KR100198616B1 - Mode switch in vcr - Google Patents

Abstract

The present invention relates to a mode switch of V-CAL. More specifically, the position of each mode is sensed by detecting the rotation angle of a cam gear which provides the driving force of various brake devices while simultaneously loading the tape and the tape cassette. The mode switch of the V-Cal, which is fixed to the bracket 52 supported by the main base 1, interlocked with the cam gear 60, detects the set mode and outputs a detection signal to the main control part. In the configuration, the terminal 212 is provided with a connector pin 212a on one side and the main body 211 is integrally configured, one end is connected to the connector pin 212a and the other end is fixed to one surface of the main body 211 A fixed body 210 having a sensing terminal 213 and a connection terminal 215 fixed to the main body 211 and having elasticity maintaining a predetermined gap with the sensing terminal 213; A mode setting gear 221 meshing with the cam gear is formed on one surface, and rotatably coupled to the main body 211 on the other side, and presses the connecting terminal at a predetermined position to press the connecting terminal 215 and the sensing terminal 213. It is characterized by a mode switch of V-C made of a rotating body 220 having a pressing projection 222 to be connected.

Description

V's Mode Switch

1 is a plan view showing the configuration of the driving mechanism of a general V-al.

2 is an exploded perspective view showing the configuration of a conventional V mode switch.

Figure 3 is a perspective view showing the configuration of the BC mode switch according to the present invention.

Figure 4 (a) and (b) is a partial cross-sectional view showing an operating state of the mode switch according to the present invention.

* Explanation of symbols for main parts of the drawings

1: main base 52: bracket

210: fixed body 211: main body

212 terminal 212a connector pin

213: detection terminal 214: connection plate

215: connection terminal 220: rotating body

221: mode setting gear 222: pressing projection

The present invention relates to a mode switch of V-Cal, and more particularly, to detect the position of each mode by detecting the rotation angle of the cam gear providing the driving force of various brake devices at the same time loading the tape and tape cassette. It is related to the mode switch of V-Cal.

In general, V-RA is a device for recording an image signal on a magnetic recording tape or reproducing a recorded signal. Referring to the schematic diagram of the present invention, as shown in FIG. There is provided a traveling system for moving along, a supply reel 10 and a winding reel 20 for supporting the tape cassette and driving the tape in a selected direction. At the periphery of the supply reel 10 and the take-up reel 20, a brake device for restricting the rotation of the supply reel 10 or the take-up reel 20 is provided if necessary.

The traveling system is provided with a head drum assembly 30 which includes a head which rotates in contact with the tape from the tape cassette and records a signal on the tape or reproduces the recorded signal. In addition, the traveling system is provided with a voice reproducing head 32 for reproducing a voice signal, and is provided with a capstan shaft 42 which rotates by the capstan motor 40 and cooperates with the pinch roller 36 to drive the tape. In addition, there is provided a supply side pole base 14 and a winding side pole base 24 each having a guide roller and an inclined pole to form a tape loading and moving along the guide groove 2 formed on the main base 1. .

And a reel driving device for driving any one of the reel selected from the supply reel 10 or the winding reel 20 is received from the capstan motor 40 between the supply reel 10 and the take-up reel (20) It is installed.

On the main base 1 is provided a cam gear 60 that is rotated by the loading motor 50. On the upper surface of the cam gear 60, the other side of the pinch lever 34 to which the pinch roller 36 is fixed is coupled to one side to form an upper cam 62 for driving the pinch lever 34, and the cam gear 60 The lower surface is formed with a cam groove 64 to interlock with the relay plate 70 for transmitting power to the relay gear (80).

The relay plate 70 and the relay gear 80 are engaged with each other in a rack and pinion form, and the relay gear 80 converts the brake unit and the pole bases 14 and 24 into a set mode 90. ) Is combined with rack and pinion to make a straight reciprocating motion.

In addition, a mode driving gear 66 is integrally formed at the upper end of the cam gear 60, and a mode switch 100 having a mode setting gear 122 meshing with the mode driving gear 66 is installed at one side thereof. It is.

The present invention relates to a mode switch for outputting a control signal at a specific position by engaging the cam gear 60 and sensing the rotation angle of the cam gear as described above. The configuration of the switch is shown.

