JPH0778391A - Tape deck - Google Patents

Abstract

PURPOSE:To eliminate a special mechanism for preventing misinsertion of a cassette by adding a function for preventing a slider from moving upon misinsertion of the cassette to an operating member for releasing a front lid of the cassette from its locking. CONSTITUTION:The slider 33 holding the cassette 3 is moved along a guide groove provided on a holder 31 from a standby position to a loading position. A lock releasing arm 41 is provided on one side plate of the slider 33 in a position corresponding to a front lid lock releasing button 5 of the cassette 3. When the slider 33 is started to move from the standby position to the loading position, a base part 41b of the lock releasing arm 41 is shifted from a protrusion 31a. The lock releasing button 5 is pressed by elasticity of a spring with a hook 41c to release the front lid from its locking. When the cassette 3 is not correctly inserted into the slider 33, since the hook 41c cannot be displaced in the direction of the cassette 3, an angular part 43 is restrained by a protrusion 45, and hence the slider 33 is prevented from further moving.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape deck, for example, a tape deck incorporated in a magnetic recording or reproducing device for recording or reproducing by mounting a cassette tape such as a video cassette, an audio cassette or a digital recording cassette. It is about.

[0002]

2. Description of the Related Art Conventional tape decks include those shown in FIGS. The tape deck 1 shown in the figure has a cassette holder 2 vertically provided on both sides, and a cassette tape 3 placed on the tape deck 1, which is guided by the cassette holder 2 and slides from a standby position to a predetermined recording / reproducing position. It has a pair of cassette sliders 4.

The cassette tape 3 is provided with a front lid 3A for protecting all the tapes. When the cassette tape 3 is inserted into the tape deck 1 and cassette loading is started, the front lid lock release mechanism in the tape deck is used to move the tape to the front. The lid is unlocked, the front lid 3A is opened upward, and the tape is pulled out. That is, the lock release arm 7 provided on the side portion of the cassette slider 4 is connected to the front lid lock release button 5 provided on the front side portion of the cassette tape 3.
The front lid 3A is unlocked by pressing.

The cassette tape 3 is attached to the cassette slider 4.
7 is provided at a position corresponding to the front lid lock release button 5 of FIG. 7, and when the cassette tape 3 is inserted and the cassette slider 4 starts to move, the hook at the tip of the lock release arm 7 7a is urged by a spring (not shown) so as to rotate inwardly around the shaft portion 7b so as to push the end surface of the front lid lock release button 5 inward. As shown in FIG. 8, until the cassette tape 3 is correctly inserted into the cassette slider 4, the unlocking arm 7 has a base portion 7c which engages with a convex portion 2a provided at a corresponding position on the inner surface of the cassette holder 2 to hook 7.
The a is rotated outward against the biasing force of the spring so that the front lid lock release button 5 is not pushed.

On the other hand, when the cassette tape 3 is correctly inserted and the cassette slider 4 holds the cassette tape 3 on it,
When moved slightly backward, the base portion 7c of the unlocking arm 7 moves rearward from the convex portion 2a by this movement, and the hook 7a pivots inward by the biasing force of the spring to lock the front lid as shown in FIG. Press the end surface of the release button 5 and
The lock of A is released and the front lid 3A can be opened, then the switch for loading is turned on, and the cassette slider 4 moves backward with the cassette tape 3 still mounted, and is mounted at a predetermined position. To be done.

[0006]

However, in such a conventional tape deck, this is the case where the user inserts the cassette tape 3 correctly, and the cassette tape is inserted at an angle with an error. In this case, the unlocking arm 7 does not rotate, and the cassette tape is moved backward together with the cassette slider 4 without the front lid 3A being unlocked, and the cassette tape is loaded at a predetermined position.
I can't pull out the tape. Further, in the worst case, there is a problem that the shaft portion 7b of the lock release arm may be broken or the deck itself may be damaged due to excessive insertion.

