JPS6058546B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a configuration of a mega section of a VTR and a method for assembling the same.

In conventional VTRs, each mechanical component is attached to a relatively large base, several frame members are attached to the base to form a frame, and a circuit board is attached to the frame and covered with an exterior member. It had a structure.

In such a structure, the assembly line must first introduce the base body onto the line and then assemble all the parts one after another, making the natural assembly line long.

Furthermore, when checking and adjusting mechanical parts during the assembly line and before installing circuit boards, etc., the base is large and heavy, making it difficult to manually set it aside. An object of the present invention is to provide a mechanical structure of a VTR that takes into consideration the simplification of the production process and prevents the drawbacks of the prior art described above, namely, the increase in the size of production equipment and the complexity of assembly work such as adjustment and checking. . In the present invention, the base body on which the mechanical part of the VTR is mounted is divided into two parts, and the drive device for rotating the take-up reel and feed reel of the tape cassette is mounted on the first base body, and the base body on which the mechanical part of the VTR is mounted is mounted on the first base body. A running route, etc., on which the magnetic tape pulled out from the tape cassette is stretched is placed. Furthermore, the frame of the set is integrally molded with resin, and the surfaces for holding the two base bodies described above are formed in this resin molded frame parallel to the main plane of the base body, and the two base bodies are attached and fixed with fastening screws. .

In addition, in order to position the two bases in the planar direction, a guide pin is provided on the second base, a hole that fits this guide pin is provided on the first base, and this part is fixed with a fastening screw. do.

Furthermore, positioning pins are also integrally formed on the resin molded frame to perform positioning with respect to the base body. An embodiment of the present invention will be described below with reference to the drawings. Figure 1 is a plan view showing the state in which the first base body and the second base body are attached to the resin molding frame, Figure 2 is a plan view showing the state in which only the second base body is attached, Figure 3, Figure 4. The figures are a plan view and a side view of the resin molding frame. A resin molded frame 6 in which the frame structure of the set is molded from resin includes positioning pins 1 for the first base 4.
and holes 6b1 for attaching the first base body 4 to the resin molding frame 6 with the fastening screws 2; the second base body 5 is also connected to the resin molding frame 6;
A hole 6a for mounting is provided (FIGS. 1 and 3). Further, surfaces 6d and 6c for holding the first base body 4 and the second base body 5 are provided parallel to each other on different levels (FIG. 3). As shown in FIG. 1, a push button 7, a feed reel stand 8, a take-up reel stand 9, a rewind roller 10, a fast-forward roller 11, and other drive mechanisms are mounted on the first base body 4, as shown in FIG. On the second base 5, as shown in FIG. 1, a tape running path such as a pinch roller 12, a capstan 16, a motor 1, an audio/control magnetic head 13, a rotating drum 15, etc. are mounted. The first base body 4 and the second base body 5 are assembled in advance as respective blocks, and each is individually checked for adjustment using a jig or the like.

When assembling, first, the second base body 5 is placed on the surface 6c of the resin molding frame 6, as shown in FIG. Next, the first base 4
is placed on the surface 6d, resulting in the state shown in FIG. At that time,
As shown in FIG. 6, the holes in the first base 4 fit into the positioning pins 1 provided on the resin molding frame 6, so that the position of the first base 4 with respect to the resin molding frame 6 is accurate. It can be decided. Further, as shown in FIG. 7, the hole of the first base body 4 fits into the mounting member 5a provided on the second base body 5, so that the first base body 4 and the second base body 5 are connected in a plane. The positional relationship is determined. The height of the mounting member 5a is different from that of the resin molding frame 6. Parallel surfaces 6c, 6
Similar to the step d, the parallelism between the first base 4 and the second base 5 is also maintained as shown in FIG. First, tighten the two 2" fastening screws (Figures 1 and 5) to connect the first base body 4 and the second base body 5, and then insert the first base body 4 into the hole 6b of the resin molding frame 6. Tighten the screws 2 at the parts shown in FIG. 1.Finally, tighten the screws into the holes 6a to obtain the state shown in FIG. It is designed so that it can be assembled only from the direction perpendicular to 6d.According to the present invention, by dividing the mechanical part into two blocks, each can be assembled on a sub-line, and furthermore, adjustments can be made with each block. Checks can be made.

Therefore, it becomes very easy to set aside the base body when assembling parts and checking adjustment, and these operations can be easily performed by hand, which has a great effect on improving productivity. Also, if the frame body to which the base bodies of these two blocks are attached is provided with a surface for holding the two base bodies parallel to the main plane of the base body, and this is integrally molded with resin, the planes of the two base bodies can also be configured accurately. I can do it.

In this way, the assembly line for the main body can be made relatively short by assembling two blocks that have been preassembled on a separate assembly line and have undergone adjustment checks to a frame integrally molded from resin. This also prevents the production equipment from becoming larger.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the mechanism of the VTR according to the present invention, Fig. 2 is a plan view showing an intermediate stage of assembly, Fig. 3 is a plan view of the resin molded frame, and Fig. 4 is the X direction in Fig. 3. 5 is a sectional view taken along line A-A" in FIG. 1, FIG. 6 is a sectional view taken along line BB" in FIG. 1, and FIG. 7 is a sectional view taken along line C-C" in FIG. 1. 1... positioning pin, 2... fastening screw, 4... first base body, 5... second base body,
6...Resin molding frame.

Claims (1)

[Scope of Claims] 1. A tape cassette having a take-up reel, a feed reel, and a wound magnetic tape with both ends fixed to the reels is loaded in a predetermined position and pulled out from there to a predetermined path. In a magnetic recording and reproducing device that performs recording and reproducing by running a magnetic tape at a constant speed, a drive device is mounted for rotationally driving a take-up reel and a feed reel in the tape cassette. one base body, a second base body on which is placed a running path on which a magnetic tape pulled out from the cassette is stretched, and main planes of the first and second base bodies are held parallel to each other; 1. A magnetic recording and reproducing device comprising a resin molded frame having a holding surface. 2. Item 1, wherein the resin molding frame is configured such that the main axes of the first and second base bodies, positioning pins and fastening screws with the resin molding frame are all arranged at right angles to the main plane of the base body. The magnetic recording and reproducing device described above.