JPH0923114A - Mechanism for detaching antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to detach an antenna element only when its detachment is required. SOLUTION: A plunger 5 united with a lock slider 4 is inserted into an insertion hole formed on the center part of a holder 7 united with a solenoid 8 through a coil spring 6. When the holder 7 is inserted into a hot fitting 3 molded so as to be inserted into an antenna case from the lower part of the fitting 3 in the state, a holder lug part 7-1 is engaged with a square hole 3-3 penetrated into the fitting 3 and the fitting 3 is united with the holder 7. When an antenna element is screwed into the upper end of the fitting 3, an L-shaped notch formed on the base end part of the antenna element is locked with a stopper part 4-3 formed on the upper face of the slider 4, so that the element can not be detached. When the solenoid 8 is driven, the stopper part 4-3 is moved down and the element can be detached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle antenna in which an antenna element can be removably attached to an antenna case fixed to a vehicle body or the like, and more particularly to a mechanism for removing the antenna element only when desired. .

[0002]

2. Description of the Related Art An antenna of this type is mounted, for example, on a rear portion of a roof of a car body, and the antenna is composed of an antenna case mounted on the roof of the car body and an antenna element detachably mounted on the antenna case. To be done. Further, the antenna case is fixed to the roof of the vehicle body by screwing means, and by screwing the male screw portion formed on the base end portion of the antenna element into the female screw portion formed on the upper end of the antenna case, It is detachably attached. Therefore, for example, a rotating brush of a car wash machine may collide with the vehicle when it is washed, or it may come into contact with the garage entrance when entering the garage.
The antenna element can be removed from the antenna case beforehand so that the antenna element is not damaged.

[0003]

However, if the antenna element is made detachable by screwing as described above,
It is necessary to remove the antenna element from the antenna case during parking, because it may be stolen during parking. However, there is a problem that the user forgets to remove the antenna element during parking, or because the removal is troublesome, the user may park the vehicle with the antenna element attached.

Therefore, an object of the present invention is to provide an antenna removing mechanism which cannot always remove the antenna element from the antenna case even though the antenna element can be easily removed from the antenna case when it is desired to remove the antenna element.

[0005]

In order to achieve the above object, in an antenna removing mechanism of the present invention, an antenna in which an antenna element is detachably attached to an antenna case having an amplifier or the like built therein is provided. A screw portion having an L-shaped cutout portion is formed at the base end portion, and the threaded portion of the base end portion of the antenna element fixed to the upper end of the antenna case is electrically conductive. Hot metal fitting, a lock slider slidably fitted to the hot metal fitting, a plunger fixed to the lower surface of the lock slider, and the lock slider fitted slidably and non-rotatably. A holder to be fitted, a solenoid fixed to the holder for attracting the plunger, and inserted into the plunger, A coil spring for urging the slider to be pushed out of the holder is provided, and a stopper portion for engaging with the L-shaped notch portion for restricting rotation of the antenna element in a detaching direction is provided on an upper surface of the lock slider. When the solenoid is driven, the plunger is sucked and the engagement between the stopper portion and the L-shaped cutout portion is released.

In the antenna removing mechanism, the holder locking claw formed on the holder is engaged with the solenoid locking hole formed on the side surface of the solenoid, whereby the holder and the solenoid are separated from each other. The holder and the hot metal fitting are fixed so as to be integrated by engaging the holder claw portion formed on the holder with the square hole formed on the hot metal fitting. It was made to be done.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an external perspective view of an antenna having an antenna removing mechanism of the present invention. The antenna shown in FIG. 1 includes a synthetic resin antenna case 1 and an antenna element 2 detachably attached to the antenna case 1. The antenna element 2 is composed of an antenna base 2-4 and a rod portion 2-6. At the bottom of this antenna case 1,
Screwing means for fixing the antenna to the roof of the vehicle or the like is provided.

