JPH0823980B2 - Tape car ledge - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cartridge having a front lid with a back lid on the front surface of a main body case, and the back lid when the front lid and the back lid are in a closed posture. It is an improvement of the means for preventing the floating backlash.

[Conventional technology]

FIG. 6 shows a conventional example of a tape cartridge targeted by the present invention. For example, it is disclosed in Japanese Utility Model Laid-Open No. 58-173086. There, the back cover 13 is attached to the bearing 17 on the front cover 5 side as a rotary shaft.
It is pivotally connected at 16, and opens and closes in conjunction with the opening and closing of the front lid 5. That is, when the front lid 5 is in the closed posture, the back lid 13 is
In the closed state shown by the solid line in the figure, when the front lid 5 pivotally connected to the main body case 1 side pivots upward around the pivot 8, the back lid 13
While rotating around the rotary shaft 16, the guide shaft 18 on the back cover 13 side slides upward along the guide groove 19 on the main body case 1 side, and finally both the front cover 5 and the back cover 13 move to the first position. As shown by the phantom line in FIG. 6, the posture is such that it opens upward. The movement of the back cover 13 is restricted by the guide sliding due to the fitting between the guide shaft 18 and the guide groove 19 on the main body case 1 side, and the back cover 13 opens and closes in conjunction with the front cover 5.

[Problems to be solved by the invention]

In such a conventional embodiment, as shown in FIG. 7, the rear end portion 15a of the upper wall 15 of the back cover 13 is lifted by a predetermined amount Y and protrudes from the upper surface 1c of the body case 1.

This floating phenomenon is caused by the imbalance between the weight of the portion of the back cover 13 located above the rotary shaft 16 and the weight of the portion located below the same. That is, as shown in FIG.
The back cover 13 has an inclined wall 14 and an inclined wall 14 having almost the same thickness.
The upper wall 15 and the upper wall 15 that are continuously provided in a substantially orthogonal state on the upper end of the are formed in a substantially T shape. The rotary shaft 16 is provided so as to project at a position slightly lower than the intermediate portion in the up-down direction at the left and right ends of the inclined wall 14. The guide shaft 18 is provided below the position where the right and left ends of the inclined wall 14 protrude from the rotary shaft. Therefore, the weight of the portion located on the upper side of the rotary shaft 16 is larger than the weight of the portion located on the lower side.

Therefore, when the tape cartridge is loaded into the player with the case front side facing down, the rear end portion 15a of the upper wall 15 is lifted up from the upper surface 1c of the main body case 1 on the back cover 13 due to the imbalance of the weight described above. A moment M in the direction to make it occur is generated.

On the other hand, as shown in FIG. 6, between the shaft diameter D of the guide shaft 18 and the groove width x of the guide groove 19, a predetermined value is provided for smoothly rotating the back cover 13 between the open position and the closed position. Clearance is required. Further, in such a conventional embodiment, the completion of the closing posture of the front lid 5 and the completion of the closing posture of the back lid 13 are performed at the same time, so that in the closing postures of both, the back lid 13 is not acted upon by an external force for closing it. Therefore, the back cover 13 floats up until the guide shaft 18 moves upward in the guide groove 19 around the rotary shaft 16 and hits the rear guide surface 19a of the guide groove 19.

When such a lifting phenomenon occurs, the rear end portion 15a of the back cover 13 that protrudes from the case upper surface 1c when the tape cartridge is taken out is a component on the deck side (mainly the pressing of the tape cartridge depending on the lifting amount Y and the internal structure of the player). This causes the worst situation in which the tape cartridge cannot be taken out from the player by hitting the (member) and further biting it. Even if it does not reach that far, the tape cartridge cannot be smoothly attached to and detached from the player due to the contact interference between the back cover 13 and the member on the player side, or both are damaged. Due to this lifting, a gap g is formed between the lower end 14a of the inclined wall 14 and the lower end inner surface 5a of the front lid 5, and dust enters through the gap g and adheres to the tape 2 even when not in use.

