JPH04296105A - Antenna system for automobile - Google Patents

Abstract

PURPOSE:To realize the antenna system for an automobile easily replaced at a left or right side of the car body while a fixed structure withstanding vertical vibration of the car body. CONSTITUTION:A couple of rails 4j provided to both side walls opposite to the left and right sides of a skirt 4i symmetrically horizontally along a forward/ backward direction of the mount of the lower end of an antenna main body 4 is slid and fitted with respect to a groove 5a provided along the forward/ backward direction of a car body at both side of the antenna base 5 and a sufficient fixed state is obtained to every of forward/backward/left/right/upper/ lower directions by fitting a projection antenna main 5c in the said groove 5a to a rail notch 4k and the sliding of the a body 4 with respect to the antenna base 5 is made free by embedding the said projection 5c in the inside of the antenna base 5 through the depression of a button 5d and the antenna main body 4 is easily removed from any of forward/ backward directions.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle antenna device used for receiving television radio waves in a vehicle.

0002

BACKGROUND OF THE INVENTION Conventional antenna devices for automobiles that are attached to the outside of the vehicle body are often attached to the roof side, and in this case, the antenna device is designed to have strength in consideration of vibrations and wind pressure when the vehicle is running. Furthermore, in consideration of the case where the antenna is washed in an automatic car wash or the like, the antenna main body can be removed from the antenna base by some method. Examples of such conventional automobile antenna devices include those disclosed in, for example, Japanese Utility Model Publication No. 40-5135 and Japanese Patent Publication No. 1-48685.

[0003] The former, an automotive antenna device disclosed in Japanese Utility Model Publication No. 40-5135, slides a mounting base on which the antenna is attached to a T-groove that is open at one end, and uses a spring to move a pin-shaped contact piece in the vertical direction. In addition to making electrical contact by press-fitting the antenna base, it also serves as a stopper to prevent the mounting base from slipping out from the antenna base, and is also locked and fixed. However, this first automotive antenna device has the following drawbacks.

(1) A contact piece for making electrical contact,
Since the contact piece is pressed from above and below by a spring, the contact piece may also vibrate due to the vertical vibration of the vehicle body, which may lead to poor contact. In other words, the vibration of the vehicle body is greatest in the vertical direction.

(2) Since the pin-shaped contact piece to which vertical spring pressure is applied serves as a stopper between the mounting base and the antenna base, the contact piece also vibrates due to the vertical vibration of the vehicle body. , the stopper action may become incomplete. (3) It is troublesome to lock and unlock the antenna mounting base and the antenna base, and the key may be lost.

On the other hand, the latter, an antenna device for an automobile disclosed in Japanese Patent Publication No. 1-48685, has an antenna element that protrudes outward asymmetrically with respect to the front-rear direction of the vehicle body, and the antenna body is inserted into the groove of the antenna base. In this case, the antenna body portion and the antenna base portion are fixed by a knob elastically biased by a spring extending in the vertical direction. However, this second automotive antenna device has the following drawbacks.

(1) The hook part of the knob, which is provided on the antenna body and urged downward by a spring, is structured to engage with a hole provided on the top surface of the antenna base. The spring tends to fatigue due to vertical vibrations, and the antenna body may not be properly fixed.

(2) Since the externally protruding antenna element and the case body are asymmetrical with respect to the longitudinal direction of the vehicle body, the mounting position is limited to the right or left side of the vehicle body, and even when mounted on the opposite side, it remains the same. It cannot be replaced and requires replacement work that includes attaching and removing bolts, etc.

[0009]

[Problems to be Solved by the Invention] In other words, the above-mentioned conventional automobile antenna device has the disadvantage that it is susceptible to vibration in the vertical direction, that the antenna is not fixed properly or that the electrical contact is incomplete, and that it is difficult to install it in the longitudinal direction of the vehicle body. However, there are some troublesome drawbacks.

[0010] The present invention was made in view of the above problems, and
An object of the present invention is to provide an antenna device for an automobile that has a fixing structure that is strong against vertical vibrations of the vehicle body and that can be easily replaced between the left and right sides of the vehicle body.

