JPH0687352B2 - Tape car ledge - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tape cartridge incorporating a hub lock plate for preventing rotation of a tape winding hub.

[Conventional technology]

Conventionally, as a tape cartridge of this type, for example,
Those shown in FIGS. 9 and 10 are known (for example, JP-A-61-68787 and JP-A-62-71077). There, there is shown a digital recording / playback type audio tape cartridge, and the main body case 1 is made by abutting the upper and lower plastic cases 1a and 1b and integrally connecting them by screws or the like. The hubs 3 and 3 around which the tape is wound are stored rotatably.

The main body case 1 is equipped with a hub lock plate 13 for stopping rotation of the left and right hubs 3, 3 when not in use. The hub lock plate 13 includes a horizontally-long horizontal main plate 13a, side plates 13b and 13b connected downward from the left and right ends of the main plate 13a, and each side plate.
The main plate 13 has an arm portion 13c connected to the front from the lower end of 13b.
Lock claws 14 and 14 are projected rearward from the left and right of the rear end of a and the arm 1
A passive protrusion 15 is provided outwardly at the front end of 3c.

The hub lock plate 13 has lock claws 14 and 14 on the left and right hubs 3 and 3.
It is movable in the front-rear direction between a lock position in which it abuts and engages with the peripheral surface of the shaft portion 17 formed at each upper end and an unlock position that is disengaged from the peripheral surface of the shaft portion 17. Further, the main plate 13a of the hub lock plate 13 and the ribs 1 projectingly provided on the inner surface of the upper case 1a.
A spring member 19 is bridged between 1 and this spring member 19
The hub lock plate 13 is constantly urged to move toward the lock position. In other words, the hublock plate 13 has a locking claw when not in use.
The rotation of the hub 3 is restricted by the abutting engagement of the hub 14 with the hub 3, and when the recorder is loaded in the recorder, the front lid 6 swings upward by the operation member on the recorder side. Then, the side piece 6a of the front lid 6 is abuttingly engaged with the passive projection 15 to pull and move the hub lock plate 13 to the front unlock position.

[Problems to be solved by the invention]

Here, what matters is the point regarding the assembling of the hub lock plate 13. When assembling this kind of tape cartridge, the front cover 6 and the hub lock plate 1 are previously assembled to the upper case 1a in advance, and the hub 3 around which the tape 2 is wound.
The upper case is added to the lower case 1b that incorporates the required parts such as
Both cases 1a and 1b are covered with 1a and connected with screws or the like.

When carrying out such an assembly method, the upper case 1a
When covering the lower case 1b, the hub lock plate 13
It is necessary to temporarily fix the hub lock plate 13 to the upper case 1a in advance so as not to separate from the inner surface of the. As a temporary fixing means, there is a method of temporarily fixing the hub lock plate 13 to the inner surface of the upper case 1a with a part of the transparent window plate 12 formed in the upper case 1a.

As one of the methods, for example, a transparent window plate 12 is previously formed separately from the upper case 1a, and the transparent window plate 12 is attached to the upper case 1a.
When adopting the method of forming a window by fitting it into the opening of and welding, as shown in FIG. 10, simultaneously forming the transparent window plate 12 and integrally forming the hub lock holding piece 12a on the window plate 12 as shown in FIG. can do. Therefore, after welding the transparent window plate 12, the hub lock plate 13 can be temporarily fixed to the inner surface of the upper case 1a by the hub lock holding piece 12a.

However, in the case of integrally molding the upper case 1a of the transparent window plate 12 by two-color molding (for example, Japanese Utility Model Laid-Open No. 60-89678), the step of fitting the transparent window plate 12 into the opening and the step of welding are omitted. On the other hand, the hub lock retainer piece 12 is advantageous because it is possible.
It is difficult or impossible to integrally form a into the transparent window plate 12, and therefore, the hub lock plate 13 cannot be temporarily fixed by using a part of the transparent window plate 12.

In the tape cartridge adopting the above form,
As shown in the figure, when the shutter 8 mounted on the bottom surface side of the main body case 1 is pushed backward, the arm portion 13c of the hub lock plate 13 and the passive protrusion 15 are exposed to the outside of the side surface of the main body case 1, so that the user can Those arm portions 13c or passive protrusions 15
I noticed that an unexpected situation in which a finger or the like was caught on and pulled forward was brought about.

