JP4133033B2 - Power supply device for film antenna - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply device for a film antenna that is electrically connected to a power supply terminal of a film antenna attached to a window glass such as a rear glass or a windshield of a car.
[0002]
[Prior art]
An example of a power supply device for a film antenna is disclosed in Japanese Patent Laid-Open No. 2000-196327. This prior art will be briefly described. A base end portion of a curved leaf spring as a contact is connected and fixed to the arrangement substrate, and this wiring substrate is accommodated and held in the case with the contact protruding. And a double-sided tape is affixed on the attachment surface of a case except the protrusion part of a contactor. With such a configuration, the case is attached to the window glass with a double-sided tape in a state in which the contact is elastically contacted with the feeding terminal of the film antenna.
[0003]
[Problems to be solved by the invention]
In the above prior art, since a leaf spring is used as the contact, the contact pressure with respect to the film antenna power supply terminal is not stable. Further, in order to allow the elastic deformation of the leaf springs with certainty, the structure accommodated in the case is simple as in the prior art, but it is difficult to produce a small overall. Therefore, when it is considered to insert and integrally form a leaf spring instead of the case, the mold considering the elastic deformation of the leaf spring becomes complicated and cannot be manufactured at low cost.
[0004]
Here, the film antenna power supply device is fixed by being stuck to a window glass with a double-sided tape, and it is difficult to say that the mechanical strength for fixing is large. Therefore, as the film antenna power supply device is larger and heavier, it may be unfixed due to an impact caused by a car accident or the like, resulting in an unexpected situation. For this reason, it is desirable to reduce the size and weight of the film antenna power supply device.
[0005]
The present invention has been made in view of the circumstances as described above, and an object thereof is to provide a film antenna power supply apparatus that can be easily reduced in size and weight.
[0006]
[Means for Solving the Problems]
In order to achieve such an object, the film antenna power supply device of the present invention is a power supply device that is electrically connected to the power supply terminal of the film antenna, and is inserted with a spring connector electrically connected to a conductive cable, The tip is protruded from the mounting surface and the mounting member is formed of an insulating resin, the tip of the plunger is hemispherical and the hemispherical radius is set to at least 3.5 times the thickness of the film antenna, A double-sided tape thicker than the film antenna is attached to a portion of the mounting surface that does not correspond to the film antenna in a state where the power supply terminal is opposed to the tip of the plunger, and the mounting member is attached to the window glass with the double-sided tape. adhered to, and the film is not adhered to the feeding portion of the antenna on the window glass structure, the double-sided tape Insert the feeding portion of the said mounting surface is not provided with the gap of the window glass film antenna, contact [0007] the plunger to the power supply terminal
Also, a power feeding device that is electrically connected to the power feeding terminal of the film antenna, inserts a spring connector that is electrically connected to a conductive cable, and protrudes the tip of the plunger from the mounting surface to mold the mounting member with an insulating resin. The tip of the plunger has a conical shape, and the axial dimension of the conical shape is set longer than the thickness of the film antenna, and the film antenna on the mounting surface is in a state where the feeding terminal is opposed to the tip of the plunger. Is attached to the window glass with the double-sided tape thicker than the film antenna, and the feeding member of the film antenna is not attached to the window glass. , of the film antenna in a gap of the window glass and the double-sided tape is not provided the mounting surface Insert the serial feeding portion may be configured so as to abut the plunger to the feeding terminal.
[0008]
Further, the feeding portion of the film antenna corresponds to a substantially rectangular shape at one corner including the protruding portion of the tip of the plunger on the mounting surface with the feeding terminal facing the tip of the plunger. The double-sided tape may be attached in a substantially L shape to the mounting surface where the film antenna does not correspond.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1A and 1B are external views of a power supply device for a film antenna according to the present invention, wherein FIG. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a bottom view, FIG. Is a left side view. FIG. 2 is an enlarged view taken along the line AA in FIG. FIG. 3 is a plan view in which the film antenna power feeding device of the present invention is disposed in the power feeding portion of the film antenna. FIG. 4 is an enlarged vertical cross-sectional view of the film antenna power supply device of the present invention in a state in which a spring connector is elastically contacted with the power supply terminal of the film antenna. 5 is a cross-sectional view taken along the line BB in FIG. FIG. 6 is a diagram showing the hemisphere at the tip of the plunger and the thickness of the film antenna. FIG. 7 is a diagram showing a conical shape of a modification of the tip of the plunger and the thickness of the film antenna.
[0010]
First, the conductive wire of the conductive cable 12 is appropriately electrically connected by soldering or the like to the other end of the conductive tube of the spring connector 10 in which the tip of the plunger 10a protrudes from one end of the conductive tube so as to be movable in the axial direction. Fixed together. The spring connector 10 to which the conductive cable 12 is electrically connected is inserted into a mold, and the mounting member 14 is integrally formed of insulating resin. The tip of the plunger 10a is formed in a state slightly protruding from the mounting surface 14a of the mounting member 14.