FIG. 2 is an exploded perspective view of the antenna shown in FIG. 1. FIG. 2 shows an example of the structure of the antenna removing mechanism of the present invention. In this figure, a screw portion having an L-shaped cutout is formed at the base end portion of the antenna element 2 as described later, and this screw portion is insert-molded on the upper end of the antenna case 1 to be a hot metal fitting 3 The antenna element 2 is fixed to the antenna case 1 by being screwed into the threaded portion 3-6 formed inside the upper part of the antenna element 2. Further, a holder 7 is fixed to the solenoid 8, and the plunger 5 is inserted into an insertion hole formed in the holder 7 and the solenoid 8.
However, it is inserted against the biasing force of the coil spring 6.
Then, when the solenoid 8 is driven, the plunger 5 is attracted into the solenoid 8.

The upper end of the plunger 5 is press-fitted and fixed to the lower surface of the lock slider 4, and is formed on the side surface of the lock slider 4 when the plunger 5 is inserted into the holder 7 and the solenoid 8. The rotation restriction piece and the like that are engaged are engaged with the engagement portion and the like that is formed inside the upper tubular body of the holder 7. As a result, the lock slider 4 cannot rotate with respect to the holder 7. However, it is slidable in the extending direction of the plunger 5. A holder claw portion, which will be described later, is formed on the upper portion of the holder 7. By engaging this holder claw portion with the square hole 3-3 formed on the side surface of the hot metal fitting 3, the lock slider 4 is moved to the hot metal fitting 3 It will be slidably housed inside.

In this case, the lock slider 4 is biased by the coil spring 6 so that the upper end of the lock slider 4 comes into contact with the hot metal fitting 3. A stopper portion to be described later is formed on the upper surface of the lock slider 4, and when the antenna element 2 is screwed into the hot metal fitting 3, the stopper portion has an L-shaped shape formed at the base end portion of the antenna element 2. A threaded portion having a notch is engaged. As a result, the antenna element 2 can be rotated in the screwing direction, but the rotation is restricted in the direction to remove it from the hot metal fitting 3.

The antenna removing mechanism of the present invention is shown in FIG.
3 is a mechanism housed in the antenna case 1 shown in FIG. 3, and a detailed assembly perspective view showing an example of this mechanism is shown in FIG.
4 shows a cross-sectional view after the assembly. In these figures, when the holder 7 is put on the frame of the solenoid 8 around which the coil is wound, the frame of the solenoid 8 is held under the holder 7. At this time, a hole for locking is formed in the frame of the solenoid 8 as shown in FIG. 4, and the claw portion formed at the lower end of the holder 7 is formed in this hole.
It is locked as shown in. As a result, the solenoid 8 and the holder 7 are integrated.

Further, as shown in FIG. 3, a pair of cylindrical holder wall portions 7-2 and a pair of holder claw portions 7-1 are formed between the holder wall portions 7-2 on the upper portion of the holder 7. Has been done. Further, a concave holder engaging portion 7-4 is formed inside the holder wall portion 7-2, and a convex holder step portion 7-3 is formed outside thereof. An insertion hole that penetrates the solenoid 8 is formed in the center of the holder 7. The rod-shaped plunger 5 is inserted through this insertion hole, and when the solenoid 8 is driven, the plunger 5 is attracted to the solenoid 8.

The upper end of the plunger 5 is pressed into a cylindrical plunger press-fitting portion formed on the lower surface of the lock slider 4, so that the lock slider 4 and the plunger are integrated. A coil spring 6 is attached to a ring-shaped coil spring holding portion formed on the lower surface of the lock slider 4. As a result, when the plunger 5 is fitted into the holder 7 and the insertion hole of the solenoid 8, the lock slider 4 is urged in the direction of being pushed out of the holder 7. Further, an O-ring holding portion is formed on the upper end portion of the lock slider 4, and a waterproof O-ring 9 is attached to this holding portion.

