JPS6340882Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an antenna device in which an antenna element is extendably and rotatably attached to a television or radio set.

Conventionally, West German Patent No. 1278565,
As in the same No. 1292707, the molded product is made of synthetic resin, and the above-mentioned mounting body for the set and the guide tube for the antenna element are integrally molded.
It is known that the molded product is equipped with a connection ball formed into a cylinder by punching out a sheet of plate material up to the power supply terminal portion. Although these antenna devices have been highly evaluated for their low cost, they have the following problems in terms of performance and durability.

In other words, molded products in which the synthetic resin mounting body and guide tube are integrally molded are often made of inexpensive acrylic butadiene styrene (hereinafter referred to as ABS), and moreover, the parts that are fixed to the set are not enough. Even the surface that slides on the antenna pole and the surface that locks the antenna pole when pulled out.
It is integrally molded from synthetic resin. For this reason, molded products made of cheap materials such as ABS,
It is difficult to achieve dimensional accuracy during molding, and the precision of the inclined guide and the slit parts connected to it is insufficient, resulting in these parts opening, and the stopper protrusion provided on the washer at the lower end of the antenna element does not catch properly, causing the slit to open. Depending on the temperature conditions when the antenna device is used, such as when the antenna pole is used in cold regions, the elastic contact surface may slip off the top end due to changes in the hardness of the resin material. The dynamic state changes, and it becomes a sliding motion that seems to be caught.
Smooth and stable contact sliding cannot be obtained. Regarding this, there is an idea that a high-grade synthetic resin material that does not have the above-mentioned drawbacks should be selected and used. However, this method requires expensive materials and several times the cost of the final product, making it impossible to put it into practical use. In addition, although it is sufficient that the metal part of the antenna element simply slides against the synthetic resin molded product, the protrusion collides with the upper end of the slit thousands of times when the antenna pole is pulled out. In this case, this part collapses and normal drawer operation becomes impossible. In other words, if synthetic resin is used in parts that are repeatedly subjected to strong impact forces, the mechanical strength will be insufficient.

In addition, the connection spring is made by integrally forming one spring plate up to the power supply terminal part, and this spring is inserted into a synthetic resin molded product.The above spring is easy to manufacture and easy to assemble. However, it lacks durability during use. In other words, the power supply wire is soldered to the terminal side and routed inside the set, but if an impact or tensile force is applied to the terminal at this time, the bent base of the terminal returns to its pre-bent shape and becomes elastic. The terminal itself may fall out or the terminal may break off from the base. This is because conventional antenna devices require smooth contact when the antenna pole slides without taking into account the impact and tensile force applied to the terminal, so a thin spring plate is used to connect the feeding terminal. This is due to the fact that the part is formed integrally with the ball.

