CN211208667U - Frequency modulation broadcasting antenna - Google Patents

Abstract

The utility model provides a frequency modulation broadcasting antenna, be in including the contact tube with alternate the conducting rod in the contact tube, the one end of contact tube is provided with the external screw thread section, the one end of conducting rod is followed the contact tube has the one end of external screw thread section is worn out, the cover is equipped with the gland on the conducting rod, seted up on the gland with external screw thread section screwed connection's internal thread hole, the fastening stopper has been alternate in the internal thread hole, the one end of fastening stopper has the conical surface, just the fastening stopper has the one end of conical surface alternates in the inside wall of contact tube with between the lateral wall of conducting rod, be provided with the scale mark on the conducting rod. Through setting up gland and fastening stopper, can be in the same place firm the linking together between conductive sleeve and the conducting rod after adjusting the relative position between them, stability is better relatively, is convenient for learn flexible length directly perceived when adjusting the relative position between conducting tube and the conducting rod simultaneously through setting up the scale, and it is comparatively convenient to use.

Description

Frequency modulation broadcasting antenna

Technical Field

The utility model relates to an antenna, especially a frequency modulation broadcasting antenna.

Background

An antenna is a converter that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium or vice versa, and is widely used in various radio devices.

The length of the existing FM broadcast antenna is usually fixed, and the whole antenna can only be replaced when the FM broadcast antennas with different lengths are needed, so that the use is inconvenient. At present, telescopic antennas exist in equipment such as radios and the like, but the telescopic antennas are mainly fastened between two telescopic rods through friction between the two telescopic rods or elastic sheets arranged between the two telescopic rods, and when the telescopic antennas are applied to frequency modulation broadcasting antennas, the telescopic antennas can overcome the action force of the friction or the elastic sheets under the action of gravity to generate relative sliding, so that the stability is relatively poor; in addition, the length of the fm broadcast antenna is not adjustable, and needs to meet the specific wavelength requirement, but the telescopic length of the telescopic antenna is usually difficult to know when the telescopic antenna is telescopic, and the telescopic structure is inconvenient to use even if the telescopic structure can be applied to the fm broadcast antenna.

In view of the above, the applicant has made an intensive study on the structure of a frequency modulation broadcast antenna, and has made this disclosure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stability is better and convenient to use's frequency modulation broadcasting antenna relatively.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a frequency modulation broadcasting antenna, is in including the contact tube with alternate the conducting rod in the contact tube, the one end of contact tube is provided with the external screw thread section, the one end of conducting rod is followed the contact tube has the one end of external screw thread section is worn out, the cover is equipped with the gland on the conducting rod, seted up on the gland with external screw thread section screwed connection's internal thread hole, the internal thread downthehole interlude has the cover to be established fastening stopper on the conducting rod, the one end of fastening stopper has the conical surface, just the fastening stopper has the one end of conical surface alternates in the inside wall of contact tube with between the lateral wall of conducting rod, be provided with the scale mark of arranging along its length direction on the conducting rod.

As an improvement of the utility model, the conducting rod is located one end in the conducting tube is provided with and supports and is in liquid bead on the conducting tube inside wall.

As an improvement of the utility model, the current-conducting tube is the aluminum pipe, the current-conducting rod is the aluminum bar, the fastening stopper is the aluminium stopper.

As an improvement of the utility model, still include metal base, metal base's lower extreme is connected with antenna joint, and the upper end is connected with insulating casing, the electric conduction tube alternates on the insulating casing, just the electric conduction tube with be connected with the metal connecting rod between the antenna joint, the metal connecting rod alternates on the metal base and with metal base non-contact.

As an improvement of the utility model, the metal base with the centre gripping has insulating setting element between the insulating casing, the metal connecting rod alternates and is in on the insulating setting element.

As an improvement of the utility model, the side wall of the metal base is directly or indirectly connected with a steel whip which is vertically arranged with the conductive tube.

As an improvement of the utility model, still include the insulating tube, the one end of insulating tube be connected with simultaneously with the first conductive contact that metal base connects, the other end be connected with simultaneously with the second conductive contact that the steel whip is connected, it has the normal direction spring to alternate in the insulating tube, the one end of normal direction spring is supported and is pushed up on the first conductive contact, and the other end is supported and is pushed up on the second conductive contact.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

1. through setting up gland and fastening stopper, can be in the same place firm the linking together between conductive sleeve and the conducting rod after adjusting the relative position between them, stability is better relatively, is convenient for learn flexible length directly perceived when adjusting the relative position between conducting tube and the conducting rod simultaneously through setting up the scale, and it is comparatively convenient to use.

