JPS6141350Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an on-vehicle speaker unit, and more specifically, to a composite type on-vehicle speaker unit.

In-vehicle speaker units have been improved so that you can enjoy reproduced sound that is faithful to the original sound even in the car, and coaxial composite speaker units have come to be used like home-type speakers. Although the composite type speaker has excellent characteristics, when it is used as a vehicle-mounted speaker, satisfactory characteristics cannot necessarily be obtained due to its mounting position.

In other words, in the case of in-vehicle audio equipment, the speaker unit is installed in the rear parcel tray of most cars, and this rear parcel tray is usually gently sloped.
Since it is in an almost horizontal position, if you install an in-vehicle speaker unit on this rear parcel tray,
Its central axis does not point toward the interior, but rather intersects with the rear window glass. In that case, the sound waves in the low frequency range have poor directionality, so there is no problem for the passenger to hear the sound waves in the low frequency range, but the sound waves in the middle and high frequency range are highly directional, so the passenger should listen to the sound waves in the rear range. The user must listen to attenuated waves reflected from the window glass and the ceiling, making the direction of the sound source unclear, and in the case of stereo playback, the sense of separation between left and right sounds is significantly impaired.

However, installing a speaker unit on the rear parcel tray allows you to use the large space in the trunk as a speaker box, and is effective in bringing out deep bass. It was the current situation.

Therefore, as an improvement on the above-mentioned point, the present applicant has previously proposed that the bass speaker A be installed so that its central axis is perpendicular to the surface of the rear parcel tray T, as in the past, as shown in FIG. At the same time, attach a holder C' to the frame of the bass speaker A', and use the holder C' to hold the mid-range and high-range speaker B', whose center axis is the bass speaker A'.
We proposed a composite vehicle-mounted speaker installed in a configuration that intersects the central axis of A' at an angle of about 30 degrees. According to this car speaker, the second
As is clear from the sound pressure distribution shown in the figure, the treble range now exists in the center of the spread of the bass range, making it possible to realize reproduction with a fixed sound image.

However, even with the above-mentioned coaxial composite speakers or composite speakers whose center axes intersect, the input to the treble speaker is a cord branched from the tinsel wire to the bass speaker, or directly branched from the input terminal of the speaker frame. However, the assembly and wiring of the composite speaker itself were very complicated.

Therefore, we fixed the treble speaker on a grill that removably fits into the frame of the bass speaker.
A composite speaker has been proposed in which an external input line is led to the frame, and a jack provided on the frame and a plug provided on the grill connect the treble speaker and input line when the grill is attached or removed. Attaching the grille to the frame from directly above is a cumbersome task as it is done on the car's rear tray, and the plugs and
There was a risk that the jack contact would become unstable.

The present invention was developed in view of these points, and its purpose is to provide a composite in-vehicle speaker unit that is easy to assemble and has a stable connection even when the vehicle vibrates. .

Hereinafter, the present invention will be explained in detail with reference to examples.

FIGS. 3 and 4 show one embodiment of the invention, in which the in-vehicle speaker unit includes a bass speaker A whose central axis is orthogonal to the surface of the rear parcel tray T; , and a high-pitched speaker C whose central axis is parallel to the central axis of the mid-range speaker B.

The bass speaker A includes an external magnetic type drive unit 5 composed of a bottom plate 1, a ring-shaped magnet 2, a top plate 3, and a center pole 4. At the center of the pole 4, communicating through holes 1a and 4a are formed. 6
is a terminal holder, which is formed of an insulating and non-magnetic material with a large diameter hole 6a and a small diameter hole 6b communicating with each other in the axial direction, and the large diameter hole 6a has a side hole 6c penetrating through the side surface. It is formed. The stepped portion 6d formed at the lower end is fitted and fixed to the top of the center pole 4, whereby the large diameter hole 6a, the small diameter hole 6b, and the through holes 1a and 4a are in a coaxial state. It communicates with A frame 7 is fixed to the top plate 3 of the drive unit 5, and an edge 9a of a cone-shaped diaphragm 9 is fixed to the outer periphery of the frame 7 on the opening side by a gasket 8. A bobbin 11 on which a voice coil 10 is wound is fixed to the inner circumference of the diaphragm 9, and the position of the voice coil 10 relative to the magnetic gap g is regulated by the terminal holder 6.
This is achieved by a damper bonded to a step portion 6e formed at the top of the diaphragm 9 and a diaphragm 9. 13 is a jack as a terminal fitting provided above the small diameter hole 6b of the terminal holder 6;
It has a terminal 13a to which one of the tinsel wires 14 connected to the lead wire of the voice coil 10 is connected, a terminal 13b to which the other tinsel wire 14' is connected, and a terminal (not shown) at the lower end. Large diameter hole 6 above
a, and a two-core input line 15 drawn out to the outside through the through holes 1a and 4a.

