CN218336349U - TWS bluetooth headset storage device - Google Patents

Abstract

The utility model discloses a TWS Bluetooth headset storage device, which relates to the technical field of Bluetooth headsets and comprises a box body, wherein one side of the box body is fixedly provided with an auxiliary shell, the front and the back of the auxiliary shell are both provided with air inlets, the inner walls of the two air inlets are both fixedly provided with a first dust screen, one side of the auxiliary shell is provided with a mounting groove, and the inner wall of the mounting groove is fixedly provided with a refrigeration plate; the utility model has the advantages that: the heat that will refrigerate board one side through a plurality of refrigeration pieces of refrigeration inboard part shifts to the opposite side of refrigeration board to reduce the temperature of the inside air of supplementary groove, promote the temperature of the inside air of supplementary shell, still have good radiating effect in summer, can not introduce the dust to the inside of box body simultaneously, through the auxiliary assembly who sets up, be convenient for promote the radiating effect of the inside air of supplementary shell.

Description

TWS bluetooth headset storage device

Technical Field

The utility model relates to an storage device, in particular to TWS bluetooth headset storage device belongs to bluetooth headset technical field.

Background

The working principle of the TWS Bluetooth headset is that a mobile phone is connected with a host computer through Bluetooth, the host computer is connected with a slave computer through a Near Field Magnetic Induction (NFMI) or TWS protocol, when the TWS Bluetooth headset works, music signals on the mobile phone are transmitted to the host computer through Bluetooth, and then the host computer is transmitted to the slave computer through the NFMI or the TWS protocol, so that the left headset and the right headset receive signals. The TWS Bluetooth headset is popular with users due to the characteristics of small volume, portability and the like;

wherein the application number is "CN202023341854.6" the disclosed "a TWS bluetooth headset storage device" also is mature technique day by day, it "including the box body and the lid that the upset was opened and shut and is set up in box body one side, one side of box body orientation lid is equipped with the chamber of charging that is used for placing TWS bluetooth headset, the inside control mainboard that is provided with of box body and the battery that is used for giving TWS bluetooth headset power supply, the integrated control circuit that is used for charge-discharge control that has in one side of control mainboard, one side that the control mainboard deviates from control circuit is equipped with the heat-conducting plate, the heat-conducting plate is located between control mainboard and the battery. The application solves the problem that the TWS Bluetooth headset charging box is poor in heat dissipation effect, but the device has the following defects in actual use.

Through setting up louvre and auxiliary heat dissipation board for the air in the box body flows to realize charging the faster heat dissipation of box, but the diameter of heat conduction hole is limited, and the air flow is little, and therefore the radiating effect is not good.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a TWS bluetooth headset storage device to the diameter of the heat conduction hole that provides in solving above-mentioned background art is limited, and the air mass flow is little, therefore the not good problem of radiating effect.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a TWS bluetooth headset storage device, includes the box body, the fixed supplementary shell that is equipped with in one side of box body, the air inlet has all been seted up, two to the front and the back of supplementary shell the inner wall of air inlet is the fixed first dust screen that is equipped with all, the mounting groove has been seted up to one side of supplementary shell, the fixed refrigeration board that is equipped with of inner wall of mounting groove, the fixed a plurality of refrigeration piece that is equipped with in inside of refrigeration board, and the heat-absorbing surface of a plurality of refrigeration piece all towards the inside of box body, the auxiliary tank that is linked together with the inside of box body is seted up to one side of box body, the inner wall in auxiliary tank is connected with the fixed surface of refrigeration board, the opposite side of supplementary shell is equipped with the auxiliary assembly, the opposite side of box body is equipped with the subassembly of ventilating.

Preferably, the auxiliary assembly includes an installation section of thick bamboo, the fixed opposite side that sets up at the auxiliary shell of an installation section of thick bamboo, first through-hole has been seted up to the one end of an installation section of thick bamboo, the inner wall sliding connection of first through-hole has the transfer line, the fixed carousel that is equipped with in one end of transfer line, the other end of transfer line passes the opposite side of auxiliary shell and places the inside of auxiliary shell in, the fixed torsion spring and a plurality of push pedal that are equipped with respectively in surface of transfer line, torsion spring arranges the inside of an installation section of thick bamboo in, torsion spring's surface and the inner wall fixed connection of an installation section of thick bamboo, a plurality of the push pedal is annular evenly distributed, a plurality of the inside of auxiliary shell is all placed in to the push pedal.

