JPS6331259Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a tape cartridge having a structure in which a front cover for protecting the tape is pivoted to the cartridge case so that the front side of the cartridge case can be opened and closed, and the front cover is prevented from being opened when not in use. This is an improved lid closing lock means for holding the front lid in the closed position.

The video tape cartridge shown in the drawing has a front cover 10 for protecting the tape on the front of the cartridge case 1, and when not in use, the front cover 10 is locked in a closed position and the tape is led out to the front of the case. It is designed to cover and protect the outside of 2.

The problem lies in the locking means for closing the front lid 10, which has conventionally been generally installed in one of the front left and right corners of the cartridge case 1. However, since the tape guide member 9 is arranged in the relevant part and there is not enough space to begin with, the work of assembling the closing locking means is troublesome and difficult, and the function is forced to operate. There was a drawback that the results were uncertain. In particular, problems arose when trying to downsize the tape cartridge.

Focusing on this fact, this invention changes the location of the front cover closing locking means from inside the cartridge case to outside the case, and also moves the locking tool constituting the closing lid locking means in a sliding or rotating manner. The method is changed to a linear sliding method in the front and back direction and is assembled inside the cartridge case, so that even when downsizing the tape cartridge, the closing lid locking means can be easily assembled without taking up space, and the operation is easy. This is to ensure certainty.

The details will be explained below based on a small video tape cartridge shown in the drawings.

In FIGS. 1 to 3, 1 is a cartridge case. The cartridge case 1 is formed by screwing together upper and lower plastic cases 1a and 1b with lids fitted together, and has tape reels 3, 3 on which tape 2 is wound on the left and right sides of the interior. tape reel 3,
3 is located above each of the left and right drive shaft insertion holes 5, 5 transparently provided in the bottom wall 4 of the cartridge case 1;
The center of rotation is pressed down by a plate spring 7 fixed to the inner surface of the upper wall 6, and when the case 1 is loaded into the magnetic recording device, the drive shaft of the magnetic recording device passes through each insertion hole 5 to each reel. 3 into the hub hole 8.
There are tape guide members 9, 9 on the front left and right sides of the cartridge case 1, and the tape 2 is led out from one reel 3 to the front of the case and wound onto the other reel 3.

A front cover 10 for tape protection that closes the front side of the cartridge case 1 is pivotally attached to the cartridge case 1 so that it can be opened and closed.

The front lid 10 includes a front plate 11 that closes the front surface of the case 1 between the left and right sides, connecting pieces 12 and 13 extending rearward from both left and right ends of the front plate 11, and inner surfaces of the connecting pieces 12 and 13. Pivot 1 protruding from opposite sides
4, 14, in which the left and right connecting pieces 12, 13 are located in the front end concave portions 15a, 1 of the left and right side walls 15, 16 of the cartridge case 1.
6a, and the pivots 14, 14 are fitted and pivoted in the pivot holes 17, 17 on the case side wall, respectively, as shown in FIG. The torsion spring 1 is rotatable to the open position and is attached to the pivot shaft 14 on the right side in the figure.
9, it is rotationally biased to the closed position. The front cover 10 is closed when the tape cartridge is not in use, and covers and protects the front outside of the tape 2, and when the tape cartridge is loaded into a magnetic recording device,
When the front cover 10 is opened, a tape loading pin on the magnetic recording device side enters a pocket 20 formed on the front surface of the case 1, and the tape 2 is pulled out to the front of the case.

Front end concave portion 16a of right side wall 16 of main body case 1
A gap 21 is formed between the connecting piece 13 on the right side of the front cover 10 and
is formed, and the above-mentioned torsion spring 19 is placed in this gap 21.
and a means 22 for locking the front cover 10 in the closed position when the tape cartridge is not in use.

In FIG. 6, the torsion spring 19 has an intermediate coil portion 19a fitted to the pivot shaft 14, and one end 19b engaged and supported in a vertical groove 23 provided on the outer surface of the front end recessed portion 16a of the case right side wall 16. and the other end 19
c is received and supported by a spring support 25 provided on the inner surface of the right side connecting piece 13 of the front cover 10.

5 and 6 illustrate the closing locking means 22 of the front lid 10, which is formed between the front extension portion 16b of the case right side wall 16 and the front end recessed portion 16a on the rear side of the gap 21. Bottomed groove 26
A block-shaped locking tool 27 is installed so as to be horizontally slidable in the front-rear direction with its front end facing the gap 21, and a protrusion 29 formed on the outer surface of the rear end of the locking tool 27 is attached to the case right side wall 16. The extension portion 16b is guided into a recessed hole 30 formed on the inner surface of the recessed hole 30, and the protrusion 29 is brought into contact with the front end surface of the recessed hole 30 to restrict the forward sliding limit of the locking tool 27.
A protrusion 29 is applied to the rear end surface to restrict the rearward sliding limit of the locking tool 27, and a pressing rib 31 protruding from the inner surface of the right side wall 16 of the case is used to prevent the locking tool 27 from lifting up. At the rear of the locking tool 27, the base end of the leaf spring 33 is supported and fixed in a cantilevered manner to a spring receiver 32 that stands up from the case bottom wall 4, and the extending tip of the leaf spring 33 is attached to the rear end surface of the locking tool 27. The locking tool 27 is pressed forward by pressing the locking tool 27 against it. An engaging portion (square projection) 34 is protrudingly provided on the inner surface of the right side connecting piece 13 of the front lid 10, and the engaging portion 34 is located on the rear side of the pivot shaft 14 of the front lid 10, and locks the locking tool 27. The horizontal upper end surface 27a on the front end side of the locking member 27 is positioned in close proximity to the lower side of the engaging portion 34 when the locking member 27 is slid to its forward protrusion limit.

