JPH048503Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Industrial Field of Application) The present invention relates to a small tape recorder, and more particularly, to a small tape recorder such as a portable dictation type recorder/player suitable for recording and reproducing messages. (Prior Art) In recent years, so-called dictation recorders (hereinafter referred to simply as dictation machines) are used to play back a message recorded by a boss, such as a business sentence, and allow a secretary or the like to type it into a document while listening to it. Small tape recorders such as tape recorders (called "recorders") are increasingly being used in business. There are two types of dictation recorders of this kind: a stationary type that is placed on a desk and a portable type that is used as a portable device. In the former case, a normal audio tape cassette is generally used, and in the latter case, a so-called microcassette, which is about 1/4 the size of the above-mentioned tape cassette, is generally used. When these small dictation type tape recorders are used, generally, once a recorded message has been played back, all recorded information is often erased in order to maintain the confidentiality of the message contents. (Problem to be solved by the invention) In addition, in general tape recorders such as the above-mentioned microcassette, the lid is locked by the locking member of the device in the Play state such as during recording/playback. It is impossible to enter the Play state when the body is open. In addition, in the case of an apparatus that allows the Play operation with the lid in the open state, there is a drawback that the lid cannot be locked in the Play state. (Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and is a tape cassette mounting device having locking portions 9a' and 9b' on one side on which a tape cassette is placed. Placement part 24a
A rotatable lid body 2 that opens and closes the lid, a slidable slide base 39 that is equipped with a magnetic head 40 and a pinch roller 41 and moves forward and backward by a drive mechanism, and a rotational force is applied by an elastic means. The rotational position of the object is restricted, and one end is connected to the locking part 9.
It consists of rotatable lock members 52 and 53 whose other ends are faced so as to be able to engage with one end of the slide base 39, and the lock member 52 , 53, the other end rotates against the elastic means when in contact with the slide base when the slide base 39 moves forward in the closed state of the lid body, The one end portion engages with the locking portions 9a' and 9b' of the lid body 2 to lock the lid body, and is rotated to a locked position when the slide base is operated in an open state of the lid body. The locking portion 9 is closed by the closing operation of the lid of the object.
The end portions of a' and 9b' are forcibly rotated against the elastic means and temporarily retracted from the lock position to allow the lid to close. The present invention provides a compact tape recorder with (Embodiment) FIG. 1 is a plan view showing the structure of a mechanical section of a small tape recorder according to the present invention. Figures 2A and B are a front view and a partial side view of a small tape recorder;
FIG. 3C is a perspective view of the back side showing a state in which the lid of the tape cassette insertion section is opened, and FIG. Same figure A
1 is an external perspective view, and FIG. 1B is a plan view showing a state with the upper half removed. As shown in FIGS. 2A to 2C, the small tape recorder main body S is composed of a body part 1 and a substantially U-shaped lid body 2 rotatably supported on the body part 1. The small tape cassette A is loaded horizontally from the direction indicated by arrow P with the lid 2 on the back turned upward approximately 90 degrees in an open state. At the top of the top surface (operation surface) 1a of the fuselage section 1, as shown in FIGS. 3
At the bottom of the screen, there are provided operation buttons 4 for operating various modes such as record, rewind/play, and stop. The operation buttons 4 are composed of, for example, a pair of operation button groups 4a and 4b arranged in two rows above and below, and in the center of each row there is a record button (Record) 5, which is the main operation button. Reverse/Play buttons 6, power button, etc. are arranged facing each other, and these main operation buttons 5,
As shown in FIG. 6A, the button 6 is larger than the other operation buttons. As shown in FIG.
A trough-shaped space is formed by this. Therefore, the main operation buttons, such as the record button 5 and the rewind/play button 6, are placed in the center of the operation section, and they are made larger than the other operation buttons, and the buttons are placed in each row. By changing the shape of the dictation recorder, it is possible to switch to each operation mode without constantly looking at each operation button during the frequently used recording/playback mode, making it very easy to use as a dictation recorder. In addition, as shown in FIG.