[Object of the Invention]

From this point of view, the present invention follows the conventional form as much as possible, and the rear end portion of the upper wall 15 of the back cover 13 when the back cover 13 is in the closed posture, without the design of the guide shaft 18 and the guide groove 19 being greatly changed. An object of the present invention is to provide a tape cartridge capable of suppressing the phenomenon that 15a floats as much as possible.

[Means for solving problems]

 Description will be given from the background of completing the present invention.

First of all, as shown in FIG. 1, the distance between the upper wall 15 of the back cover 13 and the rotating shaft 16 is made shorter than that of the conventional embodiment, and the upper surface of the upper wall 15 is closer to the upper surface 1c of the main body case 1 in the closed posture. And the upper wall 15 is tilted rearward at a predetermined tilt angle θ, and its rear end 15a is provided on the main body case 1 side. The surface 1d receives and supports it. This configuration itself is effective in reducing the above-mentioned lift amount Y. However,
Since the amount of lifting Y is large only by this, the rear end portion 15a of the upper wall 15 cannot be completely lifted from the upper surface 1c of the main body case 1.

Further, in addition to the first structure, the pitch distance l'in the rotation direction between the axis of the guide shaft 18 and the axis of the rotary shaft 16 which rotate around the rotary shaft 16 in the guide groove 19 is defined by the following formula. It is assumed that it has been set (see FIG. 2).

l '> l + a where l is the pitch distance in the conventional embodiment shown in FIG. 6, and a is the rotation amount of the guide shaft 18 in the guide groove 19 in the rotation direction.

Now, it is assumed that the shape and groove length of the guide groove 19 are set to be the same as those of the conventional embodiment by satisfying the above equation. When the front lid 5 and the back lid 13 are closed from the upper open state, the guide shaft 18 is guided by the guide groove 19
It contacts the rear guide surface 19a and moves downward faster than the conventional example. Therefore, before the front lid 5 is completely closed,
13 rapidly rotates around the rotary shaft 16 in the clockwise direction in the figure, and the rear end portion 15a of the back cover upper wall 15 is received by the upper wall receiving surface 1d. From this state, the front lid 5 is still closed. That is, the time required for the back lid 13 to shift from the open posture to the closed posture can be shortened, so that the closing posture of the back lid 13 can be completed prior to that of the front lid 5. Then, when the front lid 5 is completely closed, a force F is applied to the upper wall 15 of the back lid 13 to push it toward the upper wall receiving surface 1d. In addition, when the front lid 5 and the back lid 13 are completely closed,
Even if the guide shaft 18 tries to rotate upward in the guide groove 19 around the rotary shaft 16, the guide shaft 18 hits the rear guide surface 19a of the guide groove 19 and its movement is restricted. From this point as well
Uplift of 15 is regulated. When the front lid 5 rotates upward and upward, the rotary shaft 16 moves upward and upward, so that the guide shaft 18 slides in the guide groove 19 without hindrance.

The present invention has been completed based on this idea.

That is, according to the present invention, the front cover 5 is attached to the main body case 1 so as to be pivotable so as to open and close, and covers the outer surface side of the tape 2 drawn out to the front surface of the main body case 1, and on the back side of the front cover 5 around the rotary shaft 16. A back cover 13 which is pivotally attached to cover the back side of the tape 2;
It is assumed that the tape cartridge includes means for opening and closing the back cover 13 in conjunction with opening and closing of the front cover 5. More specifically, a guide groove 19 is formed on at least one of the left and right side surfaces of the tape loading pocket 12 formed on the front surface of the main body case 1, and the guide groove 18 extending from the back cover 13 is formed on the guide groove 19. The rear cover 13 is opened and closed by interlocking with the opening and closing of the front cover 5.

In addition, the present invention is configured such that the rear end portion 15a of the upper wall 15 of the back lid 13 is received and supported by the upper wall receiving surface 1d of the main body case 1 before the front lid 5 is in the completely closed posture. It is a thing. In other words, the back cover 13 before the front cover 5 is completely closed.
Is already in a closed position. Therefore, the front lid 5
When the upper wall 15 is completely closed, the upper wall 15 of the back cover 13 is pressed against the upper wall receiving surface 1d with a closing force F, and lifting of the upper wall 15 is restricted.

