JP2000242995A - Tape loading mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stable pressure contact mechanism which prevents the occurrence of the motion defect of a mechanism for bringing a loading post disposed in a tape loading device into pressurized contact even when the loading post stops on account of a certain fault during the movement thereof. SOLUTION: This tape loading device is so constituted that both ends of a pressure contact spring 13 are respectively spring hooked to the prescribed positions of a constituted drive gear 11 and drive arm 12 constitute in such a manner both can be assembled and disassembled after assembly of the drive gear 11 and the drive arm 12, by which the one end 13a of the pressure contact spring 13 is pressed to the projecting part 11a of the drive gear 11 and, therefore, the drive gear 11 does not rotate to the position where the assembly and disassembly are possible any more and the drive gear 11 and the drive arm 12 are not disassembled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading device in a magnetic recording / reproducing device, and more particularly to a tape loading device having a tape post bonding mechanism.

[0002]

2. Description of the Related Art Conventionally, in a tape loading device of a magnetic recording / reproducing device, two components are coaxially stacked on each other, and these two components are arranged around the axis of the two components. When one part is driven, the other part is driven by the biasing force of the connected spring, and the loading post is moved by the driving force of the other part. When stopped at a position where recording and reproduction are possible, a compression force is applied to the loading post by driving one extra component against the spring force disposed on the two components.

For example, a tape loading device described in Japanese Patent Application Laid-Open No. 3-127373 is a known means. This will be described below with reference to the drawings. FIG. 5 is a schematic plan view when a tape cassette is mounted, FIG. 6 is a schematic plan view at a position where magnetic recording and reproduction can be performed, FIG.
FIG. 8 is a plan view and a sectional view of a mechanism for pressing the loading post.

In FIG. 5, reference numeral 2 denotes a boat provided with a loading post, which moves from a position where a tape cassette is mounted to a position where magnetic recording and reproduction can be performed. Reference numeral 1 (indicated by a dashed line) denotes a base for moving the boat 2, and a loading groove 1 a for determining a moving path of the boat 2 is formed in the base 1. Reference numeral 3 denotes a drive arm A rotatably connected to the boat 2 by a shaft 2a. The other end is also rotatably connected to a drive arm B4 by a shaft 3a. That is, the boat 2, the drive arm A3, and the drive arm B4 are integrally connected. Reference numeral 5 denotes a drive gear to which power from a loading motor (not shown) serving as a drive source is transmitted, and freely rotates around a shaft 7 erected on a substrate (not shown). Reference numeral 6 denotes a compression spring for pressing the loading post.

Here, a method of assembling the drive arm B4, the drive gear 5, and the compression spring 6 will be described with reference to FIG. Slots 4a, 4a formed in the drive arm B4
After adjusting the protrusions 5a (hatched portion) and 5b (hatched portion) formed on the drive gear 5 to a position where the driving gear 5 can be inserted,
The drive gear 5 is rotated in the direction of the arrow 5A shown in the figure. Next, one end of the crimp spring 6 is hooked to the hook 4c of the drive arm B4, and the other end of the crimp spring 6 is hooked to the hook 5c of the drive gear 5. Stop it.

Further, the details of the operation after assembly will be described with reference to FIG. By the urging force of the compression spring 6, the upper left end portion of the elongated hole 4b of the drive arm B4 and the upper left end surface of the protrusion 5b of the drive gear 5 are maintained in contact with each other. "Abutment part" is indicated in FIG. 8). Further, after the drive gear 5 is inserted into the drive arm B4, the drive gear 5 is rotated in the arrow direction 7A shown in FIG. Not to be.

In the apparatus thus constructed, the driving gear 5 to which power is transmitted from a loading motor (not shown), which is a driving source, rotates in the arrow direction 5A shown in FIG. 5, that is, in the loading direction. , The drive arm B4 also rotates in the same direction due to the urging force of the compression spring 6, and the drive arm A3 is transmitted with power by the connecting portion 3a. Further, power is also transmitted to the boat 2 by the connecting portion 2a, and the boat 2 moves in the arrow direction 5B along the loading groove 1a, and finally, the magnetic recording shown in FIG. Stop at a position where playback is possible.

The drive gear 5 is set so that a torque larger than the urging force of the compression spring 6 is transmitted by a loading motor (not shown), so that the boat 2 can perform magnetic recording and reproduction. After stopping at a proper position, that is, even after the drive arm B4 integrally connected to the boat 2 stops, the drive gear 5 moves in the loading direction against the urging force of the compression spring 6. It becomes rotatable. Then, the loading motor is stopped from the state where the drive arm B4 and the drive gear 5 are in contact with each other so that the drive gear 5 stops at the position where the "constant gap" shown in FIG. . This constant gap serves as an index indicating the amount of displacement of the compression spring 6, that is, the force of pressing the boat 2.