The present invention is an attempt to eliminate the drawbacks of the conventional device described above, and the mounting body for the mounted member such as a television or radio set is made of an insulating synthetic resin molded product, and the guide tube and elastic The ball is made of a separate metal material, and the guide tube is provided with a locking piece for fixing it to the mounting body, a power supply terminal portion, and a series of inclined guides and slits, and the ball is attached to the guide tube. The purpose is to provide an antenna device with improved performance and durability, while being inexpensive and not much different from conventional ones, by fitting and fixing these to the support tube of the mounting body. There is.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the present invention.
In these figures, reference numeral 1 denotes a mounting body made of an integrally molded insulating synthetic resin.A mounting hole 3 for a member to be mounted is formed in a board 2, and two support tubes 4 are provided on the back surface of the board 2. The support tube 4 is integrally formed with a rectangular engagement hole 5 and a positioning protrusion 6 for the attached member.
The hole 7 in the support tube 4 has a smaller diameter on the surface side than the step 7a provided at one end, and is open to the surface of the substrate 2. Further, reference numeral 8 denotes a guide tube made of a conductive metal material, and the guide tube 8 has a power supply terminal portion 10 and a locking piece 9 cut and raised on the outer periphery and is protruded by a tongue piece, and has an annular shape on the inner periphery of one end. A retaining protrusion 11 is provided in a protruding manner, and an inclined guide 12 and a slit 13 that are open at the other end and extend along the axial direction are formed in series. The guide tube 8 is obtained by drawing a drawn pipe and subjecting it to press work such as punching. Further, reference numeral 14 denotes a ball made of a conductive metal material for feeding power and holding the element.
4 has a substantially cylindrical shape with a slit 15 extending along the entire length in the axial direction formed at one location in the circumferential direction, and slits 16 extending along the axial direction at multiple locations in the circumferential direction, and a central portion in the axial direction. A contact surface 17 with the antenna element 18 is formed on the center side and has an arcuate side cross section. The antenna element 18 is fitted with a plurality of antenna poles 19 so as to be expandable and contractible.
A knob 20 is fixed to the tip of the smallest diameter pole, a base metal fitting 21 is fixed to the base end of the largest diameter base pole, this metal fitting 21 is pivotally connected to the base metal fitting 23 with a pin 22, and the end face of the base metal fitting is attached to the ball The ball 26 and the spring 24 are supported by the base metal fitting 23 with a spring 24 via a ball 26 and housed in the base metal fitting 23. A washer 25 for generating rotational friction torque is fitted into the base end of the base metal fitting 23.
As shown in FIG.
is supported via a bowl-shaped spring 27.

The antenna device made of the above-mentioned members is constructed by fitting the elastic member 14 into one end of the guide tube 8.
is inserted into the hole 7 in the support cylinder 4 of the mounting body 1, the locking piece 9 is engaged with the engagement hole 5 of the support cylinder 4, and the elastic
4 are supported and sandwiched between the step 7a of the hole 7 of the mounting body 1 and the retaining protrusion 11 of the guide tube 8, so that the guide tube 8 and the spring 14 are positioned and fixed to the mounting body 1, Power supply terminal section 10 provided on the guide tube 8
protrudes from the end of the support cylinder 4. Further, the antenna element 18 is fitted into the mounting body 1, the elastic member 14, and the guide tube 8, and the base pole 19 of the antenna element 18 is elastically supported on the contact surface 17 of the elastic member 14 so as to be slidable and rotatable. A stopper protrusion 25a of the washer 25 is engaged with the slit 13 of the guide tube 8 via the inclined guide 12. Then, when the antenna pole 19 is pulled out and the stopper projection 25a is engaged with the slit 13,
The base metal fitting 21 and the antenna pole 19 coupled thereto are tilted about the pin 22.

In the embodiment described above, the protrusion 11 of the guide tube 8 is annularly protruded, but in the present invention, the portion of the guide tube 8 into which the elastic member 14 fits has a large diameter, and the protrusion 11 of the guide tube 8 is formed in a stepped manner. , thereby making the distal end side smaller in diameter.

Further, although the dipole type antenna device has been described in the above embodiment, the present invention can also be applied to a monopole type antenna device as shown in FIG. In FIG. 5, reference numeral 28 is a threaded part formed at the base of one support cylinder 4 of the mounting body 1, and a nut 29 screwed into this threaded part 28 and a board 2 without a mounting hole are used to attach the mounted member. is sandwiched and the mounting body 1 is fixed thereto, by providing a flat part 28a in a part of the threaded part 28 and providing a hole of a corresponding shape in the member to be mounted, This is to prevent the mounting body from rotating. Further, the configuration of the embodiment shown in FIG. 5 other than that described above is
Since it is the same as that shown in the figure, corresponding parts are given the same reference numerals as in FIGS. 1 to 3 in FIG. 5, and their explanation will be omitted.

