JPS6336053B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cartridge featuring a fixing means for a reel presser plate spring.

For example, in a videotape cartridge, tape reels are rotatably mounted inside the main body case on the left and right sides, and each tape reel is pressed downward by a reel presser plate spring fixed to the top surface of the case. .

It has been proposed that this reel holding plate spring is approximately V-shaped in plan view so that it does not interfere as much as possible with the transparent window provided on the top of the case for viewing the amount of tape wound. In order to fix the spring to the top surface of the case, conventionally, a protrusion is provided on the top surface of the case, and a transparent hole in the center of the leaf spring is fitted into the protrusion to prevent it from coming off.
Since the leaf spring was fixed only at this one point, the leaf spring oscillated from side to side during assembly, making it extremely difficult to position it correctly.

As a solution to this problem, we installed two leaf springs on the top surface of the case.
It is conceivable to support the leaf spring at a point, but the problem in this case is that as tape cartridges become smaller, it is difficult to add one more leaf spring support boss due to space constraints. It is in.

Focusing on this fact, the present invention utilizes the existing upper and lower case fastening bosses, and inserts transparent holes in two locations in the center of the leaf spring into the boss and a retaining protrusion provided near the boss. The purpose is to improve assembly workability by supporting the leaf spring at two points and fixing it to the top surface of the case so that it does not come off, as well as simplifying the assembly structure of the leaf spring. do.

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 main body case. The main body case 1 is made by screwing together upper and lower plastic cases 1a and 1b with their lids mating.
Tape reel 3 on which tape 2 is wound inside left and right,
It has 3. Tape reels 3 and 3 are main body case 1
The left and right drive shaft insertion holes 5, 5 are transparently provided in the bottom wall 4 of the
The center of rotation is pressed down by a reel presser plate spring 7 fixed to the inner surface of the upper wall 6 of the upper case 1a, and when the main case 1 is loaded into the magnetic recording device, the magnetic recording device is driven. The shaft fits into the hub hole 8 of each reel 3 through each insertion hole 5 . Tape guide members 9, 9 are provided on the front left and right sides of the main body case 1, and the tape 2 is led out from one reel 3 to the front of the case via these guide members 9, 9, and wound onto the other reel 3. The tape guide member 9 is formed in a semi-cylindrical shape, and the tape 2 is guided and travels in contact with the arcuate outer circumferential surface of the tape guide member 9. The upper wall 6 of the upper case 1a is provided with horizontally elongated transparent windows 10, through which the amount of tape wound on each tape reel 3 can be visually confirmed from the outside.

In Fig. 2, the upper and lower cases 1a and 1b have two locations P ₁ and P ₂ on the left and right at the front, and two locations P 3 on the left and right at the rear.
Screws are fastened at a total of five locations, including P4 and one location _P5 in the center, which will be described later. Of these, the front screw fastening points P ₁ and P ₂ have perfect circular and oval reference holes 11 and 12 recessed in the lower surface of the case bottom wall 4, and the rear screw fastening points P ₃ and P ₄ Similarly, perfect circular and oval reference holes 13 and 14 are recessed in the same manner.

In Fig. 4, each screw fastening point P ₁ at the front,
P ₂ has a screw pilot hole 15 from the inner surface of the case upper wall 6.
A cylindrical boss 16 is vertically provided below the dividing line, a boss 17 is installed from the case bottom wall 4 at a height that reaches the dividing line, and a screw communicating with the reference hole 12 or 11 is installed in the boss 17. Insertion hole 1
8 is transparently provided opposite to the screw pilot hole 15, and the reference hole 12
Or insert the tapping screw 19 from 11 into the insertion hole 1.
8 and screwed into the screw holes 15, respectively.

In addition, at the rear left and right screw fastening points P ₃ and P ₄ , as shown in FIG.
A boss 21 having a screw pilot hole 20 is provided vertically from the bottom, a screw insertion hole 22 communicating with the reference hole 13 or 14 is provided in the lower case 1b, and a tapping screw 19 is inserted into the insertion hole 22 from the reference hole 13 or 14. They are inserted through and screwed into the pre-screw holes 20, respectively.