A plate-shaped cassette pressing member 7 projecting to the side is attached, and by closing the lid body 2,
A pair of elastic arms 7a and 7b press the loaded small tape cassette A from above to restrict vertical movement within the device. Inside the side walls 2a and 2b of the lid body 2, there are a pair of plate-shaped locking parts 9 provided with cutouts 9a' and 9b' on the side of the opening 8.
a, 9b are fixedly installed, and when recording and reproducing with the lid 2 closed, the locking members 9a, 9b are locked to lock arms 52, 53 that cooperate with a slide base 39 in the device, which will be described later. This prevents the lid body 2 from being opened. On the other hand, the main body 20 of the small tape cassette A has an upper half 10 and a lower half 1, as shown in FIGS. 3A and 3B.
1 are combined at their engaging portions 10a, 11a, and have a rectangular shape with flat upper and lower surfaces, and one side thereof is open. This is approximately the same shape as a normal tape cassette, and its width a is approximately 35 mm.
mm, depth b is 25 mm, and thickness c is 4 mm, which is approximately 1/3 the size of a commonly used microtape cassette. In the opening 12 of the small tape cassette A, a magnetic head 40 of a device to be described later is located at a position substantially opposite to a pair of tape reels 13 and 14 disposed inside.
Introducing portions 15 and 16 are formed to allow the entry of the tape guide portion 46 of the magnetic head 40, and a pair of upper and lower thin portions 15a are formed on both sides of the introducing portions 15 and 16 to allow the tape guide portion 46 of the magnetic head 40 to enter. ,15
b, 16a, 16b are formed. Furthermore, a tapered notch 21c that allows the entry of a pinch roller 41, which will be described later, is vertically formed approximately in the middle of the introduction parts 15 and 16 of the opening 12, and a tapered notch 21c, which will be described later, is formed on the back of the notch 21c. Capstan 37
A pair of through holes 21a and 21b are formed to allow the entry of. Note that 17a and 17b are a pair of tape pads, which are elastically supported by a leaf spring 18 and press the magnetic tape 19 from the back inside the introduction portions 15 and 16. 22a, 22b are guide poles, 23a, 23
The magnetic tape 19 is guided by guide rollers b, bypasses the opening 12, and is wound around the tape reels 13 and 14. Further, a pair of notches 20a and 20b are formed at both ends on the side of the opening 12, and these notches 20a and 20b function for positioning when the small tape cassette A is loaded into the device. It is. As shown in Fig. 1, the mechanical section K of the compact tape recorder has a cassette reel drive section B, a slide base section C equipped with a magnetic head, a pinch roller, etc., a slide base drive mechanism D that drives the slide base section C, and a slide base drive mechanism D that drives the slide base section C. These components are generally configured on a chassis base 24. The cassette reel drive section B includes a pair of reel hub shafts 25 and 26 on the supply side and take-up side, and a reel hub drive section 27. The reel hub shafts 25 and 26 are driven to rotate in both forward and reverse directions by a pair of pulleys 28 and 29 arranged on the lower side of the chassis base 24, respectively. The details of the drive system of the reel hub drive unit 27 will be explained in conjunction with FIG. 4. A pulley 30 having a flywheel 30a is rotationally driven by a capstan drive motor (first drive source) M1 that can rotate in forward and reverse directions. is connected to the first stage pulley 3 via the belt 31.
2 to rotate. The rotation of the pulley 32 is transmitted from a small diameter pulley 33 integrated therewith via a belt 34 to a large diameter second stage pulley 35 which also serves as a flywheel and has a capstan 37.
A belt 38 is stretched across a small diameter pulley 36 integrated with this pulley 35 so as to simultaneously drive the pulleys 28 and 29 of the reel hub shafts 25 and 26 at reduced speed. On the other hand, as shown in FIG. 1, the slide base portion C includes a slide base 39 formed into a substantially T-shape by a protrusion 39b protruding from a base portion 39a, and a magnetic head 40 and a pinch roller 41 mounted on the slide base 39. It is more roughly structured. The slide base 39 has elongated holes 39 connected to pins 42 and 43 which are provided upright on the chassis base 24 at both ends of its base 39a.
a' and 39a'' are guided, and the elongated hole 39b' formed in the longitudinal direction of the protrusion _39b is guided and regulated by a pin 44 provided upright on the chassis base 24 _. The magnetic head 4 is fixed to the slide base 39.
