JPH04143958A - Cassette tape loading device - Google Patents

Abstract

PURPOSE:To obtain this cassette loading device requiring a weak driving force for loading by abutting the contact piece of an insertion lever on the engaging part of an arm whose rotating position is fixed with a cam gear when the cassette is loaded and preventing the rotation of the lever with the pressing force of a tension spring. CONSTITUTION:The arm 105 is pivotally supported directly turnably to the cassette holder 5, engaged with the cam gear 114, 115 which rotate through a power transmission mechanism A, and provided with the engaging part 105a. An ejection lever 130 supported pivotally in freely rotatable condition is provided on the main body of the device, and the contact part 132 to be abutted on the engaging part 105 is disposed while the rotation of the lever is prevented by the tension spring 135. At the time of loading or unloading of the cassette, the cam gear opens/closes switches from (a) to (c), drives the power transmission mechanism A, and reduces the driving force for loading and unloading. Also, when at the time of unloading the cassette the external force is added to the holder 5 with the insertion of a foreign object, etc., the contact piece 132 of the lever 130 is abutted on the engaging part 105 of the arm in the rotation direction, stops the rotation of the arm 105, and prevents the malfunction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape cassette loading device for a magnetic recording/reproducing device.

[Conventional technology]

FIG. 8 is a conceptual perspective view showing a conventional tape cassette loading device disclosed in, for example, Japanese Utility Model Application Publication No. 63-74741, where ■ is the chassis of the magnetic recording/reproducing device, and 2 is a power transmission provided in the chassis I. A gear of mechanism A, 3 a tape cassette, 3a a grip groove formed in the tape cassette 3, 4 a lid rotatably supported on the tape cassette 3, and 5 a cassette holder holding the tape cassette 3. , 6 are push springs attached to the cassette holder 5, 7 and 8 are guide bins attached to the rear of both sides of the cassette holder 5, and 9 and 1 are attached to the front of both sides of the cassette holder 5, respectively. Guide pin, 11.12
are holder side plates attached to both sides of chassis 1,
13.14 are guide grooves formed on the holder side plates 11.12, 15.16 are guide grooves formed on the holder side plates 11.12, and 17.18 are guide grooves formed on the holder side plates 11.12, respectively.
19 is a guide groove formed in the holder side plate 12; 20 is a guide groove formed in the cassette holder 5; 21 is a lever engaged in the guide groove 19, 20;
2 is a bottle implanted in the lever 21 and inserted into the guide groove 19, 20; 23 is a pressing portion formed on the lever 21;
4 is a lid opening/closing piece formed on the lever 21, 25 is a cam formed on the holder side 112, and 26 is a holder side plate 111.
2, 27 and 28 are cam grooves formed on the side surfaces of the slide plate 26, 2930 are cam grooves formed on the slide plate 26, and 31 and 32 are cam grooves formed on the side surfaces of the slide plate 26. 33. guide grooves formed respectively;
34 are guide grooves formed on the side surfaces of the slide plate 26, 35° and 36 are grooves attached to the side surfaces of the slide plate 26, and 37 and 38 are implanted in the holder side plates 11 and 12, respectively. 31 and 32 are respectively inserted guide pins, 39 is a movable plate provided on the outside of the slide plate 26,
40 is formed on the moving plate 39, and is connected to the gear 2 of the power transmission mechanism A.
41 is formed on the moving plate 39,
A rack engaged with the gear 17, 42 a hook rotatably supported on the upper surface of the slide plate 26, 43 a tension spring engaged with the slide plate 26 and the rim 42, and 44 a hook 42; A contact piece 45 is a lever rotatably supported on the slide plate 26. A contact portion 46 is a contact portion formed on the lever 45. A contact piece 47 is a contact piece formed on the lever 46.
is a tension spring engaged with the slide plate 26 and the lever 45;
Reference numeral 49 indicates an ejector lever 1-50, which is rotatably supported on the slide plate 26. Reference numeral 51 indicates a roller, which is rotatably supported on the eject lever 49. Reference numeral 52 indicates a contact portion, which is rotatably supported on the eject lever 49. A contact portion formed on the eject lever 49, 53 a guide piece formed on the holder side plate 11, and 54 the eject lever 49 and the slide plate 2.
6 is a tension spring engaged, 55 is a convex portion formed on the rack 41, 56 is a lever rotatably supported on the holder side plate 12, 57 is a contact portion formed on the lever 56, and 58 is a lever. Sliding contact piece formed at 56, 59 is the holder side plate 11
The door 12 is rotatably supported by a shaft, and 60 is a guide pin formed on the door 59.