[0011]

[Means for Solving the Problems] That is, an antenna device for an automobile according to the present invention includes an antenna body portion including a rod antenna for receiving television radio waves and a printed circuit board antenna element, and a lower end of the antenna body portion. A skirt portion provided along the front and back direction of the installation,
A pair of rails provided horizontally symmetrically with respect to the opposite left and right side walls of this skirt portion, a notch portion formed at the same opposing position in the pair of rails, and an antenna that is attached to the vehicle body via a mounting bracket. a base portion, grooves formed on the left and right side surfaces of the antenna base portion along the front and rear direction of installation, into which a pair of rails provided on the skirt portion of the antenna body portion fit and slide; a convex portion provided in the middle of the groove, which is always biased in the horizontal direction of the base by a spring force from inside the antenna base portion, and which is fitted into the rail notch of the antenna body; a button that is integrally connected with the convex part and embeds the convex part inside the antenna base part against the biasing force; One contact terminal from which a television reception signal received via the substrate antenna element is derived, and the rail notch provided on the upper surface side of the antenna base portion and into which the antenna main body portion is slidably fitted. and the other contact terminal which is crimped onto the one contact terminal in a state in which the convex portion is fitted and inputs the television reception signal derived thereto.

0012

[Operation] In other words, the grooves provided along the longitudinal direction of the vehicle body on both sides of the antenna base are horizontal to the left and right opposing walls of the skirt section provided along the longitudinal direction of the lower end of the antenna main body. By slidingly fitting a pair of symmetrically provided rails and fitting the protrusion in the groove into the rail notch, a sufficient fixation can be achieved in all directions: front and back, left and right, and up and down. Now you can get
Furthermore, by burying the convex portion inside the antenna base by pressing a button, the antenna body can slide freely with respect to the antenna base, making it easy to attach and detach from either the front or back of the antenna body. You will be able to figure it out.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which an automobile antenna device is attached to a vehicle body.

In FIG. 1, 1 is a vehicle trunk, 2 is an antenna, and 3 is a mounting bracket.The antenna 2 is attached to the left and right sides of the vehicle trunk 1 via mounting brackets 3, respectively, and when the vehicle is running, the antenna 2 is attached to the left and right sides of the vehicle trunk 1, respectively. Diversity receiver (
(not shown). FIG. 2 is a side view showing the external configuration of the automotive antenna device. FIG. 3 is a front view showing the external configuration of the automotive antenna device.

In FIGS. 2 and 3, 4 is an antenna body, 5 is an antenna base, 6 is a mounting bracket, and 7 is an antenna cable. The antenna body 4 is connected to a rod antenna 4a and molded cases 4b and 4c. The molded cases 4b and 4c are provided with contact terminals 4g for transmitting electrical signals to printed circuit board antenna elements 4e and 4f and the antenna base portion 5, which will be described later.

Reference numeral 4d is a screw for connecting and fixing the molded cases 4b and 4c, and when this screw 4d is loosened, the fixing angle between the molded cases 4b and 4c can be set to be variable. FIG. 4 is a diagram showing the internal structure of the antenna main body 4 in the above-mentioned automotive antenna device.
) is a side sectional view thereof, and FIG. 2(B) is a bottom view thereof.

In FIG. 4, 4e is a molded case 4b.
4f is a printed circuit board antenna element housed in a molded case 4c.

That is, the television reception signal received from the rod antenna 4a via the printed circuit board antenna elements 4e, 4f is supplied to the lead wire 4h and connected to the contact terminal 4.
g. This contact terminal 4g is implanted in the mold case 4c.

Reference numeral 4i denotes a skirt portion provided at the lower end of the molded case 4c corresponding to the mounting horizontal line, and on the opposite side surface inside this skirt portion 4i, a rail 4j and its notch corresponding to the above-mentioned mounting horizontal line are provided. part 4k
will be provided.

Here, the inner skirt rail 4j corresponding to the open end of the skirt portion 4i, that is, in the longitudinal direction of the vehicle body
A sloped portion 4l having a rounded corner is formed at each end.

FIG. 5 is a diagram showing the structure of the antenna base part 5 in the above-mentioned automobile antenna device. FIG. 5(A) is a perspective view thereof, FIG.
C) is a partially extracted perspective view. In Figure 5, 5
A is a groove, which is provided on both sides of the antenna base portion 5 in the longitudinal direction thereof, that is, in correspondence with the mounting horizontal line along the longitudinal direction of the vehicle body. 5b is a wall left at the end of the groove 5a. Reference numeral 5c is a convex portion projecting in the middle of the groove 5a, and is integrally connected to buttons 5d projecting from both sides of the antenna base portion 5.

Reference numeral 5e denotes a spring interposed between the pair of buttons 5d in the internal space of the antenna base portion 5, and the spring force of this spring 5e causes the button 5d and its integral convex portion 5c to Both sides of the base portion 5 are elastically biased outward. That is, when the button 5d is pressed, the spring 5e contracts, causing the convex portion 5 to protrude into the groove 5a.
c is buried inside the antenna base part 5. 5f is a stopper connected to the button 5d, and this stopper 5d
is pressed against the inner wall of the antenna base portion 5 by the elastic biasing force of the spring 5e.

