JPH0548296Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a guide device for linearly guiding a moving object, such as a reading head for a compact disc player.

(Prior Art) A reading head of a compact disk player or the like is linearly fed in the radial direction of the disk, and this linear guidance is often performed by a guide shaft. For example, two guide shafts are arranged in parallel, and one guide shaft is used as an original linear guide, and the other guide shaft is used as a rotation stopper. By the way, in order to fix this guide shaft to a base plate, conventionally, a structure has been adopted in which the guide shaft is held down with a presser metal fitting and fixed with screws, or a structure in which a thread is cut in the guide shaft and the guide shaft is fixed using a nut.

(Problems to be Solved by the Invention) For this reason, the conventional device described above has the problem of requiring a large number of man-hours for processing and assembly. Another problem is that the unit cost of parts increases.

This idea was created in view of this problem.
The purpose is to realize a guide device that can reduce the number of man-hours for processing and assembly, can reduce the unit cost of parts, is compact, can be repeatedly attached and detached, and has durability.

(Means for Solving the Problems) The present invention for solving the problems described above includes a guide shaft that linearly guides a moving object, and a first penetration through which an end of the guide shaft is inserted into a side wall surface. a base plate with a hole bored therein; and a metal flat presser plate that is provided so as to be movable in the front and back direction along the side wall surface of the base plate and that presses the guide shaft against the wall surface of the first through hole. A guide device comprising: a second through hole formed in a horizontal portion of the side of the base plate; and a long hole provided in the center portion of the holding plate extending in the front-back direction; a spring portion formed at the bottom of the elongated hole and urging the presser plate upward; and a projection provided at the bottom of the spring portion that abuts the upper surface of the horizontal portion of the base plate and curves the spring portion upward. a protrusion that engages with the second through hole for positioning; and a protrusion that slides into substantially lower part of the guide shaft at least during its movement;
The present invention is characterized in that an inclined portion is formed to bring a substantially upper portion of the guide shaft into contact with a wall surface of the first through hole of the base plate.

(Function) In the guide device of the present invention, the inclined portion of the presser plate brings the substantially upper part of the guide shaft into contact with the wall surface of the first through hole of the base plate, and the spring portion urges the presser plate upward. Press the guide shaft against the wall of the first through hole.

(Example) Hereinafter, an example of the present invention will be described in detail using FIGS. 1 to 7. In these figures, reference numeral 1 denotes a base plate that supports guide shafts 2 and 3 that guide non-moving objects in a straight line.
The side portions 4 and 5 are bent. Since the shapes of the side parts 4 and 5 are symmetrical, only the side part 4 will be described in the following explanation. Said side part 4
In the horizontal part near the wall surface, there are guide holes 4a into which the lower protrusions 6a and 6b of the flat metal presser plate 6 whose detailed shape is shown in FIG. 5 are fitted, respectively.
4b are bored, and the lower part of the presser plate 6 is guided only in the lateral direction in FIG. 1 by the guide holes 4a, 4b. Further, the vertical portion of the side portion 4 is provided with a generally T-shaped extension portion 4c that protrudes outward, and one arm portion 4d of the extension portion 4c allows
The upper convex portion 6c of the presser plate 6 is guided in the same direction. Further, through holes 4e and 4f are formed in the vertical portion of the side portion 4 as first through holes through which the ends of the guide shafts 2 and 3 are inserted. The end surfaces of the guide shafts 2 and 3 are respectively an end surface 4i of the guide hole 4a and an extension portion 4.
It comes into contact with the end surface of the other arm 4g of the guide shaft 2, 3 at the time of assembly.
There is no such thing as jumping out to the outside.

The convex portion 6a and upper corner of the presser plate 6 are provided with
Slanted portions 6d and 6e are provided which make sliding contact with the guide shafts 2 and 3, respectively, so that the guide shafts 2 and 3 receive force to the upper left in the process of pushing the presser plate 6 to the left in FIG. It's summery. In addition, there is a long hole 6h in the middle part of the presser plate 6.
A beam-shaped spring portion 6f with fixed ends is formed between the inclined portion 6d and the inclined portion 6e. This spring portion 6f is provided with a downward protrusion 6g, and when transitioning to the set state, the 6g
The g1 portion slides on the upper surface of the horizontal portion of the side portion 4, and in the set state, the 6g1 portion falls into the through hole 4h as the second through hole in the horizontal portion of the side portion 4, and the 6g2 portion falls into the second through hole 4h of the horizontal portion of the side portion 4. It comes into contact with the upper surface of the horizontal portion to prevent it from coming off in the right direction in FIG.

