CN210805991U

CN210805991U - Vehicle-mounted directional DTMB television antenna

Info

Publication number: CN210805991U
Application number: CN201921837969.9U
Authority: CN
Inventors: 林新忠
Original assignee: Zhejiang Jinbo Electron Co Ltd
Current assignee: Zhejiang Jinbo Electron Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-06-19
Anticipated expiration: 2029-10-29

Abstract

The utility model relates to a vehicle-mounted directional DTMB television antenna, which comprises a mounting seat fixed on the outer wall of the roof, a positioning seat fixed on the inner wall of the roof and assembled with a display device, and a supporting shaft rotatably arranged in the mounting seat and the positioning seat, wherein the upper end of the supporting shaft penetrates out of the mounting seat and is fixed with the DTMB antenna; the lower end of the supporting shaft penetrates to the outside of the positioning seat and is fixedly provided with a knob, and a locking assembly for limiting the rotation of the knob and a switch for controlling the locking assembly to be opened and closed are arranged between the knob and the positioning seat; a signal comparison unit is arranged in the knob and controls the display device to adjust the display state after comparing the strength of the signal from the DTMB antenna. The utility model discloses a DTMB antenna is adjusted to the star direction to the knob to assist the signal intensity that signal comparison unit calculated the DTMB antenna, be favorable to more accurate adjustment DTMB antenna direction, make the job stabilization nature and the fault rate of directional DTMB antenna all improve, guarantee the reliability of communication.

Description

Vehicle-mounted directional DTMB television antenna

Technical Field

The utility model belongs to the technical field of car antenna's technique and specifically relates to a vehicle-mounted directional DTMB television antenna is related to.

Background

A directional antenna is an antenna that emits and receives electromagnetic waves in one or more specific directions with a high intensity, and emits and receives electromagnetic waves in other directions with a null or minimum intensity. In recent years, with the rapid development of communication technology, the market demands for vehicle-mounted directional DTMB television antennas are increasing.

The vehicle-mounted directional DTMB television antenna on the market at the present stage is generally a common antenna, and mainly adopts a manual mode and an automatic mode, and the automatic positioning adopts a single-point positioning principle. Therefore, the antenna is not aligned to the satellite in actual operation, which causes unstable communication.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to the above-mentioned not enough that exists among the prior art and provide an on-vehicle directional DTMB television antenna convenient to adjust directional aerial orientation, it has solved current directional aerial to the problem that the star is inaccurate, the communication is unstable.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a vehicle-mounted directional DTMB television antenna comprises a mounting seat fixed on the outer wall of a vehicle roof, a positioning seat fixed on the inner wall of the vehicle roof and assembled with a display device, and a support shaft rotatably mounted in the mounting seat and the positioning seat, wherein the upper end of the support shaft penetrates out of the mounting seat and is fixed with the DTMB antenna; the lower end of the supporting shaft penetrates to the outside of the positioning seat and is fixedly provided with a knob, and a locking assembly for limiting the rotation of the knob and a switch for controlling the opening and closing of the locking assembly are arranged between the knob and the positioning seat; and a signal comparison unit is arranged in the knob, and the signal comparison unit compares the strength of the signal from the DTMB antenna and controls the display device to adjust the display state.

By adopting the technical scheme, the transmission line of the DTMB antenna penetrates through the roof and then is connected with the signal comparison unit, when the DTMB antenna is not aligned with the star, the locking assembly is controlled to unlock through the switch, the knob is rotated to drive the DTMB antenna to rotate and find a better signal receiving direction, the signal comparison unit receives an analog signal of the DTMB antenna and compares the intensity of the analog signal, then the signal comparison unit converts an operation result into an electric signal and transmits the electric signal to the display device, and the display device displays the intensity of the signal, so that a user can conveniently select whether to continue to rotate the knob; after the DTMB antenna direction adjustment is finished, the locking component is controlled to be locked through the switch, and the knob is limited to rotate; the satellite alignment direction of the DTMB antenna can be calculated more correctly through the signal comparison unit, the DTMB antenna direction can be adjusted more accurately, the working stability and the error rate of the directional DTMB antenna can be improved, and the reliability of communication is guaranteed.

The utility model discloses further set up to: the signal comparison unit comprises a 4-bit operational comparator electrically connected to the DTMB antenna and an operational amplifier electrically connected to the display device and the operational comparator.

By adopting the technical scheme, the analog signal of the DTMB antenna is received through the operational comparator, the strength of the analog signal is compared, and then the comparison result of the operational comparator is amplified through the operational amplifier, so that the signal comparison precision of the signal comparison unit is improved.

The utility model discloses further set up to: the locking assembly comprises a gear ring arranged on the positioning seat and a tooth part arranged on the switch and meshed with the gear ring, and the switch is arranged on the knob and used for driving the tooth part to be separated from the gear ring.

By adopting the technical scheme, when the locking assembly is locked, the knob is limited to rotate relative to the positioning seat by meshing the gear ring and the tooth part; when the locking assembly is unlocked, the tooth part is driven to be separated from the gear ring through the switch, the knob can rotate relative to the positioning seat, and the operation is simple, easy and quick.