A tape protective front cover 23 for closing the front of the main body case 1 is pivotally attached to the main body case 1 so that it can be opened and closed. In FIGS. 1 and 2, this front lid 23
A front plate 24 that closes the front surface of the main body case 1 between the left and right sides, connecting pieces 25, 25 extending rearward from both left and right ends of the front plate 24, and connecting pieces 25, 25.
It is a plastic molded product having pivots 26, 26 protruding from the inner surface of the left and right connecting pieces 2 in opposite directions.
5 and 25 are externally fitted into the front end recesses 29 and 30 of the left and right side walls 27 and 27 of the main body case 1, and the pivot shafts 26 and 26
are fitted and pivoted into pivot holes 31, 31 on the side walls of the case (see Fig. 5), and the front of the main body case 1 can be freely rotated around this pivot 26 between a closed position and an upwardly opened position. It is rotatably biased to the closed position by a torsion spring 32 attached to the pivot shaft 26 on the right side in the figure. Front cover 2 when the tape cartridge is not in use
3 is closed and covers and protects the front outside of the tape 2. When the tape cartridge is loaded into the magnetic recording device, the front lid 23 opens and the main body case 1 is opened.
A tape loading pin on the magnetic recording device side enters a pocket 28 formed on the front surface of the case to pull out the tape 2 to the front of the case.

The aforementioned torsion spring 32 is provided in the gap 33 between the front end concave portion 30 of the right side wall 27 of the main body case 1 and the right side connecting piece 25 of the front cover 23, and the front cover 23 is closed to the closed position when the tape cartridge is not in use. Locking means are assembled. In FIG. 6, torsion spring 3
2, an intermediate coil portion 32a is fitted onto the pivot shaft 26, one end 32b is engaged and supported in a vertical groove 34 provided on the outer surface of the front end recessed portion 30 of the case right side wall 27, and the other end 32c is inserted into the front end recess 30 of the case right side wall 27. It is received and supported by a spring receiver 36 provided inside the right side connecting piece 25 of the lid 23.

5 and 6 illustrate the closing locking means of the front lid 23, and the gap 33 is defined by the stepped inclined surface 30a of the front end recessed portion 30 in a plan view, and the front side is closer to the rear side than the stepped slope 30a of the front end recessed part 30. It is formed wide,
A locking tool 35 is installed in this gap 33.

The locking tool 35 is attached to the horizontal shaft 3 from the left and right sides of the head 37.
6 and 36 are extended, and front and rear legs 38 and 39 and a leaf spring piece 40 are integrally extended downward from the head 37, and are engaged with the lower end of the front leg 38. A surface 41 is formed and the rear leg 39
The front surface of the lower end portion of the lock member is formed as a receiving surface 42 of a lock release member, which will be described later.

The locking tool 35 is assembled to the lower case 1b before the upper case 1a is attached to the lower case 1b. That is, the horizontal shaft 36 is attached to the bearing portions 43, 43, which are formed opposite to each other at the upper end of the lower case side of the front extension portion 27a of the case right side wall 27 and the front end recessed portion 30.
36 is dropped from above, hung and supported so as to be swingable in the front and back direction, and is pressed forward by a leaf spring piece 40. This leaf spring piece 40 has a gap 3
The free end comes into contact with a spring receiving wall 44 located at the rear end of the locking member 3, thereby pressing the entire locking member forward.

An engaged surface 4 is provided on the inner surface of the right side connecting piece 25 of the front lid 23.
5 and a rounded guide surface 46 is provided in a protruding manner. The engaged surface 45 of the engaged protrusion 47 of the front lid 23 when the lower end engaging surface 41 of the front leg portion 38 is in the closed position in the forward swing biased state.
The arrangement is such that it goes around from below and abuts against and engages with the body.