A lock slider 4 having an O-ring 9 mounted on a holder 7 integrated with a solenoid 8 is provided.
With the plunger 5 integrated with the above is inserted, it is inserted into the hot metal fitting 3 from below the hot metal fitting 3. (However, FIG. 3 shows only one half of the hot metal fitting 3 which is a half of the hot metal fitting 3.) Then, the holder 7
The pair of holder claws 7-1 formed on the upper part of the
A pair of square holes 3-3 formed on the side surfaces of the hot metal fitting 3
To engage. This is shown in FIG. In this case, as described above, the coil slider 6 biases the lock slider 4 so that the upper end of the lock slider 4 contacts the hot metal fitting 3. Further, a tapered stopper portion 4-3, which gradually increases in height, is formed on the upper surface of the lock slider 4. Further, the outer circumference of the O-ring 9 comes into pressure contact with the inner circumference of the hot metal fitting 3, thereby preventing water or the like from entering the inside of the antenna case 1.

In this stopper portion 4-3, when the screw portion formed at the base end portion of the antenna element 2 is screwed into the screw portion 3-6 formed on the upper inner surface of the hot metal fitting 3, the screw is formed. The lower end of the L-shaped notch formed in the portion slides on the upper surface of the inclined portion of the stopper portion 4-3. As a result, when screwed in, the lock slider 4
Is slightly pushed down against the coil spring 6 with the rotation of the screw portion and can be screwed in by overcoming the stopper portion 4-3 having the inclined portion, but when rotated in the removing direction, the L-shaped notch portion is formed. Is the stopper 4-
It collides with the stepped portion 3 and its rotation is restricted. As a result, when the antenna removal mechanism is in the normal state,
The antenna element 2 can be attached to the antenna case 1 in which the hot metal fitting 3 is insert-molded, but the antenna element 2 cannot be removed.

The solenoid 8 is energized to drive the solenoid 8 when the vehicle is washed or when the antenna is obstructed, such as when the vehicle is parked. Then, the solenoid 8 attracts the inserted plunger 5 against the biasing force of the coil spring 6. As a result, the lock slider 4 integrated with the plunger 5 is pushed down, and the stopper portion 4-3 is disengaged from the L-shaped notch formed in the base end of the antenna element. The antenna element 2 is rotatable in the removing direction. That is, the antenna element 2 can be removed from the antenna case 1.

A protruding lock slider protrusion formed on the side surface of the lock slider 4 is slidably fitted in a holder engaging portion 7-4 formed on the holder 7, and the holder claw portion 7 is also provided. The rotation restricting piece formed on the side surface of the lock slider 4 is fitted so as to surround -1 so that the lock slider 4 cannot rotate with respect to the holder 7. Further, a holder step portion 7-3 formed outside the holder wall portion 7-2 of the holder 7 has a hot metal fitting notch portion 3-5 formed at the lower end of the hot metal fitting 3.
The holder 7 is prevented from rotating with respect to the hot metal fitting 3 by being fitted into. As a result, the lock slider 4 cannot rotate with respect to the hot metal fitting 3, and when the antenna element 2 is screwed onto the hot metal fitting 3 and engages with the stopper portion 4-3, the rotation of the lock slider 4 is restricted. Therefore, the antenna element 2 cannot be removed carelessly.

Next, detailed configurations of respective parts of the antenna removing mechanism of the present invention are shown in FIGS. FIG. 5 (a)
The detailed configuration of the antenna element 2 is shown in FIG. In this figure, an antenna element 2 includes a rod portion 2-6 formed by winding a conductor in a coil shape on an insulator, and an antenna base molded by a flexible synthetic resin such as rubber. 2-4. The antenna top 2-
7 are provided. Further, in the antenna base 2-4, the rod portion 2-6 is connected to the coil spring 2-3. The coil spring 2-3 is fixed to the threaded portion 2-1 at the base end. This screw part 2-1
As shown in FIG. 2B in an enlarged manner, an L-shaped notch 2-2 is formed in the screw portion 2-1. As described above, the L-shaped cutout portion 2-2 is a portion that engages with the stopper portion 4-3 of the lock slider 4.

