JPH0770118B2 - Cassette mounting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front loading cassette loading device that can be used in a magnetic recording / reproducing device such as a cassette video tape recorder.

2. Description of the Related Art Recently, in a cassette loading device of a front loading type video tape recorder, a device has been devised which moves a cassette holder to a predetermined position by using a slide member which linearly reciprocates by a motor.
Hereinafter, a conventional example which is not known and which is considered before embodying the present invention will be described with reference to FIG.

FIG. 7 shows an outline of the configuration of a conventional cassette mounting device which is not known.

In FIG. 7, 1 is a cassette holder for accommodating a cassette, 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 on both sides of the cassette holder 1, 8,
Reference numeral 9 is an L-shaped guide groove provided on the side plates 6 and 7, each of which is composed of two or three guide grooves.
5 are engaged. The guide pins 4 and 5 are guide grooves.
Of course, it is provided corresponding to the number of 8, 9. 1
Drive arms 0 and 11 are connected by a shaft 12 and are rotatably supported on the side plates 6 and 7. The drive arms are rotatably supported by the side plates 6 and 7 on the side wall members 2 and 3 of the cassette holder 1 described above. The main guide pins 4, 5 are respectively engaged. On one side 11 of the drive arm, a gear 15 is integrally formed concentrically with the shaft 12. Reference numeral 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. Reference numerals 19 and 20 are first and second elongated guide holes provided in the second slide member, and 21 and 22 are third and fourth elongated guide holes provided in the first slide member. And 23 and 24 are provided in the side plate 7, and the first and third elongated guide holes 19, 21 and the second and third elongated guide holes 20,
First slide member 1 inserted into each of the first and second slide members 1
A guide member for guiding the linear reciprocating movement of 7,16. Reference numeral 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. Reference numeral 27 is a first gear portion provided on the second slide member 16 and is driven by being connected to a drive gear 28 which is a drive source of the cassette mounting apparatus. Reference numeral 29 denotes a second gear portion provided on the first slide member, which is connected to the gear 15 integrally provided on the drive arm 11. Reference numeral 30 is a protrusion provided on the first slide member 17, and is engaged with an actuator 32 of a slide switch 31 fixed to the side plate 7.
The structure in which the first and second slide members connected by the elastic member as shown in FIG. 7 are used as a power transmission device improves the operability of the user and locks the motor. It functions as a clutch mechanism that prevents

With respect to a conventional cassette mounting device which is not publicly known and is configured as described above, the operation of the power transmission device portion will be described below with reference to FIGS. 7 to 11.

8 to 11 show details of the operation of the first and second slide members. FIG. 8 is a view when the cassette holder 1 is at the cassette take-out and insertion position. At this time, in FIG. 7, the side walls 2, 3 of the cassette holder 1 are shown.
The guide pins 5 and 6 provided at the position are in contact with the end faces 33 and 34 of the L-shaped guide grooves 8 and 9 provided at the side plates 6 and 7. When the guide pins 5 and 6 are in contact with the other end surfaces 35 and 36 of the L-shaped guide grooves 8 and 9, it is a cassette reproducing and recording position. When the cassette is inserted into the cassette holder 1 at the cassette take-out and insertion position shown in FIG. 7 and the cassette is further pushed in, the cassette holder 1 has L-shaped guide grooves 8 and 9 provided in the side plates 6 and 7. Move along. At this time, the movement is performed by the guide pins 5 and 6 provided on the side walls 2 and 3 of the cassette holder 1 and the drive arm.
Guide grooves 13 and 14 provided in 10 and 11 and drive arms 10 and 11
A first slide member via a gear 15 integrally formed with
Passed to 17. At this time, the second slide member 16 is locked by the drive gear 28. When the power is turned on, when the first slide member 17 moves in the A direction to the position shown in FIG. 9, the slide switch 31 operates and the drive gear 28 starts to rotate, and the second slide member 16 is driven in the A direction. It

The second slide member 16 moves to the position shown in FIG. 10 in which the locking projection 26 provided on the first slide member 17 contacts the left end of the locking hole 25 provided on the second slide member 16. After that, the first slide member 17 is driven in the A direction by the engagement of the locking hole 25 and the locking projection 26, and the driving force is transmitted to the cassette holder 1 via the driving arms 10 and 11. Then, the cassette holder 1 is driven from the cassette take-out and insertion position to the cassette reproduction and recording position. If the user does not insert the cassette to the position shown in FIG. 9, the elastic member 18 causes the first slide member 17 to move.
Is returned to the position shown in FIG. 8, and the cassette holder 1 is returned to the cassette taking-out and inserting position. When the power is turned off, when the first slide member 17 is inserted into the cassette holder 1 and pushed further, the first slide member 17 passes through the position shown in FIG. 9 and then the position shown in FIG. 11, that is, the locking hole 25 of the second slide member 16. The first slide member 17 moves further to the position where the locking projection 26 of the first slide member 17 contacts the right end, but the second slide member 16 is locked by the drive gear 28, so the first slide member 17 moves further. However, the user receives resistance as a reaction force. Of course, when the hand is released, the force of the elastic member 18 causes the cassette holder 1 to return to the cassette taking-out and inserting position shown in FIG.

