JPH0127350Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on a small stereo cassette tape,
The present invention also relates to a stereo speaker that can be used by connecting to a radio or the like, and particularly to a compact speaker device that is foldable for convenient portability.

Below, the speaker device of this invention is shown in Figures 1 to 3.
This will be explained based on the diagram.

The speaker device of this invention is roughly divided into speaker casings A and B formed by an inner casing 1 supporting a speaker, and an outer casing 21 superimposed on the inner casing 1.
Figure 1 is a front view with the speaker surface open to the left and right, Figure 2 is a side view mainly showing only the right speaker housing A in section, and Figure 3 is a cross-sectional view of the speaker housing A. The back view of the figure is shown. In addition, speaker housing A,
Since B are formed almost identically, the following description will be made with respect to one.

As shown in FIG. 3, the inner casing 1 has locking pieces 2, 2... for speaker mounting, holes 3, 3... for grille mounting, and an engaging piece that engages with the outer casing 21. 4, and a pair of support shafts 7 formed with raised screw holes 5 and bosses 6 for fixing the outer casing 21, and further provided with a circular groove 8 for hanging an O-ring for hinge connection, which will be described later. are formed at the top and bottom. The outer periphery of the surface of the inner casing 1 is a tapered surface 9 as shown in FIG. be.

In addition, a display 12R that displays the left and right sides of the speaker,
12L is also provided as required.

The speaker 31, which is formed into a substantially rectangular shape, is fixed to the inner housing 1 by the locking piece 2, as shown in FIG. , is fixed by inserting the protruding piece 34 into the mounting hole 3 and then bending it. The speaker 31 is formed to be flat and small, and a dustproof net 32 is pasted on the back surface of the speaker 31 to prevent iron powder and the like from entering. Since the magnetic circuit is located slightly outward from the center, the low range is radiated from the center and the high range is radiated from the outside. 3
Since there is extra space on the inside of 1, the speaker terminal board 35 can be installed in that area.

The outer casing 21 is formed with a protruding piece 22 that abuts the engagement piece 4 of the inner casing 1, a group of small holes 23 for sound emission, and a screw that abuts the screw hole 5 of the raised floor of the inner casing 1. A through hole 24 for fastening is formed. Note that the semicircular recess 25 is a portion that comes into contact with the support shaft 7 of the inner casing 1 .

Next, the hinge portion C that connects the speaker casings A and B in an openable and closable manner will be described.

The hinge portion C is formed from an outer hinge 51 and an inner hinge 61 that overlaps with the outer hinge 51, and each hinge 51, 6
1 includes semicircular recesses 52, 52 and 62, 62 that fit into the support shaft 7 formed in the inner housing 1.
is formed. Therefore, this outer hinge 51
By fitting the support shaft 7 of the inner casing 1 into the recesses 52 and 52 of the inner hinge 61 and overlapping the recesses 62 and 62 of the inner hinge 61, the speaker casings A and B are hinged together with two axes. It means that it was done. As will be described later, a pair of O-rings 41 are hung in a figure 8 shape in a circular groove 8 provided in the support shaft 7 of the inner housing 1, so that the movements of the speaker housings A and B are related to each other. It is shown.

Note that through holes 53, 53 and screw holes 63, 63 are provided to connect the outer and inner hinges 51, 61, and the center part of the outer hinge 51 is a convex part 54 that protrudes inward, and a speaker cord is connected to this part. A square hole 55 is formed into which a bush (not shown) for pulling out the plug is inserted, and a semicircular groove 56 (see Fig. 2) into which a plug is housed from the outside is formed in the outer hinge 51, as will be described later. ing.

Next, assembly will be briefly explained.

First, the speaker 31, speaker grill 33, etc. are attached to the inner casing 1, which is integrally molded of synthetic resin or the like, and the hooks 10, 11 described above are attached to predetermined locations by ultrasonic welding or the like. Speaker terminal board 3
The cord (not shown) soldered to the outer hinge 51 is pulled out from the hole penetrating the support shaft 7 to the hinge portion C (see FIG. 9), and is further inserted into the square hole formed in the outer hinge 51. It is delivered to the outside through a bush inserted in 55.

