JP2016054464A - Microphone cover and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microphone cover which prevents input of wind noise to a microphone without lowering assembling workability, and prevents positional deviation of a windbreak material without requiring to allowing the windbreak material to have a special shape.SOLUTION: A microphone cover 12 includes: an outer element 30 having an outer cover opening 31; an inner element 40 which is arranged on a microphone body 16 side of the outer element 30 and has an inner cover opening; a resin body portion 20 integrally molded with a resin; and a windbreak sheet 50 which blocks the inner cover opening and acts as a windbreak material. The windbreak sheet 50 is built in the resin body portion 20 so as to sandwich both side surfaces in a thickness direction and to embed the outside of an outer peripheral edge. An opposite end to the microphone body 16 of the outer cover opening 31 is brought into communication with a side end of the microphone body 16 of the inner cover opening through the windbreak sheet 50.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a microphone cover having a cover opening for sound passage and a method for manufacturing the same.

  Conventionally, in the structure in which sound is passed through the cover opening of the microphone cover, wind noise may be input to the microphone through the cover opening. In particular, when a microphone is installed in a vehicle-mounted microphone, for example, when the microphone is installed near the instrument panel near the front seat of the front seat or on the panel section of an overhead console, the blower and microphone of the air conditioner are close to each other. Sound is easily input to the microphone. When wind noise is input to the microphone in this manner, erroneous recognition of voice may occur when the microphone is used as the voice input unit of the voice recognition device. In addition, when a microphone is used as a voice input unit of a hands-free call device, there is a possibility that a voice cannot be sensed accurately and a conversation cannot be established because the call transmission unit does not operate smoothly.

  Patent Document 1 describes a configuration in which a microphone and a windproof material are accommodated in a microphone case in a vehicle-mounted microphone device. In this configuration, a panel opening is formed in a panel portion as a microphone cover that closes the case opening of the microphone case, and a windproof material that is a urethane material is inserted into the panel opening. The windproof material is sandwiched between the microphone case and the panel portion via the microphone.

JP 2008-124701 A

  In the configuration described in Patent Document 1, since the panel portion and the windproof material are separate members, the assembly workability may be reduced. Moreover, it is necessary to form a windproof material in the special shape which has an insertion part inserted in panel opening. On the other hand, when the windproof material does not have the insertion portion, the windproof material may be displaced in the microphone case. As a result, abnormal noise may occur or the windproof material may be displaced from the opening and the effect of preventing wind noise input to the microphone may be reduced.

  An object of the present invention is to provide a microphone cover that can prevent wind noise from being input to the microphone without lowering the assembly workability, and can prevent the windproof material from being displaced without requiring a special shape for the windproof material. It is to realize a manufacturing method.

  A microphone cover according to the present invention includes an outer element having an outer cover opening, and an inner element having an inner cover opening disposed on the microphone side of the outer element, and a resin main body integrally formed of resin, A windproof sheet for closing the inner cover opening, the windproof sheet is provided in the resin main body so as to sandwich both sides of the windproof sheet in the thickness direction and fill the outer periphery of the windproof sheet. The end of the outer cover opening opposite to the microphone communicates with the microphone end of the inner cover opening via the windproof sheet.

  A method of manufacturing a microphone cover according to the present invention includes an outer element having an outer cover opening and an inner element having an inner cover opening disposed on the microphone side of the outer element, and is integrally molded with resin. And a windproof sheet for closing the inner cover opening, the windproof sheet built in the resin main body so as to sandwich the outer peripheral edge of the windproof sheet with both side surfaces in the thickness direction of the windproof sheet interposed therebetween And the end of the outer cover opening opposite to the microphone communicates with the microphone end of the inner cover opening via the windproof sheet. The method for manufacturing a microphone cover according to the present invention includes a step of placing the windproof sheet on the inner element so as to close the inner cover opening on the periphery of the inner cover opening after the inner element is molded. By flowing the molten resin, the molten resin presses the outer peripheral edge of the windproof sheet from above, and the molten resin is solidified by regulating the flow of the molten resin so as to fill the outer periphery of the windproof sheet. Forming the outer element;

  According to the microphone cover and the method of manufacturing the same according to the present invention, it is possible to prevent wind noise from being input to the microphone without reducing the assembly workability, and the position of the windproof material without requiring a special shape for the windproof material. A microphone cover that can prevent displacement can be realized.