That is, when the tape cartridge is not in use, the engaging surface 41 of the locking tool 35, which is pressed forward by the leaf spring piece 40, wraps around from below onto the engaged surface 45 of the front lid 23 in the closed position. It is in elastic contact. However, the engaging surface 41 of the locking tool 35 is set so as to come into surface contact with the engaged surface 45 in a state substantially perpendicular to the rotation locus P of the engaged surface 45 when the front cover 23 is opened and rotated. Therefore, the front cover 23 is surely locked from rotating upwardly around the pivot 26 when not in use. When the tape cartridge is inserted and loaded into the elevating table of the magnetic recording device, the lock release member 48 fixed to the elevating table is relatively guided from the front and passes through the notch formed at the lower end of the front plate 24 of the front cover 23. 49 into the gap 33 and presses the lower end receiving surface 42 of the leg 39 on the rear side of the locking device 35. As a result, the locking tool 35 swings backward against the leaf spring piece 40 as shown by the dashed line in FIG. It deviates below the rotation trajectory P of 45,
The closing lock of the front lid 23 is released. Next, when the lifting platform on the magnetic recording device side is pushed down, the fixing lever (not shown) on the magnetic recording device side comes into contact with the notch 49 of the front lid 23, and the front lid 23 opens upward. move. This closing lid lock is released by the lock release member 48.
Instead of inserting the lock release member 48 from the front, the lock release member 48 whose upper end surface is formed as an inclined surface is inserted from the lower surface side of the opening of the gap 33, and its upper end surface is inserted into the locking tool 35.
The locking member 35 may be swung rearward by contacting the lower corner of the receiving surface 42 of the rear leg 39. Alternatively, the locking member 48 may be guided from the lateral outer side to swing the locking tool 35 backward to the unlocking position.

Then, once the operation in the magnetic recording device is finished,
The lock release member 48 and the fixed lever retract to the position when not in use, the locking tool 35 is pushed forward and swung by the spring pressure of the leaf spring piece 40, and is returned to the closed lid position by the torsion spring 32. Front lid 2
The engaging surface 41 of the locking tool 35 is brought into contact with and guided by the rounded guide surface 46 on the third side, and the engaging surface 41 engages with the engaged surface 45 of the engaged protrusion 47 at the same time as the closing of the lid is completed. Lock the front lid 23. At this time, if the spring pressure of the leaf spring piece 40 is too strong, the locking tool 35 moves past the locking position at high speed, and the engaged protrusion 47
However, in the case of the illustrated locking device 35, the leaf spring piece 40 is made of a plastic material with a loose elasticity, and the point of action is near the fulcrum. This setting is suitable for obtaining an appropriate spring pressure.

The lock release member 48 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 33 through the notch 49 without any trouble. If you try to load the tape cartridge into the magnetic recording device in the wrong orientation (front-to-back or upside-down), the lock release member 48 will contact and interfere with other parts of the tape cartridge, resulting in incorrect loading of the tape cartridge. prevent.

Pocket 2 for the tape loading pin
8 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, 9 has its front outer side covered with the front lid 23 when not in use. Although the pocket 28 is covered, it is contaminated by dust that enters from the lower surface and the upper surface of the opening of the pocket 28, so this must be prevented. Therefore, as shown in FIGS. 2 and 4, a dust cover 50 is swingably supported on the inside of the front lid 23 at the location where the pocket 28 is present, and the dust cover 50 is used to hold the tape 2 when not in use.
The inner side including the lower side of the pocket 28 and the upper surface of the opening of the pocket 28 are sealed to prevent dust from adhering to the tape 2. This dust cover 50 has 28 pockets.
The dust cover 50 is connected to cam grooves 51, 51 provided on the left and right sides of the front cover 23, and when the front cover 23 is opened, the dust cover 50 also opens the front cover 23 without interfering with the tape 2 at all.
move upwards with.

