JP2544568Y2 - Positioning mechanism for engagement between rack and gear of disk player - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a structure in which a gear provided with a rack provided in various kinds of machinery such as audio equipment meshes with a gear. Regarding the mechanism.

[Prior Art] Conventionally, a method of specifying the position of a kami-eye between a rack and a gear includes, first, when both components are in an appropriate positional relationship, a reference line or a figure is coincident or continuous. There is a method in which a mark for visually recognizing this fact is provided, the position is manually adjusted so that the mark is coincident or continuous, and then a kami eye is formed to determine a meshing position. In the second method, the gears are fixed at predetermined positions with pins, and the first tooth profile at the end of the rack is inserted and prepared so that the first tooth profile is formed. This is a method for determining the position of the kami-eye.

"Problems to be Solved by the Invention" In the first prior art described above, since the positioning method is based on visual matching of the mark, the structure including the rack and the gear is installed in a place where the mark is hard to see. In such a case, the positioning adjustment cannot be performed. Also, the second
In the related art, it takes time and effort to insert and remove a pin at a predetermined position, and assembly is troublesome. In addition, since both conventional technologies realize the Kami-eye with the position incorrect, it is necessary to check the position after the Kami-eye adjustment to see if the position is correct or incorrect. However, there is a drawback that it is difficult to use the conventional positioning mechanism when there is a possibility that surrounding devices may be damaged.

The present invention raises a kami eye only when the position is correct,
When the position is wrong, the above-mentioned difficulty is solved by preventing the kami eye from being formed.

[Means for Solving the Problem] In a structure in which a rack and a gear mesh with each other, the gear has a tooth-shaped concave portion by cutting a tooth shape having a predetermined number of teeth down to a tooth bottom surface for a predetermined ratio of the tooth width. It is formed. On the other hand, the rack is formed in such a shape that the tooth grooves are filled up to the tooth apex surface by a width corresponding to the toothed concave portion of the gear, of a length corresponding to a predetermined number of teeth from the end thereof. At the same time, for the remaining width of the tooth width, a toothing projection formed by cutting the tooth profile down to the tooth bottom surface is formed. Then, the toothed projections of the rack are fitted into the toothed recesses of the gears, and the toothed teeth are formed only when the positional relationship between them is specified, whereby the toothed positions of both teeth are specified. This is a rack and gear meshing positioning mechanism.

"Operation" The positioning mechanism according to the present invention is always simple and accurate when inserting the end of the rack having the toothed projection into the toothed recess of the gear when kami-eye is started. Can realize tooth-shaped kamiai.
If the toothing projection does not fit with the toothing recess when the insertion operation is performed, the toothing projection will be in the way and will not cause toothing with the gear. do not do.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.

The above-described structure in which the rack and the gear mesh with each other is used as a constituent member of various kinds of equipment. In the case of the illustrated embodiment according to the present application, the carrier in the disc player protrudes from the player body and is stored. It is used as a part of the configuration of the means.

As shown in FIG. 1, the disc player is to be played with a player main body 1 in which a transport mechanism and a clamp mechanism are combined with a chassis, a playing means 2 including a spindle motor, a pickup, an information converter, and the like. A carrier 3 for holding, guiding and transporting the disc type record carrier,
These components are assembled and housed in a housing (not shown). The carrier 3 mounted so as to protrude and be stored in the player main body 1 is configured to move in the front-rear direction by means of a gear 4 provided on the player main body 1 and a rack 5 provided on the carrier 3. . In such a case, if the gear 4 and the carrier 3 are not misaligned in a correct positional relationship, when replacing the disk-type record carrier, the carrier 3 may not be sufficiently protruded to a predetermined position, or when the carrier 3 is stored, the spindle may be correctly positioned. There is a disadvantage that the disc-shaped record carrier is not transferred onto the motor. However, as shown in the figure, since the positions of the gear 4 and the rack 5 are located at the back of the player body 1, it is difficult to correctly position and confirm the position. Therefore, means for reliably performing the kami-ai at the correct positions of both are demanded as a technical problem.

