JP2803086B2 - Tape guide device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape guide device used for a rotary head type digital audio tape recorder or the like.

2. Description of the Related Art In recent years, a tape guide device has been required to have higher performance with the practical use of a rotary head digital audio tape recorder and the like.

Hereinafter, the above-described conventional tape guide device will be described with reference to the drawings.

FIG. 7 shows a side view of a conventional tape guide device. In FIG. 7, reference numeral 1 denotes a tape guide surface which runs while the tape surface is in sliding contact. Reference numeral 2 denotes an upper guide flange which regulates an upper edge position of the tape. Reference numeral 3 denotes a lower guide flange that regulates a lower edge position of the tape. 4 is the height adjustment screw, 5 is the head of the height adjustment screw, 6 is the support part, the screw of the height adjustment screw is screwed together, and the vertical height of the tape guide surface 1, vertical guide flanges 2, 3 Fine adjustment of 7 is a mounting part of a chassis etc., 8
Is a return spring that guides the tape guide surface and the upper and lower guide flanges (hereinafter referred to as a tape guide portion) to the head 5 of the height adjusting screw 4.
Urge toward. 9 is a tape.

With this configuration, the height of the tape guide portion can be adjusted by the height adjustment screw 4 during the mounting adjustment.

FIG. 8 is a side view showing a place where a plurality of such tape guide devices are consciously shifted in height to obtain an urging force in one direction in the plane of the tape 9.
FIG. 8a shows the state at normal temperature, and FIG. 8b shows the state at low temperature.

However, in the above-described configuration, the tape running adjustment is performed at room temperature, and even when the height of the tape guide portion is adjusted so that correct running can be obtained, the tape can be used in a low-temperature environment. When the tape is made of a resin film, the tape is hardened and the rigidity is increased, so that the biasing force becomes too large at the same difference in the height of the tape guide portion as at room temperature, so that the tape 9 has the lower guide flange as shown in the figure. Would be out of 3 '
The lower portion of the lower edge of the tape 9 is not only damaged significantly by the guide flange 3 ', but also has a problem in that correct tape running cannot be obtained and normal recording and reproduction cannot be performed. Further, such a problem becomes more remarkable as the miniaturization of the device advances and the distance between the various tape guides becomes shorter.

The present invention has been made in view of the above problems, and provides a tape guide device capable of changing a tape running position regulating state of a tape running position regulating member in response to a change in rigidity of a tape caused by a temperature change in a use environment of a device.

Means for Solving the Problems In order to solve the above problems, a tape guide device of the present invention includes a tape travel position regulating member that regulates a tape travel position, and a tape travel position regulating state of the tape travel position regulating member. It is provided with a configuration of a temperature-sensitive deformable member that changes according to the ambient temperature placed.

According to the present invention, not only the tape running height is regulated but also the tape running height is regulated in accordance with the increase in rigidity and rigidity of the tape at a low temperature. Reproduction will be obtained.

Hereinafter, a tape guide device according to an embodiment of the present invention will be described.
This will be described with reference to the drawings.

FIG. 1 shows a side view of a tape guide device according to a first embodiment of the present invention. FIG. 1 differs from FIG. 7 in that a temperature-sensitive deformable member 10 is inserted between the upper portions of the tape guides 1, 2, 3 and the head 5 of the height adjusting screw.
The same numbers are given to other common members.

With this configuration, when the tape running is adjusted at an arbitrary room temperature and used at another temperature, the upper and lower guide flanges 2, 3 for regulating the tape running height in accordance with the change in hardness and rigidity of the tape 9 are used. Changes up and down together with the tape guide surface 1, causing damage to the tape 9, the upper and lower guide flanges 2, 3
The tape can be prevented from falling off, etc., and a tape urging force that is almost the same as at normal temperature can be obtained, so that reliable recording and reproduction can be obtained.

FIG. 2 is a top view of the temperature-sensitive deformable member 10, and FIG. 3 is a side sectional view thereof. FIG. 4 is a side sectional view of the second embodiment relating to the temperature-sensitive deformable member, which is suitable when a large amount of deformation is required. FIG. 5 shows a third embodiment relating to a temperature-sensitive deformable member, which has a cylindrical shape. In addition, these temperature-sensitive deformable members are of a bimetal type in which dissimilar metals or the like are bonded together, or have a shape change that is gentle with respect to a temperature change of a shape memory alloy or a shape memory resin, and compared with other constituent members. Very large ones are suitable.

FIG. 6 is a graph showing an example of temperature versus shape change characteristics. The change characteristics are not limited to those that change linearly as shown in the figure, but change in an arbitrary shape in accordance with the change in tape characteristics. Good.

Although the embodiment has been described in which the tape guide surface and the upper and lower guide flanges are integrated and do not rotate, the upper and lower guide flanges are fixed, and the roller having the tape guide surface can rotate between them. Alternatively, the tape running height may be regulated by moving up and down to the side of the fixed guide cylinder.

In addition, the present invention is used not only for the tape running height, but also for a tapered guide pin. It is possible not to be affected by the characteristic change.

Effect of the Invention As described above, the present invention provides a tape traveling position regulating member that regulates the tape traveling position, and a temperature-sensitive deformation member that regulates the tape traveling position regulating state of the tape traveling position regulating member,
By automatically changing the tape in accordance with the ambient temperature, reliable tape running can be obtained over a wide temperature range. In addition, since there is no need to provide a tape running position detecting means, a heating means, and the like, and the configuration is extremely simple, it can be realized at low cost.

[Brief description of the drawings]

1 is a side view of a tape guide device according to an embodiment of the present invention, FIG. 2 is a top view of a temperature-sensitive deformable member, FIG. 3 is a sectional side view thereof, and FIG. FIG. 5 is a side sectional view of another embodiment of a temperature-sensitive deformable member, FIG. 6 is a graph showing the degeneration characteristics of the temperature-sensitive deformable member, and FIG. 7 is a conventional tape guide. Side view of the device,
FIG. 8 ab is a side view showing the operation state. 1,1 '... Tape guide surface, 2 ... Top guide flange, 3,3'
... lower guide flange, 4 ... height adjustment screw, 9 ... tape, 10, 11, 12 ... thermosensitive deformation member.

Claims (5)

(57) [Claims] A tape running position restricting member for restricting a tape running position, and a temperature-sensitive deformable member for changing a tape running position restricting state of the tape running position restricting member in accordance with an ambient temperature of a device. A tape guide device comprising: 2. The tape guide device according to claim 1, wherein the tape running position regulating member includes a tape running height regulating member for regulating a tape running height. 3. The tape guide device according to claim 1, wherein the tape traveling position regulating member regulates the tape traveling position by its inclination. 4. The tape according to claim 1, wherein the tape running position regulating member has at least one tape running height regulating flange and a cylindrical guide surface which is in sliding contact with the tape surface. Guide device. 5. A height-adjusting screw, a temperature-sensitive deformable member provided between a head of the adjusting screw and a tape traveling height regulating member through which the height adjusting screw passes, and a tape traveling height regulating member and the same. A tape guide device comprising: an elastic member provided on the opposite side sandwiching the support member; and a support portion to which a screw portion of the adjustment screw fits.