[0011]
In the insert molding of the mounting member 14, the distal end portion of the spring connector 10 on the side of the plunger 10 a of the conductive tube is inserted into the concave hole of the mold and the other end side of the conductive tube is appropriately pressed to the mold. Thus, the spring connector 10 can be easily positioned. And the protrusion part of the plunger 10a which protrudes from a conductive tube is protected by the concave hole of a metal mold | die, and a movement is not inhibited by penetration | invasion of molding resin. Therefore, the structure of the mold for molding the mounting member 14 is relatively simple, and the mounting member 14 can be molded at a low cost.
[0012]
Further, the double-sided tape 16 is attached in a substantially L shape on the mounting surface 14a of the mounting member 14 except for a substantially rectangular shape including a protruding portion of the plunger 10a. The thickness of the double-sided tape 16 is set to be thicker than the film antenna 18 in a state where the peel seal 16a is peeled off. 3 and 5, when the mounting member 14 is disposed on the window glass 20 with the tip of the plunger 10a elastically contacting the feeding terminal 18a of the film antenna 18, the substantially L-shaped cut of the double-sided tape 16 is provided. It is formed so that two orthogonal sides of the feeding portion of the film antenna 18 correspond to the notch.
[0013]
In such a configuration, as shown in FIG. 5, the mounting member is attached with the double-sided tape 16 so that the tip of the plunger 10 a is elastically contacted to the feeding terminal 18 a of the feeding portion of the film antenna 18 appropriately attached to the window glass 20. If 14 is adhered and fixed to the window glass 20, the feeding terminal 18 a of the film antenna 18 can be electrically connected to an appropriate antenna circuit via the spring connector 10 and the conductive cable 12. In attaching the attachment member 14, the attachment member 14 is used as a target for making the substantially L-shaped notch of the double-sided tape 18 correspond to two orthogonal sides of one corner of the feeding portion of the film antenna 18. Protrusions 14b for marks are provided on the side surfaces. In a state where the attachment member 14 is adhered, the plunger 10a is in a state where the plunger 10a abuts against the power supply terminal 18a and is pulled into the tube a little against the elasticity, and the spring connector so that the elasticity becomes a predetermined pressure. By setting 10 springs, a desired small contact resistance value can be obtained. In addition, since the double-sided tape 16 is thicker than the film antenna 18, the attachment of the attachment member 14 does not float from the window glass 20, and can be reliably attached.
[0014]
By the way, if the feeding portion of the film antenna 18 is not attached to the window glass 20, the feeding portion can be shifted along the window glass 20. Therefore, as shown in FIG. 6, the tip of the plunger 10 a is hemispherical, and its radius R is considerably larger than the thickness t of the film antenna 18, so that the attachment member 14 is attached to the window glass 20 in advance with the double-sided tape 16. In this state, the feeding portion of the film antenna 18 is inserted into the gap between the mounting surface 14a and the window glass 20, and the plunger 10a is pushed up by the wedge effect due to the hemispherical shape at the tip of the plunger 10a to allow insertion, and the feeding terminal 18a It can be set as the position which the plunger 10a contacts. Then, it can be inserted into the substantially L-shaped notch of the double-sided tape 16 until two orthogonal sides of the feeding portion of the film antenna 18 come into contact with each other, and can act as positioning for the mounting member 14. According to the experiments by the inventors, if the force acting in the axial direction so as to push up the plunger 10a from the insertion of the film antenna 18 is larger than the force acting in the direction orthogonal to the axial direction, the plunger 10a is resisted against elasticity. The film antenna 18 could be inserted by pushing it up. Therefore, the hemispherical radius R at the tip of the plunger 10a may be about 3.5 times or more with respect to the thickness t of the film antenna 18.
[0015]
Furthermore, as shown in FIG. 7, the tip of the plunger 10a may have a substantially conical shape as shown in FIG. 7 in order to push up the plunger 10a by the wedge effect due to the insertion of the film antenna 18. The substantially conical axial dimension d may be larger than the thickness t of the film antenna 18.
[0016]
In the above embodiment, the conductive cable 12 is soldered to the conductive tube of the spring connector 10. However, the conductive cable 12 may be electrically connected to the conductive tube of the spring connector 10 by appropriate caulking. . Further, the double-sided tape 16 attached to the attachment surface 14a of the attachment member 14 is not limited to a substantially L shape, and the portion where the tip of the plunger 10a protrudes and the portion where the double-sided tape 16 is attached are separated by a straight line. May be. Furthermore, a portion corresponding to a substantially L shape to which the double-sided tape 16 is attached may be formed on the attachment surface 14a of the attachment member 14 by being separated by a step from the portion from which the plunger 10a protrudes. In such a case, the total thickness of the step and the double-sided tape 16 may be formed so as to be larger than that of the film antenna 18.