In view of this, the present invention is a tape in which a hub lock plate 13 for stopping the rotation of a hub is incorporated in the main body case 1 so as to be movable in the front-rear direction between a locked position where the hub lock plate 13 is in abutting engagement with the hub 3 and an unlock position where the hub lock plate 13 is disengaged from the hub 3. In the cartridge, even when the transparent window plate 12 is integrally molded with the upper case 1a, the hub lock plate 13 can be temporarily fixed to the upper case 1a side, thereby improving the assembling property.

Further, an object of the present invention is to obtain a highly reliable one by taking a defense measure against an illegal handling in which the user has mischievously pulled the haslock plate 13.

[Means for solving problems]

In the present invention, temporary fixing means for the hub lock plate 13 is provided between the sliding surfaces of either the upper case 1a or the lower case 1b and the hub lock plate 13. The temporary fixing means is a hub lock plate 13
The engaging groove 21 is provided on either the main body case 1 or the hub lock plate 13, and the other engaging groove 21 is provided on the other side.
21 is provided with a locking claw 24 that is slidably engaged in the front-rear direction. Further, at the terminal position where the hub lock plate 13 moves toward the front unlock position, the hub lock plate 13 is brought into contact with the position regulating portion 25 provided on the side of the upper case 1a or the lower case 1b where the temporary fixing means is not provided. The engagement between the engaging groove 21 and the locking claw 24 is prevented from being accidentally disengaged.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 1, the main body case, which is made up of upper and lower plastic cases 1a and 1b, has tape outlets 4 and 4 on the left and right, and a tape loading pocket 5 between both outlets 4 and 4. Each of them is formed, and the tape 2 is led out from one hub 3 to the front side of the case through the tape outlet 4, and is wound around the other hub 3.

In FIG. 2, on the front side of the upper case 1a, the front lid 6 for protecting the tape is rotated around the rotating shaft 7 in a posture of closing the front of each of the pocket 5 and the tape outlet 4 and an upward opened posture (in use). It is pre-assembled to be freely rotatable.

In FIGS. 1 and 6, a shutter 8 is slidable in the front-rear direction on the outer surface side of the loss wall 9 of the lower case 1b between a front closed position and a rear open position for closing the opening lower surface of the pocket 5. is there. The holding means at each position of the shutter 8 is provided with a clock pawl 27 on a part of the bottom wall 9 of the lower case 1b so as to be elastically deformable inward and outward of the case, and a protrusion provided on the lower surface side of the tip of the lock pawl 27. 27a is selectively engaged with the front and rear holes 8a and 8b opened in the shutter 8.

In FIG. 2, a transparent window plate 12 for visually recognizing the tape winding amount and the like on each hub 3 is integrally formed on the upper case 1a over the left and right of the latter half portion by a two-color molding method.

On the inner surface of the upper case 1a, a spring-supporting boss 20 is provided at the center of the front side of the transparent window plate 12 in the left-right direction. The boss 20 for spring support is provided on the front end side of the transparent window plate 12 for restricting the lock position of the hub lock plate 13, which will be described later. The rib 18 is provided so as to project, and a pair of left and right engaging grooves 21 for temporary fixing are formed between the boss 20 and the rib 18. As shown in FIG. 3, the engaging groove 21 has a protrusion 22 having an L-shaped cross section integrally formed on the inner surface of the upper case 1a, and the horizontal portion of the inner surface of the upper case 1a and the protrusion 22 parallel thereto. A predetermined length is formed in the front-rear direction between 22a and 22a. The left and right engaging grooves 21, 21 are formed to face each other.

A hub lock plate 13 is pre-assembled between the boss 20 and the rib 18 on the inner surface of the upper case 1a so as to be movable in the front-rear direction by a predetermined stroke.

The hub block plate 13 is entirely made of a plastic molded product, and has a strip-shaped main plate 13a that is long in the left-right direction, side plates 13b and 13b that are vertically connected from both left and right ends of the main plate 13a, and each side plate.
It has an arm portion 13c extending forward from the lower end of 13b, and a passive protrusion 15 protruding outward at the tip of each arm portion 13c. Further, lock claws 14 are provided so as to project rearward from the center left and right of the rear end of the main plate 13a, and a pair of upper and lower spring receiving protrusions 23 23 which are displaced laterally from the center left and right of the front end of the main plate 13a are projected forward. In addition, locking claws 24 for temporary fixing are provided near the left and right upper spring receiving projections 23.