It is a perspective view which shows the microphone cover of embodiment which concerns on this invention. It is a perspective view which isolate | separates and shows the microphone cover shown in FIG. 1 to a some component. FIG. 3 is a view of the inner element shown in FIG. 2 as viewed from above in FIG. 2. FIG. 3A shows a state in which the resin for forming the outer element is injected from the gate for resin ejection while the windproof sheet is placed on the sheet arrangement plate portion of the inner element when the microphone cover of FIG. 1 is manufactured. It is sectional drawing. It is a perspective view which shows the comparative example of a microphone cover. It is a perspective view which shows the inner side element in the microphone cover of another example of embodiment which concerns on this invention. 1 shows the flow of the resin for forming the outer element when the microphone cover shown in FIG. 1 is manufactured. FIG. 3A is a view corresponding to a portion B in FIG. 3, and FIG. Yes, (c) is a diagram corresponding to part D of FIG. 6 shows the flow of the resin for forming the outer element when the microphone cover shown in FIG. 6 is manufactured, (a) is an enlarged view corresponding to part E of FIG. 7, and (b) is a corresponding view of part F in FIG. (C) is a diagram corresponding to the D part in FIG. 3. It is a figure which shows the state at the time of resin molding of an inner side element in the microphone cover of 2nd example of another example of embodiment which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Hereinafter, a case where the microphone cover has two cover openings will be described. However, only one cover opening or three or more cover openings may be formed in the microphone cover. The materials, quantities, and the like described below are illustrative examples and can be changed depending on the specifications of the microphone cover and the microphone device. In the following description, similar elements are denoted by the same reference numerals in all drawings.

  FIG. 1 is a perspective view showing a microphone cover 12 of the embodiment. FIG. 2 is a perspective view showing the microphone cover 12 separated into a plurality of components. 3 is a view of the inner element 40 shown in FIG. 2 as viewed from above in FIG.

  The microphone cover 12 constitutes the microphone device 10 together with the microphone case 13 and the microphone body 16. The microphone device 10 is mounted on a vehicle at the time of use, and is disposed in the vicinity of the instrument panel on the front side of the front seat or in the panel portion of the overhead console. In such an arrangement state, the microphone main body 16 is arranged near the blower of the vehicle air conditioner, and therefore wind noise is easily input to the microphone main body 16 as a blower sound. The microphone cover 12 of the present embodiment is particularly intended to prevent such wind noise input. Note that the microphone device including the microphone cover of the present invention may be arranged other than the vehicle to prevent wind noise input.

  The microphone case 13 has one end in the height direction H (lower end in FIG. 1) closed by the bottom plate portion 14 and a case opening 15 at the other end in the height direction H (upper end in FIG. 1). FIG. 1 shows a state in which the case opening 15 is not covered with the microphone cover 12 before the microphone cover 12 is attached to the microphone case 13. 1 to 3 show a height direction H, a length direction L, and a width direction W as three axial directions orthogonal to each other. The length direction L and the width direction W coincide with the length direction and the width direction of the outer element 30, respectively.

  Part of the microphone cover 12 and the microphone main body 16 are accommodated in the microphone case 13. The microphone main body 16 has a voice input unit for inputting voice, and transmits a voice signal to the outside through a signal line (not shown).

  The microphone cover 12 covers the case opening 15 of the microphone case 13. The microphone cover 12 includes a resin main body 20 integrally formed of resin and a windproof sheet 50 as a windproof material. The microphone cover 12 is called a “microphone bezel”.

  As shown in FIG. 2, the resin main body 20 includes an outer element 30 and an inner element 40, and is integrally formed of resin. The inner element 40 is disposed on the microphone body 16 side of the outer element 30.

