JPH0697549B2 - Tape car ledge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tape cartridge provided with a hub lock member for stopping rotation of the tape winding hub when not in use, and the hub lock member is always in the lock position. It is characterized by how to mount the spring member that urges the movement.

[Conventional technology]

As shown in FIGS. 3 and 4, the hub 3 around which the tape 2 is wound is rotatably built in the main body case 1, and the hub lock member 21 for preventing rotation of the hub 3 in the main body case 1 is set at the rear lock position. It is mounted so that it can move back and forth across the unlocked position in the front, and has the hub lock member 21 and the main body case 1
A spring member 30 is laid between the spring member 30 and the spring member 30, and the hub lock member 21 is moved and biased by the spring member 30 to prevent the hub 3 from rotating when it is not in use. A tape cartridge of a basic form in which the hub lock member 21 moves to the front unlocked position in association with the movement and thereby releases the detent of the hub 3 is known, for example, from Japanese Utility Model Laid-Open No. 60-80575.

In such a hub lock means, conventionally, as shown in FIG. 5, a spring member 30 is generally composed of a torsion coil spring, and a support shaft 45 is erected on the upper surface of a horizontal plate portion 22 of the hub lock member 21.
The intermediate support portion 35 of the spring member 30 is fitted and inserted into the support shaft 45, and the free ends of the left and right arm portions 36, 36 extending from the intermediate support portion 35 are received by the main body case 1 side.

However, this type of spring member 30 exerts a spring action by the expansion and contraction deformation of the intermediate support portion 35. That is, as the hub lock member 21 moves from the rear lock position to the front lock release position, the spring force increases and the intermediate support portion 35 increases.
Shrinks. Therefore, the spring member 30 must be loosely fitted to the support shaft 45 in a free state so that the intermediate support portion 35 of the spring member 30 can be sufficiently reduced in diameter. Therefore, the spring arm
The intermediate support portion 35 cannot be securely and temporarily held by the hub lock member 21 until 36.36 is hooked on the main body case 1 side.
Assembling workability was poor, such as the spring member 30 jumping out of the hub lock member 21. In particular, before joining the upper and lower cases 1a and 1b constituting the main body case 1 in a lid-matching manner,
When the hub lock member 21 is first assembled on the inner surface of the upper case 1a via a plate 17 described later, the upper case 1a
Since the top and bottom of the hub lock member 21 are reversed and the spring member 30 is hung over between them, the work of mounting the spring member 30 is even more troublesome.

In this regard, in the above-mentioned Japanese Utility Model Laid-Open No. 60-80575, as shown in FIG. 6, a horizontal plate portion 22 of the hub lock member 21 is provided with an upper surface support plate portion 47 having a notch portion 46 higher than this. A lower surface support plate portion 48 having the same height as the horizontal plate portion 22 is formed to project at a position corresponding to the cutout portion 46, and a support shaft 48 is erected on the upper surface of the lower surface support plate portion 48. Then, the intermediate support portion 35 of the spring member 30.
Is loosely fitted into the support shaft 45 through the notch 46 from above, one of the left and right arm portions 36, 36 is connected to the upper surface support plate portion 47, and the other is connected to the lower surface. A form is disclosed in which the spring members 30 are temporarily held by the hub lock member 21 by being supported by the support plate portions 48, respectively.

[Problems to be solved by the invention]

However, in the above-described conventional temporary holding means for the spring member 30, when temporarily fixing the spring member 30 to the hub lock member 21, the operator grasps the arms 36, 36 in an approaching state and holds the intermediate support from above. The first step of inserting the part 35 into the support shaft 45 by using the notch 46, and opening the arms 36, 36 to the left and right to insert the arm 35 between the upper support plate 47 and the lower support plate 48 Two steps are required. Moreover, in order to prevent the intermediate support portion 35 from coming off the support shaft 45 when shifting from the first step to the second step, careful work is still required. Therefore, as a result, there is a danger that the temporary fixing work itself cannot be performed efficiently.

Further, in the assembled use state, for example, one arm portion 36 of the spring member 30 makes sliding contact with the upper surface support plate portion 47, so that the spring force of the left and right arm portions 36, 36 may become unbalanced.

[Object of the Invention]

The present invention has been proposed in order to solve the problems of the conventional example.

