KR920006902Y1 - Operation mode selecting device of logic-type cassettee deck - Google Patents

Abstract

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Description

Logic cassette deck function mode selector

1 is a perspective view showing a schematic structure of a logic cassette deck to which the present invention is applied.

FIG. 2 is a plan view showing a part of FIG.

3 is a view showing the shape of the camp profile formed in the cam gear of Figure 2, a) is a plan view of the upper camp profile, b) is a plan view of the lower camp profile.

4 is an exploded perspective view of the idler fish assembly shown in FIG.

5 is a gear arrangement diagram of an idler gear assembly.

FIG. 6 is a schematic diagram showing a gear arrangement relationship between a revolution gear assembly and a shuttle gear assembly of FIG.

FIG. 7 is a partial plan view showing the configuration of the erasing head lever and locking lever in FIG.

8 is a schematic diagram showing an initial operating state of the cassette deck of FIG.

9 is a state diagram operated in the reverse playback mode.

10 is a state in which the fast-forward mode is operated.

* Explanation of symbols for main parts of the drawings

7: Head interlocking lever 7a: Stopping groove

7b: flow groove 11a: solenoid

12a: Upper camp profile 12: Cam gear

12a: Upper camp profile 12b: Lower camp profile

12c: central axis 13: gear assembly

17: axis 18: arm stopper

18a: one end 18b: locking projection

19: operating lever 19a: cam pin

19b: roll 23: pen drum arm

23a: long hole 23c: downward pin

23d: roll 25: solenoid lever

25a: gage ball 25b: permanent magnet

25c: camp pin 25d: locking protrusion

26: fixed shaft 133: gear support plate

133c: axis

The present invention relates to a cassette deck constituting a very small cassette tape recorder, and more particularly to a functional mode selection device of a logic cassette deck.

The mechanism provided in the cassette tape recorder is generally composed of an operation part, a mechanism part, a recording and reproducing part, a receiver part, a power supply part, and a speaker. However, a small cassette tape recorder for the convenience of carrying is a receiver part among the aforementioned mechanisms. The configuration was omitted in the early stages of the recording, the speaker, and the like.

Miniaturization of Cassette Tape Recorders In recent years, miniature cassette tape recorders have been put into practical use, with their total volume becoming small enough to fit into the user's hands. There is a growing need for a very compact cassette tape recorder.

In order to obtain a very small cassette tape recorder, there has been a trend to reduce the component parts of the mechanism, but this method has to omit some of the functions that the cassette recorder should have, such as automatic repeat or radio reception. There is a flaw.

However, recently, a method for minimizing a portable cassette tape recorder at a completely different angle has been proposed and gradually brought to practical use, and this method is a logic type cassette adopted by a high-end audio cassette deck. By applying the technique to a very small cassette tape recorder, it is intended to improve the feel during operation and to significantly reduce the volume of the mechanism.

The logic cassette deck is configured to select the function mode and perform the organic operation by the combined action of the solenoid controlling the path of the camp profile, the lever linked thereto and the lever linked along the cam diagram formed in the camp profile. It is.

According to this method, the mechanical control panel structure composed of a plurality of levers can be simplified to an electronic control panel capable of soft touch, thereby achieving a significant volume reduction effect.

However, in this kind of cassette tech, the function modes such as full backward play, green reverse recording, fast forward and rewind are selected by the movement of the lever in contact with the cam profile of the cam gear. It should be strictly separated and set, and this will cause a problem that the microcomputer process of controlling the rotation speed of the cam gear becomes very complicated.

As is well known, the design of a microcomputer requires a significant level of technology, so the cost share of this component is so high that it cannot be ignored.

An object of the present invention is to provide a functional mode selection device of a logic cassette deck in which the selective operation is performed for each function mode without the microcomputer strictly controlling the rotation speed of the cam gear in the above-described logic cassette deck.

