JP2759764B2 - Charger for 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 charger for charging a storage battery provided in a wireless microphone, which has a simple structure and prevents a short circuit accident even if a coin or the like is accidentally dropped. The present invention relates to a wireless microphone charger.

[0002]

2. Description of the Related Art As an example of a conventional charger for charging a storage battery provided in a wireless microphone of a karaoke apparatus or the like, two microphone-side electrodes for charging are provided on a lower end surface of a wireless microphone, and the charger is provided in the charger. A concave portion into which the lower end of the wireless microphone can be inserted is provided, and an electrode or a plunger is provided on the bottom surface of the concave portion at a position facing the microphone-side electrode so as to protrude or be exposed. There is a switch provided with a switch. Such a charger is configured such that when the wireless microphone is inserted into the charger and the switch on the bottom is turned on, a charging voltage is applied to the electrode or the plunger on the bottom of the concave portion to charge the storage battery.

Further, a cover is provided on the bottom surface of the concave portion of the charger so as to be lowered by the weight of the wireless microphone. When the cover is at the raised position, the electrode or plunger is buried in the cover. Some are designed to protrude from the cover. In such a charger, a wireless microphone is inserted into the charger,
When the cover is lowered by its own weight, the electrode or plunger on the charger side abuts on the microphone-side electrode to perform charging.

[0004]

In the conventional charger having a switch provided on the bottom surface of the above-described concave portion, it is expensive because of the provision of the switch, and the switch is frequently turned ON / OFF. The switch itself is liable to be deteriorated, and there is concern about the durable life of the charger.

Further, in a conventional charger using a cover which is lowered by its own weight of the wireless microphone, the cover is not necessarily moved up and down smoothly due to abrasion or the like, and the microphone side electrode is not used. A problem that the electrode or the plunger on the charger side protrudes from the cover easily occurs even though the electrode or the plunger on the charger side cannot be contacted or the wireless microphone is not inserted. A charging voltage is applied to the electrode or the plunger on the charger side, and a short circuit accident may occur when coins or the like are accidentally dropped into the concave portion of the charger.

The present invention has been made in view of the above circumstances of a conventional charger for a wireless microphone, and does not cause a short circuit accident even if a coin or the like is accidentally dropped.
Moreover, it is an object of the present invention to provide a wireless microphone charger that has a simple structure and a long durable life.

[0007]

To achieve the above object, a wireless microphone charger according to the present invention includes a storage battery and two microphone-side electrodes for charging the storage battery are provided on a lower end surface. A charger for a wireless microphone, the bottom surface of a concave portion opened upward so that a lower end portion of the wireless microphone can be inserted,
Plungers are respectively provided movably in the vertical direction facing the two microphone-side electrodes, and circuit boards each having two substrate-side electrodes whose lower ends face below these plungers are provided. One of the plungers is The first coil spring is elastically urged upward so that the upper end thereof protrudes from the bottom surface of the recess, and the other of the plungers is elastically moved upward by the second coil spring. The second coil is urged so that the upper end thereof projects from the bottom surface of the concave portion, and an insulating cylinder is inserted into the upper end of the other plunger so as to be relatively movable vertically. The other plan which is elastically urged upward by a third coil spring having a lower elasticity than a spring and protrudes from the bottom surface of the concave portion. None so as to cover the is protruded from the upper end of the catcher, the insertion of the wireless microphone,
Due to its own weight, the insulating cylinder body is moved downward relative to the other plunger against the elasticity of the third coil spring, and the two microphone-side electrodes are connected to the two plungers.
The two plungers are respectively brought into contact with the upper ends of the two plungers, and the two plungers are electrically connected to the substrate-side electrode via first and second coil springs, respectively, or the first and second plungers are weighed by the weight of the wireless microphone. The two plungers are moved downward against the resilience of the coil spring, and are brought into contact with the substrate-side electrode to be electrically connected.

An enlarged portion is provided at an intermediate portion between the two plungers, and an enlarged portion is provided at an intermediate portion between the two plungers. The one plunger regulates upward movement by the enlarged portion. The first coil spring is contracted between the enlarged portion and the circuit board; the other plunger is contracted the second coil spring between the enlarged portion and the circuit board; At the lower part of the insulating cylinder, an enlarged tube portion is provided to restrict upward movement by the enlarged tube portion, and the third coil spring is provided between the enlarged tube portion and the enlarged portion. It may be constructed by contracting.

Also, one microphone-side electrode is provided at the center of the lower end surface of the wireless microphone, the other microphone-side electrode is provided concentrically and annularly, and one plunger is provided at the center of the bottom surface of the recess. The other plunger may be provided at a position corresponding to a concentric circle of the other microphone-side electrode.