0 is elastically supported by a coil spring 45, and the azimuth can be adjusted. Reference numeral 46 designates a pair of U-shaped tape guide portions provided at both ends of the magnetic head 40, and these are the guide portions 15a, 15b, 16a, 16b of the small tape cassette A shown in FIGS. 3A and 3B above. The magnetic tape 19 enters into the tape cassette A and regulates the vertical position of the magnetic tape 19 within the tape cassette A. Reference numeral 47 designates an arm portion that is rotatably supported at one end by a shaft 48 erected on the slide base 39, and a pinch roller 41 is rotatably supported at the other end. Further, reference numeral 49 denotes a coil spring wound α so as to be inserted into the rotation shaft 48 of the arm portion 47. One end of this coil spring is locked to the slide base 39, and the other end is locked to the rotation shaft 48 of the arm portion 47. Stop part 47
a, which forces the pinch roller 41 toward the capstan 37 and applies rotational force clockwise, but the hanging pin (not shown) of the arm 47 contacts one end of the slide base 39 and rotates movement position is regulated. Reference numerals 50 and 51 designate a pair of coil springs stretched between both ends of the slide base 39 and the chassis base _24.
(Play) direction, and when the slide base drive mechanism D (described later) is driven in the forward direction, the slide base 39 is moved by its elastic force in accordance with the rotational position of the cam of the cam switch mechanism. It functions to draw the small tape cassette toward A side. Here, the lid body 2 constituting a part of the main part of the present invention
The locking mechanism will be explained with reference to FIGS. 15 and 16. Reference numerals 52 and 53 designate a pair of locking members disposed close to the slide base 39 side at the tape cassette mounting portion 24a of the chassis base 24, one end of which faces one side of the slide base 39 so as to be able to come into contact with the other. With the other end facing into the side walls 24b, 24c of the chassis base 24 so as to be able to move forward and backward,
It is rotatably supported on shafts 54 and 55. The other ends of the lock members 52 and 53 are connected to the side wall 24.
b, 24c are biased inwardly by elastic means such as coil springs (not shown), as shown by arrows in FIG. 15, but one side is locked to the side walls 24b, 24c. The rotation position is regulated. Therefore, when recording/reproducing with the lid 2 closed, the slide base 39 moves in the _X1 direction, so that one end of the locking members 52, 53 becomes part of the slide base 39, as shown in FIG. 16A. These are rotated outwardly about the shafts 54 and 55 as shown in FIG. 16B, and the notch (locking portion) 9a' of the lid body 2 shown in FIGS. 2 and 15 , 9b' and this cover body 2
By locking the lid, the opening operation is prevented. Further, when the lid 2 is closed after recording/reproducing with the lid 2 open, the locking members 52 and 53 are engaged with the locking portions 9a and 9b of the lid 2, as shown in FIG. 16C.
The locking members 52 and 53 are forcibly rotated against the elastic force of the coil spring as shown by the two-dot chain line, and are temporarily retracted from the locking position to allow the lid to close. When the lid is completely closed, the lid 2 enters the notches 9a' and 9b', as shown in FIG. 2B, and the lid 2 is securely locked. In this way, the locking members 52 and 53 can lock the lid 2 even in the play state, so that the operating state of the attached tape cassette can be checked even in a lid without a window, for example. Note that 63 is a switch section that operates the amplifier of the device as the slide base 39 moves. The slide base drive section D is disposed behind the slide base 39, and its specific configuration will be explained in conjunction with FIG. 5. Slide base 39
The rotational force of an output gear 56 fixed to the shaft of a motor (second drive source) M2 that controls the position of is transmitted to a gear 57 serving as an intermediate gear, and rotationally drives a gear 58 integrated with this gear 57. The rotational force of the gear 58 is transmitted to a gear 60 having a worm gear 60, and decelerates the worm wheel 61 that meshes with the worm gear 60. A cam switch unit (cam switch mechanism), which will be described later, is removably attached to the shaft 62 of the worm wheel 61. Here, the structure and specific operation of each part of the small cassette recorder according to the present invention will be explained item by item. () One-way clutch mechanism (see FIGS. 6 to 8) The one-way clutch mechanisms CL ₁ and CL ₂ are inserted between the reel hub shafts 25 and 26 and the drive pulleys 28 and 29, respectively, and the first In FIGS. 3 and 3, when the magnetic tape runs in the _Q1 direction (Play), the one-way clutch _CL2 on the reel hub shaft 26 operates.
