JP2517503Y2 - Tape loading mechanism - Google Patents

Description

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

[Conventional technology]

8 to 9 are plan views showing a conventional tape loading mechanism disclosed in, for example, Japanese Utility Model Laid-Open No. 61-105938, (1) is a chassis, (2) (3) is a chassis ( Guide grooves formed in 1), tape guide blocks (4) and (5) slidably supported in guide grooves (2) and (3), and tape guide blocks (6) and (7) (4)
A stopper for positioning (5), a rotating drum (10),
(11) is a tension arm, (12) is a tension pole (1) which is erected at one end on the tension arm (11).
3) is a driven pin that is erected on the other end of the tension arm (11), (14) is erected on the chassis (1), and the shaft that supports the tension arm (11) is (15) , A tension spring (20) for constantly urging the tension arm (11) in a counterclockwise direction, a loading cam member driven by a motor (not shown), and (21) a reciprocating lever. Pins (22) (23) and reciprocating lever (2
1) It is engaged with guide grooves (24) (25) provided on the upper side and supported reciprocally. The reciprocating lever (21) has a pin (26) at one end, engages with a cam groove (not shown) formed on the loading cam member (20), and reciprocates in response to cam rotation. . A middle part of the reciprocating lever (21) has a second reciprocating lever (20) supported so as to reciprocate with respect to the reciprocating lever, and a rack (28) is provided at a part of the member. (29) is a pinch roller arm, one end of which is pivotally supported by a pin (30) provided upright on the chassis, and the other end of which has a pinch roller (31). (32) is a gear part that meshes with the rack (28). (33) is a capstan shaft provided on the chassis, (34) is an arm that has an intermediate portion pivotally supported by a pin (35) on the chassis (1), and has one end provided on one end of the reciprocating lever (21). Engages with the engaged groove (36). (37) is a lever, one end of which is engaged with the end of the arm (34), and the other end of which is engaged with a pin (38) erected on the chassis (1) and a guide groove (39). And is slidably supported.

The tape guide blocks (4) and (5) are connected to the loading cam member (20) by a drive transmission system (not shown), and are moved by the rotation of the loading cam member (20). You can do it.

Next, the operation will be described. FIG. 8 is a plan view showing a tape loading completed state, in which the tape guide blocks (4) and (5) are in contact with the stoppers (6) and (7),
The pinch roller (31) is in contact with the capstan (33), and the magnetic tape (not shown) constitutes a tape path capable of recording and reproducing. The tension arm (11) is in a loading position where tension control can be performed.

When the unloading operation is started, the loading cam member (20) is rotated by a motor (not shown), and the reciprocating lever (21) is moved in the direction of arrow A in the figure in response to the rotation. At that time, the pinch roller (31) also moves in the direction of arrow B in the figure via the second reciprocating lever (27), the rack (28), the gear (32), and the pinch roller arm (29). The arm (34) rotates by engaging with the groove (36) on the reciprocating lever (21), and the lever (37) moves in the direction of arrow C in the figure. After the end portion (37a) of the lever (37) contacts the driven pin (13) of the tension arm (11), the tension arm (11) is rotated in the direction of arrow D in the figure. The rotation of the loading cam member (20) moves the tape guide blocks (5) and (6) in the unloading direction via a drive transmission system (not shown).

When the loading cam member (20) continues to rotate, it reaches the unloading state as shown in FIG. In this state, the tape guide blocks (4), (5) and the tension pole (12) are arranged in the internal space of the tape cassette.

Next, the loading operation will be described. At the time of loading, the operation is the reverse of the above description. That is, in response to the rotation of the motor, the tape guide blocks (4) and (5) move along the guide grooves (2) and (3), and the stopper (6)
Reach (7). On the other hand, due to the rotation of the loading cam member (20), the reciprocating lever (21), the arm (34), and the lever (37) move in the opposite direction to that during the unloading. Since the tension arm (11) is biased counterclockwise in the figure by the tension spring (15), the driven pin (1)
When 3) rotates counterclockwise while contacting the end (37a) of the lever (37) and reaches the loading state as shown in FIG. 8, the driven pin (13) and the end are The loading position of the tension arm (11) comes into contact with the portion (37a).

