JP2998543B2 - Sliding plate guide pin device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding plate guide pin device for guiding a sliding plate in parallel with a substrate for use in a magnetic recording / reproducing apparatus or the like.

[0002]

2. Description of the Related Art FIG. 7 shows an audio cassette used in a magnetic recording / reproducing apparatus (including a reproduction-only apparatus) mounted on a vehicle. In FIG. 7, 1 is the main body of the cassette,
2A and 2B are reels rotatably supported in the main body 1, and the magnetic tape 3 is wound around the reels 2A and 2B. 4A and 4B are holes for positioning the cassette formed near the front surface of the main body 1, and 5A and 5B are holes for inserting the capstan shaft.

FIG. 8 shows a main part of a magnetic recording / reproducing apparatus for a vehicle. 8, reference numerals 7A and 7B denote cassette guide members which are supported on the bent side surface of the substrate 6 so as to be vertically movable, and the cassette shown in FIG.
It is inserted horizontally by being guided by 7B. When the cassette is guided by the cassette guide members 7A and 7B and inserted to a predetermined position, the plunger 8 is operated, and the driving force of the plunger 8 drives the cassette guide members 7A and 7B to drive the cassette guide members 7A and 7B. 7B descends so as to approach the substrate 6, and moves the cassette to the recording / reproducing position. 9
A and 9B are cassette positioning pins fixed to the substrate 6 by caulking. 10A and 10B are capstan shafts rotatably supported on the substrate 6, and 11 is a sliding plate slidably supported on the substrate 6. The sliding plate 11 has a magnetic head 12 attached thereto.
Is held. 13A and 13B are reel drive shafts. The reel drive shafts 13A and 13B are engaged with the reels 2A and 2B in the cassette, and rotate the reels 2A and 2B by the rotational driving force of the motor 14.

In FIG. 8, cassette guide members 7A, 7
When the cassette inserted into the cassette B reaches a predetermined position, the plunger 8 is actuated, and the cassette guide members 7A and 7B are lowered by the driving force of the plunger 8, and the cassette is positioned in the cassette positioning holes 4A and 4B. Pin 9
A, 9B are inserted, capstan shafts 10A, 10B are inserted into holes 5A, 5B of the cassette, and reel drive shafts 13A, 13B are inserted into reels 2A, 2B of the cassette.
B engages. When the cassette is transferred to the recording / reproducing position by the cassette loading mechanism in this manner, the sliding plate 11 slides, the magnetic head 12 comes into contact with the magnetic tape of the cassette, and the rotation driving force of the motor 14 drives the reel drive shaft. 13A and 13B rotate, and the reel drive shaft 13
The reels 2A and 2B engaged with the reels A and 13B rotate, and a reproducing operation or a recording operation is performed.

FIG. 9 shows a guide pin for guiding the sliding plate 11 slidably. In FIG. 9, reference numeral 15 denotes a guide pin. The guide pin 15 includes an upper cylindrical portion a, a large-diameter cylindrical portion b, and a lower cylindrical portion c. Grooves 16 are formed. As shown in FIG. 10, the lower end of the guide pin 15 is inserted into a hole 18 formed in the substrate 6 and is fixed by caulking. In FIG. 10, reference numeral 11 denotes a sliding plate, and a long hole 17 formed in the sliding plate 11 is inserted into the guide pin 15, and the sliding plate 11 is
It is slidably supported by. The sliding plate 11 is fitted with the E pin fitted into the groove 16 of the guide pin 15.
It is retained by the ring 19.

As described above, the guide pin 15 used in the conventional magnetic recording / reproducing apparatus is inserted into the hole 18 of the substrate 6 and is fixed by caulking. It has to be manufactured separately and requires a man-hour to attach the guide pins 15 to the substrate 6, and there is a problem that the assembling work is complicated.