Also, reverse rotation (Rew) where the magnetic tape runs in the _Q2 direction.
Sometimes other clutches CL ₁ are set to operate in different rotational directions. As shown in FIG. 6, the one-way clutch mechanism CL ₁ of the reel hub shaft 25 on the supply side has a shaft 65 rotatably supported by a sleeve 64 fixed to the chassis base 24. The reel hub shaft 25 is attached to the upper part via the reel 64, and a ratchet cam 66, a cam plate 70, etc. having a shape as shown in the rear view of FIG. 8 are fixed to the lower part. A coil spring 68 is inserted between the sleeve 64 and the reel hub shaft 25 via a support plate 67 fixed to the shaft 65. The above-mentioned pulley 28 is rotatably supported on the boss portion 64a of the sleeve 64, and the boss portion 64a is rotatably supported.
A cam plate 70 having a shape as shown in FIG. 8 is rotatably attached to the cam plate 4a via a hub 69 fixed to the cam plate 4a. A pressing force is constantly applied to the cam plate 70 by a coil spring 71 inserted between the cam plate 70 and the boss portion 64a so that one side of the cam plate 70 is frictionally joined to one side of the pulley 28. Here, the pulley 28, the latch cam 66, and the cam plate 70, which constitute the main parts of the one-way latch _CL1 .
The relationship between the two will be explained in conjunction with FIG. Pulley 28
A pin 72, which is hung down from the lower part of the cam 66, is rotatably supported by a latchet 73 that can be engaged with a plurality of engaging portions 66a formed on the latchet cam 66. The cam pin 74 on the ratchet 73 is guided in a groove 70a formed in an arc shape from the outer circumference to the inner circumference of the cam plate 70. When the pulley 28 is rotated clockwise as shown by the arrow, the cam pin 7
4 is guided by the groove 70a, and the ratchet 73 is moved toward the ratchet cam 66 side as shown by the two-dot chain line.
The reel hub 25 is rotated clockwise (towards the center) and engaged with one engaging portion 66a of the ratchet cam 66, thereby rotationally driving the reel hub 25. Also, during PLAY when the pulley 28 rotates counterclockwise, first the cam pin 74 of the ratchet 73
is forcibly moved outward within the groove 70a of the cam plate 70 as shown by the solid line, and this movement of the cam pin 74 causes the latch 73 to rotate counterclockwise with respect to the pin 72, causing the latch 73 and the latch cam 66 to rotate. Since the reel hub shaft 25 is disengaged from the reel hub shaft 25, the rotational force is cut off and the reel hub shaft 25 becomes free. On the other hand, the reel hub shaft 26 on the winding side is equipped with a well-known friction clutch CL and the reel hub shaft 26.
A one-way clutch CL ₂ having substantially the same construction as the one-way clutch CL ₁ of No. 5 is provided. one way clutch
Since the operating direction of CL ₂ is opposite to that of the other one-way clutch CL ₁ as described above, the mode is opposite to that of the ratchet cam 66, cam plate 70 and ratchet 73 shown in FIG. Therefore, this seventh
In the figure, the same parts as in FIG. 6 are denoted by the same reference numerals, and detailed explanation thereof will be omitted. In FIG. 7, a friction clutch CL of a known structure is inserted between the support plate 67 on the sleeve 64 and the reel hub shaft 26 to control the winding torque. That is, an auxiliary plate 75 to which a friction plate 76 is adhered is fixed on the support plate 67, and this friction plate 76
A coil spring 77 is inserted between the coil spring 77 and the reel hub shaft 26 on one side thereof, and a plate 78 that is engaged with the coil spring 77 is friction-welded. Therefore, when the magnetic tape 19 fed out in the _Q1 direction by the capstan 37 and the pinch roller 41 is wound onto the take-up tape reel, the rotational torque of the pulley 29 is controlled to maintain a constant tape tension. This makes it possible to wind up the tape with a thread, thereby preventing damage to the tape. Now, let's consider a case where the present drive mechanism employs a well-known one-way clutch with a simple structure between the drive pulley 28 and the reel hub 25.
