JP2527974Y2 - Tape cassette loading device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette loading device of a magnetic recording / reproducing device using a tape cassette such as a video tape recorder or an audio tape recorder, and particularly, the cassette storage table is provided. When moving from the first position, which is the tape cassette attaching / detaching position, to the second position, which is the recording / reproducing position, when an external force that prevents the movement is received, a moving mechanism of the cassette storage table and The present invention is characterized by a configuration for preventing damage to an object to which an external force is applied.

2. Description of the Related Art A conventional tape cassette loading device will be described with reference to the drawings. FIG. 4 is an exploded perspective view of the tape cassette loading device, and FIG. 5 is a side view thereof.

In the drawing, reference numeral 8 denotes a cassette storage table having an opening on one side thereof, into which the tape cassette 14 can be inserted and removed. When the tape cassette 14 is inserted in the direction of arrow A into the cassette accommodating table 8 located at the first position, which is the mounting / detaching position of the tape cassette, and the leading edge 14a of the tape cassette 14 reaches the switch mounting portion 8a, the tape cassette 14 is provided there. Switch 12
Is pressed. With this switch 12, the lead wire 12a
A signal for rotating the motor 2 as a drive source is forwarded to the control box 11 through the control box 11 and 12b, and a drive current is transmitted from the control box 11 to the motor 2 through the leads 17a and 17b. Then, the driving force of the motor 2 rotates the first driving gear 3a and the second driving gear 3b coaxially fixed thereto through the worm gear 2a directly connected thereto. The driving force of these driving means causes the sliding gear 16 which is the transmitting means engaged with the second driving gear 3b to slide in the direction of arrow B.

By the way, the elevator mechanism 7, which is a means for supporting the cassette storage table 8, is provided with a pair of support arms 7a and 7b on both sides of the base 1, and the support arms 7a and 7b It is rotatably connected at the center and both ends are configured as follows. That is, the pin 7c provided at one end of the support arm 7a is slidably engaged with the elongated hole 8b provided at the cassette housing 8. The other end of the support arm 7a is fixed to a support shaft 13 rotatably supported on the end 1a of the base 1, and the support arms 7a are rotated on both sides of the base 1 in synchronization with each other. And an engagement hole 7d formed at the end thereof.
Is rotatably engaged with the convex portion 5 formed on the sliding gear 16. Also, the support arm 7b
At one end, the cassette accommodating table 8 is rotatably engaged with a pin 7e, and at the other end, a sliding pin 7f provided therein is slidably engaged with the elongated hole 1b of the base 1. Is configured.

In the tape cassette loading device configured as described above, when the tape cassette 14 is inserted into a proper position of the cassette storage table 8 and the switch 12 is pressed, the driving unit is a sliding gear as a transmission unit. 16 to arrow B
In this direction, and with this movement, a counterclockwise turning force is generated in the support arm 7a. Accordingly, the elevator mechanism 7 is lowered in the direction of arrow C, and the cassette storage table 8 is engaged with the reel table (not shown) from the first position where the tape cassette 14 can be inserted or removed.
It is moved to the second position where recording and reproduction are possible.

In addition, when the tape cassette 14 is moved from the first position to the second position without mounting the tape cassette 14 on the cassette storage table 8, or the cassette storage table 8 is returned from the second position to the first position. Although not shown, for example, the motor 2 is driven by a switch provided on the exterior panel 10, for example.

However, in the conventional tape cassette loading apparatus configured as described above, the tape cassette 14 is not mounted on the cassette accommodating table 8 and the second position is set from the first position.
When an object, for example, a human hand is erroneously inserted into the opening for insertion and removal of the tape cassette 14 when the tape cassette 14 is moved to the position shown in FIG. In some cases, the movement of the cassette storage table 8 was hindered. At this time, since the rotating power of the motor 2 is transmitted to the non-slidable sliding gear 4 and the non-descent elevator mechanism 7, the excessive force is applied to destroy the mechanism, or the hand 2 There has been a problem that the security against an object that has been subjected to an external force that prevents the movement of the cassette housing 8 is low.

