JP3094246U - Recording / reproducing device using magnetic recording tape - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the time required to return an overrunned tape to an original stop position in an index search in a recording / reproducing apparatus using a magnetic recording tape. SOLUTION: A recording start position signal is detected from a tape 25, and an overrun amount until the running of the tape 25 is stopped is calculated using the number of control signals detected by a calculation unit 18, and the overrun amount is calculated. Compare with a predetermined value. If the overrun amount is equal to or less than the predetermined value, the capstan motor 2 is driven in the reverse direction at a normal reproduction / reverse reproduction rotation speed to return the tape 25 to the recording start position signal detection position. If the amount of overrun exceeds a predetermined value, the capstan motor 2 is driven in the reverse direction at a high predetermined rotation speed to release the tape 2.
5 is returned to a predetermined position, and the capstan motor 2 is driven at a normal reproduction / reverse reproduction rotation speed to return the tape 25 to the detection position of the recording start position signal.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention uses a magnetic recording tape such as a video tape recorder (VTR). Index search in a recording / reproducing apparatus.

[0002]

[Prior art]

  Conventionally, a magnetic recording tape (hereinafter simply referred to as “tape”) is run at high speed. However, the recording start position on the tape is searched and normal playback is performed from the recording start position. A recording / reproducing apparatus using a tape having an index search function is known. .

[0003]   For example, in a VTR that records a video signal and an audio signal on a tape, The audio signal track is near one side and the control signal track is near the other side. As a rack, run the tape between the audio signal track and the control signal track. Video signals are recorded diagonally by one field so that they form a certain angle with respect to the direction Has been done. The video signal has a certain inclination angle with respect to the tape running direction. Recording and playback are performed by the head cylinder that is installed in the And control signals are provided separately from the head cylinder. Recording and reproduction are performed by the signal head.

[0004]   When performing an index search on the VTR, as in the case of fast forward / rewind, The drive force of the motor is directly transmitted to the reel on the winding side, and the reel on the winding side is rotated at a constant speed. While rotating the tape at a speed faster than the normal playback speed, The recording start position signal recorded on the control signal track is detected by the control signal head. To search. Then, when the recording start position signal is searched, the tape running is stopped and Return the tape by the amount of burran and wind the tape around that position on the cylinder head. Turn on and play at normal speed.

[0005]   It should be noted that an index search function in a recording / reproducing apparatus using a magnetic recording tape The following prior art documents are known as related to this.

[0006]   Japanese Patent Application Laid-Open No. 2004-163242 searches for a recording start position signal as the tape traveling speed increases. When there is a large amount of overrun from the time the tape stops running to the overrun, The recorded area may contain another recording start signal. Disables the search for recording start position signals.

[0007]   Patent Document 2 originally has an index search function and a time search function in one switch. The recording / playback device operated with a touch It describes the light.

[0008]   Patent Document 3 discloses two signals of a cue signal and a quasi cue signal for one recording. No. is recorded, and either a cue signal or a quasi cue signal is recorded during index search. When the signal of is detected, the tape running is stopped to reduce the overrun amount. Of.

[0009]

[Patent Document 1]   JP, 2000-57658, A (claim 1).

[Patent Document 2]   Japanese Patent Laid-Open No. 2001-23266 (paragraphs 0002 and 0003)

[Patent Document 3]   JP, 2001-229591, A (paragraph 0009).

[0010]

[Problems to be solved by the device]

  As in the conventional example, the driving force of the motor is directly transmitted to the reel on the winding side, and The diameter of the tape wound on the take-up reel when rotated at a constant rotation speed. The tape running speed is slow while the value is small, and the tape running speed increases as the diameter increases. Line speed becomes faster. That is, the running speed of the tape from the beginning to the end of the tape. Degrees are not constant, slow at first and gradually faster. Therefore, start recording on the tape Depending on the recording position of the position signal, search for the recording start position signal and then run the tape. The amount of overrun before stopping is not constant. Especially, the tape running speed is high As the number of overruns increases, the amount of overrun increases and the variation increases.

