JPH0529972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a front loading type cassette mounting device that can be used in a magnetic recording/reproducing device.

BACKGROUND OF THE INVENTION In recent years, a front loading system in which a cassette is inserted from the front has been mainly used as a cassette loading device for a magnetic recording/reproducing apparatus. Hereinafter, an example of the above-mentioned cassette mounting device will be explained with reference to the drawings.

FIGS. 7 and 8 each show an outline of the structure and assembly method of a conventional cassette mounting device. First, in FIG. 7, 1 is a cassette holder unit for holding a cassette.
Reference numerals 2 and 3 denote side frames (hereinafter referred to as side plates) arranged on both sides of the cassette holder unit 1; The guide grooves 8, 9 and 10, 11 are provided.

12 and 12' have guide surfaces 15 for moving the guide pins 4 and 5 to the positions of guide pins 13 and 14 shown by dashed lines, respectively, and are rotatably held on both sides of the side plates 2 and 3. A drive arm 16 is a drive motor that drives a relay gear 19 via a worm transmission mechanism 17 and a worm wheel 18. The relay gear 19 is fixed to a shaft 20 rotatably supported by the side plates 2 and 3, respectively, and is connected to the drive arm 12.
They are interlocked. Further, another relay gear 21 is fixed to the other side of the shaft 20, and the relay gear 21 meshes with the drive arm 12'. 2
2 is a cassette guide that guides the insertion of the cassette and connects the side plates 2 and 3;
A top plate 3 connects the side plates 2 and 3 from above, and is provided to maintain the rigidity of the entire cassette mounting device.

A method of assembling the conventional cassette mounting device constructed as described above will be described below. When assembling the conventional apparatus, first, as shown in FIG. After the side plates 2 and 3 are positioned vertically and longitudinally so as to engage with the cassette holder unit 10 and 11, respectively, the side plates 2 and 3 are inserted into the cassette holder unit from both sides. Generally, the cassette holder unit is fixed on a jig, and a pair of side plates 2 and 3 placed accurately on both sides of this jig are gradually slid inward and pins etc. are engaged to assemble the cassette holder unit. There is. At this time, among the drive system elements, the drive motor 1
6, the worm transmission mechanism 17, and the worm wheel 18 are already integrated into the side plate 2, so the method of assembling them will be omitted here. Next, the cassette guide 22
After fixing both ends of the drive arms 12 and 12' to the side plates, the drive arms 12 and 12' are guided by guide surfaces 15 and 15', respectively.
It is rotatably attached to a shaft provided on the side plate so as to engage with the side plate. After that, attach the relay gear 2 on one side.
Insert the shaft 20, which has been press-fitted and fixed, through both side plates 2 and 3, and stop the relay gear 19 at the other end with an E-ring, etc., and mesh the gears so that the left and right drive arms are synchronized. Let's do it. Finally, the top plate 23 is generally screwed onto the top plate 23 using screws or the like to maintain the strength and precision of the entire cassette mounting device, thereby completing the assembly.

Problems to be Solved by the Invention However, with the above configuration, during assembly, it is difficult to make the plurality of guide pins provided at both ends of the cassette holder unit penetrate and engage with the L-shaped guide grooves of the left and right side plates. Since the cassette holder unit must be assembled by gradually sliding it from both sides, there is a problem in that a large and complicated assembly jig that requires precision and a long assembly time are required.

Furthermore, the shaft to which the relay gear was fixed had to be inserted from the side, and the relay gear at the other end had to be aligned and installed, resulting in poor workability.

In view of the above problems, the present invention has a configuration in which the cassette holder unit can be inserted from the top, thereby significantly reducing the number of assembly steps.
The object of the present invention is to provide a cassette mounting device that allows the unit to be assembled on a magnetic recording/reproducing device in terms of its assembly structure.

Means for Solving the Problems In order to solve the above problems, the cassette mounting device of the present invention has a structure in which the cassette guide member is first fixed to the chassis, and then both side wall members are stacked and fixed on top of the cassette guide member. That is.

Effects The present invention has the above-described configuration, which allows all of the assembly of the cassette mounting device to be carried out from above, so that it is possible to easily assemble the cassette mounting device on the magnetic recording/reproducing device, which was previously thought to be difficult. This eliminates the need to assemble the cassette mounting device in a separate process and then attach it to the magnetic recording/reproducing device, making it possible to reduce transportation and man-hours.

Embodiments Hereinafter, embodiments of the cassette mounting device of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows a cassette mounting device according to an embodiment of the present invention. 25 is a cassette holder that holds a cassette; 26, 27 are engagement pins 28, 29, 28' provided on the cassette holder 25;
29' is a side wall member having a plurality of L-shaped guide grooves 30, 31 and 30', 31' that engage with the upper part of the both side wall members. cutout 32,
33, 32', 33' are formed. In addition, the side wall members 26 and 27 include claw portions 34 and 34' that engage with a holder guide member 44, which will be described later, and a protrusion 36,
36', fixing holes 35, 35', and fixing parts 37, 37' for fixing screws. 38 is a top plate, and the top plate 38 is formed with protrusions 39, 40 and 39', 40' that correspond to and engage with the notches of the side wall members 26, 27. 41,41'
is a drive arm which is a drive member of the cassette holder 1 and has a shape that allows the engagement pins 28, 28' to be inserted from the tip thereof, and both drive arms are fixed to both ends of the power transmission bar 43. Further, a gear portion 42 is provided in a part of the drive arm 41, and receives a driving force from a power transmission member (not shown).