In accordance with the above object, the present invention is a logic cassette technology in which the function mode is selected by the movement of the lever in contact with the camp profile of the cam gear, the end portion of the upper cam profile in the outer cam diagram to interlock By means of an arm stopper on which the locking projection on the opposite side swings to control the position of the head interlocking lever, and an actuating lever on which the roll on the opposite side swings on the inside of the flow groove by a cam pin interlocking on the inner cam diagram of the lower camp profile. The solenoid lever, which has been transferred by the solenoid, is moved by sliding the moving head interlocking lever, and the solenoid lever, which has been transferred by the solenoid, is selected by the solenoid lever. The lever of the lever acts as the cam pin of the actuating lever. Select and follow the function-specific mode path defined by the inner cam profile of the side camp profile, and slide one side of the pendulum arm connected to the shaft of the gear assembly to the central axis of the cam gear. Between the cam gear and the cam drive gear until the restraining force exerted on the shaft of the gear support pin is released through the pen drum arm in this inner cam diagram by contacting the inner cam diagram of the upper camp profile. It is characterized in that the tooth connection of the lasting.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a schematic structure of a logic cassette deck to which the present invention is applied. The chassis 1 includes a drive motor 2, a pair of flywheels 3 and 4, and these flywheels 3; The gear pulley 6 receives the driving force through the belt 5 wound around the belt 4.

The upper surface of the chassis 1 has a head interlock lever 7 for controlling the position of the play head for each function mode selected by the user, and the play head 8 is centered on the rear side of the chassis 1 facing the play head. The erase heads 9a and 9b and the pinch rollers 10a and 10b are provided on both sides thereof.

Solenoids 11a and 11b that are energized only at predetermined times are provided near both sides of the head interlock lever 7.

FIG. 2 shows a plan view of the stop mode with the flywheels 3 and 4 and gear pulley 6 removed in FIG.

The cam gear 12 is disposed opposite the drive motor 2, and the idler gear assembly 13 is located therebetween.

The cam gear 12 has upper and lower camp profiles 12a and 12b, respectively, as shown in FIG.

The upper camp profile 12a has protrusions 120a and 120b symmetrical with each other about the starting point Sa and the arrival point Ta, the primary large circumferential surfaces 121a and 121b, and the small diameter circumferential surface 122a. 122b, and an outer cam diagram formed by the secondary large raceways 123a and 123b, and an inner cam diagram leading to the starting point Sb and the arrival point Tb around the central cam 124 in the center. The center cam 124 described above has a trap 124a near the arrival point Tb.

The lower camp profile 12b also has an outer cam diagram and an inner cam diagram. However, unlike the upper camp profile 12a, the outer cam profile 12b extends outside the isolation wall 120c at the starting point Sc. The reverse path leading to the arrival point Tc1 on the ride, and the forward path leading to the arrival point T2 from the starting point S3 and the inside of the isolation wall 120c at the starting point S3. Is divided into a fast forward route from the rewinding path reaching the arrival point Tc3 and the starting point S3 to the arrival point Tc4 on the outside of the guide wall l21c, and the inner cam diagram is also the starting point ( A reverse path from Sd to the arrival point Td on the inner side of the obstacle 122c, a forward path from the starting point Sd to the arrival point Td on the outside of the obstacle 123c, and a starting point Sd. ) To the fast forward route and the starting point (Sd) from the inside of the obstacle (123c) to the arrival point (Td) On the outside of the obstacle 122c, the arrival point Td is divided into rewind paths.

Between the drive motor 2 and the cam gear 12 shown in FIG. 2, a pair of left and right driven gears 14 and 15 are opposed to the idler gear assembly 13, and The stabilizer 16 is provided on the opposite side of both driven gears 14 and 15 which are centered around the idler gear assembly 13.

Further, an arm stopper 18 and an actuating lever 19 coaxially supported by the extended shaft 17 are linked to the head interlock lever 7.

When explaining these linkage structures, the arm stopper 18 contacts the one end portion 18a to the outer cam diagram of the upper camp profile 12a as described above, and simultaneously connects the other end engaging projections 18b to the head linkages. It engages with the stopper groove 7 of the lever 7, and the actuating lever 19 contacts and connects the one end cam pin 19a to the inner cam diagram of the lower camp profile 12b, and the other end roll 19b. ) Is engaged with the flow groove 7b of the head interlock lever 7.

The above-described idler gear assembly 13 is engaged with the drive gear 6a formed integrally with the bottom of the gear pulley 6 so as to receive power of the drive motor 2, and the cam drive gear ( 130, an idler gear 131, a pen drum gear 132, and a gear support plate 133 for supporting these gears to a predetermined position.

Figure 4 is an exploded perspective view showing in more detail the configuration of the above-described idler fish assembly.

The cam drive gear 130 is rotatably inserted and supported by a gear shaft 133a standing up around the gear support plate 133, and the idler gear 131 is a gear support plate 133 via a slip washer 134. It is arranged coaxially to the central shaft hole (133b) of the () and is rotatably supported on the fixed shaft 20 extending from the chassis (1), the pen drum gear 132 is interposed through the clutch spring 135 To the shaft 133c of the gear support plate 133.

The reciprocating gear 131 is a double gear that is divided into a large diameter gear 131a and a small diameter gear 131b in the upper and lower sides, and the pendulum gear 132 also has a large diameter gear 132a and a small diameter in the same direction. It becomes a double gear which forms the gear 132b.

The small gear 132b of the cam drive gear 130 and the pan drum gear 132 is engaged with the large gear 131a of the idle gear 131 as shown in FIG. 5. While the cam drive gear 130 is geared to the outer circumference of the cam gear 12, the large diameter gear 132a of the pen drum gear 132 is placed between the left and right driven gears 14 and 15. Is placed.

On the other hand, both driven gears 14 and 15 are also double gears formed of large-size gears 14a and 15a and small-size gears 14b and 15b, respectively, of which the large-size gears 14a and 15a are second. The left reel gear 21 and the right reel gear 22 shown by the dashed-dotted line in the figure are respectively permanently engaged.

By such a gear arrangement, the cam gear 12 is a drive motor (2) transmitted along the path leading to the drive gear (6a), the large-diameter gear (131a) of the idler gear 131, cam cam gear 130. It is rotated by the driving force of).

The rotational force of the idler gear 131 is also transmitted to the gear support plate 133 via the slip washer 134, so that the pen drum gear 132 pivots according to the rotational direction of the idler gear 131. At the same time as being engaged with any one of (14) and (15), the cam gear 12 and the cam drive gear 130 are interrupted so that the rotation of the cam gear 12 is stopped.

However, the turning of the pendulum gear 132 is not always possible and is controlled by the pendulum arm 23 connected to the shaft 133c supporting the pendulum gear 132 as shown in FIG. have.

That is, the pendulum arm 23 extends long and engages the long hole 23a formed in the middle portion thereof with the central axis 12c of the cam gear 12, and the fork 23b formed at one side end of the chassis 1 The lower pin 23c, which is arranged on the guide pin 24 extending from the back and slides in the longitudinal direction and is held on the side of the above-mentioned long hole C3a, is located inside the upper camp profile 12a. By interlocking with the cam diagram, the suppression force transmitted through the deflecting pin 23c in contact with the inner cam diagram is applied to the shaft 133c of the idler gear assembly 13 via the pendulum arm 23, It is possible to restrain the movement of the gear support plate 133 integrally connected with the shaft 133c, and the linkage groove 25a of the solenoid lever 25 is provided with an interlocking pin 23d provided on the opposite side of the fork 23b. I am engaging in.

The solenoid lever 25 has a permanent magnet 25b adsorbed to the solenoid 11a as described above, and is arranged to be oscillated with the shaft 26 as a point, and the lower camp profile 12b. The cam pin 25c which is contact-interlocked with the outer cam diagram of this, and the protrusion 25d which touch-interfers on one side of the operation lever 19 mentioned above are hold | maintained.

On the other hand, the stabilizer 16 disposed around the idler gear assembly 13 has a shuttle arm 161 having guide grooves 160 on both sides, as shown in FIG. 6, and the shuttle arm 161. A pair of shuttle gears 162 which are installed at both ends of the idle gear 131b of the idler gear 131 and protrude on one side of the upper surface of the shuttle arm 161, so that It consists of the locking pin 163 which engages with the restraint path 7c.

