JPH09167394A - Operating-mode switching device for reproducing/recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately select the operation mode of a recording/reproducing device by matching an operation mode pattern selected by the rotation of the cam gear part brush of an operation mode switching device with an operation mode selected by user. SOLUTION: The cam gear part 220 of an operation mode switching device 210 is rotated by the rotation of a loading cam motor and a brush 224 is electrically connected to the operation mode pattern 244 of an operation mode pattern plate 240. When a user presses an operation mode button, the first signal of the selected operation mode is inputted to a controller, the cam gear part 220 is rotated, the operation mode pattern 224 is selected by the brush 224 and a second signal is outputted from an output part 248 to the controller. The controller compares the first signal with the second, signal, controls a control mode switching device 210 until the signals are matched with each other and thus the operation mode is accurately selected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing / recording device, and more particularly to an operation mode switching device for the reproducing / recording device.

[0002]

2. Description of the Related Art Generally, a reproducing / recording device such as a cassette tape recorder or an optical disk player includes a loading cam motor, an operation mode switching device, a control device (for example, a microcomputer), and a capstan motor. The operation modes are tape playback (Play Mode) and tape rewinding (fas).
t rewind) and the like. When the user presses the operation mode button installed on the cassette tape recorder, the first signal according to the selected operation mode is input to the controller. The operation mode switching device sequentially selects the operation mode by rotating the loading cam motor. The second signal according to the operating mode selected by the operating mode switching device is input to the control device.

When the user presses the operating mode button to select the operating mode, the controller compares the first signal and the second signal. If the comparison result shows that the first signal and the second signal are the same, the operating mode of the operating mode switching device is the operating mode selected by the user, so that the control device maintains the current operation of the capstan motor. Let If the first signal and the second signal are different, the control device rotates the loading cam motor in the forward or reverse direction.
The operating mode switching device selects the third operating mode by rotating the loading cam motor in the forward or reverse direction. The operating mode switching device outputs a third signal according to the third operating mode to the control device. Eventually, the controller controls the loading cam motor until the operating mode switching device selects the operating mode selected by the user. When the operating mode switching device selects the operating mode selected by the user, the controller controls the capstan motor to operate the cassette tape recorder in the operating mode selected by the user.

FIG. 1 is an exploded perspective view of a conventional operation mode switching device for a reproducing / recording device. As shown in FIG. 1, the conventional operation mode switching device 200 includes a cam gear unit 80, an operation mode selection plate 90, and an operation mode pattern plate 50. The cam gear 84 of the cam gear portion 80 meshes with a worm wheel (not shown) of the loading cam motor. The cam gear unit 80 rotates according to the rotation of the loading cam motor.

The cam gear portion 80 has a central shaft 82 and two pins 81. The operation mode selection plate 90 rotates according to the rotation of the cam gear portion 80. The operation mode selection plate 90 has a disc shape. The operation mode selection plate 90 has a first opening 96, two pin receiving protrusions 91, a brush 94 and a number of first hooks 92. The first opening 96 is formed at the center of the operation mode selection plate 90. The two pin receiving projections 91 are formed on the lower surface of the operation mode selection plate 90. Each of the two pin receiving protrusions 91 has a pin receiving groove.

The brush 94 is fixed to the upper surface of the operation mode selection plate 90. The brush 94 is formed in a fork shape and has a large number of branches. Here, three branches are shown. The plurality of first hooks 92 are formed on the upper surface of the operation mode selection plate 90. The large number of first hooks 92 are separated from each other along the circumference of the first opening 96 at predetermined intervals. Shaft 8 of cam gear unit 80
2 is inserted into the first opening 96. 2 of cam gear part 80
The individual pins are accommodated in correspondence with the two pin receiving projections 91. Therefore, the operation mode selection plate 90 also rotates simultaneously with the rotation of the cam gear portion 80. The operation mode selection plate 90 is combined with the operation mode pattern plate 50. The operation mode pattern plate 50 is formed in a disc shape. Operation mode pattern 51
Is the second opening 54, a large number of switching pattern plates 5
It has 0 and many second hooks 52. Second opening 5
4 is formed at the center of the operation mode pattern plate 50.

