JPS6350958A - Cassette loader - Google Patents

Abstract

PURPOSE:To ensure the loading motion of a cassette by reducing the backlash as far as possible with the minimum number of spur wheels used by utilizing the sliding member reciprocating linearly. CONSTITUTION:The power of a motor is transmitted to the rack part 5A of a sliding member 5 from a spur wheel 6 at the necessary time, the oblong holes 5C, 5D of the sliding member 5 are engaged movably in reciprocation linearly with the guide members 3A, 3B of a side plate 3, the sliding member 5 is thus moved linearly and its power is transmitted to the spur wheel 7A formed integrally to an arm 7 by the rack part 5B, and the arm 7 converts the linear movement of the sliding member 5 into a rotary movement. The rotary movement of the arm 7 makes the cassette holder 2 to perform a reciprocating movement between a 1st position and a 2nd position by the oblong hole 7B provided on the arm 7 and the cassette holder 2, projection part 2B engaging freely slidably therewith.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application Page 3 The present invention relates to a front-loading cassette loading device that can be used in magnetic recording and reproducing devices and the like.

BACKGROUND ART Conventionally, for example, a cassette mounting device for a video tape recorder (VTR) transmits the power of a motor to the cassette holder using a worm gear or multiple spur gears to drive the cassette holder that holds the cassette. Most of them did this.

Problems to be Solved by the Invention However, such a conventional structure requires a large number of parts, which increases costs and takes time to assemble, and the backlash of the gears accumulates, causing a lot of play in the cassette holder. It had the following problems.

In view of the above problems, the present invention utilizes a slide member that reciprocates linearly, thereby minimizing the number of spur gears used and minimizing backlash to ensure the mounting operation of the cassette. The present invention provides a cassette mounting device that is easy to assemble by providing first and second elongated holes in the member and first and second guide members in the side plate.

Means for Solving the Problems In order to solve the above-mentioned problems, the cassette mounting device of the present invention includes a cassette holder capable of removably holding a cassette, and a first position where the cassette can be mounted and removed. a pair of side plates for guiding the force center holder to be moved back and forth between a second position where the cassette can be recorded or played; The cassette holder driving means includes a slide member that linearly reciprocates by receiving power from a motor when necessary, and a linear movement of the slide member. The slide member includes a power transmission mechanism that converts the force into rotational motion and transmits the force to the center holder as a moving force, and the slide member is connected to one end of the first and second elongated holes and each of the elongated holes. one of the side plates has a first hole that is inserted into the first and 20th long holes of the slide member to guide linear movement of the slide member.
and a second guide member, and each of the first and second guide members has a width larger than the first and second elongated holes of the slide member, and , a slip-off preventing portion is provided which is smaller in size than the hole portion and is continuous with the elongated holes.

Function The present invention has the above-described configuration in which the power of the motor was transmitted to the cassette holder using a worm gear or a plurality of spur gears. To ensure the mounting operation of the cassette by minimizing the number of spur gears and minimizing backlash, and to provide first and 20th elongated holes in the slide member and first and second guide members in the side plate. The assembly can be made easier by using 6 pages.

EXAMPLE Hereinafter, a cassette loading device of the present invention will be explained with reference to the drawings.

FIG. 1 is an exploded view schematically showing a cassette mounting device according to an embodiment of the present invention. In FIG. 1, 1 is a cassette, 2 is a cassette holder that can detachably hold the cassette 1;
3 and 4 allow the cassette holder 2 to be moved back and forth between a first position where the cassette 1 can be attached and removed and a second position where the cassette 1 can be recorded or played back. It is a board on both sides that guides you. Reference numeral 6 denotes a slide member that linearly reciprocates when the rack portion 5A receives the power of the motor, and 6 is a spur gear that transmits the power of the motor to the rack portion 6A of the slide member 6. 7 is an arm that rotates together with a shaft 8 that is rotatably attached to both side plates 3 and 4;
It has a spur gear 7A that engages with a rack portion 5B provided on the shaft 8 and is located coaxially with the shaft 8, converting the linear movement 7 of the slide member 5 into rotational movement. Further, an elongated hole B that slidably engages with the protrusion 2B of the cassette holder 2 in the arm is provided, and the rotational force transmitted from the slide member 6 is transmitted to the cassette holder 2 as a moving force.

6C and 5Df'i, the width X provided on the slide member 6
One end of each of the first and second elongated holes has a hole portion having a width Y larger than the width X, which is formed continuously with each elongated hole. 3A and 3B are the first parts of the slide member 6.
and the second elongated holes 6C and 5D (7) with the first and second guide members having a width Z slightly smaller than the width X that guide the linear movement of the slide member 5. The tip portions of the second guide members 3A and 3B are provided with a hole portion that is larger than the width X of the first and second elongated holes 6C and 6D of the slide member 6, and that is continuous with the elongated holes. A retaining prevention portion smaller than width Y of is provided.

