JP2578495Y2 - Wireless microphone - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless microphone suitable for use in, for example, a karaoke apparatus, which can transmit a signal from a remote place to the main body.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a wireless microphone. In FIG. 5, reference numeral 1 denotes a battery case serving as a grip portion, a power switch 2 for turning on / off the power is provided on the outer periphery of the upper center, and a rechargeable battery, a transmission circuit, and the like are housed inside. . Reference numeral 3 denotes a cover attached to the upper end of the battery case 1, which is, for example, in a mesh shape. Reference numeral 5 denotes a tail cap, which is attached to a battery / substrate case attached to the lower end of the battery case 1 (not shown).

When the power switch 2 is turned on, the wireless microphone configured as described above can transmit an audio signal to, for example, the main body of the karaoke apparatus. Singing, a singing voice can be output from a speaker installed near the main body or the like.

FIG. 6 is an enlarged perspective view showing a main part of a conventional wireless microphone, and FIG. 7 is an enlarged perspective view showing the wireless microphone shown in FIG. Or, the same reference numerals are given to the corresponding parts, and the description is omitted. In these figures, reference numeral 11 denotes a battery which is attached to the lower end of the battery case 1 so as to protrude therefrom.
It shows a substrate case, which is mostly smaller in diameter than the battery case 1.

[0005] Reference numeral 11a denotes a first terminal receiving portion provided at the center of the battery / substrate case 11, 11b denotes a first groove formed on the outer periphery of the first terminal receiving portion 11a, 11a
c is a second terminal receiving portion provided around the outer periphery of the first groove portion 11b, and 11d is a second terminal receiving portion 11c.
Shows a second groove portion provided around the outer periphery of
The second groove 11d has first to fourth projecting portions 11 projecting in a cross shape into a part of the second terminal receiving portion 11c.
d ₁ , 11d ₂ , 11d ₃ and 11d ₄ are provided. 11e denotes a step formed around the lower end of the battery / substrate case 11, and 11f denotes an antenna insertion part connected to the step 11e.

Reference numeral 12 denotes a first terminal serving as a-(minus) terminal, and the circular portion 1 abuts on the first terminal receiving portion 11a.
2a and the first groove 11
one or both are inserted into b is the secondary battery - is composed of a connecting portion 12b _1, 12b ₂ connected to the terminal. Reference numeral 13 denotes a second terminal serving as a positive terminal, which comes into contact with the second terminal receiving portion 11c, and has a circular portion 12a of the first terminal 12.
And an annular portion 13a located on the outer periphery of the second groove portion 11d or the first projecting portion 11
is inserted into the d ₁ is composed of a connecting portion 13b which is connected to the positive terminal of the secondary battery.

Reference numeral 14 denotes an antenna, which includes a coil portion 14a mounted on the step portion 11e of the battery / substrate case 11, a connection portion 14b inserted into the antenna insertion portion 11f and connecting the coil portion 14a to the transmission circuit. It is composed of The tail cap 5 attached to the battery / substrate case 11 is provided with a hole 5a for exposing the first and second terminals 12, 13.

When the wireless microphone constructed as described above is attached (placed) to a charger for charging a built-in secondary battery, the first and second terminals 1
Since 2 and 13 are connected to the-and + terminals of the charger, the secondary battery can be charged. In addition, since the signal can be transmitted from the built-in antenna 14, it can be used for the applications described above.

[0009]

Since the conventional wireless microphone is configured as described above, the first and second terminals for charging the built-in secondary battery are provided.
In addition to the first and second terminals 13, an antenna 14, which is a separate component from the first or second terminals 12, 13, is required. Therefore, the number of parts is increased and the structure is complicated, and the number of assembling steps is increased so that there is a disadvantage that the manufacturing cannot be easily performed.

Also, for example, the first and second terminals 12 and 13 disposed near the antenna 14 may affect the impedance of the antenna 14. This invention was made in order to solve the above-mentioned inconveniences.In addition to reducing the number of parts, the structure can be simplified and the cost can be reduced. To provide.

[0011]

Means for Solving the Problems] wireless microphone according to the invention, in order to achieve the above object, the ring having a pair of terminals for charging a built-in rechargeable battery
In an earless microphone, one of the pair of terminals
Is a substantially C-shaped annular plate surrounding the other terminal,
Use a substantially C-shaped annular plate as an antenna.
It is a thing.