[0011]   In the conventional VTR, the recording start signal is recorded from the position where the tape running stops. When returning the tape to the position where The tape was running at a constant speed. Therefore, the tape running stops once and After starting to drive in the direction, the time until the video is There is a problem that when the amount of input is large, the time until the video is reproduced becomes long.

[0012]   The present invention has been made in order to solve the problems of the above-mentioned conventional example. In a recording / reproducing apparatus using a recording tape, after detecting the recording start position signal, Speed of the tape in the reverse direction depending on the amount of overrun until the tape stops running Index search, especially for overrun tapes The purpose is to reduce the time required to return to the position.

[0013]

[Means for Solving the Problems]

  In order to achieve the above object, the device of claim 1 is a capstan that generates a driving force. A motor, a controller for controlling the rotation speed of the capstan motor, and the cap A reel stand that rotatably supports the reel of the winding side and the supply side of the driving force of the stun motor. A power transmission mechanism that selectively transmits to one of the reel bases, and a magnetic recording tape. Control signal for detecting the recording start position signal for index search recorded in the loop After the recording start position signal is detected by the head and the control signal head, Overrun of the magnetic recording tape until the running of the magnetic recording tape is stopped And an overrun amount detecting section for detecting the amount A magnetic recording tape with an index search function to fast forward or rewind the recording tape. In a recording and reproducing device using a loop,   Overlap of the magnetic recording tape detected by the overrun amount detection unit A predetermined value to be compared with the recording amount and the recording start position after the magnetic recording tape has stopped running. When the magnetic recording tape is run in the reverse direction to the position where the position signal is detected, The rotation speed for driving the stun motor, which is the normal playback / reverse playback rotation speed. A storage unit that stores a predetermined reverse rotation speed that is faster than   When performing the index search, the control unit uses the control signal head. When the recording start position signal is detected, the drive of the capstan motor is stopped. Stop running the magnetic recording tape, and detect the overrun amount detection unit. The overrun amount of the magnetic recording tape that has been If the run amount is less than the specified value, the normal playback / reverse playback rotation speed is used. The capstan motor is driven in the reverse direction to move the magnetic recording tape to the recording start position signal. Signal to the detection position, and when the overrun amount exceeds the predetermined value, The capstan motor is driven in the reverse direction at the predetermined rotation speed to drive the magnetic recording tape. Position corresponding to the overrun amount before the detection position of the recording start position signal. Return to the fixed position, and then at the normal playback / reverse playback rotation speed, the capstan model Drive the magnetic recording tape to return the magnetic recording tape to the detection position of the recording start position signal. .

[0014]   With this configuration, when the overrun amount is larger than the predetermined value, the normal The reverse direction of the capstan motor at a specified rotation speed that is faster than the playback / reverse playback speed of Drive to return the magnetic recording tape to the predetermined position according to the amount of overrun, and Start the recording by driving the capstan motor at a low normal playback / reverse playback rotation speed. Since it returns to the position where the position signal is detected, there is no need to worry about the amount of overrun as in the conventional example. Instead, drive the capstan motor uniformly at the normal playback / reverse playback rotation speed to Compared to returning the recording tape, overrun in index search It is possible to shorten the time required to return the tape to the original stop position. Also , The normal rotation speed of the capstan motor just before the reverse running of the magnetic recording tape is stopped The rotation of the capstan motor is stopped because the playback speed of the Immediately after that, the running of the magnetic recording tape also stopped, and overrun in the opposite direction was almost It does not occur.

