JPH0418309Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an adjustment signal transmission device that is applied, for example, to adjustment during the manufacturing stage of a television set.

[Summary of the idea]

For example, in a transmission device for adjustment signals for various adjustments in the manufacturing stage of a television set, this invention consists of a transmitting antenna installed on one side of the pallet and a position close to the pallet in the conveyance path, and a transmitting antenna installed on the other side. This system has a receiving antenna that is connected to the receiver antenna, and is capable of transmitting adjustment signals wirelessly, thereby allowing various adjustments to be made to the television set.

[Conventional technology]

Conventionally, predetermined tests have been carried out at the manufacturing stage of television sets to make various adjustments and to check various operations. For example, various test patterns are projected on a cathode ray tube to inspect and adjust various items such as landing and white balance. At this time, it is necessary to supply an RF signal to the television set under test from outside the conveyance path, such as a belt conveyor. As a transmission method for this RF signal, a connector is connected to supply a predetermined signal to a television set.

[Problem that the invention attempts to solve]

However, if a belt conveyor is used to carry out the prescribed test while loading the television sets to be tested on a pallet or the like and transporting them sequentially along a line, it is necessary to start and end the adjustment for each television set. The disadvantage was that the connectors had to be attached and detached from time to time, making adjustment work time-consuming.

[Means for solving problems]

This invention consists of a pallet 3, a conveyance path 2 for conveying the pallet 3, a transmitting antenna 24 provided on one side of the pallet 3 and a position close to the pallet in the conveying path 2, and a receiving antenna 2 provided on the other side.
5, and is capable of transmitting adjustment signals between the device 1 loaded on the pallet and the outside.

[Effect]

In this idea, one of the transmitting antenna and the receiving antenna is installed on the side of the pallet loaded with the equipment to be adjusted, and the other is installed in a position close to the pallet on the transport path, so that the adjustment signal is an RF signal itself. Wireless transmission becomes possible.

〔Example〕

Hereinafter, with reference to FIGS. 1, 2, and 3,
An embodiment of this proposed adjustment signal transmission device will be described.

In FIG. 1, reference numeral 1 indicates a television set undergoing a predetermined test. 4 and 5 are for transporting pallet 3,
The rollers that rotate in a predetermined direction while supporting the lower surface of the pallet 3 are shown. These rollers 4 and 5
are rotatably supported by chains 4a and 5a. These rollers 4 and 5 are configured to roll inside guide rails provided at predetermined positions on both sides of the conveying device 2.
These rollers 4 and 5 are provided at predetermined intervals on guide rails provided in parallel, so that the pallet can be smoothly moved in a predetermined section.

Each of 6 and 7 is a energizing drum device, and when the energizing brush provided on the circumferential surface of each of these drum devices 6 and 7 comes into contact with the strip-shaped conductor provided on the bottom surface of the pallet 3, the television is turned on. Adjustment power is supplied to set 1.

Reference numeral 8 indicates a rod for stopping the pallet 3 at the adjustment work position, and this rod 8 is moved up and down by an air cylinder 9 provided at its lower part. That is, when the pallet 3 reaches the working position, the upper end of the rod 8 rises to the position of the pallet 3, and the pallet 3 is prevented from moving. When the adjustment work is completed at the working position, the rod 8 is lowered and the pallet 3 is transferred to the next working position for adjustment, etc.

A receiving antenna provided in a shield case 11 is disposed on the side of the pallet 3. The receiving antenna has a structure in which a receiving antenna coil 25 is wound around a bobbin 10, as shown in FIG. The received signal from the receiving antenna coil 25 is transmitted via a coaxial cable to the connector 12, which is coupled to the RF input terminal of the television set 1. The opening surface of the shield case 11 is directed toward the outside of the pallet 3.