[0010]

According to the wireless microphone charger of the first aspect, when the wireless microphone is inserted into the concave portion, the insulating cylinder descends against the elasticity of the third coil spring, and the other plunger is moved. The upper end contacts the microphone-side electrode.
By setting the elasticity of the third coil spring to be stronger than the load of the coin or the like, even if the coin or the like is accidentally dropped and inserted into the concave portion, the insulating cylinder body is lowered by the elasticity of the third coil spring. No short circuit accidents occur. Moreover, the simple structure of the insulating cylinder and the third coil spring which are movably inserted in the other plunger in the up-down direction prevents a short circuit accident due to coins or the like.

In the wireless microphone charger according to the second aspect, an enlarged portion is provided in an intermediate portion of the plunger, and the first and second coil springs are reduced between the enlarged portion and the circuit board. The third coil spring is contracted between the enlarged portion of the cylindrical body and the enlarged portion of the plunger, so that the plunger and the insulating cylinder are pulled out upward. Is simple, and the assembly of any of the coil springs is also simple.

Further, in the wireless microphone charger according to the third aspect, the microphone-side electrode is provided annularly on the center of the lower end surface of the wireless microphone and concentrically therewith, and is provided between the center of the recess and the concentric circle. Since the plungers are provided at corresponding positions, the microphone-side electrode and the plunger can abut on the charger in any direction around the axis of the wireless microphone.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a longitudinal sectional view showing a state before the lower end of the wireless microphone is inserted into the charger.
FIG. 3 is a longitudinal sectional view showing a state where the lower end of the wireless microphone is inserted into the charger, and FIG. 3 is an external perspective view showing a state where the wireless microphone is inserted into the charger.

A charger 10 for a wireless microphone according to the present invention.
Is formed in a substantially beer barrel shape having a concave portion 12 opened upward, and the chargers 10, 10 are fitted and placed on a microphone stand 14 as shown in FIG. On the microphone stand 14, the mounted chargers 10, 10
An annular portion is provided by a pillar and an arm above. Then, a wireless microphone 16 having a grip portion having a substantially columnar shape is inserted into the recess 12 of the chargers 10 and 10 under the lower end portion of the wireless microphone 16 by penetrating the annular portion of the microphone stand 14. A rechargeable storage battery 18 such as a nickel-cadmium battery is charged.

One microphone-side electrode 20 is provided at the center of the substantially cylindrical lower end surface of the wireless microphone 16, and another microphone-side electrode 22 is provided in a ring around the center of the electrode. . The microphone-side electrodes 20 and 22 are respectively connected to the flexible substrates 2 housed in the wireless microphone 16.
4 so that the storage battery 18 is appropriately charged. Reference numerals 26, 26 ... denote infrared light emitting LEDs, which are driven by a carrier wave modulated by an audio signal to emit a signal based on infrared light. The case surrounding the infrared light emitting LEDs 26, 26,... Is a smoke-like translucent body, and is formed so as to attenuate only visible light without attenuating infrared light.

The concave portion 12 of the charger 10 has a shape in which the lower end of the wireless microphone 16 can be inserted smoothly and the position of the concave portion does not shift much when inserted. The plunger 3 is located at the center of the bottom surface of the recess 12 and at a position corresponding to the concentric circle of the annular microphone-side electrode 22.
0 and 32 are movably arranged in the vertical direction. An enlarged portion 30a, 32a is provided at an intermediate portion of these plungers 30, 32.
Are respectively formed. These plungers 30, 32
A circuit board 34 is disposed below the plunger 3.
Substrate side electrodes 36 and 38 are provided facing 0 and 32, respectively.

The plunger 32 disposed corresponding to the ring-shaped microphone-side electrode 22 has its upper end protruding from the bottom surface of the concave portion 12 by a predetermined length by the enlarged portion 32a of the intermediate portion, so that the plunger 32 is prevented from falling upward. . Then, the first coil spring 40 is contracted between the expanded portion 32a and the substrate-side electrode 38.

An insulating cylinder 42 is inserted into the upper end of the plunger 30 disposed at the center so as to be relatively movable in the vertical direction. At the lower end of the insulating cylinder 42, a cylindrical enlarged part 4 is provided.
2a is formed, and by the step of the cylindrical expanded portion 42a,
The upper end portion of the concave portion 12 is protruded from the bottom surface by a predetermined length to restrict upward removal. Then, the second coil spring 44 is contracted between the enlarged portion 30a and the substrate-side electrode 36. Further, a third coil spring 46 is contracted between the enlarged tube portion 42a and the enlarged tube portion 30a. The elasticity of the third coil spring 46 is set to be weaker than the elasticity of the second coil spring 44, and the plunger 3
The plunger 30 is lifted to a height at which the plunger 30 does not contact the substrate-side electrode 36 in a state where no downward force is applied to the zero and the insulating cylinder 42, and the upper end thereof is protruded from the bottom surface of the concave portion 12 by a predetermined length. The upper end of the insulating cylinder 42 protrudes from the bottom surface of the recess 12 longer than the protruding length of the plunger 30, and protrudes from the bottom surface of the recess 12.
Is configured to be covered by a protruding insulating cylinder 42. Moreover, the elasticity of the third coil spring 46 is set to, for example, 30 g or more, and is set so that the insulating cylinder 42 does not descend against the elasticity depending on the weight of coins or the like. The first and second coil springs 4
Reference numerals 0 and 44 may be made of a good conductor and have the same elasticity.