Reference numeral 9 denotes a plurality of frictional resistance reducing convex portions that separate the main surface portion of the slide member from the side plate with a small gap.

The operation of the cassette loading device constructed as described above will be explained below with reference to FIGS. 1, 2, and 3.

First, Figure 2 shows the state in which the cassette holder 2 is in the first position where the cassette 10 can be attached and removed, and Figure 3 shows the state in which the cassette 7) holder 2 is in the second position where the cassette 7) can be recorded or played back. It is something. However, in FIGS. 2 and 3, the cassette 1 installed in the cassette holder 2 is
It has been omitted to avoid cluttering the diagram. When necessary, the power of the motor is transmitted from the spur gear 6 to the rank portion 5A of the slide member 50, and the elongated holes 6C and 5D of the slide member 5 engage with the guide members 3A and 3B of the side plate 3 so as to be able to reciprocate linearly. As a result, the slide member 6 moves linearly, and the power is transmitted by the rack portion 5B to a spur gear 7A formed integrally with the arm 7, and the arm 7 converts the linear movement of the slide member 5 into a rotational movement. Convert to The rotational movement of the arm 7 is caused by the elongated hole 7B provided in the arm 7, the cassette holder 2 and the protrusion 2B which are slidably engaged with the elongated hole B9, and the cassette holder 2 is moved between the first position and the second position. Move back and forth between two positions.

Moreover, as shown in FIG. 1, the slide member 5 has its clear hole 5C.
The guide members 3A and 3B of the side plate 3 are inserted through holes having a width Y that are continuous with the holes 5D and 5D, but as shown in FIGS. During the movement, the guide members 3A and 3B are connected to the elongated holes 6C and 5D.
Because the width W of the retaining part provided at the tip of the guide members 3A and 3B is larger than the width X of the elongated holes 5C and 5D, ,
During the reciprocating movement between the first position and the second position, the slide member 5 does not come off the guide members 3A and 3B of the side plate 3.

As described above, according to this embodiment, by utilizing the linearly reciprocating slide member, the number of spur gears used is minimized, backlash is minimized, and the cassette mounting operation is ensured. and the first on the slide member.
and a second slot and side 10.

Assembly can be facilitated by providing the first and second guide members on the base plate.

In addition, in the above embodiment, the guide members 3A and 3B
is formed integrally with the side plate 3, but may be provided on the side plate 3 as a separate member.

Furthermore, although the plurality of frictional resistance reducing convex portions 9 are formed on the side plate 3, it is possible that they may be formed on the slide member 6 or both the side plate 3 and the slide member 5. It's not even a bad thing.

In addition, although the motor power is transmitted to the slide member 6 by the spur gear 6 and the rack portion 6A of the slide member 6, this is an example of a mechanism for transmitting the motor power to the slide member 6, and any other mechanism may be used. It is obvious that the slide member 6 may be moved by receiving power.

Effects of the Invention As described above, according to the present invention, the number of spur gears used can be minimized, backlash can be minimized, and the cassette mounting operation can be ensured and assembly can be facilitated. You can get this amazing effect.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a cassette loading device according to an embodiment of the present invention, FIG. 2 is a perspective view showing a first position where a cassette can be attached and removed, and FIG. FIG. 2 is a perspective view showing two positions. 1...Cassette, 2...Cassette holder, 3゜4...Side plate, 3A, 3B...Guide member, 5...Slide member, tsA, tsB・
... Rack part, 6C25D ... Long hole, 6.
...Spur gear, 7...Arm, 7A...
・Spur gear, 8...shaft, 9...convex part for reducing frictional resistance.

Claims (3)

[Claims] (1) A cassette holder capable of removably holding a cassette, and a first position where the cassette can be attached and detached, and a second position where the cassette can be recorded or played back.
and a cassette holder driving means for driving the cassette holder to bring the cassette holder from the first position to the second position and in the opposite direction. The cassette holder driving means includes a slide member that linearly reciprocates by receiving power from a motor when necessary, and converts the linear movement of the slide member into rotational movement and moves it to the cassette holder. The slide member includes a power transmission mechanism for transmitting force, and the slide member has first and second elongated holes and a hole continuously formed at one end of each of the elongated holes, and the sliding member has a is provided with first and second guide members that are inserted into first and second elongated holes of the slide member to guide the linear movement of the slide member, and the first and second guide members are provided with At the tip of each of the second guide members, there is a stopper that is larger than the width of the first and second elongated holes of the slide member and smaller than the size of the hole that is continuous with the elongated holes. A cassette loading device characterized in that a cassette loading device is provided with a section. (2) The cassette mounting device according to claim 1, wherein the first and second guide members having the retaining portion are integrally molded with the side plate from synthetic resin. (3) A plurality of frictional resistance reducing protrusions are integrally formed on at least one surface of the slide member and the side plate facing the slide member to separate the main surface of the slide member from the side plate with a small gap. A cassette mounting device according to claim 2, characterized in that: