JPH0418095Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention provides a magnetic recording and reproducing device that has a simple configuration and is capable of reversing operation.

(B) Prior art Various magnetic recording and reproducing devices equipped with an automatic reversing mechanism have been proposed in the past, but switching between the reversing mechanism and a normal traveling device is complicated, and transmission of gears, partially toothed gears, etc. A means is required, and the device becomes large-scale. Therefore, it became a factor of high cost, and there remained concerns about reliability.

(c) Purpose of the invention The present invention has been made in view of the above points, and aims to provide a magnetic recording and reproducing device that realizes a reversing mechanism with a simple configuration and does not impair the normal means of travel. be.

(d) Structure of the invention This invention has a solenoid iron core that assumes two linear positions based on a reversal signal, and a linear movement of the solenoid iron core that selectively drives the second reel gear and the second reel gear. In a magnetic recording and reproducing device comprising a reversing device constituted by a drive transmission member that transmits force, a pinch of the drive transmission member that selectively transmits the driving force to the first reel gear and the second reel gear. A reversing device is provided for selectively fitting the roller to the capstan into two positioning holes provided in the fixing member to determine forward or reverse travel.

(E) Embodiment FIG. 1 is a plan view showing the magnetic recording and reproducing apparatus of the present invention in a non-playing state, in which 1 shows a magnetic head 4 positioned on a magnetic head mounting table 2 by shaft pins 3, 3. The first chassis shaft 5 is accommodated in the first elongated hole 6, and the head board has a protruding shaft 9 inserted into a through hole 8 provided in the chassis 7, and is mounted so as to be slidable in the vertical direction. It is biased upward by springs 10, 10, one end of which is locked to the chassis 7.

Next, PA is the first solenoid that operates by suction when the play switch (described later) is turned on, and the first iron core 11 is connected to the shaft pin 12 by the dogleg-shaped first rotary plate 1.
The first solenoid is connected to one end of the third solenoid.
By adsorption of the first iron core 11 of PA, it is rotated counterclockwise about the second chassis shaft 14 as a fulcrum, and the protruding shaft 15 implanted in the other end of the dogleg-shaped rotary plate 13 is attached to the head board 1. The head board 1 is brought to the playing position and locked by pressing downwardly on the second elongated hole 16 provided in the head board 1.

Next, reference numerals 17 and 18 denote first and second reel gears, which are provided with a plate-up reel shaft formed by bending the chassis 7, and are selectively given driving force by a reversing device to be described later. This becomes the supply reel gear.

Next, 19 is the above-mentioned reversing device, which includes a second solenoid PB having a second iron core 20 that linearly assumes two positions in response to a reversing signal, and a second solenoid PB that
One end is connected by a shaft pin 21 passed through the second iron core 20 of the PB, and the third chassis shaft 2
2, the other end of which is always biased clockwise by a sheath spring 23, biases a control lever 31 (described later) to the right when the second solenoid PB is demagnetized. rotating plate 24
The other end of the second rotary plate 24 has a long groove 26 into which a protruding pin 25 is inserted, and the rotational movement of the second rotary plate 24 causes the first and second long grooves 2
7, 28, fourth and fifth chassis shafts 29, 30
A control lever 31 which is housed and slides between two left and right positions;
a pinch roller selection member 36 that selectively presses the first and second pinch rollers 32, 33 against the first and second capstans 34, 35 when the head board 1 is in the performance position; Become.

Next (see FIG. 2), the control lever 31 is provided with an inverted triangular (〓) through hole 37 in the center, and a triangular (〓) through hole 38 is provided in the chassis 7. It is configured to overlap. A triangular (〓) through groove 38 provided in the chassis 7 has first and second positioning holes A and B separated by a protrusion C provided at the bottom. Adjust the control lever 31 so that the inverted triangular (〓) top 370 of the control lever 31 overlaps A and B.
1 can take two positions. The apex 380 of the triangular (〓) through hole provided in the chassis 7 and the other two corners 371 and 372 of the inverted triangular (〓) through hole 38 provided in the control lever 31 are directed toward the right side of the control lever 31. When moving to the left corner 371, and control lever 3
1 to the left, the right corners 372 overlap.

Next (referring to FIG. 3), the pinch roller selection member 36 is rotatably attached to a planting pin 39 planted in the head board 1, and one end is attached to a square-shaped pin 39 provided in the head board 1. A through hole 37 passing through the through hole 40 and having an inverted triangular shape (〓) of the control lever 31;
A protruding shaft 41 is provided that passes through a triangular (ⓓ) transparent groove 38 provided in the chassis 7. Then, when the protruding shaft 41 is inserted into the first and second positioning holes A and B of the triangular (〓) transparent groove 38, and is inserted into the first positioning hole A, it rotates counterclockwise, 1st
The pinch roller 32 is selected, and the spring 42 wound around the planting pin 39 provides a force to press against the first capstan 43, and the spring 42 causes the second pinch roller 33 to be separated from the second capstan 44. , rotates clockwise when inserted into the second positioning hole B, and the second pinch roller 33
Select the second capstan 4 by the spring 42.
The first pinch roller 32 is configured to obtain a force for pressing against the first capstan 43 and to separate the first pinch roller 32 from the first capstan 43.