The utility model discloses further set up to: a sliding cavity is formed in the knob and penetrates through the knob along the radial direction of the gear ring; the switch is in sliding scarf joint with the opening of the sliding cavity.

Through adopting above-mentioned technical scheme, utilize the chamber of sliding to provide the space for the sliding of switch to utilize the chamber opening limit switch's that slides slip direction, the tooth portion after being convenient for remove can dock with the ring gear once more.

The utility model discloses further set up to: an elastic piece is arranged in the sliding cavity, one end of the elastic piece is fixed on the knob, the other end of the elastic piece is fixed on the switch, and the tooth part is forced to move towards the gear ring.

By adopting the technical scheme, the elastic piece is utilized to pre-tighten, when no external force is applied to the switch, the elastic piece can force the knob to move, so that the tooth part is meshed with the gear ring, and the locking assembly is automatically locked.

The utility model discloses further set up to: the outer wall of the switch is provided with a plurality of first concave surfaces, and the knob is provided with a plurality of second concave surfaces.

Through adopting above-mentioned technical scheme, the person of being convenient for snatchs the application of force.

To sum up, the utility model discloses a beneficial technological effect does: the satellite alignment direction of the DTMB antenna is adjusted through the knob, the signal comparison unit is used for calculating the signal strength of the DTMB antenna, the DTMB antenna direction can be adjusted more accurately, the working stability and the error rate of the directional DTMB antenna are improved, and the reliability of communication is guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of the vehicle-mounted directional DTMB tv antenna of the present invention.

Fig. 2 is a schematic view of the connection relationship among the positioning seat, the knob and the supporting shaft of the present invention.

Fig. 3 is a schematic diagram of the connection relationship among the knob, the switch and the signal comparison unit according to the present invention.

Fig. 4 is a schematic structural diagram of the positioning seat of the present invention.

Fig. 5 is a schematic view of the connection relationship among the positioning seat, the knob, the switch and the locking assembly of the present invention.

In the figure, 1, a mounting seat; 2. positioning seats; 3. a support shaft; 31. an inner fulcrum; 32. an outer support shaft; 4. a signal comparison unit; 41. an operational comparator; 42. an operational amplifier; 5. a display device; 51. an indicator light; 6. a knob; 61. a second concave surface; 62. a sliding cavity; 7. a locking assembly; 71. a ring gear; 72. a tooth portion; 8. a switch; 81. a first concave surface; 82. an elastic member; 9. a DTMB antenna.

Detailed Description

In order to make the utility model realize that technical means, creation characteristics, achievement purpose and effect are clearer and easily understand, it is right to combine below the figure and the detailed implementation mode the utility model discloses do further explanation:

referring to fig. 1 and 3, for the utility model discloses an on-vehicle directional DTMB television antenna for be fixed in mount pad 1 of roof, be used for being fixed in vehicle inner wall's positioning seat 2, install in mount pad 1 and positioning seat 2 with rotatable mode and hollow back shaft 3. The upper end of back shaft 3 is worn out to the outside of mount pad 1, and is fixed with DTMB antenna 9, and the lower extreme of back shaft 3 is worn to the outside of positioning seat 2, and is fixed with knob 6. The DTMB antenna 9 is driven to rotate by the knob 6 to search a better signal receiving direction. In order to improve the adjustment accuracy of the knob 6, a signal comparison unit 4 is arranged in the knob 6, and a display device 5 is arranged on the positioning seat 2. The display device 5 includes four indicator lamps 51, and the signal comparison unit 4 includes a 4-bit operational comparator 41 electrically connected to the DTMB antenna 9, and an operational amplifier 42 electrically connected to the indicator lamps 51 and the operational comparator 41.

Referring to fig. 2, the support shaft 3 includes an inner support shaft 31 fixed to the DTMB antenna 9 and an outer support shaft 32 fixed to the knob 6 and fitted over the inner support shaft 31. The inner support shaft 31 and the outer support shaft 32 each have a cavity extending in the longitudinal direction and an opening communicating with the cavity on the surface. Referring to fig. 1 to 4, a transmission line (not shown) of the DTMB antenna 9 is connected to the operation comparator 41 through the inner fulcrum 31 and the cavity of the outer fulcrum 32; one end of the transmission line (not shown) of the operational amplifier 42 passes through the cavity and the opening of the outer support shaft 32 and the outer support shaft 32 to the outside of the outer support shaft 32 and passes through the positioning base 2 to connect with the indicator lamp 51. The operational comparator 41 receives the analog signal of the DTMB antenna 9, compares the intensity of the analog signal, and then amplifies the comparison result of the operational comparator 41 by the operational amplifier 42. Then the signal comparison unit 4 converts the operation result into an electric signal and transmits the electric signal to the display device 5, the display device 5 lights up the indicator lamp 51 according to the electric signal, and a user can know the signal intensity of the DTMB antenna 9 according to the number of the lighted lamps.

