JPH01116953A - Front loading device - Google Patents

Abstract

PURPOSE:To make the device main body thinner by providing the turning fulcrum of a cassette door on the upper part of a front face cabinet, making the engaging part of a cassette door opening and closing lever and cassette door a face only and thinning the thickness of the cassette door. CONSTITUTION:The turning fulcrum 15 of a cassette door 4 is fitted to the upper end of a front cabinet 6 and to the pin 18 implanted on one end of the front cabinet 6 side of a cassette door opening and closing lever 17, the face of the inside of the cassette door 14 is abutted by being pressed by the energizing force of a 1st spring 21. A 2nd spring 22 is also fixed to the other end of the lever 17 and this end part of the lever 17 is made abuttable by fitting to the driving boss 19 implanted on an arm gear 9. As a result, the distance from the turning fulcrum 15 up to the surface of the front cabinet 6 becomes shorter, the thickness of the cassette door 14 is thinned and the storage space to the upper face cabinet 20 side can be reduced by opening the cassette door 14 due to the door opening and closing lever 17 being of the structure pressing the inner face of the cassette door 14. The thinning of the device main body can thus be realized.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a front loading device for loading a cassette tape provided in, for example, a video tape recorder (hereinafter referred to as VTR) into the main body of the device. In particular, the present invention relates to an operating mechanism of a cassette door that opens and closes a cassette insertion slot.

(Prior Art) Conventionally, a front loading device provided in a VTR has a groove structure as shown in FIG.

In the figure, a pair of left and right cassette holder brackets 2 are fixed on the deck body 1, and each of these cassette holder brackets 2 is formed with two letter-shaped guide grooves 2b at symmetrical positions. . Cassette holder 3
These guide grooves 2a are moved through two pairs of rollers 4 provided on both sides.

Move along 2b. A cassette tape 8 is inserted into this cassette holder 3 from a cassette insertion lower formed in the front cabinet 6 of the device main body 5, and the cassette tape 8 is attached and held in the cassette holder 3, and the cassette tape 8 is attached to the cassette holder 3 and is attached to the deck main body 1. It is designed to be attached to a reel stand device.

An arm gear 9, a relay gear 10, and a drive gear 11 are rotatably provided symmetrically on both sides of the cassette holder bracket 2, respectively, and the rotational force from a drive source (not shown) is transmitted through gears ii and io. The signal is transmitted to the arm gear 9. An arm 12 is fixed to the arm gear 9 so as to protrude in the radial direction, and two pairs of rollers 4 provided on both sides of the cassette holder 3 are inserted into a guide groove 12a formed in the radial direction of the arm 12. one of them
The pairs are engaged. Then, the cassette holder 3 is moved by the rotation of the arm gear 9. Further, an arm gear spring 13 is attached to the arm gear 9, and biases the arm gear 9 in the counterclockwise direction in the figure to prevent the cassette tape 8.
A preload is applied to generate a mounting force when the reel is mounted on the reel stand device. Also, the left and right 1
The pair of drive gears 11 are fixed coaxially and rotate synchronously to synchronize the left and right movements of the cassette holder 3.

A pivot point 15 of the cassette door 14 for opening and closing the cassette insertion lower is provided at the upper front side of the cassette holder bracket 2.
It is biased in the closing direction by a cassette door spring 16 provided at cassette door 5. Further, a cassette door opening/closing lever 11 is rotatably attached to both sides of the cassette holder bracket 2, and a pin 18 is implanted at one end of this opening/closing lever 17. It can be engaged with the front surface. On the other hand, the other end of the opening/closing lever 17 can engage with a drive boss 19 implanted in the arm gear 9.

The opening/closing operation of the conventional cassette door 14 configured as described above will be described below. When the cassette tape 8 is inserted into the cassette insertion lower formed in the front cabinet 6, the cassette door 14 is pushed inward against the urging force of the cassette door spring 16 and opened. At this time, the cassette door opening/closing lever 17 does not move except that the pin 18 separates from the front surface of the cassette door 14. When the cassette tape 8 is held by the cassette holder 3 and moves together with the cassette holder 3, and the cassette tape 8 is disengaged from the cassette door 14, the cassette door 14 is rotated by the biasing force of the cassette door spring 16. Then close the cassette insertion lower again. When ejecting the cassette tape 8, before the cassette tape 8 reaches the position of the cassette door 14, the rotation of the arm gear 9 causes the drive boss 19 installed in the arm gear 9 to move to the cassette door opening/closing lever 17.
Press one end of this opening/closing lever 1 as shown in Figure 5.
7 in the counterclockwise direction in the figure. As a result, the pin 18 implanted at one end of the front side of the opening/closing lever 17 pushes up the cassette door 14, and rotates the cassette door 14 counterclockwise against the biasing force of the cassette door spring 16, thereby opening the cassette door. Open the insertion lower. In this way, the cassette tape 8 can be discharged to the outside from the cassette insertion lower.

