JPH067466Y2 - Tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is adapted to rotationally drive a cam rotor for moving a head substrate by utilizing the rotational force of a tape recorder, in particular, an idler for driving a reel base. About tape recorders

(Prior Art) It is already known about a tape recorder in which a reel base and a cam rotating body for moving a head substrate back and forth when switching operation modes are rotationally driven by using a driving force of a single motor. Therefore, the present applicant has filed a utility model registration application for a tape recorder having a simplified structure by improving such a tape recorder (see Japanese Utility Model Publication No. 61-33230).

The tape recorder according to the above-mentioned application receives a drive rotating body arranged in an intermediate portion of two reel stands and a rotational driving force of the drive rotating body, and moves between the two reel stands to move one of them. An idler for rotationally driving the reel base and a cam rotor for moving the head substrate are provided, and the rotational drive force of the idler is applied to the cam rotor within the moving range of the idler between the two reel bases. In addition to being configured to be able to transmit, the regulating means for regulating the movement of the idler between the reel stands at a position where the rotational force of the idler can be transmitted to the cam rotating body is provided.

According to this tape recorder, since the idler for driving the reel base also drives the cam rotating body for moving the head substrate, the structure can be simplified.

(Problems to be Solved by the Invention) An object of the present invention is to further improve the tape recorder according to the above-mentioned application and to control the restricting means for restricting the movement of the idler between the reel stands by a solenoid. In addition, it is possible to reduce the power consumption by eliminating the continuous excitation of the solenoid when switching the operation mode, and to reliably switch between the rotation drive of the reel base through the idler and the rotation drive of the cam rotor. To provide a tape recorder.

(Means for Solving the Problems) The present invention is to move between the two reel bases by receiving a drive rotating body disposed at an intermediate portion of the two reel bases and a rotational driving force of the drive rotating body. Then, an idler for rotationally driving one of the reel stands and a cam rotating body for moving the head substrate are provided, and the rotation driving force of the idler is within the moving range of the idler between the two reel stands. A tape recorder provided with a regulating means for regulating the movement of the idler between reel stands at a position where the rotational force of the idler can be transmitted to the cam rotating body. The regulating means has a first position where the idler can freely move, a second position where the movement of the idler can be completely regulated and the rotational force of the idler can be transmitted to the cam rotor, and an upper position. It is characterized in that it is arranged between the first position and the second position so as to be able to take a third position where the movement of the idler can be restricted by the intermediate portion of the two reel stands. .

(Operation) When the restricting means is in the first position, the idler can freely move between the two reel stands according to the direction of rotation of the driving rotor, and the idler rotationally drives either reel stand. And wind the tape. When the restricting means is in the second position, the movement of the idler is completely restricted at a position where the rotational force of the idler can be transmitted to the cam rotating body for moving the head substrate, and the position of the head substrate is restricted by the cam rotating body. Then, the operation mode is switched. When the restricting means is in the third position, the movement of the idler is restricted by the intermediate portion of the two reel stands. By controlling the direction of rotation of the drive rotor that drives the idler and the position of the regulating means, it is possible to switch the transport direction of the tape and the operation mode.

(Example) In FIG. 1, two reel stands 21 arranged on the left and right,
One motor 11 is arranged in the intermediate portion of 22, and a small-diameter gear 13 as a driving rotating body is fixedly mounted on the output shaft 12 of the motor 11. Also, a lever 14 is rotatably attached to the output shaft 12, and a friction mechanism such as a friction member or a friction spring is interposed between the lever 14 and the output shaft 12 or the gear 13, so that the lever The gear 14 can be rotated by swinging its head from side to side depending on the direction of rotation of the gear 13. lever
A shaft 15 is fixedly planted at the tip of the shaft 14, and an idle gear (hereinafter referred to as “idler”) 16 is rotatably supported on the shaft 15. The idler 16 always meshes with the gear 13,
The idler 16 also moves as the lever 14 rotates in accordance with the direction of rotation of the lever 13. Idler 16
The reel stands 21 and 22 are located within the moving range of the reel stand.
The idler 16 is engaged with the gears formed on the peripheral surfaces of the reels 21 and 22, so that the reel stands 21 and 22 are driven to rotate.

The idler 16 is integrally formed with a small diameter gear 17. A gear 18 and a small-diameter gear 19 which are integrally formed are rotatably supported by a shaft 23 at an intermediate portion between the reel stands 21 and 22. The gear 19 always meshes with a gear 25 formed on the peripheral surface of the cam rotating body 24. The lever 14 is a reel stand as shown in FIG.
When in the intermediate position between 21 and 22, the gear 17 and the gear 18 are engaged with each other. The cam rotor 24 is rotatably provided around a shaft 26 and has a cam surface 27 inside. A driven pin 28, which is integrally provided on a head substrate (not shown), is in contact with the cam surface 27. The head board is provided so as to be movable in the vertical direction in FIG. The position of is regulated.