According to FIG. 2, the conventional mode switch 100 is fixed to a bracket 52 supporting the loading motor 50, and has a disc shape having a plurality of guide grooves 112 concentrically arranged on a surface thereof. The fixture 110 is provided. The stationary body 110 is configured in a disk shape and has a terminal 212 having a plurality of connector pins 212a connected to the printed circuit board 102 on one side.

Rotating body 120 is rotatably coupled to the fixed body 110 and has a plurality of ground pieces 124 elastically inserted into the respective guide grooves 112. As described above, the rotating body 220 is integrally configured with a mode setting gear 122 engaged with the mode driving gear 66 integrally provided with the cam gear 60. On each of the guide grooves 122, sensing terminals 114 (hatched portions on the drawing) are arranged to contact the corresponding ground pieces at different phases and output a control signal.

Thus, the rotating body 120 meshed with the cam gear 60 has a rotational displacement proportional to the rotation of the cam gear, and the rotation is performed. In this case, the sensing terminal provided in each guide groove 112 in the control unit ( The combination of the 124 and the ground pieces 124 detects the corresponding mode at a position corresponding to the specific mode and outputs a detection signal to the main control unit (not shown).

However, such conventional V-Cal has a relatively large manufacturing cost when changing the position of the mode according to the design change or the rotation angle suitable for the mode, and it is necessary to replace the fixture 110, which is cumbersome to replace, as well as the grounding piece 124. ) And chattering occurs due to frictional wear between the sensing terminal 114.

That is, in the conventional mode switch, the means for setting the specific mode is related to the position of the sensing terminal 114 arranged in the guide groove 112, so that when the position of the corresponding mode is changed, the sensing terminal in the guide groove 112 ( 114, the position of the sensing terminal 114 is an insert-molded member with respect to the fixture 110, and therefore, if the angle corresponding to the order or mode of the mode is changed, it is more expensive than the rotor. Since the entire stagnation 110 needs to be replaced, it was acting as an increase factor in manufacturing cost.

In particular, the ground piece 124 is always maintained in contact with the guide groove 112, and in such a state to rotate in the guide groove 112 by the rotation of the rotating body, any one of the detection terminal 124 and Since the ground piece 124 and the fixture 110 are in contact with friction at all times, wear occurs, and thus chattering occurs, and thus, foreign matters generated by wear are detected on the sensing terminal and the ground. It was a situation that a problem of contact failure, that is, a detection error occurs due to disturbing contact with the piece.

Accordingly, the present invention has been made in view of the above-mentioned problems, and its object is to replace relatively inexpensive rotors when changing the mode order or the angle corresponding to the mode, and at the same time, chattering and detection errors due to wear are not introduced. It is to provide a mode switch of V-CAL which can prevent it.

The object of the present invention is to be fixed to the bracket that is supported for the main base, in conjunction with the cam gear to configure the mode switch for detecting the set mode and outputting the detection signal to the main control portion, the terminal pin is provided on one side The body is composed of a single body, one end is connected to the connector pin, the other end is fixed to one side of the main body, and the fixed terminal is fixed to the main body and the connection terminal retaining elasticity to maintain a predetermined gap Congestion; A mode switch is formed on one side of the mode setting gear meshing with the cam gear, the other side is rotatably coupled to the main body, the mode switch consisting of a rotating body having a pressing projection for connecting the connection terminal and the sensing terminal by pressing the connection terminal at a predetermined position Can be achieved by

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. (The same configuration as the conventional one is omitted in the detailed description and the same reference numerals.)

Figure 2 shows the configuration of a preferred embodiment of the mode switch of the V-Cal according to the present invention, according to the present invention is provided with a fixed body 210 is fixed to the bracket 52 for supporting the loading motor 50 do. In addition, the rotating body 220 is rotatably coupled to the fixed body 210 and the mode setting gear 221 is meshed with the mode driving gear 66 integrally provided in the cam gear 60 is provided with have.

The fixed body 210 is integrally formed with a terminal 212 having a plurality of connector pins 212a connected to the printed circuit board 102 on one side of the main body 211 having a disc shape.

A plurality of sensing terminals 213 electrically connected to the respective connector pins 212a are installed in the main body 211, and ends of the sensing terminals 213 are concentric with the center of the main body 211. It is arranged one at an arbitrary position on the plurality of virtual circles having different sizes.

The main body 211 is electrically connected to each other and provided with the same number of connection terminals 215 as the number of sensing terminals 213. Each connecting terminal 215 extends from the connecting plate 214 in different lengths or directions and is fixed to the main body 211 by fixing the connecting plate 214 to the main body 211. Each connection terminal 215 is arranged such that its ends correspond one-to-one on the same vertical line as the ends of the respective sensing terminals 213.