The first and second pinch rollers 32 and 33 are fixed by shaft pins 49 and 50 to rotating arms 47 and 48 that are pivotally supported by sixth and seventh chassis shafts 45 and 46, respectively.

Next, 51 and 52 are first and second flywheel gears formed coaxially with the first and second capstans 43 and 44, and are driven by a motor 53 through a rubber belt (not shown) in opposite directions (counterclockwise). first and second brackets 54 and 55 are rotatably mounted on the first and second capstans 43 and 44, respectively, and are pivoted at the other ends of the first and second brackets 54 and 55. A rotational force is imparted to the play gears 56 and 57. The first and second brackets 54 and 55 are applied with rotational force counterclockwise and clockwise, respectively, by chassis springs 58 and 59 provided at both ends of the chassis 7.

And the first and second play gears 56, 57
The shaft pins 34 and 35 face a rectangular long groove 60 provided on the left side of the chassis 7, a rectangular long groove (not shown) provided on the right side of the chassis 7, and a rectangular long groove 61 provided on the control lever 31. , and when the control lever 31 is moved in the left-right direction, the left end 310 and the rectangular long groove 61 come into contact with the shaft pins 34 and 35 of the first bracket 54 and the second bracket 55, so that the first and second brackets are selectively moved. It is configured to be pressed against the reel gears 17 and 18. However, in the first bracket 54, a long hole 65 at one end of the third doglegged rotary plate 64 is inserted into a protruding pin 62 implanted at the other end, and the other end is connected to the stepped portion 1 of the head board 1.
10, counterclockwise rotation is prevented in the non-performance position.

Next, the solenoid drive circuit 70 that controls the first and second solenoids PA and PB to perform running and reversing operations will be described. FIG. 4 is a waveform diagram showing the voltage applied to the solenoid of the present invention, and the horizontal axis is time.

FIG. 5 shows the solenoid drive circuit of the present invention.
In the figure, 71 and 72 are switching transistors that switch the first and second solenoids PA and PB, and their respective bases are connected to the Q output terminal of the R-S flip-flop 73, and the toggle flip-flop 74 is connected to the Q output terminal of the R-S flip-flop 73. Connected to the Q output terminal. A signal is transmitted to the set terminal S of the R-S flip-flop 73 when the play switch 75 is turned on, and a signal is transmitted through the first and second delay circuits 77 and 78 when the reverse switch 76 is turned on. The signal is configured to be supplied via an OR circuit 79. Further, a reverse switch 76 and an eject switch 80 are connected to the reset terminal R. Next, a signal is input to the toggle terminal T of the toggle flip-flop 74 via the first delay circuit 77 by operating the reverse switch 76, and is reset by turning on the eject switch 80. .

The traveling and reversing operations of the present invention having such a configuration will be explained. First, in the non-playing state shown in FIG. 1, the spring 42 wound around the stud pin 39 expands almost horizontally, and no force is generated to energize the first and second pinch rollers 32, 33. At this time, the protruding shaft 41 of the pinch roller selection member 36 is connected to the rectangular through hole 40 of the head board 1, the top part 380 of the triangular (ⓓ) through groove 38 provided in the chassis 7, and the left side of the inverted triangular shape (ⓓ). Since the corners 371 overlap, they are in a neutral position.

When the play switch 75 is operated in this state, the R-S flip-flop 73 shown in FIG. 5 is set and the first solenoid PA is energized.
Then, the first iron core 11 is attracted and the first rotary plate 13 is rotated counterclockwise. Therefore, the protruding shaft 15 of the first rotary plate 13 moves downward, and the head board 1 is moved downward to the performance position. The head board 1 is connected to the first chassis shaft 5.
and moves downward along the first elongated hole 6 and the through hole 8 by the protruding shaft 9.

At this time, if the inversion signal is not applied to the second solenoid PB, the second iron core 20
3, the second rotary plate 24 is urged and rotated clockwise, moving the control lever 31 to the right. Therefore, the rectangular long groove 61 of the control lever 31 pushes the shaft pin 35 of the second bracket 55 to the right against the chassis spring 59, thereby separating the second play gear 57 from the second reel gear 18. There is. Then, since the third rotary plate 64 is disengaged from the head board 1, the first bracket 54 can rotate counterclockwise by moving the head board 1 downward, so that the chassis spring The reel gear 17 approaches the first reel gear 17 due to the biasing force of the control lever 38, and as the head board 1 moves downward, the control lever 31 pinches along the left end 373 of the inverted triangular (〓) through hole 37. The protruding shaft 41 of the roller selection member 36 moves (FIG. 6A), and the first of the triangular (ⓓ) through grooves 38 provided on the head substrate 1 is moved.
is inserted into the positioning hole A. At this time, the first play gear 56 is pressed against the first reel gear 17. Then, by fitting the pinch roller selection member 36 into the first positioning hole A, the pinch roller selection member 36 rotates counterclockwise, and the spring 42 wound around the planting pin 39 tilts upward to the right. The first pinch roller 32 is pressed against the first capstan 43, and the second pinch roller 33 is separated from the second capstan 44.