During Play, that is, the pulley 28 is set to the ratchet cam 6.
There is no problem when the magnetic tape 19 wound on the tape reel is rotated faster than 6 (driven side) during fast forwarding (FF) and rewinding (Rew). After passing the point,
Since the supply tape reel is thinner than the take-up tape reel, it is rotated faster. Therefore, due to the high speed rotation of the supply tape reel, a sticking phenomenon occurs between the ratchet cam 66 and the cam pin 74. As a result, a new back tension is applied in addition to the normal back tension acting on the supply tape reel, causing damage to the magnetic tape 19. That is, if the new back tension is T _B , the following relationship holds true. Here, T: driving torque, R _D : driving side winding radius, RS: supply side winding radius, r: reel hub radius, t: tape thickness, L: tape length (total length). A cam plate 70 employed in the one-way clutch mechanism holds down this back tension T _B. As in the above configuration, the cam plate 70 is always pressed against the stationary sleeve 64 toward the pulley 28 by the coil spring 71 and is in frictional contact with it, so due to this friction it always starts rotating one tempo later than the pulley 29. . In other words, when the pulley 28 on the driving side rotates clockwise in FIG.
After rotating along the groove 70a of the cam plate 70,
First, the end of the groove 70a is locked and the cam plate 70 is moved temporally to be carried along. At the same timing, the cam pin of the one-way clutch _CL2 of the driven pulley 29 is forcibly moved outward along the groove of the cam plate, and the engagement between the ratchet and the ratchet cam is released. After that, the ratchet 73 of the driving pulley 28 is connected to the ratchet cam 66.
When the engaging portion 66a of the reel hub shaft 25 is locked and the reel hub shaft 25 is rotated, and one one-way clutch is always operating, the other one-way clutch is reliably inactive and the FF, Rew At the same time, it is possible to prevent the generation of back tension that always acts on the tape in any direction of rotation. () Cam switch mechanism (see FIGS. 9 and 10) As shown in the exploded perspective view of FIG.
A cam 80 of a predetermined shape is rotatably attached to the mounting portion 80a by a screw 81 to form an integral unit, and the worm wheel 61 of the slide base drive unit D shown in FIGS. 1 and 5 It is detachably attached to the lower end of the shaft 62 of. A recess 80b that can be engaged with an engaging part 82 attached to the shaft 62 of the worm wheel 61 is formed in the attachment part (rotation center part) 80a of the cam 80, and the protrusion of the slide base shown in FIG. Part 39
The cam switch mechanism E is attached to the chassis base 24 by fixing the printed circuit board 79 to the chassis base 24 with screws (not shown) with the roller 83 hanging down at b facing a predetermined position on the outer periphery of the cam 80. It will be done. As shown in FIGS. 9 and 10, the printed circuit board 79 has arc-shaped printed patterns 84a, 84b, and 84c formed concentrically around a boss portion 79a, with the innermost pattern (GRAND) 8
4a is ground, middle pattern (ACT1)
84b is for Play and Stop modes, and
The outermost pattern (ACT2) 84c is FF, Rew
This is a pattern for In addition, 85 is a brush attached to the lower part of the cam 80, which corresponds to each of the above-mentioned patterns on the printed circuit board 79, and has three electrodes 85a, 85 sliding thereon.
b, 85c, and as described later, the cam 8
0 rotation, the electrodes 85b and 85c detect the start and end positions of the respective patterns and control the stop position of the slide base 39. In this way, the cam switch mechanism E includes the cam 80,
Since the brush 85 and other control printed circuit boards (not shown) and the separate and independent printed circuit board 79 dedicated to the cam switch are integrated into an integrated unit, this can be easily attached to the shaft 62 of the worm wheel 61, and can be easily mounted in the assembly process. Deformation of each electrode of the brush 85 and contamination of the printed circuit board 79 can be prevented, and malfunction of the cam switch mechanism E can be prevented. () Slide base position control mechanism (see Figures 11 to 14) A block diagram of the electrical system of the slide base position control mechanism is shown in Figure 11, and is based on the operation of the operation button 4 shown in Figures 2A and B. The respective operation mode signals thus output are supplied to a central processing unit (CPU) 86, and each electrode 85 of the brush 85 is supplied to the central processing unit (CPU) 86 by the rotation of the cam 80 shown in FIG.
