JPH01317262A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent the deformation or the breakage of a device due to the contact between the cassette cover and the device by securing such a constitution where a contact member of a lock release member touches a preventing member of a side face plate to stop the horizontal movement of a cassette holder in case a position error is caused between the cassette and the cassette holder. CONSTITUTION:In the case a cassette 14 is not completely set into a cassette holder 1 and a position error is caused between the cassette 14 and the holder 1, i.e., the contact has an error between a lock contact part 20b and a lock release part 19a of the cassette 14, a contact member 21 of the member 20 touches a preventing member 22 of a side face plate 2 to stop the horizontal movement of the holder 1. Thus it is possible to prevent the deformation or the breakage of a device caused by the contact between a cover 18 of the cassette 14 and a device and also to avoid the damage of a magnetic tape.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette mounting device used in a cassette front-loading video tape recorder or the like.

BACKGROUND OF THE INVENTION In recent years, cassette loading devices for cassette tape recording and reproducing apparatuses such as video tape recorders (VTRs) have mainly been of the front loading type, in which the cassette is loaded from the front.

An example of a conventional cassette mounting device will be described below with reference to FIG.

FIG. 5 shows the configuration of a conventional cassette loading device. In Fig. 5, 1 is a cassette holder that stores a cassette, 2 and 21 are side plates arranged on both sides of the cassette holder 1, and 3.31 is an L-shaped guide groove provided on the side plate (2.2'). Usually, each consists of two or three pieces. 4, 41 is cassette holder 1
A side wall member integrally formed on both sides of the side wall member, each of which is provided with guide pins 5, 51 corresponding to the number of guide grooves that engage with the guide grooves 3.31 provided in the side plate 2.2'. ing. 6.61 is attached to both ends of the shaft 7 whose both ends pass through the side plates 2゜21 on both sides, and the side plate F
Transmission gear rotatably supported on 2 + 2', 8°8
1 is a rotatable drive arm that is shaft-supported by 2 and 2', respectively, meshing with the transmission gears 6 and 6', and is rotatable, and the above-mentioned cassette holder 1 The main guide pins 5.51 on the side wall members 4.41 of are respectively engaged.

A drive motor 10 drives the transmission gear 6 or 61 via a gear transmission mechanism 11. 12 is the side plate 2゜2
This is an upper surface plate that connects the upper ends of 1. 1a is a pressure spring provided on the upper surface of the cassette holder 1.

Next, Figure 6 shows the configuration of a part of the cassette holder.
A lock release lever 13 is rotatably supported by the right side wall member 4 of the cassette holder 1, and is biased to rotate inward of the cassette holder 1 by a lever spring 13a. This lock release lever 13 has a lock contact part 13b that releases the lock of the cassette lid by contacting with a part of the locking means of the cassette, which will be described later, and a lock release lever 13 that comes into contact with the side plate 2. A contact portion 13c to be rotated is integrally formed.

Next, the cassette to be inserted into the cassette holder 1 will be explained using FIGS. 7 to 9. The cassette 14 includes a cassette housing 17 formed by combining an upper half 15 and a lower half 16 and fixing them with screws, an M2S that covers the opening of the cassette and protects the magnetic tape inside, and a lid 18 in a closed state. It consists of a locking plate 19 for locking.

The lock plate 19 has a lock release part 19a and a lock part 1.
9b and a rotating shaft 19c are integrally formed, and are supported by the lower half 16 so as to be rotatable about the rotating shaft 19c in the direction of arrow A in FIG. 8 and in the direction of the mouth. Reference numeral 19d denotes a spring provided on the rotation shaft 19c of the lock plate 19, which constantly applies rotational force to the lock root ratio in the direction of arrow A in FIG.

The lid 18 is normally configured such that the lock portion 19b and the lock receptacle of the lid 18 can engage with the surface 18a, and cannot be opened in the direction of arrow A in FIG. Lid 18 7th
To open in the eight directions indicated by the arrow in the figure, press the unlocking portion 19a1 of the lock plate 19 in the direction indicated by the arrow in Figure 8, and the lock receiver of the lid 18 releases the engagement between the surface 18a and the lock center of the lock plate 19. do.

Next, the operation of the cassette mounting device of the cassette 14 will be explained.

FIG. 10 shows the state of the cassette holder 1 in the first position where the cassette 14 can be attached to and detached from the cassette holder 1, but the contact portion 1& of the lock release lever 13 is in contact with the side plate 2, and the lock release lever 13 is in the state of being rotated in the two directions of the arrows in FIG. 10, and the lock abutting portion 13b
and the unlocking part 19a of the cassette 14 are in a state where they are separated, and the cassette 14 can be easily attached to and removed from the cassette holder 1.

When the cassette holder 1 is in the first position, when the cassette 14 is inserted into the cassette holder 1 from the front in the two directions indicated by the arrows in FIG.
begins to rotate, causing the drive arm 8.degree. 81 to rotate via the gear transmission mechanism 11 and the transmission gears 6 and 6'.

