JPH0743905B2 - Tape car ledge - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tape cartridge provided with a stopper for stopping the rotation of the tape reel when not in use, and uses a reaction force of a spring member mounted together with the stopper. The measures are taken to prevent the deformation of the body case that occurs.

[Conventional technology]

4 to 7 show a conventional tape cartridge for 8 mm video, in which a main body case 1 formed by abutting upper and lower cases 1a and 1b made of plastic.
The reels 3 and 3 around which the tape 2 is wound are rotatably built in on the left and right sides of the inside, and the tape 2 is fed from one reel 3 and passed through the tape loading pocket 4 on the front side of the main body case 1. Then, it is wound on the other reel 3. Pocket 4 for tape loading on main unit case 1
When not in use, the tape 2 that has been drawn out is covered and protected by front and rear lids 5 and 6 that are openably and closably mounted on the front surface of the main body case 1.

In addition, a stopper 7 is provided at the rear left and right center portion inside the main body case 1 to prevent the left and right reels 3, 3 from rotating when not in use.
Is installed so as to be located between both reels 3 and the rear wall 8b of the lower case 1b. The stopper 7 is a plastic molded product, and the slide block 9 and a pair of right and left lock claws 10 projecting from the front end to the front in an eight-character shape and capable of expansion and contraction.
・ Has 10 and. The stopper 7 is fitted between the guide ribs 11 on the inner surface of the lower case 1b,
Lock claws 10 ・ 10 are lower flanges 12 of left and right reels 3 ・ 3
The front lock position that abuts and engages with the teeth 12a on the periphery of the
It is movable in the front-rear direction to and from the rear unlock position. A spring member 13, which is a compression coil spring, is interposed between the rear end of the slide block 9 of the stopper 7 and the rear wall 8b of the lower case 1b. The spring member 13 constantly presses the stopper 7 toward the front lock position. I am energetic.

When not in use, the stopper 7 is in the front lock position, and the lock claw 10 is held in a state in which the lock claw 10 is in abutting engagement with the reel 3 to restrict the rotation in the tape slack direction. When loaded on the deck, the unlocking member on the deck side is inserted into the case from the operation port 14 opened between the guide ribs 11 on the inner surface of the lower case 1b, engages with the stopper 7, and the spring member 13 The stopper 7 is moved to the rearward unlocked position against the spring force.

[Problems to be solved by the invention]

However, in the case where the spring member 13 is interposed between the stopper 7 and the rear wall 8b of the lower case 1b, the reaction force of the spring member 13 directly acts on the rear wall 8b. Therefore, the rear wall 8b is warped and deformed toward the outside of the case as shown by the phantom line F in FIG. Especially, when it is placed in a high temperature environment, its warp deformation is promoted. Naturally, the amount of deformation of the back wall 8b increases as the spring force increases.

In this way, when the rear wall 8b of the lower case 1b is warped and deformed in the outer direction of the case, it projects from the rear wall 8a of the upper case 1a. The problem occurs.

An object of the present invention is to effectively prevent the rear wall of the main body case from being deformed toward the outside of the case by improving the receiving structure of the spring member of the stopper in view of the above fact.

[Means for solving problems]

In order to achieve the above object, according to the present invention, as shown in FIG. 1, a reel rotation stopping stopper 7 is abuttingly engaged with the reel 3 between the reel 3 in the main body case 1 and the rear wall 8b. It is assumed that the tape cartridge has a structure in which it is movably incorporated between a locked position and an unlocked position which is disengaged from the reel 3, and a spring member 13 constantly presses and urges the stopper 7 toward the locked position. Where the spring member
13 may be a leaf spring or the like other than the compression coil spring.

