CN210156292U - Novel sounding button - Google Patents
Novel sounding button Download PDFInfo
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- CN210156292U CN210156292U CN201921381167.1U CN201921381167U CN210156292U CN 210156292 U CN210156292 U CN 210156292U CN 201921381167 U CN201921381167 U CN 201921381167U CN 210156292 U CN210156292 U CN 210156292U
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- tuning fork
- key
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- pressing block
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- 238000003825 pressing Methods 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000006698 induction Effects 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 230000009471 action Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010923 batch production Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a novel sounding key, which comprises a key body with a cavity, a trigger mechanism for triggering an induction module, a key core capable of moving up and down, a tension spring for resetting the key core, and a U-shaped elastic tuning fork, wherein one end of the tuning fork is a free end for striking and sounding, and the other end of the tuning fork is an installation fixed end; the free end of the tuning fork is positioned at one side of the key core in the key body, and a tuning fork pressing block protruding out of the key core is arranged at the part of the key core corresponding to the free end. According to the application, the combination of the tuning fork, the tuning fork pressing block and the inclined landslide is adopted, so that the pressing hand feeling can be effectively improved, and the knocking sound of the falling feeling can be provided; meanwhile, the combination of the moving part and the tuning fork is adopted, the free end of the tuning fork generates sound by impact when rebounding and resetting, the free end also provides an upward acting force for the moving part at the same moment to move upwards, and then triggering is realized, and the two processes are good in synchronism; the movable part has the advantages of ingenious structural combination, simple structure, low production and manufacturing cost and low combination difficulty among parts.
Description
Technical Field
The utility model relates to a button device field, concretely relates to novel sound production button.
Background
The conventional elastic keys (such as membrane keys) have a very wide application range, and trigger switch signals when the keys are knocked or pressed, so that the keys rebound through the elastic materials of the keys. The elastic key has the problems that when the key is knocked or pressed, due to the fact that a micro-spring switch structure of a mechanical key is not provided, the elastic key is almost free of knocking sound with a section sense, the triggering process is soft and continuous, and the hand feeling is poor. If the traditional elastic key is required to be subjected to sound production transformation, the technology is very complex, and the cost is too high.
The keys of the existing induction type mechanical keyboard are usually combined by a hammer structure and a sensor (a photoelectric switch or a Hall switch), and the hammer is driven to move downwards by a key core to obtain a trigger signal; the structure design of the impact hammer only has a pressing hand feeling and a pressing sound, and can not meet various requirements of customers on hand feeling. The design has hand feeling and sound when being pressed and reset.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model aims at providing a simple structure, triggering signal and sound production synchronism are good, the installation is convenient, sound and feel the equal good novel sound production button.
In order to realize the technical purpose, the utility model discloses a scheme is: a novel sounding key is used for being installed on a PCB body provided with a switch induction module, and comprises a key body with a cavity, a trigger mechanism for triggering the induction module, a key core capable of moving up and down, a tension spring for resetting the key core, and a U-shaped elastic tuning fork, wherein one end of the tuning fork is a free end for striking and sounding, and the other end of the tuning fork is an installation fixed end;
the free end of the tuning fork is positioned on one side of a key core in the key body, a tuning fork pressing block protruding out of the key core is arranged on the part of the key core corresponding to the free end, when the key core is not pressed, the free end of the tuning fork is positioned at the bottom of the tuning fork pressing block and is close to one side of the key core, and when the key core is pressed to move to the bottommost part, the free end of the tuning fork is lower than the top of the tuning fork pressing block; an inclined slide slope is arranged below the free end of the tuning fork, and the inclined plane of the inclined slide slope extends away from the key core;
when the key core is pressed downwards, the tuning fork pressing block presses the free end of the tuning fork to downwards store force along the inclined slide slope and in the direction far away from the key core, and when the free end descends to the position far away from the bottom of the tuning fork pressing block, the free end instantly bounces upwards to hit the inner wall of the key body positioned at the upper part of the free end to send hitting sound; when the key core is released and reset upwards, the tuning fork pressing block moves upwards to leave the free end of the tuning fork, and the free end instantly rebounds to the side of the key core to hit the inner wall of the key body on the side to send a hitting sound.
