JPS60154343A - Azimuth adjustment mechanism of tape recorder - Google Patents

Abstract

PURPOSE:To attain optimum adjustment of azimuth even in the reverse direction of an automatic reverse deck by using a prescribed elastic member and adjusting member so as to change the angle of a pinch roller shaft to the chassis. CONSTITUTION:A part between a head base 2 and a pinch roller arm 14 is provided with the 1st elastic member 17 made of a coil spring pushing upward the pinch roller arm to the chassis 1 and a frame 16 is provided with the 2nd elastic member 18 and an adjusting member 9 pushing a pinch roller shaft 13 in the direction of the head base 2. Then the mechanism is constituted that the angle of the pinch roller shaft 13 to the tape deck chassis 1 is changed by adjusting the adjusting member 9. Since the azimuth adjustment is conducted independently to each running direction, the optimum azimuth adjustment even in the reverse direction is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an azimuth adjustment mechanism that is particularly effective for auto-reverse decks.

(Prior Art) Generally, the tape running angle in a tape recorder is determined by the contact state between the capstan (4) in the normal direction and the pinch roller (6) when the tape (101) runs as shown in FIG. Conventionally, the azimuth adjustment was performed by adjusting the mounting angle of the head (3) in the direction of arrow A using a screw (9) for the running trajectory of the tape QO+.

(Problems with the prior art) By the way, in the auto reverse deck, the capstan (4) on the normal side, which is related to tape running in the normal direction.
In addition to the pinch roller (5), the reverse side carbstan (old) and pinch roller (121), which are related to tape running in the reverse direction, are provided. DI, (1
The contact state in [2] does not necessarily match due to variations in processing and the like. Therefore, there is a problem in that only adjusting the azimuth in the normal direction causes variations in the azimuth in the reverse direction.

(Object of the Invention) An object of the present invention is to provide an azimuth adjustment mechanism that can optimally adjust the azimuth even in the reverse direction of such an auto-reverse deck.

(Structure of the Invention) The azimuth adjustment mechanism of the tape recorder according to the present invention includes:
By adjusting the position or angle of the pinch roller, the contact state between the capstan and the pinch roller is adjusted, and the tape running locus is made to match the mounting angle of the head.

(Embodiment of the Invention) FIGS. 2 to 4 are an assembly diagram of main parts and an explanatory diagram of the operation according to an example of the present invention.

In Figures 2 to 4, (1) is a deck chassis;
(Lυ is a reverse direction capstan, and the capstan Uυ is installed vertically and rotatably on the deck chassis (1). (The eye is a pinch roller arm fixed vertically on the deck chassis (1). Support column (1 (A) is a pinch roller arm attached to the pinch roller arm support Uω so as to be rotatable and movable in the direction of arrow B in FIG. 2, 03 is a pinch roller shaft, (12 is a pinch roller) (■61 is a frame that is integrated with the deck chassis (1), (2) is a head base that is attached to be movable in the direction of arrow C, (lη is one end that is fixed to the head base (2), , the other end is a pinch roller arm (14)
The first elastic member of the coil spring (181) is fixed to the frame (161) at one end, and the height of the other end is adjustable between the frame (161 and the pinch roller arm (1)). In the meantime, the second elastic member 091 of the leaf spring, which is attached to the state where the elastic capacity is realized, is moved by D+''D% in the direction of the arrow.
18) is an adjustment member that adjusts the height of. GO+ is a tape located between the capstan (lυ) and the pinch roller (12).

Figure 3 shows Ki Buhetan (11) and Pinch-La (12).
Figure 4 shows the relationship between each member when the capstan (111 and pinch roller 02) are in a non-contact state, when the capstan (111 and the pinch roller 02) are in a non-contact state, when the capstan (111 and the pinch roller 02) are in a non-contact state, when the capstan (111 and the pinch roller 02) are in a contact state, that is, when they are in a reverse running mode. (2) shows the relationship of each member when the vehicle is in reverse running stop mode with the vehicle moving backward.

Next, I will explain about azimuth adjustment. First, in the normal direction running mode, as in the conventional case, the head (3) is ) are mounted by matching the angles.The mounting angle of the head (3) is adjusted by the first adjustment member (9).

