JPH035039Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a device for attaching a mechanism chassis provided with a tape loading mechanism of a video tape recorder (VTR) to a main chassis.

(b) Prior Art Conventionally, as a method for attaching and fixing the mechanism chassis of a VTR to the main chassis, which is an exterior chassis, a mechanism chassis was installed on the main chassis as disclosed in Japanese Patent Application Laid-Open No. 160303/1983. It is generally placed on a raised boss and screwed into place from above.

(c) Problems to be solved by the invention According to the above-mentioned prior art, since the lower surface of the mechanism chassis and the upper surface of the boss are in close contact with each other without any gaps, the impact of the fall may cause deformation of the main chassis and damage to the upper surface of the mechanism chassis. Since the mechanism chassis was directly affected by the impact load acting on the cylinder attached to the cylinder, the mechanism chassis was easily deformed. In particular, the cylinder is provided with a guide groove for loading the video tape, but in order to downsize the mechanism chassis,
When the guide groove is shaped to extend to the end of the mechanism chassis, the mechanism chassis is significantly deformed by the impact of the drop.

(d) Means for Solving Problems The present invention includes a main chassis in which three long bosses and a short boss shorter than the long bosses are disposed, a cylinder is placed, and the long boss is in a first position. , directly at the second position and the third position, and a mechanism chassis which is screwed and fixed to the main chassis via a buffer member between the short boss and the screwing member at the fourth position, The first position and the second position are located at both front ends of the mechanism chassis, and the third position is located at both front ends of the mechanism chassis.
The fourth position is located at a rear end, and the fourth position is located at an end opposite to the side where the cylinder is arranged with respect to a perpendicular from the third position to a line connecting the first and second positions. It is characterized by

(E) Effect Since the present invention is constructed as described above, the impact force at the time of a fall is absorbed by the buffer member, the strength against the impact of a fall is improved, and the mechanism chassis can be made smaller and smaller by making the wall thickness of the mechanism chassis thinner. Weight reduction is achieved.

(f) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a side view of the device of this embodiment, and Fig. 2 is a side view of the device of this embodiment.
FIG. 3 is an enlarged view with a portion of the figure cut away, and FIG. 3 is a front view.

Reference numeral 1 denotes a cylinder 2, guide grooves 3 for guiding a guide pin (not shown) for winding the tape around the cylinder 2, and various members related to tape loading such as a reel stand, a capstan, and a pinch roller. (not shown), and as shown in Figure 3, the front (lower side in the drawing) left end (first position) and the front right end (second position).
Through-holes 4a and 4b for screw fixing are provided at the rear end (third position) and rear right end (fourth position) on the perpendicular bisector A of the line segment connecting the through-holes 4a and 4b. Through-holes 4c and 4d are also provided at positions 4c and 4d.
Note that the cylinder 2 is supported to the left of the perpendicular bisector A.

5 is a main chassis to which a transformer and various circuit boards (not shown) are fixed, and serves as the exterior chassis of the VTR itself. This main chassis 5
In this case, the long bosses 5a, 5a, 5a with a height of L face the through holes 4a, 4b, 4c, respectively, and the length of the bosses 5a, 5a, 5a with a length of C (c is 1 mm to
A short boss 5b, which is shorter by 2 mm), is formed by outsert molding so as to face the through hole 4d.

The mechanism chassis 1 is connected to the main chassis 5 by long bosses 5a, 5a, 5a and short bosses 5
b, screw the screws (threading members) 6, 7, 8 to the long bosses 5a, 5a, 5a from above through the through holes 4a, 4b, 4c, and then screw the screws (threading members) 6, 7, 8 to the long bosses 5a, 5a, 5a from above through the through holes 4a, 4b, 4c. A rubber cushion (buffer member) 9 with a hardness of #60 is passed through the through hole 4d between it and the upper surface of the mechanism chassis 1, and a screw (threaded member) 10 is screwed into the short boss 5b. , the mechanism chassis 1 is now fixed to the main chassis 5. In this case, the long bosses 5a, 5a, 5a
Only the upper surface contacts the lower surface of the mechanism chassis 1, and a gap c is created between the short boss 5b and the mechanism chassis 1 as shown in FIG. In addition, screws 6, 7, 8
is with a rim, and the screw 10 is without a rim.

When a drop impact load is applied to the mechanism chassis 1 integrated with the main chassis 5 as described above, most of the impact load is concentrated on the mounting portion of the cylinder 2 near which the guide grooves 3 are arranged. When a drop impact load is applied to the cylinder 2 mounting part from above, in FIG. The mechanical chassis 1 sinks downward to absorb the impact load, and when the impact load is removed, the mechanism chassis 1 restores its original shape due to its elasticity.
If this gap c is too small, the lower surface of the mechanism chassis 1 and the upper surface of the short boss 5b will come into contact with each other due to the impact, and the mechanism chassis 1 will be deformed so that the cylinder mounting part swells in the direction of the impact load. need to be made larger.

Next, when a downward drop impact load is applied to the cylinder 2 mounting part, completely contrary to the above, the mechanism chassis 1 will move upward with the screw 10 mounting part centered on the mounting part formed by the screw 8 and the long boss 5a. However, the rubber cushion 9 provided between the mechanism chassis 1 and the screw 10 absorbs the impact force. If this rubber cushion 9 is not present, connect the upper surface of the mechanism chassis 1 with the screw 10.
Since the head of the mechanism chassis 1 is in direct contact with the cylinder, the mechanism chassis 1 is deformed in such a way that the cylinder mounting portion bulges in the direction in which the impact load is applied.

(g) Effects of the invention As described above, according to the invention, the drop impact load concentrated on the cylinder mounting part of the mechanism chassis can be absorbed by the gap and the buffer member, so that the mechanism chassis itself can be absorbed without reducing its strength. The wall thickness of the mechanism can be reduced, and the guide groove near the cylinder can be extended to the end of the mechanism chassis, which is advantageous because the mechanism can be made smaller and lighter.

In addition to the deformation of the mechanism chassis due to the impact of dropping the VTR, the gap that occurs between the short boss and the mechanism chassis is also caused by the gap created when a worker lifts the semi-finished VTR product by hand during the VTR assembly process. It also has the role of preventing deformation of the mechanism chassis due to deformation of the main chassis.

[Brief explanation of the drawing]

The drawings all relate to one embodiment of the present invention, and FIG. 1 is a side view, FIG. 2 is an enlarged view with a portion of FIG. 1 cut away, and FIG. 3 is a front view. 1...Mechanism chassis, 2...Cylinder,
5...Main chassis, 5a...Long boss, 5b...
... Short boss, 6, 7, 8, 10... Screw (screw member), 9... Rubber cushion (buffer member).

Claims (1)

[Claims for Utility Model Registration] A main chassis in which at least three long bosses and a short boss shorter than the long bosses are disposed; a cylinder is placed thereon; a mechanism chassis that is screwed and fixed to the main chassis directly at the third position, and the short boss is screwed to the main chassis via a buffer member between the short boss and the screwing member at the fourth position; The second position is located at both front ends of the mechanism chassis, and the third position is located at both front ends of the mechanism chassis.
The fourth position is located at a rear end, and the fourth position is located at an end opposite to the side where the cylinder is arranged with respect to a perpendicular from the third position to a line connecting the first and second positions. A mechanism chassis mounting device characterized by: