KR100282139B1 - Drive system of tape recorder - Google Patents

Abstract

A drive system of a tape player having a rotation transmission mechanism for transmitting rotation of the drive motor to a transmission gear mechanism for driving a tape winding reel. This transmission mechanism has a primary endless belt that transmits the driving force of the drive motor to a secondary flywheel coaxial with a secondary capstan, and a gear that meshes with a gear configured coaxially with the secondary flywheel. And a secondary endless belt that transmits the rotation of the intermediate gear pulley and the intermediate gear pulley to a primary flywheel coaxial with the primary capstan. If necessary, the drive motor is transmitted to the transmission gear mechanism via an intermediate gear pulley or a secondary flywheel.

Description

Drive system of tape recorder

1 is an exploded top plan view of a cassette tape player according to an embodiment of the present invention.

2 is a rear plan view of a cassette tape player viewed from the rear of the player, showing magnetic recording and / or playback heads and associated parts thereof.

3 is a bottom plan view from which the cassette casing of the cassette tape player is removed.

4 is an enlarged bottom plan view showing a part of the mechanism shown in FIG. 3, showing a state where the quick feed lever is stopped at the stop position.

FIG. 5 is a view similar to FIG. 4 showing the quick feed lever released in the stop position by the primary control lever during reverse drive of the drive motor. FIG.

FIG. 6 is a view similar to FIG. 4 showing the moment when the quick feed lever is released. FIG.

FIG. 7 is a view similar to FIG. 4 showing a state immediately after the quick feed lever is released. FIG.

FIG. 8 is a view similar to FIG. 4 showing the state during the rewinding mode. FIG.

FIG. 9 is a view similar to FIG. 4 showing the state during the quick feed mode. FIG.

FIG. 10 is a view similar to FIG. 4 showing the transition state from the stop position or the rewinding mode to forward drive regeneration. FIG.

FIG. 11 is a view similar to that of FIG. 4 showing a state during forward drive regeneration. FIG.

FIG. 12 is a view similar to FIG. 4, showing a state during reverse drive regeneration. FIG.

Fig. 13 is a bottom plan view of the cassette tape player showing various rotating elements such as gears indicating their respective positions while the quick feed lever is in the stop position after the quick feed lever is released.

FIG. 14 is a view similar to FIG. 13 showing a state during forward drive regeneration. FIG.

FIG. 15 is a view similar to FIG. 13 showing a state during reverse drive regeneration. FIG.

FIG. 16 is a view similar to FIG. 13 showing a state during rapid supply. FIG.

FIG. 17 is a view similar to FIG. 14 showing a state during rewinding; FIG.

FIG. 18A is a plan view of a pinch roller and magnetic recording and / or playback head showing states during the quick feed, rewind and stop positions. FIG.

FIG. 18B is an exploded plan view showing a control element for controlling the respective positions of the pinch rollers and the magnetic head shown in FIG. 18A;

FIG. 19A is a view similar to FIG. 18A, showing a state during forward drive regeneration. FIG.

19B is a view similar to FIG. 18B, showing a state during forward driving.

FIG. 20A is a view similar to FIG. 18A, showing a state during reverse drive regeneration. FIG.

20B is a view similar to FIG. 18B, showing a state during reverse drive regeneration.

21 is a view similar to FIG. 3 showing a variant of the drive system of the invention.

22 is a schematic bottom plan view of a conventional cassette tape player.

[Purpose of invention]

[Technical field to which the invention belongs and the prior art in that field]

The present invention relates to a cassette tape recorder, and more particularly to a cassette tape recorder with improved efficiency of drive transmission.

In recent years, various attempts have been made to minimize the power consumption of cassette tape recorders in order to realize long time playback or information recording. Most cassette tape recorders currently on the market generally employ the drive system shown in FIG. 22, which is cited as the prior art in the present invention.

As shown in FIG. 22, this drive system comprises primary and secondary flywheels 34a, 34b coaxially connected with a drive motor 31, a gear pulley 33, primary and secondary capstans; It consists of an idle pully 34c. The endless drive belt 32 is employed to transmit the driving force of the drive motor 31 to the gear pulley 33. As shown in the drawing, the drive belt 32 rotates around the primary flywheel 34b to drive the primary flywheel in one direction, and rotates around the secondary flywheel 34b so that the drive belt 32 has a rotational direction of the primary flywheel 34a. After driving the secondary flywheel in the opposite direction, the primary move extends from the drive motor 31 to the gear pulley 33 and the drive mower from the gear pulley 33 after rotating around the idle pulley 34c. Has a secondary movement extending to the rotor 31.

As is well known, the drive motor is under heavy load when the cassette tape player is set to a fast feed or rewinding mode to quickly move the magnetic tape from one reel to the other. By adjusting the tension of the endless drive belt in consideration of the highest possible load on the drive motor, it minimizes possible breakage of the drive belt and ensures sufficient drive force to be transmitted to other moving parts of the cassette tape player.