As described above, most of the conventionally used cassette mounting apparatuses usually use one elastic member, and as a result, as the user inserts the cassette, the elastic member is resistant to the elastic member. Then, the insertion force of pushing in increases linearly, and the user may insert it until the stroke in which the locking projection comes into contact with the right end of the locking hole 25.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described clutch mechanism of the cassette loading device, since the pushing stroke of the cassette tape is not limited, the slide switch for detecting the insertion of the cassette operates and the motor drive If the cassette tape is pushed in more than necessary or shocked after the automatic pull-in operation is started, the clutch mechanism and the slide connected to it will be overloaded and a part of the drive system will be damaged. Had the problem.

In view of the above-mentioned problems, the present invention provides a click feeling when inserting a cassette by instantaneously increasing the insertion force required when the cassette tape is pushed in at any stroke after actuation of the cassette insertion start detection switch. ,
To provide a cassette mounting device equipped with a clutch mechanism that includes a load means that does not impose a pseudo limit on the stroke for pushing the cassette tape by hand and does not push it by an excessive load. is there.

Means for Solving the Problems In order to solve the above problems, a cassette mounting apparatus according to the present invention includes a cassette holder that detachably holds a cassette, a first position at which the cassette holder is detachable, and a cassette. Side plates for guiding reciprocating movement to and from a second position where recording or reproduction can be performed, and to bring the cassette holder from the first position to the second position and in the opposite direction. And a cassette holder driving means for driving the slide member, and the cassette holder driving means converts the linear movement of the sliding member into a rotary movement by linearly reciprocating movement by receiving power of a motor when required. And a power transmission mechanism that transmits the movement force to the cassette holder as a moving force, and the slide member is a guide provided on one of the side plates. A first slide member that can move horizontally along the member, an elongated hole with which a protrusion provided on the first slide member engages, and a first slide member, a first elastic member, and a load means. The second parts, which are connected to each other by the
A clutch mechanism having a slide member is provided, and a load force of the load means of the clutch mechanism acts on the second slide member at least when the cassette holder is at the first position where the cassette holder is detachable from the cassette. It is a structure that does not allow it.

Effect The present invention can give a click feeling to the insertion operation against insertion of the cassette tape by the above-mentioned configuration, and can reduce damage to the drive system due to overload at the insertion of the cassette. .

Examples Hereinafter, examples of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a cassette mounting device according to an embodiment of the present invention. In the figure, the same numbers are assigned to the same names as the above-mentioned conventional example, and the description thereof is omitted here. Also, its operation is omitted.

37 has a first elongated hole 40 and a second elongated hole 41 whose horizontal movement is restricted by guide pins 38 and 39 fitted in the first slide member 47 and the second slide member 48, respectively,
Further, it is an auxiliary slide member including the first slide member 47 and the second elastic member 42 fixedly acting on one end thereof. The first elastic member 18 is the same as that used in the conventional example, and is mounted between the first slide member 47 and the second slide member 48.

As described above, the load means is constituted by 37 auxiliary slide members or 42 second elastic members.

FIG. 1 is a schematic side view showing a cassette taking-out position and an inserting position. Other constitutions and constituent members of the present embodiment are the same as those of the conventional unillustrated cassette mounting device described in FIGS. 7 to 11 above. Since it is exactly the same, the description is omitted here.

In FIG. 2, when the cassette is pushed in, the cassette holder 1 for holding the cassette moves and the cassette holder 1
When the drive arm 11 rotates in the clockwise direction via the pin 5 on the side wall, the first slide member 47 engaged with the drive arm 11 by 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 48 connected to this drive gear 28 is not operating. Therefore, at this time, the first elastic member is 18 extends between the first slide member 47 which is moving with respect to the fixed second slide member 48 as shown in the figure. Furthermore,
The second elastic member 42 engaged between the first slide member 47 and the auxiliary slide member 37 gives a larger tension than the first elastic member 18 and engages, so that the first slide member 47 is engaged.
, The second elastic member 42 does not expand and moves by the same stroke amount as the first slide member 47. As shown in FIG.
The long hole 40 moves to a position where it contacts the guide pin and stops.

Therefore, in the state of FIG. 3, the first slide member 47 and the second slide member 47
Only the elastic tension of the first elastic member 18 acts on the clutch mechanism including the slide member 48, the auxiliary slide member 37, and the elastic members 18 and 42.

That is, the load force of the load means does not act on the second slide member.

Up to this time, the operation is similar to that of a conventional mechanism which is not publicly known, but when the cassette is further pushed in as shown in FIG. 4, basically, the first slide member 47 further moves, and The slide switch 31 engaged with is turned ON, the drive gear 28 rotates clockwise, and the second slide member 48 moves in the same direction as the moving direction of the first slide member 17.