Specifically, as shown in FIG. 2, the guide shaft 18 and the guide groove 19 are set to have the same specifications as those of the conventional example, and the radius of rotation r'of the guide shaft 18 with respect to the axis of the rotary shaft 16 is set to the conventional reference. Can be achieved by increasing the peripheral speed of the guide groove 18 by increasing the radius of rotation r.

More preferably, when the back cover 13 is in the closed posture, the upper surface of the upper wall 15 of the back cover 13 is sunk below the upper surface 1c of the main body case 1, and the upper wall 15 is tilted backward and in the main body case. It shall be received and supported by the upper wall receiving surface 1d on the 1st side.

〔The invention's effect〕

According to the present invention as described above, the back cover 13 is opened and closed by interlocking with the front cover 5 by the linking means. However, the rear end portion 15a of the upper wall 15 of the back lid 13 is received by the upper wall receiving surface 1d of the main body case 1 and is in the closed posture before the front lid 5 is in the completely closed posture. Therefore, when the front lid 5 is completely closed, the back lid 13 receives the closing force F and is pressed against the upper wall receiving surface 1d, and the lifting phenomenon of the back lid 13 can be well prevented.

Moreover, when the back cover 13 is in the closed posture, the back cover 13
The upper surface of the upper wall 15 of 13 is sunk below the upper surface 1c of the main body case 1, and the upper wall 15 is received and supported by the upper wall receiving surface 1d on the main body case 1 side in a downwardly inclined rearward posture. According to the preferred embodiment of the present invention, the moment M itself in the direction in which the upper wall 15 projects above the main body case 1 as compared with the conventional example in which the height of the upper wall 15 is the same as the upper surface 1c of the main body case 1. Can be reduced. Also, the front lid for the main body case 1
Even if there is looseness in assembling the back lid 13 with respect to the front lid 5 and the back lid 5, the rear end portion 15a of the upper wall 15 is more safely guaranteed to float above the main body case 1.

Furthermore, a linking means for opening and closing the back cover 13 in conjunction with opening and closing of the front cover 5 is a guide shaft that is continuously extended from the guide groove 19 on the main body case 1 side and the back cover 13 and is fitted into the guide groove 19. In the present invention consisting of 18, the guide shaft 18 with respect to the axis of the rotary shaft 16
When a specific configuration is adopted in which the rotation radius r'of the guide shaft is set larger than that of the conventional embodiment, the peripheral speed of the guide shaft 18 near the closing end of the back cover 13 can be increased, and the guide shaft in the guide groove 19 can be increased. 18 has the advantage that the slidability can be improved. In addition, the guide shaft 18 and the guide groove 19 are substantially as in the conventional case, and there is an advantage that the intended purpose can be achieved without a large design change.

〔Example〕

 1 to 5 show a first embodiment of the present invention.

In FIGS. 4 and 5, reference numeral 1 is a main body case.
The main body case 1 is formed by connecting upper and lower plastic cases 1a and 1b to each other in a lid-fitting manner with screws or the like. The main body case 1 has tape reels 3 on which the tape 2 is wound on the left and right sides. Tape outlets 4, 4 are formed in a front opening on the left and right of the front surface of the body case 1. The tape 2 is led out from one reel 3 to the front surface of the case through the tape outlets 4 and is wound around the other reel 3.

A front cover 5 for closing the front surface of the main body case 1 is pivotally mounted so as to be opened and closed.

The front lid 5 includes a front wall 6 that closes the front surface of the main body case 1 across the left and right, left and right side pieces 7 and 7 that extend rearward from the left and right ends of the front wall 6, and both left and right side pieces 7 and 7. Is a plastic molded product having a pivotal joint 8.8 protruding from the inner surface of the main body 1, and the left and right side strips 7 and 7 are fitted to the outsides of the front ends of the left and right side walls 9 and 9 of the main body case 1. 8 is pivotally attached by being fitted in shaft holes 10 provided in the left and right side walls 9 respectively. As a result, the front lid 5 is rotated around the pivot 8 between the posture in which the front surface of the main body case 1 is closed and the posture in which the front is opened, and the spring member 11 formed of a torsion coil spring is mounted on the pivot shaft 8 on the right side in FIG. It is closed and closed and is biased to rotate freely.