In FIG. 1, so as to overlap the reel stands 21 and 22,
Regulation levers 31, 32 are provided. Restriction lever 31, 32
Are rotatably provided around shafts 33 and 34 near the rotation shafts of the reel stands 21 and 22, respectively, and extend laterally toward the shaft 15 of the lever 14. The regulating levers 31, 32 are urged to rotate clockwise and counterclockwise by relatively weak springs 35, 36, respectively, and a plunger 39 of a solenoid 38 is provided in a long hole 37 formed at one end of one regulating lever 31. And a pin 40 integral with is fitted. When the solenoid 38 is excited,
The restriction lever 31 is adapted to be rotated counterclockwise against the biasing force of the spring 35.

A protrusion 41 is provided at the tip of the regulating lever 31 extending toward the lever 14.
The protrusion 41 is located on the side of the other regulating lever 32, and when the regulating lever 31 rotates counterclockwise, the protrusion 41 pushes the side edge of the regulating lever 32 to move the regulating lever 32 clockwise. It is designed to be rotated. As shown in FIG. 2, a gentle valley-shaped edge portion is formed at the tip of the regulating lever 31 extending toward the lever 14 by two inclined edges 42 and 43 having different inclination directions. A groove 44 is formed in a portion corresponding to the bottom of the valley, following the edge of the valley. At the tip of the other regulating lever 32 extending toward the lever 14, a gentle valley-shaped edge is formed by the two inclined edges 45 and 46 whose inclination directions are different from each other. A groove 47 is formed in the portion corresponding to the bottom of the valley.

The regulating levers 31, 32 serve as regulating means for regulating the movement of the idler 16 between the reel bases 21, 22, and when the solenoid 38 is excited, the regulating levers 31, 32 are formed as shown in FIG. Rotate counterclockwise and clockwise, respectively, and the inclined edges 42, 43, 45, 46 of their tips escape from the shaft 15 of the lever 14, so that the idler 16 moves in accordance with the rotation direction of the gear 13. You will be able to move freely. The positions of the restriction levers 31, 32 at this time are referred to as a first position.

As shown in FIG. 1, when the idler 16 is located substantially in the center of its moving range and the solenoid 38 is demagnetized, the shaft 15 of the lever 14 is the tip of the regulating levers 31, 32. In the grooves 44, 47 of the idler 16, the rotational force of the idler 16 is the gear 17,
It is in a state of being transmitted to the cam rotating body 24 through 18, 19.
The positions of the restriction levers 31, 32 at this time are referred to as second positions.

As shown in FIG. 3, when the lever 14 rotates clockwise with the clockwise rotation of the gear 13 and the solenoid 38 is demagnetized, the shaft 15 of the lever 14 is restricted. The restriction levers 31 and 32 are in the middle of the first position and the second position while hitting the inclined edge 43 of the lever 31 and the inclined edge 46 of the restriction lever 32. At this time, one side edge of the groove 47 of the restriction lever 32
49 advances into the range of movement of the shaft 15 and prevents the shaft 15 from trying to move left and right in FIG. 3 past the middle of its range of movement. Also, as shown in FIG.
When the lever 14 rotates counterclockwise with the counterclockwise rotation of 13 and the solenoid 38 is demagnetized,
The shaft 15 of the lever 14 is aligned with the inclined edge 42 of the restriction lever 31 and the restriction lever.
The restricting levers 31, 32 are in the middle between the first position and the second position while hitting the inclined edge 45 of 32. At this time, one side surface 48 of the groove 44 of the restriction lever 31 advances into the movement range of the shaft 15,
It prevents the shaft 15 from moving laterally in FIG. 4 past the middle of its range of motion. 3 and 4 above
The position of the regulating levers 31, 32 in the state shown in the figure is the third position.

Next, the operation of the above embodiment will be described.

When switching the operation mode, as shown in FIG. 1, when the solenoid 38 is demagnetized and the regulating levers 31, 32 are in the second position, the motor 11 is normally or reversely rotated,
The cam rotor 24 is rotated through the gears 13, 16, 17, 18, and 19. Since the position of the pin 28 and the head substrate integrated with the pin 28 is determined according to the rotational position of the cam rotating body 24, the motor 11 is stopped at the rotational position of the cam rotating body 24 according to the operation mode to be switched. The rotation position of the cam rotor 24 is detected by a detection switch (not shown), and when the detection switch corresponding to the designated operation mode operates, the motor 11
Mode switching is automatically performed by stopping.

