JPS62275347A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent the disconnection of a wiring wire rod of a sensor when a cassette holder has reciprocating motions by omitting said wiring wire laid between a chassis and a cassette holder. CONSTITUTION:A cassette detecting means consists of a lever 15 to be detected and a sensor 23 which is set at the side of a chassis 1. Thus the wiring wire rod of the sensor 23 so far laid between a cassette holder 2 and the chassis 1 can be omitted unlike a conventional cassette loading device containing the sensor 23 set at the side of the holder 2. thus it is possible to evade such a case where the wiring wire rod of the sensor 23 laid between the holder 2 and the chassis 1 catches other parts of the chassis device and disconnected or worn when the holder 2 has reciprocating motions In such a way, impossibility of detection of the kind of cassette 50 being in a loaded or unloaded state to the holder 2 are prevented due to the disconnection of the wiring wire rod of the sensor 23.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention is a cassette loading device that is most suitable for application to, for example, a front-loading cassette type VTR, and is particularly applicable to a cassette loading device. The present invention relates to a cassette mounting device that serves as a cassette detection means for detecting a cassette inserted into a holder.

[Summary of the invention]

The present invention provides a cassette mounting device that includes a cassette holder that reciprocates between a cassette insertion position and a cassette mounting position, and a cassette detection means that detects a cassette inserted into the cassette holder.・It is composed of a detection lever provided on the throat holder and a sensor provided on the chassis side, and is configured so that the detection lever can escape from the sensor when the cassette holder moves forward, and the chassis and cassette holder By eliminating the need for the sensor wiring wire placed between the two, it is possible to prevent the sensor wiring wire from breaking when the cassette holder reciprocates, and to facilitate device assembly and make the device more compact. It has been made possible to do so.

[Conventional technology]

A conventional cassette mounting device has a chassis that supports a cassette holder, and reciprocates between a cassette insertion position where a cassette is inserted into the chassis and a cassette mounting position where the inserted cassette is mounted on a reel stand. The cassette holder is attached.

The cassette holder is equipped with a sensor for detecting insertion/removal of the cassette into the cassette holder or the type of inserted cassette, and the wiring wire for this sensor is connected from the power supply to the chassis. It is connected to the sensor of the cassette holder via the wire fixing part.

[Problem that the invention seeks to solve]

However, according to the above conventional device, when the cassette holder moves back and forth, the wiring wire placed between the wire fixing part of the chassis and the sensor of the cassette holder gets caught on the chassis or other parts of the device, and the wiring The wire for use is broken,
Another disadvantage is that it is easily abraded. If the sensor wiring is disconnected or worn out, it becomes impossible to insert or remove a cassette into or out of the cassette holder, or to detect the type of cassette inserted into the cassette holder. It becomes impossible to move or stop the VTR, or to drive the drive motor of the VTR, resulting in a fatal defect in the device.

In addition, with conventional devices, it is necessary to first fix the sensor wiring wire to the wire fixing part of the chassis and then connect the wiring wire to the sensor of the cassette holder, which takes time for wiring and makes it difficult to assemble the device. This has the disadvantage of complicating the work.

Furthermore, in the conventional device, it is necessary to secure a space between the chassis and the cassette holder for the movement of the wiring wire of the sensor, and this space has been an obstacle in making the device compact.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cassette mounting device that can eliminate the need for a sensor wiring wire disposed between a chassis and a cassette holder.

[Means for solving problems]

The present invention includes a cassette holder that reciprocates between a cassette insertion position where a cassette is inserted and a cassette mounting position where the inserted cassette is mounted on a reel stand, and a cassette holder that detects a cassette inserted into the cassette holder. A cassette mounting device having a cassette detecting means, the cassette detecting means detects a detected lever having a detected part and rotated by a cassette inserted into the cassette holder, and the detected part. and a sensor, the lever to be detected is provided on the cassette holder, the sensor is provided on a chassis side that supports the cassette holder, and when the cassette is inserted into the cassette holder, the lever to be detected detects the sensor. After activation, when the cassette holder is moved from the cassette insertion position to the cassette mounting position, the detection lever can be released from the sensor.