The flexible antenna base 2-4 incorporating the coil spring 2-3 absorbs the applied external force by bending the antenna base 2-4 when an external force is applied to the antenna element 2. The antenna element 2 is prevented from being broken.

Next, the detailed structure of the hot metal fitting 3 is shown in FIG. (A) of this figure is a front view of the hot metal fitting 3, and a mounting screw portion 3-1 is formed on the upper portion thereof, and the outer peripheral surface thereof is knurled. Further, a pair of square holes 3-3 and a ring-shaped protrusion 3-4 are formed so as to face the enlarged diameter portion 3-2 continuing to the upper part. Further, knurling is also applied to the outer circumference of the expanded diameter portion 3-2, and these knurling is used as a retainer and a rotation stopper when the hot metal fitting 3 is insert-molded in the antenna case 1.

Further, as shown in the sectional view of FIG. 1B, a screw portion 2-1 formed at the base end portion of the antenna element 2 is screwed into the inner surface of the mounting screw portion 3-1. Dressing 3-
6 is formed, and a pair of square holes 3-3 with which the holder claws 7-1 are engaged are formed in the expanded diameter portion 3-2 below. Further, a pair of hot metal fitting cutouts 3-5 are formed at the lower end of the expanded diameter portion 3-2. The hot metal fitting cutouts 3-5 are assembled into a holder step portion 7- of the holder 7. 3 is a cutout portion to be fitted. Note that FIG. 7C is a top view, and FIG. 7D is a bottom view.

Next, the detailed structure of the lock slider 4 and the plunger 5 is shown in FIG. 7, (a) is a top view of the lock slider 4, (b) is a front sectional view of the lock slider 4, (c) is a bottom view of the lock slider 4, and (d) is a stopper portion 4 of the lock slider 4. -3
FIG. As shown in these drawings, an O-ring holding portion 4-1 to which a waterproof O-ring 9 is attached is formed on the upper outer peripheral portion of the lock slider 4, and a cylindrical lock slider ring is provided on the upper surface. A stopper portion 4-3 whose height gradually increases in the clockwise direction is formed inside the portion 4-2. A development view of the stopper portion 4-3 is shown in FIG.

When the antenna element 2 is attached, the screw portion 2-1 at the base end of the antenna element 2 is attached to the stopper portion 4
-3 is slid in the clockwise direction and screwed. In addition, if the antenna element 2 is rotated counterclockwise to remove it, the screw part 2
The L-shaped notch portion 2-2 of -1 is abutted at the step portion where the inclined portion of the stopper portion 4-3 is finished, and thus it cannot be rotated any more. In this case, as described above, the lock slider 4 is prevented from rotating with respect to the hot metal fitting 3. Further, a cylindrical plunger press-fitting portion 4-5 is formed in the lower central portion of the lock slider 4, and a groove-shaped coil spring holding portion 4-4 for holding the coil spring 6 is formed outside thereof. ing.

On the outer cylindrical portion of the lower portion of the coil spring holding portion 4-4, there are formed a number of protrusions directed outward. One of them is a pair of lock slider protrusions 4-6 formed so as to face each other, and the protrusions 4-6, when assembled, are the holder engagement portions 7 formed on the holder 7. -4 is inserted. Further, a pair of rotation restricting pieces 4-7 are also formed,
This rotation restricting piece 4-7 holds the holder 7 when assembled.
The holder claws 7-to surround the holder claws 7-1 of
1 is fitted in the rotation restricting piece 4-7. As a result, the lock slider 4 is restricted from rotating with respect to the holder 7. However, it is slidable in the axial direction.

A front view of the plunger 5 is shown in FIG.
As shown in the top view of FIG. 6 (e), the plunger 5 is a rod-shaped body, and the press-fitting piece 5-1 is formed by forming a slit on the small-diameter portion at the upper end thereof. Piece 5-1
Is press-fitted into the plunger press-fitting portion 4-5 formed in the lock slider 4, so that the plunger 5 and the lock slider 4 are integrated.

