JPS6344352A - Holder shifting device in recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify a work process by freely connecting and separating the gear of a gear shaft to and from the rack tooth of a slider, shifting the slider in a state of the gear is separated from the rack tooth, engaging the gear at the rack tooth and pivoting the gear shaft. CONSTITUTION:A gear shaft 4, in which both edges are inserted into long holes 2a and 2a of right left side plates 2 and 2, is fixed to a large gear 4b engaged to the pinion of a motor and a small gear 4a engaged to a tooth part 3a formed at the lower surface of a slider 3 is also fixed. Consequently, when a motor is rotated, the small gear 4a is rotated through a pinion and the large gear 4b, and therefore, the slider 3 engaged to the small gear 4a is shifted. Here, the hole, into which the gear shaft 4 is inserted, is made into a long hole 2a, the gear shaft 4 is shifted, while the small gear 4a and a tooth part 3b are not engaged and the slider 3 is most protruded or most accommodated, the gear shaft 4 is returned to the original condition so that the small gear 4a and the tooth part 3b can be engaged, later on, pivoted with a bearing 6a formed at a fitting plate 6 and the difference in the protruded quantity of a right left slider 3 is eliminated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a holder in which a cassette holder is formed for introducing a compact cassette, digital audio cassette, etc. into a tape recorder when the cassette is loaded into the tape recorder. The present invention relates to a holder moving device in a recording and reproducing device in which a driving mechanism for a moving member is improved.

[Conventional technology]

Conventionally, one method for loading a cassette into a tape recorder is to protrude a holder moving member on which a cassette holder is formed from the front side of the tape recorder main body, and after setting the cassette in this protruding cassette holder, the holder moving member The cassette is loaded into the tape recorder body by retracting the cassette.

By the way, as a mechanism for moving the above-mentioned holder moving member back and forth, a pair of sliders on which rack teeth are formed are attached to the holder moving member, and the rack teeth of the sliders are meshed with a pair of gears fixed to a gear shaft. There was one in which the slider was moved by rotating the gear shaft, and the holder moving member was moved back and forth.

[Problem that the invention seeks to solve]

By the way, in the drive mechanism for the holder moving member described above, the sliders are moved synchronously, so if there is a misalignment in the meshing position between the gears on the pair of gear shafts and the rack teeth on the pair of sliders, the holder will not move. There was a problem in that the range of longitudinal movement of the member was not constant. Therefore, the meshing position between the gear and the rack teeth must always be maintained at a constant position, and conventionally, this meshing position was determined by aligning the marks formed on the gear with the marks formed on the rack teeth.

For this purpose, it is necessary to match the marks on the pair of gears, and also to form marks on the rack teeth.Therefore, a pre-process is required, leading to increased costs, and
There were also problems in the assembly process, such as poor workability.

[Purpose of the invention]

The present invention aims to solve the above-mentioned problems, and the gear of the gear shaft is made to be able to freely approach and separate from the rack teeth of the slider, and with the gear separated from the rack teeth, the slider can be moved in either the forward or backward direction. Since the gear is moved to the position of the rack, the gear is engaged with the rack teeth, and the gear shaft is pivotally supported, it is very easy to align the rack teeth and the gear, and the work efficiency can be improved. , an object of the present invention is to provide a holder moving device in a playback device.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention makes the gear of the gear shaft movable toward and away from the rack teeth of the slider, and moves the slider in either direction forward or backward with the gear separated from the rack teeth. The gist of the present invention is that the gear is meshed with the rack teeth and the gear shaft is pivotally supported.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
4, 1 is a chassis to which a cassette holder (described later) is attached, 2, 2 are left and right side plates placed on the left and right sides of the chassis 1 (only one is shown in FIG. 1), 3 .3 is a slider placed in the gap between the left and right side plates 2, 2 and the chassis 1 (also only one is shown in Fig. 1) to connect the left and right side plates 2, 2 and the chassis 1. Since the pins la and la pass through guide holes 3a and 3a formed in the slider 3°3, the sliders 3 and 3 are formed to be slidable relative to the chassis 1 and the left and right side plates 2 and 2. has been done.