A casing of the charger 10 is vertically separable at an intermediate portion, and a guide portion 50 is provided in the upper half of the casing so that plungers 30, 32 are vertically movable below the bottom surface of the concave portion 12. A board fixing member 52 for fixing the circuit board 34 with screws or the like and a housing fixing member 54 for fixing the lower half of the housing with screws or the like with the circuit board 34 interposed therebetween are provided.

A commercial power supply is connected to the circuit board 34 by AC.
A power supply connector 56 to which a DC voltage converted by an adapter (not shown) or the like is supplied is provided toward the outside of the housing. Of course, the DC voltage applied via the connector 56 is appropriately processed by an electric circuit assembled on the circuit board 34 and applied to the board-side electrodes 36 and 38. Further, an LED 58 for display is mounted on the circuit board 34, and the circuit is configured so that the LED 58 is turned on during charging, for example, by appropriately detecting the magnitude of the charging current. The light of the LED 58 is visible from the outside of the housing via the light guide member 60.

In such a configuration, the wireless microphone 1
When the battery 6 is not inserted into the charger 10, the two plungers 30 and 32 protrude from the bottom surface of the recess 12, but the plunger 30 disposed at the center is covered by the insulating cylinder 42. Here, depending on the weight of the coin or the like, the insulating cylinder 42 does not descend due to the elasticity of the third coil spring 46, so that a short circuit accident due to the drop of the coin or the like does not occur.

The wireless microphone 16 is connected to the charger 1
In the state where the wireless microphone 16 is inserted into the wireless microphone 16, the weight of the wireless microphone 16 is about 300 g as an example, and the insulating cylinder 42 is lowered against the elasticity of the third coil spring 46 so that the upper end of the plunger 30 is disposed at the center. Microphone electrode 20
Contacted. The upper end of the other plunger 32 is also in contact with the annular microphone-side electrode 22. Further, the weight of the wireless microphone 16 causes the first and second coil springs 40 and 44 to bend in the contracting direction, and the plungers 30 and 32 to move.
Are in contact with the substrate-side electrodes 36 and 38, respectively.
Therefore, the plungers 30, 3 are separated from the substrate side electrodes 36, 38.
A voltage for charging is applied to the microphone-side electrodes 20 and 22 through the connection line 2. The plungers 30 and 32 do not necessarily need to be in contact with the substrate-side electrodes 36 and 38, and the first and second coil springs 4 are separated from the substrate-side electrodes 36 and 38.
A voltage may be applied to the plungers 30 and 32 via 0 and 44.

In the wireless microphone charger of the present invention having the above-described structure, a short-circuit accident caused by a coin or the like can be reliably prevented, and a vertically movable part is fitted and inserted into the shaft-shaped member. It is composed of a cylindrical member and a coil spring, and has a simple structure and extremely smooth vertical movement. In particular, even if the vertical movement is repeated frequently, the smooth movement is not impaired.

In the state where the wireless microphone 16 is inserted, the plungers 30, 32 are connected to the substrate-side electrodes 36, 38.
So that the first and second coil springs 4
If you want to set the elasticity of 0,44, the wireless microphone 1
The impact when the battery 6 is inserted into the charger 10 can be absorbed by the first and second coil springs 40 and 44, and damage to the circuit board 34 and the like is prevented.

In the above embodiment, the upward movement of one plunger 32 is regulated by the enlarged portion 32a of the intermediate portion. However, the present invention is not limited to this. The first end is fixed to the lower end of the plunger 32 and the other end is fixed to the circuit board 34.
Plunger 30 with natural length of coil spring 40
May be restricted. Similarly, the other plunger 32 may be restricted from falling upward by the natural length of the second coil spring 44. Similarly, one end of the third coil spring 46 is fixed to the insulating cylinder 42 and the other end is fixed to the other plunger 30, so that the natural length of the third coil spring 46 is Thus, the upward removal of the insulating cylinder 42 may be restricted.

Further, in the above embodiment, the insulating cylinder 42 and the third coil spring 46 are provided only on the plunger 30 disposed at the center, but the same configuration is applied to the other plunger 32. Is also good.

[0027]

As is apparent from the above description, since the wireless microphone charger of the present invention is constituted, the following special effects can be obtained.

