JPS6364664A - Cassette loader - Google Patents

Abstract

PURPOSE:To prevent the displacement of a cassette holder by abutting the side face plate located at the outside of a cassette holder side wall member at the time when the cassette holder is located at a 1st position enabling the attachment and detachment of a cassette. CONSTITUTION:The abutment part 20c of a lock releasing member 20 abuts a side face plate 2 at the 1st position where a cassette 14 can be attached and detached to a cassette holder 1, the release member 20 is rotated, a lock abutment part 20b and the lock release part 19a composing the lock means of the cassette 14 attain to the state of being separated or nearly separated and the state of enabling the cassette 14 to attach and detach to the cassette holder 1 easily is attained. When the abutment of the side face plate 2 to the releasing member abutment part 20c is released with the start of the horizontal movement of the holder 1, the releasing member 20 is rotated by the rotary force of a pressurizing part 20a, a lock abutment part 13b abuts the lock release part 19a, the engagement of the lock part and lock receiving face 18a is released with the rotation of a lock plate 19 and the lock of the cover 18 of the cassette 14 is released.

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 devices 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 the above-mentioned cassette mounting device will be described below with reference to the drawings.

FIG. 4 shows the configuration of a conventional cassette loading device. In Fig. 7, 1 is a cassette holder for storing cassettes, 2 and 2' are side plates arranged on both sides of the cassette holder 1, and 3 and 3' are L-shaped plates provided on the side plates. These guide grooves are usually composed of two or three guide grooves. Reference numerals 4 and 4' designate side wall members on both sides of the cassette holder 1, each having guide pins 5 and 5' that engage with the guide grooves 3 and 3' provided in the aforementioned side plate 2 and 2', respectively. are provided corresponding to the number of guide grooves. 6, 6' are connected by shaft 7, side play) 2.2
The transmission gears 8.8' are rotatably supported by the transmission gears 6 and 6', and the transmission gears 8.8' are in mesh with the transmission gears 6 and 6', respectively, and the side play) 2.2
The cassette holder 1 is connected to the guide groove 9 and 9' provided at the tip of the drive arm, which is rotatably supported by the respective shafts.
The main guide pins 5, 5' on the side wall members 4, 4' of are engaged, respectively. 1Q is a drive motor that drives the transmission gear 6 or 6' via the gear transmission mechanism 11. Reference numeral 12 denotes a top plate that connects the side plates 2 and 2'.

1a is a pressure spring provided on the upper surface of the cassette holder 1.

Next, Figure 5 shows the configuration of a part of the cassette holder.
Reference numeral 3 designates a lock release lever that is rotatably supported by the right side wall member 4 of the cassette holder 1 and is biased to rotate inward of the sword set holder 1 by a spring 13a.

The lock release lever 13 unlocks the lid of the cassette by coming into contact with a part of the locking means of the cassette, which will be described later.The lock release lever 13 is rotated by contacting the lock contact portion 13b and the side plate 2. contact portion 13
c is integrally formed.

Next, the cassette to be inserted into the cassette holder 1 will be explained using FIGS. 6 to 8. The cassette 14 consists of a cassette housing 17 formed by combining an upper part 715 and a lower part 716 and fixing them with screws, a lid 18 that covers the front opening of the cassette and protects the magnetic tape inside, and a lid 18. It is composed of a lock plate 19 that locks the lid in the closed state.

The lock plate 19 has a lock release portion 19a10 and a lock portion 19b.
A rotating shaft 19C is integrally formed, and is supported by the lower half 16 so as to be rotatable about the rotating shaft 19C in the direction of arrow A and in the mouth direction.

19d is a spring provided on the rotation shaft 19c of the lock plate 19, which constantly applies rotation force to the lock plate 19 in the direction of arrow A. The lid 18 is normally configured such that the locking portion 19b and the lock holder of the lid 18 can be engaged with the surface 18a, and cannot be opened in the direction indicated by the arrow.

To open the lid 18 in the direction indicated by the arrow, press the unlocking part of the lock plate 19 in the direction indicated by the arrow, and the lock holder of the lid 18 should be opened on surface 1.
8a and the lock portion 19a of the lock plate 19 are disengaged.

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

FIG. 9 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. is rotated in the two directions of the arrows, and the lock abutting portion 13b and the unlocking portion 19a of the cassette 14 are separated from each other, resulting in a state t, in which the cassette 14 can be easily attached to and removed from the cassette holder 1. .

When the force center holder 1 is in the first position, the cassette 14
When the cassette holder 1 is inserted into the cassette holder 1 from the front in the direction of arrow B, the switch is activated and the drive motor 10 starts rotating, rotating the drive arms 8 and 8' 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' which are engaged with the guide grooves 9, 9' provided in the drive arms 8, 8' is connected to the guide grooves 3, 3' of the side plates 2, 2'. The cassette holder 1 moves from a horizontal movement to a vertical movement along the cassette holder 1 to complete the cassette loading operation, 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 by the spring 13a as shown in FIG.
The lock abutting portion 13 rotates in the direction of arrow H due to the rotational force of
b comes into contact with the cassette 140 opening lock release part 19a, and the lock plate 19 rotates in the direction of the arrow (see Fig. 7), and then
The lock 119b of the cover plate 19 and the lock receiver of the cassette 140 are disengaged from the surface 19a, and the lid 180 of the cassette 1A is released.
The lock will be released.

Problems to be Solved by the Invention However, when inserting a cassette with the above configuration, the cassette is continuously inserted with strong force until the contact part of the side plate and the lock release lever are separated, and then suddenly When the pressing force is released, the cassette holder and cassette are returned to the ejection direction as a reaction force. As a result, as shown in Fig. 11, the positional relationship between the cassette and the cassette holder is misaligned (the lock abutment, the contact part and the unlocking part of the cassette come into contact with each other), and the cassette cannot be completely installed. Ta.