Preferably, the fixed surface of transfer line is equipped with two spacing rings, two the one end of spacing ring is all fixed and is equipped with two stoppers, four the vertical cross-section of stopper is semi-circular, wherein two the surface of stopper and the inner wall sliding connection of installation section of thick bamboo one end, two in addition the surface of stopper and the opposite side sliding connection of auxiliary housing.

Preferably, a second through hole is formed in the other side of the auxiliary shell, and the inner wall of the second through hole is in sliding connection with the surface of the transmission rod.

Preferably, the ventilation assembly comprises a ventilation pipe, the ventilation pipe is fixedly arranged on the other side of the box body, the inside of the ventilation pipe is communicated with the inside of the box body, external threads are fixedly arranged on the surface of the ventilation pipe, a second dustproof net is fixedly arranged on the inner wall of the ventilation pipe, an adjusting cap is in threaded connection with the surface of the ventilation pipe, two ventilation grooves are formed in the surface of the adjusting cap, and the insides of the two ventilation grooves are communicated with the inside of the adjusting cap.

Preferably, the storage battery is fixedly arranged in the box body, the top end of the box body is hinged to the box cover, the lifting plate is fixedly arranged on the front side of the box cover, an iron sheet is fixedly arranged in the lifting plate, a rubber anti-slip block is fixedly arranged at the bottom end of the lifting plate, the middle of the rubber anti-slip block is sunken, the switch panel and the fixing plate are fixedly arranged on the front side of the box body respectively, a magnet sheet is fixedly arranged in the fixing plate, and the top end of the fixing plate is connected with the bottom end of the lifting plate in a sliding mode.

Preferably, the surface of the switch panel is provided with a refrigeration sheet switch, and the plurality of refrigeration sheets are electrically connected with the storage battery through the refrigeration sheet switch.

Compared with the prior art, the utility model provides a pair of TWS bluetooth headset storage device has following beneficial effect:

1. the heat of one side of the refrigeration plate is transferred to the other side of the refrigeration plate through the plurality of refrigeration sheets in the refrigeration plate, so that the temperature of the air in the auxiliary groove is reduced, the temperature of the air in the auxiliary shell is increased, the auxiliary groove is communicated with the inside of the box body, the temperature of the gas in the box body is reduced, and the heat dissipation of the charging box is realized;

2. through the arranged auxiliary assembly, the heat dissipation effect of air in the auxiliary shell is convenient to improve, the air in the auxiliary shell can be gradually heated due to the work of the refrigerating sheet, the phenomenon that the refrigerating sheet is burnt due to overhigh temperature can be avoided through the auxiliary assembly, the rotary disc drives the transmission rod to rotate, the transmission rod drives the torsion spring to rotate, the torsion spring is tightened, the torsion spring converts kinetic energy into elastic potential energy, the rotary disc is loosened, the torsion spring is loosened, the elastic potential energy is converted into the kinetic energy by the torsion spring, the transmission rod is prompted to rotate by the torsion spring, the transmission rod rotates to drive the push plates to rotate around the transmission rod, air is stirred, the flow of the air is accelerated, and the heat dissipation is performed on the interior of the auxiliary shell;

3. the ventilation assembly is arranged, so that the refrigeration plate can be not used for heat dissipation in winter, the adjusting cap is rotated, the inside of the ventilation groove is communicated with the inside of the ventilation pipe through the inside of the adjusting cap, the convection of the outside air and the air inside the box body is promoted through the ventilation pipe, the heat dissipation is realized, compared with the direct screwing-out of the adjusting cap, the adjusting cap is not easy to lose while the heat dissipation effect is ensured, the convection of the outside high-temperature gas and the low-temperature gas inside the box body can be reduced during the work of the refrigeration plate through the arranged ventilation assembly, the temperature inside the box body can be favorably reduced by the refrigeration plate, and the ventilation assembly is very flexible;