When the reel base is rotationally driven, first, as shown in FIG. 2, the solenoid 38 is excited to restrict the regulating lever 31,
32 is set to the first position, and the motor 11 is normally or reversely rotated.
When the gear 13 is driven to rotate clockwise by the drive of the motor 11, the lever 14 is rotated clockwise, the idler 16 engages with the gear on the peripheral surface of the reel stand 22 on the left side, and the reel stand 22 moves clockwise. The tape is wound around the reel stand 22 side. After the lever 14 rotates as described above, the solenoid 38 is demagnetized. Thereafter, as shown in FIG. 3, the regulating levers 31 and 32 are held at the third position, and the tape winding on the reel base 22 side is continued. Here, since the rotation biasing springs 35 and 36 of the restriction levers 31 and 32 can be relatively weak springs, the inclined edges 43 and 46 of the restriction levers 31 and 32 are sufficient.
When the shaft 15 hits the shaft 15, the inclined edges 43 and 46 do not push the shaft 15 back.

When switching the operation mode from the state shown in FIG. 3, the motor 11 is rotated counterclockwise while the solenoid 38 is demagnetized. When the motor 14 rotates, the lever 14 rotates counterclockwise, and when the shaft 15 reaches the positions of the grooves 44, 47 of the restriction levers 31, 32, the restriction levers 31, 32 rotate in the urging direction. Then, the second position as shown in FIG. 1 is taken, and the shaft 15 enters the grooves 44 and 47 to completely restrict the movement of the idler 16 in the left-right direction. At this time, even if the shaft 15 tries to move to the right through the positions of the grooves 44 and 47, the groove of the restriction lever 32 is
Even if the regulating levers 31, 32 are blocked by one side edge 49 of the spring 47 and the spring biasing force of the regulating levers 31, 32 is weak, the mode switching of the shaft 15 and the idler 16 supported by the shaft 15 as shown in FIG. Definitely reach the position.

After the mode switching, when the reel table 21 on the right side is rotationally driven to wind the tape on the reel table 21 side, as shown in FIG. To the first position, and in this state the motor 11
To drive the gear 13 to rotate counterclockwise. The rotation of the gear 13 also causes the lever 14 to rotate counterclockwise,
The idler 16 engages with the gear on the peripheral surface of the reel stand 21 on the right side, and the reel stand 21 is driven to rotate counterclockwise.
The tape is wound on the side. After the lever 14 has rotated as described above, the solenoid 38 is demagnetized, and thereafter, as shown in FIG. 4, the regulating levers 31 and 32 are held in the third position to continue the winding of the tape. To be done.

When switching the operation mode from the state shown in FIG. 4, the motor 11 is driven to rotate clockwise while the solenoid 38 is demagnetized. As the motor 14 is driven, the lever 14 rotates clockwise, and when the shaft 15 reaches the positions of the grooves 44 and 47 of the restriction levers 31 and 32, the restriction levers 31 and 32 are moved to the first position as in the case described above. By taking the second position as shown in the figure, the lateral movement of the idler 16 is completely restricted. At this time, even if the shaft 15 tries to pass through the positions of the grooves 44 and 47, the restriction lever
Even if the regulating levers 31, 32 are weakly biased by the springs 35, 36 by being blocked at one side edge 48 of the groove 31 of the groove 31, the operation mode switching position as shown in FIG. 1 can be surely reached. To be

The operation mode can include stop in addition to recording / reproducing, fast-forwarding, rewinding, and the like.

As described above, according to the above-described embodiment, the rotation positions of the regulating levers 31 and 32 are set to the first position where the idler 16 can freely move, and the movement of the idler 16 is completely regulated to rotate the idler 16. The idler 16 is provided between the second position where the force can be transmitted to the cam rotating body 24 and the intermediate between the first position and the second position.
Since the movement of the solenoid can be set to the third position where it can be regulated by the intermediate portion between the two reel stands 21 and 22, the solenoid 38 can be excited only temporarily when the operation mode is switched, and the mode switching operation is performed. Since it is not necessary to excite for the entire time, power consumption can be reduced. Also,
Since the control levers 31 and 32 can be set to the third position, the solenoids are used for the entire mode switching operation time.
The mode switching operation can be reliably performed without exciting 38.