The guide groove 160 is guided by a guide pin 27 fixed to the chassis 1 to regulate the shuttle arm 161 to reciprocate on the outer circumference of the idler gear 131 in a predetermined trajectory. give.

The shuttle arm 161 is locked when the locking pin 163 is engaged with the restraint passage 7c. However, the aforementioned restraint passage 7c has a symmetrically extended release groove 7d at both sides thereof. When the head interlock lever 7 slides in communication with 7e, the locking pin 163 is positioned on either side of the release grooves 7d and 7e to release the restraint on the shuttle arm 161. As a result, the shuttle arm 161 may be pivoted on the idler gear 131.

The head interlocking lever 7 shown in FIG. 2 has a lifting groove 7f on the side of the flow groove 7b, and the lifting roll 8a for interlocking the regenerative head 8 in the lifting groove 7f. ) Is engaged.

Further, interlocking pins 7g and 7h for interlocking the pinch rollers 10a and 10b described above are provided downward at both ends of the lower side of the head interlock lever 7.

Between the chassis 1 and the head interlocking lever 7, an erasing head lever 28 for interlocking the above-mentioned erasing heads 9a and 9b is disposed, and the erasing head lever 28 is disposed on the solenoid 11b. The locking lever 29 sucked by the lock locks the head interlock lever 7 by interlocking the latch 30, so that the locking lever 29 is able to move on the slide movement of the head interlock lever 7.

The locking lever 29 has a permanent magnet 29a adsorbed by the solenoid 11b.

FIG. 7 is a diagram showing a linkage structure between the head interlock lever 7 and the erasing head lever 28. As shown in FIG.

The locking lever 29 is rotatably supported on the shaft 31 fixed to the chassis 1, and extends one end portion 29b inward of the stopper groove 7a formed in the head interlock lever 7, In addition, the tension spring (29c) is provided on the other end side so that the permanent magnet (29a) is always replaced with a predetermined interval with respect to the solenoid (11b).

The locking lever 29 provided to rotate the shaft 31 to the point extends one end portion 29b of the locking lever 7a of the head interlocking lever 7 to one side of the arm stopper 18 described above. It faces the locking projection 18b standing up at the end, and the slide groove 29d is formed long in the one end part 29b mentioned above.

The latch 30 has a slide pin 30a engaged with the slide groove 29d of the locking lever 29, and an upward protrusion 30b and a downward protrusion 30c protruding in opposite directions on the upper and lower sides thereof. And is swingably mounted on the erasing head 28.

When the locking lever 29 is attracted to the solenoid 11b, the latch 30 is interlocked with the locking lever 29 to engage the upward protrusion 30b with the latch groove 70a of the stopping groove 7a and downward. As the 30c comes out of the locking groove (not shown) which is drilled in the chassis 1, the erasing head lever 28 can be integrally locked to the head interlock lever 7 so that it can be piggybacked.

The erasing head lever 28 has engaging grooves 28a and 28b for interlocking the above-described two erasing heads 9a and 9b, respectively, so that when the slide head is moved together with the head interlock lever 7 in the recording mode. In accordance with the advancing direction, any one of them is in contact with the tape.

The cassette deck configured as described above is operated in six modes such as full backward playback, full backward recording, and fast forward and rewind.

When the motor enters the forward mode or the fast forward mode in the stop state of FIG. Rotating (counterclockwise) and the idler gear 131 and the cam gear 12 is rotated forward, in the reverse mode or rewind mode is rotated as opposed to the above.

When the rotation of the idler gear 131 starts, the rotational force is also transmitted to the gear support plate 133 so that the gear support plate 133 is turned toward the right driven gear 15 at the forward rotation and vice versa at the reverse rotation. While attempting to pivot the pen drum gear 132 toward the left driven gear 14, the lower pin 23c of the pen drum arm 23 connected to the shaft 133c of the gear support plate 133 is the upper camp profile. Since the position restriction is restricted by the inner cam diagram of (12a), the slip washer 134 interposed between the idler gear 131 and the gear support plate 133 is fixed in a state of absorbing rotational force. Time is maintained, during which the cam gear 12 is rotated.