Reference numeral 4 denotes a gear shaft whose both ends are inserted into the elongated holes 2a, 2a of the left and right side plates 2, 2, and a small gear 4at4a that meshes with teeth 3b, 3b formed on the lower surface of the slider 3°3.
s and a large gear 4b that meshes with a pinion 5a of a motor 5 fixed to a mounting plate (not shown) attached to either the left or right side plates 2, 2. As a result, when the motor 5 is rotated, the small gear 4a is rotated via the pinion 5a and the large gear 4b, so that the sliders 3, which are meshed with the small gear 4a, slide. Here, if the meshing positions of the tooth portions 3b, 3b of the pair of sliders 3, 3 and the small gears 4a, 4a of the gear shaft 4 are shifted, the sliders 3, 3
A problem arises in that the amount of protrusion is different. Therefore, in the present invention, the hole into which the gear shaft 4 is inserted is replaced with the elongated hole 2a, 2
a, by moving the gear shaft 4 so that the pinions 4a, 4a do not mesh with the teeth 3b, 3b, and with the slider 3.3 in the most protruding state or in the retracted state, The gear shaft 4 is returned to its original position so that the gear shaft 4a meshes with the teeth 3b, 3b, and is then supported by a bearing 6a formed on a mounting plate 6, which will be described later (see FIGS. 5 and 6).

Reference numeral 6.6 denotes a mounting plate (only one is shown in FIG. 1) screwed to the outside of the left and right side plates 2, 2, and guide holes 6b, 6b formed on the front surface are connected to the board 7. It is guided by fixed guide bars 8, 8 and is attached so as to be movable relative to the substrate 7. Also, this mounting plate 6, 6
One mounting plate (the right mounting plate in Figure 1)
A semi-cylindrical guide tube 6C with one end closed is formed in the guide tube 6C, and a guide groove 6d is formed in the guide tube 6C.

Reference numeral 9 denotes a small number of internal threads 9C inside which the guide rod 9a inserted into the guide tube 6C is attached via the connecting piece 9b.
(FIG. 7), a protruding piece 9d is formed on the opposite side corresponding to the guide rod 6b. and,
The guide rod 9a of the nut member 9 is inserted into the guide tube 6C while the connecting piece 9b is guided into the guide groove 6d. Next, when the mounting plate 6 is attached to the side plate 2 with the spring 10 inserted, the bent piece 2 formed on the end surface of the side plate 6
b closes the opening of the guide tube 6C, so the spring 10 and the nut member 9 are housed in the guide tube 6C.

Reference numeral 11 designates a screw rod that is rotatably supported on the base plate 7, the middle part of which is screwed into the female thread 9C of the nut member 9, and the tip end of the rod screwed into the female thread 9C of the nut member 9. Jlla is installed. This Boo+J 11a is the motor 12 fixed to the board 7.
A belt 13 is wound between the boot IJ 12a and the boot IJ 12a. Therefore, since the mounting plates 6, 6 are guided by the guide bars 8, 8, when the motor 12 is rotated, the threaded rod 11 is rotated via the belt 13, and the nut member 9 meshed therewith is moved. As a result, the mounting plate 6°6 moves. As a result, the left and right side plates 2, 2 to which the mounting plates 6, 6 are attached move, so the chassis 1
moves via pin 1a.

14.15 is a switch attached to the board 7, which is turned on and off by the protruding piece 9d of the nut member 9, and the motor 12 is turned on and off.
control.

