JP3009007U - Video tape recorder mode switching device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a mode switching device for a video tape recorder in which the number of parts is reduced, assembly is facilitated, and cost is reduced. [Structure] The fulcrum support shaft of the arm 4 for moving the gear up and down for mode switching is omitted, and notches 6 are provided on both sides of the arm 4.
And are fitted to the cylindrical projections 5 provided on both sides of the bracket 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a mode switching device of a video tape recorder.

[0002]

[Prior art]

 As shown in FIG. 2, the conventional mode switching device for a video tape recorder has fitting holes 13 at both ends of the substrate 1 and the bracket 12, and fitting holes 15 at both ends of the arm 14 to fit these. The arm support shaft 16 was passed through the hole, and the stopper washer 17 was used to prevent it from coming off. Then, by swinging the arm in the vertical direction, the driven gear (not shown) was moved in the gear support shaft direction to switch the mode.

[0003]

[Problems to be solved by the device]

 However, in the case of the conventional mode switching device as described above, there is a problem that it is difficult to align the fitting holes 13 and 15 into which the arm support shaft 16 is inserted, and it takes a long time to assemble. Further, since the arm support shaft 16 and the stop washer 17 are required, there is a problem that the cost is high.

The present invention has been made in order to solve these problems, and an object thereof is to reduce the manufacturing cost by omitting the arm support shaft by fitting the connecting portion of the arm and the bracket. It is in.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the means adopted by the present invention is, as shown in FIG. 1, that a drive gear 7 integral with a spline shaft 8 is loosely fitted to a gear support shaft 3 fixed vertically to a substrate 1, A driven gear 9 which is movable in the axial direction is spline-fitted to the shaft, a bracket 2 is integrally formed on the base plate 1, and cylindrical protrusions 5 are integrally formed on both side ends of the bracket. The notches 6 to be fitted are provided at both ends of the arm 4, and the width of the inlet of the notches 6 is made slightly smaller than the outer diameter of the cylindrical projection to form a retaining portion.

[0006]

[Action]

 The outer dimensions of the notches on both ends of the arm 4 shown in FIG. 1 are slightly narrower than the inner dimensions of the bracket 2, and when the arm notches 6 are press-fitted into the columnar protrusions 5, the arms 4 and the bracket 2 become one body. Swings around the cylindrical protrusion 5 of the bracket 2 as a fulcrum. Since the width of the entrance of the notch 6 is slightly narrower than the outer diameter of the cylindrical protrusion 5, the arm 4 does not come out of the cylindrical protrusion 5.

Since the arm support shaft and the stop washer can be omitted in this way, the cost of the entire apparatus can be reduced.

[0008]

【Example】

 The present invention will be described based on an embodiment shown in the drawings. FIG. 1 is an assembled perspective view of a video tape recorder mode switching device of the present invention. A drive gear 7 and a driven gear 9 are spline-fitted from a base plate 1 to a gear support shaft 3 fixed vertically, and a spring 10 and a stopper washer 11 prevent the drive gear 7 from coming off.

The cylindrical projection 5 of the bracket 2 has a length of 0.8 mm and an outer diameter of 1.5 mm, and is molded by doweling. On the other hand, the cutout portion 6 of the arm 4 has a hole diameter of 1.6 mm and an inlet portion width of 1.4 mm, and is formed by punching. When the notch 6 of the arm 4 is press-fitted into the columnar protrusion 5, the arm 4 swings around the columnar protrusion 5 as a fulcrum and does not come out of the bracket 2.

By the vertical movement of the arm 4, the driven gear 9 is moved up and down against the spring force to switch the mode of the video tape recorder.

[0011]

[Effect of the Invention] As described above, the mode switching device of the video ray recorder according to the present invention has a simple structure in which the arm support shaft and the stop washer are omitted. Therefore, the number of parts is reduced and the assembling work is simplified. It has an excellent effect of reducing the cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing assembly of parts according to an embodiment of the present invention,

FIG. 2 is a perspective view showing conventional assembly of parts,

[Explanation of symbols]

1: substrate, 2: bracket, 3: gear support shaft, 4: arm, 5: cylindrical protrusion, 6: notch, 7: drive gear,
8: Spline shaft, 9: Driven gear, 10: Cylindrical protrusion, 11: Stop washer, 12: Bracket, 1
3: Fitting hole, 14: Arm, 15: Fitting hole, 16: Arm support shaft

Claims (1)

[Scope of utility model registration request] 1. A drive gear (7) integral with a spline shaft (8) is loosely fitted to a gear support shaft (3) fixed vertically to a base plate (1), and a driven gear (9) of the spline shaft is attached. A bracket (2) is integrally formed on the base plate by spline fitting so as to be movable in the axial direction, and an arm (4) is attached to the bracket so as to be vertically swingable, and the driven gear is vertically moved by the arm. In the mode switching device configured to switch modes of the video tape recorder, columnar protrusions (5) are integrally formed at both end portions of the bracket to which the arm is attached, and both end portions of the arm to be attached to the bracket are formed. Is provided with a notch portion (6) rotatably fitted to the cylindrical protrusion,
The width of the entrance of the notch is made slightly narrower than the outer diameter of the cylindrical protrusion to form a retaining portion, and the retaining protrusion prevents the cylindrical protrusion from coming off once fitted. A mode switching device for a video tape recorder, which is characterized in that