Therefore, the first reel gear 17 becomes a take-up reel, and the magnetic tape (not shown) is wound to the left as shown in FIG. 7, and the performance begins.

Next, it will be explained that the reversal operation is performed in such a performance state. Now, when the reverse switch 76 shown in FIG. 5 is turned on, the R-S flip-flop 7
3 is reset and de-energizes the first solenoid PA. Therefore, the head board 1 has a spring 1
0 and 10, it is moved upward and enters the non-performance state shown in FIG.

Next, this inverted signal is supplied to the toggle flip-flop 74 via the first delay circuit 77, so the second solenoid PB is activated (see FIG. 4) and attracts the second iron core 20. . Therefore, the second
The rotating plate 24 is rotated counterclockwise to move the control lever 31 to the left.

Therefore, as shown in FIG. 8, the right corner 372 of the inverted triangular (ⓓ) through hole 37 provided in the control lever 31 is connected to the top 380 of the triangular (ⓓ) through hole 38, and the inverted triangular (ⓓ) through hole The apex 370 of the hole 37 corresponds to and overlaps the second positioning hole RO of the triangular (〓)-shaped through groove 38.

Therefore, an inverted signal is supplied to the set terminal S of the R-S flip-flop 73 via the second delay circuit 78, so that the first solenoid PA is again energized, causing the head board 1 to move downward and play. move to position. At this time, as the head substrate 1 moves downward, the protruding shaft 41 of the pinch roller selection member 36 is moved along the right end 374 of the inverted triangular shape (ⓓ), and is fitted into the second positioning hole.

Since the pinch roller selection member 36 rotates clockwise, the second pinch roller 33 is brought into pressure contact with the second capstan 44, and the first pinch roller 32 is separated from the first capstan 43.
That is, the reversing operation is completed (see FIG. 9).

As described above, according to the present invention, in the reversing operation, the control lever is moved to determine the pinch roller to be selected by the pinch roller selection member, and then the head board is moved to the performance position and the pinch roller is pressed against the capstan. This eliminates the need to use large solenoids for moving and locking the head board.

(f) Effects of the invention As described above, the magnetic recording and reproducing device of the invention is provided with a fixing member that presses the pinch roller of the drive transmission member that selectively transmits the driving force to the first reel gear and the second reel gear to the capstan. Since the structure is configured such that traveling in the forward direction and traveling in the reverse direction is determined by selectively fitting into the two positioning holes, the configuration is simple and the driving force can be selectively switched reliably. This has great practical effects.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the magnetic recording and reproducing device of the present invention in a non-playing state, Fig. 2 is a diagram used to explain the invention, and Fig. 3 shows the passage between the protruding shaft of the pinch roller selection member and the head board. A perspective view showing the positional relationship between the hole, the control lever through-hole, and the chassis through-hole, FIG. 4 is a waveform diagram showing the operation timing of the traveling/reversing device of the present invention, and FIG. 5 is the traveling shown in FIG. 4.・A diagram showing the solenoid drive circuit of the present invention that executes the operation timing of the reversing device, FIG. 6 is a diagram explaining the operation of the present invention, FIG. 7 is a plan view showing the performance state of the present invention, and FIG. FIG. 9, which is a diagram illustrating the operation of the present invention, is a plan view showing a playing state during reverse running. PA...First solenoid, PB...Second solenoid, 1...Head board, 7...Chassis, 1
7...First reel gear, 18...Second reel gear, 19...Reversing device, 20...Iron core, 23...
... Chassis spring, 31 ... Control lever, 32 ...
First pinch roller, 33... Second pinch roller, 36... Pinch roller selection member, 37... Inverted triangular through hole, 38... Triangular through groove, 41
... Protruding shaft, 42... Spring, 43, 44... Capstan.

Claims (1)

[Scope of utility model registration request] A solenoid iron core that assumes two linear positions based on a reversal signal, and a drive transmission member that selectively transmits driving force to a first reel gear and a second reel gear by linear movement of the solenoid iron core. In the magnetic recording and reproducing device comprising the reversing device configured, a pinch roller of a drive transmission member that selectively transmits driving force to the first reel gear and the second reel gear is selectively pressed onto the capstan. A magnetic recording and reproducing device characterized in that the reversing device is provided so as to determine whether to travel in a forward direction or in a reverse direction by selectively fitting into two positioning holes provided in a member.