JPH04103095U - speaker - Google Patents

Abstract

(57) [Summary] [Purpose] One magnetic circuit drives two types of voice coils, and one of the woofer voice coils is placed in a narrow area within the gap, thereby sacrificing the sensitivity in the bass range. To reduce the cost of a 2-way speaker without any hassle. [Configuration] In gap 4 of the magnetic circuit, there is a first
In a speaker in which a voice coil 6 and a second voice coil 5 for a tweeter or a squawker are arranged, a stepped portion 2a extending in the circumferential direction is provided on the outer periphery of the tip of the center pole 2 to form the gap 4. It is partially widened, and the second voice coil 5 is arranged around this stepped portion 2a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a two-way system that can reproduce bass signals and signals in other ranges separately. Regarding peakers.

0002

[Conventional technology]

Conventionally, this type of speaker has two concentric gaps formed in the magnetic circuit. Then, place the tweeter or squawker voice coil in the inner gap. , and a coaxial speaker with a woofer voice coil located in the outer gear. is widely known. However, this one shares part of the yoke However, since it requires two magnetic circuits, it has a large number of parts and is complicated to assemble. However, this resulted in an expensive speaker.

0003 On the other hand, the speaker disclosed in Utility Model Application Publication No. 62-27000 is As shown in 3, there is only one magnetic circuit, and the center port installed vertically on the lower plate 1. Two types of voice coils 5 and 6 are arranged in the gap 4 between the coil 2 and the upper plate 3. Therefore, the inner voice coil 5 is used for tweeter or squawker. If the outer voice coil 6 is used for the woofer, the bass and other sound ranges will be It becomes possible to manufacture a speaker that can reproduce individual numbers at a low cost. In addition, Reference numeral 7 in the figure indicates a ring interposed between the lower plate 1 and the upper plate 3. This shows a shaped magnet.

0004

[Problem that the idea aims to solve]

However, voice coils for woofers that require large driving force have high magnetic flux density. Since the voice must be placed within the gap, the structure shown in Figure 3 was adopted to If coil 6 is used for the woofer, gap 4 will become too wide and the magnetic flux density will be insufficient. Therefore, there was an inconvenience that the sensitivity in the bass range deteriorated.

[0005] This invention was devised in view of these circumstances, and its purpose is to improve the sensitivity of the bass range. The object of the present invention is to provide a two-way speaker with good performance at low cost.

[0006]

[Means to solve the problem]

The purpose of the present invention described above is to Inside the gap, there is a first voice coil for the woofer and a tweeter or squawker. In a speaker in which a second voice coil is arranged, the center pole The gap is partially widened by providing a step extending along the circumferential direction on the outer periphery of the tip. However, this is achieved by arranging the second voice coil around this step. It will be done.

[0007]

[Effect]

According to the above means, the second voice coil, which does not require particularly high magnetic flux density, is By placing the first voice coil for the woofer in a relatively wide area within the can be placed in a narrow area within the gap and driven under high magnetic flux density.

[0008]

【Example】

Hereinafter, one embodiment of the present invention will be explained with reference to the sectional view of FIG. 1 and the enlarged view of the main parts of FIG. I will explain.

[0009] In these figures, reference numeral 1 indicates a lower plate on which a center pole 2 is erected; is the upper plate, 4 is the gap formed around the center pole 2, and 5 is the gap formed around the center pole 2. Voice coil for tweeter, 6 is voice coil for woofer, 7 is lower and upper plate. A ring-shaped magnet is interposed between ports 1 and 3, 8 is a woofer damper, and 9 is a woofer damper. is a frame, 10 is a tweeter cone excited by the tweeter voice coil 5, 1 Reference numeral 1 indicates a woofer cone that is vibrated by a woofer voice coil 6, respectively. As is clear from Fig. 2, the outer periphery of the tip of the center pole 2 is provided along the circumferential direction. A stepped portion 2a is formed, and a layer of silicone rubber or the like is formed around this stepped portion 2a. The tweeter voice coil 5 is arranged via the tweeter damper 12. It is shown.

0010 In other words, this speaker has a tweeter voice in gap 4 of one magnetic circuit. By arranging the coil 5 and the woofer voice coil 6, high-frequency signals and low-frequency signals can be generated. The gears are regenerated individually around the stepped portion 2a of the center pole 2. For tweeters where knob 4 is partially widened and does not require particularly high magnetic flux density. Because the voice coil 5 is placed there, it can be used for woofers that require large driving force. Regarding the voice coil 6, the gap 4 is placed in a narrow area with little leakage of magnetic flux. It is now possible to do so.

[0011] In this way, although the above embodiment is a two-way speaker, the magnetic circuit is only one. This reduces the number of parts and assembly man-hours, resulting in significant cost reductions. It is being expressed. Moreover, the step part 2a of the center pole 2 is used to create a tweeter voice. Space is secured for the placement of the coil 5, so the voice coil 6 for the woofer is connected to the gear. The woofer voice coil 6 is placed in a narrow area within the knob 4, so the woofer voice coil 6 has a high magnetic field. Can be driven under flux density and can reproduce bass signals with good sensitivity It is becoming.

0012 In the above embodiment, the voice coil 5 placed inside the gap 4 has a tweeter. The explanation is for the case where the voice coil 5 is for a squawker. Also good.

[0013]

[Effect of the idea]

As explained above, the present invention partially widens the gap in the magnetic circuit and By arranging a tweeter or squawker voice coil, the woofer The voice coil for the Since the power is obtained, it is a 2-way speaker with good sensitivity in the bass range. can be provided at low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the overall structure of a speaker according to an embodiment of the present invention.

FIG. 2 is an enlarged view of main parts of the speaker shown in FIG. 1;

FIG. 3 is a cross-sectional view showing a magnetic circuit of a conventional speaker.

[Explanation of symbols]

1 Lower plate 2 Center pole 2a Stepped section 3 Upper plate 4 Gap 5 Voice coil for tweeter 6 Voice coil for woofer 7 Magnet

Claims (1)

[Scope of utility model registration request] 1. A speaker in which a first voice coil for a woofer and a second voice coil for a tweeter or squawker are arranged in a gap formed around a center pole of a magnetic circuit, A speaker characterized in that a stepped portion extending along the circumferential direction is provided on the outer periphery of the tip of the center pole to partially widen the gap, and the second voice coil is disposed around the stepped portion. .