  The outer element 30 has two outer cover openings 31 for passing sound that penetrate in the height direction H. Each outer cover opening 31 is formed in a shape having arcuate portions at two corners of a rectangle. Each outer cover opening 31 is formed such that two right-angled corner sides face inward. Accordingly, the outer element 30 has a shape in which an elliptical opening is separated into two outer cover openings 31 by an intermediate straight portion 32. The outer element 30 is disposed outside the microphone case 13. The outer surface of the outer element (the upper surface in FIGS. 1 and 2) is a design surface on which a design is applied, and is exposed to the outside of the microphone case 13 (upper side in FIG. 1) when used.

  The outer element 30 is solidified by flowing a molten resin on the sheet arrangement plate portion 41 in a state where a windproof sheet 50 (described later) is placed on the sheet arrangement plate portion 41 of the inner element 40 described later so as to close the inner cover opening 44. It is formed by letting. As a result, the outer element 30 is integrally formed with the inner element 40.

  The inner element 40 includes a substantially rectangular sheet arrangement plate portion 41 and two plate-like projecting portions 45. As shown in FIG. 3, in the sheet arrangement plate portion 41, a curved chamfer 42 having an arcuate cross section is formed at three corner portions P2, P3, P4 among the four corner portions P1, P2, P3, P4. Is done. In the sheet arrangement plate portion 41, a planar chamfer 43 is formed at the remaining one corner P1.

  The sheet arrangement plate part 41 has two sound-passing inner cover openings 44 that penetrate in the height direction H. Each inner cover opening 44 has the same shape as each outer cover opening 31 (FIG. 2) of the outer element 30. Further, the sheet arrangement plate portion 41 has a first rib Q1, a second rib Q2, and a third rib Q3 on the outer peripheral edge portion of the outer side surface (the upper side surface in FIG. 2, the front side surface in FIG. 3) that is the side surface opposite to the microphone case 13. Have The first rib Q1 is formed at a position closest to the gate G of the mold 70 used in resin injection molding, which will be described later, in the outer peripheral edge portion of the sheet arrangement plate portion 41 and facing the gate G. The Specifically, the first rib Q1 protrudes toward the outside of the microphone case 13 (the upper side in FIG. 2 and the front side in FIG. 3) at a portion corresponding to the corner P1 at the outer peripheral edge of the sheet arrangement plate portion 41. To do. The first rib Q1 includes three standing plate portions Q11, Q12, Q13 that are inclined and adjacent to each other. The intermediate vertical plate portion Q11 is positioned on the chamfer 43, and the vertical plate portions Q12 and Q13 on both sides are positioned on the outer peripheral edge portion of the sheet arrangement plate portion 41 that is out of the chamfer 43.

  The second rib Q2 and the third rib Q3 protrude toward the outside of the microphone case 13 on the two linear outer peripheral edges on the side opposite to the gate G in the sheet arrangement plate portion 41. The second rib Q2 and the third rib Q3 are used for positioning a windproof sheet 50 described later. Thus, the first rib Q1, the second rib Q2, and the third rib Q3 are formed only in a part of the outer peripheral edge of the inner element 40 in the circumferential direction.

  The two plate-like projecting portions 45 project in parallel with each other toward the inside of the microphone case 13 (the lower side in FIG. 2) at both ends in the length direction L of the sheet arrangement plate portion 41. For example, reinforcing ribs extending in the height direction H may be formed on the outer surface of each plate-like protrusion 45. The two inner cover openings 44 are formed so that the two right-angled corner sides are arranged inside. Accordingly, the sheet arrangement plate portion 41 has a shape in which an elliptical opening is separated into two inner cover openings 44 by an intermediate straight portion 46. Each inner cover opening 44 of the inner element 40 faces the outer cover opening 31 of the outer element 30 in the height direction H through the windproof sheet 50 and communicates with the outer cover opening 31.

  Each plate-like protrusion 45 has a rectangular hole 45a at the tip. Each hole 45 a is engaged with a projection (not shown) formed in the microphone case 13 when the microphone cover 12 is attached to the microphone case 13. As a result, the microphone cover 12 can be prevented from coming off from the microphone case 13.

