JPH05205441A - Tape cartridge - Google Patents

Abstract

PURPOSE:To simplify the mechanism of a tape deck by using a lamp port for providing an identification tool and providing the identification tool at a shared position as providing a detection optical path for detecting the starting and end part of a tape at an optimum position. CONSTITUTION:In a tape cartridge provided with the lamp port 11 and the identification tool for preventing an erroneous erasing 17, the identification tool 17 is arranged in a surplus space in the upper part of the lamp port 11. The identification tool 17 has an identification hole 21 at its rear surface and the tool 17 is supported freely rotatably and shiftingly to a main body case 1. With identification pin 30 entering in the lamp port 1 together with a flood- light pin 14, whether protection is applied or not is judged depending on a height where the pin 30 can enter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge provided with an identifying tool for indicating a cartridge state and a detection optical path for detecting a tape end.

[0002]

2. Description of the Related Art One example of a tape cartridge provided with the above-mentioned identification tool and detection optical path is for 8 mm video. There, a lamp insertion hole is provided in a triangular space surrounded by the left and right tape reels and the inner back wall of the tape loading pocket, and detection is performed between the lamp insertion hole and the optical path window opened on the left and right side walls of the main body case. The optical path is set. Furthermore, an identification tool for preventing accidental erasure is provided in the rear corner of the main body case,
By switching this to the left and right,
It shows a state in which recording of magnetic signals is permitted and a state in which recording is prohibited.

[0003]

For example, there is a video tape recorder system mainly for broadcasting business which digitizes and records all video signals and audio signals.
In this system, a plurality of types of tape cartridges having different case sizes are prepared according to the usage such as camera shooting and editing. Each large and small tape cartridge can be loaded as it is into one tape deck without using an adapter. Such a compatible tape cartridge is also provided with an identifying tool and a detection optical path, like the conventional tape cartridge.

As described above, when the tape cartridges having different case sizes are applied to the same tape deck, the arrangement of the identifying tool becomes a problem. For example, if the identification tool is provided at the same position as the current 8 mm video tape cartridge, that is, if the identification tool is provided in the rear corner of the case, a detection tool for determining the switching state is provided according to the size of the tape cartridge. Alternatively, it is necessary to move one detection tool corresponding to the case size, and in any case, it is inevitable that the internal structure of the tape deck becomes complicated.

As disclosed in Japanese Utility Model Laid-Open No. 62-18881, it is possible to arrange the identifying tool in a triangular space between the left and right tape reels. However, in that case, the detection optical path cannot be provided at the optimum position.
Particularly, in a small-sized tape cartridge, the detection optical path has to be largely shifted toward the tape loading pocket side, which makes it impossible to provide the lamp insertion hole inside the main body case. As described above, regarding the compatibility of tape cartridges, if the internal structure of the tape deck is attempted to be simplified, the arrangement and structure of the parts of the tape cartridge will be unreasonable. There was a problem in that the structure had to be complicated.

It is an object of the present invention to arrange the identifying tool by utilizing the lamp insertion hole so that the arrangement of parts and the case structure can be prevented and the internal structure of the tape deck can be simplified. To obtain a tape cartridge suitable for use in.

[0007]

According to the present invention, a main body case 1 is provided.
Is provided with a lamp insertion hole 11 and the optical path window 12 opened on the left and right side walls of the main body case 1 and the lamp insertion hole 11.
In the tape cartridge in which the detection optical path 13 for detecting the tape end is set between the and, a discriminating tool 17 showing the cartridge state is arranged above the lamp insertion hole 11, and the lamp is inserted together with the light projecting pin 14. Hole 11
At the entry position of the identification pin 30 that enters the identification tool 1
It is required that 7 is movably supported by the main body case 1 in a plurality of states including a state in which the identification pin 30 is prevented from entering upward. Specifically, the identification tool 17 is attached to the lamp insertion hole 1
It is rotatably fitted in the upper part of 1. Alternatively, it is assumed that the identification tool 17 is slidably supported in a direction traversing the lamp insertion hole 11. Further, a nodal mechanism 26 is provided between the identifying tool 17 and the main body case 1 to hold the identifying tool 17 in each displacement state.

