JP2525219B2 - Tape cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a tape cartridge having a front lid on the front surface of a body case, and a gap formed between the body case and the front lid for protecting the tape. It is characterized by means for sealing as much as possible.

[Conventional technology]

In this type of tape cartridge, if dust enters from the outside and adheres to the tape when not in use, it may cause dropout or the like. Therefore, increasing hermeticity is a basic proposition.

In particular, a tape having a magnetic layer made of a metal material such as iron, cobalt, cobalt-nickel, and cobalt-phosphorus,
Specifically, in the case of vapor-deposited tape, the magnetic layer is corroded when it comes into contact with harmful suspended particles in the atmosphere, so more rigorous sealing performance is required.

According to the knowledge of the present inventor, in the illustrated tape cartridge, the above-mentioned tape corrosion is concentrated on the tape portion led out to the front of the main body case 1. Therefore, the present inventor has previously filed Japanese Patent Application No. 62-282768 in order to prevent corrosion of the tape portion passed between the front lid 9 and the back lid 16 by using both lid 9
・ Proposed to improve the hermeticity between 16 units.

[Problems to be Solved by the Invention]

However, by the subsequent trial experiment by the present inventor,
Tape corrosion is caused by the tape outlets 4 on the left and right of the front edge of the body case 1.
・ I knew that the same thing would happen to the tape portion facing 4. Particularly in the tape cartridge of the illustrated form, the tape portion facing the tape outlet 4 on the right side is severely corroded.

That is, FIG. 10 and FIG. 11 show around the tape outlet 4 on the right side in the conventional example, in which the lateral side wall 11 of the main body case 1 and the connecting piece 10 of the front lid 9 pivotally connected thereto.
As will be described later, a space 13 having a downward opening is formed in a considerably large size, and a gap G between the front end of the case side wall 11 and the inner wall surface 9a of the front lid 9 in the closed posture is also large. . Therefore, as shown by the arrow P in FIG. 10, the outside air easily enters the tape outlet 4 in the main body case 1 through the space 13 and the gap G, which promotes the corrosion of the tape portion facing the corresponding portion. I found out.

Further, at the front end position of the tape outlet 4, a projection wall 17 for restricting the tape lower movement limit, which will be described later, is provided so as to project from the case bottom wall 7, but the front lid 9 is a virtual line in FIG. As shown in, when it floats up due to backlash of the pivot,
There is a large gap G'between 17 and the inner wall surface 9a of the front lid 9,
It was also found that the tape outlet 4 in the main body case 1 being easily communicated with the outside air through the gap G ′ also causes a factor such as tape corrosion.

The present invention has been proposed in view of such circumstances, and achieves a hermetic seal between the tape outlet and the front lid on the main body case side, and prevents the tape portion facing the tape outlet from adhering dust or dust. The purpose is to effectively protect against corrosion.

[Means for solving the problem]

As a first solution means adopted by the present invention, a front lid 9 having a front end edge 20a in a closed posture is formed on a lateral side wall 11 of a main body case 1 which defines an outer wall of at least one tape outlet 4 in question. A sealing standing wall portion 20 is provided along with the inner wall surface 9a, and a vertical wall that overlaps the inner wall surface 9a of the front lid 9 with the inner wall surface 11a inside or outside the sealing standing wall portion 20 when the front lid 9 is in the closed posture. A direction sealing wall member 22 is provided.

As a second solving means adopted by the present invention, a vertical wall which overlaps the inner wall surface 9a of the front lid 9 with the standing wall surface 11a inside or outside the front end of the case side wall 11 when the front lid 9 is in the closed posture. Direction sealing wall member 22 is provided.

As a third solution means of the present invention, the inner wall surface 9a of the front lid 9 is
Similarly, when the front lid 9 is in the closed posture,
A sealing wall member (23) is provided that straddles the upper surface of the and goes inward.

These three types of wall members 20, 22, 23 can achieve the intended purpose by adopting one of them.
By selectively using two of them, and further by using all of them, further sealing performance can be achieved.