However, in the drive system shown in FIG. 22, it is transmitted to the gear pulley 33 during the quick feed mode in which the drive motor is driven in the forward direction or during the rewinding mode in which the drive motor is driven in the reverse direction. A drive belt 32 that performs forward movement by the driving force of the driven motor 31, that is, a drive belt 32 that performs one of the primary and secondary movements moving toward the driving motor 31; In addition, the drive belt 32 which moves away from the return movement, that is, the drive belt 32 which is separated from the drive motor 31 and performs the movement of the other of the primary movement and the secondary movement, is respectively tensioned and loosened. By adjusting the tension of the receiving belt, the required tension can be obtained by the driving force transmitted during the counterclockwise rotation of the drive motor 31. For example, when the driving force transmitted during the quick supply is lower than that during the rewinding, the tension obtained during the quick supply is adjusted to be the required tension.

However, when the belt tension is selected in the above manner, one of the moving belts that causes the high tension, such as the belt tension that appears during rewinding, tends to increase to a value higher than the required tension, so that the load on the belt and the drive moat 31, the pressure acting on the gear pulley 33 and the primary and secondary flywheels 34a and 34b increases excessively to lower the rotational efficiency.

The present invention substantially solves the above problems inherent in the drive system of a conventional cassette tape player, and reduces the tension of each belt that transmits the rotational force of the drive motor to a minimum required value so as to realize increased rotational efficiency. It is an object to provide an improved drive system in a tape recording and / or playback device.

In order to achieve this object, the present invention provides a drive system for a tape player that includes a rotational force transmission mechanism for transmitting the rotational force of the drive motor to a transmission gear mechanism for driving a tape winding reel. The transmission mechanism is an intermediate gear pulley and intermediate gear with a primary endless belt that transmits the driving force of the drive motor to a secondary flywheel coaxially connected with the secondary capstan, and a gear in which the secondary flywheel meshes with a coaxially configured gear. It consists of a secondary endless belt that transmits the rotational force of the pulley to the primary flywheel coaxially connected with the primary capstan. If necessary, the driving force of the drive motor is transmitted to the transmission gear mechanism via an intermediate gear pulley or a secondary flywheel.

The belt loosened under the present invention may have the same length during rapid feeding and rewinding of the magnetic tape by the forward driving force and the reverse driving force of the driving motor, and the rotational load of the belt is selected by selecting the minimum necessary tension. Minimizes the power consumption of the tape player to achieve high transmission efficiency. In addition, if the design that transmits the driving force of the drive motor to the transmission gear mechanism through the intermediate gear pulley or the secondary flywheel is adopted, the load represented by the transmission gear mechanism is only the load of the belt, which further increases the tension of the secondary belt. Choosing a minimized value can provide even more energy savings to your tape player.

Various objects and features of the present invention will be described in detail below with reference to the accompanying drawings in accordance with a preferred embodiment. In the drawings, the same reference numerals are used for the same parts.

The cassette tape player of the present invention shown in the drawings, with reference to the accompanying drawings, comprises primary and secondary capstans configured to protrude vertically in one direction so as to rotate away from each other along the front edge of the chassis and to the chassis. A longitudinal plate-shaped chassis with (1a, 1b). Tape cassettes in one direction for the normal reproduction of information from the magnetic tape using the primary capster 1a (shown in dashed lines in FIGS. 1, 18a, 19a and 20a) And move the magnetic tape in the opposite direction for reverse playback of information from the magnetic tape using the secondary capstan 1b. The primary capstan 1a and the secondary capstan 1b are coaxially connected with the primary and secondary flywheels 2a and 2b, respectively, and rotate together, while the primary and secondary flywheels 2a and 2b As shown in FIG. 2, it is located on one side of the chassis opposite to the primary and secondary capstans 1a and 1b.

(3) is an electric reversible drive motor drive coupled with the secondary flywheel 26. Therefore, it is connected with the secondary capstan 1b via the primary endless belt 4a. The driving force of the drive motor 3 transmitted to the secondary flywheel 2b is then integrally coaxially engaged with the large diameter gear 2ba coaxially integrated with the secondary flywheel 2b and meshed together. It is transmitted to the intermediate gear pulley 5 with the rotating large diameter gear 5a. Since the intermediate gear pulley 5 is drive-coupled with the primary flywheel 2a, it is connected with the primary capstan 1a via the secondary endless belt 4b. It can be seen here that the primary and secondary flywheels 2a, 2b are driven in opposite directions with respect to each other by the driving motor 3.

(6) is a known method for driving motor 3 for one of the primary and secondary reels 7a, 7b, which is driven in engagement with a spool in the tape cassette when the tape cassette is inserted into the cassette tape player. Represents a transmission gear mechanism for selectively transmitting drive force. The transmission gear mechanism has a large diameter gear 6aa which is rotatably configured in the chassis and meshes with the large diameter gear 5a and a small diameter gear coaxially integrated with the large diameter gear 6aa. A primary relay gear 6a comprising 6ab and a main gear 6b meshing with this small diameter gear 6ab. The main gear 6b is frictionally mounted on a bearing boss of the friction gear 6d which is pressed into the friction pulley 6c, for example through a felt piece, so that the friction pulley ( 6c) is under the force of the compression spring in frictional contact. It should be noted here that the friction gear 6d shown above is located midway between the main gear 6d and the chassis as shown in FIGS. 3 to 17.

