JPH0664812B2 - Cassette mounting device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front loading type cassette mounting apparatus for a magnetic recording / reproducing apparatus.

2. Description of the Related Art In recent years, a cassette loading device for a cassette tape recording / reproducing device such as a video tape recorder (VTR) is mainly a front loading type in which a cassette is loaded from the front of the device. Hereinafter, an example of the above cassette mounting device will be described with reference to the drawings. 7 and 8 show the construction of a conventional cassette mounting device. In FIG. 7, reference numeral 1 is a cassette holder for storing a cassette, and 2, 2 '.
Is a leaf spring fixed on the top of the cassette holder 1, 3, 3 '
Is a side plate arranged on both sides of the cassette holder 1,
Reference numerals 4 and 4'are guide grooves provided on the side plates 3 and 3 ', which are usually composed of two or three pieces. 5,5 'are side wall members formed on one side of the cassette holder, and guide pins 6,6' are engaged with the guide grooves 4,4 'provided on the side plates 3,3'. The grooves are provided corresponding to the number of the grooves 4, 4 '. 7 and 8 are transmission gears connected by a shaft 9 and rotatably held on the side plates 3 and 3 ', and 9 and 10 are transmission gears 7 and 7, respectively.
A rotatable drive arm that is connected to 8 and is axially supported by the side plates 3, 3 ', and guide pins 6, 5' on the side wall members 5, 5'of the cassette holder 1 described above in guide grooves provided at the tip. 6'is
Each is engaged. A drive motor 11 drives the transmission gear 8 via the gear transmission mechanism 12. Reference numeral 13 is a top plate that connects the side plates 3 and 3 '. 27 is a cassette.

The operation of the conventional cassette mounting apparatus configured as described above will be described below.

When the cassette is inserted into the cassette holder 1 from the front side, the switch operates, the drive motor 11 starts rotating, and the drive arms 9 and 10 are rotated via the gear transmission mechanism 12 and the transmission gears 7 and 8. Therefore, the guide pins engaged with the guide grooves provided in the drive arms 9 and 10 and the one cassette holder 1 move along the guide grooves 4 and 4'of the side plates 3 and 3'to perform the cassette mounting operation. To complete. The leaf springs 2 and 2'have a movement to press the cassette when the cassette is inserted, and hold the cassette stably during the loading of the cassette.
Generally, in the case of the VHS method, when the cassette is completely installed, both sides operate to generate a pressing force of about 1 kg.

FIG. 8 shows a state in which the cassette is pressed. Since the leaf spring is pushed up by the cassette from the state before the cassette is inserted as shown by the broken line, the spring force due to the spring deformation is applied to the cassette. Will be.

Problems to be Solved by the Invention However, in the above configuration, since the cassette is inserted against the leaf spring force, it has to be inserted with a large force, which is not convenient. There is. In order to solve this problem, in the commercial VTR, the pressing member is divided into two parts on the left and right, and when the cassette is inserted, only the leaf spring force, which weakens the spring force, acts, and during the movement of the cassette holder. There is a structure in which a pressing member having a different structure acts so that a predetermined pressing force is applied. However, with this configuration, although the above problems can be solved, there is a problem that the number of parts increases and the cost increases. In view of the above problems, the present invention is such that a pressing member having a leaf spring is rotatably supported on a side wall of a cassette holder, and when the cassette is inserted, the cassette holder is moved from horizontal operation to vertical operation and from vertical operation to horizontal operation. Provided is a cassette mounting device having a cassette pressing mechanism which is held at a rotated position so that a spring force is reduced as compared with a case where a predetermined cassette is pressed in a transition section of a movement direction to an operation. .

Means for Solving the Problems In order to solve the above problems, a cassette mounting device of the present invention is a holding member for accommodating a cassette, and is rotatably mounted on both sides of the holding member, and the cassette is mounted when the cassette is mounted. And a guide member for contacting a guide piece provided on a part of the pressing member to restrict the rotational position of the pressing member over the entire moving region of the holding member. In addition, in the transition section of the moving direction of the holding member from the horizontal movement to the vertical movement and from the vertical movement to the horizontal movement, the rotation of the pressing member is restricted by setting a large gap between the guide member and the holding member. The guide member is configured so as to reduce the amount and the pressing of the cassette.

Effect The present invention has the above-described configuration to reduce the cassette pressing force against insertion of the cassette, which reduces the force required to insert the cassette, improves the feel and usability, and reduces the movement direction of the cassette holder. Even in the transition section, the pressing force of the cassette holder is reduced, so that the sliding frictional resistance generated as the cassette holder moves is reduced, and the smooth movement of the cassette holder can be obtained.

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 FIG. 1, 14 is a cassette holder as a holding member for accommodating a cassette, and 15 and 15 'are side walls integrally formed on both sides of the cassette holder 14, 1
6, 16 'are guide pins A, 17, 17' provided on the side walls 15, 15 '
Is a side plate arranged on both sides of the cassette holder 14,
Reference numerals 18, 18 'denote guide grooves A provided in the side plates 17, 17', respectively, which are constituted by two or three guide grooves A16,
16 'are engaged respectively. In addition, guide pins A16, 16 '
Needless to say, are provided corresponding to the number of guide grooves A18, 18 '. Reference numerals 19 and 19 'are shafts integrated with the side wall portions 15 and 15' on both sides of the cassette holder 14, and 20 and 20 'are L-shaped pressing members rotatably fitted to the shafts 19 and 19'. In the case of the embodiment of the present invention, the leaf springs 21 and 21 'are integrally formed. 22 and 22 'are rotatable rollers as guide pieces axially supported by the tips of the arms of the pressing member main bodies 20 and 20', and 23 and 23 'are L-shaped pressing members 20 and 20'. The guide pin B is provided at the tip of one arm. The rollers 22 and 2
2'is for reducing sliding resistance, and is not necessarily a roller. 24 and 24 'are side plates 1
7, 17 'is a guide wall as a guide member for restricting the rotational position of the pressing members 20, 20' over the entire movement area of the cassette holder 14, and 25, 25 'are engaged with guide pins B23, 23'. It is the guide groove B which is fitted. 26 is a side plate 17,1
It is a top plate connecting 7 '. The guide walls 24, 24 'provided on the side plates 17, 17' are the pressing members 20, 20 '.
Rollers 22 and 22 'provided on the guide wall 24,
Instead of 24 ', the upper plate 26 may be abutted.