Next, FIG. 8 shows the detailed structure of the holder 7, where (a) is a top view, (b) is a cross-sectional view of one side surface, (c) is a bottom view, and (d). ) Is a cross-sectional view of the other side surface. A pair of holder wall portions 7-2 and a pair of opposing holder claw portions 7-1 are formed on the upper portion of the holder 7 so as to face each other as if the tubular portion was cut. The holder claw portion 7-1 engages with the square hole 3-3 formed on the side surface of the hot metal fitting 3 when assembled to integrate the hot metal fitting 3 and the holder metal fitting 7. Further, holder engaging portions 7-4 are formed inside the holder wall portions 7-2, respectively, and the lock slider protrusions 4 formed on the lock slider 4 at the holder engaging portions 7-4 during assembly. -6 is inserted.

Further, a holder step portion 7-3 is formed on the outside of the holder wall portion 7-2, and the holder step portion 7-3 is formed on the hot metal fitting 3 during assembly. 5 is inserted. The lower part of the holder 7 has a rectangular holder holding portion 7-6 for holding the solenoid 8.
Is formed, and the solenoid 8 is provided in the holding portion 7-6.
The holder 7 and the solenoid 8 are integrated by inserting. In this case, the holder holding part 7-6
A pair of claws are formed at the lower end of the
The claw portion comes into engagement with the engagement hole formed on the side surface of the solenoid 8. An insertion hole 7-5 is formed in the center of the holder 7 for inserting the plunger 5 that penetrates the solenoid 8 during assembly.

The respective parts constituting the antenna removing mechanism of the present invention are constructed as described above. Next, the assembly method thereof will be described. The hot metal fitting 3 is insert-molded in advance in the antenna case 1. And the solenoid 8
Is inserted in the holder 7 to integrate the solenoid 8 and the holder 7, and the plunger 5 is press-fitted into the lock slider 4 to press the plunger 5 and the lock slider 4 together.
And are integrated. Next, the integrated plunger 5
Insert the coil spring 6 into the lock slider 4 and attach it. In this state, the plunger 5 is inserted into the insertion hole 7-5 of the holder 7 integrated with the solenoid 8.

Next, when the upper part of the holder 7 is inserted into the hot metal fitting 3 in this state, the holder claws 7-1 formed on the holder 7 are square holes 3 formed on the hot metal fitting 3.
-3 to be assembled as shown in FIG. In this case, the upper end of the lock slider 4 is urged by the coil spring 6 so as to come into contact with the inner surface of the hot metal fitting 3, so that the base end portion of the antenna element 2 is screwed into the threaded portion 3-6 of the hot metal fitting 3. At that time, the L-shaped cutout portion 2-2 abuts on the stopper portion 4-3, so that the antenna element 2 can be rotated only in the clockwise direction.

Although the antenna removing mechanism of the present invention is provided at the inner part of the antenna case 1 where the workability is poor, the components are fixed to each other by engaging the claws with each other as described above. Since the operation is performed by the square hole or the like, the antenna removing mechanism of the present invention can be assembled only by pushing the fixed component into the fixed component. For this reason, mistakes in assembling such as misalignment of screw tightening positions and insufficient screw tightening will not occur. Further, since the switch for controlling the drive of the solenoid 8 is provided inside the vehicle compartment and the drive of the solenoid 8 can be controlled only from within the vehicle compartment, the antenna element 2 can be removed from the antenna case 1 only when it is desired to remove. Therefore, it is possible to prevent theft. Further, this control switch may be used in combination with a radio switch or a switch for a vehicle interior light.