[0015]   The invention of claim 2 is a capstan motor for generating a driving force, and the capstan motor. A control unit for controlling the rotation speed of the pusher motor and a drive of the capstan motor One of the reel stands that rotatably support each reel on the take-up side and the supply side. Power transmission mechanism that selectively transmits to the reel stand of the Control signal head for detecting a recording start position signal for index search, and the control After the recording start position signal is detected by the signal head, the magnetic recording tape is run. Detecting the overrun amount of the magnetic recording tape until the line stops A run amount detector, and fast-forwards the magnetic recording tape to the recording start signal position. Is a magnetic recording tape that has an index search function for rewinding. In raw equipment,   When performing the index search, the control unit uses the control signal head. When the recording start position signal is detected, the drive of the capstan motor is stopped. Stop running the magnetic recording tape, and move to the detection position of the recording start position signal. When the magnetic recording tape is run in the reverse direction, it is detected by the overrun amount detection unit. Depending on the amount of overrun of the ejected magnetic recording tape, the capstan mode Drive the tape in the opposite direction by changing the rotation speed of Return to the detection position of the start position signal.

[0016]   With this configuration, the capstan mode can be adjusted according to the amount of overrun. Since the rotation speed when driving the motor in the reverse direction is changed, the amount of overrun Regardless of, the capstan motor is driven uniformly at the normal playback / reverse playback rotation speed. Compared to returning the magnetic recording tape by The time required to return the run tape to its original stop position can be shortened. It

[0017]   Further, the invention of claim 3 is the recording and reproducing apparatus of claim 2, If the run amount is less than the specified value, the capstan will be played at normal playback / reverse playback rotation speed. It is characterized in that the magnetic recording tape is returned by driving the motor in the reverse direction.

[0018]   With such a configuration, the capster is stopped immediately before the reverse running of the magnetic recording tape is stopped. Since the rotation speed of the drive motor has been lowered to the normal playback / reverse playback rotation speed, As soon as the stun motor stops rotating, the magnetic recording tape also stops running, Almost never overruns.

[0019]

[Embodiment of device]

  This embodiment of the present invention will be described. FIG. 1 shows the magnetic field in this embodiment. It is a structure of a recording and reproducing apparatus using a recording tape. Figure 1, tape cassette 20, the winding-side reel 21, and the supply-side reel 22 are indicated by a chain double-dashed line.

[0020]   The recording / reproducing apparatus 1 using the magnetic recording tape is configured to wind inside the tape cassette 20. Winding-side pulleys that respectively support the rotation of the reel reel 21 and the supply reel 22 Table 8 and supply side pulley table 9 and magnetic recording tape (hereinafter referred to as "tape") 25 A capstan motor 2 for generating a driving force for driving the vehicle, A drive pulley 4 fixed to a rotary shaft 3 of a motor 2 and a drive pulley via a belt 5. 4 is a clutch pulley which is connected to the motor 4 and is rotated by the driving force of the capstan motor 2. 6 and the rotation direction of the capstan motor 2, that is, the rotation direction of the clutch pulley 5. And the driving force is applied to either the winding side reel base 8 or the supply side reel base 9. The idler pulley 7 that selectively transmits the tape is placed at a position facing the traveling path of the tape 25. Control signal head 10 which also functions as an audio head, and a cap for normal playback. The tape is clamped between the rotating shaft 3 of the stun motor 2 to keep the tape running speed constant. The video signal track on the tape 25 and the pinch roller 11 for controlling A head cylinder 12 with a built-in video head for reading out the A tape guide mechanism 1 for winding the tape 25 around the head cylinder 12 when it is raw It is composed of 3 etc.

[0021]   In addition, the bottoms of the take-up reel stand 8 and the supply-side reel stand 9 are wound respectively. Reel sensor 1 for detecting the rotation speed of the side reel stand 8 and the supply side reel stand 9 4 and 15 are provided. The counter 40 is connected to the control signal head 10. Therefore, the number of control signals detected by the control signal head 10 is counted. Also An encoder (frequency sensor) 19 is installed on the rotary shaft 3 of the capstan motor 2. And the pulse signal is output as the capstan motor 2 rotates. There is. Capstan motor 2, reel sensors 14 and 15, encoder 19, cover The unter 40 is connected to the control unit 16, respectively. The control unit 16 By monitoring the frequency of the pulse signal from the coder 19, the capstan model The rotation speed of the motor 2 is detected. The operation unit 41 is, for example, a remote control device or a recording / reproducing device. Operation switch, etc., which allows the user to select the index search mode and It is used to set the feed or rewind time.

