KR100420004B1 - Mode change device and method of vcr - Google Patents

Abstract

The present invention relates to an apparatus and a method for mode conversion of VR.

According to an aspect of the present invention, there is provided a mode conversion apparatus for interlocking with a cam gear and sensing a set mode and outputting a detection signal to a control unit, the cam gear including a plurality of protrusions protruding outward from a lower outer periphery except a gear tooth; A switching unit consisting of a connection terminal which maintains a predetermined interval and maintains elasticity so as to be in contact with the protrusion, and a sensing terminal having one end contacted with the connection terminal and the other end fixed to the main base; Characterized in that provided. Therefore, there is an effect of minimizing contact failure and diversifying the product design by using the mode conversion device configured only by on / off operation without using a mode switch which is expensive and has a large contact failure.

Description

Mode change device and method of V-CAL {MODE CHANGE DEVICE AND METHOD OF VCR}

The present invention relates to a mode of the BC-AL mode conversion apparatus, and more particularly, the V-Cal for detecting the position of each mode by the rotation of the cam gear to provide the driving force of the various brake devices at the same time loading the cassette tape It relates to a mode conversion device and method of.

In general, V-RA is a device for recording video and audio signals on a magnetic recording tape or reproducing a recorded signal, and has a tape traveling system for moving a tape along a predetermined path on a main base. The tape traveling system is connected from the supply reel to the winding reel via the full width erasing head, the head drum and the audio control head, and the tape is compressed between the capstan shaft and the pinch roller to travel at a constant speed in the forward and reverse directions according to the rotation direction of the capstan shaft. do.

This V-drive is selectively driven according to various mode states such as EJECT, REVIEW, PLAY / STOP, SLOW, FF / REW tape cassette loading and unloading, and the mode switch detects the current mode state. By providing to the controller, the controller always knows the current mode status, and can switch between modes quickly when another mode is selected.

Figure 1 is a plan view showing the configuration of the driving mechanism of the general V-al, Figure 2 is an exploded perspective view showing the mode switch as described above, the mode switch 10 is a cam gear 12 that is rotated by the LC motor (12) ) And a stator 14 fixed to a fixture on the main base 1. The stator 14 includes a plurality of pattern lines having different rotation radii, and the pattern lines are formed with patterns 16 having predetermined lengths spaced at predetermined intervals in the circumferential direction. It is electrically connected to the terminal 18 and electrically connected to the control unit (not shown).

In addition, the rotor 13 is provided with a brush 20 electrically connected to the pattern 16. The brush 20 has the same number of brush pieces 22 as the pattern lines, and the brush pieces 22 ) Is radially disposed so that its end does not contact or come into contact with the pattern 16 of the stator 14 according to the rotational angle of the rotor 13 to detect a specific signal according to the rotational angle of the rotor 13. It is supposed to be.

Therefore, when the LC motor 2 is driven and the cam gear 12 is rotated by a predetermined angle during the driving of a specific mode, the brush piece 22 and the pattern of the brush 20 are rotated at a predetermined angle by the rotor 13. 16) all or some of the touches detect a specific signal for a specific mode, and by providing it to the controller, the controller recognizes the current specific mode, and the controller selects another mode in the current mode. It is to make the mode change quickly.

However, in the conventional mode switch as described above, since the brush 20 of the rotor 13 and the pattern 16 of the stator 14 contact each other in the transition of each mode, the wear of the pattern 16 is severe due to these frictions. When it is used for a long period of time, contact failure may be caused. As a result, the control unit may not recognize the current mode state accurately, and thus mode switching may not be performed quickly or a malfunction may occur.

In addition, the present mode switch has a complicated mold structure and a large number of patterns, which hinders design freedom, and increases the cost of products due to the high cost of parts.

Therefore, the present invention is to solve such a conventional problem, by using a mode conversion device of the mechanism that operates only on / off by the rotation of the cam gear can replace the expensive mode switch, malfunction occurs due to poor contact An object of the present invention is to provide a mode conversion device and method of VCA to prevent the.

The present invention for realizing the above object, in the mode conversion device for interlocking with the cam gear to detect the set mode and outputs the detection signal to the control unit, comprising a plurality of protrusions protruding outward on the lower outer periphery except the gear teeth Cam gear; A switching unit consisting of a connection terminal which maintains a predetermined interval and maintains elasticity so as to be in contact with the protrusion, and a sensing terminal having one end contacted with the connection terminal and the other end fixed to the main base; Provided is a mode conversion device of VCC characterized in that it is provided.