6e denotes a play gear inserted between the main gear 6b and the chassis as shown in FIGS. 13 to 17. This play gear 6e is rotatably mounted on a support pin 9a which is fixed to the play lever 9 which meshes with the friction gear 6d and pivots around the pivot pin 8. The play gear 6e may occupy any one of the primary, secondary and tertiary positions in the manner described below depending on the position of the play lever 9 around the pivot pin 8. That is, when the play gear 6e is in the primary position, the rotational force of the play gear 6e is transmitted to the primary reel gear 6h which is coaxial with the primary reel 7a, and the play gear When 6e is in the secondary position, the rotational force of the play gear 6e is transmitted to the secondary reel gear 6j coaxial with the secondary reel 7b, and the play gear 6e is in the tertiary position. If present, the play gear 6e is separated from one of the primary and secondary reel gears 6h and 6j.

6f is an idle gear rotatably configured in the chassis, which meshes with the play gear 6e when the play gear 6e is in the primary position. Primary reel 7a through primary reel drive gear 6g which drives the rotational force of play gear 6e transmitted to idle gear 6f to intervene between primary reel gear 6h and idle gear 6f. ) Can be transmitted to the primary reel gear (6h) coaxial with. Therefore, when the play gear 6e is in the primary position, the rotational force of the play gear 6e can be transmitted to the primary reel 7a via the idle gear 6f and then through the primary reel drive gear 6g.

6i denotes a secondary reel drive gear that is rotatably configured in the chassis and meshes with a secondary reel gear 6j coaxial with the secondary reel 7b. The secondary reel drive gear 6i meshes with the play gear 6e when the play gear 6e is in the secondary position to transmit the rotational force of the play gear 6e to the secondary reel gear 6j. Therefore, when the play gear 6e is in the secondary position, the rotational force of the play gear 6e can be transmitted to the secondary reel 7a via the secondary reel drive gear 6i.

6ka denotes a primary quick feed gear that meshes with the main gear 6b, and 6ka denotes a secondary quick feed gear that selectively engages with the primary and secondary drive gears 6g and 6j. The primary and secondary quick feed gears 6ka, 6kb are primary quick feed gears frictionally pushed against the secondary quick feed gear 6kb by, for example, bias springs such as compression springs (not shown in the figure). In addition to (6 kb), the quick feed lever 10 is rotatably mounted coaxially. The quick feed lever 10 has a generally arched primary slot 10a for receiving a pin 11a fixed at one end of the secondary control lever 11, and also has a general housing for the pin 12. It has an arch-shaped secondary slot 10b. The quick feed lever 10 pivots at an angle between the primary and secondary positions past the neutral position guided by the pins 11a and 12 and then moves within the primary and secondary slots 10a and 10b. do. That is, when the quick feed lever 10 is in the primary position, as shown in FIG. 8, the primary quick feed gear 6ka is engaged with the main gear 6b so that the secondary quick feed gear 6kb is primary. Drive engagement with the reel drive gear 6g, and when the primary quick feed lever 10 is in the secondary position, as shown in FIGS. 9 and 16, the primary quick feed gear 6ka is the main gear 6b. ) Engages the secondary quick feed gear (6 kb) with the secondary reel drive gear (6i), with the quick feed lever (10) in the neutral position in FIGS. 3, 4, and 13 The secondary quick feed gear 6 kb is positioned away from either one of the primary and secondary reel drive gears 6g, 6i.

Reference numeral 13 denotes a mode selector mechanism for controlling the transmission gear mechanism 6 to change the moving direction of the magnetic tape T. This mode selector mechanism consists of a large diameter gear 13aa which is rotatably configured in the chassis and meshes with the main gear 6b and a small diameter gear coaxially integral with this large diameter gear 13aa (in the drawing Secondary relay gear 13a, including a not shown), and a large diameter gear 13ba rotatably configured to the chassis to mesh with a small diameter gear (not shown in the figure) of the secondary relay gear 13a; It consists of the tertiary relay gear 13b containing the gear 13bb of the small diameter comprised integrally coaxially with this large diameter gear 13ba. This mode selector mechanism also includes a cam gear 13c intermittently engaged with a small diameter gear 13bb of the tertiary relay gear 13b as will be described below. This cam gear 13c is a small diameter gear (13bb) when the small diameter gear 13bb is joined with one of the primary to tertiary toothless portions 13ca, 13cb, and 13cc as described below. 13bb) has a serrated outer peripheral edge with primary, secondary, and tertiary toothed portions 13ca, 13cb, 13cc. This cam gear 13c has primary and secondary surfaces opposed to each other and the primary surfaces are towards the chassis. The primary and secondary surfaces of the cam gear 13c are formed of primary cam grooves 13cd and secondary cam grooves 13ce, respectively. The cam gear 13c also has tertiary and quaternary cams 13cf and 13cg formed on its primary surface at positions adjacent to the outer periphery of the cam gear 13c.