Next, the movement from the position where magnetic recording and reproduction can be performed to the position where the tape cassette is mounted, that is, the movement in the unloading direction will be described.

In FIG. 6, when the loading motor (not shown) rotates in the direction opposite to the loading direction, the driving gear 5 also rotates in the direction opposite to the loading direction (in the unloading direction). The state in which B4 and the drive gear 5 have a “constant gap” shown in FIG. 6 returns to the state in which they are brought into contact with each other by the urging force of the compression spring 6 shown in FIG. Further, as the loading motor rotates in the unloading direction, the other parts shown in FIG. 6 also move in the unloading direction, and stop when the tape cassette shown in FIG. And the unloading operation ends.

[0011]

However, in the above-described tape loading apparatus, when the boat performs a normal operation, the drive arm B shown in FIG.
4 and the drive gear 5 do not separate beyond a certain gap,
When the boat 2 is abnormally stopped due to troubles such as foreign matter inclusion or partial damage of a mechanism while moving from the tape cassette mounting position to the magnetic recording / reproducing position, the boat 2 is moved from the loading motor as a driving source to the driving gear 5. Since the transmitted torque is sufficiently larger than the urging force of the compression spring 6, the positional relationship between the drive arm B4 and the drive gear 5 further departs from the "constant gap".
Will move to the positional relationship shown in FIG.
When the positional relationship between the drive arm B4 and the drive gear 5 moves to a position at which the drive arm B4 can be inserted, the minute projections 5d and 5e formed on the drive gear 5 for preventing thrust from coming off play no role. The gear 5 is slightly displaced in the thrust direction, and as shown in FIG. 4, an "interference part" is generated and the gear 5 does not return to the contact state, which causes a problem that the mechanism malfunctions.

[0012]

In order to solve the above-mentioned problems, a tape loading device according to the present invention locks a spring member whose both ends can be hooked and one end of the spring member. A drive gear provided with a hookable shape, and a hookable shape having the same rotation center as the rotation center of the drive gear and hooking the other end of the spring member is provided. A first position where the arm and the drive gear are urged in the axial circumferential direction by the spring force of the spring member, and the contact state between the two is maintained. Applying a rotational force to the drive gear so as to oppose the spring force of the spring member.
And a third position further away from the second position, which can be assembled and disassembled, and the arm and the drive gear In a state where both ends of the spring member are hooked at predetermined positions of the arm and the drive gear, the drive gear does not rotate to the third position, and the two cannot be disassembled. It is characterized by the following.

In the present invention, even if the boat stops moving due to some abnormality, the components constituting the crimping spring are not disassembled, and a crimping mechanism capable of always applying a stable crimping force to the boat. Can be obtained.

[0014]

A tape loading device according to a first aspect of the present invention has a spring member having both ends capable of being latched, and a shape capable of being latched to one end of the spring member. A driving gear provided, and an arm having the same rotation center as the rotation center of the driving gear, and having a hookable shape for locking the other end of the spring member, The arm and the drive gear are urged in the axial direction by the spring force of the spring member,
A first position in which the contact state between the two is maintained, and a second rotational force applied to the drive gear so as to oppose the spring force of the spring member. And further away from the second position,
A third position that can be assembled and disassembled, wherein the arm and the drive gear are in a state where both ends of the spring member are engaged with predetermined positions of the arm and the drive gear, respectively. The drive gear does not rotate to the third position and the two cannot be disassembled.
Therefore, even if the boat stops during movement due to some abnormality, the components constituting the compression spring are not disassembled, and the number and size of the components change. Thus, it is possible to obtain a crimping mechanism that can always provide a stable crimping force to the boat.

(Embodiment 1) Hereinafter, claim 1 of the present invention will be described.
Embodiment 1 of the present invention corresponding to FIG. 1 will be described with reference to FIGS. The method of driving the boat and the method of the pressure bonding means are the same as those in the conventional example, and the description thereof will be omitted. FIG. 1 is an exploded perspective view of a mechanism for crimping a boat in the tape loading device according to the first embodiment of the present invention.

In FIG. 1, a driving gear 11 receiving driving force from a loading motor (not shown), a boat 2
The method of engagement with the drive arm B12, which is integrally connected to the drive arm B12, is the same as that of the related art, and the respective phase matching portions are provided.
After the projection 11a and the hole 12a and the projection 11b and the hole 12b are aligned and inserted, the drive gear 11 is rotated in the arrow direction 1A shown in the figure. Thereafter, one end 13a of the crimp spring 13 is inserted from the upper surface of the hole 12a of the drive arm B12 and hooked on the lower surface of the drive arm B12,
Further, the other end portion 13c is displaced in the arrow direction 1B shown in the figure to be hooked on the spring hook portion 11c of the drive gear 11.