[0017]
【The invention's effect】
As described above, since the film antenna power supply device of the present invention is configured, the following advantageous effects can be obtained.
[0018]
In any of the film antenna power supply devices according to claims 1 and 2, since the mounting member is formed by inserting the spring connector electrically connected to the conductive cable, the structure can be made small and lightweight. Moreover, the structure of the molding die is simple and can be manufactured at low cost. In addition, the double-sided tape that is thicker than the film antenna is attached to the mounting surface of the mounting member that is not compatible with the film antenna with the tip of the plunger facing the power supply terminal. The power feeding device of the present invention can be mechanically and firmly fixed. Then, the feeding portion of the film antenna can be shifted along the window glass as a structure that is not attached to the window glass, and the attachment of the part where the plunger of the mounting member that is previously attached to the window glass with the double-sided tape protrudes The feeding portion of the film antenna is inserted into the gap between the surface and the window glass, and the plunger is pushed up against the elasticity by the wedge effect to allow the insertion, so that the plunger can be brought into elastic contact with the feeding terminal. An attachment member previously attached to the window glass can be utilized when replacing the film antenna, which is beneficial.
[0019]
In the power supply device for a film antenna according to claim 3, since the double-sided tape is affixed to the mounting surface of the mounting device in a substantially L shape, the substantially L-shaped notch is formed at the corner of the power feeding portion of the film antenna. Both of them can be easily positioned.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an external view of a power supply device for a film antenna according to the present invention, where (a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a right side view, (e) Is a left side view.
FIG. 1 is an enlarged view taken along the line AA in FIG.
FIG. 3 is a plan view in which the film antenna power supply device of the present invention is disposed in the power supply portion of the film antenna.
FIG. 4 is an enlarged vertical cross-sectional view of the film antenna power supply device of the present invention in a state in which a spring connector is elastically contacted with a power supply terminal of the film antenna.
5 is a cross-sectional view taken along the line BB in FIG. 4;
FIG. 6 is a diagram showing the hemisphere at the tip of the plunger and the thickness of the film antenna.
FIG. 7 is a diagram showing a conical shape of a modification of the tip of the plunger and the thickness of the film antenna.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Spring connector 10a Plunger 12 Conductive cable 14 Mounting member 14a Mounting surface 14b Protrusion for a mark 16 Double-sided tape 18 Film antenna 18a Feed terminal 20 Window glass

Claims (3)

A power supply device that is electrically connected to a power supply terminal of a film antenna, wherein a spring connector electrically connected to a conductive cable is inserted, a tip of a plunger is protruded from an attachment surface, and an attachment member is formed of an insulating resin, The tip of the plunger is hemispherical, the radius of the hemisphere is set to at least 3.5 times the thickness of the film antenna, and the power supply terminal is opposed to the tip of the plunger. A part of the film antenna that does not correspond is attached with a double-sided tape that is thicker than the film antenna, the attachment member is attached to the window glass with the double-sided tape, and a feeding part of the film antenna is attached to the window glass. a non structure is, the film en the mounting surface on which the double-sided tape is not provided with the gap of the window glass Insert the feeding portion of the Na, the film-antenna feeder apparatus characterized by being configured so as to abut the plunger to the feeding terminal. A power supply device that is electrically connected to a power supply terminal of a film antenna, wherein a spring connector electrically connected to a conductive cable is inserted, a tip of a plunger is protruded from an attachment surface, and an attachment member is formed of an insulating resin, The tip of the plunger is conical and the axial dimension of the cone is set to be longer than the thickness of the film antenna, and the film antenna on the mounting surface corresponds to the tip of the plunger facing the feeding terminal. To the part that does not, a double-sided tape thicker than the film antenna is attached, the attachment member is attached to the window glass with the double-sided tape, and the feeding portion of the film antenna is not attached to the window glass, the sheet of the film antenna the mounting surface sided tape is not provided with the gap of the window glass Insert the part, the film-antenna feeder apparatus characterized by being configured so as to abut the plunger to the feeding terminal.   In the film antenna power supply device according to claim 1 or 2, in a state where the power supply terminal is opposed to the tip of the plunger, the mounting surface has a substantially rectangular shape at one corner including a protruding portion of the tip of the plunger. A feeding device for a film antenna, characterized in that the feeding portion of the film antenna corresponds, and the double-faced tape is pasted in a substantially L shape on the mounting surface of the portion that does not correspond to the film antenna. .

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