[Effect]

According to the present invention, the detection lever is rotated by inserting and removing the cassette into the cassette holder, and the sensor is activated. Since this sensor is provided on the chassis side, not on the cassette holder side, it is only necessary to attach the sensor wiring wire to the chassis side, and the sensor wiring wire is placed between the chassis and the cassette holder. There's no need.

Furthermore, after the sensor is activated by rotation of the detection lever, when the cassette holder is moved from the cassette insertion position to the cassette mounting position, the detection lever is configured to escape from the sensor. The detection lever does not get caught on the sensor and prevent the forward movement of the cassette holder.

(Embodiment) An embodiment in which the present invention is applied to a cassette mounting device for a cassette type VTR will be described below with reference to the drawings.

As shown in FIGS. 3A to 4B, a cassette holder 2 is supported on the chassis l. The cassette holder 2 is
It is located directly above the reel stand 51, and the cassette 5
0 is inserted (see FIGS. 3A and 4A) and the cassette mounting position (see FIGS. 3B and 4B) where the cassette 50 is mounted on the reel stand 51 (see FIGS. 3B and 4B).
It is configured to be able to freely reciprocate in the vertical direction).

A side plate 3 is secured to the side portion 2a of the cassette holder with screws 4, as shown in FIG.

A pair of upper and lower cylindrical guide pins 5 is provided on the side plate 3, and the tip of the guide pin 5 is constituted by a roller 6. A ring 7 is attached to the outer periphery of the guide pin 5 from the tip thereof.

The side plate 3 is also provided with a fulcrum pin 8, and a cassette holder driving member 9 is attached to the fulcrum pin 8 through a hole IO so as to be able to swing up and down. A groove 11 extending in the lateral (horizontal) direction is formed in the cassette holder drive member 9, and an end portion 11a of the groove 11 is curved downward to correspond to the rotation locus of an eccentric pin 25, which will be described later. There is. A limiter spring engaging recess 13 that engages with a limiter spring 12 disposed at the lower part of the side plate 3 is provided at the lower part of the cassette holder driving member 9 .

A detection lever 15 is attached to a shaft 14 on the lower front side of the bottom plate 2b of the cassette holder 2 so as to be rotatable in the directions of arrows a and b in FIG. A detected portion 16 bent vertically upward is formed at one end of the detected lever 15, and a pin 1 that abuts against the front surface of the cassette 50 is formed at the other end.
7 are erected. A spring 20 is attached between the spring attachment hole 18 in the middle of the detected lever 15 and the spring attachment part 19 at the bottom of the cassette holder 2, and this spring 20 causes the detected lever 15 to move in the direction of arrow a. is reversely energized.

The cassette holder 2 includes a cassette/gutter pressing roller 41 and a pair of left and right cassette position regulating plates 42 for preventing the cassette 50 inserted into the cassette holder 2 from shaking vertically and horizontally within the cassette holder 2. is installed. The cassette pressing roller 41 is used to prevent the cassette 50 from shaking vertically, and is attached to the top plate 46 of the cassette holder 2 as shown in FIG. 3A.

The cassette position regulating plate 42 is for preventing the cassette 50 from wobbling in the left and right directions, and is arranged on the bottom plate 2b of the cassette holder 2, as shown in FIG.

As shown in FIGS. 3A and 3B, the side plate 22 of the chassis 1 is provided with a pair of upper and lower vertical guide grooves 21 that guide the upper and lower pairs of guide pins 5 of the cassette holder 2, respectively. As the roller 6 of the guide pin 5 vertically moves up and down within the guide groove 21, the cassette holder 2 is reciprocated vertically.

A sensor 23 consisting of an optical sensor is provided on the side plate 22 of the chassis 1 at a position corresponding to the lever 15 to be detected, as shown in FIGS. 1 to 4B.

This sensor 23 detects the detected portion 16 of the detected lever 15, determines whether the cassette 50 is inserted into or removed from the cassette holder 2, and turns the drive motor 44 on or off. The sensor 23 is constructed of a bottom open type sensor, and is configured to allow the detection lever 15 to escape from the bottom of the sensor 23 when the cassette holder 2 moves downward. Note that the wiring wire 3 of the sensor 23
9 is attached to the side plate 22 of the chassis 1.

