Low noise hidden air outlet

Abstract

The application relates to a low-noise hidden air outlet, which comprises an air duct shell, a first blade assembly arranged in the air duct shell and used for adjusting up and down air directions, a second blade assembly arranged in the air duct shell and used for adjusting left and right air directions, and a knob assembly slidingly installed on the first blade assembly; the knob assembly is provided with a yoke for adjusting the second blade assembly; the second blade assembly is provided with an adjusting rod matched with the yoke; the yoke comprises a rotating part and a driving part; the adjusting rod is provided with a splicing part for splicing with the driving part; the driving part is provided with a splicing groove extending along a direction perpendicular to the length direction of the adjusting rod and used for arranging the splicing part; the upper end of the splicing part is provided with a first limiting part for limiting upward sliding of the yoke; and the lower end of the splicing part is provided with a second limiting part for limiting downward sliding of the yoke. The application has the effect of reducing the risk of noise caused by motion interference between the yoke and the rotating rod.

Description

Technical Field

[0001] This application relates to the field of vehicle air conditioning systems, and in particular to a low-noise concealed air outlet. Background Technology

[0002] The air vents of a car's air conditioning system are the terminal outlets of the system. Their core function is to deliver air, processed by the system, into the passenger compartment according to the needs of the occupants, in a specific direction and volume. In related technologies, the airflow direction adjustment of car air vents typically involves a fork structure driving longitudinal blades to swing left and right. However, when the fork rotates the blades, it can cause motion interference with the rotating rods on the longitudinal blades, even resulting in periodic collisions, which can easily generate impact noise and severely affect the user's driving experience. To address the aforementioned issues, the inventors believe there is a need to provide an air conditioning vent that generates impact noise. Utility Model Content

[0003] To reduce the risk of noise caused by motion interference between the shift fork and the rotating rod, this application provides a low-noise concealed air outlet.

[0004] The low-noise concealed air outlet provided in this application adopts the following technical solution:

[0005] A low-noise concealed air outlet includes a duct housing, a first blade assembly disposed in the duct housing for adjusting the up-down airflow direction, a second blade assembly disposed in the duct housing for adjusting the left-right airflow direction, and a toggle assembly slidably mounted on the first blade assembly. The toggle assembly has a fork for adjusting the orientation of the second blade assembly, and the second blade assembly is provided with an adjusting rod that cooperates with the fork. The fork includes a rotating part and a driving part connected to the rotating part and arranged facing the adjusting rod. The adjusting rod has a plug-in part for the driving part to plug into, and the driving part has a plug-in groove extending along the length direction perpendicular to the adjusting rod and for the plug-in part to be arranged. The upper end of the plug-in part is provided with a first limiting part for restricting the upward sliding of the fork, and the lower end of the plug-in part is provided with a second limiting part for restricting the downward sliding of the fork.

[0006] By adopting the above technical solution, when the vehicle air conditioning system is turned on, the operator can adjust the airflow direction of the air outlet by sliding the toggle assembly on the first blade assembly; by sliding the toggle assembly relative to the first blade assembly, the toggle fork moves and drives the adjusting rod to rotate, thereby rotating the second blade assembly, thus achieving left and right adjustment of the airflow direction of the air outlet; by turning the angle of the toggle assembly, the angle of the first blade assembly is adjusted, thereby achieving up and down adjustment of the airflow direction of the air outlet; when adjusting the airflow direction up and down, since the drive part of the toggle fork is inserted into the insertion part of the adjusting rod, the upper end face of the drive part always abuts against the first limiting part and the lower end face of the drive part always abuts against the second limiting part, which helps to reduce the risk of noise caused by the movement interference between the toggle fork and the rotating rod when adjusting the airflow direction.

[0007] Optionally, the first blade assembly includes a lateral adjustment blade rotatably mounted on the duct housing, a plurality of lateral driven blades rotatably mounted on the duct housing and rotating synchronously with the lateral adjustment blade, and a first connecting rod for connecting the lateral adjustment blade and the plurality of lateral driven blades; the lateral adjustment blade has a sliding connection portion for the toggle assembly to slide.

[0008] By adopting the above technical solution, the specific structure of the first blade assembly is disclosed. Rotating the transverse adjustment blade, under the connection of the first connecting rod, can drive several transverse driven blades to rotate synchronously, thereby realizing the adjustment of the up and down air direction of the air outlet; the sliding connection knob assembly can slide smoothly on the transverse adjustment blade, which is convenient for operation and adjustment.