By fitting the spindle 7 of the inner casing 1 into the semicircular recesses 52, 62 of the outer hinge 51 and the inner hinge 61, and screwing the inner and outer hinges 51, 61, the left and right speaker casings are assembled. Connect bodies A and B with a hinge. At this time, the pair of support shafts 7 of the left and right speaker casings A and B are coupled by threading an O-ring 41 into the circular groove 8 thereof.

Finally, each outer casing 21 is connected to the circular casing 1.
Stack them together and secure them with screws to complete the assembly.

The speaker device of this invention assembled as described above can exhibit the following effects.

First, when not in use, the left and right speaker housings A and B can be folded at the hinge portion C, so that they can be made into a compact shape. At this time, the outer hinge 5
The speaker 31 pulled out from the square hole 55 of 1
By folding the code W, the inner casing 1
As shown in FIG. 4, the cord W can be wound around the V-shaped groove in which the tapered surface 9 is formed.
Storage is done smoothly.

Note that the shape of the groove formed when folded is not limited to a V-shape, but may be a U-shape, a rectangular shape, or the like.

Furthermore, in the speaker device of this invention, as described above, the square hole 5 for taking out the cord of the outer hinge 51 is
5 is formed on the convex portion 54, so by forming the portion of the convex portion 54, which is concave when viewed from the outside, to have a width slightly narrower than the plug diameter of the cord, the diameter of the convex portion 54 shown in FIG. , b, the plug P can be crimped and fixed in the semicircular or U-shaped groove 56 while pushing the cord W wound around this part. Therefore, the cord W wound around the speaker casings A and B will not loosen and come off from the casings.

Note that when the speaker casings A and B are expanded, as shown in FIG.
It is also possible to set the degree of opening of the left and right speaker housings A and B to approximately 230°. However, in the embodiment described above, the semicircular groove 56 and the protrusion 57 for crimping and fixing the plug were provided on the outer hinge 51, but these may be provided on the outer casing 21, for example.

The square hole 55 for pulling out the cords pulled out from the speaker casings A and B is provided below the center of the outer hinge 51, so when the speaker casings A and B are opened and stood, the cords are pulled out from the bottom of the speaker system. Stability is good because it is pulled out from the Moreover,
Since the square hole 55 is provided in the center of the outer hinge 51, when the speaker housings A and B are folded and the cord is wound and stored as described above, the cord is wound smoothly.

As mentioned above, the hinge part C of this invention has an O-ring 4 inserted into the circular groove 8 provided in the support shaft 7 of the left and right inner casings 1.
1 is crossed as shown in FIG. 7, and several knurled surfaces 8a are formed in the circular groove 8 to prevent the O-ring 41 from slipping. The opening and closing of the speaker can be related.

In FIG. 7, when one speaker housing A is operated in the direction of opening, the support shaft 7 rotates in the direction of arrow A. Therefore, since the O-ring 41 is pulled in the direction of arrow A', the other support shaft 7' rotates in the direction of arrow B, and the other speaker housing B is also driven in the opening direction.

Also, when the other speaker housing B is operated in the direction of opening, the support shaft 7' rotates as shown by the arrow B, so that the O
The ring 41 is pulled in the direction of arrow B', and one of the support shafts 7 is rotated in the direction of arrow A, and the speaker housing A
drive in the direction of opening.

Therefore, the hinge mechanism of this invention prevents the O-ring 41 from slipping, so that the speaker housing A,
Since B is controlled so that it always has the same motion,
The speaker device can be opened and closed smoothly.

The material of O-ring 41 is NBR (nitrile butadiene rubber), SBR (styrene butadiene rubber).
rubber), urethane, etc., but O-ring 4
At the intersection of 1, silicone oil,
Applying mineral oil, molybdenum, grease, etc. will make opening and closing operations smoother.