Next, the operation will be explained. When the user inserts the tape cassette 3 into the cassette holder 5, the lid 4 comes into contact with the roller 50, and the eject lever 49 moves to the cwz position shown in the figure.
The contact portion 52 contacts the contact portion 47, and the lever 45 rotates in the cwx direction against the biasing force of the tension spring 48. As a result, the abutting portion 46 abuts the abutting piece 44, so the hook 42 resists the biasing force of the tension spring 43 and c
Rotate in the cwy direction. As a result, the hook 42 and the grip groove 3a engage with each other, and the tape cassette 3 is actively prevented from falling off from the cassette holder 5. At this time, the switch a comes into contact with the eject lever 49, and the main body of the magnetic recording/reproducing apparatus drives the gear 2 of the power transmission mechanism A.
rotates in the CWZ direction, and the moving plate 39 moves in the X2 direction via the rank 40 engaged with the gear 2. Therefore, the gear 17 engaged with the rack 41 rotates in the (wy force direction), and the slide plate 26 moves in the X1 direction via the rack 35. When the slide plate 26 moves in the X1 direction, the cam groove 27
The guide pins 7 to 10 inserted into the guide grooves 13 to 16 slide along the shapes of the respective guide grooves 13 to 16, and the cassette holder 5 moves in the X1 direction. At this time, in order to avoid interference between the power transmission mechanism A provided on the chassis l and the lid 4, the lever 21 is rotated in the cwy direction by sliding contact between the cam 25 and the pressing part 23, and the lid opening/closing piece 24 is rotated in the cwy direction. , and the lint 4 rotates in the ccwy direction. When the cassette holder 5 moves in the X1 direction and reaches above the chassis 1 of the magnetic recording/reproducing apparatus, the cassette holder 5 moves in the Z2 direction along the shapes of the guide grooves 13 to 16 and is attached to the chassis 1. At this time, the switch C is pushed by the protrusion 55 of the rack 41 and turns on.
The rotation of the gear 2 to the power transmission mechanism is stopped, and the state becomes ready for playing. FIG. 9 is a flowchart showing the above operation.

Next, when a command is sent to eject the tape cassette 3 from the magnetic recording/reproducing device, the gear 2 rotates in the ccwz direction, the movable plate 39 moves in the X direction, and the slide plate 26 moves into the shape of the guide grooves 13 to 16. , and then the cassette holder 5 moves in the X2 direction. At this time, the sliding contact piece 58 contacts the guide bin 10, and the lever 56 rotates in the wy force direction. Therefore, the switch C contacts the convex portion 55, and the switch C is turned on, and the gear 2 is rotated. The rotational drive is stopped.At this time, the contact portion 51 is released from contact with the guide piece 53, the lever 49 is rotated in the CWZ direction by the urging force of the tension spring 54, and the roller 50 is moved toward the tape cassette 3.
is discharged from the cassette holder 5 in the X2 direction.

[Problem to be solved by the invention]

The conventional tape cassette loading device is configured as described above, and while the tape cassette is being loaded into the soyenner, the eject lever 49 is pulled against the biasing force of the tension spring 54 to move the roller 50 forward from the lid 4. In order to hold the cassette holder 5 in place, the cassette holder 5 is moved without sliding contact between the guide piece 53 and the abutting part 5, and there is a problem in that the driving load increases due to friction between the guide piece 53 and the abutting part 51. Ta.

