JPS63102060A - Cassette loading device - Google Patents

Abstract

PURPOSE:To sense a click when a cassette is inserted and to insure and excessive load against being given by instantaneously increasing the force of inserting a cassette tape at any stroke after a cassette insertion start detection switch acts. CONSTITUTION:When the cassette tape is pushed, a 1st slide member 17 moves further, and a slide switch engaged with the member 17 is turned ON to turn a drive gear 28 clockwise. A 2nd slide member 16 moves in the same moving direction as the 1st slide member 17. If the cassette tape is pushed quickly with a great force, elastic members 18 and 42 engaged with the 1st slide member 17 act against the 2nd slide member 16 in recess. Hence an extremely large tensile load is given to the 1st slide member 17, whereby a user instantaneously feels an increase in insertion force. Thus that increase is sensed as a click to reduce unnecessary insertion strokes.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a front-loading cassette loading device that can be used in magnetic recording and reproducing devices such as cassette video tape recorders.

2. Description of the Related Art Recently, in a cassette loading device for a front-loading video tape recorder, a device has been devised in which a cassette holder is moved to a predetermined position using a sliding member that is linearly reciprocated by a motor.

Hereinafter, referring to FIG. 7, an explanation will be given of an unknown conventional example that was conceived before implementing the present invention.

FIG. 7 shows an outline of the configuration of a conventional cassette loading device that is not publicly known.

In FIG. 7, 1 is a cassette holder for storing cassettes, 2 and 3 are side walls integrally formed on both sides of the cassette holder 1, 4 and 5 are guide pins provided on the side walls 2 and 3, and 6 and 7 are Side plates arranged on both sides of the cassette holder 1, and 8 and 9 are L-shaped guide grooves provided in the side plate 6.7, each consisting of two or three guide grooves.
The guide pins 4 and 5 are engaged with each other. In addition,
Of course, the guide pins 4 and 5 are provided in correspondence with the number of guide grooves 8 and 9. Reference numeral 10.11 denotes a drive arm connected by a shaft 12 and rotatably supported by a side plate 6.7. Main guide pin 4,
5 are combined with 5 pages each. One side 11 of the drive arm has the shaft 1
A gear 15 is integrally formed coaxially with the gear 2.

16 is a second slide member, and 17 is a first slide member integrally connected to the second slide member by an elastic member 18. 19 and 2° are the first and second long guide holes provided in the second slide member, and 21 and 22 are the third and fourth guide holes provided in the first slide member, respectively. Holes 23 and 24 are provided in the side plate 7, and the first and third
A guide member that is inserted into the guide elongated hole 19.21 and the second and third guide elongated holes 20.22 to guide the linear reciprocating movement of the first and second slide members 17.16. be. 25 is a locking hole provided in the second slide member 16, and 26 is a locking hole provided in the first slide member 17, which is inserted so as to be able to lock with a part of the locking hole 25. It is a protrusion. 27 is the second slide member 1
A first gear section provided at 6 is connected to and driven by a drive gear 28 which is a drive source of the present cassette mounting device. 296
Bay i is a second gear portion provided on the first slide member, and is connected to the gear 15 provided integrally with the drive arm 11. A projection 30 is provided on the first slide member 17 and engages with an actuator 32 of a slide switch 31 fixed to the side plate 7. A configuration in which the first and second slide members connected by an elastic member as shown in FIG. 7 are used as a power transmission device improves operability for the user and prevents the motor from locking. It functions as a clutch mechanism to prevent

The conventional, unknown cassette mounting device constructed as described above will be described below with particular reference to the operation of its power transmission unit with reference to FIGS. 7 to 11.

FIGS. 8 to 11 show details of the operation of the first and second slide members. FIG. 6 is a diagram when the cassette holder 1 is in the cassette ejecting and inserting position.
At this time, in FIG. 7, the side wall 2 of the cassette holder 1
, 3, the guides 7L, -7 inner pins 5, 6 are located in contact with the end faces 33, 34 of the L-shaped guide grooves 8, 9 provided in the side plate 6, 7. When the guide bins 5, 6 are in contact with the other end faces 35, 36 of the cursor-shaped guide grooves 8, 9, the cassette is at the playback and recording position. When the cassette is inserted into the cassette holder 1 at the cassette removal and insertion position shown in FIG. and move. At this time, the movement is controlled by guide bins 5 provided on the side walls 2 and 3 of the cassette holder 1.
, 6 and the guide groove 1 provided in the drive arm 10.11.
3.14 and a gear wheel 15 formed integrally with the drive arm 10.11 to the first sliding member 17. At this time, the second slide member 16 is locked by the drive gear 28. When the power is ON, when the first slide member 17 moves in the inward direction at position 1 shown in FIG. 9, the slide switch 31 is activated and the drive gear 28 starts rotating, and the second slide member 16 is driven in the inward direction. be done.