4. the box cover is convenient to fix and open through the matching of the lifting plate, the rubber protective block and the fixed plate, the iron sheet is fixedly arranged inside the lifting plate, the magnet sheet is fixedly arranged inside the fixed plate, when the box cover needs to be opened, the concave part of the rubber anti-slip block is pressed by fingers to extrude the rubber anti-slip block upwards, the lifting plate adsorbed at the top end of the fixed plate is separated from the fixed plate, the middle part of the arranged rubber anti-slip block is concave, the finger slip is avoided, the lifting plate is convenient to move, when the box cover needs to be tightly covered, the box cover is moved through the lifting plate, the lifting plate is enabled to be adsorbed by the fixed plate, and the box cover is further stabilized, so that the box cover is very convenient;

5. through the cooperation of two spacing rings and four stoppers that set up, carry on spacingly to the transfer line, wherein the surface of two stoppers and the inner wall sliding connection of an installation section of thick bamboo one end, the surface of two other stoppers and the opposite side sliding connection of supplementary shell to prevent the transfer line and slide along the inner wall horizontal slip of first through-hole when rotating, the perpendicular cross-section of four stoppers is semi-circular, reduce wherein two stoppers and the friction between the installation section of thick bamboo, reduce the friction between two other stoppers and the supplementary shell, be favorable to rotating the transfer line.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic structural view of the box cover of the present invention;

FIG. 3 is a schematic cross-sectional view of the auxiliary housing of the present invention;

fig. 4 is a schematic structural view of the transmission rod of the present invention;

fig. 5 is a schematic cross-sectional view of the ventilation assembly of the present invention.

In the figure: 1. a box body; 2. an auxiliary housing; 3. an air inlet; 4. a first dust screen; 5. an auxiliary component; 501. mounting the cylinder; 502. a first through hole; 503. a transmission rod; 504. a torsion spring; 505. pushing the plate; 506. a turntable; 6. a vent assembly; 601. a breather pipe; 602. an adjusting cap; 603. a vent channel; 604. a second dust screen; 7. an auxiliary groove; 8. a box cover; 9. a switch panel; 10. a limiting ring; 11. a limiting block; 12. a second through hole; 13. lifting the plate; 14. a rubber anti-skid block; 15. a fixing plate; 16. mounting grooves; 17. a refrigeration plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example 1:

referring to fig. 1-5, the utility model provides a TWS bluetooth headset storage device, including box body 1, one side of box body 1 is fixed and is equipped with auxiliary housing 2, air inlet 3 has all been seted up at the front and the back of auxiliary housing 2, the inner wall of two air inlets 3 all is fixed and is equipped with first dust screen 4, mounting groove 16 has been seted up to one side of auxiliary housing 2, the inner wall of mounting groove 16 is fixed and is equipped with refrigeration board 17, the inside of refrigeration board 17 is fixed and is equipped with a plurality of refrigeration pieces, and the heat absorbing surface of a plurality of refrigeration pieces all faces the inside of box body 1, one side of box body 1 is seted up the auxiliary groove 7 that is linked together with the inside of box body 1, the inner wall of auxiliary groove 7 is connected with the fixed surface of refrigeration board 17, the opposite side of auxiliary housing 2 is equipped with auxiliary assembly 5, the opposite side of box body 1 is equipped with ventilation assembly 6;

the other side of the auxiliary shell 2 is provided with a second through hole 12, and the inner wall of the second through hole 12 is connected with the surface of the transmission rod 503 in a sliding manner;

a storage battery is fixedly arranged inside the box body 1, a box cover 8 is hinged to the top end of the box body 1, a lifting plate 13 is fixedly arranged on the front side of the box cover 8, an iron sheet is fixedly arranged inside the lifting plate 13, a rubber anti-skidding block 14 is fixedly arranged at the bottom end of the lifting plate 13, the middle of the rubber anti-skidding block 14 is sunken, a switch panel 9 and a fixing plate 15 are fixedly arranged on the front side of the box body 1 respectively, a magnet sheet is fixedly arranged inside the fixing plate 15, and the top end of the fixing plate 15 is connected with the bottom end of the lifting plate 13 in a sliding mode;