[0022]   The control unit 16 includes a ROM that stores a control program and the like, and a counter 40 that controls the ROM. A RAM for temporarily storing the counts of the output control signals and a control program Control of capstan motor 2 on / off, rotation direction and rotation speed according to ram etc. It is composed of a CPU and the like for controlling. In addition to the counter 40, the control unit 16 includes a test Controls a predetermined value and capstan motor 2 to be compared with the overrun amount of loop 25 The storage unit 17 such as a ROM that stores a predetermined rotation speed for Calculate the tape overrun amount from the counted number of the control signal A CPU or the like which detects the overrun amount and compares the detected overrun amount with the above predetermined value. The calculation unit 18 configured by is connected.

[0023]   The storage unit 17 is a capstan model for various modes of the recording / reproducing apparatus. The rotation speed of the data 2 is stored, but the rotation speed during index search The control signal head 10 detects the recording start position signal from the tape 25. A predetermined search speed that is equal to or lower than a limit speed that can be obtained is stored. This search Speed is faster than normal fast-forward or rewind speed (several hundred times normal playback / reverse playback speed) Although slow, it is much faster than the normal play / reverse play speed. Also After the recording start position signal is detected by the control signal head 10, the tape 25 is run. As the rotation speed in the opposite direction when returning the overrun until the line stops, The raw / reverse reproduction speed and a predetermined speed higher than that are stored. This high speed place The constant speed is, for example, an intermediate speed between the search speed and the reproduction / reverse reproduction speed.

[0024]   When performing an index search, the control signal head 10 outputs a recording start position signal. When detecting, the control unit 16 stops driving the capstan motor 2 and For example, from the reel sensor on the driven side (in FIG. 1, the reel sensor 15 on the supply side) The pulse signal is monitored to confirm that the tape 25 has stopped running. Average Then, the counter 40 counts the number of control signals detected by the control signal head 10. It counts and inputs to the calculating part 18 via the control part 16. Overrun amount detector In the calculation unit 18 functioning as, the control unit 16 stops driving the capstan motor 2. The counter 40 between the time it is confirmed and the tape 25 is stopped. By using the count number of the control signal counted more, the tape 25 is overrun. Detect the amount. The control signal is placed on the control signal track on the tape 25 at the beginning of the tape. Since it is recorded at regular intervals from to the end, the count number of control signals By multiplying the time corresponding to the above-mentioned fixed interval by 5 is calculated as the recording time.

[0025]   The controller 16 records the amount of overrun of the tape 25 detected by the calculator 18. The predetermined value stored in the storage unit 17 is compared. If the overrun amount is less than or equal to the specified value Then, the control unit 16 further controls the capstan motor 2 at the normal reproduction / reverse reproduction rotation speed. Is driven in the reverse direction to return the tape 25 to the detection position of the recording start position signal. Also, If the overrun amount exceeds the specified value, once the cap The stun motor 2 is driven in the reverse direction. The tape 25 is at the detection position of the recording start position signal. When the capstan motor 2 is returned to a predetermined position according to the amount of overrun in front, Change the rotation speed of the normal playback / reverse playback rotation speed to detect the recording start position signal Put it back in place. The tape 25 is recorded by driving the capstan motor 2 in the reverse direction. When returning to the detection position of the start position signal, the control signal detected by the control signal head 10 No. 40 is counted by the counter 40 to detect the returning amount of the tape 25.

