JP2019186612A - Wireless microphone antenna attachment and detachment mechanism - Google Patents

Abstract

To provide a wireless microphone antenna attachment and detachment mechanism capable of detaching an antenna using a jig G with a simple structure without exposing a fixed part of the antenna and handle to the outside.SOLUTION: An antenna mounting unit 21 is provided at an end of a handle 2 of a wireless microphone. A cover 4 covers the antenna mounting unit 21. A jig insertion hole 42 is provided in the cover 4. A long rod-shaped antenna 3 is provided separately from the handle 2 of the wireless microphone. A joint 31 is provided at one end of the antenna 3. Engaging units 32a, 32b are provided on the joint 31. The engaging units 32a, 32b are movable in an axial direction of the handle 2 with respect to the jig G and are engaged with the jig G in a rotary direction centered on the axial direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an antenna attaching / detaching mechanism for a wireless microphone.

  Many wireless microphones have a built-in antenna for transmission and reception at the handle. However, when an antenna is built in the handle, there is a possibility that a necessary antenna length cannot be obtained, or that the outer casing of the handle shields radio waves and deteriorates transmission / reception performance. In order to improve this point, as shown in Patent Document 1, a wireless microphone is proposed in which an antenna extending along the axial direction of the handle is fixed to the end of the handle opposite to the microphone head.

Japanese Patent Laid-Open No. 10-200990

  Certainly, although the wireless microphone as described above has the advantage that the desired antenna performance can be obtained because the antenna is exposed to the outside of the handle, there are the following problems in actual use. It was.

(1) The handle and the antenna are generally fixed by screwing a tightening nut or a female screw fixed to the antenna into a male screw provided on the handle. However, in the prior art, since this type of handle and the fixed part of the antenna are exposed to the outside, when the microphone is used, an external force is easily applied to the fixed part of the antenna, and the fixed part is easily damaged.

(2) The antenna provided in the microphone is selected according to a certain standard in order to ensure a predetermined transmission / reception performance. However, if the fixed part is exposed, the user can easily use the existing antenna. There is a possibility to replace the antenna with a non-standard antenna. On the other hand, if the fixed portion is provided inside the handle, inappropriate replacement can be avoided, but it becomes difficult to remove the antenna from the microphone when repairing or replacing the antenna in conformity with the standard.

  The present invention has been proposed in order to solve the above-described problems of the prior art. An object of the present invention is to provide an antenna attaching / detaching mechanism for a wireless microphone in which a fixed portion is not exposed to the outside and an antenna can be detached using a jig having a simple structure.

The antenna attachment / detachment mechanism of the wireless microphone of the present invention has the following configuration.
(1) An antenna mounting portion provided at the end of the handle of the wireless microphone.
(2) A cover that covers the antenna mounting portion.
(3) A jig insertion hole provided in the cover in a direction crossing the axial direction of the handle.
(4) A long rod-shaped antenna provided separately from the handle of the wireless microphone.
(5) A joint provided at one end of the antenna.
(6) An engaging portion that is provided in the joint and is movable in the axial direction of the handle with respect to the jig, and engages with the jig in a rotation direction centered on the axial direction.
(7) The jig insertion hole is sized so that an antenna attaching / detaching jig can be inserted into the opening.
(8) The rod-shaped antenna is provided in the axial direction of the jig, and is longer than the axial length of the cover handle.
(9) The joint has an outer diameter that can be inserted into the opening together with the antenna, and is attached to and detached from the antenna mounting portion by movement in a rotational direction around the axial direction of the handle.

The present invention also includes the following aspects.
(1) The cover is rotatably attached to the handle by a shaft and a bearing provided in a direction orthogonal to the axial direction of the handle, and the antenna fixed to the handle is placed in the jig insertion hole. In the inserted state, rotation of the cover is prevented by the antenna.
(2) A member that closes a gap between the opening and the antenna is provided.
(3) The antenna mounting portion and the joint are a male screw and a female screw that are fastened by movement in a rotational direction around the axial direction of the handle.

  According to the present invention, since the antenna fixing portion is covered with the cover, it is difficult to apply an external force to the antenna fixing portion when the microphone is used, and damage to the fixing portion can be prevented. With the cover attached, the jig can be inserted into the cover and the joint can be rotated to remove the antenna, so that the antenna can be easily replaced or repaired. Unless a special jig is used, the antenna cannot be replaced unless a troublesome operation such as removing the cover is performed. Therefore, it is difficult for the user to inadvertently replace the antenna. As a result, the possibility of inconvenience such as replacement with a nonstandard antenna decreases.