[Problems to be solved by the invention]

As described above, in the conventional tape loading mechanism, the movement of the tension arm to the loading position and the unloading position is performed by the drive transmission system including many components such as levers from the loading cam member. On the other hand, the tape guide block is also moved from the loading cam member by a drive transmission system different from the drive transmission system. Therefore, it is difficult to obtain the mutual dimensional relationship between the tension arm and the tape guide block due to the component errors of the above-mentioned two types of drive transmission systems. Especially, in the unloading state, the two cause dimensional interference. There is a risk that the tape may come into contact with the side wall of the internal space of the tape cassette or the magnetic tape.

The present invention has been made to solve the above problems, and to obtain a highly reliable tape loading mechanism that does not interfere with each other, because the dimensional relationship between the tension arm and the tape guide block is easily obtained. To aim.

[Means for Solving Problems] A tape loading mechanism according to the present invention provides a tension guide arm and a tape guide block drive from a loading transmission member operated by a loading cam member. Moves in a first movement range from the unloading position to the intermediate standby position and in a second movement range from the intermediate standby position to the loading position, and in the first movement range, the swing arm should contact the tension arm. And moves in response to the mode switching member that engages with the loading cam member in the second movement range.

[Action]

In the tape loading mechanism according to the present invention, when the loading transmission member is moved by the rotation of the loading cam member, the loading guide member is engaged with the loading guide member to move the tape guide block, and the tension arm causes the loading transmission member to move. Is rotated via a swing arm and moves in response to a mode switching member engaged with the loading cam member.

[Example of device]

An embodiment of the present invention will be described below. Fig. 1 ~
FIG. 3 is a plan view of an embodiment of the tape loading mechanism according to the present invention, and FIGS. 4 to 5 are plan views of the tape loading mechanism according to the embodiment of the present invention in which the back surface of the deck is seen through from the front. , FIG. 6 and FIG. 7 are detailed views of the main parts.
(1) to (7) and (10) are the same as the conventional device. (11) is a tension arm. The intermediate portion of the shaft is supported by a shaft (14) which is erected on the chassis (1), and a tension pole (12) is erected on one end. (15)
Always biases the tension arm (11) counterclockwise with a tension spring. (123) is a loading cam member, which is rotatably supported by a shaft (137) provided upright on the chassis (1) and has cam grooves (136) and (138) which are displaced from the outer circumference to the inner circumference on the front surface and the back surface respectively. Has been formed. Reference numeral (121) is a motor, and (122) is a deceleration transmission means for transmitting the driving force of the motor (121) to the loading cam member (123). (12
4) is an arm, one end of which is pivotally supported by a shaft (134) which is erected on the chassis (1), and which has a pin (135) and the cam groove (13).
The pin (125) that engages with 6) is erected. (126)
The mode switching member 1 is a pin (128) standing on the chassis (1) and a guide groove (126) provided on the member (126).
a) and the guide groove (12) provided on the chassis (1)
7) and a pin (129) provided upright on the member (126) are engaged with each other and reciprocally attached to the upper surface of the chassis (1). A groove (126b) that engages with a pin (135) on the arm (124) is formed at one end of the member (126), and a reel brake (not shown) is provided on the member (126). A gum portion (126c) for controlling is also provided. (130) is the mode switching member 1 (126) and pin (12)
With the mode changeover member 2 fixed by 9), this pin (12
9) penetrates the guide groove (127) formed in the chassis (1), and the pin (132) erected on the mode switching member 2 (130) is formed in the chassis (1). It is reciprocally supported by engaging with the guide groove (131) and can move integrally with the mode switching member 1 (126). The member (130) is provided with a cam portion (133) for controlling a reel brake (not shown). Reference numeral (62) denotes an arm, one end of which is pivotally supported by a shaft (63) provided upright on the chassis (1), and the other end of which is a pin (64) engaging with the cam groove (138) and another pin ( 6
3). (50) is a lever as a loading transmission member, which is a pin (59) (6
0) (61) and long grooves (50a) (50b) provided in the member
(50c) is engaged and attached reciprocally. Further, a groove (50d) engaging with the pin (65) on the arm (62) is provided at one end of the member, and the pin (53) is provided near the other end.
Is erected. Reference numerals (55) and (56) are loading links each including two links, and gears (57) and (58) are fixed to one ends of the links, and the gears mesh with the racks (51) and (52), respectively. . The other ends are engaged with the tape guide blocks (4) and (5), respectively. (13) is a swing arm, which is rotatably supported by a shaft (16) erected on the chassis, and a groove (13a) provided at one end engages with the pin (53). The other end has a first contact portion (13b) and a second contact portion (13c) that should contact the tension arm (11).
The second contact portion is formed in an arc shape with respect to the shaft (16) which is the rotation center of the swing arm (13).