[0007]

As described above, the guide pin 15 used in the conventional magnetic recording / reproducing apparatus is
As shown in FIG. 9, a separately processed guide pin 15 is inserted into the hole 18 of the substrate 6 and is fixed by crimping, so that the number of mounting steps is large and the assembling work is complicated. .

The present invention has been made to solve the above-mentioned conventional problems, and provides a sliding plate guide pin device which can be easily assembled.

[0009]

According to the present invention, in order to achieve the above object, a part of a substrate of a magnetic recording / reproducing apparatus is squeezed, and a cylindrical guide pin is integrally formed on the substrate. And the sliding plate is slidably supported.

According to a second aspect of the present invention, a parallel groove is formed in the outer peripheral surface of a cylindrical guide pin, an E-ring is fitted into the parallel groove, and the guide pin is slidably supported by the guide pin. The sliding plate is prevented from falling off by the E-ring.

[0011]

According to the present invention, a part of the substrate of the magnetic recording / reproducing apparatus is squeezed out and a cylindrical guide pin is formed integrally with the substrate. As described above, after the separately manufactured guide pin is inserted into the hole of the board, there is no need to perform an additional caulking operation, so that the number of assembling steps can be reduced and the configuration can be made inexpensively. According to the second aspect of the present invention,
Since a groove parallel to the outer peripheral surface of the cylindrical guide pin formed integrally with the substrate is formed, by fitting an E-ring into this groove, the sliding supported by the guide pin is slidable. The plate can be prevented from coming off from the guide pins.

[0012]

1 to 5 show an embodiment of the present invention.
It will be explained together. FIG. 1 shows a substrate 20 of a magnetic recording / reproducing apparatus equipped with a sliding plate guide pin device of the present invention. In FIG. 1, reference numeral 21 denotes a guide pin formed integrally with the substrate 20, and the guide pin 21 is formed by squeezing a part of the substrate 20. 2 to 4 are a top view, a side view, and a perspective view, respectively, of the guide pin 21. The guide pin 21 is formed of a small-diameter cylindrical portion 21A and a large-diameter cylindrical portion 21B, and has a small-diameter cylindrical portion 21A. Are formed with two parallel grooves 22A and 22B. FIG. 5 shows an E-ring 23 in grooves 22A and 22B of guide pin 21.
Are shown in a state of fitting. As shown in FIG. 5, both ends of the E-ring 23 abut against parallel bottom surfaces of the grooves 22A and 22B, and the central projection of the E-ring 23
The E-ring 23 is in contact with the outer peripheral surface of A, and is held by the small-diameter cylindrical portion 21A by the clamping force of the two front ends. In FIG. 5, reference numeral 24 denotes a long hole formed in the sliding plate 11,
The elongated hole 24 of the sliding plate 11 is inserted into the small-diameter cylindrical portion 21A of the guide pin 21 and is slidably supported. The width of the elongated hole 24 of the sliding plate 11 is
The cylindrical portion 2 having a larger diameter and a larger diameter than the small diameter cylindrical portion 21A.
It is smaller than the diameter of 1B.

FIGS. 6A to 6E show a process of forming guide pins 21 by squeezing the substrate 20. FIG. FIG. 6A shows the substrate 20. This substrate 20
As shown in FIG. 6B, a predetermined portion of
By pressing, the projections 26 are formed on the substrate 20. Next, as shown in FIG. 6 (C), by pressing a mold 28 having a concave portion 27 from the front side, the convex portion 26 is processed into a cylindrical shape. By this processing, a small-diameter cylindrical portion 21A of the guide pin 21 is formed. Next, as shown in FIG. 6D, a mold 31 having a large-diameter concave portion 29 and a small-diameter concave portion 30 is formed.
By clamping the small-diameter cylindrical portion 21A with the mold 32, the lower portion of the small-diameter cylindrical portion 21A is enlarged to form a large-diameter cylindrical portion 21B. Next, as shown in FIG. 6 (E), dies 34A, 34B having protruding pieces 33A, 33B formed at the distal end.
The grooves 22A and 22B are formed on the left and right outer peripheral surfaces of the small-diameter cylindrical portion 21A by sandwiching the cylindrical portions 21A and 21B between the molds 24A and 24B. In FIG. 6E, the mold 35 disposed on the upper part is
This is for preventing the upper surface of the cylindrical portion 21A from protruding upward when the cylindrical portions 21A, 21B are sandwiched between A and 35B. The guide pins 21 are formed by squeezing the substrate 20 as described above.