7 and 8, a reel brake means 5 is located at the rear left and right center portion of the main body case 1.
3 is included. That is, a plastic reel stopper 54 is guided by left and right guides 55 upright from the case bottom wall 4 and is mounted on the inner surface of the case bottom wall 4 at the corresponding part so as to be slidable forward and backward. The reel stopper 54 has a block-shaped sliding part 56 and brake pieces 57, 57 cantilevered from the left and right sides of the front end of the sliding part 56, and a spring receiving part provided at the rear end of the sliding part 56. 58 and the rear side wall 59 of the case, and is urged forward by a compression spring 60 interposed between the tape reel 58 and the rear side wall 59 of the case.
The forward sliding limit is restricted by contact, and the pressing rib 62 hanging down from the inner surface of the case upper wall 6 restricts lifting by contact. A receiving hole 63 is formed in the center of the sliding portion 56 in a vertically penetrating manner, and correspondingly, a longitudinally long operation hole 64 is provided in the bottom wall 4 of the case. It always faces the operation hole 64 in the front and rear sliding range.

Next, to explain the operation of the reel brake means 53, when the tape cartridge is not in use, the reel stopper 54 is urged forward by a spring 60, and the tips 57 of the left and right brake pieces 57, 57
a, 57a are urged to rotate toward the left and right tape reels 3, 3 by their own elasticity. Each tape reel 3 has serrated engagement teeth 6 on the outer periphery of the lower flange 3a.
5 are continuously formed, and the tip 57a of each brake piece 57 follows the free movement of each tape reel 3 and always engages with its engagement teeth 65, so that each tape reel 3 is aligned in the tape feeding direction x. prevent it from rotating. Then, each brake piece 5 is pushed forward by the force of the spring 60 that pushes the reel stopper 54 forward.
7 always moves each tape reel 3 in the tape winding direction y
This acts to rotate the tape, thereby preventing the tape from loosening.

When the tape cartridge is loaded into the magnetic recording device, the reel stopper 54 is slid backward to the rear brake release position by the brake release member on the magnetic recording device side against the spring 60. There are two ways to do this. One is to fix a plate-shaped brake release member 67 having an inclined surface 66 at the tip on the magnetic recording device side in FIG. 8, insert the tape cartridge into the mounting base of the magnetic recording device, and push down the mounting base. Then, the release member 67 is inserted into the operation hole 64.
Receive hole 6 of reel stopper 54 relatively through
3, the tip inclined surface 66 comes into contact with the lower end hole periphery of the receiving hole 63, thereby causing the reel stopper 54 to slide backward. In this case, each tape reel 3 is already in a free rotation state before the tape loading pin on the magnetic recording device side is inserted into the pocket 28, so there is a risk that the tape may become loose before the tape is pulled out. There is. Therefore, another method is to provide a round pin-shaped brake release member 68 on the magnetic recording device side, as shown in FIG. The release member 68 is engaged with the receiving hole 63 of the reel stopper 54 through the operation hole 64, and the release member 68 is moved rearward in conjunction with the tape pulling operation using the tape loading pin. This is a method in which the reel stopper 54 is slid backward. In this case, the reel brake is activated until just before the tape is pulled out, which is effective in preventing the tape from loosening, and the operation hole 64 is formed long in the front and back so that it can be applied to such a system.

In FIGS. 2 and 11, the case bottom wall 4
A total of five pairs of tape type detection holes 70 are provided at the rear of the upper wall 6, two in the left corner facing each other vertically, and three in the right corner. is closed by a circular lid 72 via a ring-shaped thin walled portion 71. When the tape cartridge is loaded into the magnetic recording device by selectively pushing these lids 72 into the case with fingers or a jig and tearing out the ring-shaped thin wall portion 71 to open the necessary detection holes 70. , the built-in tape type is automatically detected by optical or mechanical contact with a detector on the magnetic recording device side corresponding to each detection hole 70. For example, the first detection hole 70
The second to fourth detection holes 70 are used to detect the tape length, and the fifth detection hole 70 is used to detect the tape thickness.

Each tape type detection hole 70 is installed vertically in the case in order to block the optical influence of the detection light passing through the hole 70 on other parts of the case or adjacent detection holes 70. A compartment 74 is formed by the partition wall 73 .

