JPH0664807B2 - 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 loading apparatus that can be used in a magnetic recording / reproducing apparatus.

2. Description of the Related Art In recent years, a cassette loading device of a magnetic recording / reproducing apparatus has mainly used a front loading method in which a cassette is inserted from the front side. Hereinafter, an example of the above cassette mounting device will be described with reference to the drawings.

FIG. 7 and FIG. 8 show the outline of the construction and assembling method of a conventional cassette mounting device, respectively. First, in FIG. 7, reference numeral 1 is a cassette holder unit for holding a cassette. Reference numerals 2 and 3 denote side frames (hereinafter referred to as sand plates) arranged on both sides of the cassette holder unit 1, and L which guide pins 4, 5 and 6, 7 provided at both ends of the cassette holder unit 1 engage with. It is provided with V-shaped guide grooves 8, 9 and 10, 11.

Reference numerals 12 and 12 'are guide guide surfaces 15 for moving the guide pins 4 and 5 to the positions of the guide pins 13 and 14 indicated by the alternate long and short dash lines, respectively.
And 16 is a drive arm rotatably held on both sides of the side plates 2 and 3, and 16 is a drive motor, which is a relay gear via a worm transmission mechanism 17 and a worm wheel 18.
Drive 19 The relay gear 19 is fixed to a shaft 20 rotatably supported by the side plates 2 and 3, and meshes with the drive arm 12. The other relay gear 21 is fixed to the other side of the shaft 20.
Mesh with the drive arm 12 '. 22 is a cassette guide that guides the insertion of the cassette and also connects the side plates 2 and 3, and 23 is a top plate that connects the side plates 2 and 3 from above, and is provided to maintain the rigidity of the entire cassette mounting device. Has been.

The assembling method of the conventional cassette mounting device configured as described above will be described below. When assembling in the conventional apparatus, first, as shown in FIG. 8, the guide pins 4,5 and 6,7 provided at both ends of the cassette holder unit 1 are L-shaped guide grooves 8,9 provided in the side plates 2 and 3, respectively.
After being positioned vertically and forward and backward so as to engage with 10 and 11, respectively, the side plates 2 and 3 are fitted from both sides of the cassette holder unit. Generally, the cassette holder unit is fixed on a jig, and a pair of side plates 2 and 3 accurately placed on both sides of this jig are gradually slid inward to engage pins, etc. There is. At this time, of the drive system elements, the drive motor 16, the worm transmission mechanism 17, and the worm wheel 18 have already been unitized in the side plate 2, and therefore the assembly method thereof will be omitted here. Next, after fixing both ends of the cassette guide 22 to the side plates,
Pivot the drive arms 12 and 12 'on shafts provided on the side plates so that the guide guide surfaces 15 and 15' respectively engage a pair of guide pins at both ends of the cassette holder unit, for example, 4,5. Install freely. After that,
Insert the relay gear 21 press-fitted and fixed to one side so that the shaft 20 penetrates through the front side plates 2 and 3, and stop the relay gear 19 at the other end with an E ring or the like so that the drive arms are synchronized left and right. Engage the gears. Finally, the top plate
By 23, it is general that the assembly is completed by screwing with a screw or the like so that the strength and accuracy of the entire cassette mounting device is accurately maintained.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-described configuration, in order to engage the plurality of guide pins provided at both ends of the cassette holder unit through the L-shaped guide grooves of the left and right side plates during assembly, Since the cassette holder unit must be gradually slid from both sides to assemble, the large-scale and complicated assembling jig that requires accuracy and the assembling time are required.

Furthermore, there is a problem in workability that the shaft to which the relay gear is fixed must be inserted from the side and the relay gear at the other end must be aligned and attached.

In view of the above-mentioned problems, the present invention has a structure in which the cassette holder unit can be inserted from above, thereby significantly reducing the number of assembling steps and enabling the unit to be assembled on the magnetic recording / reproducing apparatus from the viewpoint of the assembling configuration. The present invention provides a cassette mounting device.

Means for Solving the Problems In order to solve the above problems, the cassette mounting device of the present invention is provided with recesses on the cassette receiving surface side of the cassette guide member, and the power transmission bar is inserted into the recesses from above. Then, when the side wall members are fixed thereafter, a part of the side wall members is positioned in the vicinity of the power transmission bar to form a bearing for the power transmission bar.

Operation Since the present invention can be assembled by inserting the power transmission bar and its bearing structure from above with the above-described configuration, the shaft to which the relay gear is fixed is inserted from the side as in the conventional case, and the other end There is no need for complicated assembly work on the side, which involves inserting and fixing the relay gears in phase. Also, since the drive member is fixed to both ends of the power transmission bar,
By holding the power transmission bar at a predetermined angle and then fixing both side wall members upward, the phase alignment between the power transmission member from the motor and the power transmission member can be easily performed.

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

FIG. 1 shows an outline of a cassette mounting apparatus according to an embodiment of the present invention. 25 is a cassette holder for holding the cassette, 26 and 27 are engagement pins 28, 29, 2 provided on the cassette holder 25.
A plurality of L-shaped guide grooves 30,3 that engage with 8 ', 29'
1 and 30 ', 31', both side wall members, and notches 32, 33, 32 ', 33' cut from the part having the L-shaped guide groove are formed in the upper portions of the both side wall members respectively. There is. Further, the side wall members 26, 27 are provided with claw portions 34, 34 'that engage with a holder guide member 44, which will be described later, projections 36, 36', and fixing hole portions 35, 35 ', and a fixing portion 37 for fixing screws. , 37 'are provided. 38 is the top plate, the top plate
38 is formed with protrusions 39, 40 and 39 ', 40' which are provided so as to be engaged with the notches of the side wall members 26, 27. Reference numerals 41 and 41 ′ have a shape that allows the engagement pins 28 and 28 ′ to be inserted from the tips, and are drive arms that are drive members of the cassette holder 25. Both drive arms are fixed to both ends of the power transmission bar 43. Has been done. Also, a part of the drive arm 41 has a gear part.
42 is provided to receive a driving force by a power transmission member (not shown).

