343.7U Withdrawn - After Issue CN216669277U (en) | 2021-12-22 | 2021-12-22 | Testing device for simulating extrusion stress of head of passenger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216669277U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235438A (en) * | 2021-12-22 | 2022-03-25 | 上海机动车检测认证技术研究中心有限公司 | Testing device for simulating head extrusion stress of passenger |
-
2021
- 2021-12-22 CN CN202123255343.7U patent/CN216669277U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114235438A (en) * | 2021-12-22 | 2022-03-25 | 上海机动车检测认证技术研究中心有限公司 | Testing device for simulating head extrusion stress of passenger |
| CN114235438B (en) * | 2021-12-22 | 2024-05-28 | 上海机动车检测认证技术研究中心有限公司 | Testing device for simulating extrusion stress of head of passenger |
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Granted publication date: 20220603 Effective date of abandoning: 20240528 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20220603 Effective date of abandoning: 20240528 |