JPH0528612Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a tape cartridge used for recording or reproducing answering messages for answering machines, sounds for toys, and the like.

[Conventional technology]

Traditionally, magnetic tape in the form of cartridges or cassettes has been widely used as a medium for recording or reproducing audio, and today it is used to repeatedly record answering messages from answering machines, as described above.
Microtape cartridges, which are endless types of magnetic tape that can be played back, have come into widespread use.

This microtape cartridge has basically the same function as the old rear jet type 8-track tape cartridge, and can store endless magnetic tape wound on one reel.
The magnetic tape is pulled out from the innermost circumferential side, passed through a running system such as a magnetic head opposing portion and a pinch roller, and then wound again onto the outermost circumferential side of the wound magnetic tape. This operation is performed by sandwiching and feeding the magnetic tape between the pinch roller and a capstan on the recording/reproducing machine side,
Recording or playback can be performed repeatedly and continuously.

[Problem that the invention attempts to solve]

However, in such conventional microtape cartridges, when the amount of magnetic tape wound on the reel is small compared to the amount of magnetic tape fed out by rotation of the reel, the magnetic tape is transferred to the pinch roller and capstan on the magnetic tape feeding side. Slack. For this reason, the magnetic tape is folded in a relatively wide gap between the pinch roller on the magnetic tape sending side and the side wall of the cartridge case, and the magnetic tape wraps around the pinch roller and is cut or falls off the reel. There were problems such as winding becoming impossible. On the other hand, if the amount of magnetic tape fed out from the reel is larger than the amount of magnetic tape wound onto the reel, the magnetic tape may fall off the reel at the magnetic tape feeding section or protrude outside the insertion opening of the magnetic head. This caused the problem that the tape tension became unstable, making it impossible to obtain good recording and reproducing characteristics.

In addition, to prevent such slack in the magnetic tape, it is possible to disassemble the cartridge case and turn the reel by hand, but this makes the tape cartridge less user-friendly and not everyone can perform such disassembly and repair.

In addition, tape cartridges such as microtape cartridges are usually convenient to carry and are frequently transported, and at such times, the magnetic tape may become sagging due to vibration or impact. I am having a similar problem as above.

This invention was devised in view of these conventional problems, and aims to prevent the loosening of the magnetic tape, the accompanying instability of tape running, and the deterioration of recording and reproducing characteristics.

[Means for solving problems]

The tape cartridge according to this invention is provided with an arc-shaped tape sagging prevention wall that guides the magnetic tape between the pinch roller and the outer periphery of the pinch roller, and on the magnetic tape delivery side of the pinch roller.
A tape entrainment prevention guide is provided to peel off the magnetic tape from the pinch roller, and a tape fall prevention pin faces near the outermost periphery of the magnetic tape wound on the reel, and a cartridge case is positioned facing the outer periphery of the pinch roller. The structure includes an operating shaft insertion hole for inserting an operating shaft for tape winding.

[Effect]

Since the tape slack prevention wall in this invention is formed in an arc shape close to the pinch roller, even if the magnetic tape were to loosen on the magnetic tape sending side of the pinch roller, the magnetic tape Since there is no space where the magnetic tape overlaps and accumulates like seaweed, the magnetic tape runs smoothly between these spaces and is prevented from being bitten by the pinch roller. Further, the tape winding prevention guide is located in the vicinity of the pinch roller and acts to peel off from the pinch roller the magnetic tape that has adhered to the pinch roller and is about to be wound up. Furthermore, the tape dropout pin acts to correct the trajectory of the magnetic tape inward if it deviates outward by more than the normal amount from the outermost circumference of the magnetic tape wound on the reel, and inserts the magnetic tape through the insertion hole of the tape housing. By rotating the magnetic tape with the magnetic tape sandwiched between the pinch roller and the operating shaft, it is possible to correct loosening of the magnetic tape near the portion facing the magnetic head.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of the entire tape cartridge. In the figure, 1 is a tape housing made of plastic or the like, and 1a and 1b are a top case and a bottom case constituting the tape housing 1, and these are connected by screws 2.
3 is a magnetic tape; 4 is a reel that rotates around a reel rotating shaft 5 provided in the bottom case 1b; a flange 4b is integrally provided at the lower part of the hub 4a of this reel 4; An endless magnetic tape 3 is wound around the hub 4a so that the magnetic tape 3 is placed on the hub 4a. Reference numeral 6 denotes a pinch roller made of synthetic rubber such as neoprene, which is rotatably mounted around a shaft 11. 8 is screw 2
9a and 9b are reinforcing bosses protruding from the top case 1a and bottom case 1b, respectively, and 12 is a pad attached to the front surface of the holding plate 10. A magnetic head (not shown) is brought into contact. Reference numeral 13 denotes openings provided at corresponding portions of the top case 1a and the bottom case 1b, and the capstan of the recording/reproducing machine is inserted into and removed from the openings 13. Reference numeral 14 denotes a head facing portion which is the entry/exit portion of the magnetic head, and 15 a tape entrainment prevention guide, which is bent in the shape of a curve as a whole, and is provided on the magnetic tape delivery side of the pinch roller 6.
As shown in FIG. 2, the pinch roller has a tape guide flat surface 15b extending in the tangential direction and a knife-edge peeling tip 15a forming an acute angle with respect to the flat surface 15b. It should be noted that a minute gap is provided between the flat surface 15b and the inner surfaces of the side walls of the top case 1a and the bottom case 1b, in which the magnetic tape 3 can run. Reference numeral 16 denotes a tape sag prevention wall, which approaches the outer periphery of the pinch roller 6 and guides the magnetic tape 3 between it and the pinch roller 6. As shown in FIG. R is large and the center is the shaft 11 of the pinch roller 6
The top case 1a and the bottom case 1b are integrally provided at corresponding portions of the arc-shaped wall. In addition, this tape sag prevention wall 16 is a magnetic tape 3
The distance between the pinch roller 6 and the outer periphery of the pinch roller 6 gradually widens in the feeding direction.