  The windproof sheet 50 is built in the resin main body 20 so that the inner element 40 and the outer element 30 sandwich both sides in the thickness direction (vertical direction in FIG. 2) and fill the outer periphery. The windproof sheet 50 is formed in a substantially rectangular shape and has a linear chamfer 51 corresponding to the chamfer 43 of the sheet arrangement plate portion 41 constituting the inner element 40. The windproof sheet 50 is formed of a woven fabric of synthetic fibers such as polyester. Thereby, in each inner cover opening 44 of the inner element 40, the outer end (the upper end in FIG. 2) opposite to the microphone main body 16 is closed by the windproof sheet 50. Further, the outer end (upper end in FIG. 2) of each outer cover opening 31 of the outer element 30 communicates with the inner end (lower end in FIG. 2) that is the end on the microphone body 16 side of the inner cover opening 44 through the windproof sheet 50. ing.

  Such a microphone cover 12 is manufactured by the following manufacturing method. First, the inner element 40 having a predetermined shape shown in FIG. 2 is formed by first-stage injection molding of resin. After forming the inner element 40, the windproof sheet 50 is placed on the periphery of the inner cover opening 44 on the sheet arrangement plate portion 41 of the inner element 40 so as to close each inner cover opening 44. The chamfer 51 of the windproof sheet 50 is arranged on the same corner P <b> 1 as the chamfer 43 of the sheet arrangement plate part 41. In this state, the inner element 40 and the windproof sheet 50 are arranged in the mold 70 (FIGS. 3 and 4). An injection molding machine nozzle (not shown) is connected to the gate G formed in the mold 70. The gate G ejects molten resin into the mold 70. And the gate G is made to oppose the standing board part Q11 of the 1st rib Q1 of the sheet | seat arrangement | positioning board part 41. FIG.

  Next, as a second stage of injection molding, molten resin is ejected from the nozzle of the injection molding machine through the gate G into the mold 70 as indicated by an arrow α in FIG. Then, the molten resin ejected from the gate G presses the outer peripheral edge of the windproof sheet 50 from above and regulates the flow of the molten resin so as to fill the outer periphery of the windproof sheet 50 to solidify the molten resin. . As a result, the outer element 30 is formed integrally with the inner element 40. The restriction of the resin flow is realized by making the first rib Q1 face the gate G. Then, the molten resin is flowed on the sheet arrangement plate portion 41 to be solidified. In the injection molding of the resin, the flow of the molten resin is regulated by causing the first rib Q1 to face the gate G so that the molten resin gets over the first rib Q1 and covers the outer peripheral edge of the windproof sheet 50. . For this reason, it is possible to prevent the windproof sheet 50 from being turned up by the resin entering the windproof sheet 50 from the side of the windproof sheet 50. By such injection of molten resin, the outer element 30 is formed to have a predetermined shape shown in FIGS.

  At the time of resin injection, a part of the mold is disposed in a portion where the outer cover opening 31 of the outer element 30 is formed and a portion where the inner cover opening 44 of the sheet arrangement plate portion 41 is formed. Thereby, the cover openings 31 and 44 are formed. For this reason, the outer element 30 is integrally formed with the inner element 40 to form the resin main body 20. Further, the microphone cover 12 is formed by the resin main body 20 and the windproof sheet 50. The microphone cover 12 is taken out from the mold 70 and combined with the microphone case 13 and the microphone body 16 to form the microphone device 10.

  According to the microphone cover 12 and the manufacturing method thereof, the resin main body portion 20 sandwiches the both sides in the thickness direction of the windproof sheet 50 with the resin main body portion 20 and fills the outside of the outer peripheral edge of the windproof sheet 50. A windproof sheet 50 is incorporated in the interior. Therefore, it is possible to realize the microphone cover 12 that can prevent wind noise from being input to the microphone body 16 and can prevent the windproof sheet 50 from being displaced without requiring a special shape for the windproof material. In addition, since the windproof sheet 50 is built in the microphone cover 12, it is possible to realize a structure that can prevent wind noise from being input to the microphone body 16 simply by assembling the microphone cover 12 to the microphone case 13. For this reason, unlike the case where the microphone cover and the windproof material are separated from each other and assembled to the microphone case, the assembly workability is not lowered. Further, since the positional deviation of the windproof sheet 50 can be prevented, the rattling of the windproof sheet 50 can be prevented.