Note that the configuration other than the above, including the drive system, is basically the same as that of the cassette mounting apparatus shown in the conventional example described in the prior art, and therefore the details are omitted.

The operation of the cassette mounting apparatus configured as described above will be described below with reference to FIGS.

First, FIG. 2 shows the state before the cassette is inserted, and the space between the guide wall 24 of the side plate 17 and the pressing member 20 is slightly larger. The guide pin 23B of the pressing member 20 is attached to the side plate through the square hole 27 provided in the side wall 15 of the cassette holder 1.
It engages with 17 guide grooves B25. The square hole 27 and the guide groove 25 have a sufficient gap with the guide pin 23, and the pressing member 20 has a space space in which it can rotate within a certain range. Third
The figure shows the state when the cassette is inserted. Although the cassette pushes up the leaf spring 21 and enters, the spring force is not applied to the cassette until the roller 22 contacts the guide wall 24, and the spring force is applied after the contact because the pressing member 20 rotates. Become. For the stability of the cassette at the time of insertion, a slight load should be applied, so that the position of the guide wall should be set appropriately.

FIG. 4 shows a state in which the cassette is being loaded and is in the middle of horizontal operation after the insertion is completed. Side wall 15 of cassette holder 14
The guide pin A16 provided on the guide plate is guided by the guide groove A18 provided on the side plate 17 to move the cassette holder 14 in the horizontal direction. At this time, since the guide wall 24 has a cam shape and is in a position to push down the roller 22, the position of the pressing member 20 is regulated so that a predetermined spring force is applied to the cassette.

FIG. 5 shows a state when the insertion of the cassette is completed. That is, the loading of the cassette is performed almost vertically after the horizontal operation is completed to complete a series of operations, but a state in which a predetermined spring force is applied to the cassette must be maintained throughout the series of operations. After the vertical movement of the cassette, the contact between the roller 22 and the guide wall 24 comes off, but instead, the guide pin B23 is replaced by the guide groove B25.
By abutting against, the regulation position of the pressing member 20 can be maintained.

FIG. 6 shows a state in which the cassette holder 14 is located in the transition section in the moving direction from the horizontal movement to the vertical movement. The cassette holder 14 has a guide groove A1 provided on the side plate 17.
Although being guided and moved by 8, the spring force applied to the cassette by the leaf spring 21 is generated between the guide pin A16 provided on the side wall 15 of the cassette holder 14 and the guide groove A18 provided on the side plate 17. In the transition section of the movement direction of the cassette holder 14, it inhibits the smooth movement of the cassette holder 14 in particular, so that the guide wall 24 reduces the spring force applied to the cassette in that section.
Is set so that the pushing position of the roller 22 is smaller than that in the normal horizontal movement of the cassette holder 14.
Similarly, the guide groove B25 provided in the side plate 17 is also provided in the normal cassette holder 14 so as to reduce the spring force applied to the cassette in the transition section of the movement direction of the cassette holder 14 from the horizontal operation to the vertical operation. The push-in position of the guide pin B23 is set to be smaller than that in the vertical operation. However, in order to stabilize the cassette, it is better that there is a load due to a slight spring force, so the positions of the guide wall 24 and the guide groove B25 should be set appropriately.

As described above, according to the present embodiment, the cassette pressing member is configured to be rotatable, and the means for restricting the rotational position is provided to reduce the insertion force when the cassette is inserted and to improve the feel. It is possible to provide a cassette mounting device that can obtain a smooth movement of the cassette holder.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to obtain an excellent effect that the insertion force at the time of inserting a cassette is reduced with a simple structure, the feeling of insertion is improved, and the cassette holder can be smoothly moved. 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 6 are configuration diagrams showing the operation of the present invention, and FIG.
FIG. 8 is a perspective view of a conventional cassette mounting device, and FIG. 8 is a configuration diagram showing details of a main part of a conventional example. 14 …… Cassette holder, 15,15 ′ …… Sidewall, 16,16 ′…
… Guide pins A, 17,17 ′ …… Side plates, 18,18 ′ ……
Guide groove A, 20, 20 '... pressing member, 21, 21' ... leaf spring,
22,22 '…… Roller, 23,23 ′ …… Guide pin B, 24,2
4 '... Guide wall, 25, 25' ... Guide groove B, 26 ... Top plate.

Claims (1)

[Claims] 1. A holding member for accommodating a cassette, and a pressing member rotatably mounted on both sides of the holding member and having a spring property for pressing the cassette when the cassette is mounted.
It has a guide member that abuts on a guide piece provided on a part of the pressing member to regulate the rotational position of the pressing member over the entire moving region of the holding member, and is vertical from the horizontal movement of the holding member. By setting a large gap between the guide member and the holding member in the transition section in the movement direction from the vertical movement to the horizontal movement, the amount of rotation restriction of the pressing member is reduced and the pressing of the cassette is reduced. A cassette mounting device, characterized in that the guide member is formed in the.