Preferably, the trigger mechanism is a movable part, a limit groove is arranged in the key body, the movable part is embedded in the limit groove, and the movable part can move up and down along the inner side of the limit groove;
the top end of the movable part is provided with an inclined chute, the inclined plane of the chute bottom of the inclined chute is an inclined sliding slope, when the tuning fork pressing block obliquely presses the free end of the tuning fork downwards, the free end can be movably pressed into the inclined chute along the inclined sliding slope, and the movable part can movably trigger the switch induction module up and down;
when the key core is pressed downwards, the tuning fork pressing block presses the free end of the tuning fork to store force downwards along the inclined sliding slope and slide into the inclined sliding groove, and when the free end descends to a position away from the bottom of the tuning fork pressing block, the free end bounces upwards in the inclined sliding groove to drive the movable piece to move upwards along the limiting groove; when the key core is loosened and reset upwards, the tuning fork pressing block moves upwards to leave the free end of the tuning fork, the free end rebounds to the key core side instantly to leave the inclined sliding groove, and the moving part falls back downwards along the limiting groove under the action of self gravity.
Preferably, the triggering mechanism is arranged below or on one side of the key core, a slot hole is correspondingly formed in the key body, and the triggering mechanism can vertically and movably trigger the switch induction module in the slot hole.
Preferably, the switch sensing module is a photoelectric switch or a hall switch.
Preferably, the PCB board is correspondingly provided with a through hole having a trapezoidal groove structure, and the lower end of the movable member has a trapezoidal structure.
Preferably, the limiting groove is positioned on a corner at one side of the key body.
Preferably, the key body comprises a key seat and a key cover, and the key seat and the key cover are connected in a snap fit manner or are in an integrated structure.
Preferably, an upper limiting wall and a side limiting wall are respectively arranged in the key body, the upper limiting wall is located above the free end of the tuning fork, and the side limiting wall is located on one side of the free end of the tuning fork.
Preferably, when the key core is pressed to the bottommost part, the free end of the tuning fork is lower than the top of the tuning fork pressing block.
Preferably, the top of the tuning fork pressing block is provided with a limiting block.
The beneficial effects of the utility model are that the combination of the tuning fork, the tuning fork pressing block and the inclined landslide is adopted, the pressing hand feeling can be effectively improved, the knocking sound of the falling feeling can be provided, the cost is low, and the installation is convenient; the combination of the moving part and the tuning fork is adopted, the free end of the tuning fork generates sound by impact when rebounding and resetting, the free end also provides an upward acting force for the moving part at the same moment to move upwards, and then triggering is realized, and the two processes are good in synchronism; meanwhile, the movable piece replaces the punch hammer, the movable piece is a part of the sounding structure and is also a triggering structure, and the movable piece is easier to manufacture and install than the punch hammer; the movable part has the advantages of ingenious combination, simple structure, low production and manufacturing cost, low combination difficulty among parts, high installation efficiency and suitability for batch production and use; meanwhile, the tuning fork with the U-shaped metal elastic structure is strong in fatigue resistance, not easy to wear and long in service life.
