JPH087579Y2 - Magnetic tape cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a magnetic tape cartridge, and more particularly to a magnetic tape cartridge provided with a security sensor for preventing the magnetic tape from being taken out from a computer control room, for example. Is.

(Prior Art) A magnetic tape of a computer often stores valuable information, and it is not preferable in terms of management that the magnetic tape be freely taken out from a storage place such as a computer control room.

Therefore, a surveillance system for theft prevention (for example,
57-24598), attach a tag-shaped element equipped with a sensor that reacts to a specific electromagnetic wave to a magnetic tape cartridge, and when this container passes a detection area generating a predetermined electromagnetic wave, the element A device has been proposed in which a detection device detects a sensor and sounds an alarm or the like to prevent the container from being taken out. (Actual No. 64-13594) (Problems to be solved by the device) The element of the sensor used in the above device (hereinafter referred to as a security sensor) is composed of a diode part and an antenna part, and is a sheet-like support layer. It is fixed and formed as a seal as a whole, and is attached to the inside of the casing of the magnetic medium with an adhesive layer. Since this type of security sensor should not be immediately visible from the outside for the purpose of preventing theft, it is usually provided inside the casing.

However, with such a configuration, when the case of the cartridge is opened, the security sensor attached to the inside can be confirmed, and it is possible to easily distinguish the security sensor with and without the security sensor. Therefore, there is a risk that only the items that are not attached may be stolen, and the purpose of preventing theft may not be thorough.

Further, in the above configuration, since the antenna part of the sensor is also housed inside the casing, the sensitivity may sometimes be insufficient and detection may not be possible. Further, the reel wound with the magnetic tape may come into contact with the sensor and damage the sensor.

Therefore, in the present invention, the existence of the device cannot be easily confirmed, and the purpose of theft prevention can be thoroughly achieved.
An object of the present invention is to provide a magnetic tape cartridge having high durability while maintaining high detection sensitivity and preventing the rotating reel of magnetic tape from coming into contact with the sensor.

(Means for Solving the Problems) A magnetic tape cartridge according to the present invention has a security sensor built in a clamp member for clamping a leader portion of a magnetic tape, and a part of an antenna of the security sensor is provided outside the clamp member. It is characterized by being exposed to.

Here, the clamp member means a columnar member used for clamping the leader portion of the magnetic tape into a leader block provided on the cartridge side in order to pull the leader portion of the magnetic tape into an external device such as a computer. It is a thing.

Further, a part of the antenna part of the security sensor is exposed to the outside of the clamp member not only when the intermediate portion in the length direction of the conductor-shaped antenna and the free end are exposed, This also includes the case where only the end face of the antenna end is exposed.

(Operation and effect) In the magnetic tape cartridge of the present invention, since the security sensor is built in the clamp member, it is not possible to easily confirm the presence thereof from the outside, and the anti-theft effect can be enhanced. it can. Further, since the security sensor is built in the clamp member, it is possible to prevent the reel of the rotating magnetic tape from coming into contact with the sensor and improve the durability of the sensor. Further, since a part of the antenna of the security sensor is exposed to the outside of the casing, the detection sensitivity can be kept high.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing a main part of the construction of a magnetic tape cartridge according to an embodiment of the present invention.

This is because the leader block 4 is detachably attached to the leader block mounting portion 2A at the corner of the casing of the cartridge 2, and the leader portion 6 of the magnetic tape is clamped to the clamp portion 8 of the leader block 4 by the clamp pin 10. It is a thing. Since this configuration itself is known, its detailed description is omitted.

The clamp pin 10 is a columnar member as shown in FIG. 2, and is formed in a cylindrical shape with a through hole 10A provided in the axial direction. Then, the security sensor 12 is inserted and fixed in the through hole 10A.

As shown in FIG. 2, the security sensor 12 includes a sensor main body 12B made of a diode and a pair of antenna portions 12A, 12A extending outward from both ends thereof. In the embodiment of FIG. 2, the sensor 12 extends axially in the through hole 10A of the clamp pin 10 and its length is made equal to that of the inside of the clamp pin 10 so that its antenna portion 12A is formed.
The end surface 12a of the end of the clamp pin 10 is exposed on both end surfaces of the clamp pin 10.

Therefore, according to this embodiment, the security sensor
Since 12 is built in the through hole 10A in the clamp pin 10, it cannot be seen from the outside, and its existence cannot be easily confirmed.

In the above embodiment, the security sensor 12 is inserted and fixed in the through hole of the clamp pin 10, but this may be integrally formed with the clamp pin 10. That is, as shown in FIG. 3, the clamp pin 10
It is also possible to embed the security sensor 12 in this and mold it integrally when molding the above. At this time, the antenna part of the security sensor 12
The end surface of 12A is exposed to the end surface of the clamp pin 10. In this way, the manufacturing is simple and can be manufactured at low cost.

As is apparent from the above embodiment, in the magnetic tape cartridge of the present invention, since the security sensor 12 is built in the clamp pin 10, it cannot be noticed from the outside, and its existence can be easily confirmed. Can not.

Further, in any of the above-described embodiments, it is possible to prevent the reel of the magnetic tape from coming into contact with the security sensor 12 and damaging the security sensor 12. Further, since a part of the antenna portion 12A of the security sensor 12 is exposed to the outside of the crankpin 10, the detection sensitivity can be increased.

[Brief description of drawings]

FIG. 1 is a partial perspective view showing a schematic structure of a magnetic tape cartridge according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a clamp pin used in a leader block of a magnetic tape cartridge of the present invention. FIG. 3 is a perspective view of a clamp pin according to another embodiment. 2 ... Magnetic cartridge 4 ... Leader block 6 ... Magnetic tape 8 ... Clamp part 10 ... Clamp pin 12 ... Security sensor 12A ... Sensor body 12B ... Antenna part

Claims (1)

[Scope of utility model registration request] 1. A magnetic tape cartridge containing a clamp member for clamping a leader portion of a magnetic tape, wherein a security sensor is built in the clamp member, and a part of an antenna of the security sensor is provided outside the clamp member. A magnetic tape cartridge characterized by being exposed.