The plurality of operating mode patterns 51 are conductors and are formed on the lower surface of the operating mode pattern plate 50 along each of the plurality of operating mode pattern paths. The plurality of operation mode patterns 51 are formed parallel to the circumference of the operation mode pattern plate 50. That is, the plurality of operation mode patterns 51 are concentric with the second opening. Here, three operation mode patterns are shown. Therefore, the three concentric circles are the operation mode pattern plates 50.
Formed on top. As shown in FIG. 1, the operation mode pattern 51 is formed differently for each concentric circle. The plurality of second hooks 52 are formed at predetermined intervals along the circumference of the operation mode pattern plate 50. FIG. 1 shows three second hooks.

Reference numeral 60 is a bracket. Generally, the bracket is made of resin. The bracket 60 is fixed to a deck mechanism of a cassette tape recorder, for example. The bracket 60 has a large number of hook coupling holes 61. The multiple second hooks 52 are inserted into the multiple hook coupling holes 61. Therefore, the operation mode pattern plate 50 is fixed to the bracket 60.

In the conventional operation mode switching device 200 as described above, the cam gear portion 80 is connected to the operation mode selection plate 90 by inserting the pin 81 into the pin receiving projection 91. Outer diameter of pin 81 and pin receiving projection 91
There is a difference from the diameter of the receiving groove of. Since the diameters are different as described above, the rotation angle of the cam gear portion 80 and the rotation angle of the operation mode selection plate 90 may be different. In addition, as the difference in the rotation angle accumulates, the difference in the rotation angle becomes more severe. Therefore, the selection of the operation mode becomes unstable.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an operating mode switching device capable of accurately selecting the operating mode of a reproducing / recording device.

[0011]

To achieve the above object, the operating mode switching device according to the present invention includes a cam gear portion and an operating mode selecting plate. The cam gear part is rotated by the rotation of the driving means to select an operation mode, is rotatably mounted by the main chassis, has a central axis formed at the center of the upper surface, and has a large number of branches and a large number of branches on one side of the upper surface. A fork-shaped brush having a body connecting the branches of the.

The operation mode selection plate has an opening for inserting the central shaft in the center, and an operation mode signal output section for outputting a signal for the selected operation mode on one side. Has a plurality of operation mode pattern paths in which a plurality of operation mode patterns are formed, and has a plurality of hooks on the upper surface for connecting with brackets. The plurality of operating mode pattern paths form a concentric circle with respect to the opening, the plurality of operating mode pattern paths are electrically insulated from each other, and the plurality of branches of the brush move along the respective plurality of operating mode pattern paths. While selecting the operation mode pattern.

The cam gear portion is formed in a disk shape, and the cam gear is formed on the outer peripheral surface thereof. The cam gear portion has a brush support portion for supporting and fixing the brush.
The center axis of the cam gear part consists of a rotating shaft and a support boss with a post receiving groove formed in the center, the rotating shaft is inserted into the opening, and the post formed in the main chassis is inserted into the post receiving groove. To be done.

Therefore, when the user presses the operation mode button installed on the reproducing / recording device such as a cassette tape recorder, the first signal according to the selected operation mode is input to the control device. The cam gear portion of the operation mode switching device is rotated by the rotation of the loading cam motor. The rotation of the cam gear causes the multiple branches of the brush to rotate along multiple operational mode pattern paths. The rotation of the brush selects the operating mode pattern formed in each of the multiple operating mode pattern paths. The selected operation mode patterns are electrically connected by the brush to form one operation mode. When one operating mode is configured, a second signal for that operating mode is output from the operating mode signal output to the controller. The controller compares the first signal and the second signal. If the result of the comparison is that the first signal and the second signal are the same, the operating mode of the operating mode switching device is the operating mode selected by the user, so that the controller keeps the current operation of the capstan motor. .

If the first signal and the second signal are different, the control device rotates the loading cam motor forward or reverse. The operation mode switching device selects the third operation mode by the forward or reverse rotation of the loading cam motor. The operating mode switching device outputs a third signal according to the third operating mode to the control device. Eventually, the controller controls the loading cam motor until the operating mode switching device selects the operating mode selected by the user. When the operating mode switching device selects the operating mode selected by the user, the controller controls the capstan motor to operate the reproducing / recording device to the operating mode selected by the user.

With the operating mode switching device according to the present invention, when the operating mode is selected, the cam gear portion and the brush rotate simultaneously, so that an accurate selection of the operating mode is achieved.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view of the operation mode switching device of the reproducing / recording device according to the first embodiment of the present invention, and FIG. 3 is a sectional view of the operation mode switching device shown in FIG. As shown in FIGS. 2 and 3, the first aspect of the present invention is as follows.
The operation mode switching device 210 according to the embodiment includes a cam gear unit 220 and an operation mode pattern plate 240.