Drawings
Fig. 1 is an exploded view of a first embodiment of the present invention;
FIG. 2 is a schematic structural view of the key core of the present invention;
FIG. 3 is a schematic view of a partial structure of the present invention;
FIG. 4 is a schematic structural view of the movable member and the tuning fork of the present invention;
fig. 5 is a perspective view of the present invention;
fig. 6 is a schematic view of a partial structure of the key base of the present invention after a tuning fork and a moving member are mounted thereon;
fig. 7 is a schematic view of a partial structure of the key pad of the present invention;
FIG. 8 is a schematic structural view of the key cover of the present invention;
fig. 9 is a schematic partial structure view of a side view surface of a second embodiment of the present invention;
fig. 10 is a schematic partial structure diagram of a second embodiment of the present invention;
fig. 11 is an exploded view of a second embodiment of the present invention;
fig. 12 is a schematic partial structure diagram of a third embodiment of the present invention;
fig. 13 is a schematic structural diagram of a key base and a tuning fork according to a third embodiment of the present invention;
fig. 14 is a schematic structural diagram of a key core and a tuning fork according to a third embodiment of the present invention.
Wherein: 1, a key seat; 2 a tension spring; 3, a key core; 4, a trigger mechanism; 401, limiting a groove; 402 a movable member; 403 inclined sliding chutes; 5, slope sliding; 6, a PCB body; 7, a tuning fork; 701 a free end; 702 a fixed end; 8, a tuning fork pressing block; 9, a switch induction module; 10 through holes; 11 side limiting walls; 12, an upper limit wall; 13 a key cover; 14 a key body; 15 a limiting block; 16 slotted holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-14, the embodiment of the present invention is a novel sounding button, for being mounted on a PCB board 6 having a switch sensing module 9, the button includes a key body 14 having a cavity, a triggering mechanism 4 for triggering the sensing module, a key core 3 capable of moving up and down, and a tension spring 2 for resetting the key core 3, and further includes a U-shaped elastic tuning fork 7, one end of the tuning fork 7 is a free end 701 for striking and sounding, and the other end of the tuning fork 7 is a mounting fixed end 702;
the free end 701 of the tuning fork 7 is positioned at one side of the key core 3 in the key body 14, a tuning fork pressing block 8 protruding out of the key core 3 is arranged at the part of the key core 3 corresponding to the free end 701, and when the key core 3 is not pressed, the tuning fork free end 701 is positioned at the bottom of the tuning fork pressing block 8 and close to one side of the key core 3; an inclined ramp 5 is also arranged below the free end 701 of the tuning fork, and the inclined plane of the inclined ramp 5 extends away from the key core;
when the key core 3 is pressed downwards, the tuning fork press block 8 presses the free end 701 of the tuning fork to downwards accumulate force along the inclined slide slope 5 and in the direction far away from the key core 3, and when the free end 701 descends to the bottom of the tuning fork press block 8, the free end bounces upwards instantly to hit the inner wall of the key body on the upper part of the free end 701 to send hitting sound; when the key core 3 is released and reset upwards, the tuning fork press block 8 moves upwards to leave the tuning fork free end 701, and the free end 701 instantly rebounds to the key core side to hit the inner wall of the key body on the side to generate hitting sound.
In order to improve the synchronism of sound generation and triggering, as shown in fig. 1-4, in the first embodiment, the triggering mechanism 4 is a movable member 402, a limit groove 401 is arranged in the key body 14, the movable member 402 is embedded in the limit groove 401, and the movable member 402 can move up and down along the inner side of the limit groove 401;
the top end of the moving member 402 is provided with an inclined chute 403, the inclined surface of the bottom of the inclined chute 403 is an inclined slide slope 5, when the tuning fork pressing block 8 obliquely presses the tuning fork free end 701 downwards, the free end 701 can be movably pressed into the inclined chute 403 along the inclined slide slope 5, and the moving member 402 can movably trigger the switch induction module 9 up and down;
the triggering and sounding principle of the first embodiment is as follows: when the key core 3 is pressed downwards, the tuning fork pressing block 8 presses the free end 701 of the tuning fork to store force downwards along the inclined sliding slope 5 and slide into the inclined sliding groove 403, when the free end 701 descends to a position away from the bottom of the tuning fork pressing block 8, the free end 701 bounces upwards in the inclined sliding groove 403 to drive the moving piece 402 to move upwards along the limiting groove 401, the switch induction module 9 obtains a signal, and meanwhile, the switch induction module bounces upwards instantly to hit the inner wall of the key body on the upper portion of the free end 701 to send a first hitting sound; when the key core 3 is loosened and reset upwards, the tuning fork press block 8 moves upwards to be away from the tuning fork free end 701, the free end 701 instantly rebounds to the key core 3 side to be away from the inclined sliding groove 403, the movable piece 402 drops downwards along the limiting groove 401 under the action of self gravity, and meanwhile, the free end 701 instantly rebounds to the key core side to hit the inner wall of the key body on the side to send secondary hitting sound.
