JPH01202901A - Antenna fixing structure - Google Patents

Abstract

PURPOSE:To stably keep the reception sensitivity by providing a pipe to fix a loop antenna to a tail lock connecting ends of a wrist band fixing a radio set to a wrist mutually. CONSTITUTION:The pipe 6 to fix a loop antenna 2 is provided on the side of the tail lock 5. A raw material such as a plastic is used for the pipe 6 to allow the loop antenna 2 to be put in or out easily and a notch 7 is provided along the direction of the loop antenna 2. The notch 7 is provided on the opposite side with respect to the wrist band 3. The thickness of the support of the pipe 6 at the wrist side is made thick to support the loop antenna 2 apart from the surface of the wrist and the possibility of the antenna in contact with the wrist is precluded, the reception sensitivity of the loop antenna 2 is kept stably without the effect of the tail lock 5 or the pipe 6 even made of a metal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an antenna fixing structure for a wrist-worn radio.

[Conventional technology]

The technology related to the present invention has not been invented before.

[Problem to be solved by the invention]

When a loop antenna attached to a wrist-worn radio is worn parallel to the arm band of the receiver, the loop antenna may be deformed by external force and come into contact with the surface of the human lung. When a loop antenna comes into contact with an arm, the inductance of the antenna changes and the reception frequency deviates from the intended reception frequency.Furthermore, due to the effect of the human body, the Q of the resonant circuit including the antenna decreases significantly, resulting in a decrease in reception sensitivity.

Therefore, the present invention realizes an antenna fixing structure that allows stable reception without the loop antenna being deformed by external force and coming into contact with the arm surface.

[Means to solve the problem]

The antenna fixing structure of the present invention is a structure that supports a loop antenna that is attached to an arm-worn radio and that is separate from an arm band and has a shape that goes around the arm, in which the arm-worn radio is worn on the arm. The present invention is characterized in that a buckle portion that connects wrist bands for the purpose of the present invention is provided with a pipe that supports the loop antenna without coming into contact with the arm.

[Embodiment] FIG. 1 is a diagram in which the present invention is applied to an analog clock-type radio. In the figure, the loop antenna 2 is fixed only at the loop antenna fixed portion 1. loop antenna 2
is slightly longer than the wrist band 3, and by fixing the center point of the loop antenna 2, the loop antenna 2 is prevented from being deformed by external force and coming into contact with the arm. The external force in this case is the gravitational force of the arm that is applied to the loop antenna fixed portion l when the radio is used at the desk.

If a rigid material is used for the loop antenna 2, it is possible to prevent the loop antenna 2 from coming into contact with the arm even when external forces are applied from the side.

FIG. 2 is a detailed view of the loop antenna fixed portion l in FIG. 1. There is a vibro for fixing the loop antenna 2 on the side of the buckle 5. This vibro is made of a material such as plastic and has a cut 7 along the direction of the loop antenna 2 so that the loop antenna 2 can be easily attached and detached. The notch 7 is located on the opposite side of the wrist band 3 as shown in the figure. This makes it easier to attach the loop antenna 2 to the pipe, and by increasing the thickness of the support on the arm side of the vibro, the loop antenna 2 can be supported away from the arm surface, reducing the possibility of it coming into contact with the arm. can be made smaller.

FIG. 3 is a sectional view of the buckle fitting 5 and the human arm 11 when the loop antenna is attached by another means.

There is a cover 9 covering the loop antenna 2 and a protrusion 8 attached thereto. The cover 9 and the projection 8 are attached to the loop antenna 2 only in the area where the wrist band 30 and the buckle 5 are located.

By using an insulating material for the protrusion 8 and the cover 9, even if the buckle 5 and the vibro are made of metal, the loop antenna 2 can maintain stable reception sensitivity without being affected by them. Furthermore, since the protrusion 8 is further away from the arm surface, the effect on the human body shape can also be reduced.

〔Effect of the invention〕

As described above, according to the present invention, the pipe for fixing the loop antenna is provided in the buckle part that connects the arm bands for fixing the radio to the arm, so that the loop antenna can be attached to the arm. prevents contact with.

Therefore, changes in the inductance of the loop antenna due to the influence of the human arm can be suppressed, and furthermore, a decrease in the Q of the resonant circuit including the antenna can be suppressed, and reception sensitivity can be kept stable.

[Brief explanation of the drawing]

FIG. 1 is an external view of an analog watch type radio device to which the present invention is applied. FIG. 2 is a diagram showing an embodiment according to the present invention. FIG. 3 is a sectional view of a buckle and a human arm showing one embodiment of the present invention. l... Loop antenna fixing part 2... Loop antenna 3... Wrist band 4... Receiver body 5... Buckle 6... Pipe for fixing loop antenna 7... Notch for attaching loop antenna 8... Loop antenna fixing protrusion 9... Loop antenna fixing cover II... Human arm

Claims (1)

[Claims] In a structure that supports a loop antenna that is attached to an arm-worn radio and that is separate from the arm band and has a shape that goes around the arm, the arm bands for wearing the arm-worn radio on the arm are interconnected. An antenna fixing structure characterized in that a buckle portion of the antenna is provided with a pipe that supports the loop antenna without contacting the arm.