When the tape cartridge is not in use, the front lid 5 is closed, covers the outer surface of the tape 2 to protect it, and when the tape cartridge is loaded into the player, the front lid 5 opens upward and the tape 2 can be pulled out to the front of the case. It will be in a standby state.

A tape loading pocket 12 is formed on the front surface of the main body case 1 so as to be recessed. This pocket
A back cover 13 is attached to the inside of the front cover 5 at the location where 12 exists. The back cover 13 covers the back side of the tape 2, that is, the inner side including the lower side and the opening upper surface side of the pocket 12 when not in use, and dust enters from the upper and lower opening surface sides of the pocket 12 and adheres to the tape 2. Prevent from doing.

In FIG. 1, the back cover 13 has a cross section having an inclined wall 14 that covers the back surface side of the tape 2 and an upper wall 15 that is connected to the upper end of the inclined wall 14 at right angles and closes the opening upper surface of the pocket 12. About T
It is a letter-shaped plastic molded product.

The back cover 13 has a rotating shaft 16 protruding from the left and right ends of the inclined wall 14.
16 are pivotally connected to left and right bearings 17, 17 provided on the inner surface side of the front lid 5, respectively, and the guide shafts 18 from the position below the rotary shafts 16, 16 at the left and right ends of the inclined wall 14. The guide shafts 18 and 18 are slidably fitted in the guide grooves 19 and 19 of substantially S-shape provided on the inner surfaces of the left and right side walls of the pocket 12 facing each other. The back cover 13 is opened and closed in conjunction with the opening and closing of the front cover 5 by the linking means including the guide shaft 18 and the guide groove 19.

Upper wall receiving surfaces 1d are formed on the left and right side walls of the pocket 12 on the main body case 1 side, and when the back cover 13 is in the closed posture,
The rear end portion 15a of the upper wall 15 is received and supported by the receiving surface 1d. In this receiving state, that is, in the closed state of the back cover 13, the entire upper surface of the upper wall 15 is submerged from the upper surface 1c of the main body case 1, and the entire upper wall 15 is in a rearward downward inclined posture by a constant angle θ. The lower end 14a of the inclined wall 14 closely faces the lower end inner surface 5a of the front lid 5.

Thus, the guide shaft 18, the guide groove 19 and the fitting clearance between them are set to be the same as those of the conventional example shown in FIG. However, the pitch distance in the rotation direction between the axis of the guide shaft 18 and the axis of the rotary shaft 16 is l ′, that of the above-mentioned conventional example is l, and the rotation direction of the guide shaft 18 in the guide groove 19 in the conventional example is It is assumed that there is a relation of l '> l + a, where a is the amount of rotation at. That is, as a conclusion, the radius of rotation r'of the guide shaft 18 with respect to the axis of the rotary shaft 16 is set to be larger than the radius of rotation r, which is the conventional reference.

At that time, paying attention to the movement of the front lid 5 and the back lid 13 immediately before the completion of the closing posture, the solid line in FIG. 3 shows the case of the embodiment of the present invention, and the phantom line shows the case of the conventional example. Before the front lid 5 is closed, the peripheral speed of the guide shaft 18 is higher than that of the conventional example, and therefore the front lid 13 changes its position around the rotary shaft 116 faster than the conventional example with respect to time. As a result, the front lid 5 is closed immediately before it is completely closed.
The upper wall 15 of the upper wall 15 has a rear end portion 15a which is received in an inclined posture on the upper wall receiving surface 1d in a closed posture. From this state, the front lid 5 further receives the spring force of the spring member 11 and closes, and the rotary shaft 16 slightly moves downward. As a result, a force F is generated in the direction in which the upper wall 15 of the back lid 13 is pressed against the upper wall receiving surface 1d, and this force F overcomes the moment M and suppresses the lifting of the back lid 13.