Below the side plate 22 of the chassis 1, a rotating gear 3O is mounted on the shaft 3.
1, it is mounted rotatably in the directions of arrows c and d in FIG. 3A. The rotating gear 30 is provided with an eccentric pin 25, and the rotating gear 30 and the eccentric pin 25 constitute an eccentric rotating body. The eccentric bin 25 is shown in FIG. 3A,
As shown in FIG. 3B, it is engaged with a groove 11 formed in the cassette holder driving member 9.

A detection plate 32 is attached to the outer edge of the rotating gear 30, and the detection plate 32 is detected by sensors 33a and 33b provided at the upper and lower parts of the chassis 1, respectively, to detect the cassette holder 2. It is designed to detect the vertical position.

The rotating gear 30 is meshed with a spur gear 35 provided coaxially with a worm wheel 36, as shown in FIG. The spur gear 35 rotates as the worm wheel 36 rotates, and the worm wheel 36 is driven by the drive motor 44 via the worm 37.

Next, the operation of the above embodiment will be explained.

As shown in FIG.
When the cassette 50 is inserted into the cassette holder 2 from the position shown by the solid line to the position shown by the dashed line, the front surface of the cassette 50 comes into contact with the pin 17 of the detected lever 15, and the detected lever 15
Rotate in the direction of the arrow from the position shown by the solid line to the position shown by the dashed-dotted line. As the detected lever 15 rotates, the detected portion 16 of the detected lever 15 comes off the sensor 23 as shown by the dashed line, thereby turning on the sensor 23 and driving the drive motor 44.

By driving the drive motor 44, the rotating gear 30 is rotated in the direction of arrow d in FIG. 3A via the worm 37, worm wheel 36, and spur gear 35. Rotating gear 3
0, the eccentric pin 25 of the rotary gear 30 slides within the groove 11 of the cassette holder drive member 9, causing the cassette holder 2 to move forward in the direction of the arrow f in FIG. 3A. At this time, the detected portion 16 of the detected lever 15 is released downward from the open lower part of the sensor 23, so that the detected lever 15 does not catch on the sensor 23 and prevent the forward movement of the cassette holder 2. The guide pin 5 of the cassette holder 2 is guided by the guide groove 21 of the chassis 1, so that the cassette holder 2 is vertically lowered to the cassette mounting position shown in FIG. 3B. When the detection plate 32 of the rotating gear 30 is detected by the sensor 33b, the drive motor 44 is stopped, and the cassette holder 2 is stopped at the cassette mounting position shown in FIGS. 3B and 4B.

At this time, the limiter spring 12 is compressed by the cassette holder drive member 9, and the cassette 50 is moved to the reel stand 5 while being elastically pressed to a cassette height regulating bin (not shown).
1.

Next, when the eject button (not shown) is pressed after the desired recording/reproduction is performed, the drive motor 44 is rotated in the reverse direction.
Rotating gear 30 is rotated in the direction of arrow C in FIG. 3B. As the rotary gear 30 rotates in the direction of the arrow C, the cassette holder 2 is vertically moved back (in the direction of the arrow e) via the eccentric pin 25 and the cassette holder drive member 9 to the cassette insertion position shown in FIG. 3A. When the detected plate 32 of the rotating gear 30 is detected by the sensor 33a, the drive motor 44 is stopped and the cassette holder 2 is stopped at the cassette insertion position. At this time, even if the eccentric pin 25 of the rotary gear 30 rotates excessively in the direction of arrow g from the highest stop position shown by the solid line in FIG. 3A due to overrun of the drive motor 44, the cassette holder drive member 9 The end portion 11a of the groove 11 is curved downward along the rotation locus of the eccentric pin 25 as described above, so that the eccentric pin 2
5 moves along the curved groove 11 and does not act on the cassette holder drive member 9 to move the cassette holder 2 downward. Therefore, it is possible to prevent the cassette holder 2 from being lowered again from the cassette insertion position due to overrun of the drive motor 44, and from becoming unable to remove the cassette 50 from the inside of the cassette holder 2.

Next, when the cassette 50 is removed from the cassette holder 2, the detection lever 15 is moved back in the direction of the arrow a from the position shown by the dashed line in FIG. 1 to the position shown by the solid line by the spring 20. Accordingly, the detected portion 16 also moves back to the position shown by the broken line, and the sensor 23 is turned off.