Means for Solving the Problems In order to solve the above problems, the tape cassette loading device of the present invention has the following configuration. That is, the cassette storage table and the cassette storage table are movably supported in the vertical direction between a first position where the tape cassette is attached / detached and a second position where the recording / reproducing position is located below the first position. An elevator mechanism, which is mechanically coupled to the elevator mechanism, drives the elevator mechanism with reversible sliding movement, and reversibly moves the cassette storage table between the first position and the second position. A second sliding member, a first sliding member reversibly slidable in parallel with the second sliding member, the first sliding member and the second sliding member.
The cassette storage base is moved from the first position to the second position by the elastic force.
A spring body set so that the first sliding member and the second sliding member come into contact with each other with a pressing force slightly higher than a transmission force required to move the first sliding member to the first sliding position. A second drive gear meshing with the moving member and slidingly moving the first sliding member with rotation; a first drive gear coaxially fixed to the second drive gear; A worm gear for transmitting a driving force for moving the first sliding member to the first driving gear; and a driving source directly connected to the worm gear. With the movement in the direction, the second sliding member is moved in the first direction via the spring body, and the elevator mechanism is driven by the movement of the second sliding member to accommodate the cassette. Lower the table toward the second position, and move the base to the second side of the first sliding member. With the movement of the cassette, the second sliding member is pressed to move the second sliding member integrally in the second direction, and the elevator mechanism is driven in accordance with the movement to drive the cassette. This is a configuration in which the storage table is raised toward the first position.

According to such a configuration, when the cassette storage table is erroneously put between the opening and the hand during the movement from the first position to the second position, the unreasonable driving force of the driving means is reduced. Since the force is absorbed by the extension of the spring body, a transmission force higher than the spring pressure is not applied to the cassette storage table, and it is possible to prevent the support means and the mechanism such as the first transmission means and the second transmission means from being destroyed. As much as possible, the safety is ensured without damaging the hands. Also, after the tape cassette storage has been loaded into a position where recording and reproduction can be performed, the motor is further continued to rotate and the motor is stopped after the spring body is extended, so that the cassette storage is used as the base. In this case, the relative position between the tape cassette and the reel base can be stabilized without being affected by variations in the dimensions of the first and second sliding gears and the elevator mechanism.

Embodiment Next, an embodiment of the present invention will be described. FIG. 1 is an exploded perspective view of a tape cassette loading device according to an embodiment of the present invention, FIG. 2 is a side view of the tape cassette loading device, and FIG. 3 is a cassette storage table of the tape cassette loading device. FIG. 6 is a side view showing a state in which a hand is held between the openings during the movement. The same components as those of the conventional tape cassette loading apparatus are denoted by the same reference numerals, and description thereof will be omitted.
A description will be given below of a portion different from the conventional configuration.

Conventionally, the second drive gear 3b and the elevator mechanism 7 are connected by a single point member as a sliding gear 16, and the driving force of the motor 2 is transmitted to the cassette housing 8. 16 is connected to a first sliding gear 4 as a first transmitting means,
And the second sliding gear 5 which is the transmission means. Then, as shown in FIG. 1 and FIG.
The bent portion 4b provided on the sliding gear 4 and the second sliding gear 5
The spring body 6 is set such that the convex portion 5c provided on the spring member 6 is elastically brought into contact with a pressing force slightly higher than a transmission force necessary for moving the cassette storage table 8 from the first position to the second position.
With the hole 4a provided in the first sliding gear 4 and the second sliding gear 5
In the hole 5a. In the second sliding gear 5, an engaging pin 1c provided on one side surface of the base 1 is slidably inserted into an engaging hole 5b provided therein. It is configured to slide and move in parallel.

The operation of the tape cassette loading device thus configured will be described below.

First, at the time of normal movement of the cassette storage table 8 from the first position to the second position or from the second position to the first position, the bent portion 4b and the convex portion 5c are moved by the spring body 6. The first sliding gear 4 and the second sliding gear 4
Slide gear 5 operates as if it is an integral body.

Now, as shown in FIG. 3, it is assumed that a human hand is erroneously inserted into the opening of the cassette accommodating table 8 in which the tape cassette 14 is not inserted while moving in the direction of arrow C. At this time, since the human hand 15 is sandwiched between the upper plate 9 and the exterior panel 10, the cassette storage table 8 cannot move any more in the C direction, and the second sliding gear 5, the elevator mechanism 7, and the cassette The storage table 8 stops. On the other hand, since the motor 2, the first drive gear 3a, and the second drive gear 3b continue to rotate, the first sliding gear 4 is driven by the cassette irrespective of the human hand 15 being pinched. After the storage base 8 has moved in the direction B by the stroke required for normal operation of moving from the first position to the second position, it stops together with the motor 2, the first drive gear 3a, and the second drive gear 3b. As described above, the unreasonable driving force of the motor 2 generated by the external force that tries to prevent the movement of the cassette storage table 8 by the hand or the like is caused by the first sliding gear 4 and the second sliding gear 4.
A difference occurs in the movement stroke of the sliding gear 5 and the spring body 6 elastically engaging between the two is absorbed by being extended, so that the first sliding gear 4 and the second sliding gear 5 are absorbed. 5
Can prevent the mechanism from being destroyed without loss of integrity. Further, since a force higher than the spring pressure at the time of extension of the spring body 6 is not applied to the hand 15 of the person sandwiched therebetween, the hand 15 is safe.