Reference numeral 16 denotes a power switch fixed to the substrate 7, which is pressed once and turned on when the pressing force is released, and turned off when pressed again and the pressing force is released. 1
Reference numeral 7 designates a switch operating rod slidably attached to the board 7, one end protruding from the front surface of the panel 18, and the rear end corresponding to the power switch 16. Reference numeral 19 denotes a lock plate rotatably supported by the base plate 7, and the claw portion 1
9a is adapted to engage with a claw portion 17a formed on the switch operating rod 17. The lock plate 19 also includes a protrusion 6e formed on the mounting plate 6 described above, and the mounting plate 6,
An engaging piece 19b is formed that engages when the holder 6 is housed at the left end in the figure.

2.0 is a spring that biases the lock plate 19 in the direction in which the claw portion 19a is engaged with the claw portion 17a. Therefore, the mounting plates 6, 6 are retracted, i.e., the chassis 1
When the lock plate 19 is retracted, the engagement piece 19b of the lock plate 19 is rotated by the projection 6e of the mounting plate 6 against the spring force of the spring 20, and the claw part 19a moves the claw part 17a of the switch operating rod 17. Since it is outside the range, when the switch operating rod 17 is operated from the front of the panel 18, the switch operating rod 17 freely moves back and forth to operate the power switch 16. That is, the power is turned on and off, and all operations are started or stopped. In addition, when the chassis 1 is moving forward, the protrusion 6e of the mounting plate 6 moves away from the position of the lock plate 19, so the lock plate 19 is rotated by the spring 20, and the claw part 19a is rotated by the switch operation lever. It is located within the movement range of the claw portion ITa of No. 17. Therefore, when the switch operating rod 17 is pressed, the claw portion 17a of the switch operating rod 17 comes into contact with the claw portion 19a of the lock plate 19. Here, the lock plate 19 has a shape with the claws 19a, 17a and a protruding position of the claws 19a.
, 17a come into contact with each other, they are rotated against the spring force of the spring 20, and the claw portion 17a passes through the claw portion 19a. Then, when the pressing force on the switch operating rod 17 is released, the switch operating rod 17 is moved back by the restoring force of the power switch 16, but this time the claws 19a and 17a are engaged, so that the switch operating rod 17 is It stops midway (see Figure 8). As a result, the power switch 16 remains in its previous on state without being switched. In this state,
The mounting plate 6 moves back and the engagement part 1 between the protrusion 6e and the lock plate 19
9b is engaged and rotated against the spring force of the spring 20, the claw portion 19a of the lock plate 19 and the claw 11 of the switch operating rod 17. The engagement with a is released. Therefore, the switch operating rod 17 is moved back by the restoring force of the power switch 16, so that the power switch 16 is turned off (see FIG. 9).

Reference numeral 21 denotes an arm whose one end is rotatably supported on the inner surface at the front of the chassis 1, and a protrusion 21a is formed at the other end, and this protrusion 21a forms a curved hole 1b formed in the chassis 1. The left and right side plates 3 are protruded through the
, 3 are inserted into the 7-shaped guide grooves 3c, 3c. 22 is a first cassette holder for holding a cassette such as a digital audio tape, and a second cassette holder.
By screwing it to the cassette holder 23, a rectangular space is formed in the front view into which the cassette is inserted. Further, the second cassette holder 23 is pivotally supported by the other end of the arm 21 at a protruding portion 23a, and a spring force is applied by a spring 24 in the opening direction (upward in the figure). Reference numeral 25 denotes a rotating arm formed in a U-shape in plan view, and an arm portion 25a.
The base side of each cassette holder is pivotally supported by the chassis 1, and the distal end side of each is pivotally supported by a protruding portion 23a of the second cassette holder 23. Further, a protruding piece 25b formed at the intermediate portion of the arm portion 25a is inserted into a long hole 21b formed in the arm 21.

The first cassette holder 22 has a hole 22a for a reel shaft inserted into the reel of a loaded digital audio tape cassette, and a stopper 22b for positioning the cassette and a hole 22b for opening the cassette lid. In order to do this, a protrusion 22C is formed for shifting a part of the cassette.