A locking protrusion 2 provided on the first slide member 17 at the left end of a locking hole 25 provided on the second slide member 16
After the second slide member 16 moves to the position shown in FIG. 1Q where the locking hole 25 and the locking projection 26 touch
The first sliding member 1 is driven in the input direction by engagement with the cassette holder 1, and its driving force is transmitted to the cassette holder 1 through the drive arm 10.11'i, so that the cassette holder 1 The cassette is driven to the playback and recording position. If the user does not insert the cassette to the position shown in FIG.
As a result, the first slide member 17 is returned to the position shown in FIG. 8, and the cassette holder 1 is returned to the cassette removal and insertion position. When the power is OFF, insert the cassette into the cassette holder 1 and press it further to release the first slide member 1.
7 is 9 bases from the position shown in FIG. 9 to the position shown in FIG.

However, since the second slide member 16 is locked by the drive gear 28, the first slide member 1
If it is 7, -1 = it cannot be moved anymore, and the user will receive resistance as a reaction force. Of course, when the user releases his/her hand, the cassette holder 1 returns to the cassette ejecting and inserting position shown in FIG. 7 due to the force of the elastic member 18.

As described above, most conventional cassette loading devices usually use one elastic member, and as a result, as the user inserts the cassette into the cassette, the elastic member The insertion force of pushing in against the locking hole 25 increases linearly, and the user may insert the locking protrusion until it reaches a stroke where it touches the right end of the locking hole 25.

Problems to be Solved by the Invention However, since the clutch mechanism of the cassette loading device as described above has no limit to the pushing stroke of the cassette tape, the slide switch for detecting the start of cassette insertion is activated and the motor is driven. 10 pages after the retraction operation starts automatically.

If the cassette tape is continuously pushed in more than necessary or with an impact, an overload will be applied to the clutch mechanism section and the slide section connected to it, resulting in damage to a part of the drive system. .

In view of the above-mentioned problems, the present invention instantly increases the insertion force required to push in the cassette tape at any stroke after the cassette insertion start detection switch is activated, thereby creating a cliquey feeling when inserting the cassette. ,
There is no artificial limit to the stroke of pushing the cassette tape by hand to prevent pushing in with an unnecessary overload, and a plurality of auxiliary slide members are provided in the clutch mechanism. The object of the present invention is to provide a cassette mounting device equipped with a clutch mechanism including a novel auxiliary slide mechanism that facilitates assembly work by providing a horn-shaped insertion guide section at one end of a long hole section.

Means for Solving the Problems In order to solve the above problems, the cassette mounting device of the present invention includes a cassette holder for removably holding a cassette, and a cassette holder for removably holding a cassette. side plates for guiding the force nand holder so as to be able to reciprocate between a first position and a second position where recording or reproduction of the cassette is possible; cassette holder driving means for driving the cassette holder in the direction of
The cassette holder driving means includes a slide member that linearly reciprocates in response to power from a motor when necessary, and a power transmission mechanism that converts the linear motion of the slide member into rotational motion and transmits it to the cassette holder as a moving force. The slide member includes a first rack that is movable horizontally by being stored in a guide member provided on one of the side plates, and a long hole that is engaged with a protrusion provided on the first rack. and a second rack connected to the first rack by a first elastic member and mounted so as to slide relative to each other; It has a first elongated hole and a second elongated hole for horizontal movement guided by guide parts provided in the rack and the second rack, respectively, and one end thereof is connected to the first rack and the first elongated hole. an auxiliary slide member elastically engaged with a second elastic member having a tension greater than the tension of the elastic member; the auxiliary slide member is initially activated only by the first elastic member as the first rack moves horizontally; However, when the first elongated hole stroke part fully slides and then stops, and the first rack further moves horizontally, the second elastic member fixed to one end of the auxiliary slide member expands, and the first Since both the elastic member and the second elastic member act simultaneously, it is possible to momentarily apply a doubled tension between the first rack and the second rack, and the first rack and the auxiliary slide member mechanism is configured to provide a click feeling when inserting a cassette tape in any area where the second rack acts as a clutch via a plurality of elastic members. It is something.