Referring to fig. 3, a locking assembly 7 for limiting rotation of the knob 6 and a switch 8 for controlling opening and closing of the locking assembly 7 are disposed between the knob 6 and the positioning seat 2. The outer wall of the switch 8 is provided with a plurality of first concave surfaces 81, and the surface of the knob 6 opposite to the switch 8 is provided with a second concave surface 61.

Referring to fig. 4 and 5, the locking assembly 7 includes a gear ring 71 disposed on the positioning socket 2, and a toothed portion 72 disposed on the switch 8 and engaged with the gear ring 71, and the switch 8 is disposed on the knob 6 for urging the toothed portion 72 to disengage from the gear ring 71. A sliding cavity 62 is formed in the knob 6, and the sliding cavity 62 penetrates through the knob 6 along the radial direction of the gear ring 71. The switch 8 is a push member slidably engaged in an opening of the slide chamber 62. An elastic part 82 is arranged in the sliding cavity 62, and the elastic part 82 is a compression spring. The elastic element 82, fixed at one end to the knob 6 and at the other end to the switch 8, forces the tooth 72 towards the toothing 71. When the locking assembly 7 is unlocked, the switch 8 drives the tooth part 72 to be separated from the gear ring 71, and the knob 6 can rotate relative to the positioning seat 2. When the locking assembly 7 is locked, the switch 8 is released, the elastic member 82 forces the toothed portion 72 to move towards the toothed ring 71, and the rotation of the knob 6 relative to the positioning socket 2 is limited by the engagement of the toothed ring 71 and the toothed portion 72.

The implementation principle of the embodiment is as follows: when the DTMB antenna 9 is not aligned with the star, the locking component 7 is controlled to unlock through the switch 8, the knob 6 is rotated to drive the DTMB antenna 9 to rotate and find a better signal receiving direction, the signal comparison unit 4 receives an analog signal of the DTMB antenna 9 at the moment and compares the intensity of the analog signal, then the signal comparison unit 4 converts an operation result into an electric signal and transmits the electric signal to the display device 5, and the display device 5 displays the intensity of the signal, so that a user can conveniently select whether to continue to rotate the knob 6; the DTMB antenna 9 direction adjustment is finished, the locking assembly 7 is controlled to be locked through the switch 8, and the knob 6 is limited to rotate.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A vehicle-mounted directional DTMB television antenna is characterized in that: the display device comprises an installation seat (1) fixed on the outer wall of the car roof, a positioning seat (2) fixed on the inner wall of the car roof and assembled with a display device (5), and a support shaft (3) rotatably installed in the installation seat (1) and the positioning seat (2), wherein the upper end of the support shaft (3) penetrates out of the installation seat (1) and is fixed with a DTMB antenna (9); the lower end of the supporting shaft (3) penetrates to the outside of the positioning seat (2) and is fixedly provided with a knob (6), and a locking component (7) for limiting the knob (6) to rotate and a switch (8) for controlling the locking component (7) to be opened and closed are arranged between the knob (6) and the positioning seat (2); and a signal comparison unit (4) is arranged in the knob (6), and the signal comparison unit (4) compares the strength of the signal from the DTMB antenna (9) and controls the display device (5) to adjust the display state.

2. The vehicle-mounted directional DTMB television antenna of claim 1, further comprising: the signal comparison unit (4) comprises a 4-bit operational comparator (41) electrically connected to the DTMB antenna (9), and an operational amplifier (42) electrically connected to the display device (5) and the operational comparator (41).

3. The vehicle-mounted directional DTMB television antenna of claim 1, further comprising: the support shaft (3) comprises an inner support shaft (31) fixed on the DTMB antenna (9) and an outer support shaft (32) fixed on the knob (6) and sleeved outside the inner support shaft (31).

4. The vehicle-mounted directional DTMB television antenna of claim 1, further comprising: the locking assembly (7) comprises a gear ring (71) arranged on the positioning seat (2) and a tooth part (72) arranged on the switch (8) and meshed with the gear ring (71), and the switch (8) is arranged on the knob (6) and used for driving the tooth part (72) to be separated from the gear ring (71).

5. The vehicle-mounted directional DTMB television antenna of claim 4, further comprising: a sliding cavity (62) is formed in the knob (6), and the sliding cavity (62) penetrates through the knob (6) along the radial direction of the gear ring (71); the switch (8) is in sliding scarf joint with the opening of the sliding cavity (62).

6. The vehicle-mounted directional DTMB television antenna of claim 5, further comprising: an elastic piece (82) is arranged in the sliding cavity (62), one end of the elastic piece (82) is fixed on the knob (6), the other end of the elastic piece is fixed on the switch (8), and the tooth part (72) is forced to move towards the gear ring (71).

7. The vehicle-mounted directional DTMB television antenna of claim 5, further comprising: the outer wall of the switch (8) is provided with a plurality of first concave surfaces (81), and the knob (6) is provided with a plurality of second concave surfaces (61).