Reference numeral 5g is a contact terminal for inputting the television reception signal led out to the contact terminal 4g on the antenna main body 4 side. This contact terminal 5g is planted on the upper surface of the antenna base portion 5, and each center conductor 7a of the antenna cable 7 is connected to the contact terminal 5g. A ground conductor 7b of this antenna cable 7 is connected to a nut 9 via a capacitor 8. Incidentally, the fitting 6 for mounting on the vehicle body is tightened and fixed to the nut 9 with a screw 10. On the other hand, the antenna base part 5 is composed of two upper and lower parts 5h and 5i, and is fastened and fixed from the lower surface side with screws (not shown).

Reference numeral 11 denotes a cable bushing for introducing and fixing the antenna cable 7 to the lower surface of the antenna base part 5, and 5j denotes a cable bushing at the center of the upper part of the antenna base part 5 where the contact terminal 5g is provided, from the front and back direction. A groove that prevents rainwater from entering by forming a discontinuous air layer. and,
5k is the wall 5 of the groove 5a with respect to the tip of the convex portion 5c.
b is an inclined portion formed corresponding to the opening direction on the opposite side. Next, a description will be given of an operation for attaching the antenna main body 4 to the antenna base 5 of the automobile antenna device having the above configuration.

FIG. 6 is a diagram showing the mounting operation of the antenna main body 4 on the antenna base 5 of the above-mentioned automobile antenna device, and FIG. 6(A) is a perspective view showing the mounting operation from the front end of the antenna main body 4. The figure (B) is a perspective view showing the installation operation from the rear end of the antenna main body 4, and the figure (C) is a perspective view showing the installation operation from the rear end of the antenna main body 4.
is a partially enlarged front view showing the completed state of installation.

In FIG. 6A, in order to slide and fix the antenna body 4 to the antenna base 5 from its front end, first, the rail 4j of the antenna body 4 is inserted into the groove 5a of the antenna base 5. , and further slide while pressing the inclined portion 5k of the convex portion 5c located in the middle of the groove 5a with the inclined portion 4l of the end of the rail 4j.

Then, the convex portion 5c of the groove 5a is pushed into the antenna base portion 5 corresponding to the passage period of the rail 4j, and thereafter the spring 5e is pushed into the interior of the antenna base portion 5 corresponding to the notch portion 4k of the rail 4j. The protrusion 5c is fitted into the notch 4k of the rail 4j, and the tip of the rail 4j stops against the wall 5b at the end of the groove 5a. Attachment of the antenna body section 4 to the base section 5 is completed.

In this case, the convex portion 5c of the groove 5a in the antenna base portion 5 has its inclined portion 5k aligned with the antenna body portion 4.
Since it is provided only in the direction of entry, unless the button 5d is pressed to bury the convex portion 5c inside the antenna base portion 5, the antenna main body portion 4 will not come off in the opposite direction. In addition, since there is a wall 5b at the end of the groove 5a, the antenna main body 4 will not come off in the advancing direction.

In FIG. 6(B), in order to slide and fix the antenna body 4 to the antenna base 5 from the rear end, the sliding direction of the antenna body 4 must be opposite to that from the front end. Just by changing from the rear end, the groove 5a and the rail 4j, the rail 4j and the protrusion 5c, and the protrusion 5c and the notch 5k.
The related actions such as these are exactly the same as the sliding fixation action described above.

When the antenna main body 4 is slidably fixed to the antenna base 5 in this way, the contact terminal 4g on the lower surface side of the skirt portion 4i of the antenna main body 4 is elastically deformed, and the contact terminal of the antenna main body 5 is 5g, and the television reception signal comes to be transmitted and derived to the antenna cable 7.

Here, grooves 5j are provided at the front and back positions of the upper center of the antenna base portion 5 provided with the contact terminals 5g.
Since rainwater entering from the front and rear directions can be prevented by forming a discontinuous air layer, even if rainwater does enter, the contact terminals 4g and 5g can be shifted diagonally. Therefore, there is no risk of short-circuit failure or the like.

Then, a rail 4j provided horizontally to the skirt portion 4i of the antenna main body portion 4 is placed along the groove 5a provided horizontally to both sides of the antenna base portion 5, and not only sliding fixation is achieved. , unless button 5d is pressed, rail 4
Since the fitted state between the notch 4k of the j and the protrusion 5c of the groove 5a is not released, and it is prevented from coming off in either the front or rear direction, even if the vehicle body is subjected to vertical vibration or wind pressure due to driving, the fit is maintained. A strong fixed state can be maintained without incomplete installation or poor contact.

Furthermore, since the antenna main body 4 can be easily attached to the antenna base 5 by the same sliding and fixing operation from either the front or back direction, it becomes easy to change the attachment between the left and right sides of the vehicle body. .