[0009] Optionally, the second blade assembly includes a longitudinal adjusting blade rotatably mounted on the duct housing, a plurality of longitudinal driven blades rotatably mounted on the duct housing and rotating synchronously with the longitudinal adjusting blade, and a second connecting rod for connecting the longitudinal adjusting blade and the plurality of longitudinal driven blades; the longitudinal adjusting blade is provided with the adjusting rod, and the longitudinal adjusting blade has an adjusting channel on the side near the adjusting rod for arranging the insertion part.

[0010] By adopting the above technical solution, the specific structure of the second blade assembly is disclosed. Rotating the longitudinal adjusting blade, under the connection of the second connecting rod, can drive several longitudinal driven blades to rotate synchronously, thereby realizing the adjustment of the left and right wind direction of the air outlet. The setting of the adjusting rod and the adjusting channel provides space for the insertion part, making the cooperation between the fork and the adjusting rod smoother, thereby improving the stability and accuracy of adjusting the left and right wind direction.

[0011] Optionally, the number of longitudinal driven blades is not less than two and they are symmetrically arranged on both sides of the longitudinal adjusting blade; the two longitudinal driven blades located on adjacent sides of the longitudinal adjusting blade are provided with clearance grooves for the insertion part to be arranged.

[0012] By adopting the above technical solution, the number of longitudinal driven blades is no less than two and they are symmetrically arranged on both sides of the longitudinal regulating blade. The longitudinal driven blades on the adjacent sides are provided with clearance arc grooves for the insertion part of the regulating rod, which makes the structural layout more reasonable, provides space for the insertion part, further reduces the risk of noise caused by collision between the longitudinal driven blades and the insertion part, helps to ensure the smoothness of the adjustment process, and thus achieves effective adjustment of the left and right wind directions.

[0013] Optionally, the toggle assembly further includes a toggle body slidably arranged on the lateral adjustment blade, and a toggle base detachably mounted on the toggle body and used for rotational arrangement of the rotating part; the toggle body has a sliding groove extending along the length direction parallel to the lateral adjustment blade; the lateral adjustment blade has a guide ridge that cooperates with the sliding groove and is used to limit the sliding of the toggle assembly along the length direction parallel to the lateral adjustment blade.

[0014] By adopting the above technical solution, the toggle body cooperates with the guide protrusion through the sliding groove, so that the toggle assembly can slide stably on the lateral adjustment blade; the toggle base can be detachably installed on the toggle body, which facilitates the maintenance and replacement of the shift fork; the toggle base can provide space for the rotating part to rotate, so that the shift fork can better adjust the orientation of the second blade assembly.

[0015] Optionally, the number of guide ridges is two and they are symmetrically arranged on the upper and lower surfaces of the lateral adjustment blade.

[0016] By adopting the above technical solution, the two guide protrusions symmetrically arranged on the upper and lower surfaces of the transverse adjustment blade cooperate with the sliding groove of the dial body, which can better restrict the sliding of the dial assembly along the length direction parallel to the transverse adjustment blade, making the sliding of the dial assembly more stable and helping to further improve the accuracy and reliability of the adjustment operation.

[0017] Optionally, the toggle base has a rotating snap-fit ​​structure for rotatably arranging the rotating part, the rotating snap-fit ​​structure including a first rotating seat for arranging one end of the rotating part and a second rotating seat for arranging the other end of the rotating part; the rotating part is provided with a rotating limiting post at one end near the second rotating seat, which abuts against the outer end of the second rotating seat.

[0018] By adopting the above technical solution, the specific structure of the combination of the dial base and the dial fork is disclosed. The first rotating seat and the second rotating seat support the two ends of the rotating part respectively to ensure rotational stability. The rotation limiting post abuts against the outer end of the second rotating seat to limit the position of the rotating part, reducing the risk of the rotating part sliding along the length direction and colliding with the first rotating seat and the second rotating seat at both ends to generate noise. This helps to improve the reliability and accuracy of the rotation adjustment of the dial fork.

[0019] Optionally, the dial body is provided with a plurality of snap-fit ​​buckles on the opening side of the sliding through groove, and the dial base is provided with a plurality of snap-fit ​​grooves that are directly opposite to the plurality of snap-fit ​​buckles; one of the snap-fit ​​buckles near the rotating limiting post is provided with an abutting protrusion for the side of the rotating limiting post to abut against.

