Speaker device

Abstract

To provide a speaker device that suppresses discomfort to vehicle occupants.SOLUTION: A speaker device according to an embodiment is a speaker device provided in a headrest of a vehicle seat. The speaker device includes a pair of speakers and a shaft. The shaft joins the back surfaces of the pair of speakers together. The pair of speakers are provided such that their back surfaces face each other. The shaft is held in the headrest via a fixing support.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a speaker device. [Background technology]

[0002] 2. Description of the Related Art Speaker devices mounted on headrests of vehicles are known (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-10771 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional speaker device, the vibration of the speaker may be transmitted to the headrest, causing the headrest itself to vibrate. Also, in the conventional speaker device, the vibration of the speaker may be transmitted to, for example, a shaft portion connecting the headrest and the backrest, causing rattle. Therefore, the conventional speaker device may cause discomfort to the passengers of the vehicle.

[0005] The present invention has been made in view of the above, and has an object to suppress discomfort felt by vehicle occupants. [Means for solving the problem]

[0006] A speaker device according to one aspect of the embodiment is a speaker device provided in a headrest of a vehicle seat. The speaker device includes a pair of speakers and a shaft. The shaft joins back surfaces of the pair of speakers to each other. The pair of speakers are provided such that their back surfaces face each other. The shaft is held by the headrest via a fixing support. Effect of the Invention

[0007] According to one aspect of the embodiment, the vibrations of the pair of speakers are transmitted to the shaft and canceled, thereby suppressing the transmission of vibrations to the headrest and suppressing the occurrence of rattle, thereby preventing discomfort to vehicle occupants. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view showing a portion of a vehicle. [Diagram 2] FIG. 2 is a schematic diagram illustrating the speaker device according to the first embodiment. [Diagram 3] FIG. 3 is a diagram illustrating the propagation of vibration in a speaker device according to a comparative example. [Figure 4] FIG. 4 is a diagram illustrating the propagation of vibration in the speaker device according to the first embodiment. [Diagram 5] FIG. 5 is a diagram showing a configuration of a speaker device according to the second embodiment. [Figure 6] FIG. 6 is a schematic diagram showing a configuration of a speaker device according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a speaker device according to an embodiment will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the present embodiment.

[0010] (First embodiment) The speaker device 1 according to the first embodiment is provided in a headrest 101 of a vehicle seat 100 of a vehicle, as shown in Fig. 1 and Fig. 2. Fig. 1 is a plan view showing a part of a vehicle. Fig. 2 is a schematic view explaining the speaker device 1 of the first embodiment. Fig. 2 is a view showing the inside of the headrest 101.

[0011] For example, the speaker device 1 is provided in the headrest 101 of the driver's seat and the passenger's seat 100. The speaker device 1 may be provided in the headrest 101 of one of the vehicle seats 100, the driver's seat and the passenger's seat. The speaker device 1 may also be provided in the headrest of a vehicle seat other than the driver's seat and the passenger's seat (rear seat).

[0012] In the following description, the front side of the user when the user is seated on the vehicle seat 100 is referred to as the front, and the rear side of the user is referred to as the rear. In addition, the right hand side of the user when the user is seated on the vehicle seat 100 is referred to as the right side, and the left hand side of the user is referred to as the left side. In addition, the vertical direction is referred to as the downward direction, and the direction opposite to the vertical direction is referred to as the upward direction.

[0013] The speaker device 1 includes a pair of speakers 2, a shaft 3, and a fixing post 4.

[0014] The speaker 2 includes a frame portion 5 and a driving portion 6. The frame portion 5 contains a diaphragm 5a, also called a cone. The driving portion 6 is provided on the opposite side of the diaphragm 5a from the sound emission direction. The driving portion 6 includes, for example, a voice coil, a magnetic circuit, and terminals. The driving portion 6 vibrates the diaphragm 5a of the frame portion 5 in response to an acoustic signal input to the speaker 2.

[0015] The speakers 2 are provided so that the sound emission direction of the diaphragm 5a is toward the outside of the headrest 101. For example, one of the pair of speakers 2 is provided so that the sound emission direction of the diaphragm 5a is toward the right of the headrest 101. The other of the pair of speakers 2 is provided so that the sound emission direction of the diaphragm 5a is toward the left of the headrest 101.

[0016] In this way, the pair of speakers 2 are provided so that the sound emission directions of each speaker 2 are opposite to each other. The pair of speakers 2 are also provided so that the rear faces 2a, which are the faces opposite to the sound emission direction, face each other. In other words, the pair of speakers 2 are provided so that the rear faces 2a face each other. The rear face 2a of the speaker 2 is the rear face of the drive unit 6, and is the face of the drive unit 6 on the opposite side to the frame unit 5. For example, the pair of speakers 2 are provided so that the rear faces 2a face each other in the left-right direction.