Bass speaker A configured as above
A grill frame 16 made of a resin material is removably fitted to the opening side of the frame 7, and a mid-range speaker B and a treble speaker C are fixed to the rising opening 16a of the grill frame 16.
Reference numeral 17 denotes a protective net that covers a flat portion of the grille frame 16 including the grille 16b, and 18 denotes a protective net that covers the front surface of the grille 19 on the front side of the midrange speaker B.

In the central portion 16c of the grill frame 16,
A terminal cover 20 is fitted and fixed at a position coaxial with the center axis of the bass speaker A. The terminal cover 20 has a portion at its upper end that fits into the center portion 16c of the grill frame 16, and a through hole 20 at its lower surface.
a is formed. Reference numeral 21 designates a plug as a terminal, which is molded with a soft material 22 such as rubber and positioned within the terminal cover 20, so that its tip protrudes downward from the through hole 20a, and the connecting portion 21a is It protrudes laterally from the notch 20b. A lead wire 23 that is connected to the voice coil of the midrange speaker B and the voice coil of the treble speaker is connected to this connecting portion 21a.

In the above, frame 7 of bass speaker A
If the grill frame 16 is separated from the grill frame 16, the bass speaker A, the mid-range speaker B, and the treble speaker C will be separated electrically and mechanically. The separated bass speaker A is attached to the rear parcel tray T at the frame 7.

Next, the grill frame 16 is connected to the frame 7.
When fitting and fixing the plug 21 to the jack 1,
In this case, plug 2 is connected to plug 2.
1 can be displaced within the soft material 22, so
Even if the axes of the plug 21 and the jack 16 are slightly shifted from each other, extremely smooth fitting can be achieved.

When assembled as described above and actually operated, the diaphragm 9 in the bass speaker A causes a piston movement with a particularly large amplitude, and at this time the damper 1
Although the volume of the space inside 2 changes significantly, the space is connected to the outside air through the side hole 6c, the large diameter hole 6a, and the through holes 1a and 4a, so air can enter and exit. There is no way that normal vibration of the diaphragm 9 can be prevented.

From the above, according to the in-vehicle speaker unit according to the present invention, when the grille frame is attached to the opening of the bass speaker, the input line of the treble speaker is automatically connected using the plug and jack. The type speaker is easy to assemble, and the plug is partially embedded in a soft material, so even if the axis is slightly misaligned or the plug is inserted into the jack from an angle, the installation and removal work is smooth. Furthermore, since the soft member absorbs the vibration of the plug even if there is vibration from the running car, the contact between the plug and the jack can always be stable.

Furthermore, when the plug jack is located at the center of the bass speaker as in this embodiment, the relative positions of the bass speaker frame and the grill frame are free in the circumferential direction with this as the center. , the degree of freedom in designing the shape of the peripheral portion and other aspects increases.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the installation of an in-vehicle speaker unit, Fig. 2 is a sound pressure distribution diagram when the in-vehicle speaker unit is installed as shown in Fig. 1, and Fig. 3 is a perspective view of an in-vehicle speaker unit according to an embodiment of the present invention. , FIG. 4 is a sectional view of the speaker unit, and FIG. 5 is a plan view of the top of the terminal holder in FIG. 4. A...Bass speaker, B...Medium speaker, C...Treble speaker, 1...Bottom plate, 2...Magnet, 3...Top plate,
4... Center pole, 5... Drive unit, 6... Terminal holder, 7... Frame, 8...
Gasket, 9...Diaphragm, 10...Voice coil, 11...Bobbin, 12...Damper, 13...
Jack, 14... Tinsel wire, 15... Input line, 1
6...Grill frame, 17...Protective net, 1
8...Protective net, 19...Grill, 20...Terminal cover, 21...Plug, 22...Soft material, 2
3... Lead wire.

Claims (1)

[Scope of utility model registration request] A mid-high frequency speaker is attached to the opening of the bass speaker by a grill frame, and a plug is attached to one of the bass speaker side and the grill frame side, and a jack is attached to the other side, and the plug and the jack are attached to each other. An in-vehicle speaker unit configured such that an input signal is transmitted to the mid-to-high frequency speaker by coupling, characterized in that a portion of the plug is buried in a soft member, and the shaft center is movable. An in-vehicle speaker unit.