  FIG. 5 is a perspective view showing a comparative example of the microphone cover 12. The comparative example includes an outer panel 60 that becomes a design side by resin, and a plurality of standing plate portions 61 and 62 that protrude from the inner side surface (back side surface in FIG. 5) of the outer panel 60. A plurality of openings 63 are formed in the outer panel 60, and sound passes through the openings 63 and is input to the microphone body 16 (see FIG. 1) disposed inside the microphone cover 12. In such a comparative example, each opening 63 is not blocked by a windproof material. For this reason, wind noise may be input to the microphone body through the opening 63. According to the embodiment shown in FIGS. 1 to 4, such inconvenience can be prevented.

  Further, as a second example of a comparative example of the microphone cover (not shown), a configuration including two main body elements formed of resin and separable is also conceivable. In this configuration, two main body elements are joined by an engaging portion formed by a concave portion and a convex portion to form a main body portion. The windproof sheet 50 is sandwiched between the two main body elements. However, in this configuration, the two main body elements are displaced from each other due to the inevitable gap between the concave portion and the convex portion, and the windproof sheet 50 is easily displaced from the desired position. In the embodiment shown in FIG. 1 to FIG. 4, the resin main body 20 sandwiches both sides in the thickness direction of the windproof sheet 50 and fills the outside of the outer peripheral edge of the windproof sheet 50. Can be prevented.

  Further, in the embodiment of FIGS. 1 to 4, the outer element 30 is arranged so that the outer peripheral edge portion of the windproof sheet 50 is pressed in a state where the windproof sheet 50 is placed on the sheet arrangement plate portion 41 formed in a predetermined shape. It is formed by flowing a molten resin on the plate portion 41 and solidifying it. Accordingly, since the resin flow around the windproof sheet 50 can be easily controlled, it is possible to prevent the windproof sheet 50 from moving from a desired position due to the resin flow when the outer element 30 is formed. Therefore, the structure which covers all the opening area of each inner side cover opening 44 of the inner side element 40 with the windproof sheet 50 is easily realizable.

  FIG. 6 is a perspective view showing the inner element 40 in the microphone cover 12 of another example of the embodiment according to the present invention. In this example, on the outer side surface (upper side surface of FIG. 6) of the sheet arrangement plate portion 41 of the inner element 40, the entire peripheral rib T is formed so as to protrude in the entire circumferential direction of the outer peripheral edge portion. Then, the outer element 30 (see FIGS. 1 and 2) is integrally molded outside the inner element 40 (upper side in FIG. 6) by resin injection molding in a state where the windproof sheet 50 is placed on the sheet arrangement plate portion 41. Other configurations and operations are the same as those shown in FIGS.

  Next, a simulation performed for obtaining a preferable formation range of ribs in the sheet arrangement plate portion 41 will be described. In the simulation, in the configuration shown in FIGS. 1 to 4 (hereinafter referred to as the first embodiment) and the configuration shown in FIG. 6 (hereinafter referred to as the second embodiment), the outer element 30 (see FIGS. 1 and 4). The resin flow on the sheet arrangement plate portion 41 of the inner element 40 in the case of forming 2) was obtained. In the simulation, the resin ejected from the gate G (FIGS. 3 and 4) in each of the first and second embodiments reaches each corner P1, P2, P3, and P4 of the sheet arrangement plate portion 41. The resin flow at the time was determined. And the resin flow in each corner part P1, P2, P3, P4 was compared in 1st Example and 2nd Example.

  FIG. 7 shows the flow of the resin for forming the outer element 30 during the manufacture of the first embodiment. (A) is a diagram corresponding to part B in FIG. 3, and (b) is part C in FIG. FIG. 4C is a correspondence diagram, and FIG. 3C is a diagram corresponding to part D in FIG. 3. FIG. 8 shows the flow of the resin for forming the outer element 30 during the manufacture of the second embodiment. FIG. 8A is an enlarged view corresponding to part E in FIG. 7, and FIG. FIG. 4C is a diagram corresponding to a part D of FIG. 3.

  In the first and second embodiments, a curved chamfer 43a having an arcuate cross section is formed at the corner P1 of the sheet arrangement plate 41 of the inner element 40 facing the gate G. Further, at the corner of the windproof sheet 50 on the gate G (FIG. 3, FIG. 4) side, a stepped portion 57 is formed as shown in FIG. 7A instead of the chamfer 51 (FIG. 2). In the first embodiment shown in FIG. 7, the first rib U <b> 1 is formed in the portion of the sheet arrangement plate portion 41 that faces the gate G. The first rib U1 includes a curved surface portion U11 having an arc cross section facing the gate G at the outer peripheral edge of the outer surface of the sheet arrangement plate portion 41, and standing plate portions U12 and U13 on both sides thereof.

  In the second embodiment shown in FIG. 8, the entire peripheral rib T is formed over the entire periphery at the outer peripheral edge of the outer surface of the sheet arrangement plate portion 41. 7 and 8, the outer peripheral edge of the windproof sheet 50 is indicated by a thick solid line, and the inner side of the windproof sheet 50 is indicated by sand. In addition, the resin flow forming the outer element 30 is indicated by the hatched portion V. The flow of the resin injected from the gate G passes from the corner P1 through the corner P2 or the corner P3 and reaches the corner P4, or from the corner P1 through the portion forming the linear portion 32 to the corner. Part P4 is reached.

  As shown in FIGS. 7A and 8A, at the corner P1 on the gate G side on the sheet arrangement plate 41, the resin flows in the same manner as in the first and second embodiments. The resin covers the corners of the windproof sheet 50 in the same manner.

  In the first embodiment of FIG. 7B, the resin flows to the second corner P <b> 2 of the windproof sheet 50, and the resin flowing inside the sheet arrangement plate portion 41 is the outer peripheral edge of the sheet arrangement plate portion 41. It flows faster than the resin flowing through the part. For this reason, resin can be poured while pressing the outer peripheral edge of the windproof sheet 50 from above, and the windproof sheet 50 is not moved by being pressed by the resin. On the other hand, in the second embodiment of FIG. 8B, the resin flows into the second corner P3 of the windproof sheet 50 as in FIG. Resin flows quickly along the inner periphery and near the outer periphery. Accordingly, the resin flowing through the outer peripheral edge of the sheet arrangement plate portion 41 flows faster than the resin flowing inside.

  In the first embodiment of FIG. 7C, the resin flows to the last corner P4 on the opposite side of the gate G, and the resin that flows on the inner side of the resin that flows on the outer peripheral edge of the sheet arrangement plate 41 is used. Is flowing fast. Also in this case, as in the case of FIG. 7B, the windproof sheet 50 is not moved by being pushed by the resin. On the other hand, in the second embodiment of FIG. 8C, the resin flowing through the outer peripheral edge of the sheet arrangement plate portion 41 flows faster than the resin flowing inside, more clearly than in FIG. Resin is connected to the entire circumference at the part. On the other hand, the resin does not flow completely on the windproof sheet 50. Accordingly, it is more difficult to control the resin flow than the first embodiment so that the entire circumferential direction of the outer peripheral edge of the windproof sheet 50 is covered with the outer element 30. Therefore, as in the first embodiment, the outer surface of the sheet arrangement plate portion 41 is formed not only on the entire circumferential direction of the outer peripheral edge but on only a part of the circumferential direction including the portion closest to the gate G. Is preferred. In addition, after FIG.7 (c) and FIG.8 (c), resin flows finally so that the resin which finally forms the outer element 30 may fill the outer periphery of the outer periphery of the wind-proof sheet 50 over the perimeter.

  2, 3, and 6, all four corner portions P <b> 1, P <b> 2, P <b> 3, and P <b> 4 are planar in the same manner as the corner portion P <b> 1 in FIG. 3. A chamfer may be formed.