[0017] The pair of speakers 2 may be provided such that the sound emission direction of one speaker 2 faces forward and the sound emission direction of the other speaker 2 faces backward. That is, the pair of speakers 2 may be provided such that the rear surfaces 2a face each other in the front-rear direction. Also, a plurality of pairs of speakers 2 may be provided for one headrest 101.

[0018] The shaft 3 joins the rear surfaces 2a of the pair of speakers 2. The shaft 3 is provided to extend linearly. One end of the shaft 3 is joined to the rear surface 2a of one of the pair of speakers 2. The other end of the shaft 3 is joined to the rear surface 2a of the other of the pair of speakers 2.

[0019] The shaft 3 is made of, for example, an aluminum alloy, stainless steel, or brass. The shaft 3 may be made of a synthetic resin having high rigidity.

[0020] The fixing pillar 4 holds the shaft 3 and is fixed to the headrest 101. That is, the shaft 3 is held in the headrest 101 via the fixing pillar 4. The fixing pillar 4 is provided to extend in the vertical direction. The lower end of the fixing pillar 4 is attached to the headrest 101. The fixing pillar 4 may also be attached to the headrest 101 at its upper end. A hole 4a is formed in the fixing pillar 4. The shaft 3 is inserted into the hole 4a.

[0021] For example, the shaft 3 is held to the headrest 101 by two fixing struts 4. The two fixing struts 4 are provided on either side of a midpoint P of the shaft 3 in the extension direction of the shaft 3, for example, in the left-right direction. Specifically, the two fixing struts 4 are provided so as to be perpendicular to the shaft 3 and symmetrical with respect to a plane Q that passes through the midpoint P of the shaft 3.

[0022] It should be noted that the frame portion 5 of the speaker 2 is not held by the headrest 101. In other words, the speaker 2 is not directly held by the headrest 101, but is held by the headrest 101 via the shaft 3 and the fixing pole 4.

[0023] In a speaker device 200 according to a comparative example in which the rear faces 2a of a pair of speakers 2 are not joined together by the shaft 3, for example, as shown in Fig. 3, a frame portion 202 of a speaker 201 is fixed to a headrest 101. Note that in the speaker device 200 according to the comparative example, the frame portion 202 is fixed to the headrest 101 via a mounting member. Therefore, in the speaker device 200 according to the comparative example, vibrations caused by sounds of the speakers 201 are directly transmitted to the headrest 101. Fig. 3 is a diagram for explaining the transmission of vibrations in the speaker device 200 according to the comparative example.

[0024] In the speaker device 200 according to the comparative example, the vibration of the speaker 201 is directly transmitted to the headrest 101, so that the vibration of the headrest 101 becomes large. Also, in the speaker device 200 according to the comparative example, rattle occurs in the connection member 103 that connects the headrest 101 and the backrest part 102. Therefore, in the speaker device 200 according to the comparative example, the vibration of the headrest 101 and the rattle occurring in the connection member 103 may cause discomfort to the passenger.

[0025] In contrast, in the speaker device 1 according to the first embodiment, the rear faces 2a of the pair of speakers 2 are provided so as to face each other, and the rear faces 2a of the pair of speakers 2 are joined to each other by the shaft 3. Therefore, in the speaker device 1, as shown in FIG. 4, vibrations caused by the sound of the speakers 2 are propagated to the shaft 3. Then, the vibrations propagated from the speakers 2 to the shaft 3 cancel each other out, so that the speaker device 1 suppresses the vibrations propagated to the headrest 101. Also, in the speaker device 1, the generation of rattles in the connecting member 103 that connects the headrest 101 and the backrest portion 102 is suppressed. Therefore, the speaker device 1 can suppress the discomfort given to the passenger. FIG. 4 is a diagram for explaining the propagation of vibrations in the speaker device 1 according to the first embodiment.

[0026] Furthermore, the frame portion 5 of the speaker 2 is not directly held by the headrest 101, but is attached to the headrest 101 via the fixing pillars 4. Therefore, the speaker device 1 can suppress the transmission of vibration from the frame portion 5 to the headrest 101.

[0027] Second embodiment Next, a speaker device 300 according to a second embodiment will be described with reference to Fig. 5. Fig. 5 is a diagram showing the configuration of the speaker device 300 according to the second embodiment. Fig. 5 is a diagram showing the inside of a headrest 101. Here, configurations different from the speaker device 1 according to the first embodiment will be described. The same components as those in the speaker device 1 according to the first embodiment are given the same reference numerals as in the first embodiment, and detailed description will be omitted.

