JPH0124967Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an antenna mounting structure, and is particularly suitable for removably mounting an ultra-slim antenna such as that installed on an ultra-small pocket radio. Regarding antenna mounting structure.

[Conventional technology]

In recent years, ultra-small pocket radios and headphone-type radios have been developed, and the antennas installed on these radios have also become ultra-slim. In this case, since the main body of the radio has been miniaturized and it is difficult to secure space for storing the antenna inside, there is a demand for the antenna to be detachable from the radio main body.

[Problem to be solved by the invention] By the way, conventionally known detachable antenna mounting structures, as seen in Publication of Utility Model Publication No. 55-34645, for example, attach the antenna body via a relatively large antenna mounting column. This is a type of antenna that can be attached to and removed from a mounting holder on the side of the receiver housing, and first of all, the structure becomes large, making it unsuitable for mounting the ultra-slim antenna described above. Not only that, but
In the conventional mounting structure described above, since the locking part provided on the antenna mounting column is attached to and detached from the mounting holder using the elastic deformation of the slotted groove, a certain amount of force is required to attach and detach the antenna. However, if this is used as an ultra-slim antenna mounting structure, there is a risk that excessive force will be applied to the antenna, causing it to bend or break inadvertently.

Therefore, the present invention provides an antenna mounting structure that is small in structure and suitable for ultra-slim antennas, can be mounted with high precision and reliably, and can be attached and detached with a weak push-in or pull-out force. With the goal.

[Means to solve the problem]

To achieve this purpose, the present invention includes a mounting pin fixed to the base end of the antenna body, and a mounting holder into which the mounting pin is inserted, and the mounting holder has a pointed end on the side toward which the mounting pin is pulled out. A ball movement space with a wedge-shaped cross section is formed around the mounting pin, and a clamping ball capable of clamping the mounting pin with a wedge effect is accommodated in this ball movement space, and the clamping ball is mounted. A ball retainer is provided which holds the pin movably along the axial direction, and the ball retainer is biased in the direction in which the mounting pin is pulled out and is configured to be externally operable against this biasing force. do.

[Effect]

With the above configuration, the antenna can be made smaller by the attachment pin, and the attachment holder can also be made smaller.
The mounting pin is fixed to the mounting holder by a wedge effect due to the biasing force of the clamping ball, and is prevented from being pulled out in the direction in which the antenna is pulled out. Further, the antenna can be easily attached and detached by external operation of the retainer.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

FIG. 1 schematically shows a mini radio set to which an antenna mounting structure according to an embodiment of the present invention is applied. In the figure, reference numeral 1 is a casing of the mini radio set, and a mounting bracket 2 formed at the upper part of the back surface of the mini radio set is shown in FIG. The mounting holder 3 is fixed with screws using a flange 3a to be described later, and an ultra-slim multi-stage rod antenna 4 serving as an antenna that can be attached to and detached from the mounting holder 3 extends upward from the top surface of the casing of the mini radio set. It can be expanded and contracted.

In FIG. 2 showing the attachment and detachment structure between the multi-stage rod antenna 4 and the attachment holder 3, reference numeral 5 designates a attachment pin which also serves as a base metal fitting, one end of which is inserted into the base end of the antenna 4 and fixed by caulking. 4. The pin portion 5a extending in the axial direction from the base end has a smaller diameter than the antenna 4, and
A pointed head 5b is formed at its tip.

On the other hand, the mounting holder 3 into which the base end of the antenna 4 and the mounting pin 5 are inserted has a mounting flange 3a.
The antenna fitting hole 3b has a diameter corresponding to the base end of the antenna 4 inside.
and a pin fitting hole 3c having a diameter corresponding to the pin portion 5a of the mounting pin 5 are formed concentrically.
The antenna 4 is prevented from falling down with respect to the mounting holder 3. Inside the mounting holder 3, where most of the pin portion 5a of the mounting pin 5 faces,
A tapered wall surface 3d is formed in which the pin fitting hole 3c side, that is, the side in the direction in which the mounting pin 5 is pulled out has a small diameter, and the opposite side in the direction in which the mounting pin 5 is inserted has a large diameter. A ball movement space 6 is formed which has a wedge-shaped cross section with the side in the direction in which the mounting pin 5 is pulled out being the pointed side.

The ball movement space 6 accommodates clamping balls 8 which are held by a ball retainer 7 at three equal intervals in the circumferential direction around the mounting pin 5. By press-contacting the tapered wall surface 3d and the pin portion 5a of the mounting pin 5, the mounting pin 5 can be clamped due to its wedge effect.

Here, a locking portion 3e whose diameter is narrowed down to a slightly smaller diameter is formed at the large-diameter open end of the tapered wall surface 3d of the mounting holder 3, and the seat plate is locked to this locking portion 3e. 9 and the ball retainer 7, the clamping ball 8 is biased via the ball retainer 7 in the direction in which the mounting pin 5 is pulled out. In order to move the ball retainer 7 that receives such a spring biasing force against the biasing force, an operating rod 7a is integrally formed with the ball retainer 7.
penetrates the seat plate 9 and extends to the outside from the large-diameter opening of the tapered wall surface 3d, to which an operating knob 11 is attached. In addition, in Figure 2, the code 1
2 is the pin portion 5a and the pointed head 5 of the mounting pin 5;
b is the escape hole into which it is inserted.