Therefore, the cassette holder 1 integrated with the guide pins 5.5' engaged in the guide grooves 9, 91 provided on the drive arms 8, 81 moves along the guide grooves 3.31 on the side surface fV-) 2.2'. ,
The cassette mounting operation is completed by moving from horizontal movement to vertical movement, and the cassette holder 1 is in the second position. When the horizontal movement is started and the contact between the side plate 2 and the contact portion 13c of the lock release lever 13 is released, the lock release lever 13 is moved to the 10th position by the rotational force of the spring 13a, as shown in FIG. It rotates in two directions indicated by the arrows in the figure, and locks the lock abutting part 13b and the unlocking part 19a of the cassette 14.
The lock plate 19 rotates in the direction of the arrow (see Figures 8 and 1), and the lock part 19b of the lock plate 19 and the lock receiver of the cassette 14 are engaged with the surface 18a. The lid 18 of the cassette 14 is unlocked.

Problems to be Solved by the Invention However, with the above configuration, when the cassette 14 is inserted into the cassette holder 1, the cassette 14 is forced to a position where the side plate 2 and the contact portion 13c of the lock release lever 13 are separated. If the pressing force is suddenly released after continued insertion with force, the cassette holder 1 and cassette 14 are returned to the ejection direction as a reaction force. As a result, as shown in FIG. 12, the positional relationship between the cassette 14 and the cassette hopper 1 shifts (the lock abutting portion 13b and the unlocking portion 19a of the cassette 14 come into contact with each other), making it impossible to completely mount the cassette 14. . In this state, when the cassette loading operation is completed and the cassette holder 1 is in the second position, the lid 18 that protects the magnetic tape remains closed, so the equipment is deformed due to the lid 18 coming into contact with the equipment. Furthermore, if the device is used in a deformed state, the magnetic tape of the cassette may be damaged.

In order to solve the above problem, the spring force of the pressure spring 1a provided on the top surface of the cassette holder 1 can be increased to strengthen the cassette holding force.
If the spring force of a is strengthened, the cassette 14 will be opened.
There is a problem in that the load increases when inserting the device into the reader 1, making it extremely difficult to use.

The present invention solves this problem by continuing to insert the cassette with strong force until the contact part of the lock release lever and the side plate are separated, and then suddenly releasing the pressing force. If the positional relationship of the cassette holder shifts, that is, if the lock contact part and the lock release part of the cassette come out of contact, the movement of the cassette holder to the second position can be stopped, and the cassette can be moved to the second position. It is an object of the present invention to provide a cassette mounting device that can prevent deformation and breakage of equipment and damage to magnetic tape due to contact with a lid.

Means for Solving the Problem In order to solve this problem, the present invention provides a cassette holder T that can detachably hold a cassette and has a locking means for locking an openable lid in a closed state. A lock release member is provided on a side wall member of the cassette so as to be fully rotatable, and the lock release member includes a lock abutting portion capable of releasing the lock of the cassette by abutting a part of the locking means of the cassette, and a lock release member of the cassette. A pressurizing part having a spring property that applies a rotational force to a part of the means in a direction in which the lock abutting part can always come into contact is provided, and a part of the locking means of the cassette locks the unlocking member. The cassette holder is provided with an abutting member that comes into contact with a blocking member provided on a side plate located outside the side wall member of the cassette holder when the cassette holder does not abut the abutting portion.

With this configuration, when the cassette is not completely inserted into the cassette holder and the cassette and cassette holder are misaligned, the abutting member of the lock release member abuts the blocking member of the side plate, preventing the cassette holder from opening. Horizontal movement can be stopped, and as a result, it is possible to prevent deformation or damage to the equipment due to contact between the cassette lid and the equipment as in the conventional case, and furthermore, it is possible to prevent damage to the magnetic tape.

EXAMPLE Hereinafter, an example of the present invention will be explained using the drawings (Figs. 1 to 4).
The explanation will be based on Figure). The configuration of the cassette loading device itself is almost the same as that of the prior art example, and therefore the explanation here will be omitted, and only the parts that are different from the prior art example will be explained. In addition, in the drawings, members having the same names as those in the conventional example are given the same numbers, and explanations thereof will be omitted here.

Reference numeral 20 denotes a lock release member which is rotatably supported by the right side wall member 4 of the cassette holder 1, and has a rotation biasing force applied inward of the cassette holder 1 by a pressurizing portion 20a such as a spring; Lock contact portion 20b, contact portion 20
c and a flat portion 20d. Plane part 20d
The surface of the cassette 14 is configured such that it can come into contact with a portion of the lid 18 of the cassette 14 at a right angle or approximately at a right angle. The lock contact portion 20b is the lock release portion 1 of the lock plate 19 of the cassette 14.
9a. Further, the contact portion 20c contacts the side plate 2, and the lock release portion 19a of the locking means of the cassette 14 and the lock contact portion 20b of the lock release member 20.
It is possible to separate the two. Reference numeral 21 denotes an abutment member, which is provided integrally with the lock release member 20. Reference numeral 22 denotes a blocking member, which is integrally provided on the side plate 2.

Next, the operation of the above cassette loading device will be explained.