[0020] By adopting the above technical solution, the snap-fit ​​buckle of the dial body and the snap-fit ​​groove of the dial base cooperate to realize the detachable installation of the dial body and the dial base, which facilitates the assembly of the air outlet and subsequent maintenance; the snap-fit ​​buckle near the rotation limit post is provided with an abutment protrusion for the side of the rotation limit post to abut, which can limit the rotation of the dial fork, reduce the risk of the rotation part coming off the rotation snap-fit ​​structure, and thus ensure the stability of the air outlet air direction adjustment.

[0021] Optionally, the rotating part has a limiting structure that cooperates with the toggle base and is used to limit the maximum rotation angle of the toggle fork; the limiting structure includes an upper limit block for limiting the maximum upward adjustment angle of the toggle fork and a lower limit block for limiting the maximum downward adjustment angle of the toggle fork.

[0022] By adopting the above technical solution, the upper limit block and the lower limit block can accurately limit the rotation range of the shift fork, which helps to reduce the risk of excessive rotation of the shift fork and ensures that the shift fork adjusts the orientation of the second blade assembly within a reasonable angle range, which helps to improve the accuracy and stability of wind direction adjustment.

[0023] Optionally, the number of limiting structures is two, and they are symmetrically arranged on both sides of the rotating part.

[0024] By adopting the above technical solution, the two limiting structures symmetrically arranged on both sides of the rotating part can better limit the maximum upward adjustment angle and the maximum downward adjustment angle of the shift fork, making the rotation adjustment of the shift fork more stable and precise.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. A low-noise concealed air outlet, comprising a duct housing, a first blade assembly, a second blade assembly, and a toggle assembly; by sliding and adjusting the relative position of the toggle assembly to the first blade assembly, a toggle fork moves and drives an adjusting rod to rotate, thereby rotating the second blade assembly, thus achieving left-right adjustment of the air outlet direction; by adjusting the angle of the toggle assembly, the angle of the first blade assembly is adjusted, thereby achieving up-down adjustment of the air outlet direction; when adjusting the air direction up-down, since the driving part of the toggle fork is inserted into the insertion part of the adjusting rod, the upper end face of the driving part always abuts against the first limiting part and the lower end face of the driving part always abuts against the second limiting part, which helps to reduce the risk of noise caused by the toggle fork interfering with the rotating rod when adjusting the air direction;

[0027] 2. There are no fewer than two longitudinal driven blades, which are symmetrically arranged on both sides of the longitudinal regulating blade. The longitudinal driven blades on the adjacent sides are provided with clearance arc grooves for the insertion part of the regulating rod, which makes the structural layout more reasonable, provides space for the insertion part, further reduces the risk of noise caused by collision between the longitudinal driven blades and the insertion part, helps to ensure the smoothness of the regulation process, and thus achieves effective regulation of the left and right wind directions.

[0028] 3. The toggle body engages with the guide ridge through a sliding groove, enabling the toggle assembly to slide stably on the lateral adjustment blades; the toggle base is detachably mounted on the toggle body, facilitating the maintenance and replacement of the shift fork; the toggle base provides space for the rotating part to rotate, allowing the shift fork to better adjust the orientation of the second blade assembly. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the low-noise concealed air outlet in the embodiment of this application.

[0030] Figure 2 This is a schematic diagram of the structure of the first blade assembly in an embodiment of this application.

[0031] Figure 3 This is a schematic diagram showing the interaction between the lateral adjusting blade and the lateral driven blade with the first connecting rod in an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the structure of the second blade assembly in an embodiment of this application.

[0033] Figure 5 This is a cross-sectional schematic diagram of the cooperation between the lateral adjustment blade and the toggle assembly in an embodiment of this application.

[0034] Figure 6 This is a schematic diagram of the toggle assembly in an embodiment of this application.

[0035] Figure 7 yes Figure 4An enlarged schematic diagram of the adjustment rod and shift fork at point A.

[0036] Figure 8 yes Figure 2 An enlarged schematic diagram of the engagement between the rotating part at point B and the second rotating seat.