The cam gear portion 220 meshes with a worm wheel (not shown) of the loading cam motor. The cam gear 220 is rotated by the rotation of the loading cam motor. The cam gear 220 includes a central shaft 222 and a brush 22.
4, a brush support 226, and a cam gear 228. The central shaft 222 has a rotating shaft 230 and a support boss 232. The central shaft 222 is a protrusion formed in the central portion of the cam gear portion 220. The rotating shaft 230 is formed at the upper end of the central shaft 222, and the support boss 232 is formed between the upper surface of the cam gear 220 and the lower end of the rotating shaft 230. Support boss 2
32 has a post receiving groove (not shown) in the center thereof. The post receiving groove is formed on the lower surface of the cam gear portion 220. In addition, the brush support 2 is provided on the upper surface of the cam gear 220.
26 are formed.

The brush 224 is fixed to the upper surface of the brush support 226. The brush 224 is formed in a fork shape,
It has a number of branches and a body connecting the plurality of branches. Here, three branches (224a, 224b, and 224c) are shown.

The cam gear 228 is formed along the outer peripheral surface of the cam gear portion 220. The cam gear 228 meshes with the worm wheel of the loading cam motor.

The operation mode pattern plate 240 has a disc shape. The operation mode pattern plate 240 is the third opening 2
42, multiple operating mode pattern paths, multiple third hooks 246, and operating boss signal output 248. Third
The opening 242 is formed at the center of the operation mode pattern plate 240. Multiple operation mode patterns are formed along one operation mode pattern path. The plurality of operation mode patterns are conductors and are formed on the lower surface of the operation mode pattern plate 240. Each of the plurality of operation mode pattern paths is formed parallel to the circumference of the operation mode pattern plate 240. That is, each of the plurality of operation mode pattern paths has a concentric relationship with the third opening.

The plurality of operating mode pattern paths are electrically isolated from each other. Here, three operating mode pattern paths are shown. Therefore, three concentric circles are formed on the operation mode pattern plate 240. As shown in FIG. 2, a large number of operation mode patterns 244 are formed differently for each concentric circle.
The multiple branches of brush 224 correspond to multiple operating mode pattern paths, respectively. As such, multiple operating mode pattern paths may be electrically coupled by multiple branches of brush 224. The plurality of third hooks 246 are formed at predetermined intervals along the circumference of the operation mode pattern plate 240. FIG. 3 shows three third hooks.

Reference numeral 248 denotes an operation mode signal output section. The operation mode signal output unit 248 has a number of operation mode signal output terminals 250. Multiple operation mode signal output terminals 2
Each of the 50 outputs an operating mode signal according to a number of operating mode patterns selected by the brush 224.

The output operation mode signal is input to the control device. The controller compares the operating mode entered by the user with the operating mode selected by the brush 244. The controller repeats the process described in the above-mentioned prior art to operate the recording / reproducing device in the operation mode selected by the user.

The operating mode pattern plate 240 is coupled to the bracket 260.

Generally, the bracket is made of a resin material. The bracket 260 has a number of hook coupling holes 262.
The plurality of third hooks 246 are inserted corresponding to the plurality of hook coupling holes 262. Therefore, the operation mode pattern plate 2
40 is fixed to the bracket 260.

Reference numeral 280 indicates a main chassis. The main chassis 280 is also called a deck. Main chassis 2
A post 282 is installed at 80. The post 282 projects toward the cam gear portion 220. The post 282 is inserted into the post receiving groove of the support boss 232. Post 28
By inserting 2 into the post receiving groove and inserting the rotary shaft 230 into the third opening, the cam gear 220 is fixed so as to be in a predetermined position with respect to the operation mode pattern plate 240.

FIG. 4 is an exploded perspective view of an operation mode switching device of a reproducing / recording device according to a second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals.

As shown in FIG. 4, the operation mode switching device 40 of the recording / reproducing apparatus according to the second embodiment of the present invention.
Reference numeral 0 includes a bracket 410 and a cam gear portion 220.

The bracket 410 has a number of operating mode patterns 412 and rotary bearing grooves 414. The plurality of operation mode patterns 412 are formed of a plurality of concentric circles having different radii with respect to the rotary bearing groove 414. The plurality of operating mode patterns 412, similar to the first embodiment, consist of conductors along the plurality of operating mode pattern paths. Bracket 4
A large number of output terminals 416 protrude from one side of 10. The rotary shaft 230 of the cam gear 220 is inserted into the rotary bearing groove 414 of the bracket 410. Similar to the first embodiment, a post receiving groove (not shown) is formed at the center of the support boss 232. The post 420 is installed on the main chassis 280. The post 420 is a protrusion that faces the cam gear 220. The post 420 is inserted into the post receiving groove of the support boss 232.