Therefore, in order to prevent these accidents, an erroneous insertion preventing mechanism is additionally provided to prevent erroneous insertion, and if the cassette tape 3 is not inserted correctly, the erroneous insertion preventing mechanism works to insert a certain amount of cassette tape or more. I can't do it. There are various types of erroneous insertion prevention mechanisms, and since this erroneous insertion prevention mechanism is provided separately from the front lid lock release mechanism described above, the number of parts increases and the number of man-hours for installing the erroneous insertion prevention mechanism increases. However, there is a problem in that the work cost also increases.

The present invention has been made in view of the above conventional problems, and does not use any separate component as a cassette tape erroneous insertion prevention mechanism, but utilizes a front lid lock release mechanism, which is extremely simple. It is an object of the present invention to provide a tape deck having a front lid lock release mechanism that also functions as an erroneous insertion prevention mechanism without being broken or damaged by such a structure.

[0009]

SUMMARY OF THE INVENTION The present invention is a tape having a front lid lock releasing mechanism having a lock releasing arm which is attached to a cassette slider which is guided by a cassette holder and which releases a lock of a front lid of a cassette tape. The deck is provided with a corner formed on the tip end side of the unlocking arm and a projection provided on the cassette holder corresponding to the corner and capable of contacting the corner, and the cassette tape is erroneously inserted. Then, the corners come into contact with the protrusions to prevent movement of the cassette slider to prevent erroneous insertion of the cassette tape.

According to the present invention, in addition to the structure of claim 1, when the cassette tape is erroneously inserted and the corner portion of the lock releasing arm comes into contact with the protrusion, the base end of the lock releasing arm and the cassette slider are moved. The feature is that the distance to the side wall is set to be equal to or less than the elastic deformation amount of the shaft portion of the unlocking arm.

[0011]

According to the present invention, since the front end of the lock releasing arm of the front lid lock releasing mechanism has the corner portion which comes into contact with the protrusion provided on the cassette holder, the cassette tape is erroneously inclined to the cassette holder. When inserted, the tip of the lock release arm unlocks the front lid of the cassette tape from the front lid lock release button position to the front side or the rear side (Fig. 3).
(The position shown in FIG. 3), it moves rearward together with the cassette slider, and the corner of the unlocking arm abuts against the projection of the cassette holder to be locked and the movement of the cassette slider is prevented.

Further, according to the present invention, when the cassette tape is erroneously inserted, the corner portion of the lock releasing arm abuts the protrusion of the cassette slider, and the shaft portion of the lock releasing arm is elastically deformed to cause the base end of the lock releasing arm. Hit the side wall of the cassette slider and are locked.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are views showing an embodiment of the tape deck according to the present invention, and the same components as those shown in FIGS. 6 and 8 to 9 are designated by the same reference numerals. First, the configuration will be described.
In FIG. 1, 11 is a deck chassis in which the tape deck according to the present invention is applied to a video tape deck 10.
A head cylinder 12 incorporating a recording / reproducing head (not shown) for image information in the deck chassis 11, a supply reel shaft 15 engaging with a supply reel 14 of the cassette tape 3 at a recording / reproducing position, and a take-up reel 16. The take-up reel shaft 17 to be matched, the capstan roller 19 for driving the video tape 18 housed in the cassette tape 3, and the video tape 1 facing the capstan roller 19
A pinch roller 20 that presses 8 against the capstan roller 19 side is rotatably mounted. Two
Reference numeral 1 is a recording / reproducing head for voice information and the like.

Reference numeral 22 denotes a loading motor. The loading motor 22 is attached to the deck chassis 11 via a bracket and is not shown in the drawings such as a cassette loading / unloading mode, a fast forward mode, a recording / reproducing mode and a rewinding mode which are selected by an operator's operation. Forward / reverse rotation is interlocked with the operation of the mode selection switch. Loading motor 2
A worm 24 rotatably attached to the deck chassis 11 is connected to the worm 2, and the worm 24 is coaxial with the disk cam 25 in which a cassette attachment / detachment cam groove and a mode switching cam groove are engraved. The wheels 26 are in mesh.