The object of the present invention is to provide a spring member 30 for the hub lock member 21.
It is an object of the present invention to provide a tape cartridge with good workability in assembling, in which the temporary fixing work can be performed easily and surely, and therefore the work of spanning the spring member 30 between the hub lock member 21 and the main body case 1 can be easily performed.

Another object of the present invention is to provide a tape cartridge in which the spring member 30 effectively acts on the hub lock member 21 to smoothly move the hub lock member 21 back and forth.

[Means for solving problems]

That is, the spring member 30 used in the present invention has an intermediate support portion 35 that expands and contracts, as represented by a torsion coil spring, and a pair of arm portions 36, 36 that extend from the intermediate support portion 35. The portion 35 is supported on the hub lock member 21 side,
The free ends of both arms 36, 36 are elastically received and supported on the main body case 1 side, respectively. Regarding this point, the conventional form is basically followed.

In addition, according to the present invention, as shown in FIGS. 1 and 2, for example, the hub lock member 21 (specifically, the horizontal plate portion 22) is replaced by the intermediate support portion 35 of the spring member 30 in place of the support shaft 45 of the conventional example. There is a hole 37 to be inserted and installed. Thus, the spring supports 39 and 40 projecting from the upper and lower ends of the inner circumference of the hole 37 toward the center of the hole 37 support the intermediate support portion 35 in a retaining manner, and lead to the hole 37 in this state. Opening 38
It is characterized in that the arm portions 36, 36 are led out to the outside of the arm 37 via.

[Action]

At this time, the arms 36, 36 of the spring member 30 are opened to reduce the diameter of the intermediate support portion 35, and the intermediate support portion 35 is inserted into the hole 37 and mounted. Next, when the spring member 30 is released, the intermediate support portion 35 expands.
Even in the maximum reduced diameter state of the
-It is held at 40 so that it does not come off even in the vertical direction. In this worn state, the arms 36
Since it is led out to the outside, the arms 36, 36 will be hung on the main body case 1 side later.

[Effect of device]

As described above, in the present invention, the expansion and contraction deformation of the intermediate support portion 35 of the spring member 30 is effectively utilized. When the intermediate support portion 35 is supported by the hub lock member 21, the intermediate support portion 35 is
Since 35 is in a reduced diameter state, it can be easily inserted and attached to the hole 37 on the hub lock member 21 side, and in this state, the intermediate support portion 35 of the spring member 30 can be firmly fixed in the vertical direction by the upper and lower spring bearings 39 and 40. It can be held in a retaining shape. Therefore, the hub lock member 21
On the other hand, the spring member 30 can be easily and reliably temporarily held. Moreover, the spring member 30 is such that when the intermediate support portion 35 is fitted in the hole 37, the entire arm portions 36, 36 are the opening portions.
Since it is led out to the outside of 38, the assembling work for hanging the arm portions 36, 36 on the main body case 1 side next can be performed well. Even when assembled and used, both arms 36 and 36 have hub lock members.
Since there is no abutting interference with a part of 21 as in the conventional example, the spring action is effectively exerted, and the reliability of the operation of the hub lock member 21 can be secured.

〔Example〕

3 and 4 show an example of a digital recording / reproducing system as an example of a tape cartridge to which the present invention is directed.

In the figure, 1 is a main body case. The body case 1 is made of plastic upper and lower cases 1a and 1b that are joined together with a lid to form a hub 3 around which the tape 2 is wound on the left and right sides.
Have three. These hubs 3 and 3 are free to rotate on the left and right drive shaft insertion holes 5 and 5 which are transparently provided on the lower case 1b side. The main body case 1 has guide members 6, 6 on the front left and right sides thereof, and a tape loading pocket 7 is recessed in the front surface of the main body case 1. Tape 2 is a guide member 6 ・ 6
It is led out from one hub 3 to the front surface of the case via and is wound around the other hub 3. Upper and lower walls 9 and 10 of the body case 1
Transparent liner sheets 11 and 12 are respectively interposed between the inner surface of the tape and the upper and lower edges of the tape 2, and the hub 3 and the tape 2 are slidably attached to the upper and lower liner sheets 11 and 12, respectively. Contact.

The upper wall 9 of the main body case 1 has a transparent window extending substantially right and left in the rear half thereof, and the transparent window and the upper liner sheet 11
Through, the amount of tape 2 wound around each hub 3 can be visually confirmed. This transparent window is configured by providing a window 15 through the case upper wall 9 and fitting and fixing the window plate portion 18 of the transparent plate 17 to the window 15 from the inner surface side.

