Miniature speaker variable standoff mount

A miniature loud speaker mounted on a frame, the frame having prongs which fit into holes of a printed circuit board, the prongs having step changes which permit the speaker to be spaced an adjustable distance from the surface of the printed circuit board, and the frame and prongs formed together as one unified structure.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to the mounting of miniature speakers to 
printed circuit boards and more particularly to a miniature speaker 
mounted on a frame, the frame having stepped prongs to hold the speaker a 
distance from the printed circuit board. 
2. The Prior Art 
It is known in the prior art to have miniature speakers connected to 
printed circuit boards. For example, U.S. Pat. No. 4,420,706 discloses a 
connector assembly for a Piezoelectric transducer, which uses mounting 
clips which extend through printed circuit boards. However, there is no 
provision for the mounting clips to hold the speaker away from the board. 
U.S. Pat. No. 4,733,748 discloses a loudspeaker mounting device for a car 
radio which includes clamp brackets which have serrated tooth portions 
used to clamp the speaker down and hold it against a resilient pad. 
However, the purpose of the serrated tooth portions is to hold the speaker 
tightly flush against the mounting surface, not to hold the speaker away 
from the mounting surface. 
The prior art does not show a device for mounting a miniature speaker to a 
printed circuit board where the miniature speaker is spaced away from the 
mounting surface of the printed circuit board, which would allow the 
placement of other pieces of equipment underneath the speaker (between the 
speaker and the printed circuit board) as well as keeping the vibrational 
effects of the speaker away from the other equipment on the printed 
circuit board. Furthermore, it would be advantageous if the mounting 
device of the speaker could be manufactured as one part unified with the 
frame of the speaker. 
SUMMARY OF THE INVENTION 
It is the primary object of the present invention to overcome the problems 
of the prior art. 
It is a further object of the present invention to provide an improved 
miniature speaker for mounting onto a printed circuit board. 
It is a yet further object of the present invention to provide a mounting 
device for a miniature speaker which spaces the speaker away from the 
printed circuit board to which the speaker is mounted. 
It is yet another object of the present invention to provide a mounting 
device for a miniature speaker in which the frame of the speaker is formed 
as one piece with prongs which can be inserted into a printed circuit 
board to mount the speaker device. 
Another object is to provide a speaker frame constructed with one metal 
stamping which includes prongs for mounting or which includes prongs for 
mounting on a circuit board. Such a metalic stamping can also be flush 
mounted to a circuit board. 
The objects and features of the present invention set forth above and other 
objects and features can best be understood from a detailed description of 
a preferred embodiment of the invention selected for purposes of 
illustration and shown in the accompanying drawings:

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring now to the figures, and particularly FIG. 2, a speaker device 2 
adapted for mounting onto a printed circuit board as shown. Loudspeaker 4 
is electrically connected to a printed circuit board through wiring 6 into 
conductor wires 8 which electrically mate with connections located on the 
printed circuit board. 
Conductor wires 8 are mounted on the speaker frame by means of insulating 
bushings 9 which electrically isolate the metal frame from the speaker 
circuit wiring. The bushings 9 and wires 8 provide a stiff pin like 
connection to the circuit board. 
Loudspeaker 4 is attached to a frame which, in a preferred embodiment, 
comprises an inner ring member 10, a middle ring member 14, which is 
attached to inner ring member 10 by means of four connecting members 12, 
an outer ring member 16, and preferably three mounting prongs 18. 
Preferably all of the parts of the frame are stamped out of metal as one 
unified part. The frame may also be a plastic material or ceramic 
material. 
As can be seen from FIG. 1, loudspeaker 4 is attached to the inner ring 
member 10 of the frame, preferably permanently. 