[0028] The speaker device 300 includes a pair of speakers 2 , a shaft 3 , a fixing post 301 , a box 302 , and a fixing member 303 .

[0029] The fixing column 301 is attached to the box 302. The lower end of the fixing column 301 is fixed to the box 302. The upper end of the fixing column 301 is fixed to the box 302. That is, the fixing column 301 is fixed to the box 302 at its upper and lower ends. Note that the fixing column 301 may have one end fixed to the box 302 and the other end not fixed to the box 302. For example, the upper end of the fixing column 301 may not be fixed to the box 302, and the lower end of the fixing column 301 may be fixed to the box 302.

[0030] The box 302 houses the pair of speakers 2, the shaft 3, and the fixing pole 301. That is, the speaker device 300 is provided on the headrest 101 with the pair of speakers 2, the shaft 3, and the fixing pole 301 housed in the box 302.

[0031] A hole 302a is formed in the box 302. The hole 302a is formed in a wall portion 302b in the left-right direction of the box 302. The hole 302a is formed at a position corresponding to the frame portion 5 of the speaker 2. Specifically, the hole 302a is formed at a position where the frame portion 5 is extended in the sound emission direction. For example, the hole 302a is larger than the outermost diameter of the frame portion 5.

[0032] It should be noted that the frame portion 5 is not held by the box 302. In other words, the speaker 2 is not directly held by the box 302, but is held by the box 302 via the shaft 3 and the fixing post 301.

[0033] The fixing member 303 holds the box 302, and is fixed to the headrest 101. The fixing member 303 is provided so as to extend in the vertical direction. An upper end of the fixing member 303 is fixed to the box 302. A lower end of the fixing member 303 is fixed to the headrest 101.

[0034] In the speaker device 300, the shaft 3 is fixed to the box 302 by a fixing support 301. In the speaker device 300, the box 302 is fixed to the headrest 101 by a fixing member 303. In the speaker device 300, the vibrations propagated from the speakers 2 to the shaft 3 cancel each other out, so that the vibrations propagated to the box 302 are suppressed. Therefore, in the speaker device 300, the propagation of the vibrations generated by the sound of the speakers 2 to the headrest 101 is suppressed. In the speaker device 300, the generation of rattles in the connecting member 103 connecting the headrest 101 and the backrest 102 is suppressed. Therefore, the speaker device 300 according to the second embodiment can suppress the discomfort given to the passenger.

[0035] Furthermore, frame portion 5 of speaker 2 is not directly held by box 302, but is held by box 302 via fixing posts 301. Box 302 is held by headrest 101 via fixing members 303. Therefore, speaker device 300 can suppress the transmission of vibration from frame portion 5 to headrest 101.

[0036] (Modification) The fixing pillar 4 may be provided so as to hold the center of the shaft 3 in the extension direction of the shaft 3 (for example, the left-right direction) as shown in Fig. 6. For example, the fixing pillar 4 is provided so as to include a midpoint P of the shaft 3 on a virtual extension in the up-down direction. Fig. 6 is a schematic diagram showing the configuration of a speaker device 1 according to a modified example. For example, the shaft 3 is fixed to a headrest 101 by one fixing pillar 4. The fixing pillar 301 according to the second embodiment may also have a similar configuration.

[0037] Since the shaft 3 is held near the center in the extension direction by the fixing pillar 4, the speaker device 1 can suppress the vibrations generated by the sound of the speaker 2 from being transmitted to the headrest 101.

[0038] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0039] 1,300 Speaker device 2 Speakers 2a back 3 Shaft 4, 301 Fixing post 5 Frame section 5a diaphragm 6 Drive unit 100 Car seats 101 Headrest Box 302 303 Fixing member

Claims

1. A speaker device provided in a headrest of a vehicle seat, A pair of speakers; a shaft that joins the rear surfaces of the pair of speakers together; Equipped with The pair of speakers are provided so that their back surfaces face each other, The shaft is held on the headrest via a fixing post.

2. The speaker includes a frame portion that contains a diaphragm, The frame portion is not held by the headrest, 2. The speaker device according to claim 1, wherein the fixing post holds the shaft and is fixed to the headrest.

3. a box that houses the pair of speakers, the shaft, and the fixing pole and to which the fixing pole is fixed; a fixing member that holds the box and is fixed to the headrest; The speaker device according to claim 1 , comprising:

4. The speaker includes a frame portion that contains a diaphragm, The speaker device according to claim 3 , wherein the frame portion is not held by the box.

5. The speaker device according to claim 1 , wherein the fixing post holds a center of the shaft in an extension direction of the shaft.

Images