JPH0138328Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Subject of invention) The present invention relates to a flywheel support device.

(Purpose of the invention) The present invention provides a flywheel support device that improves the efficiency of the fixing work of the support member when fixing the support member that supports the flywheel to a substrate, and that can easily reduce the cost. The purpose is to provide

(Contents of Conventional Examples and Their Disadvantages) Generally, a drive mechanism of a tape recorder is provided with a flywheel in order to smooth out uneven rotation of the drive system and reduce wow and flutter. Furthermore, among tape recorders, especially cassette tape recorders that perform recording and playback of cassette tapes, in recent years, even when one side of the cassette tape ends during recording and playback, the cassette tape cannot be manually removed and reversed. Many so-called auto-reverse type cassette tape recorders have appeared that are capable of recording and playing back the back side of a cassette tape. This auto-reverse type tape recorder is usually provided with two capstans. Furthermore, even if the recorder is not an auto-reverse type, some cassette tape recorders are equipped with two capstans, such as a double capstan type, for performance reasons. The flywheel is attached to these capstans, which are supported by bearings. Although the capstan is positioned in the rotational direction, there is not much regulation in the vertical direction, so if the capstan moves up and down during tape recording and playback, the level during recording and playback will fluctuate. arise. Furthermore, unless a support member is provided either above or below the shaft to support the capstan to which the flywheel is attached, the flywheel may come into contact with the substrate or the like.
Therefore, it is necessary to provide a support member between the board and the capstan to support the capstan to which the flywheel is attached and to position it in the vertical direction. Various methods have been adopted for fixing the support member for supporting the flywheel to the board to support the capstan to which the flywheel is attached, but in all cases, the structure is complicated. Since it is necessary to use one support member for each capstan and fix it by screwing or the like, it takes a long time and has the disadvantage that it is difficult to reduce the price.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a bearing hole in the center, and two supporting portions are provided at opposite positions centering on the bearing hole. A substrate having a hole and two holes for a fixing part having protrusions for locking at opposing positions centering on the bearing hole, and engaging with the bearing hole in the center part. 2 having a shaft and supporting a capstan with a flywheel attached around the shaft;
two supporting parts are arranged at positions corresponding to the holes for the supporting parts, and two fixing parts having claws for fixing the thrust plate main body to the substrate are arranged at positions corresponding to the holes for the fixing parts. and a thrust plate that integrally constitutes the supporting part and the fixing part, and when the thrust plate is attached to the substrate, the thrust plate is rotated about the axis to be attached to the fixing part. After the claw provided in the fixing part moves over the locking protrusion provided in the hole for the fixing part and moves to the fixed position, the claw provided in the fixing part is rotated by the locking protrusion. The present invention provides a flywheel device in which movement is prevented, the thrust plate is fixed to the substrate, and the support portion supports a capstan to which the flywheel is attached.

(Embodiment of the invention) FIGS. 1 and 2 are diagrams for explaining an embodiment of the flywheel support device of the invention. FIG. 1 is a plan view for explaining the attachment of the substrate and the thrust plate, and FIG. 2 is a side view for explaining the attachment of the substrate and the thrust plate.

In FIG. 1, 1 is a substrate, 1a and 1a' are deformed square holes for supporting parts of a thrust plate, which will be described later, and 1
b, 1b' are deformed square holes for the fixing part of the thrust plate which will be described later, 1c is a round hole for the bearing, 1d, 1
d' is a protrusion for locking, 2 is a thrust plate, 2
a, 2a' are supporting parts, 2b, 2b' are fixed parts, 2d,
2d' is a locking pawl, 3 is a flywheel, and 4 is a capstan.

As shown in FIG. 1, the substrate 1 is provided with deformed square holes 1a and 1a' and 1b and 1b' at opposing positions, respectively, with the round hole 1c as the center. The thrust plate 2 has a mounting shaft 2c as its center.
The supporting parts 2a and 2a' and the fixed parts 2b and 2b' are arranged at opposing positions, respectively, and the shaft 2c and the supporting part 2
a, 2a' and fixing parts 2b, 2b' are integrally constructed, and as shown in FIG. 2, the thrust plate 2 is adapted to be attached to the lower part of the base plate 1. The supporting parts 2a, 2a' and the fixing parts 2b, 2b' of the thrust plate 2 are configured to appear on the upper surface of the substrate 1. Insert the shaft 2c of the thrust plate 2 into the round hole 1c of the base plate 1 at the position shown by the two-dot chain line in FIG.
a, 2a' into the deformed square holes 1a, 1a' of the board 1, and the fixing parts 2b, 2b' into the deformed square holes 1b, 1b' of the board 1, then thrust counterclockwise in FIG. Rotate plate 2, thrust plate 2
Attach to board 1.

3 and 4 are enlarged views of the support portion 2a and the fixed portion 2b of the thrust plate 2, respectively. In FIG. 3, the support part 2a consists of a base part 5a and a convex part 6a, and the upper surface of the convex part 6a is flat so that the capstan 4 with the flywheel 3 attached is supported by the elasticity of the base part 5a. There is. Further, as shown in FIG. 4, the fixing part 2b consists of a base part 5b and a convex part 6b, and the convex part 6b is provided with a fixing claw 2d. In FIG. 1, when the thrust plate 2 is rotated counterclockwise, the claw 2d climbs over the convex portion 1d of the deformed square hole 1b and falls into the deformed square hole 1b again, so that the thrust plate 2 is attached to the substrate 1. Fixed. Similarly, the claw 2d' provided on the fixing portion 2b' is also fixed to the substrate 1 through the deformed square hole 1b' provided in the substrate 1. Also,
By making the tip of the capstan 4 in contact with the convex portions 6a, 6a' of the support portions 2a and 2a' semispherical to reduce contact resistance, the influence on the drive system is reduced and good results can be obtained.

(Effects of the invention) Since the present invention has the above-mentioned configuration, the fixing work between the substrate and the thrust plate is simple and productivity is excellent.Also, due to the simple configuration, the cost can be reduced. It has the advantage of being easy.

[Brief explanation of the drawing]

1 to 4 are diagrams for explaining one embodiment of the flywheel support device according to the present invention. The figure is a side view to explain the installation of the board and thrust plate.
FIGS. 3 and 4 are enlarged views of the support portion and fixing portion of the thrust plate, respectively. 1... Board, 1a, 1a', 1b, 1b'... Deformed square hole, 2... Thrust plate, 2a, 2a'...
Supporting part, 2b, 2b'... Fixed part, 2d, 2d'...
Claw, 3... flywheel, 4... capstan, 5a, 5b... base, 6a, 6a'... convex portion.

Claims (1)

[Scope of utility model registration request] A hole for a bearing is provided in the center, two holes for a support part are provided at opposing positions centering on the bearing hole, and a protrusion for locking is provided at opposing positions centering on the bearing hole. a substrate provided with two holes for a fixing part having a part, and a shaft in the center that engages with the hole for the bearing, and with the shaft as the center,
Two supporting parts that support the capstan with the flywheel attached are arranged at positions corresponding to the holes for the supporting parts, and two fixing parts having claws for fixing the thrust plate main body to the base plate are arranged in the fixing part. The thrust plate is arranged at a position corresponding to the hole for the part, and the supporting part and the fixing part are integrally configured. After the claw provided on the fixing part moves over the locking convex part provided in the hole for the fixing part by rotating and moves to the fixing position,
A pawl provided on the fixing part is prevented from rotating by the locking convex part, and the thrust plate is fixed to the base plate, and the support part supports the capstan to which the flywheel is attached. flywheel support device.