However, according to the conventional 70-meter loading device configured as described above, since the pivot point 15 of the cassette door 14 is provided on the cassette holder bracket 2, the distance from this pivot point 15 to the surface of the front cabinet 6 is distance becomes longer. As a result, in order to make the surfaces of the cassette door 14 and the front cabinet 6 flush, the thickness of the cassette door 14 becomes thicker.

Therefore, when the cassette door 14 is opened and brought into contact with the upper cabinet 20 of the apparatus main body 5, the storage space must be increased. Furthermore, since the cassette door 14 is pulled from the outside inward by a pin 18 installed in the cassette door opening/closing lever 17, the cassette door 14 requires a wall to support this pin 18, and at least this wall It becomes thicker by the thickness of 1. The storage space needs to be even larger.

This poses a problem in that it becomes a hindrance to making the device main body 5 thinner. .

Further, according to the conventional example, the cassette door 14 is only urged in the direction of closing the cassette insertion lower by the cassette door spring 16, and can be opened freely by pushing. For this reason, if an infant or the like presses the eject button with his or her hand in the cassette insertion lower, there is a possibility that the cassette ejection operation may cause their fingers to be caught. In order to solve this problem, a groove is formed on the side of the cassette door 14 as shown in FIG.
48, a pin 18 implanted at the tip of the cassette door opening/closing lever 17 may be engaged with this groove 14a, and the rotation of the cassette door 14 may be locked by the opening/closing lever 17. However, according to this structure, when the pivot point is provided on the front cabinet 6 in order to reduce the thickness of the cassette door 14, the cassette door opening/closing lever 17 supported on the cassette holder bracket 2 and the front cabinet 6 are supported. Since the respective support parts for the cassette door 14 are separate members, there is a problem in that it becomes difficult to engage the pin 18 and the groove 14a when attaching or detaching the front cabinet 6.

(Problems to be Solved by the Invention) The present invention uses the cassette door opening/closing lever, which was a particular problem in conventional front loading devices, to pull the cassette door from the outside to the inside to open the cassette insertion slot. To solve the problem of a thick door and an increased height of the device body, and to provide a thin front loading device with good assembly workability.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for inserting and ejecting a cassette tape into a cassette insertion slot formed on the front surface of a magnetic recording and reproducing device. Opening the cassette door in a front loading device comprising a cassette door that is openable and closable, a cassette holder that supports the inserted cassette tape, and an arm gear that moves the cassette holder via an arm. a first biasing means for biasing in the direction; one end abutting the inner surface of the cassette door and the other end engaging an engaging portion provided on the arm gear, and rotatably supported by the device main body. A device comprising a cassette door opening/closing lever and a second urging means having a stronger urging force than the first urging means for rotationally urging the cassette door opening/closing lever in the direction of closing the cassette door. It is.

(Function) According to the above configuration, since the engagement portion between the cassette door opening/closing lever and the cassette door is only a surface, the thickness of the cassette door can be reduced. Therefore, the storage space when the cassette door is opened is small, and the device can be made thinner. Furthermore, since the cassette door opening/closing lever only contacts the inner surface of the cassette door and does not engage with it, the front cabinet can be easily attached to and removed from the main body of the apparatus. Roughly speaking, the cassette door opening/closing lever rotates with the rotation of the arm gear, and when the tip is about to separate from the cassette door, the cassette door rotates following the opening/closing lever due to the biasing force of the cassette door spring.
Open the cassette slot.

(Embodiment) Hereinafter, an embodiment of a front loading device according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the figure, parts that are the same or equivalent to those of the conventional example shown in FIG. 4 are designated by the same reference numerals, and their explanation will be omitted. The feature of this embodiment is the support structure of the cassette door 14 and the engagement structure of the cassette door opening/closing lever 17 with the cassette door 14 and the arm gear 9. A pivot point 15 of the cassette door 14 is attached to the upper end of the front cabinet 6, and a first cassette door spring 21 provided at the pivot point 15 is attached to the cassette door 14.
The cassette insertion lower is rotated in the direction of closing.

A pin 18 implanted in one end of the cassette door opening/closing lever 17 on the front cabinet 6 side has a
The inner surface of the first spring 21 is pressed into contact with the biasing force of the first spring 21 . Also, the cassette door opening/closing lever 17
The other end of a second spring 22, one end of which is fixed to the cassette holder bracket 2, is fixed to the other end.
The second spring 22 biases the cassette door opening/closing lever 17 to rotate clockwise in the figure. The other end of this cassette door opening/closing lever 17 is connected to the arm gear 9.
It can engage and come into contact with a drive boss 19 implanted in the drive boss 19 . Further, the biasing force of the second spring 22 is stronger than the biasing force of the first spring 21, and when the other end of the cassette door opening/closing lever 17 is separated from the drive boss 19, the opening/closing lever 17 is One end is the cassette door 14
Press to close the cassette insertion lower.