The perspective view which shows the assembly state of the wireless microphone of 1st Embodiment. The disassembled perspective view of the wireless microphone of 1st Embodiment. Sectional drawing which shows the structure of the antenna and coupling in 1st Embodiment. The perspective view which shows the other structure of a coupling and an antenna attachment part.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In the present embodiment, the axial direction refers to the axial direction of the microphone handle unless otherwise defined.
[1. First Embodiment]
(1) Configuration As shown in FIG. 1, the wireless microphone of the present embodiment is fixed to the microphone head 1, the handle 2, and the axial end of the handle 2, specifically, the end opposite to the microphone head 1. The antenna 3 is provided.

  A cover 4 that covers a fixed portion between the handle 2 and the antenna 3 is provided at the end of the handle 2 opposite to the microphone head 1. The cover 4 is a box-shaped member having a hollow inside. The cover 4 is provided so as to protrude from the end of the handle 2 by a dimension L1 longer than the length L2 of the joint 31 described later. In the present embodiment, a protruding portion 41 that covers a part of the handle 2 is integrally provided at a portion of the cover 4 on the microphone head side. A jig insertion hole 42 is provided on the end surface of the cover 4. The jig insertion hole 42 is used to insert the jig G for attaching / detaching the antenna, opens in a direction intersecting with the axial direction of the handle 2, and has a size in which the jig G can be inserted.

  The cover 4 is attached to the handle 2 so as to be openable and closable by fitting a bearing 43 on the cover 4 side so as to be rotatable with respect to a shaft 22 provided on the handle 2. The shaft 22 and the bearing 43 are provided in a direction orthogonal to the axial direction. The cover 4 is provided with a screw hole 44, and the handle 2 and the cover 4 are fixed by screwing a set screw 45 into the screw hole 44 from the opposite side to the handle 2.

  The antenna 3 is a long bar-like member provided separately from the handle 2. At the end of the handle 2 on the antenna 3 side, a cylindrical antenna mounting portion 21 having a male screw on the outer periphery is provided. Although not shown, a signal line connector extending in the axial direction is provided at the center of the antenna mounting portion 21, and a plug provided at the end of the antenna 3 is inserted into this connector. The electric circuit in the handle 2 and the signal line of the antenna 3 are electrically connected.

  A cylindrical joint 31 is rotatably fitted on the outer periphery of the end of the antenna 3 on the handle 2 side. The joint 31 is a member shorter than the antenna 3 and has an outer diameter that can be inserted into the jig insertion hole 42 of the cover 4. An internal thread is provided at the end of the joint 31 on the handle 2 side, and the internal thread is fastened to an external thread on the outer periphery of the antenna mounting portion 21. That is, the male screw of the antenna attachment portion 21 and the female screw of the joint 31 are screwed together by movement of the joint 31 in the rotation direction about the axial direction, and the joint 31 is attached to and detached from the antenna attachment portion 21. Engagement parts 32a and 32b are provided on the part of the joint 31 opposite to the handle 2 by forming two opposing outer peripheral surfaces of the cylindrical joint 31 in parallel planes. A step portion 33 is formed on the handle 2 side of the engaging portions 32a and 32b, and the edge of the engaging portion 32a and 32b is exposed in parallel to the portion on the opposite side to the step portion 33 and is recessed from the outer peripheral surface of the joint 31 It is out.

  The joint 31 is fitted on the outside of the antenna 3 so as to be rotatable about the axial direction. On the other hand, as schematically shown in FIGS. 3 (a) and 3 (b), a flange 34 that spreads outward is provided on the outer periphery of the antenna 3. The antenna 3 cannot move in the axial direction of the joint 31 by engaging in a groove 31b formed on the inner periphery of the joint 31. For this reason, when the joint 31 is fastened to the antenna mounting portion 21 provided on the handle 2, the antenna 3 can move in the rotational direction but cannot move in the axial direction.

  The jig insertion hole 42 provided in the cover 4 has a larger outer diameter than the thickness of the jig fitted into the outside of the antenna 3. Therefore, a gap is formed between the position of the jig insertion hole 42 and the outer periphery of the antenna 3 when no jig is inserted into the jig insertion hole 42, that is, in a normal microphone use state. In the present embodiment, a member that closes the gap between the edge of the jig insertion hole 42 and the outer periphery of the antenna 3, for example, a decorative bush 51 and an O-ring 52 is provided.