As explained above, in the antenna device of the present invention, the mounting body 1 to be attached to a member to be mounted is formed of an integrally molded product of insulating synthetic resin, and the engagement hole 5 is formed in the support cylinder 4 provided on the mounting body 1. A power supply terminal portion 10 and a locking piece 9 are provided on the outer periphery of the guide tube 8 made of a conductive metal material.
A retaining protrusion 11 is provided on the inner periphery of one end of the guide tube 8, and a slit 13 and an inclined guide 12 opening at the other end in the axial direction of the guide tube 8 are formed in series. An antenna element holding elastic 14 made of a conductive metal material is fitted to one end of the cylinder 8, and the guide cylinder 8 is fitted into the support cylinder 4 of the mounting body 1, and the locking piece 9 is inserted into the fitting hole. 5, and both ends of the elastic 14 are connected to the step 7a of the mounting body 1.
and an antenna element 18 which is supported and clamped by the retaining protrusion 11, and which is further fitted into the mounting body 1, the bullet 14 and the guide tube 8, and is elastically supported by the bullet 14 so as to be slidable and rotatable. A washer 25 having a stopper protrusion 25a that can be engaged with the slit 13 is attached to the base metal fitting 23.

According to the present invention, the mounting body 1 uses an inexpensive synthetic resin material similar to or lower than conventional ones,
The sliding surface with the antenna pole 19, the part that becomes a locking part, and the part to which impact force is applied are placed on the side of the metal material of the ball 14 and the guide tube 8, so that mechanical accuracy and dimensional accuracy can be obtained. In addition, the guide tube 8 itself can be formed with the engaging piece 9, the power supply terminal portion 10, the retaining protrusion 11, the inclined guide 12, and the slit 13 by press working on the pipe material, making the processing easy and the cost comparable. It is easy to assemble and is easy to assemble by inserting the elastics 14 into the guide tube 8 from one end, and then inserting them into the support tube 4 of the mounting body 1.
The guide tube 8 and the bullet 14 can be assembled to the mounting body 1. Therefore, the present invention can provide an antenna device with high mechanical strength and dimensional accuracy.
It has good performance, is durable, and costs almost nothing compared to conventional products. In other words, unlike conventional devices, the antenna device of the present invention is not adversely affected by temperature changes during molding or use, and can exhibit stable functionality, and even if the feeding terminal is pulled by the feeding line, the feeding terminal will remain intact. Since the provided guide tube and the ball are independent, there is no adverse effect on electrical contact, and the metal guide tube has a slit that engages with the stopper protrusion, which provides high strength. It has the advantage of being durable, easy to assemble, and costing almost the same as conventional products.

[Brief explanation of drawings]

Fig. 1 is a partially longitudinal side view showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of a partially sectional main part of the same, Fig. 3 is a bottom view of the mounting body, Fig. 4 5 is a perspective view of the washer, and FIG. 5 is a side view of the main parts showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Mounting body, 4... Support tube, 5... Engagement hole, 7a...
Stage, 8... Guide tube, 10... Power supply terminal portion, 9... Locking piece, 11... Retaining protrusion, 12... Inclined guide,
13...Slit, 14...Bullet, 18...Antenna element, 19...Antenna pole, 22...Base metal fitting, 25
...Watushia, 25a...Protrusion for stopper.

Claims (1)

[Scope of utility model registration request] The mounting body to be attached to the mounted member is made of an integrally molded insulating synthetic resin, an engagement hole is formed in the support cylinder provided on the mounting body, and a power supply terminal portion is formed on the outer periphery of the guide cylinder made of a conductive metal material. A locking piece protrudes, a retaining protrusion is provided on the inner periphery of one end of the guide tube, and a slit is formed in series with an inclined guide opening at the other end in the axial direction of the guide tube. An antenna element holding elastic made of a conductive metal material is fitted to one end, the guide cylinder is fitted into the support cylinder of the mounting body, the locking piece is engaged with the fitting hole, and the elastic Both ends of the child are supported and clamped by the stage of the mounting body and the retaining protrusion, and are further fitted into the mounting body, the bullet, and the guide tube, and are elastically supported by the bullet so that they can slide and rotate. An antenna device characterized in that a washer having a stopper protrusion that can be engaged with the slit is attached to the base metal fitting of the antenna element.