[0008]

When the identifying tool 17 is provided by utilizing the lamp insertion hole 11, the light projecting pin 14 and the identifying pin 30 provided on the upper part thereof can be commonly used by large and small tape cartridges. Moreover, in the large and small tape cartridges, the identification tool 17 can be arranged without any problem while the detection optical path 13 is provided at the optimum position. The identifying tool 17 is displaced in a plurality of states to show a cartridge state, and the contents of the cartridge state can be determined by changing the entry height of the identification pin 30 according to the displaced state.

[0009]

According to the present invention, since the identifying tool 17 for indicating the cartridge state is provided on the upper part of the lamp insertion hole 11, the light projecting pin 14 which enters the lamp insertion hole 11 is provided.
And the identification pin 30 for determining the displacement state of the identifying tool 17 can be shared by large and small tape cartridges having different case sizes. For example, as compared with the case where the identifying tool 17 is provided in the rear corner of the case, the internal mechanism of the tape deck is Can be simplified.
Further, since the identification tool 17 is provided by utilizing the surplus space above the lamp insertion hole 11 while the detection optical path 13 is kept at the optimum position, the case structure is not unreasonable. Can be rationally arranged without.

When the present invention is applied to a non-compatible tape cartridge, in addition to the identifying tool 17 provided in the lamp insertion hole 11, for example, an identifying tool showing the cartridge state can be provided also in the rear corner of the case. It is also possible to show various cartridge states.

[0011]

【Example】

(First Embodiment) FIGS. 1 to 5 show the present invention in a commercial use of 8 mm
1 shows a first embodiment applied to a tape cartridge for video. This video system uses tape cartridges having different case sizes as recording media.
In FIG. 2, reference numeral 1 is a main body case formed by joining upper and lower plastic cases in a lid-fitting manner. On the left and right sides of the inside of the main body case 1, there are tape reels 3 on which the tape 2 is wound. The tape 2 pulled out from the one tape reel 3 to the front surface of the case is wound on the other tape reel 3 via the tape guides 5 and 5 provided with the tape outlets 4 and 4 on the left and right of the front surface of the case. On the front surface of the main body case 1, a tape loading pocket 6 is formed between the left and right tape outlets 4 and 4.

On the front surface of the main body case 1, there is provided a front lid 7 for protecting the tape which covers the front surface and the upper surface of the pocket 6 when not in use. The front lid 7 is attached to the main body case 1 via a shaft 8. It is pivoted to open and close freely. The front cover 7 is closed and biased by a spring (not shown) to rotate freely. A back lid 9 is provided inside the front lid 7 to protect the tape 2 from the back side, and the back lid 9 is interlocked with the upward opening rotation of the front lid 7 from the inside of the pocket 6 to the main body case. Retreat to the upper surface of 1.

In order to detect the start and end of the tape 2, a triangular space surrounded by the central portion in the longitudinal direction of the main body case 1, more specifically, the left and right tape reels 3 and the inner back wall 6a of the pocket 6. A lamp insertion hole 11 is provided in the lamp insertion hole 11, and a detection optical path 13 is provided between the lamp insertion hole 11 and an optical path window 12 opened on the left and right side walls of the body case 1. Detection optical path 1
3 is each tape reel 3.3 and the left and right tape guides 5
It is provided so as to cross the tape path between the tape and the tape. Reference numeral 14
Is a light emitting pin, and 15 is a light receiving end sensor, which are provided on the tape deck side.

In FIG. 3, the lamp insertion hole 11 is defined by cylindrical bosses 11a and 11b projecting from the upper and lower cases so as to face each other, and a light projecting window 16 is opened at the left and right of the joint portion of both bosses 11a and 11b. ing. By utilizing the surplus space above the lamp insertion hole 11, the identifying tool 17 showing the cartridge state is arranged.