In the present invention, the vapor deposition tape in which corrosion is a problem is the main body case 1
It is particularly effective for the tape cartridge provided inside, but the one provided with a tape whose corrosion is not a particular problem is also targeted from the viewpoint of dust intrusion and adhesion.

[Action]

When the front lid 9 is closed and not in use, the front end edge 20a of the standing wall portion 20 provided on the lateral wall 11 of the case contacts or closely faces the inner surface of the front lid 9 substantially vertically. That is, the conventional gap G generated between the case side wall 11 and the front lid 9
Are filled with the standing wall portion 20.

When the front lid 9 is closed and not in use, the vertical wall member 22 provided on the inner wall surface 9a side of the front lid 9 is attached to at least one of the inside and outside (inside in the figure) of the lateral wall 11 of the case. Overlapping in contact or close proximity. In this case, even if a conventional gap G is formed between the case side wall 11 and the front lid 9, the wall member 22 covers the gap G.

Further, when the front lid 9 is closed and not in use, the wall member 23 provided at the lower end of the inner wall surface 9a of the front lid 9 straddles the upper surface of the projecting wall 17, so that the front lid 9 is rotated around the pivot 12. Even if the wall member 23 is lifted up, the wall member 23 will approach the upper portion of the projecting wall 17 rather than approaching it.

〔The invention's effect〕

According to the tape cartridge of claim 1, in the unused state in which the front lid 9 is closed, the front end edge 20a of the standing wall portion 20 provided on the side wall 11 side of the main body case 1 has the inner wall surface 9 of the front lid 9.
Along with a, the conventional gap G generated between the case side wall 11 and the front lid 9 is sealed up by the standing wall portion 20 almost vertically, so that the outside air is exposed to the case side wall 11
It blocks the tape from flowing into the tape outlet 4 in the case from the outside. Moreover, the inner wall surface 9a of the front lid 9 has a standing wall portion for sealing.
Since a vertical sealing wall member 22 that overlaps the inner or outer standing wall surface 11a of 20 is provided, a slight gap is provided between the front end edge 20a of the sealing standing wall portion 20 and the inner wall surface 9a of the front lid 9. Even when the above occurs, the inflow of the outside air can be blocked more reliably. Therefore, it is possible to prevent dust from invading and adhering to the tape portion facing the tape outlet 4 from the outside, and it is also possible to prevent the corresponding portion of the tape 2 from being corroded well.

According to the tape cartridge of claim (2), in the unused state in which the front lid 9 is closed, the vertical wall member 22 provided on the inner wall surface 9a side of the front lid 9 is inside or outside the case lateral side wall 11. Since the vertical wall surfaces 11a overlap with each other vertically in surface contact with each other, the wall member 22 covers the gap G almost vertically. Therefore, the outside air can be blocked from flowing into the tape outlet 4 in the case from the outside of the side wall 11 of the case, and the tape portion facing the tape outlet 4 can be effectively protected from dust adhesion and corrosion.

According to the tape cartridge of claim (3), in the unused state in which the front lid 9 is closed, the wall member 23 provided on the inner wall surface 9a side of the front lid 9 is located at the front end of the tape outlet 4 The tape 7 straddles the upper surface of the protruding wall 17 for restricting tape downward movement from the wall 7. Therefore, even if the front lid 9 rattles in an upwardly opened state around the pivot 12 and a large gap G ′ is formed between the inner wall surface 9a of the front lid 9 and the projecting wall 17, the wall member 23 is not covered by the projecting wall 17. Since it acts so as to approach the upper end of the tape and to close the gap G ', outside air is blocked from flowing into the tape outlet 4 in the case from the front, and the tape portion facing the tape outlet 4 is protected from dust. It can effectively protect against fouling and corrosion.

[First Embodiment] FIGS. 1 to 6 illustrate a first embodiment of a tape cartridge according to the present invention for an 8 mm video.