Next, the operation will be described. FIG. 1 and FIG. 4 are plan views showing a tape loading completed state, and the magnetic tape (40) constitutes a tape path capable of recording and reproducing. The tension arm (11) is in the loading position where tension control can be performed. When the unloading operation starts, the motor (121) rotates,
The loading cam member (123) starts rotating in the direction of arrow E in the figure via the deceleration transmission means (122). Cam groove (1
36) in response to the change from the inner circumference to the outer circumference,
4) rotates in the direction of arrow F in the figure, and further, mode switching member 1 (126) and mode switching members 1 (126) and 2 (130).
After the cam portions (126c) and (133) provided above have passed a mode for performing a predetermined brake control, the tape unloading mode is set, and the mode switching member 2 (130).
The pin (132) provided as an abutting portion abuts on the convex portion (113) as a driven portion at the end of the tension arm (11), and the tension arm (11) is rotated clockwise in the figure. To move. When the tension arm reaches the intermediate standby position as shown in FIG. 2, the pin (125) erected on the arm (124) reaches the outermost concentric circle portion of the cam groove (136),
Arm (124), mode switching members 1 (126) and 2 (13
Movement of 0) stops. Thus, the tension arm (11) is moved by the mode switching members 1 (126) and 2 (130) in the second movement range from the loading position shown in FIG. 1 to the intermediate standby position shown in FIG. To be made.

When the loading cam member (123) further rotates, as shown in FIG. 4, the groove (138) provided in the loading cam member (123) responds to the change from the inner circumference to the outer circumference,
The arm (62) rotates in the direction J in the figure, and the lever (50)
Moves in the direction of arrow K in the figure, and by the racks (51) and (52) on the lever (50), the loading link (55).
The driving force is transmitted to (56) and the tape guide blocks (4) and (5) are unloaded, and at the same time,
The movement of the lever (50) causes the swing arm (13) to rotate in the direction of the arrow L, so that the contact portion (13b) at one end contacts the driven portion (114) at the end of the tension arm (11). The tension arm (11) rotates clockwise in the figure by the contact with the swing arm (13), but the contact point with the swing arm (13) is the first contact portion ( 13b) to the second concentric contact portion (13c) of the shaft (16). And FIG.
The unloading position shown in FIGS. 5 and 7 is reached. In this way, the tension arm (11) is moved by the swing arm (13) in the first movement range from the intermediate standby position shown in FIG. 2 to the unloading position shown in FIG.

Next, the loading operation will be described. From the state shown in FIG. 3 and FIG. 5, the motor (121) starts rotating in the direction opposite to that during unloading, and the lever (50) is moved in the direction of arrow M in the figure via the arm (62). To move. Then, the tape guide blocks (4) and (5) start moving from the unloading position toward the stoppers (6) and (7), and at the same time, the rocking arm (13) rotates counterclockwise. , The part that contacts the tension arm (11)
The tension arm (1) moved from the second contact portion (13c) to the first contact portion (13b) and urged by the tension spring (15).
1) follows the rotation of the swing arm (13) and rotates in the loading direction. After rotating for a while, the intermediate standby position shown in FIG. 1 is reached, and when the convex part (113) of the tension arm (11) contacts the pin (132), the rotation of the tension arm (11) is momentarily stopped. To do. When the loading cam member (123) further rotates, the mode switching members 1 (126) and 2
(130) moves in the direction H in the figure, and the tension arm (1
1) rotates counterclockwise in the figure while maintaining the abutting relationship with the pin (132), and eventually the abutment with the pin (132) separates to the loading position shown in FIG. Reach