b to 85c are each pattern 84 of the printed circuit board 79
The start and end positions of b (ACT1) and 84c (ACT2) are detected and signals are supplied to the CPU 86. The output signal of the CPU 86 drives the motor M2 via the slide base drive circuit 87 according to each mode of the operation button 4, and also drives the motor M1 for driving another capstan via the capstan motor drive circuit 88. It is. Here, to explain the specific operation, when the power of the device is turned on, the motor M1 is driven, the cam 80 and the brush 85 are rotated, and the cam 80 is in any position as shown in FIG. like,
At a position where ACT1 and ACT2 are simultaneously at H level, that is, each electrode 85a to 85c of the brush 85 is at a stop position shown at s in FIG. 12, and the slide base 39 is at a position shown by a solid line in FIG. At this time, if the signal levels of ACT1 and ACT2 do not become H at the same time, the motor M for driving the slide base will be
2 to rotate the cam 80 counterclockwise,
When the levels of ACT1 and ACT2 reach the same H level, the system enters a stopped state. Therefore, the cam pin 8 provided on the protrusion 39b of the slide base 39 shown in FIGS. 1 and 5
3 reaches the outermost circumferential position of the cam 80 shown in FIG. 10, the slide base 39 retreats to the position shown by the solid line in FIG. 1 and becomes stationary. Further, as shown in Table 1, the signal level supplied to the capstan driving motor M1 is stopped only when the strobe input terminal ( ) is at H level, and the capstan 37 is in a stopped state. Also,
When STB is at the L level, all the capstans 37 are in the drive mode, and Play, Rew, and FF modes are selected by the H and L levels of the mode discrimination terminals, and the corresponding signals are used to drive the motor M1. and is rotated at a predetermined speed.

[Table] Next, when the Rew/Play button 6 is pressed, becomes the L level and the motor M1 enters the drive mode and starts rotating. However, when the Rewind/Play button 6 is pressed (Rew), , as shown in FIG. 14, ACT1 and ACT2 become L level at the same time, and the cam 80 (electrodes 85a to 85c) rotates counterclockwise in FIG. 12 to reach the starting position (position f) of the printed pattern 84c. Detect and stop. The rotation angle of the cam 80 and the positional relationship with the slide base 39 are as shown in FIG.
Sometimes the magnetic head moves slightly backwards from when playing.
By avoiding contact with the magnetic tape 19, load acting on the reel hub shaft 25 on the winding side is prevented. Furthermore, when the press state of the Rew/Play button 6 is released, as shown in FIG. 14, in the Play mode, ACT1 is at the L level and the electrode 85b does not detect ACT2, and the cam 80 further rotates counterclockwise. Pass through o, f and s points from point r
Stops at point p where ACT1 becomes L level again.