Looking at the cam action by the upper and lower camp profiles 12a and 12b of the cam gear 12, one end 18a of the arm stopper 18, which rides the outer cam diagram of the upper camp profile 12a, is taken. ) Is in contact with either side of the second large raceway surface 123a or 123b, the rocking protrusion 18a on the opposite side is rocked to remove the engagement between the stoppering groove 7a and the locking protrusion 18a, thereby interlocking the head. The downward pin 23c of the pendulum arm 23, which releases the lever 7 and at the same time rides the inner cam diagram, reaches the arrival point Tb and coincides with the trap 124a.

In addition, the reverse, fast forward and rewind modes of the cam pin 19a of the actuating lever 19 to ride the inner cam diagram and the cam pin 25c of the solenoid lever 25 to ride the outer cam diagram from the lower camp profile 12b. The solenoid 11a, which is energized only at, is followed by the mode path for the selected mode.

Since the rotation of the cam gear 12 rotates clockwise in the forward mode and counterclockwise in the reverse mode, the example shown in FIG. 8 shows a state of entering the reverse mode.

The arm stopper 18 swings the shaft 17 to a point as its one end 18a is interlocked by the protrusion 120b which forms the outer cam diagram of the upper camp profile 12a. The locking projections 18b formed at the other end of the arm stopper 18 come out of the stopping groove 7a and interfere with one end 29bb of the locking lever 29, so that the locking lever 29 is also shafted. Rotate (31) to the point.

As a result, the permanent magnet 29a of the locking lever 29 comes into close contact with the solenoid 11b, and the latch 30 locks the erasing head lever 28 to the head interlock lever 7 integrally.

Here, in the reverse recording mode, the solenoid 11b is energized and the permanent magnet 29a is kept in close contact even when the locking projection 18b of the stopper 18 releases the locking lever 29. The erasing head lever 28 remains piggybacked on the head interlock lever 7. In the reverse regeneration mode, the solenoid 11b is not energized and applied to one end 29b of the locking lever 29. When the pressure of the retaining protrusion 18b disappears, the locking lever 29 returns to its original position by the restoring force of the tension spring 29c, and the head interlock lever 7 and the erasing head lever 28 move independently. .

When the one end 18a of the arm stopper 18 reaches the secondary large raceway surface 123b through the protrusion 120b of the upper camp profile 12a shown in FIG. The cam pin 19a of 19) also follows the reverse path which forms the inner cam line diagram of the lower camp profile 12b shown in FIG. 3 b), and the camp pin 19a posted in this reverse path is the obstacle 122c. The solenoid 11a adsorbs the permanent magnet 25b of the solenoid lever 25 and swings before the inner surface of the crankshaft, so that the operating lever 19 is interlocked by the projection 25d of the solenoid lever 25. Since the cam pin 19a at one end thereof is directed toward the center side, the cam pin 19a is moved to the center side of the cam gear 12 on the inner surface of the obstacle 122c, so the other end roll 19b is moved to the right in the drawing. The head interlocking lever 7 is moved through the flow groove 7b while being greatly interlocked.

When the cam pin 19a of the actuating lever 19 rides the forward path forming the inner cam diagram of the lower camp profile 12b in the forward mode, the solenoid 11a is not energized so the cam pin 19a is By riding the outer surface of the obstacle 123, the other end roll 19b is moved to the left side in the drawing to move the head interlocking lever (7).