However, if the pushing operation of the cassette is fast and the pushing force is large with respect to the time actually operated by the motor drive, the first slide member
Due to drive loss, etc., during the time required for 47 to reach the stroke of moving from the position shown in FIG. 3 to the position shown in FIG.
It is considered that the second slide member 48 is actually in the same state as when it is stopped. Therefore, at this time, as shown in FIG. 4, the first slide member 47 extends further than that shown in FIG. 3, and the auxiliary slide member 37 has the first slide member 37 as shown in FIG. Since the left end of the long hole 40 is fixed by contacting with the guide pin 38 attached to the stopped second slide member, the guide pin 39 attached to the first slide member 47 slides in the second long hole 41. The second elastic member 42 that moves and has one end fixed to the first slide member 47 extends for the first time here. That is, the load force acts on the second slide member by the load means. Therefore, in the state of FIG. 4, the first slide member 47
The elastic members 18 and 42 engaged with the second
Since it acts against the slide member 48, a tension load much larger than the elastic member tension of FIG. 3 is applied to the first slide member.
47, and is added momentarily at the position of arbitrary slide stroke, so that when the user pushes the cassette by the reaction force, the insertion force is increased via the drive arm 11 and the cassette holder 1. Will be felt immediately. This is the first slide member 47 and the second slide member.
Protrusion 26 that limits the sliding stroke to and from 48
It is considered that the right wall 43 of the long hole actually exists in the long hole 25 and acts as if the slide stroke amount is limited.

If the right wall 43 is present at the position shown in FIG. 3, if the user continues to push in the cassette, the slide limiting amount is mechanically reduced by the slide members 47 and 48 in the strokes subsequent to FIG. Move with each other, so that the drive gear 28 receives an overloaded tangential force against an abnormal insertion force, becomes unable to follow when a certain load is exceeded, and is damaged. Therefore, it is ideal that the right wall is in a position where the long hole is made as long as possible, and it is considered desirable from the viewpoint of fulfilling the original function of the clutch.

As described above, the elastic load increases during the slide, which gives the user a clicking sensation and makes it possible to make the user feel that there is no need to insert it further.
As a result, it is considered that the unnecessary insertion stroke is reduced, and the drive unit which is relatively weak in strength can be protected. The elastic tension of the second elastic member 42 can be freely determined in accordance with the degree of the click feeling, and the gap 44 of the first elongated hole 40 of the auxiliary slide member 37 can be arbitrarily determined to provide the click feeling. There is an advantage that the insertion stroke amount and the insertion load can be obtained arbitrarily.

Further, as shown in FIG. 5, when assembling the auxiliary slide member 37, the insertion guide shapes 45 and 46 formed at the right ends of the elongated guide holes 40 and 41 provided in the auxiliary slide member 37 are inserted into the guide pins 38 and 39. There is a notch that is larger than the diameter, and when inserting, insert this part at the same time,
By sliding to the right as shown in Fig. 6,
As this notch is not used in the normal guide range, assembly is greatly simplified,
It becomes possible to assemble at low cost.

EFFECTS OF THE INVENTION As described above, according to the present invention, the load force generated by a part of the load means constituting the clutch mechanism is not applied to the second slide member when the cassette tape is inserted, with an extremely simple structure, The cassette tape can be given a click feeling when it is inserted over a certain stroke, and the excellent effect of preventing damage to the drive unit due to overload due to abnormal operation during insertion can be obtained. You can

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette mounting apparatus according to an embodiment of the present invention, FIGS. 2 to 4 are side views of a clutch mechanism portion for explaining the operation of the embodiment of the present invention, FIGS. FIG. 6 is a perspective view of an essential part of another embodiment of the present invention, FIG. 7 is a perspective view of a conventional cassette mounting device, and FIGS. 8 to 11 are side views showing the operation of a conventional clutch mechanism portion. . 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 …… Insert guide.

Claims (1)

[Claims] 1. A cassette holder for removably holding a cassette, and a reciprocating movement of the cassette holder between a first position where the cassette can be attached and detached and a second position where the cassette can be recorded or reproduced. And a cassette holder driving means for driving the cassette holder so as to bring the cassette holder from the first position to the second position and in the opposite direction, and the cassette holder driving means. Includes a slide member that linearly reciprocates by receiving the power of a motor when required, and a power transmission mechanism that converts the linear motion of the slide member into a rotational motion and transmits the rotational motion to the cassette holder as a moving force,
The slide member has a first slide member that can move horizontally along a guide member provided on one of the side plates, and an elongated hole with which a protrusion provided on the first slide member engages, and 1st elastic member locked to one slide member,
The clutch mechanism comprises a second slide member that is connected to the load means and is mounted so as to slide on each other, and the load means of the clutch mechanism includes the first slide member and the first slide member. A second slide member having a first elongated hole and a second elongated hole for being guided and moved by guide portions respectively provided on the two slide members, and having a tension larger than the tension of the first elastic member. One end of the elastic member is composed of an auxiliary slide member engaged with the first slide member, and at least the cassette holder applies a load force of the load means of the clutch mechanism to a first position at which the cassette is detachable. At this time, the cassette mounting device is characterized in that it does not act on the second slide member.