the surface of the switch panel 9 is provided with a refrigerating sheet switch, and the plurality of refrigerating sheets are electrically connected with the storage battery through the refrigerating sheet switch;

please refer to fig. 1-5, the utility model provides a TWS bluetooth headset storage device is still including auxiliary assembly 5, auxiliary assembly 5 is including installation section of thick bamboo 501, installation section of thick bamboo 501 is fixed to be set up at the opposite side of auxiliary housing 2, first through-hole 502 has been seted up to installation section of thick bamboo 501's one end, the inner wall sliding connection of first through-hole 502 has transfer line 503, the fixed carousel 506 that is equipped with of one end of transfer line 503, the other end of transfer line 503 passes the opposite side of auxiliary housing 2 and places in the inside of auxiliary housing 2, the surface of transfer line 503 is fixed respectively is equipped with torsion spring 504 and a plurality of push pedal 505, torsion spring 504 places in the inside of installation section of thick bamboo 501, the surface of torsion spring 504 and the inner wall fixed connection of installation section of thick bamboo 501, a plurality of push pedal 505 are annular evenly distributed, a plurality of push pedal 505 all place in the inside of auxiliary housing 2;

two limiting rings 10 are fixedly arranged on the surface of the transmission rod 503, two limiting blocks 11 are fixedly arranged at one ends of the two limiting rings 10, the vertical sections of the four limiting blocks 11 are semicircular, the surfaces of the two limiting blocks 11 are connected with the inner wall of one end of the installation cylinder 501 in a sliding manner, and the surfaces of the other two limiting blocks 11 are connected with the other side of the auxiliary shell 2 in a sliding manner;

specifically, as shown in fig. 1, 3 and 4, the rotary disc 506 is rotated, the rotary disc 506 drives the transmission rod 503 to rotate, the transmission rod 503 drives the torsion spring 504 to rotate, the torsion spring 504 is tightened, the torsion spring 504 converts kinetic energy into elastic potential energy, the rotary disc 506 is loosened, the torsion spring 504 converts the elastic potential energy into kinetic energy, the torsion spring 504 drives the transmission rod 503 to rotate, the transmission rod 503 rotates to drive the push plates 505 to rotate around the transmission rod 503, so as to stir air, accelerate the flow of air, dissipate heat inside the auxiliary shell 2, reduce the temperature of one side of the cooling surface of the cooling fins inside the cooling plate 17, facilitate the normal operation of the cooling fins, wherein the surfaces of two limit blocks 11 are slidably connected with the inner wall at one end of the mounting cylinder 501, the surfaces of the other two limit blocks 11 are slidably connected with the other side of the auxiliary shell 2, so as to prevent the transmission rod 503 from sliding left and right along the inner wall of the first through hole 502 when rotating, the vertical cross sections of the four limit blocks 11 are all semicircular, reduce the friction between the two limit blocks 11 and the mounting cylinder 501, reduce the friction between the other two limit blocks 11 and the auxiliary shell 2, and facilitate the rotation of the transmission rod 503.

Example 2:

the ventilation assembly 6 comprises a ventilation pipe 601, the ventilation pipe 601 is fixedly arranged at the other side of the box body 1, the inside of the ventilation pipe 601 is communicated with the inside of the box body 1, the surface of the ventilation pipe 601 is fixedly provided with external threads, the inner wall of the ventilation pipe 601 is fixedly provided with a second dustproof net 604, the surface of the ventilation pipe 601 is in threaded connection with an adjusting cap 602, the surface of the adjusting cap 602 is provided with two ventilation grooves 603, and the insides of the two ventilation grooves 603 are both communicated with the inside of the adjusting cap 602;

specifically, as shown in fig. 1 and 5, the refrigeration plate 17 may not be used in winter, the adjustment cap 602 is rotated, so that the inside of the vent groove 603 is communicated with the inside of the vent pipe 601 through the inside of the adjustment cap 602, thereby facilitating convection of the outside air and the air inside the box body 1 through the vent pipe 601, and achieving heat dissipation, compared with the adjustment cap 602 which is directly rotated out, the adjustment cap 602 is not easily lost while ensuring the heat dissipation effect, when the refrigeration plate 17 is required to reduce the temperature inside the box body 1, in order to reduce the influence of convection of the outside high-temperature gas and the inside low-temperature gas inside the box body 1 on the temperature inside the box body 1, the adjustment cap 602 is rotated in, so that the inside of the vent groove 603 is not communicated with the inside of the vent pipe 601, thereby reducing the convection phenomenon of the outside high-temperature gas and the inside low-temperature gas inside the box body 1, and being beneficial to reducing the temperature inside the box body 1 by the refrigeration plate 17.