Note that an endless string can be used in place of the O-ring 41, but it is also possible to lock the ends of the spring 42 to the support shafts 7 of the left and right inner casings 1, as shown in FIG. good.

As shown in FIG. 9, the boss 6 provided on the inner housing 1 is set at a position where the cord soldered to the speaker terminal plate 35 is held between the screw hole 5 in the raised floor.

Therefore, as shown in FIG.
The cord soldered to the terminal plate 35 passes through the through hole of the support shaft 7 and selects four routes a, b, c, and d as routes to the square hole 55 for pulling out the cord. Therefore, the cord length can be adjusted within the inner casing 1, and therefore the cord length outside the casing can be adjusted to a predetermined length.

The two hooks 10 and 11 that engage when the speaker casings A and B are folded are individually molded from colored polyacetate, ABS resin, polyethylene, vinyl chloride, etc., and are attached to the inner casing 1. Since it is welded to a predetermined location by ultrasonic welding or the like, it can be installed regardless of whether the inner casing 1 is painted or not. Therefore, there is no peeling of the paint due to long-term use, which tends to occur with hooks that are molded and painted integrally with the inner housing 1.
It looks good, and since it is joined by welding, it does not get dirty when using adhesive.

Instead of the hook structure, a suction cup may be provided on one of the inner casings 1, and the contact surface of the other inner casing 1 may be mirror-finished so that the speaker casings A and B are locked when closed. good.

As detailed above, the speaker device of this invention has two speaker casings that can be folded together by a hinge connection. By aligning them together, there is less risk of external dirt and dust adhering to the speakers from the sound emission holes of the grill. (Please note that even if dirt or dust gets in through the back of the speaker housing, i.e. the sound emitting hole in the outer housing, a dustproof net is attached to the back of the speaker, which prevents dirt or dust from directly adhering to the speaker. ) Even so, dirt and dust may enter from the gap between the mating surfaces of the two casings, that is, from the peripheral side of the speaker device, pass through the sound emission hole of the grille, and adhere to the speaker's diaphragm, etc., resulting in poor sound quality. In the present invention, since the cord can be wound around the circumferential side of the speaker device, the gap in the circumferential side of the speaker device is closed by the cord, and dirt and dust can be prevented from entering from the circumferential side. Furthermore, the cord can be folded to make it more compact, and by winding the cord, the cord will not get in the way or get tangled, making it easier to handle.

[Brief explanation of the drawing]

Figures 1 to 3 show the speaker device of this invention, with Figure 1 being a front view, Figure 2 being a partially sectional side view, Figure 3 being a back view, and Figure 4 being a back view. An explanatory diagram for winding the cord, Figures 5a and b are explanatory diagrams for fixing the plug, Figure 6 is an enlarged view of the speaker housing, and Figure 7 is an explanatory diagram for fixing the plug.
The figure is an explanatory diagram of the operation of the hinge part, FIG. 8 is a diagram showing another embodiment of the hinge part, and FIG. 9 is a diagram showing the arrangement of speaker cords. In the figure, A and B are the left and right speaker housings, C is the hinge part, 1 is the inner housing, 7 is the support shaft, 9 is the tapered surface, 1
0 and 11 are hooks, 21 is an outer casing, 31 is a speaker, 41 is an O-ring, 51 is an outer hinge, and 61 is an inner hinge.

Claims (1)

[Scope of utility model registration request] two speaker casings each having a front surface in which the sound emission hole of the speaker is formed, and a rear surface having approximately the same shape as the front surface and having a larger area; A speaker device is constituted by a hinge portion that can be folded so that the front surfaces of the speaker casings face each other, and a cord pulled out from the speaker device is attached to an outer periphery formed when the two speaker casings are folded. A speaker device characterized by being able to be wound around a groove on a side surface.