Reference numeral 26 is a dog-shaped ratchet arm that is pivotally supported on the outer surface of one of the right side plates 3, and is biased counterclockwise by a spring 27 so that the engaging piece 26a is stopped in a substantially horizontal state. The other end is in contact with a protrusion 3d formed on the right side plate 3. Reference numeral 28 denotes a substantially fan-shaped slider drive arm pivotally supported on the inner surface of the chassis 1, and a triangular protrusion 28a formed on the outer surface of the chassis 1
It protrudes from the curved hole IC formed in the hole IC, and faces the engagement piece 26a of the ratchet arm 26. Also,
On the upper surface of the slider drive arm 28, an engaging protrusion 2 that protrudes upward from a long hole 1d formed at a corner of the chassis 1 is provided.
8b is formed.

Reference numeral 29 designates a slider arm that is pivotally supported on the upper surface of the chassis 1, and has a notch 29a formed at one end to be engaged with the engaging protrusion 28b of the slider drive arm 28, and a protrusion 29b formed at the other end. has been done. Reference numeral 30 denotes a cassette ejecting plate slidably attached to the upper surface of the chassis 1, and is always biased in the backward direction by a spring 31. Further, the notch 30a formed in the cassette ejection plate 30 has a protrusion 2 of the slider arm 29.
9b is engaged.

Next, to explain the operation based on the above configuration, now,
When the switch operating rod 17 is pressed in a state where the chassis 1 shown in FIGS. is rotated counterclockwise against the spring force of the spring 20, so that the claw 17 of the switch operating rod 17
a moves without being engaged with the claw 19a of the lock plate 19. Therefore, the power switch 16 is turned on and the motor 12 starts rotating. When the motor 12 rotates, the belt 1
3, the screw rod 11 is rotated, so that the screw rod 11
The nut member 9 screwed together moves forward. As a result, one of the mounting plates 6 (on the right side in FIG. 1) to which the nut member 9 is attached moves while being guided by the guide bar 8, so the right side plate 2 to which this mounting plate 6 is fixed moves. . Therefore, right side plate 2 and chassis 1
The right side plate 2 connected via the guide bar 8 also moves while being guided by the guide bar 8. That is, the entire chassis including the chassis 1 moves forward while being guided by the guide bars 8, 8.

Then, as described above, the mounting plate 6 moves forward, and the protrusion 9d
When the operator operates the switch 15, the power to the motor 12 is cut off, and the entire movement stops regardless of whether the power switch 16 is in the on state (FIG. 10,
(See Figure 1).

However, in this state, since the first and second cassette holders 22 and 23 do not protrude from the chassis 1, a cassette cannot be loaded. Therefore, when an eject switch (not shown) is operated, the motor 5 is energized, and the gear shaft 4 is rotated via the pinion 5ap and the large gear 4b. When the gear shaft 4 is rotated, the pinion 4a+4a is rotated, so that the left and right side plates 2, 2
The sliders 3, 3 supported by the bins 1a, 1a move back. Here, when the sliders 3, 3 retreat, the protrusions 21a, 21a guided by the guide grooves 3c, 3c of the sliders 3, 3 move along the shape of the guide groove 3C23C, so that the guide groove 3C+3C When located on the slope, the protrusions 21a, 21a rise. Therefore, the arm 21 on which the protrusions 21aj 218 are formed is rotated clockwise in the figure since one end is pivotally supported by the chassis 1. When the arm 21 is rotated, the arm 21, the second cassette holder 23, and the rotating arm 25
Since the shaft support portion with respect to the chassis 1 forms a substantially parallelogram, the second cassette holder 23 moves with the protrusion 21a in response to the retreat of the sliders 3, 3.