13d shows a solenoid device including a plate-like plunger 13da and a suction element 13db. This solenoid device 13d has the plunger 13da sucked by the permanent magnet (not shown in the drawing) toward the suction element 13db unless it is electrically activated, but when the solenoid device 13d is electrically activated, the permanent magnet The plunger 13da sucked in by is released. In addition, one end of the solenoid device 13d is pivotally coupled to the free end of the plunger 13da to pull the plunger 13da out of the solenoid device 13d by the spring 13f, that is, the suction element ( 13db) and a solenoid arm 13e biased in a direction to separate the plunger 13da. At the opposite end of the solenoid arm 13e is a pin 13ea which is firmly installed as shown in FIG. 4, which is joined while sliding in the secondary cam groove 13ce of the cam gear 13c.

13g denotes a switching lever pivotally mounted on the pivot pin 18. This switching lever is firmly fixed at one end thereof, and guide pin 13ga which is slid and joined in the primary cam groove 13cd of the cam gear 13c, and firmly fixed at the other end thereof, and is connected to the sliding control panel 13h. Has a connecting pin (13gb). As can be seen from FIGS. 2 and 18 to 20, the sliding control panel 13h extends along the front edge of the chassis and is installed through each carrier arm 13he. The car pinch roller has arm control pins (13 ha, 13hb). More specifically, each carrier arm 13he has a corresponding control pin 13ha or 13hb fixedly installed at one end thereof, and also has an intermediate portion pivotally mounted on a pivot pin 13hf fixedly installed at the control panel 13h. . Each carrier arm 13he is biased by a corresponding spring 13hg until the other end thereof engages a stopper 13hh formed on the sliding control panel 13h. By biasing by the spring 13hg of each of the carrier arms 13he, the primary and secondary pinch roller arm control pins 13ha, 13hb are pushed toward the corresponding primary or secondary pinch rollers 17a or 17b.

Thus the primary and secondary pinch roller arm control pins 13ha, 13hb are the primary and secondary pinch rollers supported in the long length of the roller 15 for pivoting movements in the associated pins 16aa, 16ba. Each of the control elements 16ab, 16bb formed in the arms 16a, 16b is in contact. The primary and secondary pinch rollers 17a, 17b, which cooperate with the primary and secondary capstans 1a, 1b, are rotatably mounted on the primary and secondary pinch roller arms 16a, 16b, respectively. The primary and secondary pinch roller arm control pins 13ha, 13hb eventually operate to selectively engage or drop the primary and secondary pinch rollers 17a, 17b and primary and secondary capstans 1a, 1b. do. As can be seen in FIG. 1, the roller 15 is pivotally supported by primary and secondary holder supports 14a and 14b fixed to the chassis.

In this embodiment, the primary and secondary pinch roller arms 16a, 16b can be freely swung without being biased in any direction. However, only when the cassette tape player is set to the information playback or recording mode, the primary and primary pinch rollers 17a and 17b frictionally engage the corresponding capstans 1a or 1b to move the magnetic tape, and also When the tape player is set to a fast feed or rewinding mode, a design is adopted in which one of the primary and secondary pinch rollers 17a and 17b is separated from the corresponding capstan 1a or 1b.

13i denotes a transmission lever in which the underside of the chassis is supported by the pivot pin 19 for pivoting around the pivot pin 19. The transmission lever 13i is operatively engaged with a connecting pin 13hc fixed at one end thereof to the control panel 13h so as to extend across the thickness of the chassis, and the opposite end is a slot formed in the play lever 9. It is coupled so as to be interlocked with the play lever 9 by a connecting pin 13ia fixed to and engaged with 9b.

Reference numeral 20 denotes a head carrier arm configured in the holder 15 by the pivot pin 20a for pivoting around the pivot pin 20a. The head carrier arm 20 is provided with a magnetic recording and / or reproducing head 21 fixed at the center thereof, and the rear side thereof is formed of a control element 20b. The head carrier arm 20 typically has a magnetic head 21 away from the magnetic tape T and is biased by a spring 22 in one direction around the pivot pin 20a. That is, when the cassette tape player is in the information playback or recording mode, the magnetic head 21 retracts inward from the holder 15 but pivots against the spring 22 to make the primary and secondary capstans 1a, 1b. A portion of the magnetic tape T and the magnetic head 21 are brought into sliding contact therebetween. During the information reproduction or recording mode, the head carrier arm control pin 13hd pushes the control element 20b integrated with the head carrier arm 20 so that the head carrier arm 20 pivots with respect to the spring 22. Contact of the magnetic head 21 and the magnetic tape T becomes possible. In this embodiment, the head carrier arm control pin 13hd is made of a resin spring as shown in FIGS. 18B, 19B, and 20B, so that the magnetic head 21 is required toward the portion of the magnetic tape T. FIG. Make sure you are away from the part of the magnetic tape (T) so as not to protrude too far.