In FIGS. 2 to 4, reference numeral 1 denotes a main body case formed by abutting upper and lower cases 1a and 1b made of plastic,
Tape reels 3 on which magnetic tapes 2 made of vapor-deposited tape are wound are rotatably housed on the left and right sides of the inside of the main body case 1. The tape outlets 4 are provided at the left and right corners of the front end of the main body case 1.
4 is formed in a front opening shape, and a pocket 5 for pulling out the tape is formed in the center of the front surface of the main body case 1 so as to be recessed toward the inside of the case between the left and right tape outlets 4 and 4. There is. Tape path regulating pins 6 and 6 are integrally provided upright from the bottom wall 7 of the main body case 1 inside the pockets 5 at the left and right tape outlets 4 and 4, respectively.
The tape 2 is led out from one tape reel 3 to the front surface of the main body case 1 via 6 and wound around the other tape reel 3.

The main body case 1 has a front lid 9 for protecting the front side of the tape 2 stretched between the regulation pins 6 and 6 when not in use. The front lid 9 has a left-right length that closes the front surface of the main body case 1 across the left and right sides thereof, and the connecting pieces 10.10 connected to the rear from the left and right ends are lateral side walls 11.11 of the main body case 1. With the outer shaft fitted to each front end of
It is pivotally connected to open and close around 12 places.

In FIG. 3, a space opened downward between the right side tape lateral wall 11 and the connecting piece 10 of the front lid 9 connected to the right side wall 11.
13 is formed, and a spring member 15 is interposed on the pivot 12 by utilizing the space 13, and the spring member 15 constantly urges the front lid 9 to be in a closed posture.

A back lid 16 is attached to the back side of the front lid 9 at the location where the pocket 5 exists. The back cover 16 is opened / closed in conjunction with the opening / closing operation of the front cover 9. That is, when not in use, the front lid 9 in the closed posture covers the outside of the front surface of the tape 2,
The back cover 16 covers the inside including the lower side of the tape 2 and the opening upper surface side of the pocket 5.

When the tape cartridge is loaded in the deck, the front lid 9 is rotated upward and the back lid 16 is also rotated upward as shown in FIG. After that, the tape pull-out member on the deck side is relatively inserted into the pocket 5 from below, and the tape 2 is pulled out to the front outside of the main body case 1. With this, the tape 2 is separated from the tape path regulating pin 6. Drive in.

At the front end of each tape outlet 4, as shown in FIGS. 1 and 6, a case bottom wall 7 and a projecting wall 17 are provided so as to project from left to right, and the tape 2 has a lower limit of downward motion. It is restricted and it runs. It should be noted that the front lid 9 is cut out at the left and right lower end edges facing the projecting wall 17, and a member on the deck side is applied to the front end face 17a of the projecting wall 17 through the cutout portion 19,
The pushing limit of the tape cartridge to the deck is regulated. In the front lid 9 in the figure, the upper edge of the cutout portion 19 abuts the upper end surface 17b of the projecting wall 17 when the front lid 9 is in the closed position.

In FIGS. 1, 5, and 6, a front end edge 20a is formed at the front end portion (consisting of the upper and lower cases 1a and 1b) of the case side wall 11 that defines the outer wall of each tape outlet 4. A vertical wall portion 20 for sealing is formed as an integral extension along the inner wall surface 9a of the front lid 9 in the closed posture. In FIG. 1, the standing wall portion 20 is represented by stippling.

That is, as shown in FIG. 5, the front lid 9 is bent so that the outer surface of the upper portion 9b escapes to the rear side of the case while the lower half portion is almost vertical in the closed posture, and the front lid 9 is fully opened and turned upward.
The amount of upward protrusion of the front lid 9 is suppressed in the phantom line state in the figure. However, since the front lid 9 needs to have a uniform wall thickness in order to prevent sink marks during plastic molding, the inner surface portion of the upper portion 9b is also bent with a predetermined curvature R ₁ . The center of this curvature R ₁ is substantially based on the pivot 12 of the front lid 9, that is, the center of rotation. Therefore, according to the shape of the inner wall surface of the front lid 9, the lower edge of the front end edge 20a of the standing wall portion 20 is vertical, and the upper portion 20b is bent with a curvature R ₂ which substantially matches the curvature R ₁ . The front edge 20a and the inner wall surface 9a of the front lid are set to closely face each other with a very small gap. That is, the upper limit of the notch 19 is the upper limit of the protruding wall 17 as the limit of the rotation of the front lid 9 in the closing direction.
The contact was restricted by hitting the upper end surface 17b of the, and the dimensions were set so that the above-mentioned minimum gap was generated in this state. However,
The clearance has a design tolerance because the inner wall surface 9a of the front lid has a front edge 20 of the standing wall portion.
This is because it was set so as not to hit a first, and in reality, both 9a and 20a are in full contact.