By inserting the post 420 into the cam gear portion 220 and inserting the rotary shaft 230 into the rotary bearing groove 414, the cam gear portion 220 is rotatably fixed to the bracket 410 at a predetermined position. Less than,
The relationship between the brush 224 and the operation mode pattern 412 is the same as above.

The operation of the operation mode switching device of the reproducing / recording device according to the embodiment of the present invention will be described below.

When the user presses the operation mode button installed on the reproducing / recording device such as a cassette tape recorder, the first signal according to the selected operation mode is input to the control device. The cam gear portion 220 of the operation mode switching device is rotated by the rotation of the loading cam motor. The rotation of the cam gear 220 causes the multiple branches of the brush 224 to rotate along multiple operational mode pattern paths. The rotation of the brush 224 selects the operating mode pattern formed in each of the multiple operating mode pattern paths. The selected operation mode pattern is the brush 22.
It is electrically connected by 4 and constitutes one operating mode.

When one operating mode is configured, the second signal for that operating mode is the operating mode signal output 24.
8 to the control device. The controller compares the first signal and the second signal. As a result, if the first signal and the second signal are the same, the operating mode of the operating mode switching device is the operating mode selected by the user, so that the controller keeps the current operation of the capstan motor. If the first signal and the second signal are different, the controller rotates the loading cam motor in the forward or reverse direction. The operation mode switching device selects the third operation mode by the forward or reverse rotation of the loading cam motor.

The operating mode switching device outputs a third signal according to the third operating mode to the control device. Eventually, the controller controls the loading cam motor until the operating mode switching device selects the operating mode selected by the user. When the operating mode switching device selects the operating mode selected by the user, the controller controls the capstan motor to operate the reproducing / recording device to the operating mode selected by the user.

As described above, when the operation mode is selected by the operation mode switching device according to the present invention, the cam gear portion and the brush rotate simultaneously, so that an accurate selection of the operation mode is achieved.

The present invention has been described above based on the specific embodiments, but the present invention is not limited to this, and modifications and improvements can be made within the scope of ordinary knowledge of those skilled in the art. Of course there are.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a conventional operation mode switching device for a reproducing / recording device.

FIG. 2 is an exploded perspective view of an operation mode switching device of a reproducing / recording device according to a first exemplary embodiment of the present invention.

3 is a cross-sectional view of the operation mode switching device shown in FIG.

FIG. 4 is an exploded perspective view of an operation mode switching device of a recording / reproducing device according to a second embodiment of the present invention.

[Explanation of symbols]

 220 cam gear part 224 brush 240 operation mode pattern plate 244 many operation mode patterns 260 bracket 280 main chassis

Claims (3)

[Claims] 1. An operation mode switching device for a reproducing / recording device, which is rotated by drive means controlled by a control device, is mounted between a bracket and a main chassis, and selects an operation mode such as play or rewind. , An operating mode is selected by rotating by the rotation of the driving means, is rotatably fixed by the main chassis, a central axis is formed in the center of the upper surface, and a large number of branches are formed on one side of the upper surface. A cam gear portion provided with a fork-shaped brush having a body connecting the plurality of branches; and an opening for inserting the central shaft in the central portion, and the selected operation mode on one side And an operation mode signal output section for outputting a signal for the operation mode, and a plurality of operation mode pattern paths on which a plurality of operation mode patterns are formed on the lower surface. , A plurality of hooks connected to the bracket on the upper surface, the plurality of operating mode pattern paths are concentric with the opening, and the plurality of operating mode pattern paths are electrically insulated from each other. , A plurality of branches of the brush, each of which comprises an operation mode pattern plate for forming an operation mode pattern while moving along the plurality of operation mode pattern paths;
Operating mode switching device for recording devices. 2. The operation mode switching device according to claim 1, wherein the cam gear portion has a brush support portion for supporting and fixing the brush. 3. The center axis of the cam gear portion comprises a rotating shaft and a support boss having a post receiving groove formed in the center portion,
2. The operation mode switching device for a reproducing / recording device according to claim 1, wherein the rotary shaft is inserted into the opening, and the post formed in the main chassis is inserted into the post receiving groove.