Such slide movement of the head interlock lever 7 causes the stabilizer 16 to be released, and in the reverse mode, as illustrated in FIG. 9, the shuttle gear 162 guides due to the release of the stabilizer 16. The guide pins 27 engaged with the grooves 160 are swiveled around the idler gear 131 to the allowable range, and engaged with the right reel gear 22 to achieve constant speed driving and to the upper camp. The inner cam formed on the outer circumference of the central cam 124 when the downward pin 23c of the pendulum arm 23 that interlocks with the inner cam diagram of the pile 12a matches the trap 124a of the central cam 124. Since the restraining force applied to the gear support plate 133 of the idler gear assembly 13 is released from the diagram via the pendulum arm 23, the gear support plate 133 is the pendulum arm 23 by the rotational force of the idler gear 131. Turn the pendulum gear (132) to the left driven gear (14). The driving of the recording tape is started by being engaged with each other, and the cam drive gear 130 is separated from the cam gear 12 so that the rotation of the cam gear 12 is stopped, thereby continuing the reverse mode.

At this point, the engaging projection 18b of the arm stopper 18 is engaged with the stopping groove 7a again to restrain the head interlocking lever 7 and regenerates through the elevating groove 7f of the head interlocking lever 7. The head 8 is moved to contact the recording tape.

In the forward mode, the revolving gear 131 rotates forward so that the gear support plate 133 pivots the pendulum gear 132 toward the right driven gear 15. As a result, the pendulum arm near the end of rotation of the cam gear 12 is almost complete. As the downward pin 23c of the 23 is coincided with the arrival point Ta of the upper camp profile 12a and exits therefrom, the restraining force on the movement of the gear support plate 133 is released, so that the pendulum gear 132 ) Is engaged with the right driven gear 15.

In fast forward mode, the cam pin 19a of the actuating lever 19 rides on the inner side of the obstacle 123c at the starting point Sd of the lower camp profile 12b shown in FIG. As soon as the winding route to reach the), the operating lever 19 is not significantly shaken.

Therefore, in the fast forward mode, as shown in FIG. 10, the sliding movement of the head interlocking lever 7 is not performed, and only the pen drum gear 132 is engaged with the right driven gear 15, so that the right reel gear 22 Will only follow).

In the rewind mode, only the drum drum 132 is engaged only with the left driven gear 14, and the rest operates in the same manner so that the driven reel of the left reel gear 21 is made.

As described above, the present invention oscillates the solenoid lever by the organic interlocking operation of the arm stopper, the operating lever, the pendulum arm, and the solenoid lever in contact with the camp profile formed on the upper and lower surfaces of the cam gear. Since it can be selected depending on whether or not the solenoid is energized, the process can be simplified and the structure can be made compact. Therefore, it has practicality suitable for a micro cassette technology.

Claims (1)

In a logic cassette deck in which a function mode is selected by the movement of a lever in contact with a camp profile of a cam gear, the one end 18a interlocks by riding an outer cam diagram of the upper camp profile 12a. The cam stopper 19a which controls the position of the head interlocking lever 7 with the arm stopper 18 by which the engaging projection 18b of the opposite side is rocked | pulled, and interlocks by riding the inner cam diagram of the lower camp profile 12b is carried out. The roll 19b on the opposite side slides the head interlock lever 7 transferred to the actuating lever 19, which is oscillated inside the flow groove 7b, and the lower side of the solenoid lever 25 that the cam pin 25c posts. The solenoid lever 25 delivered by the solenoid 11a is attracted and swinged so that the outer cam diagram of the camp profile 12b can be selected and followed, and the other end side is caused by the swing of the solenoid lever 25. The actuating lever 19 opened by the engaging projection 25d is opened. And the cam pin 19a of the actuating lever 19 selects and follows a function-specific mode path defined by the inner cam diagram of the lower camp profile 12b, and one side of the shaft assembly 133c of the gear assembly 13. The middle side hole 23a of the pendulum arm 23 connected to the slideable slidably engages the central axis 12c of the cam gear 12, and the downward pin 23c provided on the side of the long hole 23a is electrically connected. In contact with the inner cam diagram of the upper camp profile 12a, it is generated in this inner cam diagram and applied to the shaft 133c of the gear support plate 133 via the pen drum arm 23 to the cam gear 12. A function mode selector of a logic cassette deck for keeping the gear connection between the cam drive gear 130 continuous.