2. By adopting the normal spring as the inductor, the frequency is stabilized, the bandwidth is increased, and the durability is relatively good.

Drawings

Fig. 1 is a schematic structural view of the fm broadcast antenna of the present invention, in which parts such as a steel whip are omitted;

fig. 2 is the schematic structural diagram of the steel whip position of the fm broadcast antenna of the present invention.

The corresponding designations in the figures are as follows:

10-a conductive tube; 20-a conductive rod;

21-a gland; 22-a fastening plug;

23-liquid beads; 30-a metal base;

31-an antenna connection; 32-an insulating housing;

33-a metal connecting rod; 34-a conductive contact;

35-connecting threaded holes; 36-an insulating spacer;

40-steel whip; 41-an insulating tube;

42-a first conductive contact; 43-a second conductive contact;

44-normal spring; 45-dropping plastic caps.

Detailed Description

The utility model is further explained by the following specific embodiments:

as shown in fig. 1-2, the fm broadcast antenna provided in this embodiment includes a conductive tube 10 and a conductive rod 20 inserted in the conductive tube 10 and capable of sliding relative to the conductive tube 10, wherein the conductive tube 10 is an aluminum tube, and the conductive rod 20 is an aluminum rod.

An external thread section is arranged at one end of the conductive tube 10, one end of the conductive rod 20 penetrates out from the end of the conductive tube 10 with the external thread section, a gland 21 is sleeved on the conductive rod 20, the gland 21 is preferably an aluminum cap, an internal thread hole in spiral connection with the external thread section of the conductive tube 10 is formed in the gland 21, a fastening plug 22 sleeved on the conductive rod 20 is inserted in the internal thread hole, the fastening plug 22 is preferably an aluminum plug, one end of the fastening plug 22, as if the end of the internal thread hole part of the gland 21, is provided with a conical surface or a step surface, and one end of the fastening plug 22, which is provided with the conical surface or the step surface, is inserted between the inner side wall of the conductive tube 10 and the outer side wall of the conductive rod 20; thus, when the gland 21 is screwed down, the fastening plug 22 is squeezed between the inner side wall of the contact tube 10 and the outer side wall of the contact rod 20, so as to tightly hold the contact rod 20 and expand the conductive sleeve 10, so that the contact rod 20 and the conductive sleeve 10 cannot move relatively; when the relative position between the conductive rod 20 and the conductive sleeve 10 needs to be adjusted, the conductive rod 20 and the conductive sleeve 10 can move relative to each other only by unscrewing the gland 21 and pulling the conductive rod 20 to make the fastening plug 22 fall off from between the inner side wall of the conductive tube 10 and the outer side wall of the conductive rod 20.

In addition, the conductive rod 20 is provided with scale marks (not shown in the figure) arranged along the length direction thereof, so that the telescopic length can be conveniently and visually known when the relative position between the conductive tube 10 and the conductive rod 20 is adjusted, and the use is convenient. Preferably, one end of the conductive rod 20 located inside the conductive tube 10 is provided with a liquid bead 23, a ball or other guiding member abutting against the inner side wall of the conductive tube 10, so as to help prevent the conductive rod 20 from shaking radially relative to the conductive tube 10 and ensure signal stability.

The fm broadcast antenna provided by the embodiment further includes a metal base 30, the lower end of the metal base 30 is screwed with an antenna connector 31 for connecting with a radio device using the antenna, the upper end of the metal base 30 is screwed with an insulating housing 32, and the screwed connection positions of the antenna connector 31, the insulating housing 32 and the metal base 30 are coated with thread glue to prevent the threads from loosening or loosening. One end of the conductive tube 10, which is far away from the external thread section, is inserted on the insulating shell 32, and the connection position between the conductive tube 10 and the insulating shell 32 is coated with silica gel, so that the conductive tube 10 can be supported by the insulating shell 32 to avoid shaking. Be connected with metal connecting rod 33 between electric conduction tube 10 and the antenna connector 31, it is concrete, soldering fixed connection is passed through on antenna connector 31 to the one end of metal connecting rod 33, other end fixed connection has the conductive connector 34 of fixed connection in the hole of electric conduction tube 10 to this electricity between electric conduction tube 10 and the antenna connector of realization, simultaneously, metal connecting rod 33 alternates on metal base 30 and with metal base 30 contactless, offer the hole that is used for alternating metal connecting rod 33 on metal base 30 promptly, metal connecting rod 33 and the lateral wall of this hole contactless.