In the wireless microphone charger according to the first aspect, one of the plungers protruding from the bottom surface of the concave portion of the charger is covered with an insulating cylinder, and the insulating cylinder is stronger than its own weight such as a coin. The elastic cylinder is elastically urged upward by the third coil spring set to elasticity, so that when the wireless microphone is inserted, the insulating cylinder descends against the elasticity of the third coil spring, and the microphone-side electrode is at the upper end of the plunger. However, even if a coin or the like is mistakenly dropped into the concave portion, the insulating cylinder does not descend and a short circuit accident due to the coin or the like does not occur. In addition, the structure of the present invention is composed of a plunger that can be moved up and down, an insulating cylinder and a coil spring that are inserted into the plunger, and has a simple structure, and can be used when a wireless microphone is inserted and when the wireless microphone is pulled up. The parts can be moved very smoothly. Furthermore, because of the simple structure, smooth movement is not impaired even if the wireless microphone is repeatedly inserted and pulled up frequently. Therefore, the wireless microphone charger of the present invention is most suitable as a charger for a commercial karaoke device or the like.

According to the second aspect of the present invention, the wireless microphone charger includes an enlarged portion provided at an intermediate portion of the plunger and an enlarged portion provided at a lower portion of the insulating cylinder.
Since it is configured so as to restrict upward removal, the structure is extremely simple, the assembly is easy, and it is suitable for mass production.

According to the third aspect of the present invention, the wireless microphone charger can be charged by inserting the wireless microphone in any direction around the axis with respect to the charger. Is extremely easy to operate.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a state before a lower end of a wireless microphone is inserted into a charger.

FIG. 2 is a longitudinal sectional view showing a state in which a lower end of a wireless microphone is inserted into a charger.

FIG. 3 is an external perspective view showing a state where a wireless microphone is inserted into a charger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Charger 12 Depression 16 Wireless microphone 18 Storage battery 20, 22 Microphone-side electrode 30, 32 Plunger 30a, 32a Enlarged portion 34 Circuit board 36, 38 Substrate-side electrode 40 First coil spring 42 Insulated cylinder 42a Enlarged cylinder 44 Second coil spring 46 Third coil spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-167768 (JP, A) JP-A-7-212887 (JP, A) JP-A-4-5795 (JP, U) (58) Survey Field (Int.Cl. ⁶ , DB name) H02J 7/00 301 H04R 1/04

Claims (3)

(57) [Claims] 1. A charger for a wireless microphone comprising a storage battery and two microphone-side electrodes for charging the storage battery provided on a lower end surface thereof, wherein a lower end portion of the wireless microphone can be inserted. Plungers are provided on the bottom surface of the concave portion opened upward so as to be vertically movable facing the two microphone-side electrodes, and two substrate-side electrodes whose lower ends face below these plungers are respectively provided. A circuit board is provided, and one of the plungers is elastically urged upward by a first coil spring so that an upper end of the plunger projects from the bottom surface of the concave portion. , Second
An elastic cylinder is elastically urged upward by the coil spring so that the upper end thereof is projected from the bottom surface of the concave portion, and the insulating cylinder body is vertically movable relative to the upper end of the other plunger. Is inserted, and the insulating cylinder is elastically urged upward by a third coil spring having a lower elasticity than the second coil spring to protrude from the upper end of the other plunger protruding from the bottom surface of the recess. The wireless microphone is inserted to move the insulating cylinder relatively downward with respect to the other plunger against the elasticity of the third coil spring due to its own weight by inserting the wireless microphone. The two microphone-side electrodes are respectively brought into contact with the upper ends of the two plungers, and the two plungers are respectively connected to a first and a second coil spring. Electrical connection is to the substrate side electrode through or the first by the weight of the wireless microphone,
And the two plungers are moved downward against the elasticity of the second coil spring so that the two plungers are brought into contact with the substrate-side electrodes to be electrically connected. vessel. 2. The charger for a wireless microphone according to claim 1, wherein an enlarged portion is provided at an intermediate portion between the two plungers, and the one plunger regulates upward movement by the enlarged portion. The first coil spring is contracted between the enlarged portion and the circuit board; the other plunger is contracted the second coil spring between the enlarged portion and the circuit board; At the lower part of the insulating cylinder, an enlarged tube portion is provided to restrict upward movement by the enlarged tube portion, and the third coil spring is provided between the enlarged tube portion and the enlarged portion. A wireless microphone charger characterized by being reduced in size. 3. The wireless microphone charger according to claim 1, wherein one of the microphone-side electrodes is provided at the center of a lower end surface of the wireless microphone, and the other of the microphone-side electrodes is provided concentrically and annularly. A charger for a wireless microphone, wherein one of the plungers is provided at the center of the bottom surface of the recess, and the other of the plungers is provided at a position corresponding to a concentric circle of the other microphone-side electrode.