Erroneous erasure prevention means 76 is assembled at the rear left corner of the main body case 1. Figures 9 to 13
In the figure, a horizontally long rectangular opening 77 along the case rear side wall 59 is located at the rear end of the case bottom wall 4.
A rectangular window 78 is transparently provided at a position on the right side of the opening 77 in the rear side wall 59 of the case. In front of this window 78, a guide wall 79 is erected parallel to the front side of the opening 77. The upper end surface of the guide wall 79 is set lower than the lower side of the window 78, and the rear side wall 5 of the case is located at two places on the left and right.
V-shaped vertical grooves 80, 80 facing 9 are cut. Circular holes 81, 81 are formed through the left end portions of the case bottom wall 4 and the case top wall 6 so as to be vertically opposed to each other. The slide piece 83 is assembled into the guide groove 82 formed between the case rear side wall 59 and the guide wall 79. The slide piece 83 has a vertical plate part 85 having a rectangular window 84 in the center, and a horizontal plate part 86 cantilevered forward at the lower left end of the vertical plate part 85. The plate portion 85 is a plastic molded product having a hemispherical locking protrusion 89 projecting from the lower right side of the front surface, and this slide piece 83 is assembled into the lower case 1b before the upper case 1a is attached. That is, when the slide piece 83 is inserted into the groove 82 from above and fitted, the locking protrusion 89 abuts and engages with the vertical groove (locking groove) 80 on the left side of the guide wall 79, so that the slide piece 83 Movement to the left and right is prevented. In this state, when the upper case 1a is put on and fastened and fixed, the left rib 90 of the left and right presser ribs 90, 90 hanging from the rear wall of the upper case 1a prevents the upper case from coming off upwardly. Further left and right ribs 9
A rib 91 with a T-shaped cross section, which is also provided vertically from the upper case side at the middle part of the slide piece 83, prevents the slide piece 83 from wobbling forward. It is supported so as to be slidable in the left and right direction.

Then, the slide piece 83 is stably switched and held in two positions on the left and right sides of the opening 77 due to the abutting and riding-over engagement between the locking protrusion 89 and the locking grooves 80, 80.

The operation knob 87 of the slide piece 83 is connected to the opening 7
7, the lower circular hole 81 is closed by the horizontal plate part 86, and the window 78 on the rear side wall 59 of the case is in an open state. When the operating knob 87 is located to the right of the opening 77, the circular hole 81 is switched to the open state by the movement of the horizontal plate part 86, and the window 78 is closed by the vertical plate part 85. Even under this switching state, the slide piece 83 is prevented from coming off upward by the presser rib 90 on the right side.

The operating knob 87 will be slid into two positions in the opening 77 from below the opening 77 by placing a finger on the lower surface of the knob 87. When the slide piece 83 is located to the left of the opening 77, it is generally set to an erasable state. Therefore, when the slide piece 83 is located to the right of the opening 77, it is in an erasable state. If the slide piece 83 is painted in a different color from that of the main body case 1, for example, a red color, it is possible to determine at a glance whether erasing is possible or not by visually observing the window 78 from the outside of the case.

When the tape cartridge is loaded into the magnetic recording device, the detector on the magnetic recording device side is inserted into the upper and lower circular holes 8.
1,81', usually corresponding to the lower one,
When the erasing is possible, the detector moves to slide piece 8.
It is detected that the built-in tape 2 can be erased by contacting and interfering with the lower surface of the tape 3. When in the non-erasable state, the detector contacts the bottom surface of the slide piece 83 and is inserted into the case through the circular hole 81 on the bottom wall of the case without interfering, and the built-in tape 2 is now set to be non-erasable. Automatically detect. The erasable state or non-erasable state may be detected optically, and in that case, either side of the upper and lower circular holes 81, 81' may be used.

In FIG. 2, the outer surface of the rear side wall 59 of the case is recessed with a constant vertical width between the left and right sides, and an index label 93 having a writing field for the user is affixed to this recessed portion 92. Therefore, the window 78 is formed adjacent to the left side of the recessed portion 92, and the user can check whether the target tape cartridge is currently in the erasable state while looking at the index label 93. Whether or not the slide piece 83 is in the non-erasable state can be determined from the rear side depending on whether or not the rear end surface of the slide piece 83 is recognized in the window 78.

