KR0183603B1 - A fixing jig for testing deck of the head drum - Google Patents

Abstract

The present invention is to reduce the vibration generated in the deck 170 during the inspection to prevent the bending, by making the base for supporting the deck 170 to the metal and to secure the deck 170.

The present invention is a plurality of fixed shaft 120 for supporting the deck 170 from the bottom, a plurality of fixed brackets 130 for fixing the deck 170 from the side, and the fixed shaft 120 and the fixed bracket It consists of a horizontal main plate 110 for installing and supporting the 130 on the bottom.

In the present invention, since the vibration of the deck 170 is absorbed by the fixing jig, noise does not occur in the output device, so that accurate inspection can be performed. In addition, since the fixing jig is made of metal and is not bent, the installation state of the deck 170 is stabilized and the life of the fixing jig is lengthened.

Description

Head Drum Inspection Deck Fixtures

The present invention relates to a fixing jig for fixing an inspection deck for mounting a head drum assembly, and in particular, by fixing the deck to a metal jig to fix the head drum in a good state to obtain an accurate inspection result. It is about.

In general, the head drum assembly is a device installed in the traveling system of V-Cal to drive the video tape to its outer peripheral surface, thereby reproducing the video and audio signals recorded on the video tape or recording the input video and audio signals on the video tape. .

As shown in FIG. 1, the head drum assembly includes an upper drum 10, a lower drum 20, and a drum motor 50. The drum motor is formed by a shaft 30 installed through a central portion of the drum. The driving force of 50 is transmitted to the upper drum 10. Among them, a plurality of heads 12 are installed on the bottom of the upper drum 10 so as to protrude to the outer circumferential surface, and a rotary transformer rotor 40 electrically connected to the heads 12 is fixedly installed below the center. In addition, the lower drum 20 forms a constant gap with the rotary transformer rotor 40, and a rotary transformer stator 42 is installed, and the flexible PC 48 is electrically connected to the rotary transformer stator 42. It is connected to a preamp that amplifies the current.

The upper drum 10 of the head drum assembly having such a configuration is fixed to the shaft 30 so that the drum 12 rotates together with the shaft 30 when the drum motor 50 is driven, and the head 12 is the upper drum 10. The magnetic force line generated from the magnetic tape in contact with the outer circumferential surface of the () is transferred to the rotary transformer rotor 40 to transmit a magnetic signal, or the electrical signal transmitted from the rotary transformer rotor 40 to the leakage magnetic field from the head 12. Magnetize magnetic tape by making

The rotary transformer rotor 40 transmits an electrical signal to the rotary transformer stator 42 while rotating with a fine gap with the rotary transformer stator 42 installed in the lower drum 20. The rotary transformer stator 42 then delivers the transmitted signal to the preamplifier via the flexible PC 48 connected thereto. In contrast, the signal transmitted from the preamplifier to the flexible PC 48 is transmitted to the rotary transformer rotor 40 through the rotary transformer stator 42.

On the other hand, the structure of the drum motor 50 for rotating the shaft 30, as shown in Figure 2, the shaft (30) is fitted in the center and the magnet 62 is installed in the inner circumference alternately with the negative pole and the S pole is provided A stator 52 having a rotor 60 and a plurality of main poles 54 having coils wound around an annular iron core, and a pole 56 formed between the main poles 54, and the stator 52. It consists of a PC 51 provided with a connection terminal 57 provided on the bottom surface and connected to a preamplifier and a Hall element 58 for detecting the position and phase of the main electrode 54.

When a power source and an electric signal are transmitted to the PC 51 of the drum motor 50 through the connection terminal 57, and a current is applied to the coil wound around the main electrode 54 of the stator 52, the main electrode 54 at the main electrode 54. The generated magnetic flux is connected with the magnetic flux of the magnet 62 installed in the rotor 60 to generate a rotating magnetic force.

Accordingly, the rotor 60 rotates together with the shaft 30 to rotate the upper drum 10 fixed to the shaft 30.