Each of the connection terminals 215 has elasticity that is always separated from the sensing terminal 243 by a predetermined gap, and an interference portion 215a bent to protrude in a curved shape is formed at the front end thereof.

On the other hand, the rotating body 220 is rotatably coupled to the fixed body 210, a plurality of pressing projections 222 is formed on a surface corresponding to the fixed body 210. The pressing protrusion 222 is integrally formed at the time of forming the rotating body 220, and one or two or more pressing protrusions 222 are installed at arbitrary positions on the imaginary circles in which the sensing terminals 213 are arranged. The pressing protrusion 222 may interfere with the front end of the connecting terminal 215 when the rotating body 220 rotates, and may press the connecting terminal 215 to contact the sensing terminal 213 when the rotating body 220 rotates. It must have a sufficient height of protrusion.

Each pressing projection 222 should be arranged so that each connection terminal 215 and the detection terminal 213 can be contacted at different phase angles, which is to change the position according to the mode order or mode execution angle in the manufacturing of the rotating body Could be.

According to the present invention having the configuration as described above, when the cam gear 60 is driven, the rotating body 220 engaged with the cam gear 60 has a rotation displacement proportional to the rotation of the cam gear. In this case, as shown in FIG. 4A, when the connection terminal 215 is in a free state, the connection terminal 215 maintains a predetermined gap with the corresponding sensing terminal 213 by its elastic force. As the rotation of the apparatus proceeds, as shown in (b) of FIG. 4, the pressing protrusion 222 interferes with the interference part 215a of the connecting terminal 215 to press the connecting terminal 215 downward to achieve rotation. do. Therefore, since the connection terminal 215 is electrically energized with the corresponding detection terminal 213, it outputs a control signal of a specific mode corresponding thereto to the main controller (not shown).

According to the present invention, when the mode order or the set angle of the corresponding mode is changed, it is possible to cope with the change through the exchange of the rotating body 220. That is, it is possible to cope with the change by changing the position of the pressurizing protrusion integrally formed with the rotating body so as to coincide with the change value (meaning the modification of the mold). In addition, since each of the pressing protrusion 222, the connection terminal 215 and the sensing terminal 213 is in contact only at a predetermined position it is possible to avoid the continuous contact friction so that no friction wear occurs.

As described above, the VRC according to the present invention has a fixed body having a fixed terminal having a sensing terminal and a connecting terminal retaining elasticity to have a predetermined gap with respect to the sensing terminal, and rotating with respect to the fixed body, respectively. It is relatively inexpensive and easy to replace when changing the mode order or changing the mode setting angle by pressing the connection terminal 215 at a predetermined position so that the corresponding connection terminal and the detection terminal 213 can be electrically energized. It is possible to cope by exchanging the pressure, which can reduce the manufacturing cost. In particular, the connection terminal and the sensing terminal can be contacted by the pressing protrusion, thereby reducing frictional wear and preventing chattering, as well as good mode sensing performance. It is to have an effect that can be maintained.

Claims (4)

It is fixed to the bracket 52 supported by the main base (1), in conjunction with the cam gear 60 to configure the mode switch for detecting the set mode and output the detection signal to the main control portion, the connector pin ( A main body 211 having a terminal 212 provided with 212a integrally formed thereon, one end of which is connected to the connector pin 212a, and the other end of the sensing terminal 213 fixed to one surface of the main body 211, and the main body ( A fixed body 210 fixed to 211 and having a connection terminal 215 having elasticity for maintaining a predetermined gap with the sensing terminal 213; A mode setting gear 221 is formed on one surface and interlocks with the cam gear. The mode setting gear 221 is rotatably coupled to the main body 211 on the other side. V-mode mode switch consisting of a rotating body 220 having a pressing projection 222 to connect. The mode switch of the VR is characterized in that the connection terminal 215 and the sensing terminal 213 are installed on a plurality of virtual circles having a different size and concentric with the rotation center of the fixing agent. . 3. The mode switch of the VSR according to claim 2, wherein each of the sensing terminals 213 is electrically connected to each other by a connection plate 214 fixed to the main body 211. [5] The V-CAL according to any one of claims 1 to 3, wherein the sensing terminal 213 is curved at an upper end to form an interference part 215a that interferes with the pressing protrusion 222. Mode switch.