JPH0664809B2 - 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 device used in a cassette type magnetic recording / reproducing device.

2. Description of the Related Art In recent years, a cassette loading device of 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 side. An example of the above cassette mounting device will be described below with reference to the drawings.

FIG. 5 shows the structure of a conventional cassette mounting device.

In FIG. 5, 1 is a cassette holder for accommodating cassettes, 2 and 2'are side plates arranged on both sides of the cassette holder 1, and 3 and 3'are L-shaped guides provided on the side plates 2 and 2 '. Grooves, usually composed of two or three each. 4,4 'are side wall members integrally formed on both sides of the cassette holder 1, and guide pins 5,5' which engage with the guide grooves 3,3 'provided on the side plates 2,2' are guide grooves. It is provided corresponding to the number of. 6,6 'are transmission gears connected by a shaft 7 and rotatably supported on the side plates 2,2', and 8,8'constitute gears meshing with the transmission gears 6,6 ', respectively. The main guide pins 5 on the side wall members 4, 4'of the cassette holder 1 are provided in the guide grooves 9, 9'provided at the ends by the rotatable drive arms axially supported by the plates 2, 2 ', respectively. 5'is engaged respectively. Reference numeral 10 is a drive motor fixed to the side plate 2 and drives the transmission gear 6 through a worm shaft 11 supported by the side plate 2 and a worm shaft 11 supported by the side plate 2 and connected to the motor output shaft by a joint. To do. Reference numeral 13 is a top plate that connects the side plates 2 and 2 '.

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

First, when a cassette (not shown) is inserted into the cassette holder 1 from the front side, a switch (not shown) operates, the drive motor 10 starts rotating, and the transmission gear 6 rotates via the worm 11 and the worm wheel 12. Transmission gear
The drive arms 8, 8'which are respectively meshed with 6, 6'are rotated. Therefore, the cassette holder 1 integrated with the guide pins 5, 5'engaged with the guide grooves 9, 9'provided in the drive arms 8, 8 '.
Moves from the horizontal movement to the vertical movement along the L-shaped guide grooves 3, 3'of the side plates 2, 2 ', and the cassette mounting operation is completed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, as described above, in general, the conventional cassette mounting device is equipped with a dedicated expensive drive motor, and further, a reduction gear device or the like is provided in order to achieve an appropriate rotation speed of the drive arm. It was usually equipped, and had the problem of high cost.

In view of the above problems, the present invention eliminates a dedicated drive motor, a reduction gear device, and the like on the premise that a capstan drive motor or the like of a magnetic recording / reproducing apparatus main body is generally used, and an inexpensive cassette having an extremely simple configuration. A mounting device is provided.

Means for Solving the Problems In order to solve the above problems, a cassette mounting device of the present invention comprises a cassette holding member capable of detachably holding a cassette and projecting projections on both side walls of the cassette holding member. The protrusion is movably inserted and guides the cassette holding member so that it can reciprocate between a first position where the cassette can be attached and detached and a second position where the cassette can be recorded or reproduced. A side plate having an L-shaped guide groove and a rotatable drive arm for driving the protrusion so as to bring the cassette holding member from the first position to the second position and in the opposite direction. And a cassette holder driving means having a side wall, and a substantially horizontal movement along a guide member provided on the side plate, and the cassette holder driving means can be rotated by a predetermined angle. And a slide member.

Operation The present invention provides an excellent cassette mounting device that enables a significant reduction in cost with the extremely simple configuration described above.

Examples Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows the structure of a cassette mounting apparatus according to an embodiment of the present invention. In FIG. 1, 14 is a cassette holder, 15 and 15 'are side walls integrally formed on both sides of the cassette holder 14, and 16 and 16' are both side walls 1 of the cassette holder 14.
Guide pins as protrusions protruding from 5,15 ', 17,1
Reference numeral 7'denotes side plates arranged on both sides of the cassette holder 14, and 18 and 18 'denote L-shaped guide grooves provided in the side plates 17 and 17', each of which is composed of two or three guide pins. , 16 'are engaged with each other. In addition, guide pin 16,
16 'are provided corresponding to the number of guide grooves 18, 18'. 1
9 and 19 'are drive arms that are connected by a shaft 20 and are rotatably supported by the side plates 17 and 17'.
The main guide pins 16, 16 'on the side wall members 15, 15' of the cassette holder 14 are engaged with 1, 21 ', respectively. One of the drive arms 19 or 19 'is a cassette drive means that is integrally formed with a gear 22 concentric with the shaft 20 and includes the shaft 20.
A slide member (hereinafter referred to as a rack) 23 has a guide groove formed so as to be horizontally movable by fitting with two guide pieces 24, 24 'provided on the side plate 17 or 17', and at one end thereof. From a number of teeth 25 that mesh with the gear 22, and the same number of teeth 26 as the teeth 25 that are formed in a region that does not mesh with the gear 22 that is integral with the drive arm 19 or 19 'at the other end bent in an L shape. Made of

27 is a switch element which is interlocked with the operation of the rack 23,
The switch body is fixed to the side plate 17 or 17 'for detecting the start and end of the operation stroke of the rack 23. 28
Is an output gear provided in the magnetic recording / reproducing apparatus main body,
When the cassette mounting apparatus according to this embodiment is attached to the magnetic recording / reproducing apparatus main body, it is meshed with the teeth 26 formed on the rack 23 in a state in which the phases are matched in advance.

