JPS6057798B2 - speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker comprising a diaphragm having a laminated structure in which skin layers are provided on both sides of a core, and a voice coil bobbin connected to the skin layer of the diaphragm.

First, FIGS. 1A and 2A show a connection structure of a voice coil bobbin in a conventional flat-plate speaker using a honeycomb-structured diaphragm.

By the way, the honeycomb structure diaphragm 1 has a pair of skin layers 3 and 4 on both front and rear surfaces of the core 2 and adhesive layers 5 and 6, and in the example shown in FIG. 1A, the tip of the voice coil bobbin 7 is attached to the rear skin layer 4 with adhesive. In the example shown in FIG. 2A, a voice coil bobbin 7 with a bobbin cap 9 attached to the tip is bonded to the rear skin layer 4 with an adhesive 8. Note that 10 in the figure is a voice coil. However, with such a conventional structure, there have been many accidents in which the rear skin layer 4 is torn off into a circular shape at the connection point of the voice coil bobbin 7 during driving, as shown in FIGS. 1B and 2B.

This is because the driving force of the voice coil 10 is transmitted to the rear skin layer 4 of the diaphragm 1 via the voice coil bobbin 7, and the rear skin layer 4 is locally and repeatedly bent strongly, causing bending fatigue. This is because it peels off from the adhesive layer 6 and is torn off. In addition, in order to reduce disturbances in frequency characteristics in high frequencies, some adhesive layers 5 and 6 are made softer to increase the damping effect of the diaphragm 1, but the softer the adhesive layer 6 is, the more accidents are likely to occur. The present invention was invented in view of the above-mentioned circumstances, and it effectively reinforces the skin layer of the diaphragm to which the voice coil bobbin is connected without increasing the volume or weight of the entire diaphragm. The object is to provide a device that stabilizes the connection between the diaphragm and the voice coil bobbin.

Embodiments of the present invention will be described below based on the drawings.

Note that the same reference numerals are given to the same structural parts as in the conventional example described above, and the explanation thereof will be omitted. First, FIGS. 3 and 4 show the voice coil bobbin connection location of the rear skin layer 4 in a speaker having a structure in which the voice coil bobbin 7 is connected to the rear skin layer 4 of the diaphragm 1 directly or via the bobbin cap 9. is constructed so as to be reinforced from the inside of the rear skin layer 4.

That is, a reinforcing layer 12 having, for example, a disk shape or an annular shape (doughnut plate shape) larger than the diameter of the voice coil bobbin 7 is used, and this reinforcing layer 12 is attached to the adhesive layer 6 or the like between the rear skin layer 4 and the core 2. The rear skin layer 4 is partially reinforced by the reinforcing layer 12 to form two layers. In this case, the reinforcing layer 12 and the rear skin layer 4 may be joined by the adhesive layer 6, or by welding or the like. Further, the reinforcing layer 12 may be made of the same material as the skin layers 3 and 4, such as a sheet material such as aluminum or carbon, but it does not necessarily have to be made of the same material, and may be made of any material such as metal, reinforced plastic, carbon fiber layer, etc. You can choose. Next, FIGS. 5 and 6 show a speaker having a structure in which the voice coil bobbin 7 is passed through the core 2 and connected to the front skin layer 3 of the diaphragm 1 directly or via the bobbin cap 9, The voice coil bobbin connecting portion of the front skin layer 3 is reinforced by the reinforcing layer 12 from the inside of the front skin layer 3 in the same manner as described above.

However, in this case, the voice coil bobbin 7 is connected to the front skin layer 3 via the reinforcing layer 12. In the embodiments described above, the reinforcing layer 12 can also be a complement layer.

The present invention provides a speaker comprising a diaphragm with a laminated structure in which skin layers are provided on both sides of a core, and a voice coil bobbin connected to the skin layer of the diaphragm, in which the skin layer to which the voice coil bobbin is connected and the core A reinforcing layer larger than the diameter of the voice coil bobbin is interposed between the voice coil bobbin and the skin layer, and the connection portion between the voice coil bobbin and the skin layer is reinforced from the inside on the skin side.

Therefore, according to the present invention, the area where the skin layer receives the force of the voice coil bobbin during driving or the area where the force applied from the voice coil bobbin to the skin layer is transmitted increases, and the force is dispersed and weakened. Therefore, it is possible to prevent the skin layer from being locally and strongly repeatedly bent, peeled off, and torn off. This stabilizes the connection between the diaphragm and the voice coil bobbin and significantly improves reliability. Moreover, according to the present invention, the reinforcing layer is embedded in the adhesive layer provided between the skin layer and the core, which increases the volume and weight of the entire diaphragm. Never. For example, if a reinforcing layer is bonded to the outside of the skin layer via an adhesive layer, the volume and weight of the reinforcing layer and adhesive layer will directly increase the volume and weight of the diaphragm as a whole, and will affect the appearance. It also makes you look bad. However, when embedding the reinforcing layer in the adhesive layer between the skin layer and the core as in the present invention, it is natural that the adhesive layer with a volume corresponding to the volume of the reinforcing layer is removed and buried. Therefore, the volume and weight of the entire diaphragm do not increase. And according to the present invention,
Since the volume and weight of the entire diaphragm does not increase, the sensitivity of the speaker does not decrease. Furthermore, since the reinforcing layer is embedded in the adhesive layer, etc., the appearance of the diaphragm is also very good.

[Brief explanation of drawings]

Figures 1A and 1B are cross-sectional views showing conventional examples;
2B and 2B are cross-sectional views showing how the skin layer is torn in the conventional example. 3 to 6 are sectional views showing embodiments of the present invention, respectively. Also, in the symbols used in the drawings, 1...
...Diaphragm, 3...Front skin layer, 4...
. . . Rear skin layer, 7 . . . Voice coil bobbin, 12 . . . Reinforcement layer.

Claims (1)

[Scope of Claims] 1. In a speaker comprising a diaphragm with a laminated structure in which skin layers are provided on both sides of a core, and a voice coil bobbin connected to the skin layer of the diaphragm, the skin layer to which the voice coil bobbin is connected. A reinforcing layer larger than the diameter of the voice coil bobbin is placed in an intermediate layer such as an adhesive between the core and the voice coil bobbin, and this reinforcing layer connects the voice coil bobbin and the skin layer to the inside of the skin layer. A speaker characterized by reinforcement. 2. The speaker according to claim 1, wherein the reinforcing layer is formed into a plate shape. 3. The speaker according to claim 1, wherein the reinforcing layer is formed in an annular shape.