JPS6316237Y2 - - 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 periphery of the throat tool, the middle cylinder 2 is connected to the peripheral edge of the throat tool with the screw 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 into the screw 7b. 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.

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,
Its outer peripheral edge 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. Furthermore, the outer peripheral edge of the plate 38 is formed in a shape that matches 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 to the rear surface of the throat tool 12 via a buffer body 31. 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 in this manner is assembled 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.

Since the horn speaker according to this invention has the outer cylinder 10, the throat tool, and the unit accommodating portion 14 integrally formed, the number of parts is small, and furthermore, the labor of assembling these parts, which was necessary in the conventional horn speaker, can be saved. In addition, the middle cylinder 15 and inner cylinder 1
6 and 6, the remaining assembly work can be done with the outer cylinder 10 placed on the workbench 54 with its sound emitting opening facing downward, so the assembly work can be done efficiently from the same direction. It is possible to improve the efficiency of assembly work and is ideal for automatic assembly by automatic equipment. Furthermore, in this embodiment, the height of the combined diaphragm structure 20 and magnetic circuit 32 is selected to be approximately equal to the height of the unit accommodating section 14, so that the lid member 44 can be attached to the unit accommodating section 14. This can be done by a simple operation of screwing the annular member 28 to the unit accommodating portion 14.
The plate plate 38
Since the outer peripheral edge of the annular member 28 is aligned with the inner peripheral edge of the annular member 28, positioning during assembly work can be easily performed. Therefore, in this embodiment, the efficiency of assembly work can be 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, 20, 32... Drive unit.

Claims (1)

[Scope of utility model registration request] A throat tool is integrally formed on the rear inner surface of the horn outer cylinder having a sound emitting opening formed on the front surface, and the rear peripheral edge of the horn outer cylinder is formed as an extension further behind the throat tool to accommodate a drive unit. A horn speaker characterized by forming.