In addition, when the cassette holder 2 reciprocates as described above, the moving speed of the cassette holder 2 gradually becomes slower as it approaches the cassette insertion position and the cassette mounting position. This is because when the cassette holder 2 approaches the cassette insertion position or the cassette mounting position, the eccentric pin 25 of the rotary gear 30 slides in the groove 11 of the cassette holder drive member 9 in a nearly horizontal state. Therefore, as the cassette holder 2 approaches the cassette mounting position, the descending speed of the cassette holder 2 becomes slower, thereby reducing the impact when mounting the cassette 50 on the reel stand 51, and as the descending speed decreases, the descending torque increases. , attach the cassette 50 to the cassette height regulating pin (not shown) with the limiter spring 1.
2, it can be strongly crimped.

Although not shown, the reel stand 5 of the recording/reproducing device
1 is attached to the base plate and the base plate to which the rotary head drum is attached are separated, and if desired, a cassette loading device for loading the cassette to the reel stand 51 can be used with the device as in the above-mentioned embodiment. Either the rotary head drum or the conventional device can be replaced by simply moving the rotary head drum to a position corresponding to the cassette loading device.

1. In the above-described embodiment, the sensor 23 is composed of an optical sensor, but the sensor 23 may be composed of a microswitch.

Further, in the above embodiment, the detection lever 15 and the sensor 23, which are cassette detection means for detecting insertion and removal of the cassette 50 into and out of the cassette holder, have been described. It may be a cassette detection means that detects the size of the cassette inserted into the holder.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various effective changes can be made based on the technical idea of the present invention.

Further, the present invention is not limited to a cassette mounting device for a cassette type VTR, but can be applied to various cassette mounting devices for various other cassette type recording and reproducing devices, information processing devices, and the like.

〔Effect of the invention〕

According to the present invention, the cassette detection means is constituted by a lever to be detected and a sensor, and the sensor is provided on the chassis side, so unlike the conventional device in which the sensor is provided on the cassette holder side, the sensor wiring wire There is no need to place the cassette holder between the cassette holder and the chassis. Therefore, when the cassette holder moves back and forth, it is possible to prevent the wiring wire of the sensor placed between the cassette holder and the chassis from getting caught in other parts of the chassis device and causing the wiring wire to break or wear out. This prevents insertion and removal of the cassette from the cassette holder or inability to detect the type of inserted cassette due to breakage of the wiring wire of the sensor, etc., and improves the reliability of the device.

Further, according to the present invention, since there is no need to attach a wiring wire between the chassis and the cassette holder, the time required for wiring the sensor can be saved and the assembly work of the device can be facilitated.

Further, unlike conventional devices, there is no need to secure a space for moving the sensor wiring wire between the chassis and the cassette holder, so the device can be made more compact and compact by saving space.

Furthermore, according to the present invention, the lever to be detected is configured to be able to escape from the sensor when the cassette holder moves forward, so that the lever to be detected does not get caught by the sensor and prevent the forward movement of the cassette holder. There isn't.

[Brief explanation of the drawing]

1 to 4B show an embodiment of the present invention, in which FIG. 1 is a plan view of the main part, FIG. 2 is a perspective view of the main part,
FIGS. 3A to 4B are diagrams showing the operation of the cassette holder. In addition, in the symbols used in the drawings, ■−・−−−−1−−−・−・−Chassis 2−・・−・
−・−−−−−・・・−・Cassette holder 15−・−−
−−−−−・・−Detected lever 16−−−−−−
−−−−・−Detected part 23・−・−・−・−・−・
Sensor 50 --- Cassette 51 -- Reel stand.

Claims (1)

[Scope of Claims] A cassette holder that reciprocates between a cassette insertion position where a cassette is inserted and a cassette installation position where the inserted cassette is mounted on a reel stand; A cassette mounting device having a cassette detecting means for detecting the cassette detecting means, the cassette detecting means being connected to a detected lever having a detected part and rotated by a cassette inserted into the cassette holder; and a sensor for detecting, the lever to be detected is provided on the cassette holder, the sensor is provided on a chassis side that supports the cassette holder, and when the cassette is inserted into the cassette holder, the lever to be detected is The cassette mounting is characterized in that the detection lever is configured to be able to escape from the sensor when the cassette holder is moved from the cassette insertion position to the cassette mounting position after activating the sensor. Device.