  Further, in each of the embodiments described above, the configuration in which the windproof sheet 50 is built in the resin main body 20 simultaneously with the resin molding of the outer element 30 after the inner element 40 is molded has been described. On the other hand, you may comprise so that the windbreak sheet | seat 50 may be incorporated at the time of resin molding of the inner side element 40. FIG. For example, FIG. 9 shows a state of the inner element 40 during resin molding in the microphone cover of the second example of another example of the embodiment of the present invention. A mold 71 used for resin molding includes a lower mold 71a and an upper mold 71b. In the lower die 71a, the windproof sheet 50 is placed on the upper end surface of the portion of the inner cover opening 44 that forms the microphone body 16 side (lower side in FIG. 9), and the lower end surface of the upper die 71b and the upper end surface of the lower die 71a. The windproof sheet 50 is disposed in the mold 71 so as to sandwich the windproof sheet 50 therebetween. The lower end surface of the upper mold 71b that contacts the windproof sheet 50 is the lower end surface of the portion that forms the opposite side of the inner cover opening 44 from the microphone body 16 (upper side in FIG. 9). In this state, resin is ejected from the gate G into the cavity 72 of the mold 71 so that both sides in the thickness direction of the windproof sheet 50 are sandwiched between the molten resin and the outside of the outer peripheral edge of the windproof sheet 50 is buried. Regulate resin flow. And the inner element 40 is shape | molded by this. After forming the inner element 40, the inner element 40 is taken out from the mold 71, and the outer element 30 is separated from the inner element 40 so that the outer element 30 is integrally formed with the inner element 40 in the same manner as shown in FIGS. Molded with a mold. According to such a configuration, it is not necessary to form a rib such as the rib Q1 (FIG. 2) on the inner element 40. On the other hand, there is a possibility that the pressure at the time of resin molding is applied to the windproof sheet 50 twice when the inner element 40 is formed and when the outer element 30 is formed. For this reason, from the viewpoint of improving the quality of the windproof sheet 50, the configuration shown in FIGS.

  G gate, P1, P2, P3, P4 corner, Q1 first rib, Q2 second rib, Q3 third rib, Q11, Q12, Q13 Standing plate portion, T full circumference rib, U1 first rib, U11 curved surface portion , U12, U13 Stand plate portion, V resin flow, 10 microphone device, 12 microphone cover, 13 microphone case, 14 bottom plate portion, 15 case opening, 16 microphone body, 20 resin body portion, 30 outer element, 31 outer cover opening, 32 Straight part, 40 Inner element, 41 Sheet placement plate part, 42 Chamfer, 43, 43a Chamfer, 44 Inner cover opening, 45a hole, 46 Straight part, 50 Windproof sheet, 51 Chamfer, 57 Step part, 60 Outer panel, 61 , 62 Standing plate part, 63 opening, 70 mold, 71 mold, 71a lower mold, 71b upper mold.

Claims (3)

An outer element having an outer cover opening, and an inner element having an inner cover opening disposed on the microphone side of the outer element, and a resin main body integrally formed of resin;
A windproof sheet for closing the inner cover opening, sandwiching both side surfaces in the thickness direction of the windproof sheet and embedded in the outer periphery of the outer peripheral edge of the windproof sheet; Prepared,
A microphone cover, wherein an end of the outer cover opening opposite to the microphone communicates with the microphone end of the inner cover opening via the windproof sheet. An outer element having an outer cover opening; an inner element having an inner cover opening disposed on the microphone side of the outer element; a resin main body integrally formed of resin; and a windproof sheet for closing the inner cover opening A windproof sheet built in the resin main body so as to sandwich both sides of the windproof sheet in the thickness direction and fill the outside of the outer peripheral edge of the windproof sheet, and the microphone of the outer cover opening The opposite end is a method of manufacturing a microphone cover that communicates with the microphone side end of the inner cover opening through the windproof sheet,
After the inner element is molded, the molten resin is allowed to flow over the inner element in a state where the windproof sheet is placed on the periphery of the inner cover opening so as to close the inner cover opening. A method for manufacturing a microphone cover, wherein the outer element is formed by pressing a peripheral edge from above and restricting a flow of the molten resin so as to fill an outer periphery of the windproof sheet and solidifying the molten resin. In the manufacturing method of the microphone cover according to claim 2,
The inner element includes a rib that is formed only in a part of the outer peripheral edge in the circumferential direction and protrudes toward the outer element side,
When forming the outer element, the inner element and the windproof sheet are disposed in the mold so that the rib faces the gate for injecting the molten resin into the mold, and the molten resin gets over the rib to A method for manufacturing a microphone cover, wherein the flow of a molten resin is regulated so as to cover an upper side of a peripheral portion of a windproof sheet.

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