[0012]

[Function] The wireless microphone in this invention is:
With the above structure, one terminal functions as an antenna.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged perspective view showing a main part of a wireless microphone according to one embodiment of the present invention, and FIG. 2 is an enlarged perspective view showing the assembled wireless microphone according to one embodiment of the present invention shown in FIG. The same reference numerals are given to the same or corresponding parts as in FIG. 7 and the description is omitted.

In these figures, reference numeral 13A denotes a second terminal serving as a positive terminal, which is in contact with the second terminal receiving portion 11c of the battery / substrate case 11, and which has a circular portion 12a of the first terminal 12.
together located on the outer periphery of a, an annular portion 13a slit 13a ₁ is provided, this depends from the annular portion 13a, the inserted and the secondary battery a second groove 11d or the first projecting portion 11d ₁ + a first connecting portion (ground terminal portion) 13b connected to the terminal, the depending from the annular portion 13a, is connected to the second groove portion 11d or the second is inserted into the protruding portion 11d ₂ and the transmission circuit 2 connection portions (hot terminal portions) 13c. In terms of high frequency, the first connection portion 13b corresponds to a ground terminal, and the second connection portion 13c corresponds to a hot terminal.

FIG. 3 is a block diagram showing a part of the circuit of the wireless microphone shown in FIGS. 1 and 2, and FIG.
FIG. 4 is an explanatory diagram showing connection of the circuit shown in FIG. In these figures, AMP is a power amplifier for amplifying high frequency, BPF
The band-pass filter, C ₁ that passes a predetermined frequency power amplifier AMP outputs show a first capacitor, one end is connected to a band-pass filter BPF.

[0016] ANT denotes an antenna, is connected to a first end of the capacitor C _1, corresponding to a portion of the second terminal portion 13A. L indicates an inductance, and one end is connected to a connection point between the _first capacitor C1 and the antenna ANT. C ₂ denotes a second capacitor, one end of which is connected to the other end of the inductance L.

[0017] 4 shows a chargeable secondary battery housed in the battery case 1, the inductance L and the first to the positive terminal is connected connection part 13b connected to the connection point between the second capacitor C ₂ The negative terminal is connected to the first terminal 12. The antenna ANT, the inductance L and the second capacitor C ₂ is constituted by the second terminal 13A.

When the second terminal 13A is formed as described above, one-tenth of the wavelength λ to be resonated corresponds to the diameter D of the annular portion 13a.
Can be shared. Then, the second terminal 13A
Since the formation of the slit 13a ₁ and the second connection portion 13c, a well as the structure parts becomes small becomes simple and inexpensive manufacture is simplified even fewer assembly steps.

In the above embodiment, the second terminal 1
Although the description has been given of the example in which the first connection portion 13b of 3A is connected to the + terminal of the secondary battery 4, the second connection portion 13c is
The same effect can be obtained by connecting to the + terminal.
Also, although the description has been given of the example in which the antenna ANT is also used for the second terminal 13A, the antenna is also used for the first terminal 12 by forming the first terminal 12 in the same shape as the second terminal 13A. Can be done.

[0020]

As described above, according to the present invention, one of a pair of terminals for charging the built-in secondary battery is provided with a hot terminal portion, and the antenna is also used, so that the number of parts is reduced. In addition, the structure is simple and inexpensive, and the number of assembling steps is reduced so that the manufacturing is simplified.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing a main part of a wireless microphone according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the wireless microphone according to the embodiment of the present invention shown in FIG. 1;

FIG. 3 is a block diagram showing a part of a circuit of the wireless microphone shown in FIGS. 1 and 2;

FIG. 4 is an explanatory diagram showing connection of the circuit shown in FIG. 3;

FIG. 5 is a perspective view showing a wireless microphone.

FIG. 6 is an enlarged perspective view showing a main part of a conventional wireless microphone.

FIG. 7 is an enlarged perspective view showing the wireless microphone shown in FIG. 6 in a partially assembled state.

[Explanation of symbols]

1 battery case 2 power switch 3 cover 4 battery 5 tail cap 11 cell-substrate case 12 first terminal 12a circular portion 12b _1, 12b ₂ connected portion 13A second terminal 13a annular portion 13a ₁ slits 13b first Connection part 13c Second connection part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 1/034 H01Q 1/44

Claims (1)

(57) [Scope of request for utility model registration] 1. A wireless microphone having a pair of terminals for charging a built-in secondary battery, wherein one of the pair of terminals is substantially C-shaped surrounding the other terminal.
And the substantially C-shaped annular plate is referred to as an antenna.
A wireless microphone characterized by being used as a wireless microphone.