[0037] Explanation of reference numerals in the attached drawings: 1. Duct housing; 2. First blade assembly; 21. Lateral adjusting blade; 211. First transmission groove; 212. First transmission column; 213. Sliding connection; 214. Guide ridge; 22. Lateral driven blade; 221. Second transmission groove; 222. Second transmission column; 23. First connecting rod; 231. First transmission hole; 232. Second transmission hole; 3. Second blade assembly; 31. Longitudinal adjusting blade; 311. First extension; 312. Third transmission column; 313. Adjusting rod; 3131. Insertion part; 3132. First limiting part; 3133. First connecting part; 3134. Second limiting part; 3135. Second connecting part; 314. 1. Adjustment channel; 32. Longitudinal driven blade; 321. Second extension; 322. Fourth transmission column; 323. Clearance arc groove; 33. Second connecting rod; 331. Third transmission hole; 332. Fourth transmission hole; 4. Toggle assembly; 41. Toggle body; 411. Sliding through groove; 412. Snap-fit ​​buckle; 4121. Abutting protrusion; 42. Toggle base; 421. First rotating seat; 422. Second rotating seat; 423. Snap-fit ​​groove; 43. Toggle fork; 431. Rotating part; 4311. First snap-fit ​​post; 4312. Second snap-fit ​​post; 4313. Rotation limit post; 4314. Upper limit block; 4315. Lower limit block; 432. Drive part; 4321. Insertion groove. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0039] This application discloses a low-noise concealed air outlet. (Refer to...) Figure 1 The low-noise concealed air outlet includes a duct housing 1, a first blade assembly 2 arranged in the duct housing 1 for adjusting the up and down airflow direction, a second blade assembly 3 arranged in the duct housing 1 for adjusting the left and right airflow direction, and a toggle assembly 4 slidably mounted on the first blade assembly 2.

[0040] Reference Figure 2 and Figure 3The first blade assembly 2 includes a lateral adjusting blade 21 rotatably mounted on the duct housing 1, a plurality of lateral driven blades 22 rotatably mounted on the duct housing 1 and rotating synchronously with the lateral adjusting blade 21, and a first connecting rod 23 for connecting the lateral adjusting blade 21 and the plurality of lateral driven blades 22. In this embodiment, there are two lateral driven blades 22, symmetrically arranged on the upper and lower sides of the lateral adjusting blade 21. A first transmission groove 211 for arranging the first connecting rod 23 is provided on one side of the lateral adjusting blade 21, and a second transmission groove 221 opposite to the first transmission groove 211 is provided on the same side of the lateral driven blade 22. A first transmission column 212 extending parallel to the length direction of the lateral adjusting blade 21 is provided on the side wall of the first transmission groove 211 of the lateral adjusting blade 21. A second transmission column 222 extending parallel to the length direction of the lateral adjusting blade 21 is provided on the side wall of the second transmission groove 221 of the lateral driven blade 22. The first connecting rod 23 has a first transmission hole 231 for the first transmission column 212 to be rotatably arranged and a second transmission hole 232 for the second transmission column 222 to be rotatably arranged.

[0041] Reference Figure 4 The second blade assembly 3 includes a longitudinal adjusting blade 31 rotatably mounted on the duct housing 1, a plurality of longitudinal driven blades 32 rotatably mounted on the duct housing 1 and rotating synchronously with the longitudinal adjusting blade 31, and a second connecting rod 33 for connecting the longitudinal adjusting blade 31 and the plurality of longitudinal driven blades 32. In this embodiment, there are four longitudinal driven blades 32 arranged in pairs at parallel intervals on both sides of the longitudinal adjusting connecting rod. The lower end sidewall of the longitudinal adjusting blade 31 is provided with a first extension 311, and the lower end surface of the first extension 311 is provided with a third transmission column 312 extending parallel to the length direction of the longitudinal adjusting blade 31. The lower end of the longitudinal driven blade 32 is provided with a second extension 321 on the same side, and the lower end surface of the second extension 321 is provided with a fourth transmission column 322 extending parallel to the length direction of the longitudinal driven blade 32. The second connecting rod 33 has a third transmission hole 331 for the third transmission column 312 to be rotatably arranged and a fourth transmission hole 332 for the fourth transmission column 322 to be rotatably arranged.

[0042] Reference Figure 2 and Figure 5The toggle assembly 4 includes a toggle body 41 slidably arranged on the transverse adjustment blade 21, a toggle base 42 detachably mounted on the toggle body 41, and a toggle fork 43 rotatably mounted on the toggle base 42 for adjusting the orientation of the longitudinal adjustment blade 31. The transverse adjustment blade 21 has a sliding connection portion 213 for sliding the toggle body 41, and the toggle body 41 has a sliding through groove 411 slidably arranged on the sliding connection portion 213. The sliding connection portion 213 is provided with a guide ridge 214 that engages with the bottom surface of the sliding through groove 411 and restricts the toggle body 41 from sliding along a direction parallel to the length of the transverse adjustment blade 21. In this embodiment, there are two guide ridges 214, symmetrically arranged on the upper and lower end faces of the sliding connection portion 213.