In this case, since the tip of the locking tool 27 is located below the engaging part 34 of the front cover 10 which is in the closed position when the tape cartridge is not in use, the engaging part 34 is positioned above the locking tool 27. The front lid 10 is surely locked from rotating upwardly about the pivot 14 by contacting and interfering with the end surface 27a. When the tape cartridge is inserted into the lifting platform of the magnetic recording device and loaded,
A lock release member 35a fixed to the lifting platform is relatively guided from the front, enters the gap 21 through a notch 36 formed at the lower end of the front plate 11 of the front cover 10, and locks the front end of the locking tool 27. Press the surface. This causes the locking tool 27 to move backward against the leaf spring 33,
The front end of the locking tool 27 comes off from below the engaging part 34, and the closing lock of the front lid 10 is released. Next, when the lifting platform on the magnetic recording device side is pushed down, the fixing lever 37 on the magnetic recording device side comes into contact with the notch 36 of the front lid 10, and the front lid 10 is raised as shown in FIG. Open and rotate. Note that to release the closing lid lock, instead of inserting the lock release member 35b from the front,
As shown in FIG. 6, the lock release member 35b whose upper end surface is formed as an inclined surface is inserted from the lower surface side of the opening of the gap 21, and the upper end surface is brought into contact with the lower corner of the front end side of the lock tool 27, thereby locking the lock tool 27. 27 may be moved backward.

The lock release member 35a shown in the figure also serves to prevent incorrect loading, and when the tape cartridge is loaded into the magnetic recording device in the normal position, it enters the gap 21 through the notch 36 without any trouble. If you try to load a tape cartridge into a magnetic recording device in the wrong orientation (front-to-back or upside-down),
The lock release member 35a contacts and interferes with other parts of the tape cartridge to prevent incorrect loading of the tape cartridge.

If the pocket 28 into which the tape loading pin is inserted is provided with a series of wide and deeply recessed recesses on the left and right sides as shown in the illustrated example, the tape 2 stretched between the left and right tape guide members 9, Although the outside of the front surface is covered by the front cover 10 when not in use, it can be stained by dust that enters from the lower and upper surfaces of the opening of the pocket 20, so this must be prevented. Therefore, as shown in FIGS. 2 and 3, a dust cover 39 is swingably supported on the inside of the front lid 10 at the location where the pocket 20 is present, and this dust cover 39 is used to protect the tape 2 when not in use.
The inner side including the lower side of the pocket 20 and the upper surface of the opening of the pocket 20 are sealed to prevent dust from adhering to the tape 2. This dust cover 39 has a pocket 20
The dust cover 39 connects to the cam grooves 40, 40 provided on the left and right sides of the tape 2 after opening the front cover 10.
It moves upward together with the front cover 10 without interfering with the front cover 10 at all.

In FIG. 3, in order to optically detect the beginning and end of the tape 2 when the tape cartridge is loaded into the magnetic recording device, a through hole 41 for detecting the end of the tape is provided in the front center of the bottom wall 4 of the case. Open the front end concave portions 15a, 1 of the left and right case side walls 15, 16.
6a has through holes 42, 42 extending through the inside and outside, and when the front lid 10 is closed when not in use, the connecting pieces 12, 13 close the through holes 42, 42, as shown in FIG. Close the outside to prevent dust from entering the inside, load the magnetic recording device, and close the front cover 1.
0 opens, the connecting pieces 12 and 1 open as shown in FIG.
Through holes 42, 43 through notches 43, 43 provided in 3
42 is opened, a lamp on the magnetic recording device side is inserted into the through hole 41, and the light from the lamp is directed to the tape 2.
The light passes through the transparent leader tape portions connected to both ends of the magnetic recording device and is received by the sensor on the magnetic recording device side through the left and right through holes 42, 42, respectively.
However, the detection light from the magnetic recording device side is projected into the case from the left and right outside of the cartridge case 1 through the through holes 42, 42, and the projected detection light is detected by a sensor on the magnetic recording device side inserted into the through hole 41. You may also receive However, in the example shown, the front cover 1
0 is in the closed position, the engaging portion 34 closely closes the outside of the right through hole 42 to prevent dust from entering the through hole 12 through the gap 21 as much as possible.