Reference numeral 44 denotes a cassette guide member, and leg-like members 45, 45' are provided at both ends thereof, and bearings having U-shaped recesses on the cassette-receiving surface side of the cassette guide member are mounted on the leg-like members 45, 45'. Part 4
7, 47' are provided, and further side wall members 26, 2
Claw portions 46, 46' are provided at positions facing the fixing holes 35, 35' of No.7. 50 is a chassis to which a cassette guide member 44 is fixed with screws 48 and 49.

FIG. 2 shows A when the fixing hole 35 of the side wall member 26 is fitted into the claw portion 46 of the cassette guide member 44.
-A′ cross section is shown. FIG. 3 is a detailed view of the protrusion 36 of the side wall member 26 shown in FIG.
1 is formed. FIG. 4 is a detailed view of the bearing portion 47 of the cassette guide member 44 as viewed from arrow C in FIG. 1, and a pawl 52 is provided near the bearing portion. FIG. 5 shows that the projection 36 of the side wall member 26 is connected to the bearing 47.
This is a sectional view taken along line D-D' in Figure 1 when the claw 5 is inserted into the
1 and 52 are shown locked.

FIG. 6 is a right side view when the projection 36 of the side wall member 26 is inserted into the bearing 47.

The cassette mounting device of this embodiment constructed as described above will be explained with reference to FIG.

First, the cassette guide member 44 is fixed to the chassis 50 with screws 48, 49, and then the power transmission bar 43, which has drive arms 41, 41' fixed to both ends, is fixed from above the bearing parts 47, 47' of the cassette guide member 44. insert. Thereafter, the both side wall members 26, 27 are inserted into the cassette guide member 44 from above, and the protrusions 36, 36' and bearing parts 47, 47' of the side wall members as well as the fixing holes 35, 35' and the claw parts 46, 46' are aligned. Fix them so that they fit together. Each of the above parts is the second
It is locked and fixed as shown in Fig. 5. In this state, as is clear from the side view of FIG. 6, the power transmission bar 43 is held by the protrusion 36 and the bearing 47, and is rotationally fixed.

After that, first, the openings of the drive arms 41, 41' are rotated to a position opposite to the notches 32, 32', and then the engagement pin 2 of the cassette holder 25 is rotated.
8, 29 and 28', 29' are inserted from above so that they are located in the notches 32, 33 and 32', 33' of the side wall member, and the engaging pins 28, 29 and 28', 29' are L-shaped. The guide grooves 30, 31 and 30', 31' are engaged with each other until they come into contact with the lower horizontal portions thereof. Next, the protrusions 39, 40, 39', 40' of the top plate 38 are each cut out 3.
2, 33, 32', and 33', and press fit until the lower end surface of the protrusion is at the same height as the upper end of the L-shaped groove. As a result, the L-shaped guide groove, which originally had a notch, can easily function in the same manner as the conventional L-shaped guide groove.

As described above, according to this embodiment, a bearing portion having a recess is provided on the cassette receiving surface side of the cassette guide member, a power transmission bar is inserted into the bearing portion from above, and then both side wall members are attached to the cassette guide member. By fixing it, a bearing for the power transmission bar can be constructed. Therefore, everything can be assembled from above, and many man-hours, ie, manufacturing costs, can be significantly reduced.

Effects of the Invention As described above, according to the present invention, the cassette holder can be easily assembled from the top with a simple structure, and compared to conventional devices, the assembly work efficiency is improved and the manufacturing cost can be reduced. You can get excellent results.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a cassette mounting device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. The figure is a view taken from arrow C in Fig. 1, Fig. 5 is a sectional view taken along the line D-D' in Fig. 1, Fig. 6 is a right side view when the assembly is completed, and Fig. 7 is a perspective view of a conventional cassette loading device. 8 are exploded perspective views showing the assembled state of the conventional example. 1...Cassette holder unit, 2, 3...
Side plate, 4, 5, 6, 7...engaging pin,
8, 9, 10, 11...L-shaped guide groove, 12,
12'...drive arm, 22...cassette guide,
23...Top plate, 24, 24', 25,
25'...Notch, 26, 26', 27, 27'...
...Top plate protrusion, 28... Chassis.

Claims (1)

[Scope of Claims] 1. A cassette guide member disposed near the cassette insertion slot and fixed to the chassis, a cassette holder for holding and moving the cassette, and both sides for guiding the movement of the cassette holder. A cassette mounting device comprising a wall member, a bearing portion having a U-shaped recess provided in the cassette guide member, a power transmission bar inserted into the bearing portion from above, and the side wall members. a first engaging portion for engaging at least one portion of the side wall member with the cassette guide member from above, and a second engaging portion for engaging at least one other portion of the side wall member with the chassis from the top. A cassette loading device comprising: 2. The cassette mounting device according to claim 1, wherein the cassette guide member and both side wall members are fitted and fixed.