In addition, the present invention provides a method for controlling an operation mode in a V-CRT in which transition time data between respective preset modes is tabulated, and when the initial switching signal is input to the V-CAL, the input switching signal is stopped or played. Determining whether it is a switching signal for mode setting; As a result of the determination in the first step, if the input switching signal is a switching signal for setting a stop or play mode, the switching signal is referred to as a reference signal (T1). Setting a second step; Determining whether the switching signal is input again after a predetermined time elapses; A fourth step of, if the switching signal is input again, setting the re-input switching signal as a mode transition signal (T2) and calculating a delay time (T2-T1) between the mode transition signal and the reference signal; A fifth step of comparing the delay time data calculated in the fourth step with the transition time data between the modes; A sixth step of determining, as a driving mode, a mode corresponding to the data value when there is a data value coincident with each other as a result of the comparison in the fifth step; And a seventh step of performing the driving mode.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

1 is a plan view showing the configuration of a drive mechanism of a typical V-Cal;

2 is an exploded perspective view showing the configuration of a conventional mode switch V

3 is a perspective view of a mode conversion device of V-Cal according to the present invention;

Figure 4 is a block diagram showing the configuration of the mode conversion method of VCC according to the present invention,

Figure 5 is a flow chart for performing a mode conversion method of VCC according to the present invention.

<Description of the symbols for the main parts of the drawings>

30: main base 40: cam gear

42, 44: protrusion 50: switching unit

52: connection terminal 54: detection terminal

60: memory 70: control

80: drive unit

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

Figure 3 is a perspective view of the mode conversion device of the V-Cal according to the present invention, Figure 4 is a block diagram showing the configuration of the mode conversion method of the V-Cal according to the present invention, Figure 5 is a mode conversion of the V-Cal according to the present invention A flowchart for carrying out the method.

As shown in Fig. 3, the mode conversion apparatus of V-Cal according to the present invention comprises a cam gear 40 and a switching unit 50.

Here, the cam gear 40 is provided with protrusions 42 and 44 protruding outward from the lower outer periphery except for the portion where the gear teeth are formed with a predetermined distance from each other. That is, the projection part 42 which performs the EJECT mode is provided, and the projection part 44 which performs the PLAY / STOP mode at the predetermined distance along the circumferential surface from this projection part 42 is provided.

In another embodiment, although not shown, the protrusions 42 and 44 may be installed in a range in which the protrusions 42 and 44 do not interfere with the upper cam 46 of the trajectory formed on the upper surface of the cam gear 40. Further, the projections 42 and 44 are provided on the lower surface of the cam gear 40 at portions other than the trajectory of the lower cam (not shown).

In addition, the switching unit 50 is fixedly installed on the main base 30 or a separate bracket, and maintains a predetermined interval and elasticity so as to be in contact with the protrusions 42 and 44, and at one end of the main base electrically. The connection terminal 52 fixed to the 30 is provided.

In addition, one end is in contact with the connection terminal 52 and the other end is composed of a sensing terminal 54 fixed to the main base 30.

At this time, Figure 4 is a block diagram showing the configuration of the mode conversion method V V according to the present invention, the transition time between the modes of the key signal pressed by the user to the table (table), the load current value at the time of mode transition A controller 70 for providing a control signal of the switching unit 50 corresponding to the key signal, and a driver 80 driven according to a signal provided from the controller 70. Include.

The connection terminal 52 of the switching unit 50 is in close contact with the protrusion 42, and the close connection terminal 52 is in contact with the sensing terminal 54 to maintain an on state.

When the user inserts the video cassette tape to a predetermined position of the cassette holder in the ON state, that is, in the EJECT mode, and pushes it for a predetermined distance, the cam unit 40 rotates through a certain driving system, and the switching unit 50 is rotated. It is turned on and off, which is immediately recognized by the control unit 70 and drives the LC motor to load the video cassette tape.

The tape is drawn out while the video cassette tape is loaded, and the controller 70 recognizes the on position of the switching unit 50 selected in the PLAY / STOP mode to drive the driving unit 80.

At this time, the other mode is driven using the PLAY / STOP mode as the reference mode.

Hereinafter, with reference to the above-described configuration, with reference to the flowchart of Figure 5 attached to the mode conversion process of VCC according to a preferred embodiment of the present invention will be described in detail.

Prior to the description, this process is based on the premise that the transition time data between modes and the load current value at the time of mode transition are stored in the memory 60 in the form of a table.

First, in step S200, the controller 70 checks a signal according to a switching signal input, and proceeds to step S202 to determine whether the switching signal to which the signal is input is a PLAY / STOP mode. Determine the cognition.