It becomes Play mode. At this time, slide base 3
9 is moved by the elastic return force of the coil springs 50 and 51 from the position shown by the solid line in FIG. 1 in the _X1 direction due to the relationship between the rotation angle and the position of the cam 80 shown in FIG. 40 and the magnetic tape 19, the mechanism maintains the Play state and the magnetic tape 19 runs at a constant speed in the _Q1 direction. In addition, in the FF mode, the cam 80 rotates counterclockwise as the motor M2 rotates, and the ACT
The electrode 85c detects the f point where ACT2 is at the L level and ACT2 is at the H level, and the slide base 39 moves back slightly from the position at the time of Play in the _X2 direction, and the mechanism enters the FF state, as in the case of Renew. The magnetic tape 19 rotates forward at high speed. As a means of controlling the position of the slide base 39 in this way, the cam switch mechanism E that cooperates with the slide base 39 detects the start and end positions of the print pattern, so the electrical system of the apparatus can be easily configured. In addition, the position of the slide base can be controlled reliably, the device can be downsized, and it can be constructed at low cost. Furthermore, two motors M
1, M2 can be used to realize power-saving soft logic operations. Here, the operations and operations when using the compact tape recorder having the above configuration will be summarized and specifically explained. (1) Load the small tape cassette (super micro cassette) A shown in Figure 3 from the direction shown by the arrow P with the lid 2 of the device body S open as shown in Figure 2C. to close the lid body 2. (2) When the power of the device is turned on, as shown in Figs. 10 and 12, no matter what position the cam 80 is in, the control signal activates the ACT
The cam 80 rotates to a position where ACT1 and ACT2 become H level at the same time, and comes to a halt at position s in FIG. 12. (3) Press and immediately release Rew/Play button 6,
As shown in Table 1, ^STB becomes H level, the drive mode is set, and motor M2 is driven to rotate.
The slide base drive mechanism D rotates, thereby operating the cam switch mechanism E. By this operation of the cam switch mechanism E, the brush 85 attached to the cam 80 in FIG.
becomes L level, the other electrode 85c rotates without detecting the pattern 84c, and the electrode 85b of the brush 85 detects the pattern at point p again and stops. According to the rotation angle of the cam and the positional relationship of the slide base 39 shown in FIG. 13, the slide base 39 is moved as shown by the solid line in FIG. The magnetic head 40 moves in the _X1 direction from the position and reaches the position shown by the two-dot chain line. Therefore,
As described above, the magnetic head 40 enters into the introduction parts 15 and 16 of the small tape cassette A, and the tape guide part 46 moves into the thin wall part 1 of the cassette.
5a, 15b, 16a, and 16b to allow the magnetic tape 19 to run stably. By moving this slide base 39 in the _X1 direction,
One end of this presses one end of the locking members 52 and 53, and the other end is rotated to the outside of the side walls 24b and 24c of the chassis base 24, thereby locking the lid body shown in FIG. 2C. The locking portions 9a' and 9b' of the locking member are locked into a locked state. Further, during the movement of the slide base 39, one side of the slide base 39 presses the switch portion 63 to turn on the amplifier of the device. On the other hand, as shown in FIG. 8, the cam plate 70 prevents the latch 73 of the one-way clutch CL ₁ of the reel hub shaft 25 on the supply side from engaging with the latch cam 66 due to the rotation of the capstan driving motor M1. After the clutch is forcibly removed, the clutch CL ₁ becomes inactive to prevent excess back tension from acting on the reel hub shaft 26 on the drive side, and the magnetic tape 19 runs in the Q ₁ direction. . Note that when the lid body 2 is set to Play mode with the lid open and then closed, the locking members 52, 5
3 is further rotated and removed so as to close the lid 2 by the locking members 9a, 9b, and the notches 9a',
Once at position 9b', it is possible to enter and lock it. (4) If you keep pressing the FF button and the Rew/Play button 6, the ^L / ^R terminals for mode determination will become L, L and H, L levels according to the signal from the CPU 68, and the motor M1 will rotate at the specified rotation speed. is driven by. At this time, the cam 80 rotates counterclockwise, each electrode 85c, 85c of the brush 85 detects the start and end position of each pattern on the printed circuit board 79, and the cam 80 and the electrodes 85a to 85c
5c stops at mode positions f and r in FIG. As shown in FIG. 13, due to the rotation of the cam 80, during FF and Rew, the magnetic head 40 separates from the magnetic tape 19 and comes to rest at a position slightly retreated in the _X2 direction from the position during Play. This ensures stable running. (5) In the stop mode, as mentioned above, ^STB goes to H level to stop the motor M1, and the cam 80 is rotated counterclockwise again by the drive of the slide base drive mechanism D, and the slide base 39 to the position shown by the solid line in Figure 1, and as shown in Figure 14, ACT1 and
Both ACT2 becomes H level and each electrode becomes the first
It reaches position s in Figure 2 and stops. (Effects of the invention) As described above, in the compact tape recorder of the invention, the locking member that locks the lid that closes the tape cassette mounting section is capable of locking the lid when the lid is opened.