[0043] Reference Figure 6 and Figure 7 The shift fork 43 includes a rotating part 431 and a driving part 432 connected to the rotating part 431 and arranged facing the longitudinal adjusting blade 31. The driving part 432 has a insertion groove 4321 extending along the length direction perpendicular to the longitudinal adjusting blade 31. The longitudinal adjusting blade 31 is provided with an adjusting rod 313 that mates with the insertion groove 4321. The adjusting rod 313 includes an insertion part 3131 for inserting the driving part 432, a first limiting part 3132 connected to the upper end of the insertion part 3131 and used to limit the upward sliding of the driving part 432, a first connecting part 3133 for connecting the first limiting part 3132 and the upper side of the longitudinal adjusting blade 31, a second limiting part 3134 connected to the lower end of the insertion part 3131 and used to limit the downward sliding of the driving part 432, and a second connecting part 3135 for connecting the second limiting part 3134 to the lower side of the longitudinal adjusting blade 31.

[0044] Reference Figure 4 and Figure 7 The longitudinal adjusting blade 31 has an adjusting channel 314 between the first connecting portion 3133 and the second connecting portion 3135 for the insertion portion 3131 to rotate. In this embodiment, the two longitudinal driven blades 32 located on adjacent sides of the longitudinal adjusting blade 31 each have a clearance arc groove 323 in the middle for the end of the insertion portion 3131 of the shift fork 43 to be arranged.

[0045] Reference Figure 6 and Figure 8The rotating part 431 has a first locking post 4311 at one end and a second locking post 4312 at the other end. The toggle base 42 has a rotating locking structure for arranging the rotating part 431, which includes a first rotating seat 421 for arranging the first locking post 4311 and a second rotating seat 422 for arranging the second locking post 4312. The rotating part 431 has a rotating limiting post 4313 at the outer end of the second locking post 4312, and the side of the rotating limiting post 4313 facing the second locking post 4312 abuts against the second rotating seat 422. The toggle body 41 has a plurality of locking buckles 412 on the opening side of the sliding through groove 411, and the toggle base 42 has a plurality of locking grooves 423 for the plurality of locking buckles 412 to engage one-to-one. Among them, the snap fastener 412 near the rotation limiting post 4313 is provided with an abutment protrusion 4121 for the side of the rotation limiting post 4313 to abut against.

[0046] Reference Figure 8 The rotating part 431 has a limiting structure for limiting the maximum adjustment angle of the shift fork 43. The limiting structure includes an upper limiting block 4314 for limiting the maximum upward adjustment angle of the shift fork 43 and a lower limiting block 4315 for limiting the maximum downward adjustment angle of the shift fork 43. In this embodiment, there are two sets of limiting structures, which are symmetrically arranged at both ends of the rotating part 431.

[0047] The implementation principle of a low-noise concealed air outlet in this application embodiment is as follows: When the vehicle air conditioning system is turned on, the operator can adjust the air outlet direction by sliding the toggle assembly 4 on the first blade assembly 2; by sliding the adjustment toggle assembly 4 relative to the first blade assembly 2, the toggle fork 43 moves and drives the adjustment rod 313 to rotate, thereby rotating the second blade assembly 3, thus achieving left and right adjustment of the air outlet direction; by turning the angle of the toggle assembly 4, the angle of the first blade assembly 2 is adjusted, thereby achieving up and down adjustment of the air outlet direction; when adjusting the air direction up and down, since the drive part 432 of the toggle fork 43 is inserted into the insertion part 3131 of the adjustment rod 313, the upper end surface of the drive part 432 always abuts against the first limiting part 3132 and the lower end surface of the drive part 432 always abuts against the second limiting part 3134, which helps to reduce the risk of noise caused by the movement interference between the toggle fork 43 and the rotating rod when adjusting the air direction.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-noise concealed air outlet, characterized in that, The system includes a duct housing (1), a first blade assembly (2) disposed in the duct housing (1) for adjusting the up and down wind direction, a second blade assembly (3) disposed in the duct housing (1) for adjusting the left and right wind direction, and a toggle assembly (4) slidably mounted on the first blade assembly (2); the toggle assembly (4) has a fork (43) for adjusting the orientation of the second blade assembly (3), and the second blade assembly (3) is provided with an adjusting rod (313) that cooperates with the fork (43); the fork (43) includes a rotating part (431) and a part connected to the rotating part (431) and facing the duct housing (2). A driving part (432) is arranged on an adjusting rod (313); the adjusting rod (313) has a plug-in part (3131) for the driving part (432) to be plugged in, and the driving part (432) has a plug-in groove (4321) extending along the length direction perpendicular to the adjusting rod (313) and for the plug-in part (3131) to be arranged; the upper end of the plug-in part (3131) is provided with a first limiting part (3132) for limiting the upward sliding of the shift fork (43), and the lower end of the plug-in part (3131) is provided with a second limiting part (3134) for limiting the downward sliding of the shift fork (43).