While the guide grooves 3c and 3c are moving through the inclined portions of the guide grooves 3c and 3c, the guide grooves 21a rise in a parallel state, and when they reach the horizontal portion of the guide grooves 3C+3C, the rise stops and the second cassette holder 2
3 maintains a state protruding from the chassis 1. Therefore,
Place the tape cassette in the 1st and 2nd cassette holders 22.2
It can be inserted into the space of No. 3 (see Fig. 12).

Note that when the first and second cassette holders 22 and 23 are open, the protrusion 21a of the arm 21 is in the guide groove 3c of the slider 3, 3.

3C, the first and second cassette holders 22 and 23 will not fall down even if unreasonable force is applied and pressed from above.

On the other hand, when the sliders 3 and 3 move backward, the slider 3
, 3 moves backward, and the protrusion 28a of the slider drive 28 located on the movement locus of the ratchet arm 26 comes into contact with the engagement piece 26a, causing the slider drive arm 28 to move as shown in the figure. Rotate counterclockwise. Here, slider drive arm 28
When the slider arm 29 is rotated, the slider arm 29 that is engaged with the engagement protrusion 28b is rotated by the engagement protrusion 28b formed on the slider drive arm 28, so that the slider arm 29 can freely slide relative to the chassis 1. Attached cassette ejection plate 30
is moved forward against the spring force of the spring 31. This cassette ejection plate 30 is connected to the first and second cassette holders 22.
Since the cassette discharge plate 3 is located at the opening of the cassette discharge plate 3,
0 moves forward, its tips are inserted into the first and second cassette holders 22.23, and if a cassette is loaded in the gap, they come into contact with the front surface of the cassette and push it out (the first (See Figure 13). Then, when the slider 3 moves further forward, the engagement piece 26 of the ratchet arm 26
a is disengaged from the protrusion 28a, and the engagement piece 26a moves rearward from the protrusion 28a. As a result, the slider drive arm 28 returns to its original position via the cassette discharge plate 30 and the slider arm 29 due to the spring force of the spring 31. Therefore, the cassette ejection plate 30
It retreats from the gap in the cassette holder 22, 23.

Next, when a cassette (for digital audio) is loaded with the first and second cassette holders 22 and 23 pushed up, the lock piece formed on the cassette is held by the protrusion 22c of the first cassette holder 22. When the cassette is released, a portion of the cassette is engaged by the stopper 22b, so that when the cassette is pushed in, a portion of the cassette is displaced and the lid can be opened.

In this state, when a play switch (not shown) is operated, the motor 5 starts rotating in the opposite direction to the above and moves the sliders 3, 3 forward. When the sliders 3, 3 move forward, the protrusion e21a of the arm 21 guided by the guide grooves 3c, 3c descends, so that the second cassette holder 23, which is pivotally supported by the arm 21, and the rotating arm 25 are in a horizontal state. to descend. When this descent is completed, the cassette lid comes into contact with a protrusion (not shown) formed on the chassis 1 and is opened, and a tape pull-out claw (not shown) operates to pull out the tape and hang it on the rotating head. Turn.

On the other hand, when the sliders 3, 3 move forward, the ratchet arm 26 comes into contact with the protrusion 28a of the slider drive arm 28;
Since the surface that contacts the protrusion 28a is tapered, the engagement piece 26a is rotated against the spring force of the spring 27 and passes without being engaged with the protrusion 28a.

Therefore, since the cassette ejecting plate 30 remains in the retracted position without moving, the cassettes loaded in the gaps between the first and second cassette holders 22, 23 will not be ejected.

In this state, the cassette tape can be played back or recorded by rotating the reel stand (not shown) and rotating the rotary head.

In the above state, the chassis 1 protrudes from the panel 18, so in order to store the chassis 1 within the panel 18, a storage switch (not shown) is operated. As a result, the motor 12 rotates in the opposite direction to that described above, so the threaded rod 11 rotates in the opposite direction via the belt 13, and the nut member 9
This starts retracting from engagement with the female screw 9C.