In addition, the magnet 60 protruding outward is attached to the outside of the rotor 60, and the magnetic sensor 59 capable of detecting the magnetic force of the magnet 64 is installed in the PCB, so that the rotor ( While the 60 is rotating, the magnetic sensor 59 detects the rotation of the rotor 60 and transmits the electrical signal to the microcomputer through the connection terminal 57. Accordingly, the microcomputer calculates the rotational speed of the rotor 60 and transmits a signal to the PCB 51 again when the rotational speed is out of the reference value, thereby adjusting the rotational speed of the drum motor 50 to the reference value.

The drum motor 50 is manufactured and assembled separately to complete a single piece, and then fitted to the head drum assembly by fitting to the shaft 30. The drum base is then joined to the head drum assembly and finally to the BCAL deck.

Before the head drum assembly and the drum base are coupled to the BC-Deck, the quality inspection to determine the abnormality of the function according to the assembly state and the mutual coupling state should be performed to correct the poorly assembled parts.

Figure 3 shows the inspection deck and inspection apparatus commonly used for this quality inspection.

As shown in this figure, the conventional inspection deck includes a tape cassette 86 for testing the function of the head drum, and an installation portion on which the tape cassette 86 is installed on the upper side and on which the drum base 70 is placed. 84 is formed, a base 95 which provides a horizontal plane at the bottom of the deck, and a base 95 provided at the bottom of the base 95 to rotate the tape cassette 86 at the actual V-Cal rotational speed. The drive part 97 is made.

In addition, the inspection apparatus is connected to a connection terminal 90 connected to the flexible PC 48 of the head drum assembly installed on the deck 82 and a connection port 88 connected to the connector 57 of the drum motor 50, and a driving unit connected thereto. 95 is electrically connected. An output device for outputting the function of the head drum assembly is connected to the inspection device.

A method of inspecting the head drum assembly using this inspection apparatus is described below.

First, the head drum assembly in which the drum base 70 is coupled to the mounting portion 84 of the deck 82 is placed, and the magnetic tape of the tape cassette 86 is wound around the tape running surface 22 of the head drum assembly.

In this state, power is supplied to the driving unit 97 by the inspection device so that the tape cassette 86 rotates to the running surface 22. Then, power is applied to the drum motor 50 through the connection port 88 and rotated.

Then, the magnetic signal of the tape guided to the head 12 through the connecting end 90 is reproduced by the inspection device and output to the output device, and the function of the drum motor 50 is also output.

Therefore, the user checks the functions of the drum motor 50 and the head 12 with the output device, and selects and corrects the poorly assembled head drum assembly.

However, the base 95 of the inspection deck was manufactured using a material such as acrylic, and was placed without fixing the deck 82 on the upper side. Therefore, the deck 82 vibrates on the base 95 during the inspection by driving the tape cassette 86 and the drum motor 50. As a result, noise occurs in the output device, and thus the inspection result is not accurate. There was this.

The present invention has been made in order to solve the above problems, the base for supporting the deck made of metal and to be able to fix the deck to reduce the vibration generated on the deck during the inspection, to prevent the head drum It is to provide the fixing jig of the inspection deck.

The present invention for achieving the above object, in the jig for fixing the deck to place the head drum and drum motor, a plurality of fixed shaft for supporting the deck from the bottom, and a plurality of fixed bra for fixing the deck from the side And a horizontal main plate for installing and supporting the ket and the fixed shaft and the fixed bracket at the bottom.

1 is an exploded perspective view of a conventional head drum.

2 is an exploded perspective view of the drum motor.

Figure 3 is a perspective view of a conventional head drum inspection deck.

4 is a perspective view showing a fixing jig according to the present invention.

5 is a perspective view showing an installation state of the fixing jig according to the present invention.

* Explanation of symbols for main parts of the drawings

110: main plate 112: fastening hole

114: fastening bolt 120: fixed shaft

130: fixed bracket 132: lower bracket

134: upper bracket 140: drive unit

150: head drum assembly 152: head drum

154: drum motor 156: head

158: drum base 160: connection port

164: connection 170: deck

172: mounting portion 180: tape cassette

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, preferred embodiments.

The present invention, as shown in Figure 4, a plurality of fixed shaft 120 for supporting the deck 170 from the bottom, a plurality of fixed brackets 130 for fixing the deck 170 from the side, and the fixed It consists of a horizontal main plate 110 for installing and supporting the shaft 120 and the fixed bracket 130 from the bottom.

