JPS6316236Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a horn speaker, and particularly to its assembly structure.

In a conventional horn speaker, as shown in FIG. The inner cylinder 3 is fitted to the inner cylinder 3, the inner cylinder 2 is connected to the peripheral edge of the throat tool with screws 7a, the diaphragm of the driver unit is sandwiched between the magnetic circuit in the driver unit 5 and the throat tool 4, and the diaphragm of the driver unit is inserted between the magnetic circuit in the driver unit 5 and the throat tool 4, and There is one in which the unit cover 6, driver unit 5, and throat tool 4 are connected with screws 7c. In this horn speaker, each component is constructed separately, so a large number of screws are required for assembly, and therefore workability is low. Especially when connecting with screw 7b, horn outer cylinder 1 The horn outer cylinder 1 must be placed on the workbench with the opening facing upwards, whereas when connecting with the screw 7c, the horn outer cylinder 1 must be placed on the workbench with the opening facing downwards. It was also unsuitable for automatic assembly using automatic equipment.

This invention was made to solve the above problem, and therefore the horn outer cylinder, throat tool,
The peripheral wall portion of the unit cover is integrally formed, the diaphragm structure and the magnetic circuit are fitted in order into the peripheral wall portion, and these are fixed by connecting the lid member of the unit cover to the peripheral wall portion with screws. It is something.

This invention will be explained in detail below based on one embodiment shown in FIGS. 2 and 3. The horn speaker of this embodiment has a horn outer cylinder 10 as shown in FIG. 3, and a throat tool 12 is integrally formed on the rear inner surface of the horn outer cylinder 10. Furthermore, a unit accommodating portion 14 is formed extending to the rear side.

A base end portion of an inner cylinder 16 formed integrally with the middle cylinder 15 is fitted into the center of the throat tool 12.
The middle cylinder 15 is screwed to a protrusion 18 that projects from the periphery of the throat tool 12.

A diaphragm structure 2 is disposed inside the unit accommodating portion 14.
0 is stored. The diaphragm structure 20 is
A bobbin 24 around which a voice coil 22 is wound is connected to an annular member 28 via a diaphragm 26.
It is combined with . The annular member 28 has a flange portion 30 extending rearward on its outer peripheral edge,
The outer peripheral edge thereof is formed in a shape that matches the inner peripheral edge of the unit accommodating portion 14. In addition, 31 is
It is a buffer for the diaphragm structure 20, and is provided at the rear peripheral edge of the throat tool 12.

A magnetic circuit 32 is disposed above the diaphragm structure 20 within the unit accommodating portion 14 . The magnetic circuit 32 includes plates 36 and 38 provided on both upper and lower sides of an annular permanent magnet 34, the plate 36 having a center pole 40 extending into the opening of the permanent magnet 34, and the plate 38 having a center pole 40 extending into the opening of the permanent magnet 34. An opening is formed so as to form a gap 42 between the center pole 40 and the center pole 40 . The outer diameter of the center pole 40 and the diameter of the opening of the plate 38 are selected so that the voice coil 22 is located within this gap 42. Further, the outer peripheral edge of the plate plate 38 is formed to match the inner peripheral edge of the flange portion 30.

The combination of the diaphragm structure 20 and the magnetic circuit 32 constitutes a drive unit, the height of which is approximately equal to the height of the unit accommodating part 14. The lid member 44 is housed inside the lid member 44.
is connected to the unit accommodating portion 14 with the screw 46,
The diaphragm structure 20 and the magnetic circuit 32 are pressed and fixed. Note that 48 is a screw insertion hole drilled in the lid member 44, 50 is a screw hole cut in the unit accommodating portion 14, and 52 is a lead wire connected to the voice coil 22.

The horn speaker constructed as described above is manufactured as follows. First, the middle cylinder 15 and the inner cylinder 16 are attached to the throat tool 12. Next, as shown in FIG. 3, the outer cylinder 10 is placed on the workbench 54 with its sound emitting opening facing downward. Then, the diaphragm structure 20 and the magnetic circuit 32 are housed in the unit housing part 14 in this order, and the lid member 44 is coupled to the unit housing part 14 with screws 46. This completes the assembly.

In the horn speaker according to this invention, the outer cylinder 10, the throat tool, and the unit accommodating part 14 are integrally formed, so the number of parts is small, and the labor of assembling these parts is saved, and the middle cylinder 15 and the inner cylinder 16, all remaining assembly work can be performed with the outer cylinder 10 placed on the workbench 54 with its sound emitting opening facing downward. moreover,
Since the height of the diaphragm structure 20 and the magnetic circuit 32 in the assembled state, that is, the height of the drive unit, is selected to be approximately equal to the height of the unit accommodating portion 14, the lid member 44 can be easily accommodated in the unit. The diaphragm structure 20 and the magnetic circuit 32 can be attached to the diaphragm structure 20 and the magnetic circuit 32 by a simple operation of screwing the parts 14.
can be fixed by pressing. In this way, the horn speaker can be assembled while keeping the direction of the horn speaker constant, and there are fewer screws, so the horn speaker of this invention has significantly improved assembly efficiency and is easier to assemble using automated equipment. It will be the best one. Furthermore, in this embodiment, the outer circumferential edge of the annular member 28 is made to match the inner circumferential edge of the unit accommodating portion 14, and the outer circumferential edge of the plate plate 38 is made to match the inner circumferential edge of the annular member 28. Positioning is easy and work efficiency is further improved.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional horn speaker, Figure 2 is a schematic diagram of a conventional horn speaker.
The figure is a sectional view of the horn speaker according to this invention with the lid member removed, and FIG. 3 is an assembled view of the same horn speaker. 10... Horn outer cylinder, 12... Throat tool, 1
4...Unit housing section, 15...Middle cylinder, 16...
Inner cylinder, 20, 32... Drive unit, 44... Lid member.

Claims (1)

[Scope of utility model registration request] A unit accommodating portion having an open rear portion, wherein a throat tool is integrally formed on the rear inner surface of a horn outer cylinder having a sound emitting opening on the front surface, and an outer circumferential wall of the horn outer cylinder is further extended on the rear side of the throat. form,
A drive unit having a thickness approximately equal to the longitudinal dimension of the accommodation part is housed in this accommodation part, and the edge of the rear opening of the accommodation part is pressed to fix the drive unit to the rear surface of the throat tool. A horn speaker is made by combining a lid member with a horn speaker.