Furthermore, frames are provided along both sides of the transport device 2. A transmitting antenna is provided on one frame facing the above-mentioned receiving antenna.
This transmitting antenna is connected to pallet 3 by rod 8.
The antenna is located opposite the receiving antenna when the antenna stops. Like the receiving antenna, the transmitting antenna has a transmitting antenna coil 24 wound around a bobbin 13, and is housed in a shield case 14. An RF adjustment signal is supplied to the transmitting antenna coil 24 via a coaxial cable 16 from a circuit box 15 housing an RF amplifier and the like. Although not shown, a connector is attached to the circuit box 15 via a coaxial cable. The bobbin 10 and the bobbin 13 are coaxially opposed to each other,
Electromagnetic waves from the transmitting antenna coil 24 interlink with the receiving antenna coil 25.

As an example, the diameter of bobbin 10 and bobbin 13 is 2.5 cm, and the number of turns of each of transmitting antenna coil 24 and receiving antenna coil 25 is
It is said to take 2.5 to 3 turns. The bobbin 10 and the bobbin 13 are arranged as close to each other as possible with a facing interval of 1 cm to 3 cm.

In the case of television sets, various adjustments are required such as landing, white balance, deflection system, etc., and each adjustment is made at a different working position. Also,
The multiple adjustment signals required for each adjustment are VHF
It has different carrier air frequencies in the band and UHF band. For example, the first channel adjustment signal is a dot pattern signal, and the second channel adjustment signal is a crosshatch pattern signal. Therefore, the received conditioning signal can be supplied from the antenna input terminal of the television set.

FIG. 3 is a circuit diagram showing the transmission and reception of signals during a test of the television set 1. In this FIG.
The signal from this matching attenuator 22 is supplied to a 7.5Ω matching resistor 23,
The output signal of the matching resistor 23 is supplied to the transmitting antenna coil 24, and the transmitting antenna coil 24 outputs an RF signal. On the other hand, the receiving antenna coil 25 wound around the bobbin 10 receives this RF signal, and the signal is supplied to a matching attenuator 27 via a 75Ω resistor 26, and an output signal is output from this matching attenuator 22. terminal 28
The signal is output as an RF signal and supplied to the television set 1.

Although this embodiment has been described in which the invention is applied to an example of testing the television set 1, it can also be applied to adjusting a magnetic recording/reproducing device instead of the television set 1. The magnetic recording/reproducing device is placed on a pallet, with the pallet 3 side serving as the RF signal transmitting side, and the side near the pallet on the transport path serving as the RF signal receiving side. Then, the playback state of the VTR can be adjusted by checking the playback state of the VTR using an external monitor device or the like.

[Effect of idea]

According to this invention, since the adjustment RF signal is transmitted using the transmitting/receiving antenna, there is an advantage that the adjustment signal can be transmitted and received without connecting an RF transmission cable. Furthermore, since such a transmission system is not mechanically connected, it does not require much precision in positioning the transmitting and receiving devices. Furthermore, since the transmission is conducted without contact, there is no risk of problems such as poor contact compared to cases where a connector or the like is used.

In addition, since a coil is used, there is no need for a large antenna, and a matching attenuator and impedance matching resistor are provided between the RF signal input/output terminal and the transmitting/receiving coil. Can be transmitted with low loss.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing an embodiment of this invention, Fig. 2 is a perspective view showing a receiving antenna of an embodiment of this invention, and Fig. 3 shows a signal transmission system of an embodiment of this invention. It is a wiring diagram. Explanation of main symbols in the drawings: 1... Television set, 2... Conveying device, 3... Pallet, 4, 5... Roller, 8... Rod, 24...
Transmission antenna coil, 25...Reception antenna coil.

Claims (1)

[Scope of utility model registration request] A pallet, a conveyance path for conveying the pallet,
It has a transmitting antenna installed on either the pallet and a position close to the pallet on the conveyance path, and a receiving antenna installed on the other side, and is used for adjustment between the equipment loaded on the pallet and the outside. An adjustment signal transmission device characterized by being capable of transmitting signals.