FIG. 2 is a perspective view showing an assembled product of the boat crimping mechanism configured as described above. In FIG. 2, the urging force of the compression spring 13 causes the driving gear 1 to move.
1 and the above-mentioned drive arm B12, the "contact portion" shown in FIG.
The driving gear 11 and the driving arm B12 are not disassembled in the thrust direction by the projections 11a and 11e formed on the driving gear 11.

In the boat crimping mechanism maintaining the abutting state as described above, while the boat 2 is moving from the tape cassette mounting position to the magnetic recording / reproducing position, foreign matter is mixed in, the mechanism is partially damaged, When an abnormal stop occurs due to troubles such as the above, the torque transmitted from the loading motor to the drive gear 11 is sufficiently larger than the urging force of the compression spring 13 as in the conventional example.
Even if the drive arm A3, which is integrally connected to the drive arm, stops, the drive gear 11 further rotates, and the drive gear 11 and the drive arm B12 separate from the contact state, and FIG. And finally stops at the position shown in FIG. 3.

FIG. 3 is a plan view and a cross-sectional view showing the "gap at the time of abnormality" in the mechanism for crimping the boat.

In FIG. 3, one end 13a of the compression spring 13 is spring-hung on the end of the hole 12a formed in the drive arm B12.
The protrusion 11a formed in the hole abuts on one end 13a of the compression spring 13, and the protrusion 11a
The drive gear 11 does not rotate to a position where the drive gear 11 can be inserted into a. Accordingly, the drive gear 11 does not shift in the thrust direction as in the related art.
Even if the boat 2 stops abnormally due to troubles such as mixing of foreign matter or partial damage of the mechanism, the driving gear 11
The drive arm B12 and the drive arm B12 are not disassembled, and return to the contact state by the urging force of the compression spring 13, so that malfunction of the mechanism does not occur.

[0021]

As described above, according to the tape loading device of the present invention, a spring member having both ends capable of being latched, and a shape capable of being latched to one end of the spring member. And a arm having the same rotation center as the rotation center of the drive gear, and having a hookable shape for locking the other end of the spring member. A first position in which the arm and the drive gear are urged in the axial direction by a spring force of the spring member, and a contact state between the two is maintained;
A rotational force is applied to the drive gear so as to oppose the spring force of the spring member. The two are further separated from the first position and the second position, and further separated from the second position. And a third position that can be assembled and disassembled, wherein the arm and the drive gear are in a state where both ends of the spring member are engaged with predetermined positions of the arm and the drive gear, respectively. Then, the drive gear is the third gear
, So that the loading post does not rotate and cannot be disassembled, so that the loading post can be assembled and disassembled even if the loading post stops abnormally for some reason during its movement. Both ends of the crimping spring for crimping the loading post to the driving gear and the driving arm are spring-hung at predetermined positions, so that the end of the crimping spring is at least one of the driving gear and the driving arm. And the drive gear does not rotate to a position where it can be assembled and disassembled, so that the drive gear and the drive arm do not disassemble,
It is possible to provide a tape loading device that can return to a normal position.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a crimping mechanism of a tape loading device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an assembled product of the crimping mechanism of the tape loading device according to the first embodiment.

FIG. 3 is a plan view and a cross-sectional view of a crimping mechanism of the tape loading device according to the first embodiment.

FIG. 4 is a plan view of a crimping mechanism of a conventional tape loading device.

FIG. 5 is a plan view showing a state in which a tape cassette is mounted in a conventional tape loading device.

FIG. 6 is a plan view showing a state during recording or reproduction of a conventional tape loading device.

FIG. 7 is a plan view showing an assembly position of a conventional tape loading device.

FIG. 8 is a plan view and a sectional view of a pressure bonding mechanism of a conventional tape loading device.

[Explanation of symbols]

 2 Boat 11 Drive gear 12 Drive arm B 13 Crimping spring

Claims (1)

[Claims] 1. A spring member having both ends capable of being latched, a drive gear provided with a latchable shape for latching with one end of the spring member, and a rotation center of the drive gear. An arm having the same center of rotation and having a hookable shape for hooking the other end of the spring member; and the arm and the drive gear are provided with a spring force of the spring member. Thereby, the two are urged in the axial direction, and a first position in which the two are kept in contact with each other, and a rotational force is applied to the drive gear so as to oppose the spring force of the spring member. The arm has a second position separated from the first position, and a third position further separated from the second position so that the two can be assembled and disassembled. And the drive gear are connected to both ends of the spring member by the arm In a state where the latch in the respective predetermined positions of the drive gear, said drive gear is not rotated until the third position mentioned above, in a state that can not degrade the both's tape loading apparatus, characterized in that.