A front cover 19 for covering the front surface of the main body case 1 in a non-use state is pivotally attached to the main body case 1 so as to be openable and closable, and is biased to a closed posture by a spring member (not shown). Lower wall of body case 1
A shutter 20 is attached to the outside of 10 so as to be slidable back and forth. Further, the plate 17 is positioned and fixed to the inner surface of the case upper wall 9 by ultrasonic welding or the like, and is provided between the case upper wall 9 and the body plate portion 17a of the plate 17 when not in use. A hub lock member (21) that abuts on and locks against the lock block (21) is horizontally movably mounted in the rear lock position and the front lock release position.

The hub lock member 21 has a horizontal plate portion 22 that is horizontally long,
It has a gate-like shape in which legs 23, 23 are integrally hung from the left and right ends thereof, and a horizontal plate 22 is mounted between the case upper wall 9 and the plate 17 so as to be movable back and forth. . In the assembled state, the lower end of each leg 23 is received and supported by the inner surface of the case lower wall 10 and contacts the inner surfaces of the left and right side walls of the main body case 1 to prevent the hublock member 21 from rattling in the vertical and horizontal directions. To do. Engaging pieces 25 from the left and right of the center of the horizontal plate 22
・ 25 are run backwards. Further, connecting arms 26 are forwardly extended from the lower ends of the leg portions 23, each connecting arm 26 is led to the outer surface of the front end portion of the left and right side walls of the main body case 1, and lock releasing claws 27 are formed at the front ends.

A spring member 30 is bridged between the horizontal plate portion 22 of the hub lock member 21 and the wall member (the rear wall of the pocket 7 in the figure) 29 on the side of the upper case 1a, so that the entire hub lock member 21 is locked rearward. Always biased into position.

In this case, when the tape cartridge is not in use, the front lid 19 covers and protects the outside of the front surface of the tape 2. The shutter 20 is slidably displaced forward by a spring member 31 shown in FIG. 4, closing the lower surface of the opening of the pocket 7 and also closing the drive shaft insertion holes 5, 5. The hub lock member 21 is moved to the rearward clock position by the spring member 30, and the engaging pieces 25, 25 extending from the horizontal plate portion 22 of the hub lock member 21 contact the upper end portions of both hubs 3, 3, respectively. Together, the hubs 3 are prevented from rotating.

When the tape cartridge is loaded into the deck, the shutter 20
Slides backwards against the spring member 31, which causes the pocket 7
The lower surface of and the lower surfaces of the drive shaft insertion holes 5, 5 are opened. Next, when the front lid 19 is rotated upward and rotated, the left and right connecting pieces 32, 32 of the front lid 19 are unlocked by the lock release claws 27, 32 on the hub lock member 21 side.
27 in abutment engagement with the hub lock member 21 so that the entire spring member 30
It moves to the front unlocked position against, and the lock is released by this, and the hubs 3, 3 are in a free rotation state.

The present invention is characterized in how the spring member 30 is attached to the hub lock member 21 in the tape cartridge of the basic form. Next, some of the embodiments will be described.

[Embodiment 1] FIGS. 1 and 2 show a first embodiment of a hub lock means according to the present invention.

The spring member 30 acting on the hub lock member 21 is composed of a torsion coil spring, and has a support portion (cylindrical coil portion) 35 in the middle, and a pair of left and right arm portions 36.
36 is a standard specification that is integrally extended in a cross-shaped manner toward the front.

In the hub lock member 21, a hole 37 is vertically penetratingly provided at the front end portion of the horizontal plate portion 22 at the center of the left and right. This hole 37 has a substantially circular shape with its front end opened in plan view. Symbols in the figure
38 shows the front end opening. Spring bearings 39 and 40 are provided at a total of three positions, namely, a rear upper end and left and right lower ends on the inner peripheral surface of the hole 37 so as to project toward the center of the hole 37. As described above, it is advantageous to change the phases of the spring receivers 39 and 40 in the vertical direction and to form the spring receivers 39 and 40 alternately so that an undercut does not occur when the hub lock member 21 is molded.

Thus, the inner diameter Di of the hole 37 is set to be smaller than the outer diameter Do of the intermediate support portion 35 in the free state of the spring member 30.