The identifying tool 17 has a shaft portion 19 and an operating head 20 formed on the upper portion of the shaft portion 19, and an identifying hole 21 having a semicircular cross section is formed on one side of the lower end surface of the shaft portion 19. (See FIG. 4), the operation head 22 is provided with an operation groove 22 and an index indicating the operation position, which is a plastic molded product. In order to mount the identification tool 17, a shaft hole 24 that is continuous with the lamp insertion hole 11 is provided at the upper end of the lamp insertion hole 11, and a seat portion 25 that accommodates the entire operation head 20 is provided. Identification tool 17
The shaft portion 19 is rotatably supported with respect to the main body case 1 by fitting the shaft portion 19 into the shaft hole 24 from the upper surface side of the case, and the engaging portion 28 provided on the lower edge of the shaft portion 19 has the shaft hole 24.
By engaging with the peripheral edge of the opening, it is retained and held upward.

The identification tool 17 holds its position every half turn. For that purpose, a nodal mechanism 26 is provided between the sliding contact surfaces of the operation head 20 and the seat 25. This nodal mechanism 26 is
A protrusion 27 provided on two lower surfaces of the operation head 20 and two engaging recesses 29 provided on the seat portion 25 corresponding to the protrusion 27.
Consists of. As shown in FIG. 5, the protrusion 27 and the engagement recess 29 are formed at a phase interval of 180 ° in the circumferential direction. The protrusion 27 engages with the engagement recess 29 every half rotation to position the identification tool 17 and hold that state. At this time, every time the shaft portion 19 makes a half rotation, the position of the identification hole 21 moves to the left and right with the center of the shaft interposed therebetween, as shown in FIGS. 1 and 3.

In order to detect the state change of the identifying tool 17,
An identification pin 30 is provided on the upper end of the light projecting pin 14 in a protruding manner. The identification pin 30 is provided at an eccentric position deviated from the center of the light projecting pin 14, and the upper end of the identification pin 30 projects into the identification hole 21 and the upper end thereof contacts the lower end surface of the shaft portion 19. The state of the cartridge is determined by the difference from the state of FIG. 1 in which further upward entry is blocked, that is, the difference in the entry height of the identification pin 30. In this embodiment, the identification tool 17 is used to prevent erroneous erasure, which allows recording of a magnetic signal on the tape 2 only when the identification pin 30 is inserted into the identification hole 21.

The above description is of the small tape cartridge among the large and small tape cartridges used in the compatible form. However, the large tape cartridge has a case size and a tape length which are larger than those of the above tape cartridge. Is set to be large, and there is no great difference in case structure and component arrangement, and the configurations are substantially the same.
The thicknesses of the main body cases 1 of the large and small tape cartridges are the same.

According to the compatible type tape cartridge constructed as described above, since the identifying tool 17 is arranged by utilizing the extra space above the lamp insertion hole 11, even in a small tape cartridge having almost no extra space. With the detection optical path 13 set to the optimum position, the identification tool 17 can be arranged without difficulty. Furthermore, the identification pin 3 is attached to the projection pin 14.
Since 0 is provided and the state of the identifying tool 17 is determined by using the operation of the light projecting pin 14 entering the lamp insertion hole 11, it is possible to prevent the tape deck side mechanism from becoming complicated. The identification tool 17 can be easily switched from the top side of the case with a coin or a screwdriver.