The above embodiment is an example in which the slide plate 11 is slidably supported only by the guide pins 21. To prevent the slide plate 11 from slipping out of the guide pins 21, The guide pins 21 are formed with grooves 22A and 22B for holding the retaining E-rings.
If other members for preventing the guide pins 21 from coming off from the guide pins 21 are provided, the guide pins 21 are provided with grooves 22A and 22B.
Need not be formed.

[0015]

According to the present invention, since the guide pins are formed integrally with a part of the substrate by squeezing, there is no need to separately manufacture guide pins as in the conventional example. In addition, there is an advantage that the step of attaching the guide pins to the substrate is not required. Further, according to the second aspect of the present invention, since a groove parallel to the outer peripheral surface of the guide pin is formed, the E-ring can be easily held on the guide pin by using the groove, and the E-ring can be used. There is an advantage that the slide plate slidably supported by the guide pins can be prevented from coming off.

[Brief description of the drawings]

FIG. 1 is a plan view of a substrate provided with a sliding plate guide pin device according to an embodiment of the present invention.

FIG. 2 is a top view of the guide pin of the embodiment.

FIG. 3 is a side view of the guide pin of the embodiment.

FIG. 4 is a perspective view of a guide pin according to the embodiment.

FIG. 5 is a top view showing a state where the sliding plate is supported by the guide pins of the embodiment.

FIGS. 6A to 6E are views showing a manufacturing process of the guide pin of the embodiment.

FIG. 7 is a plan view of the cassette.

FIG. 8 is a perspective view of a part of a conventional magnetic recording / reproducing apparatus.

FIG. 9 is a front view of a conventional guide pin.

FIG. 10 is a front view showing a state in which a conventional guide pin is mounted on a substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cassette main body 2A, 2B reel 3 Magnetic tape 20 Substrate 21 Guide pin 21A Small-diameter cylindrical part 21B Large-diameter cylindrical part 22A, 22B Groove 23 E-ring 24 Slot

Continuation of the front page (72) Inventor Kazuo Hatsumi 3-1, Tsunashima Higashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (72) Inventor Takashi Ichihara 4-chome Tsunashima-higashi, Kohoku-ku, Yokohama, Kanagawa Prefecture 3-1 Matsushita Communication Industrial Co., Ltd. (72) Inventor Hiroki Kobayashi 3-1 Tsunashima Higashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Matsushita Communication Industrial Co., Ltd. (58) Field surveyed (Int.Cl. ⁷ , (DB name) G11B 33/12 313 G11B 15/10 541 G11B 15/26

Claims (3)

(57) [Claims] A sliding plate formed by squeezing a part of a substrate of a magnetic recording / reproducing apparatus, integrally forming a cylindrical guide pin on the substrate, and slidably supporting the sliding plate with the guide pin. Guide pin device. 2. The slide plate guide pin according to claim 1, wherein a guide pin having a small-diameter cylindrical portion formed on the distal end side and a large-diameter cylindrical portion formed on the substrate side is formed integrally with the substrate. apparatus. 3. A sliding plate, which is formed with a groove parallel to the outer peripheral surface of the small-diameter cylindrical portion, an E-ring is fitted into the groove, and is slidably supported by the small-diameter cylindrical portion. 3. The sliding plate guide pin device according to claim 2, wherein the sliding plate guide pin device is retained by an E-ring.