[0026]   Time-stamp of rotation speed of capstan motor 2 in index search Is shown in FIG. In FIG. 2, (a) is the time when the overrun amount is small. 2B is a time chart when the overrun amount is large. . In the figure, P1 is the timing at which the recording start position signal is detected, and P2 is the caps. The tape 25 is turned on at the timing of reversing the rotation direction of the tan motor 2, P3 and P5. When the index search is completed by returning to the opposite direction by the amount of overrun , P4 is the reverse rotation speed of the capstan motor 2 when the overrun amount is large. The timing at which the speed is switched from a high-speed predetermined speed to a low-speed playback / reverse playback speed. Represent each.

[0027]   The audio signal head (not shown) is located at the same location as the control signal head 10. The tapes 25 are stacked in a direction orthogonal to the running direction of the tape 25, The audio signal head is an audio signal track provided near the upper end of the tape 25. Audio signal is read from the tape and the control signal head 10 moves near the lower end of the tape 25. The control signal is read from the control signal track provided nearby.

[0028]   As described above, the control signal track is recorded with a signal representing time at regular intervals. The recording start position signal and recording end position signal on the tape are recorded. It The control signal, the recording start position signal, and the recording end position signal are the same control signal track. However, for example, the ratio of the high-level and low-level time of the signal (du It is possible to distinguish between the two by changing the duty ratio).

[0029]   In index search, run the tape 25 at a faster speed than during normal playback. However, the recording start position signal on the control signal track is detected and communication is started from the detected position. The normal playback is performed to locate the video that the user wants to see. In Figure 1, fast forward The tape 25 is shown in FIG. Runs from the left supply side reel 22 to the right winding side reel 21. To go. It is also possible to perform an index search in the rewinding direction. On the spot Tape 25 is wound from the take-up reel 21 on the right side to the supply reel 22 on the left side. Drive so that it can be removed.

[0030]   Next, regarding the operation of the recording / reproducing apparatus 1 of the present embodiment, the flowchart shown in FIG. It will be explained with reference to the chart. For example, as shown in Fig. 1, wind up to the end of the tape. It is assumed that the tape cassette in the returned state is loaded in the recording / reproducing apparatus. In this state It is assumed that the user operates the operation unit 41 to select the index search.

[0031]   The control unit 16 drives the capstan motor 2 at high speed at a predetermined search speed (S 1). When the tape 25 starts running, the control unit 16 controls the control signal head 10. Recording start position from the control signal read from the control signal track on the tape 25 Performs a process of detecting a signal. When the recording start position signal is detected (S2), the control unit 16 stops driving the capstan motor 2 (S3). At the same time, counter 40 Starts counting the number of control signals detected by the control signal head 10 ( S4).

[0032]   Further, the control unit 16 sends a pulse signal from the reel sensor 15 on the supply side, for example. It is confirmed by monitoring that the tape 25 has stopped running (S5). Tape running When the operation is stopped, the arithmetic unit 18 controls the counter of the control signal counted by the counter 40. The number of unds is used to calculate (detect) the overrun amount of the tape 25 (S6).

[0033]   When the overrun amount of the tape 25 is obtained, the control unit 16 controls the overrun amount of the tape 25. The run amount is compared with a predetermined value stored in the storage unit 17 (S7). Overla When the amount is less than the predetermined value (YES in step S7), normal playback / reverse playback rotation The capstan motor 2 is driven in the reverse direction at the speed (S8), and the amount of overrun is equivalent. The tape 25 is returned (S9), and the drive of the capstan motor 2 is stopped (S10). ). As a result, the tape 25 stops at the detection position of the recording start position signal and the index Kusu search is completed.

[0034]   On the other hand, when the overrun amount exceeds the predetermined value (NO in step S7), The control unit 16 once drives the capstan motor 2 in the reverse direction at a high predetermined rotation speed. (S11), the tape 25 is the overrun amount before the detection position of the recording start position signal. When it is returned to the predetermined position according to (S12), the rotation speed is changed to the low speed playback / reverse playback speed. The capstan motor 2 is driven by changing the rotation speed (S13). And tota Tape 25 so that the amount of tape 25 returned corresponds to the overrun amount (S 14), the drive of the capstan motor 2 is stopped (S15). As a result, the tape No. 25 stops at the detection position of the recording start position signal and the index search is completed .