Reference numeral 27 denotes a cassette carrying lever, which engages with a cassette attaching / detaching cam groove of the disc cam 25 via a pin 27A, and the outer end portion 27a is moved as the disc cam 25 rotates. The cassette tape 3 is attached to and detached from the deck chassis 11 via the rack 28, the pinion 29, and the arm 30 fixed to the pinion 29 which are reciprocally moved and connected to the outer end portion 27a. .

A pair of rectangular plate-shaped cassette holders 31, 32 are fixed to both ends of the deck chassis 11. 33 is a cassette slider, and the cassette slider 33 is a side plate portion 33 parallel to the cassette holders 31 and 32.
A and 33B, and a plate-shaped holding portion that connects the lower ends of the side plate portions and mounts and holds the cassette tape 3, and is guided by L-shaped guide grooves provided in the cassette holders 31 and 32. It is slidably mounted in the front-rear direction and the vertical direction from the standby position A to the mounting position where the cassette tape 3 is mounted. The cassette slider 33 is configured such that a shaft 35 protruding through the guide groove to the outside engages with a tip end portion of an arm 30 fixed to the pinion 29, and is movable with rotation of the pinion 29. There is.

One side plate portion 33 of the cassette slider 33
A bent unlocking arm 41 as shown in FIGS. 2 and 4 is formed in the center of a through window portion 33a formed at a position corresponding to the front lid unlocking button 5 of the cassette tape 3 inserted in A. It is rotatably attached with the columnar shaft portion 41a of FIG. In addition, the lock release arm 4
1 is biased in the counterclockwise direction C in FIG. 2 by a coil spring (not shown) attached to the lower portion of the shaft portion 41a.

As shown in FIG. 4, the unlocking arm 41 has a bent base portion 41b in front of the shaft portion 41a, a hook 41c formed at the rear end of the shaft portion 41a, and the shaft portion 4.
1a and a corner portion 43 which is formed on the outer side of the bending portion on the tip side and has a vertical contact surface 42 on the rear side.
2 is a protrusion 45 formed inside the cassette holder 31.
Can be abutted against.

On the inner surface of the cassette holder 31, a protrusion 31a similar to the protrusion 2a shown in FIG. 8 is provided at a corresponding position of the base portion 41b of the unlocking arm 41 of the cassette sludge 33 at the standby position. Also, this protrusion 31a
A protrusion 45 is provided at a position corresponding to the corner portion 43 of the unlocking arm 41 described above, which is further away from the predetermined distance. The protrusion 45 has a vertical engaging surface 46 on the front side, and can engage with the abutting surface 42 of the corner portion 43 of the unlocking arm 41.

Next, the operation will be described. In the present invention, since the projection 45 is provided on the cassette holder 31 and the corner portion 43 is provided on the lock release arm 41, when the cassette tape 3 is inserted into the cassette slider 33 in an inclined manner by mistake, Front lid lock release button 5
Is moved to the rear side together with the cassette slider 33 while the position of is on the front side (the position shown in FIG. 3) from the position of the hook 41c of the lock releasing arm 41, the base 41b of the lock releasing arm 41 is displaced from the protrusion 31a, and the lock is released. The release arm 41 tries to rotate around the shaft portion 41a by the urging force of the spring, but the hook 41c is located behind the front lid lock release button 5 on the side wall of the cassette tape 3 or the front lid 3.
Contact the side wall of A.

Therefore, the lock release arm 41 does not rotate sufficiently, and the hook 41c does not press the front lid lock release button 5, and the corner portion 43 moves rearward while being positioned outside, The vertical abutment surface 42 of the portion 43 is a protrusion 45.
Of the cassette slider 33 is abutted and locked by the vertical engaging surface 46, and the cassette slider 33 to which the unlocking arm 41 is attached is prevented from moving erroneously and erroneous insertion is prevented.