Reference numeral 23 denotes a primary control lever pivotally supported in the middle portion by the pivot pin 23a for pivoting around the pivot pin 23a. This primary control lever 23 is joined along the portion of the primary control lever 23 which is in contact with one end thereof so as to slide with the tertiary cam 13cf and is controlled by the shape of the tertiary cam 13cf at the opposite end. It has a joining pin 23b that selectively engages or falls from the recess 10c. Not only can the position of the quick feed lever 10 be adjusted according to the position of the joining pin 13b with respect to the joining recess 10c, but also the main gear 6b during quick feed or rewinding and at the time of selection of one mode. By transmitting the rotational force of the primary quick feed gear 6ka to the primary quick feed gear 6ka by the friction force to the primary feed lever 1 to move the primary feed lever to the secondary quick feed gear 6kb. ) Is engaged with a selected one of the primary and secondary reel drive gears 6g, 6i.

The secondary control lever 11 shown above has a middle portion pivotally mounted to the pivot pin 23a as shown in FIG. 3, one end of which is slidingly engaged with the fourth cam 13cg and the opposite end thereof. It has a pin 11a with a fourth rack gear 11b. The rack gear 11b is the primary quick feed gear 6ka according to the position of the quick feed lever 10 connected in cooperation with the secondary control lever 11 by the pin 11a accommodated in the primary slot 10a. With a secondary quick feed gear (6 kb) installed on the quick feed lever (10). The secondary control lever 11 pivots with the pin 11a with the end of the secondary control lever 11 slidingly engaged with the fourth cam 13cg and the rack gear 11b toward the main gear 6b. When moved, the primary quick feed gear 6ka is engaged with the main gear 6b. The engagement of the primary quick feed gear 6ka with the main gear 6b in the manner described above is accomplished by the quick feed lever described later, which is stopped by the joining pin 23b fixed by the primary control lever 23 ( 10) the angular motion of 10) is released from the stationary state and then occurs when the quick feed mode is switched to the rewinding mode and when the rewind mode is switched to the fast feed mode. It should be noted here that the friction load applied to the primary and secondary quick feed gears 6ka and 6kb to the quick feed lever 10 by engagement between the rack gear 11b and the secondary quick feed gear 6kb. Regardless, the rotational force of the primary quick feed gear 6ka meshed with the main gear 6b can be transmitted to the quick feed lever 10. Reference numeral 25 also pushes the ends of the primary and secondary control levers 23 and 11 adjacent to the cam gear 13c so as to be in frictional contact with the tertiary and quaternary cams 13cf and 13cf, respectively. Bias spring.

The cassette tape recorder thus constructed operates in the following manner. Before describing the operation of the cassette tape recorder under any one of various operation modes, the function of the cam gear 13c will be described.

As shown above, the cam gear 13c has a toothless portion 13ca, 13cb, 13cc and a toothed outer peripheral edge. When the cam gear 13c is fixed in position and joined with one of the small diameter gear 13bb and the toothless portion 13ca, 13cb, 13cc of the tertiary relay gear 13b, one of the various modes is selected. Mode is used. That is, when the small-diameter gear 13bb is joined to the toothless portion 13ca, the cassette tape recorder becomes the forward drive information reproduction mode. When the small-diameter gear 13bb is joined to the toothless portion 13cb, the cassette tape recorder becomes the reverse driving information reproduction mode. When the small-diameter gear 13bb is joined to the toothless portion 13cc, the cassette tape recorder is in one of a stop position, a quick feed mode and a rewinding mode.

Similarly, according to each position of the cam gear 13c, the various cams 13cd to 13cg perform a function suitable for one mode selected from various operation modes. That is, by controlling the guide pin 13 of the switching lever 13g using the primary cam 13cd, the position of the control panel 13h suitable for one mode selected from various operation modes can be determined through the switching lever 13g. have. When the solenoid device 13d is electrically operated by releasing the mode conversion start induced by the solenoid device 13d using the secondary cam 13ce to the cam gear 13c, and the plate-shaped plunger 13da is released, The pin 13ea of the solenoid arm 13e is in sliding contact with the inclined cam surface of the secondary cam 13ce and rotates the cam gear 13c clockwise by a constant distance to make the teeth of the cam gear 13c outward. The peripheral edge of the side is engaged with the gear 133 having a smaller diameter (see FIG. 10). If an engagement occurs between the small-diameter gear 13bb and the toothed outer peripheral edge of the cam gear 13c, the cam gear 13c during operation of the tertiary relay gear 13b driven by the drive motor 3. ) Is rotated, and the subsequent toothless portion and the small diameter gear 13bb are joined. Bonding pin 23b on the primary control lever 23 according to the selected operating mode using a tertiary cam 13cf frictionally engaged with the end of the primary control lever 23 away from the engaging pin 23b. Control the position of The position of the quick feed lever 10 with respect to the main gear 6b, i.e., the primary and secondary quick feed gears, using the fourth cam 13cg which is frictionally engaged with the end of the secondary control lever 11, 6ka, 6kb).