When in the Play state, the lid is moved to a position where it can be locked, and when the lid is closed in the Play state, the lid can be finally locked, so for example, a device with a lid without a window Now, after opening the lid and checking the drive operation of the tape cassette,
It has features such as the ability to close the lid and ensure reliable operation of the device.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the structure of the mechanism of a small tape recorder according to the present invention, Figures 2A and B are a front view and a partial side view of the small tape recorder, and Figure C
3 shows a small tape cassette that can be applied to the small tape recorder of the present invention, and FIG. 3A shows a perspective view of the external appearance, FIG. 4 is a plan view showing the drive system of the cassette reel drive unit, FIG. 5 is a plan view showing the slide base drive mechanism, and FIG. 6 is a plan view showing the drive system of the cassette reel drive unit. An enlarged sectional view showing the drive part of the side reel hub shaft,
FIG. 7 is an enlarged sectional view showing the drive section of the reel hub shaft on the take-up side, FIG. 8 is an explanatory view showing the operating state of the one-way clutch, FIG. 9 is a pattern diagram showing the printed pattern of the cam switch mechanism, and FIG. The figure is an exploded perspective view showing the relationship between the cam switch mechanism and the mounting shaft, Figure 11 is a block diagram showing the electrical system of the slide base position control mechanism, and Figure 12 is a diagram showing the printed circuit board pattern and each mode position of the slide base. An explanatory diagram showing the relationship, FIG. 13 is a diagram showing the relationship between the rotation angle of the cam and the slide base position,
Fig. 14 is a time chart indicating each operation mode, Fig. 15 is an external view showing the relationship between the lid body and the slide base, and Figs. 16 A to C are operation explanatory diagrams showing the operating state of the lock member. . 1... Body part, 2... Lid body, 3... Display part, 4
...Operation button, 7...Cassette pressing member, 10
... upper half body, 11 ... lower half body, 12 ... opening,
13, 14... Tape reel, 15, 16... Introducing part, 15a, 15b, 16a, 16b... Thin wall part, 19... Magnetic tape, 20... Housing body, 2
4... Chassis base, 25, 26... Reel hub shaft, 28, 29, 30, 32, 33, 35, 3
6...Pulley, 37...Capstan, 39...
Slide base, 40... Magnetic head, 41...
Pinch roller, 46... Tape guide section, 47...
... Arm part, 49 ... Coil spring, 52, 53 ... Lock member, 56 to 60 ... Gear, 61 ... Worm wheel, 62 ... Shaft, 64 ... Sleeve, 6
6... Ratchet cam, 70... Cam plate, 70a
...Groove, 73...Ratchet, 74...Cam pin, 79...Printed circuit board, 80...Cam, 84
a~84c...Pattern, 85...Brush, 86...
...Central processing unit, 87...Slide base drive circuit, 88...Capstan motor drive circuit,
A...Small tape cassette, B...Cassette reel drive unit, C...Slide base unit, D...Slide base drive mechanism, E...Cam switch mechanism,
K: Mechanism of small tape recorder, S: Main body of small tape recorder.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotatable lid body 2 that opens and closes a tape cassette loading portion 24a on which a tape cassette is placed and has locking portions 9a' and 9b' on one side, and a magnetic head. 40 and a pinch roller 41, the slide base 39 is slidable and moves forward and backward by a drive mechanism, and the rotational force is applied by an elastic means, but the rotational position is regulated, and one end is attached to the Locking part 9
It consists of rotatable lock members 52, 53 having the other ends facing one end of the slide base 39 so as to be able to engage with the lock members a' and 9b, and the lock members 52, 53 is such that when the lid body is in the closed state and the slide base 39 moves forward, the other end rotates against the elastic means when it comes into contact with the slide base; One end engages with the locking parts 9a' and 9b' of the lid 2 to lock the lid, and when the slide base is operated in the open state of the lid, it is rotated to the locked position. The locking portion 9 is closed by the closing operation of the lid.
The end portions of a' and 9b' are forcibly rotated against the elastic means and temporarily retracted from the lock position to allow the lid to close. A small tape recorder.