When the input switching signal is a switching signal for setting the PLAY / STOP mode, the controller 70 proceeds to step S204 and sets the switching signal as the reference signal T1. .

Thereafter, in step S206, the time count is started from the setting point of the reference signal T1. That is, the control unit 70 according to the present invention is provided with a timer (not shown) to check the time data that proceeds from the point of time when the reference signal T1 is set.

At this time, in step S208, the control unit 70 determines whether to re-enter the switching signal.

If the switching signal is re-input, the controller 70 sets the re-inputted switching signal as the mode transition signal T2, and proceeds to step S210 to delay time T2 between the mode transition signal and the reference signal. -T1) is calculated.

After performing step S210, in step S212, the delay time data calculated in step S210 and the transition time data between the modes are compared and the process proceeds to step S214.

In step S214, the control unit 70 determines whether a data value coinciding with the calculated delay time data exists in the memory 60, and if the matching data value exists in the memory 60, proceeds to step S216. Proceeding, the mode corresponding to the data value is determined as the drive mode, for example, the "REW" mode.

Therefore, in step S218, the driving mode thus determined is performed as the setting mode. The mode execution process is implemented by the driving of the driving unit 80 described above, and those skilled in the art can easily know, and a detailed description thereof will be omitted.

On the other hand, the present process compares the current value detected in the VRC with the current value preset in the above-described memory 60, and sets the emergency mode when the detected current value exceeds the preset current value. Additional implementations may be possible. This process is for a more stable V-Cal drive.

Thus, by driving the mechanism of V-Cal, the mode switching device and the method which are made only on / off without using the mode switch used in the related art can reduce cost and defects.

In the above description, it should be noted that those skilled in the present invention can only make modifications and changes to the present invention without changing the gist of the present invention as it merely illustrates a preferred embodiment of the present invention.

As described above, the VLC mode converting apparatus and method according to the present invention do not use a mode switch that is expensive and has a bad contact when driving the VRL mechanism. This minimizes contact defects and makes it possible to diversify product designs.

Claims (5)

In the mode of V-Cal, A memory section that tabulates transition times between modes, and load current values are tabulated at the time of mode transition; A control unit providing a control signal of a switching unit corresponding to a key signal pressed by a user; A driving unit driven according to a signal provided from the control unit; A cam gear including an eject mode execution projection and a play / stop mode execution projection each projecting outwardly at a predetermined interval on the lower outer periphery except for the gear teeth; A switching unit comprising a connection terminal which maintains a predetermined interval and maintains elasticity so as to be in contact with each of the protrusions, and a sensing terminal having one end contacted with the connection terminal and the other end fixed to the main base; Prepared, When the play / stop mode setting switching signal is input from the switching unit by the rotation of the cam gear, the control unit sets the switching signal as the reference signal T1, When the switching signal is re-entered from the switching unit, the control unit sets the re-inputted switching signal as a mode transition signal T2, calculates a delay time T2-T1 between the mode transition signal and the reference signal, If a data value coinciding with the calculated delay time data exists in the memory, the controller determines a mode corresponding to the data value as a driving mode, and drives the driving unit to perform the determined driving mode as a setting mode. The mode conversion device of V-C characterized in that the control. The method of claim 1, The cam gear is a mode conversion device of V-C, characterized in that the plurality of protrusions protrude upwardly in contact with the switching unit. The method of claim 1, The cam gear has a plurality of protrusions protruding downward from the lower surface thereof to be in contact with the switching unit. In the method of controlling the operation mode in VRC in which the transition time data between preset modes is tabulated, Determining whether the input switching signal is a switching signal for setting a stop or play mode when the initial switching signal is input to the BC-C; As a result of the determination in the first step, if the input switching signal is a switching signal for setting a stop or play mode, the switching signal is referred to as a reference signal (T1). Setting a second step; Determining whether the switching signal is input again after a predetermined time elapses; A fourth step of, if the switching signal is input again, setting the re-input switching signal as a mode transition signal (T2) and calculating a delay time (T2-T1) between the mode transition signal and the reference signal; A fifth step of comparing the delay time data calculated in the fourth step with the transition time data between the modes; A sixth step of determining, as a driving mode, a mode corresponding to the data value when there is a data value coincident with each other as a result of the comparison in the fifth step; A seventh step of performing the driving mode; The predetermined load current value is preset in the VLC, and the emergency mode is set when the detected current value exceeds the preset current value by comparing the current value detected in the VLC with the preset current value. Mode conversion method of V-CAL comprising a. delete