Further, in the top case 1a, 17 is a tape fall prevention pin, as shown in FIGS. 3
It faces near the outermost circumference of the magnetic tape 3, and extends to about two-thirds of the width of the magnetic tape 3 from the top. Note that the diameter of this tape drop-off prevention pin 17 is desirably about 2 mm when the diameter of the reel 4 is, for example, 21 mm.

Further, reference numeral 18 denotes an operating shaft insertion hole bored in the top case 1a, and is provided at a position facing the outer periphery of the pinch roller 6, as shown in FIGS. 5 and 6. Note that as the operating shaft inserted into the operating shaft insertion hole 18, everyday items such as a matchstick shaft or a toothpick can also be used. 19 is a guide pole, and 20 is a tape support plate.

Then, the endless magnetic tape 3 is pulled out from the innermost side wound on the reel 4, and is placed on the tape support plate 20, on the outside of the guide pole 19, in front of the pad 12, on the outer periphery of the pinch roller 6, and on the outside of the guide pole 19. The magnetic tape 3 is wound onto the outermost side of the wound magnetic tape 3 by passing over the flat surface of the tape winding prevention guide 15.

Next, the operation will be explained.

First, a top case 1a as shown in FIG.
The bottom case 1b is connected with screws 2 to form a tape housing 1, which is set in a cartridge storage section provided in a recording/reproducing machine such as an answering machine. Then, the capstan of the recording/reproducing machine enters the opening 13 and comes into contact with the pinch roller 6 via the magnetic tape 3. At about the same time, the magnetic head of the recording/reproducing machine (usually used for both recording and reproduction) enters the head opposing section and presses the magnetic tape 3 against the pad 12.

In such a situation, the answering machine is activated,
When telephone reception begins, the capstan motor is driven. Therefore, the magnetic tape 3 being pinched by the capstan and the pinch roller 6 is
As shown in FIG. 1, the tape runs in the direction of arrow A, and the innermost one of the magnetic tapes 3 wound around the hub 4a of the reel 4 is pulled out and guided to the front of the magnetic head, and then The magnetic tapes that have passed through the pinch roller 6 are wound one after another onto the outermost side of the magnetic tape 3 wound on the hub 4a.

In such an endless running system for the magnetic tape 3, a tape winding prevention guide 15 is provided close to the magnetic tape sending side of the pinch roller 6, so that the magnetic tape 3 passing through the pinch roller 6 is Even if the magnetic tape 3 is bonded to the pinch roller 6 and is likely to be rolled up, the peeling tip forcibly peels off the bonded magnetic tape 3 and sends it out along a flat surface. Therefore, it is possible to reliably prevent the magnetic tape 3 from being caught in the pinch roller 6 while it is running.

Further, since the above-mentioned tape sag prevention wall 16 is provided near the pinch roller 6, the tape path between the two is narrowed, and a space is created for the magnetic tape 3 to accumulate.
Tape sagging prevention wall 1 from the outer periphery of the pinch roller 6
The magnetic tape 3 is smoothly sent out in the direction of the tape winding prevention guide 15 along the curved surface of the tape 6 without being bent or overlapping.