In addition, in FIGS. 1 and 14, a label pasting part 94 is also recessed on the top surface of the main body case 1, and the trademark name, product name, tape performance, etc. are displayed on this pasting part 94. A label 95 is attached.

2 and 14, when the tape cartridge is loaded into the magnetic recording device, the tape 2
In order to optically detect the starting and ending ends of the tape, a through hole 9 for detecting the end of the tape is provided in the front center of the bottom wall 4 of the case.
6, and through holes 97, 97 are formed in the front end recessed portions 29, 30 of the left and right case side walls 27, 27 so as to penetrate inside and outside. Around the through hole 96, a cylindrical wall 98, which surrounds the through hole 96 and has a semi-cylindrical rear part 98a and a square cylinder shape as a front half 98b, is provided upright from the lower case 1b side.
This cylindrical wall 98 is set to a height such that the rear cylindrical portion 98a almost reaches the case inner top surface 6a from the bottom surface of the case, and rectangular notches are provided on the left and right sides of the square cylindrical portion 98b. Guide walls 99, 99 that match the square tube portion 98b are installed on the upper side of the case 1.
The upper and lower cases 1a,
1b, the lower surfaces of the guide walls 99, 99 cover the upper surfaces of the notches, and the rectangular windows 100, 10
form 0.

When the tape cartridge is not in use and the front cover 23 is closed, the connecting pieces 25, 25 close the outside of the through holes 97, 97 to prevent dust from entering inside, and the tape cartridge is loaded into a magnetic recording device. Front cover 23
When the is opened, the outside of the through holes 97, 97 are opened through the notches provided in the connecting pieces 25, 25, and the lamp 101 on the magnetic recording device side is inserted into the cylindrical wall 98 through the through hole 96, and from the lamp 101. The light of the rectangular window 100,
100 and through the transparent leader tape portion connected to both ends of the tape 2, through the left and right through holes 9.
The light is received by a sensor on the magnetic recording device side via 7 and 97. At this time, the light emitted from the lamp 101 is passed through the rectangular window 1 by the cylindrical wall 98 and the guide wall 99.
00 and 100 are shielded, it is well prevented that scattered light will pass through other parts of the case, especially the transparent window 10, and reach the magnetic recording device, causing malfunctions. For this tape end detection, detection light from the magnetic recording device side is projected into the main body case from the left and right outside of the main body case 1 through through holes 97, 97, and the tape is inserted into the cylindrical wall 98 through the through hole 96. The projection detection light may be received by a sensor on the magnetic recording device side.

The aforementioned screw fastening point _P5 at the left and right center of the case is set adjacent to the rear part of the wall 98. 1st
4 and 15, at the central screw fastening point _P5 , a cylindrical boss 104 with a screw pilot hole 103 is hung from the case inner top surface 6a until it reaches the dividing line, and is inserted from the case bottom wall 4. A boss 105 is erected at a height that reaches the dividing line, and a screw insertion hole 107 communicating with the boss hole 106 is provided in the upper wall of the boss 105 facing the screw pilot hole 103. Tapping screw 19
is inserted through the insertion hole 107 and screwed into the pre-screw hole 103.

The fastening boss 104 on the upper case 1a side is connected to the cylindrical wall 98.
The front wall of the fastening boss 105 on the lower case 1b side serves as the rear end wall of the cylindrical portion 98a.

Now, a reel presser plate spring 7 is fixed to the case inner top surface 6a, and the present invention is characterized by a means for fixing the plate spring 7 to the case inner top surface 6a.

In FIGS. 14 to 16, the reel presser plate spring 7 is a stamped and molded product of a copper plate, and has a substantially V-shape in plan view, with its center base end 7a located above the case inner top surface 6a. The free end portions 7b, 7b are fixedly fixed to the left and right center portions near the front end, and the free ends 7b, 7b abut each other from above on the protrusions 109, 109 planted on the upper surface of the rotation center of each reel 3, 3, thereby reeling each reel. 3 is always pressed down and energized.