  The jig G is a cylindrical member having an insertion hole for the antenna 3 at the center. The outer diameter of the main body portion is a dimension that can be inserted into the jig insertion hole 42 provided in the cover 4. A pair of protrusions are provided at the tip of the jig, that is, the end on the handle 2 side, and these protrusions are sandwiched from the outside to the two engaging portions 32 a and 32 b provided on the outer periphery of the joint 31. Inset. A knob Gc having a diameter larger than that of the jig body is provided at the opposite end of the jig G.

(2) Operation The operation of the present embodiment is as follows.
In order to fix the antenna 3 to the handle 2, the cover 4 is rotated about the shaft 22 and the bearing 43 in advance so that the antenna mounting portion 21 is covered with the cover 4. In this state, the antenna 3 is inserted into the jig insertion hole 42, and the pair of protrusions Ga and Gb at the tip of the jig are fitted into the two engaging portions 32a and 32b of the joint 31. At this time, the tip of the jig G abuts on the end of the joint 31, whereby the jig G and the joint 31 are positioned, and the protrusions Ga and Gb of the jig G are securely attached to the engaging portions 32a and 32b. Get stuck.

  Thereafter, the antenna 3, the joint 31 and the jig G combined into one are inserted into the jig insertion hole 42 of the cover 4, and the female screw at the tip of the joint 31 is matched with the male screw of the mounting portion 21. And the coupling 31 is rotated by rotating the knob Gc of the jig | tool G which has come out of the cover 4, the male screw and the female screw are fastened, and the coupling 31 and the attachment part 21 are fixed. When the joint 31 and the mounting portion 21 are fixed, the antenna 3 is provided so as not to move in the axial direction with respect to the joint 31, and as a result, the antenna 3 is fixed to the end of the handle 2. In this state, the jig G is pulled out from the outside of the antenna 3, and the O-ring 52 and the decorative bush 51 are fitted into the gap between the antenna 3 and the jig insertion hole 42, thereby completing the mounting of the antenna 3.

  When the antenna 3 is removed from the handle 2 or the cover 4 is opened, the jig G is inserted outside the antenna 3 with the O-ring 52 and the decorative bush 51 removed, as opposed to when the antenna 3 is fixed. Then, the jig G is rotated with the knob Gc in a state where the protrusion at the tip of the jig G is fitted into the engaging portions 32 a and 32 b of the joint 31. Thereby, the fastening of the joint 31 and the attachment portion 21 is loosened, and the antenna 3 is removed from the handle 2. When the antenna 3 is removed from the handle 2, the antenna 3 does not exist in the jig insertion hole 42 of the cover 4, so that the cover 4 can be rotated around the shaft 22 and the bearing 43, and the set screw 45 is attached. The cover 4 can be opened by removing it.

(3) Effects According to the present embodiment, the following effects are exhibited.
(1) The antenna 3 can be easily removed by removing the decorative bush 51 and the O-ring 52 without removing the cover 4, inserting the jig G from the jig insertion hole 42, and rotating the joint 31. On the other hand, since it is impossible for a user or the like who does not have the jig G to remove the antenna 3, it is easy to use for a worker who performs repair or replacement work, and prevents an unauthorized user from inadvertently replacing the antenna 3 Therefore, it becomes possible to demonstrate the prescribed performance as a wireless microphone.

(2) Since the cover 4 is attached to the handle 2 so as to be rotated by the shaft 22 and the bearing 43, the cover 4 is attached to the antenna 3 even if the set screw 45 is removed in a state where the antenna 3 is attached to the handle 2. Cannot get in the way and turn. Therefore, the cover 4 cannot be obtained unless the antenna 3 is removed using a jig G as shown in the figure. Therefore, the cover 4 is opened and the electronic circuit of the handle 2 is touched, or the joint 31 is rotated to rotate the antenna 3. Cannot be removed. As a result, it is possible to prevent inadvertent remodeling by the user and the occurrence of failure associated therewith.