Further, since a tape drop-off pin 17 is provided on the inner surface of the top case 1a to protrude downward, the magnetic tape 3 wound around the hub 4a can be loosened due to slack in the magnetic tape 3 in the running system. It is restricted so that it does not extend outward beyond at least the area of the flange 4b. For example, the magnetic tape 3 that has come off the flange 4b and is pulled out from the innermost circumference is wound around the outermost circumference.
Prevent people from getting caught up in By doing so, it is possible to prevent the magnetic tape 3 from becoming unable to run or being cut.

In addition, the operating shaft insertion hole 18 provided in the top case 1a has a size that allows insertion of a shaft member such as a matchstick or toothpick in addition to the specially prepared operating shaft 24. In this inserted state, the operating shaft 24
By rotating the magnetic tape 3, the magnetic tape 3 sandwiched between the operating shaft 24 and the pinch roller 6 can be fed out by the required amount. For this reason, the pinch roller 6 removes the magnetic tape 3 that is slack in the running path from the guide pole 19 to the pinch roller 6, for example, the magnetic tape 3 that has protruded out of the case from the part facing the head.
This prevents the magnetic head from sagging and improves its contact with the magnetic head. As a result, it is possible to effectively suppress intermittent loss that causes deterioration of recording and reproducing characteristics, and stable characteristics can be obtained.

By stabilizing the running of the magnetic tape 3 in this way, stable operation of the tape cartridge as a sound generating device such as an answering machine or a toy is guaranteed, and reliability is further increased. It is.

[Effect of idea]

As described above, according to this invention, since the tape housing is provided with a wall to prevent tape sag, it is possible to reliably prevent the magnetic tape from overlapping in the case after passing through the pinch roller, and also to prevent the tape from being entangled. The guide can forcefully peel off the magnetic tape that is about to wrap around the pinch roller. Furthermore, the tape drop-off prevention pin prevents the magnetic tape from sagging and protruding out of the reel, and prevents the protruding magnetic tape from being wound directly onto the reel and being cut.
If slack occurs in the magnetic tape running system, insert the operating shaft into the operating shaft insertion hole and rotate it to send out the magnetic tape in the magnetic tape sending direction while rotating the pinch roller 6. This accumulation can be removed at any time to restore the desired tape tension in front of the magnetic head. In this way, it is possible to obtain the effect that good recording and reproducing characteristics due to stable running of the magnetic tape can be ensured over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the tape cartridge according to the invention, FIG. 2 is a plan view showing a tape entrainment prevention guide, FIG. 3 is a plan view showing a tape sagging prevention wall, and FIG. The figure is a plan view showing the relationship between the tape fall prevention pin and the wound magnetic tape, Figure 5 is a front view showing the state in which the operating shaft is in pressure contact with the magnetic tape against the pinch roller, and Figure 6 is the operating shaft. It is a perspective view showing a tape housing with an insertion hole. 1...Tape housing, 3...Magnetic tape,
4... Reel, 6... Pinch roller, 15... Tape entrainment prevention guide, 16... Tape sagging prevention wall, 17... Tape fall prevention pin, 18... Operation shaft insertion hole.

Claims (1)

[Claims for Utility Model Registration] (1) An endless magnetic tape wound on one reel is pulled out from the innermost circumferential side and passed through a magnetic head opposing part and a running system such as a pinch roller,
In the tape cartridge that winds the wound magnetic tape again to the outermost circumference side, an arcuate tape sag prevention wall that approaches the outer circumference of the pinch roller and guides the magnetic tape is provided between the tape cartridge and the pinch roller. a tape entrainment prevention guide provided on the magnetic tape sending side of the roller and peeling the fed magnetic tape from the pinch roller;
A tape fall prevention pin facing near the outermost periphery of the magnetic tape wound on the reel, and an operating shaft provided in the tape housing facing the outer periphery of the pinch roller for inserting an operating shaft for tape winding. A tape cartridge characterized by having an insertion hole. (2) The tape according to claim 1, wherein the tape sag prevention wall is formed such that the gap between the tape sag prevention wall and the outer periphery of the pinch roller gradually widens in the direction in which the magnetic tape is sent out. Cartridge. (3) The tape entrainment prevention guide is provided on the magnetic tape sending side of the pinch roller, and includes a flat surface for the tape guide extending in the tangential direction of the pinch roller, and a peeling tip that forms an acute angle with the flat surface. 1. A tape cartridge according to claim 1, characterized in that: (4) The tape cartridge according to claim 1, wherein the tape sagging prevention wall, the tape entrainment prevention guide, and the tape fall prevention pin are integrally provided in the tape housing.