FIG. 2 shows the state of the cassette holder 1 in the first position where the cassette 14 can be attached to and detached from the cassette holder 1, and the contact portion 20c of the lock release member 20 is in contact with the side plate 2, 20 is in a state where it is rotated in the two directions of the arrow, and the lock abutting portion 20b and the cassette 1
The lock releasing portion 19a constituting the locking means 4 is separated or almost separated, so that the cassette 14 can be easily attached to and removed from the cassette holder 1. In this state, a gap a is maintained between the flat part 2a of the side plate 2 and the contact member 21 provided integrally with the lock release member 20, and they are not in contact with each other.

When the horizontal movement of the cassette holder 1 is started and the contact between the side plate 2 and the contact part 20c of the lock release member 20 is released, the lock release member 20 rotates the pressure part 20a as shown in FIG. The lock plate 19 rotates in the direction of the arrow shown in FIG. and lock plate 19
The lock portion 19b of the cassette 14 and the lock receiver of the cassette 14 are connected to the surface 18a.
The locking of the lid 18 of the cassette 14 is released.

In this state, a gap shown in FIG. 3 is maintained between the blocking member 22 integrally provided on the side plate 2 and the abutting member 21 integrally provided on the lock release member 20. The two do not come into contact. Therefore, the horizontal movement of the cassette holder 1 can be performed smoothly, and the cassette mounting operation can be completed in the same manner as in the conventional case.

Next, after continuing to push the cassette 14 with strong force to a position where the contact portion 20c of the side plate 2 and the lock release member 20 are separated from each other, if the pressing force is suddenly released, a reaction force is generated that causes the cassette holder 1 and The cassette 14 is returned to the ejection direction. As a result, the positional relationship between the cassette 14 and the cassette holder 1 shifts as shown in FIG. In other words, the lock contact portion 20b of the lock release member 20 is connected to the cassette 1.
4, but not in contact with the lock release part 19a of the cassette 14, but in the two directions indicated by the arrow, and comes into contact with the side surface part 14a of the cassette 14. When the horizontal movement of the cassette holder 1 continues in this state, the abutting member 21 of the lock release member 20 abuts against the blocking member 22 integrally provided on the side plate 2, and the cassette holder 1
The horizontal movement of is stopped.

As described above, according to this embodiment, the lock contact portion 20b of the lock release member 20 is connected to the lock release portion 19 of the cassette 14.
a, the abutment member 21 and the blocking member 2
2, the cassette holder 1 can be moved to the second position.

Further, after continuing to push the cassette 14 with a strong force to a position where the contact portion 20c of the side plate 2 and the lock release member 20 are separated, by suddenly releasing the pushing force, a reaction force is applied and the cassette is 14 is misaligned with respect to the cassette holder 1, the contact member 21 and the blocking member 22 come into contact with each other, the horizontal movement of the cassette holder 1 is stopped, and the cassette holder 1 cannot be moved to the second position. Can not. Therefore, unless the cassette holder 1 reaches the second position t, the device will not operate, and the cassette lid will not come into contact with the device, deforming or damaging the device or damaging the magnetic tape.

Effects of the Invention As described above, according to the present invention, when the cassette is not completely inserted into the cassette holder, the cassette lock release member comes into contact with the blocking member of the side plate and stops the horizontal movement of the cassette holder. As a result, it is possible to prevent deformation and damage to the device due to contact between the cassette lid and the device as in the conventional case, and furthermore, it is possible to prevent damage to the magnetic tape.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention.
The figure is a perspective view of the main part of the cassette mounting device, FIGS. 2 to 4 are top views for explaining the operation of the embodiment of the present invention, FIGS. 5 to 12 show a conventional example, and FIG. 6 is a perspective view of the main parts of the cassette mounting device, FIG. 7 is a side view of the cassette, FIG. 8 is a cross-sectional view of the main parts of the cassette, and FIG. 9 is a main part of the cassette. Side view, Figures 10 to 1
FIG. 2 is a top view for explaining the entire operation of the conventional example. 1...Cassette holder, 2...Side plate V-), 4
...Side wall member, 14...Cassette%18...li
, 19... Lock plate, 19a... Lock release part, 1
9b...Lock part, 20...Lock release member, 20
a... Pressure part, 20b... Lock contact part, 20c...
...Abutting portion, 21...Abutting member, 22...Blocking member. Agent Yoshihiro MorimotoFigure 3/4/Figure 4

Claims (1)

[Claims] 1. A cassette holder capable of removably holding a cassette having a locking means for locking an openable lid in a closed state is provided, and a lock release member is rotatably provided on a side wall member of the cassette holder to release the lock. The member includes a lock abutting portion capable of unlocking the cassette by coming into contact with a portion of the locking means of the cassette, and the lock abutting portion is capable of constantly abutting against a portion of the locking means of the cassette. A pressurizing part having a spring property that applies rotational force in the direction is provided, and when a part of the locking means of the cassette is not in contact with the lock abutting part of the lock release member, the side wall member of the cassette holder is A cassette mounting device including an abutting member that abuts a blocking member provided on an outer side plate.