To temporarily fix the hub lock plate 13 to the upper case 1a, first, as shown in FIGS. 4 (a), (b) and FIG. 5, mount the hub lock plate 13 on the boss 20 on the inner surface of the upper case 1a. And the front end of the engaging groove 21. Next, the haslock plate
13 is moved to the rear side, and the locking claw is moved as shown in Fig. 4 (c).
Insert 24 into engagement groove 21 from its front end.

As a method of fitting the locking claw 24 into the engagement groove 21, for example, as shown in FIG.
It is also conceivable to force it from above to fit it into the engagement groove 21. However, in that case, the engagement groove 21 or the locking claw 24 is easily damaged and deformed. Therefore, as described above, the engaging claw 24 is inserted from the front end of the engaging groove 21 in the longitudinal direction.

Then, as shown in FIG. 2, the coil portion 19a of the spring member 19 formed by a torsion coil spring is inserted into the outer periphery of the boss 20, and both arms 19b and 19b thereof are attached to the spring receiving projections of the hub lock plate 13.
23 and 23 are sandwiched and engaged, and this completes the temporary fixing of the hub lock plate 13 to the upper case 1a.

The front-rear distance between the front end of the engagement groove 21 and the boss 20 is set to the full width of the main plate 13a which is set to the minimum width necessary to secure the strength of the hub lock plate 13 due to space restrictions. There is.

As for the length of the engaging groove 21 in the front-rear direction, the hub lock plate 13 has ribs 18
The stroke between the lock position where the lock claw 14 is engaged with the hub 3 and is engaged with the hub 3 and the unlock position where the lock claw 14 is disengaged from the hub 3 is set to be almost full. Therefore, the hublock plate 13
There is no problem that the locking claws 24 come out from both ends of the engaging groove 21 in the front-rear direction when normally moves in parallel between the locked position and the unlocked position.

However, as shown in FIG. 9, if the arm portion 13c or the passive protrusion 15 exposed to the outside of the main body case 1 of the hub lock plate 13 is pinched with a finger or the like and pulled forward, as shown in FIG. 13 is moved further forward than the original unlocked position, whereby the locking claw 24 on the side inclined forward is engaged with the engaging groove 21.
If it comes out of the front end of the engaging groove 24 and then goes out for a day, the locking claw 24 will be caught on the front end side of the engaging groove 21 and will not be engaged with the engaging groove 21 again.

Therefore, even when one of the left and right arm portions 13c and 13c is pulled forward, the hub lock plate 13 does not move the locking claw 24 forward from the front end of the engagement groove 21 so that the forward movement end thereof does not come out. The position needs to be regulated.

As a position regulating means, it is conceivable that a position regulating pin or the like is erected on the inner surface of the upper case 1. However, when the method for assembling the hub lock plate 13 to the upper case 1a described above is adopted, the position of the position regulating pin or the like will be considered. The restriction pin gets in the way and makes assembly impossible or difficult.

Therefore, as a means for restricting the forward position of the hub lock plate 13, it is provided on the lower case 1b side. That is, as shown in FIG. 1, when the position restricting portions 25, 25 are provided at the front left and right positions on the inner surface of the lower case 1b and the upper case 1a and the lower case 1b are brought into contact with each other, the position restricting portions 25, 25 are formed. Is set so as to coincide with the front of the abutment portions 26, 26 projecting to the left and right of the front end of the main plate 13a of the hublock plate 13, and when the hublock plate 13 moves to the front unlocked position, the abutment portion 26・ 26 is the position control unit 25 ・
The locking claw 24 is prevented from coming out of the front end of the engagement groove 21 by contacting the 25 and restricting further movement to the front.

As the position restricting portion 25 provided on the lower case 1b side, as shown in FIG. 6, a spring 28 is erected on the lock claw 27 in order to urge the lock claw 27 of the shutter 8 to the outside of the case. A surrounding wall 29 provided for holding is used. The wall
Numeral 29 is integrally provided on the lock claw 27 of the lower case 1b so as to be located above the tip end side and project upward from the bottom wall 9. If the surrounding wall 29 is used as the position restricting portion 25 in this way, the inner surface shape of the lower case 1b can be simplified and the molding thereof can be facilitated. However, it goes without saying that the position restricting portion 25 may be separately provided at a position different from the surrounding wall 29.

Further, the position restricting portions 25, 25 may be set at positions near the front end of the main plate 13a of the hub lock plate 13 in the left-right direction. For example, as shown by an imaginary line F in FIG. It is desirable that the position can be regulated more stably than setting the position regulating portion 25 such as a pin at the central position in the direction.