The fixed shaft 120 is fixed to the deck 170 by a bolt that is formed on the upper surface of the bolt is fitted into the bolt hole.

As shown in FIG. 5, the fixed bracket 130 has a lower bracket 132 that is bolted to the main plate 110, and a bolt that is coupled to a bolt on an upper side of the lower bracket 132. It consists of an upper bracket 134 for pressing and fixing 170. The plurality of upper brackets 134 are each manufactured in a shape that fits the portion of the deck 170 to be fixed.

The main plate 110 is made of a metallic material in order to prevent the bending and the fastening hole 112 is formed in a number of places the drive unit 140 of the bottom surface by the fastening bolt 114 is fitted to the fastening hole 112 Is fixed to. In the present embodiment, the main plate 110 is made of aluminum.

The process of assembling such a fixing jig will be described.

First, a plurality of fixed shafts 120 are installed on the upper surface of the main plate 110 by welding or the like. In addition, a plurality of lower brackets 132 of the fixing bracket 130 are fixed to the main plate 110 with bolts.

Then, the deck 170 is placed on the upper surface of the fixed shaft 120 and the lower bracket 132 and a bolt is fixed to the fixed shaft 120 to fix a portion of the deck 170, and the lower bracket 132 Fasten the upper bracket 134 with a bolt to fix the side of the deck (170).

Next, the main plate 110 having the deck 170 is installed on the upper side of the driving unit 140 in which the fastening hole 112 is formed, and the fastening hole 112 and the driving unit of the main plate 110 are fastened with the fastening bolts 114. The fastening hole 112, the main plate 110 is firmly fixed to the drive unit.

Look at the action of the fixed jig is completed.

The head drum assembly 150 having the drum base 158 coupled to the mounting portion 172 of the deck 170 is placed therein, and the magnetic tape of the tape cassette 180 is wound around the tape running surface of the head drum assembly 150. . Then, the power is applied to the driving unit 1400 by the inspection apparatus so that the tape rotates to the driving surface, and the power is applied to the drum motor 154 through the connector 160 to rotate.

Then, the magnetic signal of the tape guided to the head 156 through the connection end 164 is reproduced by the inspection device and output to the output device, and also the function of the drum motor 154 is also output.

In this case, the fixing jig fixes the deck 170 at which the vibration is generated at the bottom so that the vibration of the deck 170 is not transmitted to the output device. Therefore, the user can accurately check the functions of the drum motor 154 and the head drum 152 with an output device to sort out the poorly assembled drum motor 154 and the head drum 152.

As described above, the present invention is a metal fixing jig for fixing the deck 170 for fixing the head drum assembly 150 at the bottom, absorbing the vibration of the deck 170 in the fixing jig to reduce noise in the output device. Since it does not occur, the head drum assembly 150 may be accurately inspected. In addition, since the fixing jig is made of metal and is not bent, the installation state of the deck 170 is stabilized and the life of the fixing jig is lengthened.

Claims (4)

In the jig for fixing the deck 170 for placing the head drum 152 and drum motor 154, A plurality of fixed shaft 120 for supporting the deck 170 from the bottom, a plurality of fixed brackets 130 for fixing the deck 170 from the side, and the fixed shaft 120 and the fixed bracket ( The head drum inspection deck fixing jig, characterized in that consisting of a horizontal main plate 110 for installing and supporting 130 on the bottom. The head drum inspection deck fixing jig according to claim 1, wherein the fixing shaft (120) has a bolt hole formed on its upper surface to fix the deck (170) by bolts fitted into the bolt hole. According to claim 1, The fixed bracket 130 is a lower bracket 132 is bolted to the main plate 110, and the upper side of the lower bracket 132 is bolted to the deck 170 The head drum inspection deck fixing jig, characterized in that consisting of an upper bracket 134 for pressing and fixing. The method of claim 1, wherein the main plate 110 is made of a metallic material to prevent the bending, the fastening hole 112 is formed in a plurality of places by the fastening bolt 114 is fitted to the fastening hole 112 A head drum inspection deck fixing jig, which is fixed to another object on the bottom.