[0035]   The "high speed predetermined speed" in step S11 is set in advance. It may be one speed, or multiple speeds depending on the size of the tape 25 overrun. Has been set, and it corresponds to the overrun amount detected in step S6. It may be configured to select one of the speeds. Or tape overlap It is also possible to obtain a predetermined speed by calculation according to the amount of the engine Is. In the case of the latter two, in the case of step S12 The "fixed position" is a predetermined speed selected according to the amount of overrun of the tape 25, That is, it is preferable to change the capstan motor 2 according to the rotation speed. The “predetermined position corresponding to the amount of overrun” does not always mean that the tape 25 is overrun. It is not necessary to change the amount depending on the run amount, and the amount of overrun of tape 25 Despite a fixed position, for example, at a predetermined time from the detection position of the target recording start position signal It may be at a position just before this.

[0036]   In the above embodiment, the control signal is set as the overrun amount of the tape 25. Count of control signals detected by the head 10 and counted by the counter 40 The recording time on the tape 25, which was obtained by multiplying the number of packets by a predetermined time, was used. The amount of tape 25 overrun is not limited to this, Alternatively, the count number of the control signal counted by the controller 40 may be used. Furthermore, Instead of the count number of the control signal detected by the control signal head 10, the reel sensor It is also possible to use the count number of the pulse signal output from the server 14 or 15. It

[0037]   Furthermore, in the above embodiment, the index search in the fast-forward direction of the tape is performed. Although I explained about it, the same applies to the index search in the tape rewinding direction. Can be applied to. In addition, as an example of a recording / reproducing apparatus using a magnetic recording tape, The VTR has been described above, but the present invention is not limited to this, and the present invention is not limited to this. Magnetic recording for audio signal recording, which records a audio signal and a control signal when necessary It goes without saying that it can be applied to index search on tape.

[0038]

[Effect of device]

  As described above, according to the first aspect of the invention, the recording start position is controlled by the control signal head. Tape overrun between the time the signal is detected and the running of the magnetic recording tape is stopped. If the run amount is larger than the specified value, the capstan mode will be Drive the tape in the reverse direction to move the tape to the position before the detection position of the recording start position signal. Return to a predetermined position according to the run amount, and at lower normal playback / reverse playback rotation speed Drive the capstan motor to return the tape to the detection position of the recording start position signal. Therefore, regardless of the amount of tape overrun as in the conventional example, it is normally When the capstan motor is driven at the playback / reverse playback rotation speed to return the magnetic recording tape, Compared with the case of The time required to return to the stop position can be shortened. Also, for magnetic recording tape Immediately before the reverse running is stopped, the capstan motor rotation speed is changed to normal playback / reverse playback rotation. Since it is slowing down, the magnetic recording will start as soon as the rotation of the capstan motor is stopped. The recording tape also stops running, and overrun in the opposite direction hardly occurs.

[0039]   Further, according to the invention of claim 2, the control signal head detects the recording start position signal. Depending on the amount of overrun from when the magnetic recording tape runs until it stops Then, since the rotation speed when driving the capstan motor in the reverse direction is changed, By uniformly driving the capstan motor at the normal playback / reverse playback rotation speed, the magnetic recording Looped-back index search It is possible to shorten the time required to return the pump to the original stop position. Especially, When the rotation speed of the capstan motor is 3 stages or more, depending on the amount of burran Depending on the situation, it is possible to change it steplessly. It is also possible to make the time for returning the overrun amount in the opposite direction almost constant. is there.

[0040]   Further, according to the invention of claim 3, the magnetic recording tape is stopped immediately before the reverse running is stopped. Since the rotation speed of the capstan motor is reduced to the normal playback / reverse playback rotation speed, As soon as the rotation of the capstan motor is stopped, the magnetic recording tape will also stop running. , Overrun in the opposite direction hardly occurs.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a recording / reproducing apparatus using a magnetic recording tape according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an index search operation in the recording / reproducing apparatus.