In the present invention, as a means for solving the above technical problem, as shown in FIGS. 2 and 3, both the gear 4 and the rack 5 are provided with a positioning mechanism for correct engagement.

As shown in the figure, the gear 4 has a tooth shape having a predetermined number of teeth (three in this embodiment) x for a predetermined ratio (a half of the tooth width A in this embodiment) a of the tooth width A. The tooth bottom is cut off to form the concave portion 6. Therefore, the tooth profile remains for the remaining ratio b (in the embodiment, the remaining tooth width A is 1/2) in the tooth width A, and the function as the gear after the kami eye is maintained. It is needless to say that a predetermined ratio of the tooth width A for forming the engagement concave portion 6 may be set to other than 1/2.

On the other hand, the rack 5 has a predetermined number of teeth (three teeth in the embodiment) x from the end thereof for a width (corresponding to the engaging recess 6 of the gear 4) of the tooth width B. In the embodiment, the tooth groove is formed to fill the tooth tip surface by a half of the tooth width A), and for the remaining width c of the tooth width, the tooth profile is cut to the tooth bottom surface. Are formed.

Then, the toothing protrusion 7 of the rack 5 is fitted into the toothing recess 6 of the gear 4 so that the kami-eye starts only when the positional relationship between the two is specified.

That is, if the rack is inserted toward the pitch surface of the gear and the teeth 7 of the rack 5 are fitted into the teeth 6 of the gear 4, the teeth 7 and the teeth 6 of the gear 4 must be inserted. Starting with the kami eye of each subsequent first tooth profile, kami eye is always realized at the correct position as designed.

If the mutual positional relationship between the rack 5 and the gear 4 is not correct, the toothing projection 7 makes it impossible to cause a misalignment with the gear 5, so that the two misalignments are inadvertently realized with an incorrect positional relationship. Never.

In other words, in the case of the embodiment, if the carrier 3 is inserted into the player main body 1 and the gears of the player main body are only camed on the rack 5 of the carrier 3, the cam eye is always in the correct position. The process
It will be very easy.

[Effect] As described above, the present invention relates to a structure in which a rack and a gear mesh with each other. Is formed with a toothed projection corresponding to the toothed recess of the gear of the tooth width, and the toothed projection of the rack is fitted into the toothed recess of the gear to determine the positional relationship between the two. When the rack and gears are configured so as to start the kami-eye, the meshing position of the rack and the gear is always as designed, and no other kami-ai is realized. In other words, if the rack and gear meshing positioning mechanism according to the present invention is used,
Even if the structure where the rack and the gear mesh with each other is not visible or is difficult to see, the meshing positions can always be correctly combined, and malfunctions due to this can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire structure of an audio player provided with a rack and gear meshing positioning mechanism according to the present invention, and FIG. 2 is a perspective view showing a rack and gear meshing positioning mechanism according to the present invention. FIG. 3 is a perspective view showing another embodiment of the meshing positioning mechanism. Description of reference numerals of main parts 1... Player body 2... Playing means 3... Carry 4... Gear 5... Rack 6...

Claims (1)

(57) [Scope of request for utility model registration] In a structure in which a rack and a gear mesh with each other,
The gear has a predetermined number of teeth in the tooth width, and the tooth profile of a predetermined number of teeth is cut to the bottom surface thereof to form an engagement concave portion, while the rack is a predetermined number of teeth from its end. Regarding the length, the tooth width is formed into a shape such that the tooth groove is filled up to the tooth tip surface by the width corresponding to the gearing concave portion of the gear among the tooth width, and the remaining width of the tooth width is defined as:
A toothing profile formed by cutting the tooth profile down to the tooth bottom surface is formed, and the toothing projection of the rack is fitted into the toothing recess of the gear so that the kamiai starts when the positional relationship between the two is specified. A rack and gear meshing positioning mechanism.