[Stop position (see FIGS. 4 and 18)]

As shown in FIG. 4, when the cassette tape player is in the stop position, the small diameter gear 13bb of the tertiary relay gear 13b comes into contact with the toothless third portion 13cc of the cam gear 13c. In this state, the function of the primary cam 13cd causes the control panel 13h to be in the intermediate position via the switching lever 13g, and under the conditions as shown in FIG. 18, the primary and secondary pinch roller arm control pins. 13ha, 13hb will be in a position not to push the control elements 16a, 16b of the corresponding primary and secondary pinch roller arms 16a, 16b, and thus primary and secondary pinch rollers 17a, 17b. ) Are separated from the primary and secondary capstans 1a and 1b, respectively. Hereby, the play gear 6e is separated from the secondary reel drive gear 6j and the idle gear 6a via the transmission gear 13i and the play lever 9. The head carrier arm control pin 13hd is also in a position that does not apply pressure to push the control element 20b integral with the head carrier arm 20 as shown in FIG. 18. The head carrier arm 20 with the magnetic head 21 is therefore retracted backward by the action of the bias spring 22, ie inside the holder 15 and the magnetic head 21 is the magnetic tape T. It will not be in contact with the part of.

4 shows a state immediately after the cassette tape player reaches the stop position. Therefore, even when the drive motor 3 rotates in the forward direction, even if the primary quick feed gear 6ha engaged with the main gear 6b is being driven, the joining pin 23b fixed by the primary control lever 23 is the quick feed lever. The quick feed lever 10 does not operate because it falls into the bonding recess 10c of the 10. Therefore, the secondary quick feed gear 6kb is separated from the secondary reel drive gear 6i to stop the secondary reel 7b. Therefore, the magnetic tape T does not rotate during the movement immediately before the stop position is determined.

[Release the Rapid Feed Lever (See FIGS. 5 to 7 and 13)]

When the quick feed lever 10 is released, the stop position shown in FIG. 4 shifts to the rewinding or quick feed mode without changing the position of the cam gear 13c. In other words, starting from the stop position, the drive motor 3 is driven and rotated in the reverse direction opposite to the forward direction, and the main gear 6b is driven in the reverse direction to drive the primary quick feed gear 6ka, and the primary quick feed gear. By the frictional load applied to 6ka and the quick feed lever 10, the quick feed lever 10 is turned clockwise and guided by the pins 11a and 12 as shown in FIG. Move in slots 10a and 10b, respectively.

As a result of this pivoting movement of the quick feed lever 10, the primary and secondary conveyed to the quick feed lever 10 are independent of the frictional load applied between the primary and secondary quick feed gears 6ka, 6kb. By the rotational force of the quick feed gears 6ka and 6kb, the rack gear 11b and the secondary quick feed gear 6kb are engaged so that the quick feed lever 10 is turned further clockwise.

This additional pivoting of the quick feed lever 10 allows separation of the joining pin 23b and the primary control lever 23 from the joining recess 10c of the quick feed lever 10 as shown in FIG. The quick feed lever 10 is lifted up. At the moment when the quick feed lever 10 is dismantled, the joining pin 23b fixed by the primary control lever 23 is separated from the projection 10ca formed at the free end of the recess 10c in the position shown in FIG. Will be maintained. As shown in FIG. 7, the state in which the cassette tape player is in the stop position immediately after the quick feed lever 10 is released is as shown in FIG. In this state, the end of the primary control lever 23 adjacent to the cam gear 13c is adjusted with the recess of the tertiary cam 13cf so that the quick feed lever 10 during the release movement shown in FIG. 5 and FIG. Is still separated during the state of FIG.

However, as shown in FIG. 10, when the quick feed lever 10 is released, the primary control lever 23 is rotated clockwise by the biasing force of the spring 25, and the one adjacent to any cam gear 13c is rotated. The end of the vehicle control lever 23 is in frictional contact with the tertiary cam 13cf as shown in FIG.

[Rewinding Mode (see FIGS. 8, 17 and 18)]

Starting from the state shown in FIG. 7 and FIG. 13, when the drive motor 3 is driven in the forward direction, the main gear 6b turns clockwise. At this time, the secondary control lever 11 and the quaternary cam 13cg are engaged, whereby the pin 11a pivots the quick feed lever 10 toward the main gear 6b, and thus the primary quick feed gear 6ka. ) And the main gear 6b are engaged. As the primary quick feed gear 6ka and the main gear 6b are engaged, the secondary quick feed gear 6kb and the secondary reel drive gear 6i are engaged to engage the secondary reel 7b through the secondary reel gear 6j. ) Is driven at high speed, so that the rewinding of the magnetic tape T is performed.

During this rewinding of the magnetic tape T, the primary and secondary pinch rollers 17a, 17b are separated from the corresponding primary and secondary capstans 1a, 1b and installed on the head carrier arm 2 to spring The magnetic head 21 biased by the 22 is kept in contact with the portion of the magnetic tape T as in the case of the intermediate head in the stop position.

[Quick Feed Mode (see FIGS. 9, 16, 18)]

Starting in the state shown in FIGS. 7 and 13 or in the rewinding state, when the drive motor 3 drives in the forward direction, the main gear 6b is driven clockwise, and the primary quick feed gear 6ka and the main When the gear 6b is engaged, the quick feed lever 10 is turned clockwise. The secondary quick feed lever 6kb is engaged with the rack gear 11b during the pivoting movement of this quick feed lever 10, and the secondary quick feed lever 6b is engaged with the rack gear 11b and the secondary quick feed gear 6kb. The quick feed lever 10 pivots at a high speed toward the primary position where the gear 6kb is engaged with the primary reel drive gear 6g, and thus the primary reel (6h) through the primary reel gear 6h. The rapid supply of the magnetic tape T is realized by driving 7a) at high speed.