Further, from the inner wall surface 9a of the front lid 9, when the front lid 9 is in the closed posture, the vertical vertical direction is vertically overlapped with the inner standing wall surface 11a of the front end portions of the left and right case lateral side walls 11, 11 in a plane contact state. The wall member 22 is integrally connected.

At this time, when the front lid 9 is closed and not in use, the conventional large gap G generated between the case lateral side wall 11 and the front lid inner wall surface 9a is first formed in the standing wall portion 20 on the case lateral side wall 11 side. Buried. Even if the molding accuracy of the front lid 9 is poor, the rattling of the pivot portion and the thermal deformation after molding are combined, a very small gap is generated between the front edge 20a of the standing wall portion 20 and the inner wall surface 9a of the front lid. ，
The inner surface thereof is closed by the wall member 22. Moreover, the wall member 22 is substantially in surface contact with the inner standing wall surface 11a of the case side wall 11. Therefore, the outer side of the side wall 11 of the case,
In particular, outside air can be surely prevented from flowing into the tape outlet 4 in the case via the space 13 on the right side. Since the wall member 22 is detached from the tape path regulating pin 6, it does not come into contact with and interfere with the tape 2.

Also, in the illustrated example, the standing wall portions 20 and 20
Although the respective 20 are provided, the standing wall portion 20 may be provided only on the right side wall 11 of the case where the space 13 exists. The same applies to the wall member 22.

Further, the front lid 9 has an inner wall surface 9a whose front end edge 20 of the standing wall portion 20.
It is possible to set the rotation limit in the closing direction to be abuttingly restricted prior to a.

Further, instead of integrally forming the standing wall portion 20 in front of the case lateral side wall 11, the standing wall portion 20 is made of a rubber member or the like which is separate from the main body case 1. It may be a retrofit in place. The wall member 22
Alternatively, it may be formed separately from the front lid 9 and attached to the front lid 9 afterwards.

[Second Embodiment] FIG. 7 shows a second embodiment of the tape cartridge according to the present invention. Here, the standing wall portion 20 is omitted, and the front end of the case lateral side wall 11 and the inner wall surface 9a of the front lid 9 are shown. A conventional gap G is left between the wall member 22 and the inner wall surface 9a.
Is provided. Even in this case, the inflow of outside air can be effectively blocked by increasing the adhesion between the wall member 22 and the standing wall surface 11a of the case side wall 11. The other structure is substantially the same as that of the first embodiment.

[Third Embodiment] FIGS. 8 and 9 show a third embodiment of the tape cartridge according to the present invention.

This is an inverted L-shape above the notch 19 in the inner wall surface 9a of the front lid 9 and straddling the upper ends of the left and right protruding walls 17 and turning inward when the front lid 9 is in the closed posture. The sealing wall member 23 is integrally extended over substantially the left and right sides of the projecting wall 17. In the closed state of the front lid 9, the wall member shown in the figure
23 has an inclined lower surface 23a extending inward. What is important here is that the lower surface 23a is located inside the inner side surface 17c of the projecting wall 17 in a state where the lower surface 23a does not contact and interfere with the upper inner corner edge of the projecting wall 17 when the front lid 9 is opened and closed.