The speaker device is secured to the printed circuit board 5 by means of 
the mounting prongs 18. In a preferred embodiment of the mounting prongs 
18, as shown in FIG. 2 and in more detail in FIG. 3, the prong is a 
stamped flat piece having a tip 20 which has a smaller cross-section than 
the cross-section of the prong in the area immediately adjacent, which 
comprises prong middle area 22 which, itself, is smaller in cross section 
than the cross section of the area of the prong 24 which is immediately 
adjacent to the speaker frame outer ring 16. Thus, the speaker device has 
two step changes 26 and 28 along its length. The two step changes 26 and 
28 are alternately usable for engaging the mounting surface of the printed 
circuit board. Thus, if a smaller radius hole 5a in the printed circuit 
board 5 is used, tip 20 is inserted into the hole and step change surface 
26 catches the mounting surface of the printed surface board holding the 
speaker device 2 in place yet maintaining a spacing between the speaker 4 
and the printed circuit board. The space can be filled by other parts as 
necessary. The spacing also keeps the vibrational effects of the speaker 4 
away from the surface of the printed surface board as well as other 
equipment. 
If a slightly larger hole is used in the printed surface board such as 
shown in FIG. 5b, both tip 20 and middle section 22 would go through the 
hole 7a and the prong would be caught at the surface of step change 28 
again holding the speaker device 2 in place with a smaller spacing between 
the speaker 4 and the printed circuit board 7, as shown in FIG. 3. If a 
slightly larger hole is used in the printed circuit board than tip 20 
middle section 22 and larger section 24 will all go through the hole and 
the frame would be caught at joining surface 30, leaving very little space 
between the mounting surface of the printed surface board and the 
loudspeaker 4. Finally, if the board hole is larger, the speaker can be 
flush mounted. 
Loudspeaker 4 preferably comprises a cone of water-proof paper composition 
or a cone of plastic although any composition could, of course, be used. 
FIG. 4 shows an alternative embodiment of a prong 34 in accordance with the 
present invention. In the alternative prong 34, there is only one step 
change 36 between the tip area 40 and the larger area of the prong 42. The 
operation of the second embodiment is exactly the same as the first 
embodiment except that one less hole size in the printed circuit board can 
be used thus making one less available spacing between the speaker and the 
printed circuit board possible as shown in FIG. 4. 
Of course it is also possible to use more than two-step changes if desired. 
It is also possible to have the step changes on both sides of the prong as 
shown in the drawings or only on one side. It is also possible to use, 
instead of the flat part shown in the drawings, a round prong or a prong 
of any desired geometric shape. 
In this invention at least one prong is shaped from a flat piece of metal 
and steps are cut into the edges of the metal whereby the prong has a 
uniform cross-section in one direction and a step in the other. 
Still further, in this invention the prong has a step change in 
cross-section wherein a flat surface created by said step changes engages 
the face of the PC board. 
In this invention, the prongs for mounting the speaker and the support for 
the conductor wires are co-stamped as a unified structure along with the 
frame. The frame stamping simultaneously creates the prongs and the 
support for the conductor wires along with the speaker frame. In this 
manner, the prongs and the support for the conductor wires are permanently 
attached to the frame because they are part of the frame. 
In FIG. 5a there is shown a PC boar having small size holes for engaging a 
first section of the two-step prong of the type shown in FIG. 3. In FIG. 
5b there is shown a second PC board section which includes larger holes 
which will accept the next step down as shown in FIG. 3. The next step 
down is the step indicated at reference numeral 28. 
The creation of a three-step prong is generally indicated at FIG. 3 where 
the surface 30 can be yet a further step in the prong thereby creating a 
joining surface at surface 30, and steps at surface 28 and surface 26. 
The loudspeaker of this invention is formed with the speaker frame during a 
stamping operation where the speaker frame is formed. 
The foregoing description of the specific embodiments will so fully reveal 
the general nature of the invention that others can, by applying current 
knowledge, readily modify and/or adapt for various applications such 
specific embodiments without departing from the generic concept, and, 
therefore, such adaptations and modifications should and are intended to 
be comprehended within the meaning and range of equivalents of the 
disclosed embodiments. It is to be understood that the phraseology or 
terminology employed herein is for the purpose of description and not of 
limitation.