Furthermore, if the user accidentally inserts a foreign object into the cassette holder 5, the guide piece 53 and the contact portion 51 will come into contact with each other to prevent the slide plate 26 from moving. The contact portion 51 continuously contacts the guide piece 53.
Since the eject lever 49 is rotated while slidingly contacting each other, the friction between the guide piece 53 and the abutment part 51 increases the load when inserting the tape cassette into the cassette holder 5, making it easier for the user to use the tape cassette. I was losing it. Alternatively, as a countermeasure, the hook 4 that engages with the grip groove 3a
Although it is conceivable to provide a mechanism for actively rotating the tape cassette 2 when ejecting the tape cassette, this poses a problem in that the number of parts increases and the device becomes complicated.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a simple tape cassette loading device that has a small loading driving force, is easy to use, and has a small number of parts.

[Means to solve the problem]

The tape cassette loading device according to the present invention is provided with a connecting portion on an arm that is rotatably supported directly on a cassette holder and engaged with a cam gear that rotates by receiving power from a power transmission mechanism, and a magnetic recording device. The eject lever is rotatably supported by the playback device and is provided with an abutment piece that comes into contact with the connecting portion.

Further, in addition to the above-mentioned matters, the tape cassette loading device according to the present invention is such that, when the tape cassette is ejected, the abutting piece of the eject lever prevents the operation of the connecting portion unless the eject lever is rotated. This is what I did.

[Function] In this invention, when the tape cassette is mounted on the chassis, the contact piece of the eject lever contacts the connecting portion of the arm whose rotational position is fixed by the cam gear, and the biasing force of the tension spring is applied. Rotation of the eject lever due to this is prevented.

In addition, in this invention, when an external force is applied to the cassette holder due to the insertion of a foreign object while the tape cassette is being ejected, the contact piece of the eject lever comes into contact with the arm connecting portion in the direction of rotation, and the rotation of the arm is prevented. thwarted.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
In the figure to the fourth time, 1 to 8 are the same as the conventional one. 10
0 is the housing attached to chassis 1, 101.1
02 are guide grooves formed in the housing 100, 1
03.104 is a lever rotatably supported on the side surface of the housing 100, and 105 is a lever 103.1 at both ends.
04 and rotatably pivoted on the cassette holder 5; 105a is a connecting portion of the arm 105; 106.107 is a throat opening/closing piece formed at both ends of the arm 105; 108.109 is a gutter opening/closing piece. Lever 103.
104 and a tension spring engaged at both ends of the arm 105;
Reference numerals 10 and 111 refer to abutting portions formed on the levers 103 and 104, respectively, reference numerals 112 and 113 refer to guide pins implanted in the levers 103 and 104, respectively, and reference numerals 114 and 115 refer to housing 1.
Cam gears 11 rotatably supported on the sides of 00
6.117 are respectively formed on cam gears 114 and 115,
a cam groove into which guide pins 112 and 113 are inserted, 118.
119 are cam grooves formed in the cam gears 114 and 115, 120 and 121 are levers rotatably supported on the side surfaces of the housing 100, 122 and 123 are guide pins implanted in the levers 120 and 121, and 124 .12
5 are contact pieces formed on the levers 120 and 121, respectively;
Reference numerals 26 and 127 refer to biasing springs respectively locked to parts of the levers 120 and 121, 128 a recess formed in the cam gear 114, 129 a protrusion formed in the cam gear 115, 13
0 is an eject lever rotatably supported on the upper surface of the housing 100, 13.1 is a roller rotatably supported by the eject lever 130, 132 is a contact piece formed on the eject lever 130, and 133 is an abutment lever. A sliding contact portion formed on the contact piece 132; 134 a locking portion formed on the eject lever 130; 135 a tension spring connected between the eject lever 130 and the housing 100; A rotatably supported synchronization shaft, 137 is a gear fixed to the synchronization shaft 136 and engaged with the gear 2 of the power transmission mechanism A, 138 and 139 are gears fixed to both ends of the synchronization shaft 136, and 140 is a gear A guide groove 141 formed in the housing 100 is connected to a door 1 whose both ends are rotatably supported on the side surface of the housing 100.
42 is a guide pin formed on the door 141, 143 is a contact piece formed on the lever 121, and 144 is a hook formed on the pressing spring 6.

