JPS6350957A - Cassette loader - Google Patents

Abstract

PURPOSE:To obtain the titled device in simple composition at low cost by rotating a driving arm directly by the rack equipped via a guide horizontally movably at one side of the side face plate arranged at both sides of the cassette holder containing a cassette. CONSTITUTION:The main guide pins 16, 16' above the side wall members 15, 15' of a cassette holder 14 are respectively engaged with the guide grooves 21, 21' of the tip of the driving arms 19, 19', which are supported freely rotatably on side face plates 17, 17' by being linked with a shaft 20. One part 19 or 19' of the driving arm integrally composes a gear 22 coaxially with the shaft 20. A rack 23 has the guide groove formed so as to be movable horizontally with the engagement of two guide pieces 24, 24' provided on the side face plate 17 or 17' and is composed of a 1st tooth 25 in several pieces biting with the gear 22 at one end thereof and a 2nd tooth 26 in the same pieces with the tooth 25 composed in the zone not biting with the gear 22 integral to the driving arm 19 or 19' of the other end part bent in L shape.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a front-loading type cassette mounting device in a cassette type magnetic recording/reproducing device.

BACKGROUND OF THE INVENTION In recent years, the mainstream of cassette loading devices for cassette tape recording and reproducing apparatuses such as video tape recorders (VTRs) is the front loading type in which the cassette is loaded from the front. An example of a conventional cassette loading device will be described below with reference to FIG.

In Fig. 6, 1 is a cassette holder that stores cassettes, 2.2' is a side plate placed on both sides of the cassette holder 1, and 3, 3' is a side plate (page 3) provided in an L-shape on 2, 2'. Each guide groove is usually composed of two or three guide grooves. 4 and 4' are side wall members integrally formed on both sides of the cassette holder 1;
Guide pins 6 and 6' are provided corresponding to the number of guide grooves, respectively, to engage with the guide grooves 3 and 3' provided in the aforementioned side plates 2 and 2'. 6 and 6' are transmission gears connected under the shaft and rotatably supported on the side plates) 2 and 2', 8 and 8' constitute gears meshing with the transmission gears 6 and 6', respectively, and The main guide pins on the side wall members 4 and 4' of the above-mentioned cassette holder 1 are inserted into the guide grooves 9 and 9' provided at the tips of the drive arms which are rotatably supported by shafts on the side plates 2 and 2', respectively. 6 and 6' are respectively engaged. Reference numeral 10 denotes a drive motor fixed to the side plate 2, which is connected to the motor output shaft by a joint and is connected to a transmission gear via a worm shaft 11 supported by the side plate 2 and a worm wheel 12 meshing with the worm. Drive 6. Reference numeral 13 denotes a top plate that connects the side plates 2° 2'.

The operation of the conventional cassette loading device configured as described above will be described below.

When a cassette is inserted into the cassette holder 1 from the front, a switch (not shown) is activated, the drive motor 10 starts rotating, rotates the transmission gear 6 via the worm 11 and the worm wheel 12, and then rotates the transmission gear 6. The drive arms 8, 8', which are in mesh with each other, are rotated.

Therefore, the cassette holder 1 is integral with the guide pins 6.6' engaged in the guide grooves 9, 9' provided in the drive arm 8.8'.
is the L-shaped guide groove 3.3' of the side plate 2, 2'.
The cassette mounting operation is completed by moving from a horizontal movement to a vertical movement along the .

Problems to be Solved by the Invention As mentioned in the above-mentioned conventional examples, conventional cassette mounting devices are generally equipped with a dedicated and expensive drive motor, and are further equipped with a reduction gear to maintain an appropriate rotation speed of the drive arm. It is common to have equipment, etc., which accounts for a large portion of the cost.

In view of the above-mentioned problems, the present invention utilizes the cab stan drive motor etc. of the main body of the magnetic recording/reproducing device, and eliminates the dedicated drive motor and reduction gear device, thereby achieving an extremely simple configuration. The present invention provides an inexpensive cassette mounting device.

Means for Solving the Problems In order to solve the above problems, the cassette mounting device of the present invention includes a cassette mounting device that includes a cassette holder that accommodates a cassette, and a cassette holder that accommodates a cassette. The drive arm is directly rotated by the equipped rack, and one end of the rack is provided with second teeth to mesh with the holder drive gear provided on the chassis, and the shaft of this holder drive gear is connected to the side plate. The drive arm is held by the holder to ensure reliable transmission between the holder drive gear shaft and the rack, and the drive arm is rotated by the first tooth at the other end.

Function: The present invention has the above-mentioned extremely simple configuration, which enables reliable power transmission and cost reduction by reducing the number of parts.