FIG. 3 is a time chart of a rotation speed of a capstan motor during an index search operation in the recording / reproducing apparatus.

[Explanation of symbols]

1 Recording / reproducing device 2 capstan motor 8 Take-up reel stand 9 Supply side reel stand 10 Control signal head 14 Rewind side reel sensor 15 Supply side reel sensor 16 Control unit 17 Memory 18 Calculation unit (overrun amount detection unit) 21 winding reel 22 Supply side reel 25 tapes (magnetic recording tapes) 40 counter

Claims (3)

[Scope of utility model registration request] 1. A capstan motor that generates a driving force, a control unit that controls the rotation speed of the capstan motor, and a driving force of the capstan motor that rotatably supports each reel on the winding side and the supply side. A power transmission mechanism that selectively transmits to any one of the reel bases,
A control signal head for detecting a recording start position signal for index search recorded on a magnetic recording tape, and a period from when the recording start position signal is detected by the control signal head until the traveling of the magnetic recording tape is stopped. Recording / reproducing using a magnetic recording tape having an index search function for fast-forwarding or rewinding the magnetic recording tape to the recording start signal position. In the apparatus, a predetermined value that is compared with the overrun amount of the magnetic recording tape detected by the overrun amount detection unit and the magnetic recording up to the detection position of the recording start position signal after the magnetic recording tape has stopped running. The rotation speed for driving the capstan motor when the tape is run in the reverse direction, Further comprising a storage unit that stores a predetermined reverse rotation speed that is higher than the normal reproduction / reverse reproduction rotation speed, and when performing the index search, the control unit outputs the recording start position signal by the control signal head. When detected, the drive of the capstan motor is stopped to stop the running of the magnetic recording tape, and the overrun amount of the magnetic recording tape detected by the overrun amount detection unit is compared with the predetermined value, When the overrun amount is less than or equal to the predetermined value, the capstan motor is driven in the reverse direction at the normal reproduction / reverse reproduction rotation speed to return the magnetic recording tape to the detection position of the recording start position signal, When the overrun amount exceeds the predetermined value, the capstan motor is driven in the reverse direction at the predetermined rotation speed to move the magnetic recording tape forward. Return to a predetermined position according to the overrun amount before the detection position of the recording start position signal, and further drive the capstan motor at the normal reproduction / reverse reproduction rotation speed to move the magnetic recording tape to the recording start position. A recording / reproducing apparatus using a magnetic recording tape characterized by returning to a signal detection position. 2. A capstan motor that generates a driving force, a control unit that controls the rotational speed of the capstan motor, and a driving force of the capstan motor that rotatably supports each reel on the winding side and the supply side. A power transmission mechanism that selectively transmits to any one of the reel bases,
A control signal head for detecting a recording start position signal for index search recorded on a magnetic recording tape, and a period from when the recording start position signal is detected by the control signal head until the traveling of the magnetic recording tape is stopped. Recording / reproducing using a magnetic recording tape having an index search function for fast-forwarding or rewinding the magnetic recording tape to the recording start signal position. In the apparatus, when performing the index search, the control unit stops driving the capstan motor to stop the magnetic recording tape from running when the control signal head detects the recording start position signal. When the magnetic recording tape is run in the reverse direction to the position where the recording start position signal is detected, According to the overrun amount of the magnetic recording tape detected by the burran amount detection unit, the rotational speed of the capstan motor is changed to drive in the reverse direction,
A recording / reproducing apparatus using a magnetic recording tape, wherein the magnetic recording tape is returned to the detection position of the recording start position signal. 3. The magnetic recording tape is returned by driving the capstan motor in the reverse direction at a normal reproduction / reverse reproduction rotation speed when the overrun amount is equal to or less than a predetermined value. A recording / reproducing apparatus using the magnetic recording tape according to 2.