The base end 7a of the leaf spring 7 has both free ends 7b, 7b.
The branch base 7c is formed protrudingly in the front and has a rectangular shape, and triangular guide protrusions 110, 110 are protrusively formed on the left and right sides of the front end, and a connecting hole 1 is formed in the center.
11 is bored, and a fitting hole 112 is bored in the center of the branch base 7c located behind the connecting hole 111. That is, the connecting hole 111 and the fitting hole 112 are arranged in a line in the front and rear in the center of the leaf spring 7.

A cylindrical portion 98a of a cylindrical wall 98 is provided on the inner top surface 6a of the case.
A retaining projection 113 that fits into the connecting hole 111 is protruded at a position concentric with the center of curvature of the projection 113. After the connecting hole 111 is fitted into the connecting hole 113, the projection 1
The head of 13 is melted using ultrasonic waves or the like, and the leaf spring 7 is caulked to the inner top surface 6a of the case.

This leaf spring 7 is assembled and fixed to the inner top surface 6a of the case before the upper and lower cases 1a, 1b are fastened together.
If the leaf spring 7 is assembled at an angle shifted to the left and right during this assembly, the free ends 7b, 7b will not come into proper contact with the protrusion 109 of each reel 3, or will come off the protrusion 109. It becomes useless. Therefore, in order to easily and reliably perform this positioning, in this proposal, the screw fastening point P ₅ is located at the center of the left and right of the case.
Using the fastening boss 104 on the upper case 1a side, the retaining protrusion 113 is used when assembling the leaf spring 7.
At the same time, the boss 10 is fitted into the connecting hole 111.
4 is fitted into the fitting hole 112, and by fitting and supporting at these two points, the positional fluctuation of the leaf spring 7 is eliminated.

That is, when assembling the leaf spring 7, the upper case 1a is placed in a position with the inner top surface 6a of the case facing upward.
When guiding the leaf spring 7 from above to the case inner top surface 6a, the fitting hole 112 of the leaf spring branch base 7c is guided.
loosely fit into the fastening boss 104 on the upper case 1a side, and the left and right guide protrusions 110, 11 of the leaf spring base end 7a
0 in contact with the inner surfaces of the opposing guide walls 99, 99, the connecting hole 111 will fit smoothly into the retaining protrusion 113, and this will prevent the leaf spring 7 from moving forward, backward, left or right. The assembly position is automatically determined.

Next, after the leaf spring 7 is caulked with the retaining protrusion 113 by ultrasonic welding in the front and rear directions, when the upper case 1a is stood upright and fastened to the lower case 1b, the branch base 7c of the leaf spring 7 is Cylinder wall second half cylindrical part 9
The leaf spring 7 is received and supported by the upper end surface of the leaf spring 7, and the entire surface of the base end 7a and the branch base 7c is in close contact with the case inner top surface 6a without floating downwardly, and the leaf spring 7 has the desired shape at both free ends 7b, 7b. This will apply spring pressure.

When assembling this manually, hold either the left or right free end 7b of the leaf spring 7 and
2 into the fastening boss 104, and the guide protrusion 11
It is convenient to simply bring the springs 0 and 110 into guide contact with the guide walls 99 and 99 and lower them, but this is particularly convenient when automatically assembling the leaf spring 7 by holding it with an assembly jig. That is, if the leaf spring 7 is set directly above the assembly position on the case inner top surface 6a, and the left and right sides 114, 114 of the base end 7a are held by the jig and lowered directly below, the Left and right sides 11
4, 114 and the left and right guide walls 99, 99 can be used as an insertion space for the jig, and the plate spring 7 is supported at two points to prevent rotation, so that the assembly position is automatically adjusted. This is because it can be regulated.

In addition, in the above embodiment, the guide walls 99, 99 vertically provided from the upper case 1a side are eliminated, and instead, the front half corner cylindrical portion 98b of the cylindrical wall 98 vertically provided from the lower case 1b side is raised to a height reaching the case inner top surface 6a. When assembling the leaf spring 7, first open the fitting hole 11.
2 is loosely fitted into the fastening boss 104 and lowered, and from the middle, the connecting hole 111 is inserted into the retaining protrusion 11.
3 may be fitted.