The working principle is as follows: when the TWS Bluetooth headset storage device is used in detail, the refrigeration plate 17 and the adjusting cap 602 are not used in winter, so that the inside of the vent groove 603 is communicated with the inside of the vent pipe 601 through the inside of the adjusting cap 602, the convection between the outside air and the air inside the box body 1 is promoted through the vent pipe 601, the heat dissipation is realized, compared with the direct screwing-out of the adjusting cap 602, the adjusting cap 602 is not easily lost while the heat dissipation effect is ensured, when the refrigeration plate 17 is needed to reduce the temperature inside the box body 1, in order to reduce the influence of the convection of the outside high-temperature gas and the low-temperature gas inside the box body 1 on the temperature inside the box body 1, the adjusting cap 602 is screwed in first, so that the inside of the vent groove 603 is not communicated with the inside of the vent pipe 601, thereby reducing the phenomenon that the convection between the outside high-temperature gas and the low-temperature gas inside the box body 1 is performed, the temperature inside the box body 1 can be favorably reduced by the refrigerating plate 17, then the plurality of refrigerating pieces are started through the refrigerating piece switch, the plurality of refrigerating pieces can transfer the heat on one side of the refrigerating plate 17 to the other side of the refrigerating plate 17, so that the temperature of the air inside the auxiliary groove 7 is reduced, the temperature of the air inside the auxiliary shell 2 is improved, the auxiliary groove 7 is communicated with the inside of the box body 1, the temperature of the gas inside the box body 1 is reduced, the heat dissipation of the charging box is realized, compared with a heat dissipation mode through a heat conduction hole, the temperature difference between the outside air and the air inside the box body 1 is not depended on, a good heat dissipation effect is still realized in summer, meanwhile, dust cannot be introduced into the inside of the box body 1, the temperature of the air inside the auxiliary shell 2 can be gradually increased due to the work of the refrigerating pieces, the overhigh temperature can cause the burning of the refrigerating pieces, the heat dissipation effect of the air inside the auxiliary shell 2 is improved through the arranged auxiliary assembly 5, after charging for a period of time, the rotating disc 506 is rotated, the rotating disc 506 drives the transmission rod 503 to rotate, the transmission rod 503 drives the torsion spring 504 to rotate, the torsion spring 504 is tightened, the torsion spring 504 converts kinetic energy into elastic potential energy, the rotating disc 506 is loosened, the torsion spring 504 converts the elastic potential energy into kinetic energy, the torsion spring 504 drives the transmission rod 503 to rotate, the transmission rod 503 rotates to drive a plurality of push plates 505 to rotate around the transmission rod 503 as a circle center, air is stirred, air flow is accelerated, heat dissipation is performed on the inside of the auxiliary shell 2, the temperature of the heat dissipation surface side of the refrigeration sheet inside the refrigeration plate 17 is reduced, normal operation of the refrigeration sheet is facilitated, an iron sheet is fixedly arranged inside the lifting plate 13, a magnet sheet is fixedly arranged inside the fixing plate 15, when the box cover 8 needs to be opened, the rubber anti-slip block 14 is pressed by fingers, the lifting plate 13 attached to the top end of the fixing plate 15 is separated from the fixing plate 15, the middle of the rubber anti-slip block 14 is recessed, finger slip is avoided, the lifting plate is facilitated to move the lifting plate 13, and the box cover 8 is attached to the fixing plate 15, and the box cover is convenient to be closed, and the box cover 8 is convenient to be closed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a TWS bluetooth headset storage device, includes box body (1), its characterized in that, one side of box body (1) is fixed to be equipped with supplementary shell (2), air inlet (3) have all been seted up at the front and the back of supplementary shell (2), two the inner wall of air inlet (3) is all fixed to be equipped with first dust screen (4), mounting groove (16) have been seted up to one side of supplementary shell (2), the inner wall of mounting groove (16) is fixed to be equipped with refrigeration board (17), the inside of refrigeration board (17) is fixed to be equipped with a plurality of refrigeration piece, and the heat absorption face of a plurality of refrigeration piece all towards the inside of box body (1), supplementary groove (7) that are linked together with the inside of box body (1) are seted up to one side of box body (1), the fixed surface of the inner wall of supplementary groove (7) and refrigeration board (17) is connected, the opposite side of supplementary shell (2) is equipped with auxiliary assembly (5), the opposite side of box body (1) is equipped with subassembly (6) of ventilating.