In the above configuration, when the guide shafts 2 and 3 are inserted into the through holes 4e and 4f of the base plate 1, if the presser plate 6 is pushed in to the left in FIG. 1, the guide shafts are automatically opened as shown in FIG. 2 and 3 are pushed by the inclined parts 6d and 6e to form the through hole 4.
It moves to corner positions e and 4f, contacts the walls of through holes 4e and 4f, and stops. In this set state,
Due to the action of the projection 6g, the spring portion 6f curves upward and is elastically deformed (see FIGS. 1 and 7), and the elastic force causes the guide shafts 2, 3 to
are pressed against the walls of the through holes 4e and 4f and cannot be moved from there. The presser plate 6 in the set state is in an extremely stable state because the protrusions 6a, 6b, and 6c are supported by the guide holes 4a, 4b and the arm portion 4d, respectively, and the protrusion 6g prevents it from coming off. The guide shafts 2 and 3 are also firmly supported. In particular, the guide shaft 2 is in contact with the inclined portion 6d even in the set state, so that it can be accurately positioned. This fixed state is maintained in exactly the same manner for the side portions 5 as well.

The above explanation applies when two guide shafts 2 and 3 are used, that is, when guide shaft 2 is used for original linear guidance and guide shaft 3 is used for rotation prevention (in the case of a single cylindrical guide shaft). , since the object to be moved rotates, a rotation prevention guide is required), but in the case of a guide device provided with another rotation prevention means, only one guide shaft 2 may be used. In this case, a projection may be provided at the position of the guide shaft 3 by bending or the like so that the head of the presser plate 6 can be pressed by the projection.

(Effects of the invention) As explained above, the guide device of the invention has the following effects:
This uses a flat metal holding plate that can be easily formed by press working. Therefore, processing is simple and the unit cost of parts can be reduced. In addition, the guide shaft can be fixed with one touch by simply pushing in the presser plate, reducing assembly man-hours, and is compact and does not require repeated attachment/detachment.
Durable.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a plan view of the base plate in Fig. 1, Fig. 3 is a front view, Fig. 4 is a right side view, and Fig. 5 is a plan view of the base plate in Fig. 1.
The figure is a front view of the presser plate in Figure 1, Figure 6 is a diagram explaining the operation in Figure 1, and Figure 7 is a front view of the presser plate in Figure 1.
It is a perspective view in a figure. 1... Base plate, 2, 3... Guide shaft, 4, 5... Side part, 4a, 4b... Guide hole, 4c... Extension part, 4d, 4g... Arm part, 4
e, 4f, 4h...through hole, 6...pressing plate, 6a, 6b, 6c...convex portion, 6d, 6e...
Inclined part, 6f...spring part, 6g...protrusion.

Claims (1)

[Scope of claim for utility model registration] Guide shafts 2 and 3 that guide a moving object in a straight line
A base plate 1 having first through holes 4e and 4f drilled in the wall surface of the side portion 4 through which the ends of the guide shafts 2 and 3 are inserted; A guide device comprising a metal flat presser plate 6 that is movable in the front-rear direction and presses the guide shafts 2 and 3 against the wall surfaces of the first through holes 4e and 4f, the base plate 1 A second through hole 4h is bored in the horizontal part of the side part 4, and the presser plate 6 has an elongated hole 6h extending in the front-back direction in the central part, and a second through hole 4h formed in the lower part of the elongated hole 6h, a spring section 6f that urges the presser plate 6 upward; a protrusion 6g2 that is provided at the lower part of the spring section 6f, contacts the upper surface of the horizontal portion of the base plate 1, and curves the spring section 6f upward; A protrusion 6g1 that engages with the second through hole 4h and performs positioning; and a protrusion 6g1 that slides into substantially lower portions of the guide shafts 2, 3 at least during their movement;
3, a sloped portion 6d that brings the substantially upper part of the base plate 1 into contact with the wall surface of the first through hole 4e, 4f of the base plate 1;
6e, and a guide device characterized by forming the following.