Microspeaker Module having Duct Communicating with Vent Hole

Patent metadata

Field	Value
Publication number	US-2021392432-A1
Application number	US-202117344282-A
Country	US
Kind code	A1
Filing date	Jun 10, 2021
Priority date	Jun 12, 2020
Publication date	Dec 16, 2021
Grant date	—

Abstract

Provided is a microspeaker module having a duct communicating with a back volume vent hole. The microspeaker module includes a case, a microspeaker, and a circuit part and is mounted in a multimedia device to generate sound. The microspeaker includes a back volume communicating with a rear of the microspeaker and defined by the case, a vent hole formed in the case and configured to allow air to flow into and out of the back volume, and a duct connected to the vent hole to increase a path of air flowing to the vent hole.

First claim

What is claimed is:

1 . A microspeaker module including a case, a microspeaker, and a circuit part and mounted in a multimedia device to generate sound, the microspeaker comprising:
a back volume communicating with a rear of the microspeaker and defined by the case; a vent hole formed in the case and configured to allow air to flow into and out of the back volume therethrough; and a duct connected to the vent hole to elongate a path of air flowing to the vent hole.

2 . The microspeaker of claim 1 , wherein the duct is connected to the vent hole on one side and is branched into two or more ducts on an outer side.

3 . The microspeaker of claim 1 , wherein the duct is provided in the case and is defined by a film attached to a groove connected to the vent hole and the case.

4 . The microspeaker of claim 3 , wherein the groove extends from the vent hole so as to be branched into two or more grooves, and wherein the film seals at least one of the branched grooves to select a length of an effective ventilation duct.

5 . The microspeaker of claim 3 , wherein an end of the groove extends to an outer side than the film.

6 . The microspeaker of claim 1 , wherein the case includes a circular concave step portion around the vent hole, and wherein the duct is defined by a groove formed on an upper surface of the step portion and communicates with the vent hole and a film attached to an upper surface of the groove.

7 . The microspeaker of claim 6 , wherein an end of the groove extends to an outside of the circular step portion and is not covered by the film.

8 . The microspeaker of claim 1 , wherein the duct extends to surround the vent hole.

9 . The microspeaker of claim 1 , wherein the duct extends in zigzags to the outside of the vent hole to increase an effective length.

10 . The microspeaker of claim 1 , wherein the duct is provided on an outer surface of the case.

11 . The microspeaker of claim 1 , wherein the duct is provided on an inner surface of the case, and wherein air flowing in through the duct from the back volume flows into or out of the case through the vent hole.

Assignees

• Em Tech Co Ltd

Inventors

• Kim Ji Hoon
• Jeong In Ho
• Ha Jong Heon
• Kang Min Chul
• Lee Won Ki
• Kim Chi Kyun

Classifications

• H04R1/028 Primary

  associated with devices performing functions other than acoustics, e.g. electric candles · CPC title

• H04R2460/11

  Aspects relating to vents, e.g. shape, orientation, acoustic properties in ear tips of hearing devices to prevent occlusion · CPC title

• H04R2201/02

  Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups · CPC title

• H04R1/2849 Primary

  for loudspeaker transducers · CPC title