Further, even if water or the like enters from the upper end of the hot metal fitting 3 with the antenna element 2 removed, the O-ring 9 does not enter the antenna case 1 and the antenna element 2 is provided in the antenna case 1. It is possible to protect existing amplifier boards, duplexers, and the like. Instead of the solenoid 8, a drive wire for moving the plunger 5 may be provided and the antenna element 2 may be removed by operating the drive wire. In this case, it is preferable that the drive wire is inserted into the guide tube so that the end portion of the drive wire is arranged at the driver's seat inside the automobile.

[0032]

Since the present invention is constructed as described above, in the normal state, the antenna element rotates in the mounting direction, but cannot rotate in the removal direction, and only when it is desired to remove it by the control in the passenger compartment. The antenna element can be removable. Therefore, it is possible to prevent the antenna element from being stolen. Further, since the assembly of the antenna removing mechanism for that purpose is of a push type, the assembly can be easily performed. Furthermore, since it is a waterproof mechanism, even if water or the like enters from the upper end of the antenna case, it does not enter the inside.

[Brief description of drawings]

FIG. 1 is a perspective view showing an external appearance of an antenna provided with an antenna removing mechanism of the present invention.

FIG. 2 is an assembly exploded perspective view of an antenna provided with an example of an antenna removing mechanism of the present invention.

FIG. 3 is an assembly exploded perspective view of an example of an antenna removing mechanism of the present invention.

FIG. 4 is a cross-sectional view of an example of an antenna removing mechanism of the present invention provided in an antenna case.

FIG. 5 is a diagram showing a configuration of an antenna element.

FIG. 6 is a view showing a detailed configuration of a hot metal fitting of the antenna removing mechanism of the present invention.

FIG. 7 is a diagram showing a detailed configuration of a lock slider of the antenna removing mechanism of the present invention.

FIG. 8 is a diagram showing a detailed configuration of a holder of an antenna removing mechanism of the present invention.

[Explanation of symbols]

 1 Antenna case 2 Antenna element 2-1 Screw part 2-2 L-shaped notch part 2-3 Coil spring 2-4 Antenna base 2-6 Rod part 2-7 Antenna top 3 Hot metal fitting 3-1 Mounting screw part 3- 2 Expanded part 3-3 Square hole 3-4 Ring-shaped projection 3-5 Hot metal notch 3-6 Screw-on part 4 Lock slider 4-1 O-ring holding part 4-2 Lock slider ring part 4-3 Stopper part 4-4 Coil spring holding part 4-5 Plunger press-fitting part 4-6 Lock slider protrusion 4-7 Rotation restriction piece 5 Plunger 5-1 Press-fitting piece 6 Coil spring 7 Holder 7-1 Holder claw part 7- 2 Holder wall portion 7-3 Holder step portion 7-4 Holder engaging portion 7-5 Insertion hole 7-6 Holder holding portion 7-7 Holder concave portion

Claims (2)

[Claims] 1. An antenna in which an antenna element is detachably attached to an antenna case containing an amplifier or the like, wherein a screw portion having an L-shaped cutout portion is formed at a base end portion of the antenna element. And a conductive hot metal fitting fixed to the upper end of the antenna case, to which the screw portion of the base end portion of the antenna element is screwed, and a lock slider slidably fitted to the hot metal fitting. A plunger fixed to the lower surface of the lock slider, a holder into which the lock slider is slidably and non-rotatably fitted, and a solenoid fixed to the holder for attracting the plunger And a coil spring that is inserted into the plunger and urges the lock slider to be pushed out of the holder. A stopper portion is provided on the upper surface of the lock slider, with which the L-shaped notch portion that restricts rotation in the detaching direction of the antenna element is engaged, and when the solenoid is driven, the stopper portion is provided. An antenna removing mechanism, wherein the plunger is sucked and the engagement between the stopper portion and the L-shaped cutout portion is released. 2. A holder locking claw formed on the holder is engaged with a solenoid locking hole formed on a side surface of the solenoid, so that the holder and the solenoid are fixed together. The holder claw portion formed on the holder is engaged with a square hole formed on the hot metal fitting so that the holder and the hot metal fitting are integrally fixed. The antenna removing mechanism according to claim 1.