Effect of the Invention The present invention has the above-described structure, so that a cassette tape can be inserted into a cassette tape with a click feeling in the resisting insertion operation.

This makes it possible to reduce damage to the drive system due to overload when inserting a cassette.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of a cassette loading device according to an embodiment of the present invention. In the figure, the same numbers as those in the conventional example described above are given the same numbers, and the explanations here will be omitted. -1, and its operation will also be omitted.

Reference numeral 37 indicates guide pins 38 and 3 set by 1% 39 in the first slide member 1 and the second slide member 1e, respectively.
The first elongated hole 40 and the second elongated hole whose horizontal movement is regulated by the
This is an auxiliary slide member that has a long hole 41 and includes a first slide member 17 and a second elastic member 42 that is fixed to one end of the first slide member 17 and acts. Further, the tenth bullet member 18 is similar to that used in the conventional example, and the first slide member 17 and the second slide member 16
mounted between.

1 41, -) FIG. 1 is a schematic side view showing the cassette ejection and insertion positions, but the other configurations and constituent members of this embodiment are similar to those of the previously unknown conventional art explained in FIGS. 7 to 11 above. Since this is exactly the same as the cassette loading device, the explanation will be omitted here.

In Figure 2, when the cassette is pushed in, the cassette holder 1 that holds the cassette moves, and the cassette holder 1
When the drive arm 11 is rotated clockwise via the pin 5 on the side wall of the drive arm 11, the first slide member 17, which is engaged with the drive arm 11 through the connecting gear 29, moves. At this time, since the drive gear 28 is stopped until the slide switch is turned on, the second slide member 16 connected to the drive gear 28 is not in operation. The member 18 extends between the first slide member 17 which is moving relative to the fixed second slide member 16 as shown. Furthermore, the second elastic member 4 engaged between the first slide member 17 and the auxiliary slide member 37
2 is engaged with the first elastic member 42 with a tension greater than that of the first elastic member 18, so even if the first slide member 17 moves, the second elastic member 42 does not stretch and is connected to the first slide member 17. They will move by the same stroke amount, and as shown in FIG. 3, they will move and stop at a point 1 where the first elongated hole 4o of the auxiliary slide member 37 touches the guide pin.

Therefore, in the state shown in FIG.
This means that only the elastic tension of the first elastic member 18 is acting.

Up to this point, the operation is similar to that of a conventional mechanism that is not publicly known. Next, as shown in FIG. 4, when the case is pushed further, the first slide member 17 basically moves further, The engaged slide switch 31 is turned ON, the drive gear 28 rotates clockwise, and the second slide member 16 is moved to the first position.
The slide member moves in the same direction as the stroke.

However, if the cassette is pushed in quickly and with a large knife, the first slide member 1
7 moves from the position shown in FIG. 3 to the position shown in FIG. 4.Due to drive loss etc. during the time it takes for the second slide member 16 to reach the rotor, the second slide member 16 is actually in the same state as if it were stopped. It is thought that there is. Therefore, at this time, as shown in FIG. 4, the first slide member 17 extends further than shown in FIG. Since the left end of the elongated hole 4o is in contact with and fixed to the guide pin 38 inserted into the stopped second slide member, the guide pin inserted into the second elongated hole 41 into the first slide member 17 is fixed. 39 slides, and the second elastic member 42, whose one end is fixed to the first slide member 17, expands for the first time. Therefore, in the state shown in FIG. 4, the elastic members 18 and 42 engaged with the first slide member 17 act against the stopped second slide member 16, so that the tension of the elastic members in FIG. Also, an extremely large tension load is applied to the first slide member 17, and moreover, an arbitrary slide stroke of 17 hours is applied.

Since the insertion force is applied instantaneously at the position, when the user pushes the cassette due to the reaction force, the user immediately feels an increase in the insertion force via the drive arm 11 and the cassette holder 1. This is because the right wall 43 of the long hole actually exists in the protrusion 26 and the long hole 25 that limit the sliding stroke between the first slide member 17 and the second slide member 16, and the slide It is thought that it acts as if it were limiting the stroke amount.