When the front cover 9 is closed and is not in use, when the front cover 9 is slightly opened and pivoted about the pivot 12 due to backlash and external force of the pivot, as shown by the phantom line in FIG. A large gap G'is formed between the upper end of the cutout portion 19 and the upper end surface 17b of the protruding wall 17. However, the lower surface of the wall member 23
Since 23a always faces the inner corner of the upper end of the projecting wall 17 in close proximity to each other with a substantially constant small gap, the lower surface 23a blocks outside air from flowing into the tape outlet 4 in the case from the front side.

In the third embodiment, the lower surface 23a of the wall member 23 may extend horizontally and then downwardly in a vertical state.
Further, unlike the illustrated example, the lower surface 23a does not need to be in contact with the inner surface of the case bottom wall 7.

Further, it is not essential that the notch 19 is provided on the front lid 9 side, and the inner wall surface 9a of the front lid 9 may be in contact with the front end surface 17a of the projecting wall 17.

Further, the wall member 23 may be formed separately from the front lid 9 and attached to the front lid 9 afterwards.

[Brief description of drawings]

FIGS. 1 to 6 show a first embodiment of a tape cartridge according to the present invention. FIG. 1 is a cross-sectional plan view of essential parts, FIG. 2 is an overall external perspective view, and FIG. A partially cutaway plan view showing the structure, FIG. 4 is a vertical sectional side view taken along the line AA of FIG. 3, and FIG. 5 is a longitudinal sectional side view of a main part taken along the line BB in FIG. FIG. 6 is a perspective view of a main part. FIG. 7 is a vertical sectional side view corresponding to FIG. 5, showing a second embodiment of the tape cartridge according to the present invention. FIGS. 8 and 9 show a third embodiment of the tape cartridge according to the present invention. FIG. 8 is a vertical sectional side view corresponding to FIG. 5, and FIG. 9 is a partially cutaway perspective view of a main part. It is a figure. FIGS. 10 and 11 show a conventional tape cartridge, FIG. 10 is a plan view of a main portion, and FIG. 11 is a sectional view taken along the line CC in FIG. 1 ... Main body case, 2 ... Tape, 4 ... Tape outlet, 6 ... Tape path regulation pin, 7 ... Bottom wall of main body case, 9 ... Front lid, 9a ... Inner wall of front lid, 10 …… Connecting piece of front lid, 11 …… Side wall of main body case, 12 …… Axis of front lid, 13 …… Space, 17 …… Projection wall, 17a …… Front end surface of projection wall, 17b …… Protrusion Upper end face of wall, 17c …… Inside surface of protruding wall, 20 …… standing wall part, 20a …… front edge of standing wall part, 22 …… wall member, 23 …… wall member.

Claims (3)

(57) [Claims] 1. A tape cartridge having a front lid 9 on the front surface of a main body case 1, wherein a side wall 11 of the main body case 1 is fitted with a standing wall for sealing along an inner wall surface 9a of the front lid 9 in which a front end edge 20a is in a closed posture. And a vertical sealing wall member that is provided on the inner wall surface 9a of the front lid 9 and that overlaps the inner wall surface 11a inside or outside the sealing vertical wall portion 20 when the front lid 9 is in the closed posture. A tape cartridge characterized in that 22 is provided. 2. A tape cartridge having a front lid 9 on the front surface of a main body case 1, wherein an inner wall surface 9a of the front lid 9 has a front end portion of a side wall 11 of the main body case 1 when the front lid 9 is in a closed posture. Wall inside or outside
A tape cartridge, characterized in that a vertical sealing wall member (22) overlapping with (11a) is provided. 3. A front cover 9 is provided on the front surface of the main body case 1, and tape outlets 4, 4 for pulling out the built-in tape 2 to the outside of the front of the case are provided on the left and right of the front end of the main body case 1, respectively. At the outlet 4, tape 2 is attached to the front end of the bottom wall 7 of the main body case 1.
In a tape cartridge in which a projecting wall 17 that restricts the lower limit of the downward movement of the tape 2 when it is pulled out to the front of the case is provided over the left and right sides, the front wall of the inner wall 9a of the front lid 9 has A tape cartridge comprising a sealing wall member (23) which straddles the upper end surface of the projecting wall (17) and turns inward when the lid (9) is in the closed posture.