It should be noted that when the solenoid 38 is excited, the regulation of the idler 16 is released, and when the reel bases 21 and 22 are being driven via the idler 16, the solenoid 38 is demagnetized, and the regulation levers 31 and 32 are demagnetized.
It is not impossible to completely restrict the movement of the idler 16 only by the return force of the, but in that case, the restriction lever
If the urging force of 31 and 32 is increased, the force to move the idler 16 toward the completely regulated position acts and adversely affects the reel base drive. Idler 16 by reducing the bias of
In some cases, it may not be possible to reliably reach the completely regulated position. In this respect, according to the embodiment of the tape recorder according to the present invention, since the regulating levers 31, 32 are set to the third position, the idler 16 can be operated even if the regulating levers 31, 32 have a weak biasing force. Can surely bring the idler 16 to the completely restricted position without passing over the predetermined position, and the above-mentioned problem is solved.

Next, another embodiment of the tape recorder according to the present invention will be described.

FIGS. 5 and 6 show an embodiment in which one restricting means for restricting the movement of the idler is used. In FIG. 5, the regulating lever 51 as the regulating means is rotatably supported about the shaft 52 and is urged to rotate clockwise by the spring 53. A solenoid is provided in the long hole 54 at one end of the regulating lever 51.
When the pin 40 fixedly fixed to the plunger 39 of 38 is fitted and the solenoid 38 is excited, the regulating lever 51 is rotated counterclockwise against the spring 53. At one side edge of the other arm end of the regulating lever 51 extending toward the lever 14, two gently inclined edges 55 and 56 having different inclination directions are formed, and the inclined edges 55 and 56 are A groove 57 is formed between them. As shown in FIG. 6, beveled edges 55,
56 has a step, and a part of one side edge of the groove 57 corresponding to the step is a contact edge 58 with the shaft 15 of the lever 14. The regulating lever 51, like the regulating levers 31 and 32 in the above-described embodiment, has a first position in which the idler 16 can freely move when the solenoid 38 is excited, as shown in FIG. , Idler 16 movement is completely regulated
The second position capable of transmitting the rotational force to the cam rotor 24 and the first and second positions when the shaft 15 hits the inclined edge 55 or the system edge 56 in the demagnetized state of the solenoid 38. It is adapted to take a third position which is placed in an intermediate position. In addition, the same components as those in the above-mentioned embodiment are designated by the same reference numerals.

In the above embodiment, the restricting lever 51 takes the first position when the solenoid 38 is excited, and the idler 16 is moved in accordance with the rotation direction of the gear 13 to move the reel base 21, as in the case of the above embodiment. 22 rotary drive positions are taken. Also,
As shown in FIG. 5, when the solenoid 38 is demagnetized when the idler 16 is at the intermediate position, the restricting lever 51 takes the second position, and the cam rotor 24 rotates like the above embodiment. It is driven to switch the operation mode. And
As shown in FIG. 6 (a), the shaft 15 is the regulating lever.
When the shaft 15 is in contact with the inclined edge 55 of the regulating lever 51 or the shaft 15 is in contact with the inclined edge 56 of the regulating lever 51, as shown in FIG. The reel stand 21 or the reel stand 22 is driven through the idler 16 to wind the tape.

When changing from the state of FIG. 6 (a) to the mode switching state,
The shaft 15 is moved to the left by the reverse rotation of the motor 11. When the shaft 15 returns to the position of the groove 57 of the restriction lever 51, the restriction lever 51 rotates in the urging direction to completely restrict the movement of the shaft 15. At this time, the shaft 15 comes into contact with the contact edge 58 of the regulating lever 51 and the groove 57
The shaft 15 is completely regulated by means of, and the mode is switched. On the other hand, when the mode switching state is changed from the state shown in FIG. 6B, the shaft 15 is once moved rightward by the reverse rotation of the motor 11 to pass the position of the groove 57 and then the motor 11 is further reversed. As a result, the shaft 15 is brought into contact with the regulating lever 51 at the contact edge.
By abutting against the shaft 58, as in the case of FIG. 6 (a), the complete regulation of the shaft 15 by the groove 57 is surely performed. Such forward / reverse operation of the motor may be performed by microcomputer control or the like based on a position detection signal of the shaft 15 or the like. Note that the step difference between the inclined edge 55 and the inclined edge 56 of the restriction lever 51 may be reversed.

In the embodiment of FIGS. 7 and 8, the braking force is applied to the two reel bases by utilizing the movement of the position controlling solenoid of the regulating means.