When the front lid 5 and the back lid 13 are closed, the guide shaft
Although there is a possibility that 18 can move further downward in the guide groove 19, since the upper wall 5 of the back cover 13 is received, the guide shaft 18 stops moving at substantially the same position as in the conventional example. However, the upward rotation of the guide shaft 18 around the rotary shaft 16 does not affect the guide groove.
The rear guide surface 19a of the rear cover 19 restricts the contact, so that the rear end portion 15a of the back cover upper wall 15 will face the upper surface 1c of the main body case 1 side even if an external force is applied.
Does not come up more than.

When the front cover 5 is opened and rotated upward, the guide shaft 18 is slidably guided along the guide groove 19 by the upward movement of the rotary shaft 16 along the guide groove 19.

[Another embodiment example]

In the above formula, the present invention may have a relationship of l'≈l + a.

When the rear end portion 15a of the upper wall 15 of the back cover 13 is received and supported by the upper wall receiving surface 1d on the main body case 1 side,
The upper surface of the case may be flush with the upper surface 1c of the case. The formation position of the upper wall receiving surface 1d is not limited to the illustrated example.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view of a main part, FIG. 2 is an enlarged vertical sectional view of the main part, and FIG. FIG. 4 is a schematic vertical sectional side view showing a comparison of FIG. 4, FIG. 4 is an external perspective view of a tape cartridge targeted by the present invention, and FIG. 5 is a partially cutaway plan view thereof. FIG. 6 is a vertical cross-sectional side view of the main part of the conventional example, and FIG. 7 is a vertical cross-sectional side view of the main part for explaining a defective state in the conventional example. 1 …… Main body case, 1c …… Upper surface of main body case, 1d …… Upper wall receiving surface, 5 …… Front lid, 11 …… Spring member, 12 …… Pocket, 13…
… Back cover, 14 …… Inclined wall, 14a …… Lower end of inclined wall, 15 …… Upper wall, 15a …… Rear end of upper wall, 16 …… Rotary axis, 18 …… Guide axis, 1
9 …… Guide groove.

Claims (2)

[Claims] 1. A pocket 12 for tape loading on the front surface.
And a main body case 1 in which a recess is provided, and the main body case 1 is pivotally attached to the main body case 1 so as to be freely opened and closed.
The front lid 5 covering the outer surface side of the tape 2 led out to the front surface of the tape 2 and the back surface side of the tape 2 pivotally attached to the back side of the front lid 5 around the rotation shaft 16 at the location where the pocket 12 exists. A back cover 13 for covering the main body case 1 and the back cover 13 are provided between the main body case 1 and the back cover 13, and linking means for opening and closing the back cover 13 in conjunction with opening and closing of the front lid 5 are provided. A guide groove 19 formed on at least one of the left and right side surfaces of the tape loading pocket 12 formed on the front side of the tape, and a guide shaft 18 that is continuously extended from the back cover 13 and is fitted into the guide groove 19. When the lid 13 is in the closed posture, the rear end portion of the upper wall 15 of the back lid 13 is provided on the left and right sidewalls of the pocket 12 on the main body case 1 side.
15b forms an upper wall receiving surface 1d which is received and supported, and the radius of rotation r'of the guide shaft 18 with respect to the axis of the rotary shaft 16 is set to be larger than the conventional radius r of rotation. Thus, the rear end portion 15a of the upper wall 15 of the back lid 13 is received and supported by the upper wall receiving surface 1d of the main body case 1 before the front lid 5 is in the completely closed posture. Tape cartridge. 2. With the back cover 13 in the closed posture, the upper surface of the upper wall 15 of the back cover 13 is sunk below the upper surface 1c of the main body case 1, and the upper wall 15 is in a rearward and downward tilted posture. The tape cartridge according to claim 1, wherein the tape cartridge is received and supported by the upper wall receiving surface 1d on the main body case 1 side.