Embodiment 6 From page 6 onwards, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a cassette loading device according to an embodiment of the present invention. In Fig. 1, 14 is a cassette holder, 15.15' is a side wall integrally formed on both sides of the cassette holder 14, and 16°16' is a side wall 15.15'.
17. 17' are side plates arranged on both sides of the cassette holder 14, 18.18'
are L-shaped guide grooves provided on the side plates 17 and 17', each consisting of two or three guide grooves, each of which is engaged with the aforementioned guide pins 16 and 16'. It goes without saying that the number of guide pins 16, 16' corresponds to the number of guide grooves 18, 18'.

19.19' are connected by the shaft 20 and the side plates 17.
The drive arm is rotatably supported by the cassette holder 14 in the guide groove 21 and 21' provided at the tip.
main guide pins 16 on side wall members 16, 15' of
16' are respectively engaged. One of the drive arms, 19 or 19', integrally forms a gear 22 coaxially with the shaft 2.7 cm. Reference numeral 23 denotes a rack, which has a guide groove formed so as to be able to move horizontally by fitting into two guide pieces 24 and 24' provided on the side plate 17 or 17', and at one end thereof, the gear is attached. 22, and the same number of teeth 25 formed in the region of the L-shaped drive arm 19 or 19' that does not mesh with the integral gear 22 at the other end of the drive arm 19 or 19'. It consists of a second tooth 26 of.

Reference numeral 27 is a switch element that is linked to the operation of the rack 23 and detects the beginning and end of the operation stroke of the rack 23. The switch body is connected to the side plate 17. Or fixed at 17'.

Reference numeral 28 denotes a holder drive gear provided in the main body of the magnetic recording and reproducing apparatus, and when the cassette mounting apparatus of the present invention is attached to the main body of the magnetic recording and reproducing apparatus, the holder drive gear 28 is a holder drive gear that is arranged in the rack 23 in a state in which the phase is adjusted in advance. It is meshed with the second tooth 26.

FIG. 2 is a top view taken in the direction of arrow A in FIG. 1, where 29 is a holder drive gear shaft fixed to the chassis,
The head is held by a holding member 30 provided at the. FIG. 3 is a sectional view taken along line BB in FIG. 2.

FIGS. 4 and 6 are explanatory diagrams of the operation of the cassette loading device configured as described above. Now, when the holder drive gear 28 rotates and the claw 23 moves in the direction of the arrow a, the drive arm 19 rotates in the direction of the arrow. After that, when the cassette is completely installed in the predetermined position, it becomes as shown in FIG.

When the cassette is ejected, the operation is completely opposite to this. Additionally, if an abnormal condition occurs during these operations in which an external force is applied to the cassette holder and the operation is blocked, the second tooth 26 of the rack and the holder drive gear 28 will normally become separated. However, according to the configuration of this embodiment, since the holder drive gear shaft 29 is held in the radial direction by the holding member 30 of the Zide plate, the above-mentioned tooth skipping does not occur.

As described above, according to this embodiment, the shaft of the holder drive gear is fixed in the radial direction by the holding member of the side plate, and its teeth are connected to the second gear of the horizontally movable rack.
By arranging a drive arm equipped with a gear that meshes with the teeth of the rack and meshes with the first teeth of the other end of the rack, the cassette loading and ejecting sequence can be carried out without providing a dedicated drive motor. The operation can be performed reliably,
Furthermore, mechanisms such as reduction gears can be significantly simplified and manufactured at low cost.

Effects of the Invention As described above, according to the present invention, it is possible to realize a cassette loading device that can operate reliably with a simple configuration without requiring a motor or a speed reduction mechanism dedicated to cassette loading.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cassette and attachment device according to an embodiment of the present invention, FIG. 2 is a detailed top view taken in the direction of arrow A in FIG. 1, and FIG.
The drawings are a sectional view taken along line B--B in FIG. 2, FIGS. 4 and 6 are side views for explaining the operation of this embodiment, and FIG. 6 is a perspective view showing the structure of a conventional cassette loading device. 10 pages 14...Cassette holder, 17.17'...
...11111 plate, 19.19'...
Drive arm, 22... Gear, 23... Rack, 26... First tooth, 26... Second tooth, 28... Holder drive. Gear, 29... Holder drive gear shaft, 30... Holding member.

Claims (1)

[Claims] A cassette holding member for storing cassette tapes having a plurality of protrusions formed on side walls integrally provided on both sides, and a plurality of L-shaped guide grooves that engage with the protrusions arranged on both sides of the cassette holding member. a shaft having an arm rotatably supported by the side plate and having a guide groove on each side that engages with at least one of the protrusions, and one of the arms; a first tooth integrally configured with a gear concentrically with the shaft and configured in a region that meshes with the gear to rotate the arm at a certain angle; This cassette mounting device comprises a rack having second teeth at different positions that do not mesh with each other and is movable horizontally along a guide member provided on one side of the side plate, and a holder drive gear provided on the chassis. The second teeth of the rack and the holder driving gear are engaged when the side plate to which the rack is fixed is attached to the chassis from above, and the holding member provided on the side plate is engaged with the holder drive gear. A cassette mounting device characterized by being configured to hold a shaft of a drive gear.