JPH01204258A - Tape guide device - Google Patents

Abstract

PURPOSE:To obtain a reliable tape travel over a wide temperature range by providing a tape traveling position regulating member and a thermosensitive deformable member for regulating the tape traveling position regulating state of the tape traveling position regulating member. CONSTITUTION:The thermosensitive deformable member 10 is inserted into between the top of tape guide parts 1-3 and a height adjusting screw head part 5. By this constitution, a tape travel adjustment is performed under and optional room temperature, and when the device concerned is used under a different temperature, top and bottom guide flanges 2 and 3 for regulating the tape traveling height according to variations of a tape 9 in hardness and rigidity is displaced up and down together with a tape guide surface 1, thus preventing the tape 9 from being damaged and also from slipping out of the top and bottom guide flanges 2 and 3, etc. By this method, the correct tape travel can be performed, and hence the correct recording and reproducing can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape guide device used in a rotary head type digital audio tape recorder or the like.

2. Description of the Related Art In recent years, tape guide devices have been required to have higher performance as rotary head type digital audio tape recorders and the like have been put into practical use.

The conventional tape guide device described above will be described below 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, and the tape surface slides on the tape as it runs. 2 regulates the upper edge position of the tape with the upper guide 7 lunge. 3 is a lower guide flange that regulates the lower edge position of the tape. 4 is a height adjustment screw, 5 is the head of the height adjustment screw, 6 is a support portion into which the threaded portion of the height adjustment screw is screwed together, and tape guide surface 1. The vertical guide 7 enables fine adjustment of the vertical height of the flange 2, 3. 7 is a mounting part for the chassis, etc., 8 is a return spring that connects the tape guide surface, and the upper and lower guide flanges (hereinafter referred to as tape guide parts) to the height adjustment screw 4.
It is energized toward the head 5 of. 9 is a tape.

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

FIG. 8 is a side view showing a place in which a plurality of such tape guide devices are used with their heights intentionally shifted to obtain a force applied to the tape 9 in one direction within its plane.
Figure a shows the state at normal temperature, and Figure 8b shows the state at low temperature.

Problems to be Solved by the Invention However, with the above configuration, at room temperature,
Even if you adjust the tape running and adjust the height of the tape guide to ensure correct running, the tape made of resin film will harden and become more rigid when used in a low-temperature environment. If the difference in height of the tape guide section is the same as at room temperature, the biasing force will be too large, and the tape 9 will come off the lower guide flange 3' as shown in the figure, or the lower edge of the tape 9 will be pushed away from the lower guide 7 flange. 3' causes a problem in that proper tape running cannot be obtained without being severely damaged, and normal recording and reproduction cannot be performed. Moreover, such problems become more prominent as devices become smaller and the distances between various tape guides become shorter.

In view of the above problems, the present invention provides a tape guide device that can change the tape running position regulation state of a tape running position regulating member in response to changes in the rigidity of the tape due to temperature changes.

Means for Solving the Problems In order to solve the above problems, the tape guide device of the present invention includes a tape running position regulating member that regulates the tape running position, and a sense that regulates the tape running position regulating state of the tape running position regulating member. It is equipped with a structure called a temperature deformable member.

Function: With the above-described structure, the present invention changes the regulation state of the tape running height in response to the hardening of the tape at low temperatures and the increase in rigidity, thereby not only preventing damage to the tape but also ensuring correct tape running and therefore correct recording. This results in regeneration.

EXAMPLE Hereinafter, a tape guide device according to an example of the present invention 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. 1 differs from FIG. 7 in that a temperature-sensitive deformable member 10 is inserted between the upper part of the tape guide portions 1, 2.3 and the height adjustment screw head 5. Other common members are given the same numbers.

With this configuration, when adjusting the tape run at any room temperature and using it at a different temperature, the hardness of the tape 9,
The upper and lower guide flanges 2 and 3 that regulate the tape running height in response to changes in rigidity may displace up and down together with the tape guide surface 1, causing damage to the tape 9 and causing damage to the upper and lower guide flanges 2 and 3.
This prevents the tape from falling off, etc., and provides a tape pressing force that is almost the same as at room temperature, resulting in reliable recording and playback.

FIG. 2 is a top view of the temperature-sensitive deformable member 1o, and FIG. 3 is a side sectional view thereof. FIG. 4 is a side sectional view of a second embodiment of the temperature-sensitive deformable member, which is suitable when a large amount of deformation is required. FIG. 5 shows a third embodiment of the temperature-sensitive deformable member, which has a cylindrical shape. These temperature-sensitive deformable materials include bimetallic materials made by laminating dissimilar metals, etc.
Alternatively, a material such as a shape memory alloy or a shape memory resin whose shape changes slowly with temperature changes and which is significantly larger than other constituent members is suitable.

Figure 6 is a graph showing an example of temperature vs. shape change characteristics, and the change characteristics are not limited to those that change linearly as shown in the figure, but also those that change in an arbitrary shape in accordance with changes in the characteristics of the tape. That's fine.

In the embodiment, the tape guide surface and the upper and lower guide flanges are integrated and do not rotate, but the upper and lower guide flanges are fixed, and the roller with the tape guide surface can rotate between them. Alternatively, the tape running height may be regulated by moving up and down on the side of a fixed guide cylinder.

In addition, the present invention does not only control the tape running height, but also uses inclined guide pins to regulate the tape running position by regulating the degree of inclination. It can be made unaffected by change.

Effects of the Invention As described above, the present invention provides a tape running position regulating member that regulates the tape running position, and a temperature-sensitive deformable member that regulates the tape running position regulating state of the tape running position regulating member, so that the tape running position can be controlled over a wide temperature range. Reliable tape running can be obtained throughout. Furthermore, since the configuration is extremely simple, it can be realized at low cost.

[Brief explanation of the drawing]

FIG. 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 the temperature-sensitive deformable member, FIG. 3 is a side sectional view thereof, and FIG. 4 is another view of the temperature-sensitive deformable member. FIG. 5 is a side sectional view of an embodiment of another temperature-sensitive deformable member, FIG. 6 is a graph showing the deformation characteristics of the temperature-sensitive deformable member, and FIG. 7 is a conventional tape guide. side view of the device,
FIG. 8ab is a side view showing its operating state. 1.1'...Tape guide surface, 2...Upper guide 7 runci, 3,3'...Lower guide flange, 4...
・Height adjustment, 9 ・Tape, 10, 11.12・
... - Temperature-sensitive deformable member. Name of agent: Patent attorney Toshio Nakao and one other person
0tsu faction (J) ψ
Child line faction

Claims (5)

[Claims] (1) A tape guide device comprising: a tape running position regulating member that regulates the tape running position; and a temperature-sensitive deformable member that regulates the tape running position regulating state of the tape running position regulating member. (2) The tape guide device according to claim 1, wherein the tape running position regulating member includes a tape running height regulating member that regulates the tape running height. (3) The tape guide device according to claim 1, wherein the tape running position regulating member regulates the tape running position depending on the degree of inclination of the tape running position regulating member. (4) The tape guide according to claim 1, wherein the tape running position regulating member includes at least one tape running height regulating flange and a cylindrical guide surface that makes sliding contact with the tape surface. Device. (5) A temperature-sensitive deformable member provided between the height adjustment screw, the head of the adjustment screw, and the tape running height regulating member through which the height adjusting screw passes, and this and the tape running height regulating member. A tape guide device comprising: an elastic member provided on the opposite side of the sandwich; and a support portion into which a threaded portion of an adjustment screw is fitted.