In order to simplify the structure, reduce the cost and facilitate the installation, the triggering mechanism 4 is arranged below or on one side of the key core 3, a slot hole 16 is correspondingly arranged on the key body 14, and the triggering mechanism 4 can movably trigger the induction module 9 and the inclined slope 5 up and down in the slot hole 16.
As shown in fig. 9-11, in the second embodiment, the triggering mechanism 4 is an extended structure right below the key core 3, and when the key core is pressed down, the triggering mechanism below the key core moves downwards until the sensing module is triggered; after the key core is loosened, the key core is restored to the original position under the action of the reset spring, and the trigger mechanism moves upwards at the same time and is far away from the induction module.
Referring to fig. 12-14, in the third embodiment, the triggering mechanism 4 is a protruding structure (see fig. 14) on the side surface of the key core 3, when the key core is pressed down, the triggering mechanism below the key core moves downwards until the sensing module is triggered; after the key core is loosened, the key core is restored to the original position under the action of the reset spring, and the trigger mechanism moves upwards at the same time and is far away from the induction module. The trigger mechanism and the tuning fork are positioned on different sides in the key body and cannot influence each other.
The sensing module is a photoelectric switch or a Hall switch. Taking the first embodiment as an example, the lower end portion of the moving member 402 is provided with a photoelectric switch, the photoelectric switch is mounted or mounted on a PCB, the middle of the photoelectric switch is further provided with a through hole 10, the lower end portion of the moving member is mounted on the through hole 10 in an embedded manner, and the moving member 402 can block the optical path of the photoelectric switch when being inserted into the through hole 10. When the moving part moves upwards to leave the through hole, the photoelectric switch forms a light path, so that the triggering operation can be completed, and the equipment obtains a triggering signal.
Taking the first embodiment as an example, a hall switch is correspondingly disposed at the lower end of the movable member 402, and the whole or the lower portion of the movable member 402 is made of a magnetic material. The movable member can be close to or far from the hall switch. When the moving part moves upwards and is far away from the Hall switch, the magnetic flux changes, the triggering operation can be completed, and the equipment obtains a triggering signal at the moment.
In order to enable the lower end of the movable member to be better embedded into the limiting hole, the PCB board 6 is correspondingly provided with a through hole 10 having a trapezoidal groove structure, and the lower end of the movable member 402 has a trapezoidal structure. When the moving part is static, the lower end extending out of the limiting groove can be well embedded into the through hole in the PCB, and the moving part with the trapezoid structure is narrow in lower end and wide in upper end. If the structure is rectangular, the moving part can completely slide out from the limiting groove, and the installation is not facilitated.
In order to optimize the space structure, the limiting groove 401 is located on a side corner in the key body 14, and the moving parts in the limiting groove only perform hand feeling and sound use and do not affect the up-and-down movement of the key core. The limiting grooves are positioned on the corners to reduce the influence of the limiting grooves on the up-and-down movement of the key core.
For convenience of installation, the key body 14 comprises a key seat 4 and a key cover 12, and the key seat 4 and the key cover 12 are in snap connection. Alternatively, the key base 4 and the key cover 13 are formed in an integral structure, the key cover on the upper portion is made of a flexible material, and the key core and other parts can be inserted and mounted through the opening of the key cover.