2. The low-noise concealed air outlet according to claim 1, characterized in that, The first blade assembly (2) includes a lateral adjustment blade (21) rotatably mounted on the air duct housing (1), a plurality of lateral driven blades (22) rotatably mounted on the air duct housing (1) and rotating synchronously with the lateral adjustment blade (21), and a first connecting rod (23) for connecting the lateral adjustment blade (21) and the plurality of lateral driven blades (22); the lateral adjustment blade (21) has a sliding connection portion (213) for the toggle assembly (4) to slide.

3. The low-noise concealed air outlet according to claim 1, characterized in that, The second blade assembly (3) includes a longitudinal adjusting blade (31) rotatably mounted on the air duct housing (1), a plurality of longitudinal driven blades (32) rotatably mounted on the air duct housing (1) and rotating synchronously with the longitudinal adjusting blade (31), and a second connecting rod (33) for connecting the longitudinal adjusting blade (31) and the plurality of longitudinal driven blades (32); the longitudinal adjusting blade (31) is provided with the adjusting rod (313), and the longitudinal adjusting blade (31) has an adjusting channel (314) for arranging the insertion part (3131) on the side near the adjusting rod (313).

4. A low-noise concealed air outlet according to claim 3, characterized in that, The number of longitudinal driven blades (32) is not less than two and they are symmetrically arranged on both sides of the longitudinal adjusting blade (31); the two longitudinal driven blades (32) located on adjacent sides of the longitudinal adjusting blade (31) are provided with clearance arc grooves (323) for the insertion part (3131) to be arranged.

5. A low-noise concealed air outlet according to claim 2, characterized in that, The toggle assembly (4) further includes a toggle body (41) slidably arranged on the transverse adjustment blade (21) and a toggle base (42) detachably mounted on the toggle body (41) and used for the rotation of the rotating part (431); the toggle body (41) has a sliding groove (411) extending along the length direction parallel to the transverse adjustment blade (21); the transverse adjustment blade (21) has a guide ridge (214) that cooperates with the sliding groove (411) and is used to limit the sliding of the toggle assembly (4) along the length direction parallel to the transverse adjustment blade (21).

6. A low-noise concealed air outlet according to claim 5, characterized in that, The guide ridges (214) are two in number and are symmetrically arranged on the upper and lower surfaces of the transverse adjustment blade (21).

7. A low-noise concealed air outlet according to claim 5, characterized in that, The toggle base (42) has a rotating snap-fit ​​structure for rotatably arranging the rotating part (431). The rotating snap-fit ​​structure includes a first rotating seat (421) for arranging one end of the rotating part (431) and a second rotating seat (422) for arranging the other end of the rotating part (431). The rotating part (431) is provided with a rotating limiting post (4313) at one end near the second rotating seat (422) that abuts against the outer end of the second rotating seat (422).

8. A low-noise concealed air outlet according to claim 7, characterized in that, The dial body (41) is provided with a plurality of snap fasteners (412) on the opening side of the sliding through groove (411), and the dial base (42) is provided with a plurality of snap slots (423) that are directly opposite to the plurality of snap fasteners (412); one of the snap fasteners (412) near the rotating limiting post (4313) is provided with an abutting protrusion (4121) for the side of the rotating limiting post (4313) to abut.

9. A low-noise concealed air outlet according to claim 5, characterized in that, The rotating part (431) has a limiting structure that cooperates with the toggle base (42) and is used to limit the maximum rotation angle of the toggle fork (43); the limiting structure includes an upper limit block (4314) for limiting the maximum upward adjustment angle of the toggle fork (43) and a lower limit block (4315) for limiting the maximum downward adjustment angle of the toggle fork (43).

10. A low-noise concealed air outlet according to claim 9, characterized in that, The number of limiting structures is two, and they are symmetrically arranged on both sides of the rotating part (431).

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