In FIGS. 7 and 8, the plunger 39 of the solenoid 38 is shown.
Is connected to the restriction lever 31 by fitting the pin 40 into the long hole 37 of the restriction lever 31, and the pin 63 fixedly planted in the plunger 39 is fitted into the long hole of one end of the brake lever 61. The brake lever 61 is connected by combining. The brake lever 61 is rotatably provided around a shaft 62. The other arm of the brake lever 61 has a gear 13
A brake arm 65 is pivotally attached to the end of the arm by a shaft 64. The brake arm 65 is arranged so as to straddle the reel bases 21 and 22, and brake members 66 and 67 made of rubber or the like are attached to both ends of the brake arm 65. The brake members 66 and 67 are the reel stand 21,
It faces the circumference of 22. Other configurations are similar to those of the embodiment shown in FIGS. 1 to 4, and the same reference numerals are given to the same components.

According to the above-described embodiment, when the operation mode is changed, particularly when the high-speed winding mode is changed to the stop mode, the reel bases 21 and 22 can be braked by temporarily exciting the solenoid 38. The slack of the tape can be prevented. For example, now
When the idler 16 rotationally drives the reel base 21 or 22 to switch to the next operation mode, the motor 11 is turned off, the solenoid 38 is temporarily excited, and the brake lever 61 is moved to the position shown in FIG. In (1), the brake members 66 and 67 are rotated counterclockwise to be pressed against the reel bases 21 and 22, and the reel bases 21 and 22 are braked. Then solenoid 38
Is demagnetized and the motor 11 is driven to perform a predetermined operation mode switching operation. In this way, when the operation mode is switched from the tape transport state, the reel base is temporarily braked, so that the slack of the tape due to the inertial force of the reel base is prevented.

Since the restriction lever 31 and the brake lever 61 move in conjunction with each other, the restriction levers 31 and 32 may be provided with the brake members 66 and 67, respectively, without providing the brake lever 61.

In the illustrated embodiment, the restricting means are all levers, but they may be sliding members that move linearly. In the illustrated embodiment, the transmission of the rotational force between the rotary members is performed by gears. However, all or a part of the rotational force transmission mechanism may be configured by a belt or roller transmission mechanism. Does not matter. Although the position of the idler is regulated by regulating the shaft of the idler in the illustrated embodiment, it may be regulated by the support body of the idler or a projection integrally formed on the support body. .

(Effect of the Invention) According to the present invention, the position of the idler to which the rotational force is to be transmitted to the reel base and the mode switching cam rotating body is restricted by the restricting means, and the restricting means prevents the idler from moving. A first position that can move freely, a second position that completely restricts the movement of the idler and can transmit the rotational force of the idler to the cam rotating body, and the first position and the second position. Since it is arranged in the middle so that the movement of the idler can be set to the third position where the intermediate portion of the two reel stands can be regulated, when the regulation means is controlled by, for example, a solenoid, the operation mode When switching the solenoid, it is sufficient to temporarily excite the solenoid to bring the restricting means to the third position, and it is not necessary to excite the solenoid for the entire mode switching operation time. Therefore, the power consumption can be reduced. You can Further, since the idler can be reliably brought to the mode switching position by causing the restricting means to take the third position when the mode is switched, the mode switching operation can be surely performed.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a tape recorder according to the present invention, FIG. 2 is a plan view showing a different operation mode of the same embodiment, and FIG. 3 is a plan view showing a different operation mode of the same embodiment. FIG. 4 is a plan view showing still another operation mode of the same embodiment, FIG. 5 is a plan view showing another embodiment of the tape recorder according to the present invention, and FIG. 6 is a view of the regulating means in the same embodiment. FIG. 7 is a plan view showing a part thereof, FIG. 7 is a plan view showing still another embodiment of the tape recorder according to the present invention, and FIG. 8 is a front view of a solenoid portion in the same embodiment. 13 …… Gear as drive rotating body, 16 …… Idler 21, 22 …… Reel stand, 24 …… Cam rotating body 31, 32, 51 …… Regulating lever as regulating means

Claims (1)

[Scope of utility model registration request] 1. A drive rotating body disposed in an intermediate portion between two reel stands, and a rotary driving force of the drive rotating body is received to move between the two reel stands so that either one of the reel stands is moved. An idler that is rotationally driven and a cam rotor that moves the head substrate are provided so that the rotational drive force of the idler can be transmitted to the cam rotor within the movement range of the idler between the two reel stands. In addition, the tape recorder is provided with a regulating means for regulating the movement of the idler between reel stands at a position where the rotational force of the idler can be transmitted to the cam rotating body. A first position that can move the idler completely, a second position that completely restricts the movement of the idler and can transmit the rotational force of the idler to the cam rotating body, and the first position and the second position. Be between, tape recorder comprising configured to be taken and a third position which can restrict the movement of the idler at the two reel mount the intermediate portion.