44 is a cassette guide member, and leg-shaped members are provided at both ends thereof.
45, 45 'are provided, and the leg members 45, 45' are provided with bearing portions 47, 47 'having U-shaped recesses on the cassette receiving surface side of the cassette guide member, and side wall members 26, 27'. Claw portions 46, 46 'are provided at positions facing the fixing hole portions 35, 35'. 50 is a chassis, and the cassette guide member 44 is a screw
It is fixed by 48,49.

FIG. 2 shows a cross section taken along the line AA 'when the fixing hole portion 35 of the side wall member 26 is fitted into the claw portion 46 of the cassette guide member 44. FIG. 3 is a detailed view of the protruding portion 36 of the side wall member 26 shown in FIG. 1B, in which the claw portion 51 is formed. FIG. 4 shows C of FIG.
In the detailed view of the bearing portion 47 of the cassette guide member 44 in the arrow view,
A claw 52 is provided near the bearing. FIG. 5 is a view of FIG. 1D- when the protrusion 36 of the side wall member 26 is inserted into the bearing 47.
In the D'section, the claws 51 and 52 are shown locked.

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

The cassette mounting apparatus of the present embodiment configured as described above will be described with reference to FIG.

First, the cassette guide member 44 is fixed to the chassis 50 with screws 48 and 49, and then the power transmission bar 43 having the drive arms 41 and 41 'fixed to both ends is attached to the bearing portions 47 and 47' of the cassette guide member 44.
Insert from above. After that, the side wall members 26, 27 are inserted into the cassette guide member 44 from above, and the side wall projections 3
6,36 'and bearings 47,47', similarly fixing holes 35,35 'and claws
Fix so that 46 and 46 'fit together. Each of the above parts is locked and fixed as shown in FIGS. 2 and 5. This state is clear from the side view of FIG.
Is held by the projection 36 and the bearing 47, and is rotationally fixed.

After that, first, the openings of the drive arms 41, 41 'are notched 3
After rotating to the position opposite to 2, 32 ', the engaging pins 28, 29 and 28', 29 'of the cassette holder 25 are positioned in the notches 32, 33 and 32', 33 'of the side wall member. It is inserted from the upper side, and is engaged until the engaging pins 28, 29 and 28 ', 29' come into contact with the lower horizontal portions of the L-shaped guide grooves 30, 31 and 30 ', 31'. Next, the protrusions 39,4 on the top plate 38
0, 39 ', 40' are fitted so as to correspond to the notches 32, 33, 32 ', 33', respectively, until the lower end surface of the protrusion is flush with the upper end of the L-shaped groove. Press fit. This allows
All of the L-shaped guide grooves having the notches at the beginning can easily perform the same functions as the L-shaped guide grooves that have been conventionally configured.

As described above, according to the present embodiment, a bearing portion having a recess is provided on the cassette receiving surface side of the cassette guide member, and the power transmission bar is inserted into the bearing portion from above, and the rear side end wall members are attached to the cassette guide member. The bearing of the power transmission bar can be formed by fixing the bearing to the. Therefore, all can be assembled from above, and a large number of steps, that is, the manufacturing cost can be significantly reduced.

As described above, according to the present invention, the power transmission bar and its bearing structure can be easily assembled from above with a simple structure,
As compared with the conventional device, the assembling workability is improved, and the excellent effect that the manufacturing cost is low can be obtained.

[Brief description of drawings]

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 the line AA 'in FIG. 1, FIG. 3 is a detailed view of a B portion in FIG. 1, and FIG. 1 is a sectional view taken along the arrow C in FIG. 1, FIG. 5 is a sectional view taken along the line DD ′ in FIG. 1, FIG. 6 is a right side view of the completed assembly, and FIG. 7 is a perspective view of a conventional cassette loading device. ,
FIG. 8 is an exploded perspective view showing the assembled state of the conventional example. 26,27 ... Side wall member, 36, 36 '... Projection portion, 43 ... Power transmission bar, 44 ... Cassette guide member, 45, 45' ... Leg member, 47, 47 '... Bearing portion.

Claims (1)

[Claims] 1. A cassette guide member disposed in the vicinity of a cassette insertion port, and a second position for holding or holding the cassette, from a first position at which the cassette can be inserted, to a position at which the cassette can be recorded or reproduced, and A cassette holder that can be brought in the opposite direction, a side wall member that guides the movement of the cassette holder, and a cassette that is rotatably disposed near the side wall members to drive the cassette holder. A cassette mounting device comprising a holder drive member and a power transmission bar having the cassette holder drive members fixed to both ends thereof so that the movements of the one cassette holder drive member and the other cassette holder drive member are interlocked. The leg members are integrally formed on both sides of the cassette guide member so as to protrude from the cassette guide member. Further, each of the leg-shaped members is provided with a bearing portion having a concave portion on the cassette receiving surface side of the cassette guide member, the power transmission bar is inserted into the concave portion of the bearing portion, and a part of the both side wall members is A cassette mounting device, characterized in that the cassette mounting device is located near a power transmission bar located in a recess of each bearing portion.