Next, the operation will be explained. Tape cassette 3 x1
When inserted in the direction, the lid 4 comes into contact with the roller 131,
The eject lever 130 rotates in the CWZ direction, the switch a turns off, and in response to the signal command, the power transmission mechanism A of the magnetic recording and reproducing device operates, the gear 2 rotates in the cwy direction, and the power is Gear 13 via gear 137
8°139, cam gear 114.115 cw
Rotate in the y direction. As a result, the lever 120 rotates in the cwy direction due to the sliding contact between the guide pin 122 and the cam groove 118, and similarly, the lever 121 rotates in the cwy direction due to the sliding contact between the guide pin 123 and the cam groove 119. or,
At the same time, the lever 103 rotates in the cwy direction due to the sliding contact between the guide pin 112 and the cam groove 116, and similarly, the lever 104 rotates in the cwy direction due to the sliding contact between the guide pin 113 and the cam groove 117.
Rotate in the y direction. Also, the contact part of arm 105! 10° 111 at the same time and rotate in the cwy direction. When the arm 105 rotates in the cwy direction, the cassette holder 5 rotatably supported by the arm 105 moves in the X1 direction. Further, the connecting portion 105a makes sliding contact with the sliding contact portion 133 as shown in FIG. 7, and rotates the eject lever 130 in the CWZ direction.

During this process, in order to avoid interference between the power transmission mechanism A of the magnetic recording and reproducing device and the tape cassette 3, the lint opening/closing pieces 106 and 107 of the arm 105 come into contact with the lid 4 as shown in FIG. rotate in the direction. When the tape cassette 3 moves to the top of the magnetic recording/reproducing device,
Depending on the shape of the cam grooves 116 and 117, the levers 103 and 10
The rotation of the arm 105 is stopped, and the position of the arm 105 is fixed.

At the same time, due to the shape of the cam grooves 118 and 119, the lever 12
0.121 rotates in the ccwy direction. At this time, the guide pin 7.8 comes into contact with the lever 120.121, the cassette holder 5 rotates in the ccwy direction around the rotation wheel pivotally supported by the arm 105, and the tape cassette 3 is mounted on the chassis I. Ru.

When the tape cassette 3 is attached to the chassis 1, the protrusion 12
9 comes into contact with switch b, switch b is turned on, and gear 2 of the power transmission mechanism stops.

At this time, the eject lever 130 attempts to rotate in the CWZ direction due to the biasing force of the tension spring 135;
Since the sliding contact portion 133 is in contact with the connecting portion 105a, rotation is prevented.

Next, when the tape cassette 3 is ejected from the chassis 1, the gear 2 rotates in the ccwy direction, and the driving force is transmitted to the cam gears 114 and 115 via gears 137 to 139, which rotate in the ccwy direction. . As a result, the levers 120 and 121 rotate in the cwy direction, and the abutment piece 12
4, 125 contacts the guide bin 7.8 and rotates the cassette holder 5 in the cwy direction. At the same time, lever 121
A contact piece 143 formed in the guide bin 142 contacts the guide bin 142 and rotates the door 141 in the ccwy direction.