This sliding limit amount is determined by the following: If the right wall 43 exists in the position shown in FIG. 3, if the user continues to push the cassette, the sliding members 17 and 16 will mechanically move after the stroke from FIG. Because they move together, the drive gear 28 receives an overload tangential force in response to an abnormal insertion force, and if the load exceeds a certain level, it will be unable to follow the load and will be damaged. Therefore, it is ideal for the right wall to be located in a position where the elongated hole is as long as possible, and it is considered desirable from the standpoint of fulfilling the original clutch function.

1 8,, -S As mentioned above, the increase in elastic load during the slide gives the user a clicking sensation, making it possible to make the user think that there is no need to insert it any further.
As a result, it is thought that the unnecessary insertion stroke is reduced, and the driving part, which is relatively weak in strength, can be protected. Note that the elastic tension of the second elastic member 42 is
The click feeling can be freely determined according to the degree of the click feeling, and the gap 4 between the first elongated hole 4o of the auxiliary slide member 37
By arbitrarily determining 4, there is an advantage that the insertion stroke amount and insertion load that provide a click feeling can be arbitrarily determined.

In addition, as shown in FIG.
Insertion guide shapes 45 and 46 formed at the right ends of 0 and 41 have notches larger than the diameters of guide bottles 38 and 39, and when inserting, after fitting these parts at the same time, as shown in FIG. By sliding it to the right as shown, this notch is used in the normal guide range.

This structure greatly simplifies assembly and allows assembly at low cost.

Effects of the Invention As described above, according to the present invention, with an extremely simple configuration, it is possible to provide a click feeling when inserting a cassette tape, and to prevent damage to the drive unit due to overload caused by abnormal operation during insertion. Excellent effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a cassette loading device according to an embodiment of the present invention, FIGS. 2 to 4 are side views of a clutch mechanism section for explaining the operation of the embodiment of the present invention, and FIGS. FIG. 6 is a perspective view of a main part of another embodiment of the present invention, FIG. 7 is a perspective view of a conventional cassette loading device, and FIGS. 8 to 11 are side views showing the operation of a conventional clutch mechanism. . 37...Auxiliary slide member, 38.39...
...Guide pin, 40...First elongated hole, 41.
...Second elongated hole, 42...Second elastic member,
43...Right wall, 44...Gap, 45
, 46... Insertion guide section. Name of agent: Patent attorney Toshio Nakao and 1 other person 45
．． 46-J Biiricha interior Figure 5

Claims (2)

[Claims] (1) A cassette holder that removably holds a cassette, and a guide that allows the cassette holder to be moved back and forth between a first position where the cassette can be installed and removed and a second position where the cassette can be recorded or played back. and cassette holder driving means for driving the cassette holder to bring it from the first position to the second position and in the opposite direction, and the cassette holder driving means is configured to move as required. The slide member includes a slide member that linearly reciprocates when receiving power from a motor, and a power transmission mechanism that converts the linear motion of the slide member into rotational motion and transmits it to the cassette holder as a moving force. , a first rack that is horizontally movable along a guide member provided on one of the side plates, and a long hole that engages with a protrusion provided on the first rack; a clutch mechanism including a second rack connected by a first elastic member and mounted so as to slide relative to each other; It has a first elongated hole and a second elongated hole for horizontal movement guided by a provided guide part, and one end thereof is connected to a first rack and a tension force greater than the tension of the first elastic member is applied. an auxiliary slide member elastically engaged with a second elastic member having a auxiliary slide member, the auxiliary slide member first moves the first elongated hole while acting only on the first elastic member as the first rack moves horizontally. The stroke part slides and then stops, and the first rack further moves horizontally, so that the second elastic member fixed to one end of the auxiliary slide member expands, and the first elastic member and the second In order for both the elastic members to act simultaneously, the first rack and the second
It is possible to instantaneously apply added tension between the racks of the cassette tape in any area where the first rack and the second rack act as a clutch via a plurality of elastic members. A cassette loading device characterized in that the auxiliary slide member mechanism is configured to provide a click feeling during insertion. (2) The first elongated hole and the second elongated hole of the auxiliary slide member have a width larger than the guide member provided in the first rack and the second rack, respectively, and a guide forming portion of the elongated hole. 2. The cassette mounting device according to claim 1, further comprising an insertion guide portion continuous with the cassette mounting device.