Next, the operation of this embodiment will be explained. When the cassette tape 8 is inserted into the cassette insertion lower formed in the front cabinet 6, the cassette door 14 is opened as shown by the solid line in FIG.
is pushed by the cassette tape 8 and rotates the cassette door opening/closing lever 17 against the biasing force of the second spring 22 to open the cassette insertion lower. When the cassette tape 8 is held by the cassette holder 3 and moves together with the cassette holder 3, and the cassette tape 8 is disengaged from the cassette door 14, the cassette door opening/closing lever 17 is moved by the biasing force of the second spring 22. 1, the cassette door 14 is rotated counterclockwise in the figure against the biasing force of the first spring 21, and the cassette insertion lower is closed again. When ejecting the cassette tape 8, before the cassette tape 8 reaches the position of the cassette door 14, the drive boss 19 installed on the arm gear 9 is rotated clockwise in the figure to move the drive boss 19 onto the cassette door opening/closing lever 17. , and rotate this cassette door opening/closing lever 17 counterclockwise to remove the pin 1 implanted at the tip.
8 is removed from the inner surface of the cassette door 14. As a result, the cassette door 14 is unlocked, and the cassette door 14 is rotated clockwise in the figure by the biasing force of the first spring 21 to open the cassette insertion lower. In this way, the cassette tape 8 can be discharged to the outside from the cassette insertion lower.

According to this embodiment, since the pivot point 15 of the cassette door 14 is provided at the top of the front cabinet 6, the distance from the pivot point 15 to the surface of the front cabinet 6 is shortened, and the thickness of the cassette door 14 is reduced. can be made thinner. Furthermore, while conventional cassette doors require a wall to open and open, this embodiment has a structure in which the cassette door opening/closing lever 17 pushes against the inner surface of the cassette door 14, so the door can be thinned by at least the thickness of the wall. can do. As a result, the space required to open the cassette door 14 and store it in the upper cabinet 20 side is small, and the device main body 5 can be made thin. Further, when the front cabinet 6 is to be attached or detached, the cassette door 14 and the cassette door opening/closing lever 17 are not connected, so that the front cabinet 6 can be attached and detached easily.

FIG. 3 shows another embodiment of the invention. In this embodiment, a cam groove 9a is formed in the arm gear 9, and a boss 23 provided at the tip of the cassette door opening/closing lever 17 is engaged with the cam groove 9a. The shape of the cam groove 9a is such that at the cassette mounting position, the cassette door opening/closing lever 17 pushes the cassette door 14 and restricts the cassette insertion lower to the closing position, and at the cassette ejecting end position, the cassette door opening/closing lever 17 is free to rotate. , is shaped so that the cassette door 14 can be opened and closed freely. According to this embodiment, when a cassette is installed, the cassette door 14 cannot be opened even if it is pushed by hand, so it is impossible to put your hand into the cassette insertion lower, and your hand will not be accidentally caught when ejecting the cassette. .

[Effects of the Invention] As described above, according to the present invention, the thickness of the cassette door can be reduced, and the device main body can be made thinner. Additionally, the entire cabinet can be easily installed and removed.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of a front loading device according to the present invention, FIG. 2 is a side view of main parts showing the operation of FIG. 1, and FIG. 3 is a main part showing another embodiment of the present invention. Part side view,
FIG. 4 is a side view showing a conventional front loading device, FIG. 5 is a side view of main parts showing the operation of FIG. 4, and FIG.
FIG. 7 is a side view of main parts of another conventional front loading device. 3...Cassette holder, 5...Device main body 6...
Front cabinet, 7...Cassette insertion slot 8...Cassette tape, 9...Arm gear 9a...Cam groove, 12...Arm 14...Cassette door, 15...Rotation fulcrum 17.・
・Cassette door opening/closing lever 19...Drive boss 21...First spring (first biasing means) 22・
・Second spring (second biasing means) 23...Boss agent Patent attorney Rules Konishi Kenji Hiroshi Uji Figure 2 Figure 3

Claims (3)

[Claims] (1) A cassette door that is openable and closable in a cassette insertion slot formed on the front surface of the magnetic recording/reproducing device to insert and eject a cassette tape, and a cassette holder that supports the inserted cassette tape; The front loading device includes an arm gear for moving the cassette holder via an arm, and a first biasing device biasing the cassette door in a direction to open the cassette door; , a cassette door opening/closing lever whose other end engages with an engaging portion provided on the arm gear and is rotatably supported by the device body; and the cassette door opening/closing lever is rotatable in a direction to close the cassette door. and a second urging means having a stronger urging force than the first urging means. (2) The front loading device according to claim 1, wherein the engaging portion provided on the arm gear is a drive boss that abuts one end of the cassette opening/closing lever. (3) The front loading device according to claim 1, wherein the engaging portion provided on the arm gear is a cam groove that engages with a boss provided at one end of the cassette opening/closing lever.