(Second Embodiment) FIGS. 6 and 7 show the identification tool 1
7 shows a second embodiment of the present invention in which the shape of No. 7 and its supporting form are changed. In this case, the identification tool 17 is composed of a flat shutter plate 32 and an operation piece 33 projecting on one side of the plate surface, and between the cylindrical boss 11b extending from the lower case and the upper wall of the upper case. The shutter plate 32 is sandwiched and held only freely left and right slides. Further, between the shutter plate 32 and the inner surface of the upper wall, a nodal mechanism 26 including a protrusion 27 and an engaging recess 29 is provided, and the shutter plate 32 closes the lamp insertion hole 11 and opens the lamp insertion hole 11. The shutter plate 32 can be held in position in each state. The operation piece 33 can be operated from the upper surface side of the case through the operation window 34 opened on the upper wall. In this second embodiment, the identification pin 30
The cartridge state is determined by the difference between the state in which the shutter contacts the bottom surface of the shutter plate 32 and the state in which the upper end of the shutter plate 32 enters the operation window 34 side.

(Third Embodiment) The identifying tool 17 described in the first embodiment can be modified as shown in the third embodiment of FIG. Here, a flange portion 35 having a diameter larger than that of the shaft portion 19 which is fitted into the lamp insertion hole 11 is provided below the shaft portion 19, and an engaging portion 28 is provided above the shaft portion 19. That is, the identification tool 17
Is assembled from the side of the lamp insertion hole 11 so that the push-up force of the identification pin 30 acting on the identification tool 17 can be received by the upper case via the flange portion 35. An identification hole 21 is provided on the lower end surface of the flange portion 35.

(Another embodiment) The identifying tool 17 may be configured to swing along the inner surface of the upper wall to switch between a state where the lamp insertion hole 11 is closed and a state where the lamp insertion hole 11 is opened. The identifying tool 17 in the first and third embodiments may be composed of two members. Further, the cartridge state may be revealed by a state in which the identifying tool 17 is attached to the lamp insertion hole 11 and a state in which the identifying tool 17 is removed from the main body case 1. The identification tool 17 may be provided with a plurality of identification holes 21 having different depths so that the cartridge state can be divided into three or more states. The nodal mechanism 26 may be a member separate from the identifying tool 17 and the main body case 1.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a lamp insertion hole and an identification tool.

FIG. 2 is an internal plan view showing a schematic structure of a tape cartridge.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

5 is a cross-sectional view taken along the line CC in FIG.

FIG. 6 is a vertical sectional view showing a second embodiment in which the form of the identifying tool is changed.

FIG. 7 is a view on arrow D in FIG.

FIG. 8 is a vertical sectional view showing a third embodiment in which the form of the identifying tool is changed.

[Explanation of symbols]

 1 Main Body Case 2 Tape 11 Lamp Insertion Hole 12 Optical Path Window 13 Detection Optical Path 14 Light Emitting Pin 17 Identification Tool 26 Articulation Mechanism 30 Identification Pin

Front page continued (72) Inventor Nobuyuki Kaku 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Inside the Hitachi Media Visual Media Research Institute (72) Inventor Hidekazu Takeda 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Visual Media Research Center

Claims (4)

[Claims] 1. A main body case 1 is provided with a lamp insertion hole 11, and a detection optical path for detecting a tape end is provided between the lamp insertion hole 11 and an optical path window 12 opened on left and right side walls of the main body case 1. In the tape cartridge in which 13 is set, the identification tool 17 that indicates the cartridge state is arranged above the lamp insertion hole 11, and the entry position of the identification pin 30 that enters the lamp insertion hole 11 together with the light projecting pin 14. At the identification tool 17, the identification tool 17
The tape cartridge supported by the main body case 1 so as to be displaceable in a plurality of states including a state in which the upward entry of the tape cartridge is blocked. 2. The tape cartridge according to claim 1, wherein the identifying tool 17 is rotatably fitted in the upper portion of the lamp insertion hole 11. 3. The tape cartridge according to claim 1, wherein the identifying tool 17 is slidably supported in a direction traversing the lamp insertion hole 11. 4. A nodal mechanism 2 for holding the identifying tool 17 in each displacement state between the identifying tool 17 and the main body case 1.
6. The tape cartridge according to claim 1, wherein the tape cartridge 6 is provided.