In order to make the free end move in the self-defined area, the tuning fork free end 701 is lower than the top of the tuning fork briquetting 8 when the key core 3 is pressed to travel to the bottommost part. And the top of the tuning fork pressing block 8 is provided with a limiting block 15. If the key core is pressed to the lowest part, the free end crosses the tuning fork pressing block, the free end is likely to be impacted once, the free end is easily clamped at the top of the tuning fork pressing block, the resistance is larger when the key is loosened and reset, and the design is not good in hand feeling. And when the key core is pressed to move to the bottommost part, the free end cannot cross the top of the tuning fork pressing block, and the free end keeps in a force accumulation state. Or through the limiting block, the free end of the tuning fork is always lower than the top of the tuning fork pressing block when the key core is pressed to move to the bottommost part.
In order to optimize the spatial structure, an upper limit wall 12 and a side limit wall 11 are respectively arranged in the key body 14, the upper limit wall 12 is positioned above the tuning fork free end 701 (the free end generates the impact sound for the first time, the upper limit wall is hit), and the side limit wall 11 is positioned on one side of the tuning fork free end 701 (the free end generates the impact sound for the second time, the side limit wall is hit). The upper limiting wall is arranged on the key cover or the key seat, and the side limiting wall is arranged on the key cover or the key seat. The upper limit wall and the side limit wall can be arranged on the key cover or the key seat according to requirements. In fig. 6-7, the side limiting walls are provided on the keybed. As shown in fig. 2-4, when in use, the tension spring and the tuning fork in the key core can be pressed down only after reaching a certain force, so that a good step-down pressing hand feeling can be provided.
The combination of the tuning fork, the tuning fork pressing block and the inclined landslide is adopted, the pressing hand feeling can be effectively improved, the knocking sound of the falling feeling can be provided, the cost is low, and the installation is convenient; the combination of the moving part and the tuning fork is adopted, the free end of the tuning fork generates sound by impact when rebounding and resetting, the free end also provides an upward acting force for the moving part at the same moment to move upwards, and then triggering is realized, and the two processes are good in synchronism; meanwhile, the movable piece replaces the punch hammer, the movable piece is a part of the sounding structure and is also a triggering structure, and the movable piece is easier to manufacture and install than the punch hammer; the movable part has the advantages of ingenious combination, simple structure, low production and manufacturing cost, low combination difficulty among parts, high installation efficiency and suitability for batch production and use; meanwhile, the tuning fork with the U-shaped metal elastic structure is strong in fatigue resistance, not easy to wear and long in service life.
The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.
Claims (10)
1. The utility model provides a novel sound production button for install on the PCB plate body that is equipped with switch response module, the button is including the key body that has the cavity, trigger mechanism who triggers response module and the key core that can reciprocate and the tension spring that is used for the key core to reset, its characterized in that: the tuning fork also comprises a U-shaped elastic tuning fork, one end of the tuning fork is a free end used for striking and sounding, and the other end of the tuning fork is a mounting fixed end;
the free end of the tuning fork is positioned on one side of a key core in the key body, a tuning fork pressing block protruding out of the key core is arranged at the position of the key core corresponding to the free end, and when the key core is not pressed, the free end of the tuning fork is positioned at the bottom of the tuning fork pressing block and is close to one side of the key core; an inclined slide slope is arranged below the free end of the tuning fork, and the inclined plane of the inclined slide slope extends away from the key core;
when the key core is pressed downwards, the tuning fork pressing block presses the free end of the tuning fork to downwards store force along the inclined slide slope and in the direction far away from the key core, and when the free end descends to the position far away from the bottom of the tuning fork pressing block, the free end instantly bounces upwards to hit the inner wall of the key body positioned at the upper part of the free end to send hitting sound; when the key core is released and reset upwards, the tuning fork pressing block moves upwards to leave the free end of the tuning fork, and the free end instantly rebounds to the side of the key core to hit the inner wall of the key body on the side to send a hitting sound.