In addition, according to the present invention, the spring receiving wall 15 that receives the reaction force of the spring member 13 is provided inside the main body case 1 separately from the back wall 8b. Specifically, the stopper 7 on the inner surface of the main body case 1
A spring receiving wall 15 is provided between the rear wall 8b and the rear wall 8b so as to project from the inner surface of the main body case, and a spring member is provided between the spring receiving wall 15 and the stopper 7.
It has 13 intervening.

[Action]

At this time, the reaction force of the spring member 13 is prevented from directly acting on the back wall 8b of the main body case 1, and the back wall 8b is deformed by the spring member 13 toward the outside of the case even in a high temperature environment. It will be possible to prevent well.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The structure of the tape cartridge as a whole and the structure of the stopper 7 itself are substantially the same as those of the conventional one described above, and therefore, the same reference numerals are given and their description is omitted, and the spring member 13 of the conventional stopper 7 is omitted. Only points different from the receiving structure will be described.

A spring receiving wall (15) is integrally formed on the inner surface of the lower case (1b) made of plastic at the front side of the rear wall (8b) so as to project from the inner surface of the case. At this time, the left and right ends 15a and 15a of the spring receiving wall 15 are integrally connected to the existing reel movement restricting ribs 16 and 16 protruding from the inner surface of the case to enhance the rigidity of the spring receiving wall 15. Further, the guide ribs 11 and 11 for guiding the stopper 7 in the front-rear direction are provided so as to project from the inner surface of the case such that the rear ends 11a and 11a of the guide ribs 11 and 11a integrally abut on the spring receiving wall 15.

Thus, a spring member is provided between the stopper 7 and the spring receiving wall 15.
With the interposition of 13, the front end of the spring member 13 to the stopper 7,
The rear ends are brought into contact with the spring receiving walls 15, respectively.

At that time, the reaction force of the spring member 13 is not received by the spring receiving wall 15 and does not act on the back wall 8b, so that the deformation of the back wall 8b due to the reaction force of the spring member 13 can be eliminated. Become.

[Another embodiment]

FIG. 3 shows another embodiment of the present invention, in which the guide ribs 11 and 11 of the stopper 7 are formed in such a shape that their rear ends abut against the rear wall 8b and the spring receiving wall 15 is formed. It is integrally molded so that it is located between 11 and 11.

〔The invention's effect〕

As described above, according to the tape cartridge of the present invention, the stopper 7 on the inner surface of the main body case 1 and the rear wall
With the simple means of projecting from the inner surface of the spring receiving wall 15 case receiving the reaction force of the spring member 13 with the 8b, the rear wall 8b can be effectively and reliably prevented from deforming to the outside of the case. There is an advantage that it does not hinder the loading operation.

[Brief description of drawings]

1 and 2 show an embodiment of a tape cartridge according to the present invention, and FIG. 1 is a plan view of a main part, and FIG.
The figure is a vertical side view of the main part. FIG. 3 is a plan view of an essential part showing another embodiment of the present invention. 4 to 7 show a conventional tape cartridge, and FIG. 4 is an external perspective view of the tape cartridge,
FIG. 5 is an internal plan view, FIG. 6 is an exploded perspective view of essential parts, and FIG.
The figure is a vertical side view of the main part. 2 ... tape, 3 ... reel, 7 ... stopper, 8b ... rear wall, 9 ... slide block, 10 ... lock claw, 12a ... teeth, 13 ... spring member, 15 ... spring receiving wall .

Claims (1)

[Claims] 1. A reel 3 around which a tape 2 is wound is rotatably accommodated and arranged in a main body case 1, and a reel rotation stopper 7 is provided between a rear wall 8b of the main body case 1 and the reel 3. 3 is movably mounted between a lock position that abuts and engages with 3 and an unlock position that is disengaged from the reel 3, and a spring receiving wall 15 is provided between the stopper 7 on the inner surface of the main body case 1 and the rear wall 8b. A tape cartridge characterized in that a spring member (13) protruding from the above is interposed between the stopper (7) and the spring receiving wall (15) for biasing the stopper (7) in the lock position direction.