FIG. 5 is a diagram showing an essential part of an embodiment of the present invention according to claim 2, and the same components as those shown in FIGS. 1 to 4 are designated by the same reference numerals. In FIG. 5, the unlocking arm 41 unlocks the distance D between the base end 41d of the unlocking arm 41 and the front side wall 53b of the through window 53a of the cassette slider 53 in the through window 53a of the cassette slider 53. It is attached to the cassette slider 53 so as to reinforce the shaft portion 41a of the unlocking arm 41 such that the elastic deformation amount of the shaft portion 41a of the arm 41 is less than or equal to the elastic deformation amount.

Therefore, when the cassette tape 3 is erroneously inserted and is pushed in by a stronger insertion force, the corner portion 43 of the unlocking arm 41 is pressed by the projection 45, and the shaft portion 41a is likely to be deformed or broken. However, the base end 41
Since the distance D between the d and the front side wall 53b of the through window portion 53a is small, the shaft portion 41a is elastically deformed and the base end 41d is immediately brought into contact with the front side wall 53b and held, and the insertion force is the shaft portion 41a.
Instead of receiving it, the front side wall 53b of the cassette slider 53 receives it. Therefore, the shaft portion 41a is only slightly elastically deformed, and when the insertion force disappears, the deformation of the shaft portion 41a is restored and it is possible to prevent the shaft portion 41a from being broken.

As described above, when the cassette tape 3 is mistakenly inserted obliquely, the cassette tape 3 is prevented from being inserted through the lock release arm 41. That is, the protrusions 45,
This can be achieved only by providing extremely simple projections and corners called the corners 43, and the erroneous insertion prevention mechanism can be implemented with a structure that doubles as a lock release arm.

[0025]

As described above, according to the present invention,
The front lid lock release mechanism is used without using any separate parts as a cassette tape misinsertion prevention mechanism.Because of the extremely simple structure, there is no increase in cost, breakage or breakage It can be a lid lock release mechanism.

[Brief description of drawings]

FIG. 1 is an overall plan view of a video tape deck to which a tape deck according to the present invention is applied.

FIG. 2 is a cross-sectional view of a main part of the embodiment shown in FIG.

FIG. 3 is a cross-sectional view of an essential part showing the operation of the embodiment shown in FIG.

4A and 4B are views showing an unlocking arm of the embodiment shown in FIG. 1, in which FIG. 4A is a plan view thereof and FIG. 4B is a side view thereof.

FIG. 5 is a sectional view showing a main part of an embodiment according to claim 2 of the present invention.

FIG. 6 is an overall schematic plan view of a conventional tape deck.

FIG. 7 is a plan view showing a conventional lock release arm.

FIG. 8 is a sectional view of a main part of a conventional tape deck.

FIG. 9 is a sectional view showing an unlocked state of a front lid of a conventional tape deck.

[Explanation of symbols]

 3 Cassette tape 3A Front lid 10 Video tape deck (tape deck) 31, 32 Cassette holder 33, 53 Cassette slider 41 Lock release arm 43 Corner 45 Protrusion 53b Front side wall (side wall) D Distance

Claims (2)

[Claims] 1. A tape deck provided with a front lid lock release mechanism having a lock release arm which is attached to a cassette slider which is guided and moved by a cassette holder and which releases a lock of a front lid of a cassette tape. When the cassette tape is erroneously inserted, the corner portion is provided with a corner portion formed on the tip end side and a projection provided on the cassette holder corresponding to the corner portion and capable of contacting the corner portion. A tape deck, which abuts against the protrusion to prevent the cassette slider from moving erroneously to prevent erroneous insertion of a cassette tape. 2. The distance between the base end of the lock releasing arm and the side wall of the cassette slider when the cassette tape is erroneously inserted and the corner portion of the lock releasing arm comes into contact with the protrusion, The tape deck according to claim 1, wherein the amount of elastic deformation of the portion is set to be equal to or less than the elastic deformation amount.