(3) The jig G for rotating the joint 31 of the present embodiment has an insertion hole of a size capable of inserting the antenna 3 at the center, and the outer diameter is the jig insertion hole 42 provided in the cover 4. The inner diameter of the joint 31 is smaller than the inner diameter, and a protrusion adapted to the engaging portions 32a and 32b provided on the joint 31 is provided at the tip. Since such a jig G is generally not commercially available and has a special shape, the user cannot rotate the joint 31 from the outside of the cover 4 using a commercially available screwdriver or the like.

[2. Other Embodiments]
The present invention is not limited to the above-described embodiment, and includes other embodiments as follows, for example.
(1) The antenna mounting portion 21 and the joint 31 are not limited to a structure that is screwed. For example, as shown in FIG. 4, a structure in which a pin 21 a is provided on the outer periphery of a cylindrical antenna attachment portion 21 and an L-shaped groove 31 c is provided in a cylindrical joint 31 fitted on the outside of the antenna attachment portion 21. Can be adopted. In this structure, the cylindrical joint 31 is fitted into the columnar antenna mounting portion 21 so that the pin 21a enters the portion of the L-shaped groove 31c extending along the axial direction of the handle 2. Thereafter, the antenna 3 is fixed to the handle 2 by rotating the cylindrical joint 31 about the axis of the handle 2 to engage the pin 21a with the circumferentially extending portion of the L-shaped groove 31c. To do.

(2) The shape of the cover 4 is not limited to that shown in the figure, and may be a simple box-shaped member that does not have the protruding portion 41. When the cover 4 cannot be easily removed from the handle 2 by a structure different from that shown in the figure, the cover 4 is not opened and closed by the shaft 22 and the bearing 43 provided in the direction orthogonal to the axial direction. The cover 4 may be fixed to the handle 2 by fitting or screwing.

(3) When the antenna 3 is fixed to the mounting portion 21 on the handle 2 side by the joint 31, if a part of the cover 4 is sandwiched between the joint 31 and the end of the handle 2, the jig G The cover 4 cannot be opened unless the antenna 3 is removed. If it does in this way, it becomes impossible for the user who does not have the jig | tool G to perform replacement | exchange of the antenna 3 or repair of the electronic device inside the cover 4 without permission, and the inadvertent damage of a microphone can be prevented.

(4) The joint 31 is not limited to a member having a pair of engaging portions 32a and 32b as shown in the figure, and a square tubular member such as a hexagon nut can also be used.

DESCRIPTION OF SYMBOLS 1 ... Microphone head 2 ... Handle 3 ... Antenna 4 ... Cover 21 ... Antenna attachment part 22 ... Shaft 31 ... Joint 31a ... End surface 31b ... Groove 32a, 32b ... Engagement part 33 ... Step part 34 ... Flange 41 ... Protrusion part 42 ... Jig insertion hole 43 ... bearing 51 ... decorative bushing 52 ... O-ring G ... jig Ga, Gb ... projection Gc ... knob

Claims (4)

An antenna mounting portion provided at the end of the handle of the wireless microphone;
A cover covering the antenna mounting portion;
A jig insertion hole provided in the cover in a direction intersecting the axial direction of the handle;
A long rod-shaped antenna provided separately from the handle of the wireless microphone;
A joint provided at one end of the antenna;
Provided in the joint, is movable in the axial direction of the handle with respect to the jig, and includes an engaging portion that engages with the jig in the rotation direction around the axial direction,
The jig insertion hole is sized so that an antenna attaching / detaching jig can be inserted into the opening,
The rod-shaped antenna is provided in the axial direction of the jig, and is longer than the axial length of the handle of the cover,
The wireless microphone characterized in that the joint has an outer diameter that can be inserted into the opening together with the antenna, and is attached to and detached from the antenna mounting portion by movement in a rotational direction around the axial direction of the handle. Antenna attachment / detachment mechanism.   The cover is rotatably attached to the handle by a shaft and a bearing provided in a direction perpendicular to the axial direction of the handle, and the antenna fixed to the handle is inserted into the jig insertion hole. The wireless microphone antenna attaching / detaching mechanism according to claim 1, wherein in the state, the cover is prevented from rotating by the antenna.   The wireless microphone antenna attaching / detaching mechanism according to claim 1, further comprising a member that closes a gap between the opening and the antenna.   The antenna of the wireless microphone according to any one of claims 1 to 3, wherein the antenna attachment portion and the joint are a male screw and a female screw that are fastened by movement in a rotational direction centering on an axial direction of the handle. Detachable mechanism.

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