CZ373896A3 - Loudspeaker and process for producing the loudspeaker ring - Google Patents

Abstract

This invention concerns a method for the production and application of annular suspension edges of loud speaker diaphragms according to which said annular edge is moulded directly on the edge of the diaphragm, which is pre-loaded in the edge mould. <IMAGE>

Description

(57)

The peripheral ring (1) is placed directly on the outer edge (2a) of the diaphragm (2), which is biased on the peripheral ring (1), so that the outer edge (2a) of the diaphragm (2) is connected to it and automatically adheres to the inner indentation. (1b) a peripheral ring (1).

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Technical field

The invention relates to a method of manufacturing a loudspeaker ring and a loudspeaker itself manufactured according to the method.

BACKGROUND OF THE INVENTION

In conventional loudspeakers, the membranes are formed as a funnel cone with a circular or elliptical horizontal cross section. In the center of the membrane, it is anchored to a movable spiral which is supported by a flexible disk called a centering element in a likewise conical carrier which holds the membrane and to which the magnetic circuit is externally connected.

The diaphragm is provided on its larger periphery with a flexible expansion peripheral ring and is fixed thereto in the same manner as it is mounted on the flange of the carrier to which it is glued by its peripheral flap.

These dilatation peripheral rings are made by punching or cutting from a flexible blank either in the form of a circle or an ellipse, usually of polyurethane resin, and are characterized by a semicircular indentation on the outer periphery.

Obviously, the purpose of the circumferential ring is to compensate for the elastic shocks while at the same time anchoring the membrane in the carrier, while avoiding the possibility of picking up the movable spiral to which the membrane is anchored again on the other side. The anchoring of the diaphragm to the upper periphery of the carrier on the carrier is ensured through an inner indentation of the peripheral ring to which the outer periphery of the membrane adheres.

In conventional loudspeakers, the peripheral ring is first adhered to the outer periphery of the diaphragm, and then the peripheral ring of the peripheral ring is adhered to the carrier flange. This is associated with many technological problems. Firstly, during production, a plurality of annuluses that are larger than they are to be cut are cut out of the cut-out, resulting in high waste and costly production. Furthermore, the present manufacturing process is very laborious and requires a greater number of fitters to apply the adhesive to the surfaces provided because the gluing is very difficult to automate due to the complexity of the simultaneous two-part operation and the fineness of the material being processed.

It is an object of the present invention to provide a method to overcome the aforementioned problems in the manufacture of loudspeakers.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks overcome the manufacturing process of the loudspeaker ring according to the invention, which consists in that the peripheral ring is placed directly on the outer edge of the diaphragm, which is biased on the peripheral ring, so that the outer edge of the diaphragm connects thereto and automatically adheres to peripheral ring. Obviously, this method on the one hand removes scrap and also eliminates the need for manual work to connect the peripheral ring to the membrane when gluing.

According to a preferred embodiment, during the same shaping operation and from the same material as the peripheral ring, a seal is formed against the conical loudspeaker support, which consists of a suitably shaped circular rib on the peripheral flap of the peripheral ring.

In another preferred embodiment, during the same shaping phase and from the same material as the peripheral ring, a layer of resilient material is formed which extends from the peripheral ring to the center of the membrane, covering the entire surface of the membrane on one or both sides.

As a result of the above process, a loudspeaker is provided in which the peripheral ring is placed directly on the outer edge of the diaphragm, which is biased on the peripheral ring, so that the outer edge of the diaphragm is connected thereto and automatically adhered to the inner indentation of the peripheral ring.

In a preferred embodiment, the peripheral ring consists of a seal against the conical loudspeaker support which is formed by a suitably shaped circular rib on the peripheral flap of the peripheral ring.

In a further preferred embodiment, the peripheral ring is comprised of a layer of resilient material that extends from the peripheral ring to the center of the membrane, the entire surface of the membrane being coated on one or both sides.

Overview of the drawings

The invention will now be described by way of illustration, in which Fig. 1 is a vertical section through a loudspeaker with a perimeter ring and a diaphragm connected by the method of the invention; and Fig. 2 shows a section through another embodiment with a membrane provided with a waterproof layer.

An example of an embodiment of the invention

In Fig. 1 we see a circular dilatation peripheral ring 1, which is provided on the edge of the diaphragm 2, which is biased on the peripheral ring i. This means that already during the shaping of the ring 1 this ring is automatically glued to the periphery of the membrane 2. The invention has the additional advantage of eliminating the cost of manufacturing and assembling seals that are otherwise applied to the cone flange. As is apparent from FIG. 1, if necessary, the seal 2 may be formed during the shaping of the peripheral ring 1. After the membrane 2 has been deposited on the conical support 4, the seal 2 is mounted directly on the flange 4a of the conical support 4. The method according to the invention thus makes it possible to form the seal 3 during the shaping of the peripheral ring 1 with the same material as the ring 1, the seal 3 consisting of a suitably shaped circular rib on the peripheral flap 1a of the ring 1.

As mentioned earlier, the diaphragm 2 is biased towards the ring 1, the outer edge 2a of the diaphragm 2 being automatically connected to the inner indentation 1b of the peripheral ring 1. As a result, during the forming of the ring 1, which extends from the ring 1 towards the center of the diaphragm 2 and covers the entire surface thereof either on one side only or on both sides as required. This layer 5 of elastic waterproof material, which is formed in the same molding phase and of the same material as the peripheral ring, has two functions. On the one hand, it ensures the impermeability of the diaphragm 2 and also dampens vibrations, thereby allowing tone modulation of the diaphragm 2.

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Claims (6)

PATENTOVÉ I.E O> 2 o o o c ca. σ o czx OKY oc in A method of manufacturing a loudspeaker ring, characterized in that the peripheral ring is placed directly on the outer edge of the diaphragm, which is biased on the peripheral ring, so that the outer edge of the diaphragm is bonded thereto and automatically adheres to the inner recess of the peripheral ring. Method according to claim 1, characterized in that during the same shaping operation, and from the same material as the peripheral ring, a seal against the conical loudspeaker carrier is formed, which consists of a suitably shaped circular rib on the peripheral flap of the peripheral ring. Method according to claims 1 and 2, characterized in that during the same shaping phase, and from the same material as the peripheral ring, a layer of elastic material is formed which extends from the peripheral ring to the center of the membrane, covering the entire surface membrane on one or both sides. A loudspeaker consisting of a diaphragm mounted on a peripheral ring, characterized in that the peripheral ring (1) is placed directly on the outer edge (2a) of the diaphragm (2), which is biased on the peripheral ring 1 so that the outer edge (2a) 1) of the diaphragm (2) is connected thereto and automatically glued to the inner indentation (1b) of the peripheral ring (1). Loudspeaker according to claim 4, characterized in that the peripheral ring (1) consists of a seal (3) relative to the conical loudspeaker support (4), which is formed by a suitably shaped circular rib on the peripheral flap (1a) of the peripheral ring (1). Loudspeaker according to claim 4, characterized in that the peripheral ring (1) consists of a layer (5) of resilient material which extends from the peripheral ring (1) to the center of the membrane (2) and is covered by the layer (5). the entire surface of the membrane (2) on one or both sides.