Alternatively, the leaf spring 7 may be made of plastic. Also, the boss 104 on the upper case 1a side
Needless to say, this may be a boss having a screw insertion hole 107, and the boss 105 on the lower case 1b side may be a boss having a screw pilot hole 103.

Further, it is also possible to prevent the leaf spring 7 from slipping out by simply making a cut in the periphery of the connecting hole 111 and pushing the connecting hole 111 into the locking protrusion 113.

As explained above, according to the present invention, the retaining protrusion 1 is provided in the vicinity of the upper and lower case fastening bosses 104 that protrude downward from the inner top surface 6a of the main body case 1.
13 is provided in the center of the reel presser plate spring 7, and a connecting hole 1 is fitted into the retaining protrusion 113 to prevent it from coming off.
11 and fitting holes 112 that fit into the upper and lower case fastening bosses 104 are transparently provided, and when the leaf spring 7 is assembled, the holes 111 and 112 are connected to the corresponding bosses 104.
By fitting into the protrusion 113 and guiding the leaf spring 7 into the top surface 6a side of the case, the leaf spring 7 can be fixed at the two locations without shifting, so that the leaf spring 7 can be positioned at the time of assembly. can be easily and reliably carried out, and both free ends 7b, 7b of the leaf spring 7 can always be brought into correct contact with the reel rotation center,
Assembling workability can be expected to be improved.

In addition, in order to position and support the leaf spring 7 at two points, one of them is attached to the existing upper and lower case fastening boss 1.
04, the structure can be simplified, which is particularly advantageous in small-sized tape cartridges.

[Brief explanation of the drawing]

The drawings illustrate the tape cartridge according to the present invention, and FIG. 1 is an overall perspective view, FIG. 2 is a plan view showing the internal structure, FIG. 3 is a cross-sectional view taken along the line -- in FIG. The figure is a sectional view taken along the line -- in FIG. 5 and 6 show the front cover closing locking means, FIG. 5 is a plan view, and FIG.
The figure is a sectional view taken along the line -- in FIG. 7th
8 and 8 illustrate the reel brake means, with FIG. 7 being a plan view and FIG. 8 being a sectional view taken along the line -- in FIG. 9 to 13 illustrate the erroneous erasure prevention means, FIG. 9 is a plan view, FIG. 10 is a cross-sectional view taken along the line -- in FIG.
Figure 11 is a sectional view taken along the line XI-XI in Figure 9.
2 is a sectional view taken along the line XII--XII in FIG. 9, and FIG. 13 is a perspective view. 14 to 16 show the assembly structure of the reel presser plate spring, FIG. 14 is a cross-sectional view taken along the line - in FIG. 2, FIG. 15 is a cross-sectional view taken along the line - in FIG. 14, and FIG.
The figure is a perspective view. 1...Main case, 1a...Upper case, 1b...
... lower case, 2 ... tape, 3 ... tape reel, 6 ... case upper wall, 6a ... case inner top surface,
7... Reel presser plate spring, 7a... Proximal end of reel presser plate spring, 7b... Free end of reel presser plate spring, 7c... Branch base of reel presser plate spring, 1
04...Boss for fastening the upper and lower cases, 113...Protrusion for preventing removal, 111...Connecting hole, 112...Fitting hole.

Claims (1)

[Claims] 1. Tape reels 3, 3 on which tape 2 is wound are installed on the left and right sides of the main body case 1, which is formed by fastening the upper and lower cases 1a and 1b together, and the upper case 1a
The center portion of a reel presser plate spring 7, which is approximately V-shaped in plan view, is fixed to the inner top surface 6a of
In the tape cartridge which is pressed down and biased, a retaining protrusion 113 is provided protruding near the upper and lower case fastening bosses 104 protruding downward from the inner top surface 6a of the case, and A tape cartridge characterized in that a connecting hole 111 that is fitted to a retaining protrusion 113 and a fitting hole 112 that is fitted to an upper and lower case fastening boss 104 are transparently formed.