In addition, in the engagement between the threaded rod 11 and the female thread 9C of the nut member 9, the female thread 9C has one or two threads.
Even if the parallelism between the guide bar 8 and threaded rod 11 is lost due to a dimensional error of the parts, the movement of the nut member 9 will not be hindered because there are only a few threaded parts.

As described above, when the nut member 9 retreats, the mounting plate 6 on which the nut member 9 is supported retreats, so that the left and right side plates 2
, 2, the chassis 1 is also moved backward. When the left and right side plates 2, 2 move backward, the rear ends of the left and right side plates 2°2 first come into contact with the stopper 7a formed on the base plate 7, and the left and right side plates 2.
, 2 stops.

Therefore, the chassis 1 and the mounting plates 6, 6 also stop, and the front surface of the chassis 1 reaches a predetermined position. That is, it does not protrude from the front surface of the panel 18 and always stops at a fixed position. However, in this state, the motor 12 is still rotating, so the nut member 9 is held in place by the spring 10.
It continues to move backwards against the spring force. Then, when the protruding piece 9d of the nut member 9 comes into contact with the switch 14, the switch 14 is turned off, so that the power to the motor 12 is cut off and the rotation of the motor 12 is stopped. Therefore,
Each member including the chassis 1 is housed inside the panel 18, and reproduction, recording, etc. are performed in this state (see FIG. 14).

〔Effect of the invention〕

As described above, the present invention provides a holder moving device that moves a holder moving member by rotating a gear meshed with rack teeth of a slider that moves the holder moving member, in which the gear of the gear shaft is connected to the rack teeth. After the slider is moved forward or backward, the gear is engaged with the rack teeth and is pivoted, so that the engagement position between the gear and the rack teeth is always maintained at a predetermined position. In addition to being able to engage in position, the engagement is very simple, which has the effect of simplifying the work process.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a plan view of the assembled state, Fig. 3 is a side view, Fig. 4 is a front view, and Fig. 5 is a gear shaft. 6 is a front view of the same as above; FIG. 7 is an enlarged sectional view showing the engagement state of the screw rod and the nut member; FIG. 8 is a plan view showing the power switch in the locked state; Fig. 9 is a front view showing the same as above in the released state, Fig. 10 is a plan view showing the state in which the holder protrudes forward, Fig. 11 is a side view of the same as above, and Fig. 12 shows the state in which the holder is raised in the same as above. Fig. 13 is a plan view showing a state in which the cassette is ejected from the holder;
FIG. 14 is a plan view showing the entire storage state. DESCRIPTION OF SYMBOLS 1... Chassis, 2... Left and right side plates, 3... Slider, 4... Gear shaft, 6... Mounting plate, butt... Guide bar, 9... Nut member, 14.15. ...Switch, 16...Power switch, 17...Switch operating rod, 19...Lock plate, 21...Arm, 22...
First cassette holder, 22... Second cassette holder, 25... Rotating arm, 26... Ratchet arm, 28... Slider drive arm, 29... Slider arm, 30... Cassette ejection Board. Patent Applicant Pioneer Corporation Figures 5 and 6 10 9q

Claims (1)

[Claims] In a recording/playback device having a holder moving member for exchanging and loading the recording medium by protruding a holder portion for storing a recording medium from the front surface of the panel, the holder portion is disposed on the left and right sides of the holder moving member and is synchronously moved in a straight line. a pair of sliders having rack teeth that operate the holder moving member by movement; a rotationally driven gear shaft having a gear that meshes with the rack teeth of the sliders; A pair of side plates in which at least one of the elongated holes for presetting the gear shaft is formed, and by being fixed to the side plates, the end of the gear shaft is pivotally supported, and the gear of the gear shaft and the rack teeth of the slider are fixed to the side plates. A holder moving device for a recording and reproducing device, comprising a mounting plate that completely engages the holder.