Even during this quick feed mode, the primary and secondary pinch rollers 17a, 17b are spaced apart from their primary and secondary capstans, and are provided with a magnetic head installed in the head carrier arm 20 biased by a spring 22 ( 21) is separated from the portion of the magnetic tape T as in the case of being in the stop position.

[Forward Drive Regeneration (see FIGS. 11, 14, 19)]

As described above, the cam gear 13c is positioned relative to the tertiary relay gear 13b while in one of the stop position, the rewinding mode and the quick feed mode, so that the small diameter gear 13bb is the cam gear 13c. ) Is joined to the toothless portion (13cc).

Starting from this state, when the solenoid device 13d is electrically operated to separate the plate plunger 13da from the permanent magnet, the solenoid arm 13e is fixed to the action of the pin 13ea and the secondary cam 13ce. The cam gear 13c is rotated clockwise by a slight angular distance, thereby maintaining the state as shown in FIG.

At this time, the cam gear 13c comes into contact with the gear 13bb having a small diameter, so that the driving force of the driving motor 3 in the forward direction causes the secondary and tertiary relay gears to rotate in the counterclockwise direction of the main gear 6b. The cam gear 13c is rotated clockwise by transmitting it to the cam gear 13c via 13a, 13b. In addition, as shown in FIGS. 11 and 14, the drive motor 3 is driven in the forward direction so that the cam gear 13c has a small diameter of the primary toothless portion 13ca and the tertiary relay gear 13b ( 13bb) to execute the forward drive regeneration mode.

When shifting to the forward drive regenerative mode, the primary control feed gear 6ka and the primary control lever 11 are turned once by turning the secondary control lever 11 counterclockwise from the state shown in FIG. The main gear 6b is engaged to pivot the quick feed lever 10 counterclockwise, and at the same time the primary control lever 23 is turned counterclockwise by the operation of the tertiary cam 13cf. Thus, the joining pins 23b of the primary control lever 23 are accommodated in the joining recesses 10c of the quick feed lever 10 to thereby drive the quick feed lever 10 forward as shown in FIGS. 11 and 14. Adjust to playback. By the operation of the second and fourth cams 13cg, the secondary control lever 11 moves the quick feed lever 10 in the direction in which the quick feed gear 6ka is separated from the main gear 6b. Therefore, the rotational force of the main gear 6b is not transmitted to the primary and secondary quick feed gears 6ka and 6kb without the possibility that the rotating load acts on the drive motor 3.

The control panel 13h held in the neutral position while in the stop position during the forward drive regeneration mode is moved toward the primary capstan 1a through the tertiary relay gear 13b by the operation of the primary cam 13cd, As shown in FIG. 19, the primary pinch roller arm control pin 13ha pushes the control element 16ab of the primary pinch roller arm 16a so as to push the primary pinch roller arm 17a and the primary capstan 1a. Drive contact.

At the same time, the play gear 6e and the idle gear 6f are engaged by the movement of the control panel 13h via the electric lever 13i, and the play gear 6e is formed of the primary reel drive gear 6g and the primary. The primary reel 7a is driven through the reel gear 6h to realize forward drive reproduction of information from the magnetic tape T. FIG.

At the same time as shown in FIG. 19, the control element 20b of the head carrier arm 20 is pushed by the head carrier arm control pin 13hd to spring the head carrier arm 21 with the magnetic head 21. ) Against the biasing force of the magnetic tape.

[Reverse-drive Playback (see Figs. 12, 15, 20)]

The state of the reverse drive regeneration mode of the cassette tape player is shown in Figs. 12 and 15, where the plunger of the plate from the permanent magnet is activated due to the activation of the solenoid device 13d executed during the above-mentioned forward drive regeneration state. By disengaging the 13da, the cam gear 13c and the tertiary relay gear 13b are engaged with each other, and then the drive motor 3 is driven in the forward direction from the forward drive regeneration state, so that the secondary teeth of the cam gear 13c are not provided. The small gear 13bb of the diameter of 13cb and the tertiary relay gear 13b are joined.

In this reverse drive regeneration state, by operating the primary cam 13cd, the secondary capstan 1b is moved from the position adjacent to the primary capstan 1a through the switching lever 13g while passing through the neutral position. By moving the control panel 13h toward the position adjacent to), the secondary pinch roller arm control pin 13hb pushes the control element 16bb of the secondary pinch roller arm 16b as shown in FIG. The pinch roller 17b is in drive contact with the secondary capstan 1b.