Thus, the tension arm (11) contacts the swing arm (13) in the first movement range from the unloading position to the intermediate standby position, regardless of whether the tension arm (11) is driven in the loading direction or the unloading direction. In addition, in the second movement range from the intermediate standby position to the loading position, the loading cam member (12
3) Mode switching members 1 (126) and 2 (130) engaged with
At the unloading position, the concentric second contact portion (13) formed on the swing arm (1).
By making contact with b), the rotation position of the tension arm (11) is determined.

In the above embodiment, the driving force is transmitted from the motor to the mode switching member or the lever by the cam and the pin erected on the arm. However, the present invention is not limited to this.
For example, it may be continuous transmission by gears or the like, or intermittent transmission such as notch gear standby or the like. Further, although the cassette type rotary head tape recorder has been described in the above embodiment, it is needless to say that it can be applied to the loading mechanism of the cassette type VTR.

[Effect of device]

As described above, according to the present invention, when the loading transmission member is moved by the rotation of the loading cam member, the loading guide member is engaged with the tape guide block to move the tension arm. While being rotated from the loading transmission member via the swing arm,
Since it moves in response to the mode switching member that engages with the loading cam member, it is easy to obtain a mutual dimensional relationship between the tape guide block and the tension arm, and especially in the unloading state, the two may cause dimensional interference. There is an effect that it is possible to obtain a highly reliable tape which is not damaged by contact with the side wall of the inner space of the tape cassette or the magnetic tape.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, showing a loading state. FIG. 2 is a first view showing an intermediate standby position
FIG. 3 is a diagram corresponding to FIG. 3, FIG. 3 is a diagram corresponding to FIG. 1 showing an unloaded state, and FIG. 4 is a perspective view showing a rear surface of the deck. FIG. 5 shows the unloading state, which is equivalent to FIG. 4, FIG. 6, and FIG. 7 are detailed views of the main parts. FIG. 6 shows the intermediate standby position, and FIG. 7 shows the unloading state. FIG. 8 is a plan view showing a conventional tape loading mechanism in a loading state, and FIG. 9 is a view corresponding to FIG. 8 showing an unloading state. In the figure, (1) ... chassis, (4), (5) ... tape guide block, (10) ... rotating bed, (11) ... tension arm, (12) ... tension pole, ( 13) …… Rotating arm, (50) …… Loading transmission member, (55),
(56) …… Loading link, (123) …… Loading cam member, (126), (127) …… Mode switching member,
(13b) ... Second contact portion The same reference numerals in the drawings indicate the same or corresponding portions.

Claims (1)

(57) [Scope of utility model registration request] 1. A rotary drum provided on the chassis, a tape guide block which moves between a loading position and an unloading position along a predetermined path provided on the chassis, and a tape guide which is erected on the tape guide block. And a tension arm pivotally supported by the chassis to move between the loading position and the unloading position, a tension pole installed upright on the tension arm, the rotary drum, the tape guide, and the tension pole. In a tape loading mechanism including a magnetic tape, a loading cam member that obtains a predetermined mode position by a driving force of a motor, a loading transmission member that moves by engaging the loading cam member, and the loading transmission member. The tape guide block to the loading position. A second abutment that engages with the loading transmission member and is pivotally supported by a shaft that is erected on the chassis, and that is formed concentrically with respect to the shaft and a loading link that moves at the unloading position. And a swing arm for holding the position of the tension arm by contacting the tension arm during unloading by means of a section, the tension arm extending from the unloading position to the intermediate standby position. The first movement range and the second movement range from the intermediate standby position to the loading position are moved, and the tension arm is moved in the first movement range by the swing arm contacting the tension arm. However, in the second movement range, the tape roll moves in response to a mode switching member engaged with the loading cam member. Trading mechanism.