In the above configuration, the clamping pressure ball 8 is connected to the pressing spring 10.
Since the tapered wall surface 3d is always biased toward the small diameter side by the action of , the mounting pin 5 is held with high precision without wobbling due to the wedge effect. Since the base end portion of the antenna 4 and the pin portion 5a of the mounting pin 5 are held by the antenna fitting hole 3b and the fitting hole 3c of the mounting holder 3, the antenna 4 does not fall relative to the mounting holder 3 and has high precision. This ensures that it is firmly fixed. In such a fixed state, even if a force is applied to the antenna 4 in the pull-out direction, the direction matches the direction of the biasing force of the push spring 10, resulting in an increase in the clamping force due to the wedge effect of the clamping ball 8. Therefore, the antenna 4 will not be pulled out carelessly. Furthermore, if the diameter of the pin portion 5a of the mounting pin 5 is constant, the clamping force by the clamping ball 8 will not change, so the antenna 4 will be securely fixed even if the insertion amount of the mounting pin 5 varies slightly. can do.

When removing antenna 4 from mounting holder 3,
Using the knob 11, move the ball retainer 7 against the biasing force of the spring 10, and press the ball 8.
Release the clamping force of the mounting pin 5 in advance. By doing so, the antenna 4 can be removed by lightly pulling it out, and no unreasonable force is applied to the antenna 4. Therefore,
Even if the antenna 4 has an ultra-slim form, accidents such as inadvertent bending or breakage of the antenna 4 can be prevented.

When attaching the antenna 4, the above-described removal procedure may be reversed, but the operation of moving the ball retainer 7 using the knob 11 may be omitted. That is, the mounting pin 5 is attached to the mounting holder 3.
By inserting the pin portion 5a into the relief hole of the ball retainer 7, a force of movement toward the larger diameter side of the tapered wall surface 3d acts on the clamping ball 8, so that the pin portion 5a is inserted into the escape hole of the ball retainer 7. is the same as when the clamping force due to the wedge effect of the clamping ball 8 is released,
The antenna 4 can be attached with an extremely weak pushing force that only slightly pushes the push spring 10.

In addition, in this embodiment, in addition to the mounting pin 5, the clamping ball 8 and the mounting holder 3 are made of conductive metal, and the connection hole 13 provided in the mounting flange 3a of the mounting holder 3 shown in FIG. By connecting the lead wire on the mini radio set side to the antenna 4.
It is designed to provide continuity.

Furthermore, as a means for attaching the flange 3a of the mounting holder 3 to the mounting bracket 2 of the mini radio set housing 1, in this embodiment screw means is used, but the elastic force is increased by the slotted groove 14a as shown in FIG. The fixing rivet 14 having the provided locking portion 14b at the tip may be used for attachment, and in such a case, attachment and detachment of the attachment holder 3 to and from the housing 1 can be easily done with one touch without using a tool such as a screwdriver. can be done.

Further, the means for making the ball retainer 7 externally operable is not limited to the operation rod 7a and the knob 11 as in this embodiment, but for example, as shown in FIG.
A slit window 3f along the moving direction of the ball retainer 7 is formed in the cylindrical portion corresponding to d, and an operation rod 7b passing through the slit window 3f is fixedly provided on the ball retainer 7. An appropriate operating knob 11 is provided at the tip of the operating rod 7b.
A etc. may be attached.

[Effect of idea]

As explained above, according to the present invention, the member fixed to the base end of the antenna body may be a mounting pin;
This mounting pin does not require the processing of locking parts or grooves as in conventional structures, and can easily be made smaller in diameter, and the mounting holder can also be made smaller accordingly. , it is possible to achieve a structure that is smaller and lighter, and a structure that is suitable as an ultra-slim antenna mounting structure can be obtained.

In addition, the mounting pin is fixed to the mounting holder by the wedge effect of the clamping ball that receives the biasing force.
Even if there is some manufacturing error in the mounting pin or mounting holder, or even if there is some variation in the amount of insertion of the mounting pin, the antenna can be mounted with high precision, and the biasing force mentioned above is in the direction in which the mounting pin is pulled out. This prevents the antenna from being pulled out and allows the antenna to be reliably attached.

Further, since the clamping ball is movable in the axial direction of the mounting pin by an externally operable retainer against the biasing force, by operating the retainer to release the clamping force of the clamping ball, the antenna The antenna can be attached and detached using a gentle pushing and pulling force without applying excessive force to the main body, preventing accidents such as breaking or bending the antenna even with an ultra-slim antenna. It can be prevented.

[Brief explanation of drawings]

Fig. 1 is a schematic overall perspective view of a mini radio set to which an antenna mounting structure according to an embodiment of the present invention is applied, Fig. 2 is a half sectional view of the main part of the antenna mounting structure, and Fig. 3 is a plan view of the mounting holder. 4 is a front view of a fixing rivet according to another embodiment, and FIG. 5 is a half sectional view of another embodiment of the present invention. 1... Housing, 2... Mounting bracket, 3... Mounting holder, 3a... Flange, 3b... Antenna fitting hole, 3c... Pin fitting hole, 3d... Tapered wall surface, 3e... Locking part, 3f...slit window, 4...
...Antenna, 5...Mounting pin, 5a...Pin part, 5b...Pointed head, 6...Ball movement space, 7
... Ball retainer, 7a, 7b ... Operation rod, 8
...Press ball, 9...Seat plate, 10...Press spring, 11, 11a...Knob, 12...Escape hole,
13... Connection hole, 14... Fixed rivet.

Claims (1)

[Scope of claim for utility model registration] A mounting pin fixed to the base end of the antenna body,
a mounting holder into which the mounting pin is inserted; the mounting holder has a ball movement space formed around the mounting pin with a wedge-shaped cross section in which the side in the direction in which the mounting pin is pulled out is the pointed side; A clamping ball capable of clamping the mounting pin with a wedge effect is housed in the moving space, and a ball retainer is provided to hold the clamping ball movably along the axial direction of the mounting pin. An antenna mounting structure characterized in that the antenna is biased in a direction in which the pin is pulled out and is configured to be externally operable against this biasing force.