Finally, for the reverse running mode, the contact state between the pinch roller (12) and the capstan Q11 is adjusted, and the installation of the previously trained head (3) is performed using tape (lO ) by matching their walking trajectories.

The adjustment mechanism at this time will be explained in detail.

The pinch roller arm (I) is pivotally supported by the pinch roller arm support Q- with a range of freely interlocking capability in the direction of arrow B in FIG. The elastic member (1η) always presses the deck chassis (1) in the upward 0111 direction.On the other hand, in the reverse running mode, the upper end of the pinch roller shaft (131) protruding from the pinch roller arm t14 , since it is in contact with the second elastic member u81, the pinch roller shaft (131) and the pinch roller arm (
The 1st winner is also pushed in the downward A11 direction.

Pinch roller against the pinch roller arm support ctb (
The position of 12) is determined by the balance of forces in the upward and downward directions 1011. Therefore, g=move the member o9I in the direction of the arrow v! , 1, and adjust the position of the second elastic member to adjust the angle and position of the pinch roller (121).In other words, the contact state between the pinch roller (1) and the capstan (11) is adjusted. is determined, and the tape running trajectory is adjusted.In this way, the head (3) is installed by matching the tape running trajectory with respect to the angle and adjusting the azimuth.In the running stop mode, the head base (2 ) moves backward, and the pinch roller t121 is separated from the capstan 01) as shown in Fig. 4. At this time, the pinch roller arm 01) also moves backward, and the pinch roller shaft (I3) moves backward.
The protrusion is spaced apart from the second elastic member (18).

In addition, in the embodiment described above, a screw is used as the second adjustment member, but it is also possible to use a cam or the like in addition to the screw.

Further, in the above embodiment, the azimuth adjustment mechanism according to the present invention is used to adjust the tape running trajectory in the reverse direction, but it can of course also be used to adjust the tape running trajectory in the normal direction.

(Effects of the Invention) As explained above, the present invention provides a pinch roller arm support vertically mounted on a tape deck chassis;
a pinch roller arm rotatably attached to the pinch roller arm support; a pinch roller rotatably attached to the pinch roller arm; and a first elastic member that presses the pinch roller arm upwardly against the chief chitsuki chassis. , a second elastic member that presses the pinch roller shaft toward the hand base, and a W, 4 adjustment blade that adjusts the elastic force of the second elastic member, and by adjusting the adjustment member, the tape deck can be adjusted. Since the angle of the pinch roller axis with respect to the chassis is changed, the azimuth adjustment S for each traveling direction can be performed independently for the mounting angle of the head. Therefore, optimum azimuth adjustment can be obtained in auto-reverse decks, etc., and the effect is remarkable.

[Brief explanation of the drawing]

Figure 1 is an assembly diagram of the main parts of the IJ bar tape recorder, Figure 2 is an explanatory diagram of the pinch roller, and Figure 3 is (A).
Figures 4 (a) and 4 (b) are assembly diagrams of the main parts in the tape running state in an embodiment of the present invention; . (11 deck chassis (21 bottom base (31, do) (4 legs Capstan E + pinch roller (6) pinch roller shaft (7) pinch roller arm (8) head fixing member (9) screw 1/0) tape ( 11) Capstan (1) Pinch roller Q31 Pinch roller shaft (1) Pinch roller arm Q plane Pinch roller arm support (16) Frame (1) 1st elastic member 0 mark 2nd
Elastic member 09 Adjustment member Fig. 3 (c) L C Ij Fig. 4 (b) (In

Claims (1)

[Claims] On the tape deck chassis, there is a pinch roller arm support vertically attached to the chassis, a pinch roller arm rotatably attached to the pinch roller arm support, and a pinch roller rotatably attached to the pinch roller arm. a second elastic member that presses the pinch roller arm upwardly against the chassis and in a direction that presses the pinch roller against the capstan; a second elastic member that presses the pinch roller shaft toward the head base; 2. An adjustment part for adjusting the elastic force of the elastic member, and the angle of the pinch roller axis with respect to the tape deck chassis can be changed by adjusting the entire adjustment member NM. Azimuth adjustment mechanism.