2. A TWS Bluetooth headset receiving apparatus according to claim 1, wherein: the auxiliary assembly (5) comprises an installation barrel (501), the installation barrel (501) is fixedly arranged on the other side of the auxiliary shell (2), a first through hole (502) is formed in one end of the installation barrel (501), a transmission rod (503) is connected to the inner wall of the first through hole (502) in a sliding mode, a turntable (506) is fixedly arranged at one end of the transmission rod (503), the other end of the transmission rod (503) penetrates through the other side of the auxiliary shell (2) and is arranged inside the auxiliary shell (2), a torsion spring (504) and a plurality of push plates (505) are fixedly arranged on the surface of the transmission rod (503) respectively, the torsion spring (504) is arranged inside the installation barrel (501), the surface of the torsion spring (504) is fixedly connected with the inner wall of the installation barrel (501), the push plates (505) are uniformly distributed in an annular mode, and the push plates (505) are arranged inside the auxiliary shell (2).

3. A TWS Bluetooth headset receiving apparatus according to claim 2, wherein: the surface fixing of transfer line (503) is equipped with two spacing rings (10), two the one end of spacing ring (10) all is fixed and is equipped with two stopper (11), four the vertical cross-section of stopper (11) is semi-circular, wherein two the surface of stopper (11) and the inner wall sliding connection of installation section of thick bamboo (501) one end, two in addition the surface of stopper (11) and the opposite side sliding connection of auxiliary housing (2).

4. A TWS bluetooth headset receiving device according to claim 2, wherein: and a second through hole (12) is formed in the other side of the auxiliary shell (2), and the inner wall of the second through hole (12) is connected with the surface of the transmission rod (503) in a sliding manner.

5. A TWS bluetooth headset receiving device according to claim 1, wherein: the ventilation assembly (6) comprises a ventilation pipe (601), the ventilation pipe (601) is fixedly arranged on the other side of the box body (1), the inside of the ventilation pipe (601) is communicated with the inside of the box body (1), external threads are fixedly arranged on the surface of the ventilation pipe (601), a second dustproof net (604) is fixedly arranged on the inner wall of the ventilation pipe (601), an adjusting cap (602) is connected to the surface of the ventilation pipe (601) in a threaded manner, two ventilation grooves (603) are formed in the surface of the adjusting cap (602), and the insides of the two ventilation grooves (603) are communicated with the inside of the adjusting cap (602).

6. A TWS bluetooth headset receiving device according to claim 1, wherein: the fixed battery that is equipped with in inside of box body (1), the top of box body (1) articulates there is lid (8), the fixed board (13) that lifts that is equipped with in front of lid (8), the fixed iron sheet that is equipped with in inside of lifting board (13), the bottom mounting that lifts board (13) is equipped with rubber non slipping spur (14), just the middle part of rubber non slipping spur (14) is sunken, the front of box body (1) is fixed respectively and is equipped with flush mounting plate of switch (9) and fixed plate (15), the fixed magnet piece that is equipped with in inside of fixed plate (15), the top of fixed plate (15) and the bottom sliding connection of lifting board (13).

7. A TWS Bluetooth headset receiving device according to claim 6, wherein: the surface of flush mounting plate of switch (9) is equipped with the refrigeration piece switch, and a plurality of refrigeration piece all through refrigeration piece switch and battery electric connection.

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