Generally, a magnetic recording / reproducing apparatus requires various drive sources such as a capstan drive, a tape loading mechanism drive, a reel base drive, etc., but a dedicated motor or a single motor may be used depending on the required performance and cost. Various configurations have been put to practical use, such as having some functions combined. In general, in the case of also having a function, it is necessary to switch the size and direction of the output of the drive motor for each function by using various clutch mechanisms that also use means such as mechanical or electric solenoids.

FIG. 2 is a block diagram showing an example of a drive system of the magnetic recording / reproducing apparatus in this embodiment. In the case of this embodiment,
The figure shows the case where only capstan motor is used for all operations except cylinder. In FIG. 2, 29 is a direct drive capstan motor, 30 is a first reduction system, 31 is a second reduction system, 32 is a reel stand, 33 is a first clutch, and 34 has a kind of clutch function. Third reduction system,
35 is a fourth speed reduction system, 36 is a tape loading output system for tape loading operation, 37 is a second clutch, 38 is a fifth speed reduction system, 39 is an output system of a system for controlling the operation mode of each mechanism, Reference numeral 40 is a sixth reduction gear system, and 28 (see FIG. 3) is an output gear connected to the cassette mounting apparatus of this embodiment. It should be noted that the first clutch 33 is for switching operations such as cassette loading and tape loading and tape running operation, and is not shown between the first reduction gear system 30 and the second reduction gear system 31. However, there is a mechanism that connects or disconnects the rotation of the capstan motor in conjunction with the mechanical operation mode control system, so that it is connected when the tape is running. The drive system as described above may have various other configurations, but in the case of the present embodiment, it is the main idea to eliminate the drive motor dedicated to the cassette mounting device and use the drive source of the magnetic recording / reproducing device. Since the drive system itself is not the purpose, details regarding the drive system are omitted.

FIG. 3 and FIG. 4 are schematic side views of the main parts for explaining the operation of the cassette mounting device configured as described above. FIG. 3 shows a state before the cassette is inserted.

Now, when the output gear 28 rotates, the rack 23 moves in the direction of arrow a, and the drive arm 19 rotates in the direction of arrow b. That is, the cassette driving means is a means including a function of converting the linear motion of the rack 23 into a rotary motion. FIG. 4 shows a state in which the cassette is completely installed in the predetermined position.
The structure required for a series of operations, such as a mechanism for unlocking and opening the guard lid of the cassette and a mechanism for pressing the cassette when the cassette is completely mounted, is the same as the conventional structure, and the description thereof will be omitted.

As described above, according to the present embodiment, teeth are provided at one end of the rack which is provided in the magnetic recording / reproducing apparatus and which can be horizontally operated by meshing with the output gear that transmits the output of the drive motor for the magnetic recording / reproducing apparatus. By configuring the drive arm equipped with the gear so as to mesh with, it is possible to provide a simple and inexpensive cassette loading device capable of performing a series of cassette loading and ejecting operations without a dedicated motor.

In the above embodiment, the teeth provided on a part of the rack and the gear provided on the drive arm are directly meshed with each other, but this is through a gear train of at least one gear,
The same effect can be obtained even if they are meshed. For example, when the rack is horizontally moved in the direction opposite to the rotation direction of the gear provided on the drive arm and used, one gear may be engaged. Further, if the gear and the shaft provided on the drive arm cannot be formed concentrically, two or more gears may be meshed.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to obtain an excellent effect capable of making a great cost reduction with an extremely simple and inexpensive structure without a motor and a reduction gear system.

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette mounting apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram showing an example of a drive system of a magnetic recording / reproducing apparatus according to this embodiment, and FIGS. 3 and 4 show the present embodiment. FIG. 5 is a schematic side view of an essential part for explaining the operation of the example, and FIG. 5 is a perspective view showing the configuration of a conventional cassette mounting device. 14 …… Cassette holder, 15,15 ′ …… Sidewall, 17,17 ′…
… Side plate, 19,19 ′ …… Drive arm, 22 …… Gear, 23 …… Rack, 24,24 ′ …… Guide piece, 28 …… Output gear.

Claims (2)

[Claims] 1. A cassette holder capable of detachably holding a cassette, and projections provided on both side walls of the cassette holder so as to be movable, and the cassette holder can be detached from the cassette holder. A first side position and a side position plate having an L-shaped guide groove for guiding reciprocating movement between a second position where the cassette can be recorded or reproduced, and the cassette holder from the first position to the second position. Cassette holder drive means having a rotatable drive arm for driving the protrusion so as to bring it in the direction of the position and the opposite direction, and can be moved substantially horizontally along a guide member provided on the side plate And a cassette mounting device comprising a rack for rotating the cassette holder driving means by a predetermined angle. 2. The rack has a toothed portion over a region corresponding to a region which meshes with a gear provided on the cassette holder driving means to rotate the drive arm by a certain angle and a length corresponding to at least a rotation angle of the drive arm. The cassette mounting device according to claim 1, wherein the cassette mounting device is configured.