In order to solve the above problem, the spring force of the pressure spring provided on the top surface of the cassette 7) holder can be strengthened to strengthen the holding force of the cassette. The problem is that the load increases when inserting the cassette into the cassette holder, making it extremely difficult to use.

In view of the above-mentioned problems, the present invention has been developed to prevent the cassette from being inserted even if the cassette is continuously inserted with strong force until the contact part of the lock release lever and the side plate are separated, and then the pressing force is suddenly released. The present invention provides a cassette loading device that can be fully loaded and that can place the cassette holder in a second position.

Means for Solving the Problems In order to solve the above problems, the cassette mounting device of the present invention includes a cassette holder capable of removably holding a cassette and having a locking means for locking an openable lid into a closed state. , a lock abutting part rotatably provided on a side wall member of the cassette holder and capable of unlocking the cassette by abutting a part of the cassette locking means; Right angle, =! the cassette holder includes a flat surface that can be brought into contact with the cassette holder at a substantially right angle; When the cassette is in the detachable first position or the first position, the cassette locking means and the lock are brought into contact with a side plate located on the outside of the cassette holder side wall member. The lock release member includes a contact portion that can separate the contact portions from each other.

Function The present invention can significantly reduce the occurrence of misalignment between the cassette holder and the cassette without increasing the insertion force for inserting the cassette into the cassette holder, and the cassette can be reliably mounted.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. The configuration of the cassette mounting device itself is almost the same as that of the conventional example, so a description thereof will be omitted here, and only the parts that are different from the conventional example will be explained. In the drawings, members with the same names as those in the conventional example are given the same numbers, and explanations here will be omitted.

Reference numeral 20 denotes a lower release lever which is rotatably supported by the right side wall member 4 of the cassette holder 1, and to which a rotation biasing force is applied inward of the cassette holder 1 by a pressure member 2Qa such as a spring. The members are provided with a lock contact portion 20b, a contact portion 20C2, and a flat portion 20d. Plane part 2
The surface 0d is configured to abut at a right angle or approximately at a right angle to a portion of the lid 18 of the cassette 14.

The lock contact portion 20b can contact the lock release portion 19a of the lock plate 19 of the cassette 14. The contact portion 20c is configured to contact the side foot 2 and to separate the lock release portion 19a of the locking means of the cassette from the lock contact portion 2ob of the lock release member 20.

Next, the operation of the 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.
When the lock release member 20 comes into contact with the cassette 14, the lock release member 20 is rotated in the two directions of the arrows, and the lock contact portion 20b and the cassette 14 are rotated.
The lock releasing part 19a constituting the locking means of the cassette 1 is separated or slightly separated from the cassette 1.
4 can be attached to and detached from the cassette holder 1.

When the horizontal movement of the cassette holder 1 is started and the contact between the side plate 2 and the contact portion 20c of the lock release member 2o is released, the lock release member 20 moves as shown in FIG.
The rotation force of the pressurizing part 20a rotates in the direction of the arrow H, and the lock contact part 13b comes into contact with the lock release part 19a, which is a part of the locking means of the cassette 4, and the lock plate 19 moves in the direction of the arrow in FIG. Rotating in the opening direction, the lock part 19b of the lock plate 1a and the lock receiver of the cassette 14 are disengaged from the surface 18a, and the lid 18 of the cassette 14 is unlocked.

As described above, according to this embodiment, the flat part constituting the lock release member is configured to be perpendicular or substantially perpendicular to a part of the lid of the cassette, and the cassette/y is unlocked from the side plate. Even if the cassette continues to be inserted with a strong force until the contact part of the lever is separated from the cassette holder, the pressing force is suddenly released, and a reaction force is applied, causing the cassette to shift relative to the cassette holder. Since the flat part of the lock release member is at right angles or almost right angles to the lid of the cassette, the cassette is stopped by the flat part, and it is possible to prevent the cassette and the cassette holder from being misaligned;
The cassette can be fully loaded.

Effects of the Invention As described above, according to the present invention, the cassette and the cassette holder can be prevented from being misaligned with a simple structure, and the cassette can be completely mounted.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of a cassette loading device according to an embodiment of the present invention, FIGS. 2 and 3 are top views showing the operation of the embodiment of the present invention, and FIG. 4 is a diagram showing the present embodiment and a conventional example. Fig. 5 is a perspective view of the main parts of the conventional cassette mounting apparatus, Fig. 6 is a side view of the cassette, Fig. 7 is a sectional top view of the main parts of the cassette, and Fig. 8 is a perspective view of the main parts of the cassette. Main part side views and FIGS. 9 to 11 are top views for explaining the operation of the conventional example. 1...Cassette holder, 2...Side plate, 4...Side wall member, 14...
Cassette, 18... Lid 19... Lock release part, 20... Lock release member 20 a...
...Pressure part, 20b...Lock contact part, 2
o: Contact portion, 20d: Plane portion. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
x7 Plane part Fig. 5 Fig. 6 Fig. 4 Fig. 7 Fig. 8 Exit

Claims (1)

[Claims] a cassette holder capable of removably holding a cassette, the cassette holder having a locking means for locking an openable/closable lid in a closed state; a lock abutting part that can unlock the cassette by abutting against it; a flat part that can abut at right angles or nearly right angles to a part of the lid of the cassette; When the cassette holder and the cassette holder are in the first position or approximately the first position in which the cassette can be attached and detached, the cassette A lock release member is provided that includes a contact portion that can separate a part of the locking means of the cassette and the lock contact portion by contacting a side plate located on the outside of the holder side wall member. A cassette loading device.