Now, when temporarily fixing the spring member 30 to the hub lock member 21, both arms 36, 36 are opened to the left and right so that the outer diameter Do of the intermediate support portion 35 is reduced, and this is shown in FIG. As shown, insert it into the hole 37 from diagonally above and insert the upper and lower spring supports 39
Inserting the intermediate support portion 35 between 40 to bring the arm portions 36, 36 forward through the opening 38 in a horizontal posture. With this, when the hand is released from the spring member 30, the intermediate support portion 35 automatically tries to expand the diameter to a free state, and the expansion force at that time causes this.
It elastically abuts the inner surface of the rod in a stretched state, and this reliably regulates the slip-out in the vertical direction. The arms 36, 36 led out to the front of the bonito 37 are held by the opening edges 38a, 38a of the narrow opening 38 at the base end thereof, so that the spring member 30 slips forward. Is certainly regulated.

In this way, the spring member 30 is attached to the horizontal plate portion 22 of the hub lock member 21.
After temporarily holding it in a horizontal position, the free ends of both arms 36, 36 are elastically deformed and abuttingly engaged with the wall member 29 on the inner surface of the upper case 1a as shown in FIG. . When the base end of the arm portion 36 is supported by the front end opening edges 38a and 38a protruding forward of the horizontal plate portion 22, the arm portion 36
The springiness of 36 can be maintained high.

In this embodiment I, spring supports 39 and 40 are provided above and below the hole 37.
When there is, the inner diameter Di of the hole 37 may be almost equal to the outer diameter Do of the intermediate support portion 35 in the free state of the spring member 30, and such an embodiment is also the scope of the present invention. That is, it is not essential that the expansion force of the intermediate support portion 35 makes elastic contact with the inner peripheral surface of the annulus 37.
・ Anything that does not come off in the vertical direction at 40 may be used.

[Other Embodiment Examples]

Although the whole of the illustrated example is as described above, the present invention is not limited thereto.

For example, the intermediate support portion 35 of the spring member 30 is preferably circular or semicircular, but may be U-shaped or V-shaped in a plan view. The planar shape of the 37 can also be changed in various ways.

In the main body case 1, the hub lock member 21 may be arranged on the rear side of the hub 3 so that the hub lock member 21 moves between the front lock position and the rear lock release position. Even when the horizontal plate portion 22 of the hub lock member 21 moves along the inner surface of the upper wall 9 of the main body case 1 as shown in the figure, both arms 36, 36 of the spring member 30 are connected to the wall member on the lower case 1b side. Can be taken to. The hub lock member 21 may move along the inner surface of the lower wall 10 of the main body case 1, and the shape and movement mode of the hub lock member 21 are not limited.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a plan view showing a hub lock member and a spring member which are constituent members of the present invention, and FIG. II-
FIG. 3 is a cross-sectional view taken along line II, FIG. 3 is an exploded perspective view of the constituent members of the tape cartridge of the present invention, and FIG. 4 is a plan view showing the entire internal structure thereof. FIG. 5 and FIG. 6 are perspective views of essential parts for explaining different conventional examples. 1 …… Main body case, 2 …… Tape, 3 …… Hub, 17 …… Plate, 19 …… Front lid, 21 …… Hablock member, 22 …… Hablock member horizontal plate, 30 …… Spring member , 35 ... Intermediate support part of spring member, 36 ... Arm part of spring member. 37 …… Ana, 38 …… Ana opening, 39,40 …… Spring bearing.

Claims (1)

[Claims] 1. A hub (3), around which a tape (2) is wound, is rotatably built in a body case (1), and the hub (3) is prevented from rotating when the hub is not used in the body case (1). The hub lock member (21) is movably mounted between a lock position and an unlock position, and a spring member (30) for biasing the hub lock member (21) toward the lock position is provided. The spring member (30) is supported on the hub lock member (21) side and expands and contracts, and the intermediate support part (35) is extended from the intermediate support part (35) so that the free end side of the main body case (35). 1) has an arm portion (36, 36) that can be received on the side, and a hub (37) is provided with a hole (37) into which the intermediate support portion (35) of the spring member (30) is inserted and attached. Being present, from the upper and lower ends of the inner circumference of the hole (37), The spring support (39, 40) protruding toward the center supports the intermediate support portion (35) in a retaining shape, and the spring member (through the opening (38) communicating with the hole (37). A tape cartridge characterized in that the arm portions (36, 36) of 30) are led out of the annulus (37).