However, when an abnormal situation occurs in which the hand 15 is pinched while the cassette storage table 8 is moving in the direction C, the cassette storage table 8 stops in the middle of the movement, so that the cassette storage table 8 moves to the second position. Will be permanently impossible. Therefore, as shown in FIG. 1, when the cassette storage table 8 reaches the second position, the cassette storage table 8 is pressed against its lower surface, and the control box 11 sends a signal indicating that the cassette storage table 8 has reached the second position. A detection switch 18 for transmitting information is provided on the upper surface of the base 1. Then, the cassette storage table 8 is moved from the first position to the second position.
Within a set time slightly longer than the time required to move to the position
When the signal is not input to the control box 11 through the control boxes 18a and 18b, the motor 2 is reversed and the cassette
Is returned to the first position.

Also, a cassette storage table 8 on which the tape cassette 14 is mounted.
After reaching the second position, the cassette 2 is pressed against the base 1 by continuing rotation of the motor 2 and stopping the motor 2 after extending the spring body 6 by an arbitrary length. In this case, since the cassette storage table 8 is always in close contact with the base 1, the first
The relative position between the tape cassette and the reel base can be stabilized without being affected by variations in the dimensions of the sliding gear 4, the second sliding gear 5, and the elevator mechanism 7 as the support means.

As described above, according to the present invention, the transmitting means is divided into the first transmitting means and the second transmitting means, and the two are elastically engaged with each other by the spring body, so that the cassette can be stored. Even if the movement is stopped while the table is moving, the excessive force of the driving means can be absorbed in the mechanism, preventing the mechanism from being destroyed and being sandwiched between the upper plate and the exterior panel. Since a force higher than the stretching force is not applied to the hand or the like, safety can be maintained. Further, since the tape cassette storage table can be securely brought into close contact with the base by the drive motor and the spring body, the tape cassette storage table is not affected by variations in dimensions of the first and second sliding gears and the elevator mechanism. And the relative position of the reel base can be stabilized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a tape cassette loading device according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a side view showing the operation thereof, and FIG. FIG. 5 is an exploded perspective view, and FIG. 1. Base, 2 Motor, 3a First drive gear, 3b
... A second drive gear, 4... A first sliding gear, 5... A second sliding gear, 6... A spring body, 7.
8 ... cassette storage stand, 9 ... upper plate, 10 ... exterior panel, 14 ... tape cassette, 16 ... sliding gear, 18 ... detection switch.

Claims (1)

(57) [Scope of request for utility model registration] 1. A cassette holder (8), and the cassette holder (8) is positioned between a first position where a tape cassette is attached / detached and a second position which is a recording / reproducing position below the tape cassette. Mechanism (7) for movably supporting the cassette in a vertical direction, and mechanically connected to the elevator mechanism (7) to drive the elevator mechanism (7) with reversible sliding movement, and The storage table (8) is connected to the first
A second reversible movement between the first position and the second position.
A sliding member (5), a first sliding member (4) slidably and reversibly movable in parallel with the second sliding member (5), and the first sliding member (4). ) And the second sliding member (5), the elastic force of which moves the cassette storage table (8) from the first position to the second position. A spring body (6) set so that the first sliding member (4) and the second sliding member (5) come into contact with each other with a pressing force slightly higher than a necessary transmission force; A second driving gear (3b) that meshes with the first sliding member (4) and slides the first sliding member (4) with rotation, and is coaxial with the second driving gear (3b). The first driving gear (3a) fixed to the first and the driving force for moving the first sliding member (4) are applied to the first driving gear (3a).
a) a driving source (2) directly connected to a worm gear (2a) that transmits the worm gear (2a) to the first sliding member (4) in a first direction as the worm gear (2a) rotates. With the movement, the second sliding member (5) is moved in the first direction via the spring body (6), and the elevator mechanism is moved with the movement of the second sliding member (5). (7) is driven to lower the cassette storage table (8) toward the second position, and the second slide member (4) moves in the second direction as the first slide member (4) moves in the second direction. By pressing the sliding member (5), the second sliding member (5) is moved integrally in the second direction, and the elevator mechanism (7) is driven by the movement to accommodate the cassette. A tape cassette loading device, wherein the table (8) is raised toward the first position.