[Another embodiment]

In the above embodiment, the temporary fixing means for the hub lock plate 13 is the upper case.
Although it is provided between the sliding surfaces of 1a and the hub lock plate 13, it may be provided between the sliding surfaces of the lower case 1b and the hub lock plate 13 instead. In such a case, the position regulating portion 25 is provided on the upper case 1a on the side where the temporary fixing means is not provided.

Needless to say, the temporary fixing means by the engaging groove 21 and the locking claw 24 of the hub lock plate 13 can be similarly applied to the tape cartridge in which the separately molded transparent window plate 12 is welded to the upper case 1a.

〔The invention's effect〕

According to the present invention, between the sliding surfaces of either the upper case 1a or the lower case 1b and the hub lock plate 13, the engaging groove 21 is engaged with one of them and the engaging groove 21 is engaged with the other. Since the temporary fixing means by providing the locking claws 24 respectively is adopted, the temporary fixing means does not hinder the forward and backward movement of the hub lock plate 13, and even if the transparent window plate 12 is attached to the upper case 1a. Even in the case of integral molding, the hub block plate 13 can be easily and surely assembled to the upper case 1a in advance. Moreover, after temporarily fixing the hub block plate 13 to the upper case 1a or the lower case 1b, the upper case 1a and the lower case 1b are
It can be put on without removing 13, which is advantageous in automating the assembly.

Further, at the terminal position where the hub lock plate 13 moves toward the front unlock position, the hub lock plate 13 contacts the position regulating portion 25 and the engagement groove 21 and the locking claw 24 are not disengaged. Therefore, as shown in FIG. 9, the arm portion 13c of the hub lock plate 13 or the passive protrusion 15 is exposed to the outside from the main body case 1, and the arm portion 13c and the passive protrusion 15 are misleading by the user. It can sufficiently handle illegal handling such as being caught by pulling a finger or the like. Moreover, since the position restricting portion 25 is provided on the lower case 1b or the upper case 1a side where the temporary fixing means is not provided, the hub lock plate 13 is provided on the upper case 1a or the lower case.
The position regulating portion 25 does not get in the way when temporarily fixed to 1b, which contributes to the improvement of the assembling property.

[Brief description of drawings]

1 to 6 show an embodiment of the tape cartridge according to the present invention. FIG. 1 is a plan view of the inside of the upper case with a part cut away, and FIG. 2 is a hub lock plate and front lid. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 4A, FIG. 4B, and FIG. Fig. 5 is a vertical sectional side view for explaining the process of temporarily fixing the plate, Fig. 5 is a bottom view showing a state of one process of temporarily fixing the hublock plate to the upper case, and Fig. 6 is a sectional view taken along line BB in Fig. 1. Is. FIG. 7 is a plan view showing a defective detached state of the hub lock plate. FIG. 8 is a vertical sectional front view showing a defective fitting state of the hub lock plate. 9 and 10 show a conventional tape cartridge, FIG. 9 is an external perspective view, and FIG. 10 is a bottom view of the upper case. 1 …… Main body case, 2 …… Tape, 3 …… Hub, 13 …… Hablock plate, 21 …… Engagement groove, 24 …… Locking claw, 25 …… Position control part.

Claims (1)

[Claims] 1. A hub 3 around which a tape 2 is wound is rotatably incorporated in a main body case 1 formed by abutting upper and lower cases 1a and 1b, and a hub lock plate 13 for preventing the hub from rotating is provided in the main body case 1. It is movably incorporated in the front-rear direction between a rear lock position that abuts and engages with the hub 3 and a front unlock position that is disengaged from the hub 3, and has either the upper case 1a or the lower case 1b and the hub lock plate 13. The temporary locking means for the hub lock plate 13 is provided between the sliding surfaces of the two, and the temporary lock means includes an engaging groove 21 provided in the front-rear direction on either the main body case 1 or the hub lock plate 13. On the other hand, an upper case 1a or a lower case which is composed of a locking claw 24 provided so as to slidably engage in the engaging groove 21 in the front-rear direction and is not provided with a temporary fixing means.
On the 1b side, the movement end position in the unlock position direction is set so that the engagement groove 21 and the locking claw 24 are not disengaged when the hub lock plate 13 moves in the front unlock position direction. A tape cartridge, characterized in that it is provided with a position restricting portion (25) for restricting contact.