When the cam gears 114 and 115 further rotate, the cam groove 1
16. Due to the shape of 117, lever 103゜104 is cc
The cassette holder 5 is rotated in the wy direction and moved in the X2 direction, but since the door 141 has already been opened by the lever 121 at this time, the tape cassette 3 and the door 14
1 does not interfere.

When the guide bin 7.8 moves to near the end of the guide groove 101.102, the switch C enters the recess 128.
Switch C is turned off and the power transmission mechanism is stopped. At this time, the sliding contact portion 133 is released from sliding contact with the connecting portion 105a, the eject lever 130 is rotated in the c/c/wz direction by the biasing force of the tension spring 135, and the roller 131 moves the tape cassette 3 by the biasing force of the hook 144. Skein against.

eject from the eject lever 1 in the X2 direction from the eject holder 5.
30 stops at a position where its locking portion 134 abuts the end surface of the guide groove 140. At this time, the contact piece 132 is located above the connecting part 105a, so if the user accidentally inserts an object other than the regular tape holder in this state, a load will be applied to the cassette holder 5 in the X direction. However, since the connecting portion 105a is prevented from rotating in the ccwy direction by the contact piece 132, the switch a is not turned off and malfunction is prevented. FIG. 5 is a flowchart showing the above operation.

[Effects of the Invention] As described above, according to the present invention, a connecting portion is provided on the arm that is rotatably supported directly on the cassette holder and engages with the cam gear that rotates by receiving power from the power transmission mechanism. In addition, the eject lever rotatably supported by the magnetic recording/reproducing device is provided with an abutting portion that abuts the connecting portion, thereby providing a device with a small loading driving force.

Furthermore, when an external force is applied to the cassette holder due to the insertion of a foreign object at the tape cassette ejection position, the abutment piece of the eject lever comes into contact with the arm connecting portion in the direction of rotation, and the rotation of the arm is prevented. Therefore, a device with a simple configuration, easy to use, and less likely to malfunction can be obtained.

[Brief explanation of drawings]

Figures 1 to 4 are conceptual perspective views and side views of the device of this invention;
A plan view and a cross-sectional plan view of main parts, FIG. 5 is a flowchart showing the operation of the device of the present invention, FIGS. 6 and 7 are explanatory diagrams of the operation of the device of the invention, and FIGS. 8 and 9 are conceptual diagrams of the conventional device. FIG. 2 is a perspective view and a flowchart. 2... Gear, 3... Tape cassette, 4... Lid, 5... Cassette holder, 100... Housing, 105... Arm, 105a... Connection portion, 114
．． 115... Cam gear, 130... Eject lever 131... Roller, 132... Contact piece, 133
...Sliding contact part. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa Figure 9 Figure 9 Procedural amendment date 1998 Case indication MR, c, L-A7/ri 3 Patent application F1 filed on October 4, 1990, Title of the invention Tape cassette loading device 3, relationship to the amended person case Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Moriya Shiki 4, representative of Mitsubishi Electric Corporation, agent Address Mitsubishi Electric Corporation, 2-2-3 Marunouchi, Chiyoda-ku, Tokyo 225゜Full text of the specification subject to the amendment6゜Contents of the amendmentFull text of the specification as shown in the attached sheet. 7゜Inventory statement of attached documents or above

Claims (2)

[Claims] (1) In a tape cassette loading device in which a tape cassette having a lid for protecting the magnetic tape is inserted into a cassette holder and the tape cassette is mounted on a magnetic recording/reproducing device, the tape cassette is rotatably supported directly on the cassette holder and powered by a A connecting portion is provided on an arm engaged with a cam gear that rotates by receiving power from a transmission mechanism, and a contact piece that comes into contact with the connecting portion is provided on an eject lever rotatably supported on a magnetic recording/reproducing device. A tape cassette loading device characterized by being provided. (2) The tape cassette loading device according to claim 1, wherein when the tape cassette is ejected, the abutting piece of the eject lever prevents the connecting portion from operating unless the eject lever rotates. .