Microphone with telescopic sound pickup means

A microphone having a telescopic sound pickup means includes a handle fitted with an adjusting knob provided with an internal spiral slide groove. By turning the adjusting knob, a pin may be brought by the spiral slide groove to slide upwardly and downwardly along a vertical slot formed in one side of the handle. The pickup head is therefore brought to perform telescopic actions by the displacement of the pin.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a microphone, and more particularly to a 
hand-held microphone with a telescopic sound pickup means. 
2. Description of the Prior Art 
Conventional hand-held microphones have fixed internal components, and the 
pickup effects of the microphone are directly affected by the distance 
from the sound source to the head of the microphone. In singing or 
speaking, when a user holds the microphone at quite a distance from 
his/her mouth or if his/her voice is too low, the pickup effects of the 
microphone will be poor. It is therefore necessary for the user to hold 
the microphone near to his/her mouth, which may make the user quite 
uncomfortable since he/she may not used to holding the microphone near the 
mouth. 
SUMMARY OF THE INVENTION 
A primary object of the present invention is to provide a microphone with a 
sound pickup means capable of telescopic actions, in which an adjusting 
knob provided on a handle may be turned to cause the sound pickup means to 
displace upwardly or downwardly to ensure good pickup effects.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
With reference to FIGS. 1 and 4, a preferred embodiment of the present 
invention basically comprises a hollow handle 11, a sound pickup means 2 
fitted into the hollow of the handle 11, an adjusting knob 3 fitted onto 
the handle 11 for adjusting the height of the sound pickup means 2 inside 
the handle 11, a ring 12 locked onto the handle 11 for limiting the 
movement of the adjusting knob 3, and a cap 13 located above the ring 12. 
FIG. 2 illustrates the inter-relationship among the above-mentioned 
components of the microphone structure according to the present invention. 
The handle 11 has a stair-shaped shaft 111 at an upper portion thereof for 
receiving the adjusting knob 3 which turns thereon. The shaft 111 is 
provided with a vertical slot 112 in one side thereof and a slide seat 113 
at a top end thereof for receiving a hollow movable sleeve 21 of the sound 
pickup means 2 and for slidable movement thereon. The slide seat 113 has 
external threads 114 for securing the ring 12 and the cap 13. 
The sound pickup means 2 consists of a head 22 which is fitted into the 
movable sleeve 21 by means of a soft pad 221 at the bottom side thereof. 
The movable sleeve 21 is provided with a flange 211 at its apical end and 
a screw hole 212 near the bottom end thereof. When the movable sleeve 21 
of the sound pickup means 2 is slipped into the slide seat, a pin 23 may 
be used to pass through the slot 112 to be locked within the screw hole 
212 so that the sound pickup means 2 may be secured on the handle 11 and 
may slidably displace upwardly and downwardly inside the slide seat 113. 
The adjusting knob 3 is an annular structure with vertical corrugations on 
its outer circumferential surface. The inner wall of the adjusting knob 3 
is configured to have a spiral slide groove 31 along which the pin 23 may 
slide to enable the adjusting knob 3 to be screwably fitted onto the shaft 
111. The ring 12 has an inner projecting ring which is provided with 
internal threads 121. By means of the internal threads 121 which engage 
with the external threads 114 of the handle 11, the ring 12 is capable of 
restraining the displacement of the adjusting knob 3 due to the 
counter-action of the pin 23. The cap 13 is a polygonal hollow structure 
with a spherical mesh top. Internal threads 131 are provided at a bottom 
portion of the cap 13 for engaging the external threads 113 of the handle 
11 and thereby coupling with the ring 12. The cap 13 is provided to 
protect the internal structure of the microphone of the present invention. 
FIGS. 3A-1 through 3B-2 illustrate the telescopic actions of the sound 
pickup means 2 of the microphone according to the present invention. As 
shown in FIG. 3A-1, when the user turns the adjusting knob 3 in a 
clockwise direction, the pin 23 disposed in the slot 112 will be pushed 
upwardly along the spiral groove 31 of the adjusting knob 3, so that the 
sound pickup means 2 projects in the direction of the upper portion of the 
handle 11. As shown in FIG. 3B-1, when the user turns the adjusting knob 3 
in a counter-clockwise direction, the pin 23 disposed in the slot 112 will 
be pushed downwardly along the spiral groove 31 of the adjusting knob 3 so 
that the sound pickup means 2 retracts in the direction of the lower 
portion of the handle 11. 
FIG. 5 shows another preferred embodiment of the microphone with telescopic 
sound pickup means which comprises a spiral block 61 with a spiral upper 
surface 611 which rises from a lower position to a higher position to 
create a difference in height in the upper surface, so that the sound 
pickup means 5 may slidably displace upwardly and downwardly along the 
spiral upper surface 611. With further reference to FIG. 6, a handle 4 has 
an interior provided with a first hollow 44 and a second hollow 45 of 
different diameters. A bottom side of the first hollow 44 forms a 
substantially planar support 42 for receiving the spiral block 61 which 
may turn clockwisely or counter-clockwisely thereon. The first hollow 44 
is further provided with two slide rails 441 disposed on opposite sides 
thereof at suitable positions for receiving two lugs 514 formed on the 
outer periphery of a bottom portion of a movable sleeve 51. The movable 
sleeve 51 is hence located above the spiral block 61 in the first hollow 
44 such that a steel ball 512 on a rod 511 at a bottom side of the movable 
sleeve 51 is in contact with the spiral upper surface 611. When the spiral 
block 61 is turned, the movable sleeve 51 is therefore caused to slidably 
displace upwardly and downwardly. The movable sleeve 51 is further 
provided with a projecting ring 513 on an outer surface at a middle 
section thereof. A spring 72 is fitted above the projecting ring 513 on 
the outer surface of the movable sleeve 51. Besides, a ring 71 is fitted 
around the spring 72 for restricting the spring 72 on an inner wall of the 
second hollow 45 so that the spring 72 may exert pressure on the movable 
sleeve 51 which may keep contact with the spiral upper surface 611 to a 
certain extent for ensuring the downward displacement of the movable 
sleeve 51 along the spiral supper surface 611. Furthermore, a central hole 
9 is formed in the movable sleeve 51, the spiral block 61 and the handle 4 
respectively through which an electrical wire of a sound pickup head 52 of 
the movable sleeve 51 may pass. The first hollow 44 of the handle 4 is 
additionally provided with a horizontal slot 41 at a suitable position in 
a bottom portion thereof such that a trigger lever 62 may pass through the 
slot 41 to be locked onto one side of the spiral block 61. When the 
trigger lever 61 is turned to displace horizontally within the slot 41, 
the spiral block 61 may be caused to displace clockwisely or 
counter-clockwisely, pushing the movable sleeve 51 thereabove to slidably 
displace upwardly and downwardly on the spiral upper surface 611, 
achieving the telescopic effect of the sound pickup means 5. 
Although the present invention has been illustrated and described with 
reference to the preferred embodiment thereof, it should be understood 
that it is in no way limited to the details of such embodiment but is 
capable of numerous modifications within the scope of the appended claims.