At the same time, by the movement of the control panel 13h, the play gear 6e comes into contact with the idle gear 6f via the electric lever 13i, and the play lever 9 is in contact with the secondary reel drive gear 6i. The secondary reel 7b is driven through the reel gear 6j to realize reverse drive regeneration of information from the magnetic tape T. At this time, as shown in FIG. 20, the head carrier arm 20 having the magnetic head 21 is pushed on the spring 22 by pushing the control element 20b of the head carrier arm 20 with the head carrier arm control pin 13hd. Push towards the magnetic tape section against the bias force of.

When the solenoid 13d is electrically activated during the reverse play mode, and the plate plunger 13da is released from the permanent magnet, the pin 13ea fixed by the solenoid arm 13e acts on the secondary cam 13ee and the cam gear ( By rotating 13c) clockwise by a slight angular distance, the small-diameter gear 13bb and the chem gear 13c are engaged. Therefore, while the drive motor 3 continues to drive in the forward direction, the cam gear 13 is rotated by the small diameter gear 13bb, and then the small diameter gear 13bb is the toothless portion of the cam gear 13c. It stops when it joins with (13cc). Therefore, as shown above, the secondary control lever 11 is the fourth cam 13cg while the small-diameter gear 13bb is engaged with the third toothless portion 13cc to stop the cam gear 13c. Is rotated counterclockwise so that the primary quick feed gear 6ka and the main gear 6b are engaged, the joining pin 13b of the primary control lever 23 is connected to the fastening lever 10 by the joining recess. The secondary quick feed gear 6kb does not mesh with the secondary reel drive gear 6i because it is accommodated in 10c. Therefore, unnecessary movement of the magnetic tape T can be avoided.

In the above description, the transmission gear mechanism (6) and the mode selector mechanism (13) have been described in detail, but the driving force required to operate them is the large diameter gear (5a) of the intermediate gear pulley (5) from the drive motor (3). The intermediate gear pulley (5) passes through a large diameter gear (2ba) coaxially integral with the secondary flywheel (2b) and then through the primary relay gear (6a) and finally through the main gear ( Driven by the primary endless belt 4a via 6b).

In this way the tension of the secondary endless belt 4b is transmitted by transmitting the driving force of the drive system other than the primary flywheel 2a coaxially driven and coupled coaxially with the primary capstan 1a via the intermediate gear pulley 5. Can be minimized. This is because the large diameter gear 2ba of the secondary flywheel 2b instead of the large diameter gear 5a of the intermediate gear pulley 5 and the large diameter gear 6aa of the primary relay gear 6a mesh with each other. And the driving force of the secondary flywheel 2b by the driving force of the driving motor 3 using the intermediate transmission gear 30 between the large diameter gear 6aa of the primary relay gear 6a and the intermediate transmission gear. This can be achieved by the design shown in FIG. 21 which transmits to the primary relay gear 6a via 30.

From the above description, the tape player of the present invention has a rotational force transmission mechanism for driving the tape winding reel by transmitting the rotational force of the drive motor to the transmission gear mechanism, which transmits the driving force of the drive motor to the secondary capstan. The rotational force of the intermediate gear pulley and the intermediate gear pulley with the primary endless belt that transmits to the coaxial secondary flywheel, the gear that meshes with the secondary flywheel and the coaxially configured gear is transferred to the primary flywheel coaxial with the primary capstan. It consists of a secondary endless belt that transmits. Therefore, even a belt that is loosened under tension has the same length during any one of rapid feeding and rewinding of the magnetic tape by the forward and reverse driving force of the driving motor, and minimizes the rotational load of the belt by selecting the minimum required tension. It can achieve high transmission efficiency and save energy of tape.

In addition, by adopting a design that transmits the driving force of the drive motor to the transmission gear mechanism through the intermediate gear pulley or the secondary flywheel, the load applied from the transmission gear mechanism is only the load of the belt, so the secondary belt tension is selected to the minimum value. In this way, the energy saving effect can be realized in the tape player.

Claims (4)

A primary endless belt that transmits a rotation transmission mechanism that transmits the rotational force of the drive motor to a transmission gear mechanism that rotates the tape winding reel, to a secondary flywheel that is coaxial with the secondary capstan, and 2 An intermediate gear pulley with gears meshing with the primary flywheel and a coaxial gear, and a secondary endless belt that transmits rotation of the intermediate gear pulley to the primary flywheel coaxial with the primary capstan, and these primary and secondary A drive system for a tape recording and / or reproducing apparatus, characterized in that the car endless belts are configured so as not to overlap each other in a plane. The drive system of claim 1, wherein the drive force transmits the rotational force of the drive motor to a transmission gear mechanism of either the intermediate gear pulley or the secondary flywheel. 2. The transmission gear mechanism of claim 1, wherein the transmission gear mechanism comprises a reel drive gear train of a tape winding reel anchored opposite the magnetic tape end, a cam gear drive gear for driving a mode selection cam gear, and a magnetic tape movement direction in a forward or reverse direction. A system comprising a play gear for switching to a quick feed gear and a switch for a quick feed or rewinding mode. 4. The moor selection cam gear according to claim 3, comprising a plurality of cams, operative to switch between the play gear and the quick feed gear via a lever engaged with the cam according to a selected one of the various modes to control the magnetic recording and / or playback head. And project toward the magnetic tape.