FIG. 8 shows another embodiment of the present invention, in which the front end surface of the locking device 27 is attached to a downwardly inclined contact surface 4.
3, and an abutment surface 44 hanging vertically from the inclined downward end of the abutment surface 43,
The lock release member 35a, which has been relatively inserted into the gap 21 from the front, comes into contact with the vertical contact surface 44 and pushes the locking tool 27 to the rear lock release position, and the lock release member 35a, which has been inserted into the gap 21 from below, comes into contact with the vertical contact surface 44 and pushes the locking tool 27 to the rear lock release position. The member 35b contacts the inclined abutment surface 43 and similarly pushes the locking tool 27 rearward to the unlocked position. Further, as the spring means for pressing and biasing the locking tool 27 to the forward locking position, a compression coil spring may be interposed between the locking tool 27 and the spring receiver 32 instead of a leaf spring, or a compression coil spring may be interposed between the locking tool 27 and the spring receiver 32. It may be of a form in which an integral or separate elastic tongue piece extends rearward from 27 and is elastically deformed so as to press against the spring receiver 32.

In addition, when the engaging portion 34 on the front lid 10 side is located forward of the pivot 14, the lower surface of the front end side of the locking tool 27 may be positioned close to the upper surface of the engaging portion 34. good.

As explained above, according to this invention, the front end concave portion 16a of the left and right side walls 16 of the cartridge case 1 and the connecting piece 13 of the front lid 10 facing thereto
A gap 21 is provided between the two, and a locking tool 27 is installed on the cartridge side with its front end facing the gap 21 so as to be slidable in the front-rear direction.
Therefore, unlike the conventional configuration in which the locking device 27 is placed at the front corner of the cartridge case, the tape guide member 9 remains in the optimum tape running path and is not obstructed by these. The closing locking means 22 of the front cover 10 can be easily and securely assembled without any problems. In particular, since the locking tool 27 is designed to slide in the front-rear direction, unlike conventional locking devices that swing left and right around a vertical or horizontal axis or slide in the left-right direction, the lock tool 27 slides in the left-right direction. The operation of the closing lid locking means 22 can be ensured without taking up space in the left and right direction in the front part of the case where there is no space.

[Brief explanation of the drawing]

The drawings illustrate the tape cartridge according to this invention, and FIG. 1 is an overall perspective view, FIG. 2 is a partially cutaway longitudinal side view, FIG. 3 is a plan view showing the internal structure, and FIG. 4 is a front view of the front lid. 5 to 7 show the pivot structure of the front lid and the closing locking means of the front lid, FIG. 5 is an enlarged plan view of the main part, and FIG. 6 is a sectional view taken along the line -- in FIG. 5. , FIG. 7 is a right side view with the front lid open. FIG. 8 is a partially cutaway right side view showing another embodiment of the present invention. 1...Cartridge case, 10...Front lid, 1
DESCRIPTION OF SYMBOLS 1... Front plate of front cover, 12, 13... Connecting piece of front cover, 14... Pivot, 15, 16... Left and right side walls of cartridge case, 15a, 16a... Front end recess, 19... Spring, 21... Gap, 22... Front cover closing locking means, 27... Locking tool, 33...
Spring means, 34... Engaging portion on front lid side, 35a, 3
5b...Lock release member, 36... Notch portion.

Claims (1)

[Scope of utility model registration request] A cartridge case 1 in which the front ends of left and right side walls 15 and 16 are recessed, and connecting pieces 12 and 13 are extended rearward from the left and right ends of a front plate 11 that closes the front surface of the case 1 between the left and right sides. Front lid 1
0, and the left and right side walls 1 of the cartridge case 1
The front lid 10 is attached to the front end concave portions 15a and 16a of 5 and 16.
In a tape cartridge, the left and right connecting pieces 12 and 13 are rotatably supported by the front plate 11 so that the front plate 11 can switch between a position where the front side of the case 1 is closed and an upwardly open position. A gap 21 is formed between the front end concave portion 16a of the case side wall 16 and the connecting piece 13 of the front lid 10 opposing thereto, and a locking tool 27 is provided on the cartridge case 1 side, with the front end side facing the gap 21. The locking device 27 is configured to be slidable back and forth between a front locking position and a rearward unlocking position, and the locking tool 27 is pressed and biased to the front locking position by the spring means 33 to close the connection of the front lid 10. An engaging part 34 is provided on the inner surface of the piece 13, and when not in use, the locking tool 27, which is pressed and biased to the front lock position, contacts and interferes with the engaging part 34 of the front lid 10 in the closed position. The lid 10 is prevented from rotating upward, and when loaded into the magnetic recording device, the lock release member on the magnetic recording device side locks the lock tool 27.
3. A tape cartridge characterized in that the locking tool 27 is slid backward toward the unlocked position at the rear where the locking tool 27 is disengaged from the engaging portion 34 by contacting a part of the tape cartridge.