Preferably, in order to avoid the metal connecting rod 33 from being touched with the metal base 30 due to shaking, in this embodiment, the insulating positioning part 36 is clamped between the metal base 30 and the insulating housing 32, the metal connecting rod 33 is inserted into the insulating positioning part 36, the insulating housing 32 can be inserted into the conductive tube 10 first during assembly, the metal connecting rod 33 is inserted into the insulating positioning part 36 and is fixedly connected with the conductive tube 10 through the conductive connector 34, and then the insulating housing 32 is spirally connected onto the metal base 30, so that assembly is convenient, and debugging is convenient.

Directly or indirectly be connected with the steel whip 40 of arranging perpendicularly with electric conduction tube 10 on metal base 30's the lateral wall, it is concrete, the frequency modulation broadcast antenna that this embodiment provided still includes insulating tube 41, the one end of insulating tube 41 is connected with the first conductive contact 42 of being connected with metal base 30 simultaneously, the other end is connected with the second conductive contact 43 of being connected with steel whip 40 simultaneously, and it has normal spring 44 to alternate in insulating tube 41, the one end of this normal spring 44 is supported and is pushed up on first conductive contact 42, the other end is supported and is pushed up on second conductive contact 44, each conductive contact 42 all through screwed connection's mode and the spare part fixed connection that corresponds, and all scribble the thread glue in each hookup location department. It should be noted that, more than two connection threaded holes 35 matched with the first conductive contact 42 are formed in the metal base 30, and one of the connection threaded holes 35 of the first conductive contact 42 can be selected according to actual requirements to perform a screw connection.

Preferably, the end of the steel whip 40 away from the second conductive contact 43 is sleeved with a drip cap 45. In addition, the fm broadcast antenna provided in this embodiment further includes a supporting tube (not shown in the figure) for covering the metal base 30 and the plastic casing 32, and a avoiding hole is formed at a position of the supporting tube corresponding to the connecting threaded hole.

The fm broadcast antenna provided in this embodiment is used in the same manner as a conventional broadcast antenna, and will not be described in detail here.

The present invention has been described in detail with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can modify the present invention according to the prior art, such as changing the normal spring 44 in the above embodiments into an inductance coil, etc., which all belong to the protection scope of the present invention.

Claims (7)

1. The utility model provides a frequency modulation broadcasting antenna, its characterized in that includes the contact tube and alternates the conducting rod in the contact tube, the one end of contact tube is provided with the external screw thread section, the one end of conducting rod is followed the contact tube has the one end of external screw thread section is worn out, the cover is equipped with the gland on the conducting rod, set up on the gland with external screw thread section screwed connection's internal thread hole, the internal thread downthehole interlude has the cover to be established fastening plug on the conducting rod, the one end of fastening plug has the conical surface, just the fastening plug has the one end of conical surface alternates between the inside wall of contact tube with between the lateral wall of conducting rod, be provided with the scale mark of arranging along its length direction on the conducting rod.

2. A fm broadcast antenna as claimed in claim 1, wherein said conductive rod is provided with a bead at an end thereof located within said conductive tube, said bead abutting against an inner sidewall of said conductive tube.

3. A fm broadcast antenna as claimed in claim 1, wherein said conductive tube is an aluminum tube, said conductive rod is an aluminum rod, and said fastening plug is an aluminum plug.

4. A fm broadcast antenna according to any of claims 1-3, further comprising a metal base, wherein an antenna connector is connected to a lower end of said metal base, an insulating housing is connected to an upper end of said metal base, said conductive tube is inserted into said insulating housing, and a metal connecting rod is connected between said conductive tube and said antenna connector, said metal connecting rod is inserted into said metal base and does not contact with said metal base.

5. A FM broadcast antenna as claimed in claim 4, wherein an insulating positioning member is clamped between said metal base and said insulating housing, and said metal connecting rod is inserted through said insulating positioning member.

6. A FM broadcast antenna as claimed in claim 4, wherein a steel whip is directly or indirectly attached to a side wall of said metal base and is arranged perpendicular to said conductive tube.

7. A FM broadcast antenna as claimed in claim 6, further comprising an insulating tube, wherein one end of said insulating tube is connected to a first conductive contact connected to said metal base and the other end of said insulating tube is connected to a second conductive contact connected to said steel whip, and a normal spring is inserted into said insulating tube, one end of said normal spring abuts against said first conductive contact and the other end abuts against said second conductive contact.

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