Therefore, according to the automobile antenna device having the above structure, the antenna main body 4 can be firmly attached to the antenna base 5 in any of the front and rear, left and right, and up and down directions. Since the antenna can be easily attached to or detached from the right or left side of the vehicle body, it is possible to realize an automobile antenna that is resistant to vibrations of the vehicle body and wind pressure, and is easy to remove when washing the vehicle.

[0035]

As described above, according to the present invention, there is provided an antenna main body portion including a rod antenna for receiving television radio waves and a printed circuit board antenna element, and an antenna main body portion that is attached to the lower end of the antenna main body portion along the front and rear direction. A skirt portion provided at the same position, a pair of rails provided horizontally symmetrically with respect to the opposite left and right side walls of the skirt portion, a notch portion formed at the same opposing position in the pair of rails, and a mounting bracket. an antenna base that is attached to the vehicle body through the
A groove is formed on the left and right side surfaces of the antenna base portion along the front and rear direction of installation, and a groove is provided in the skirt portion of the antenna body portion, into which a pair of rails are fitted and slid, respectively, and a groove is formed at a midway position of the groove. A convex portion is provided and is constantly biased in the left-right direction of the base by a spring force from inside the antenna base portion, and is integrally connected to the convex portion, which is fitted into the rail notch of the antenna main body. and a button for burying the convex portion inside the antenna base portion against the biasing force thereof, and a button provided on the lower surface side surrounded by the skirt portion of the antenna body portion to connect the rod antenna and the printed circuit board antenna element. One contact terminal from which a received television signal is derived is slidably fitted to the antenna main body provided on the upper surface side of the antenna base, and the convex portion is provided in the rail notch. Since the two contact terminals are crimped to one of the contact terminals in the fitted state and the other contact terminal inputs the television reception signal derived thereto, it has a fixed structure that is resistant to vertical vibrations of the vehicle body, and It is possible to provide an automobile antenna device that can be easily replaced between the left and right sides of the vehicle body.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which an automobile antenna device according to an embodiment of the present invention is attached to a vehicle body.

FIG. 2 is a side view showing the external configuration of the automotive antenna device.

FIG. 3 is a front view showing the external configuration of the automotive antenna device.

FIG. 4 is a diagram showing the internal configuration of the antenna main body in the automotive antenna device.

FIG. 5 is a diagram showing the configuration of an antenna base in the automotive antenna device.

FIG. 6 is a diagram showing an operation for attaching the antenna main body to the antenna base of the automotive antenna device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...Vehicle body trunk, 2...Antenna, 3, 6...Mounting metal fittings, 4...Antenna main body part, 4a...Rod antenna, 4b,
4c...Mold case, 4d...Mold case connection screw, 4e, 4f...Printed circuit board antenna element, 4g...Antenna side contact terminal, 4h...Lead wire, 4i...Skirt portion,
4j...Rail, 4k...Notch, 4l...Rail slope,
5...Antenna base part, 5a...Rail sliding groove, 5b...Wall,
5c... Convex portion, 5d... Button, 5e... Spring, 5f... Stopper, 5g... Base side contact terminal, 5h... Upper part of antenna base part, 5i... Lower part of antenna base part, 5j... Rainwater intrusion prevention groove,
5k...Protrusion tip inclined part, 7...Antenna cable, 7a...
Center conductor, 7b...Earth conductor, 8...Capacitor, 9...Nut, 10...Mounting bracket screw, 11...Cable bushing.

Claims (1)

[Claims] Claim 1: An antenna main body section equipped with a rod antenna and a printed circuit board antenna element for receiving television radio waves, a skirt section provided at the lower end of the antenna main body section along the front and back direction of attachment, and the skirt section. A pair of rails provided horizontally symmetrically with respect to the left and right opposing side walls of the section, a notch formed at the same opposing position in the pair of rails, and an antenna base that is attached to the vehicle body via a mounting bracket. a groove formed on the left and right side surfaces of the antenna base portion along the front and back direction of installation, into which a pair of rails provided on the skirt portion of the antenna body are respectively fitted and slid; A convex portion provided at an intermediate position and constantly biased in the left-right direction of the base by a spring force from inside the antenna base portion and fitted into the rail notch of the antenna body; a button which is connected to the button to bury the convex part inside the antenna base part against the biasing force thereof, and the rod antenna and the printed circuit board antenna which are provided on the lower surface side surrounded by the skirt part of the antenna main body part. One contact terminal from which a television reception signal received through the element is derived and the antenna body provided on the upper surface side of the antenna base are slidably fitted, and the rail notch is fitted with the antenna body. 1. An antenna device for an automobile, comprising: a contact terminal which is crimped to the one contact terminal in a state in which the convex portion is fitted, and inputs a television reception signal derived therefrom.