2. The sounding button of claim 1, wherein: the trigger mechanism is a movable part, a limit groove is arranged in the key body, the movable part is embedded in the limit groove, and the movable part can move up and down along the inner side of the limit groove;
the top end of the movable part is provided with an inclined chute, the inclined plane of the chute bottom of the inclined chute is an inclined sliding slope, when the tuning fork pressing block obliquely presses the free end of the tuning fork downwards, the free end can be movably pressed into the inclined chute along the inclined sliding slope, and the movable part can movably trigger the switch induction module up and down;
when the key core is pressed downwards, the tuning fork pressing block presses the free end of the tuning fork to store force downwards along the inclined sliding slope and slide into the inclined sliding groove, and when the free end descends to a position away from the bottom of the tuning fork pressing block, the free end bounces upwards in the inclined sliding groove to drive the movable piece to move upwards along the limiting groove; when the key core is loosened and reset upwards, the tuning fork pressing block moves upwards to leave the free end of the tuning fork, the free end rebounds to the key core side instantly to leave the inclined sliding groove, and the moving part falls back downwards along the limiting groove under the action of self gravity.
3. The novel sound generating key according to claim 1, characterized in that: the trigger mechanism is arranged below or on one side of the key core, a slotted hole is correspondingly formed in the key body, and the trigger mechanism can vertically and movably trigger the switch induction module in the slotted hole.
4. The novel sound generating key according to claim 1, characterized in that: the switch induction module is a photoelectric switch or a Hall switch.
5. The new sound generating key as claimed in claim 2, wherein: the PCB body is correspondingly provided with a through hole with a trapezoidal groove structure, and the lower end part of the movable part is of a trapezoidal structure.
6. The new sound generating key as claimed in claim 2, wherein: the limiting groove is positioned on a corner at one side of the key body.
7. The novel sound generating key according to claim 1, characterized in that: the key body comprises a key seat and a key cover, wherein the key seat and the key cover are connected in a buckling mode, or the key seat and the key cover are of an integrated structure.
8. The novel sound generating key according to claim 1, characterized in that: an upper limiting wall and a side limiting wall are respectively arranged in the key body, the upper limiting wall is located above the free end of the tuning fork, and the side limiting wall is located on one side of the free end of the tuning fork.
9. The novel sound generating key according to claim 1, characterized in that: when the key core is pressed to travel to the bottommost part, the free end of the tuning fork is lower than the top of the tuning fork pressing block.
10. The new sound generating key of claim 9, wherein: and the top of the tuning fork pressing block is provided with a limiting block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921381167.1U CN210156292U (en) | 2019-08-23 | 2019-08-23 | Novel sounding button |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921381167.1U CN210156292U (en) | 2019-08-23 | 2019-08-23 | Novel sounding button |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210156292U true CN210156292U (en) | 2020-03-17 |
Family
ID=69767166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921381167.1U Withdrawn - After Issue CN210156292U (en) | 2019-08-23 | 2019-08-23 | Novel sounding button |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210156292U (en) |
-
2019
- 2019-08-23 CN CN201921381167.1U patent/CN210156292U/en not_active Withdrawn - After Issue
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| TR01 | Transfer of patent right |
Effective date of registration: 20230711 Address after: No. 1603, Zhejiang Dongguan Business Center, Dongguan Rural Commercial Bank Tangxia Branch Building, No. 5 Yingbin Avenue, Tangxia Town, Dongguan City, Guangdong Province, 523716 (cluster registration) Patentee after: Guangdong Hengfeng Enterprise Management Co.,Ltd. Address before: 523718 No.6 Dongyu 2nd Street, Xiekeng Industrial Zone, Qingxi Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN MINGJIAN ELECTRONIC TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20200317 Effective date of abandoning: 20240308 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200317 Effective date of abandoning: 20240308 |