JPH044267Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of the Invention] This invention relates to a positioning mechanism for an operating member used, for example, in a tape recorder.

[Conventional technology]

As a positioning mechanism for an operating member in a tape recorder, there is a structure shown in FIG. 4, as disclosed in, for example, Japanese Utility Model Application Publication No. 52-127803.

In Fig. 4, 1 is a movable member formed integrally with the operation button, and has a plurality of through holes 2 for positioning.
a, 2b. 3 is a ball accommodated in a hole 5 of the base body 4, and one side is restrained by a leaf spring 6, and when the movable member 1 is moved by operating the operation button, it is fitted into the through holes 2a and 2b sequentially. After the movable member has stopped, the operation button is positioned.

However, the positioning mechanism having such a structure has problems in that it is complicated, has a large number of parts, and is difficult to assemble.

Further, there is a positioning mechanism shown in FIGS. 5 and 6 that has a relatively small number of parts and operates accurately. In FIG. 5, reference numeral 11 denotes a movable member integrally formed with the operating section, and an elastic member 13 having a triangular engagement claw portion 12 at its tip is integrally held in a cantilevered manner.

On the other hand, the guide member 14 of the movable member is located on the main body side.
and 15, and one guide member 15 has a plurality of positioning recesses 16a, 16b, . . . formed therein.

In this positioning mechanism, when the movable member 11 is operated as shown by the arrow by operating the operating member, the engaging claw portion 12 moves into the positioning recesses 16a, 16b...
Since the operating member can be engaged with and stopped at each position, the operating member can be easily positioned.

[Problem that the invention attempts to solve]

However, in this positioning mechanism, as shown in FIG. 6, the engaging claw portion 12 is formed symmetrically with respect to the center line 17 at an angle θ ₁ on the opposite side and an angle θ ₂ on the near side from the proximal end which is the fulcrum. Therefore, the difference in the jerky feeling when operating in the direction of arrow A and in the opposite direction of arrow B, where the resistance feeling due to the deflection of the elastic member is different, gives the operator a sense of discomfort. In an electronic device such as a tape recorder, it is desirable that the click feeling be uniform no matter where the operating member is operated.

Therefore, this invention was made based on the above circumstances, and provides a positioning mechanism for an operating member that is relatively simple in construction, easy and accurate to operate, and provides an even click feeling when operated in any direction. The purpose is to

[Means and actions for solving problems]

This idea is such that the triangular engagement claw provided on the cantilevered elastic member has a larger angle on the side far from the proximal end and a smaller angle on the side closer to the proximal end with respect to the center line including the apex. It is characterized by being formed asymmetrically in shape, thereby making it possible to equalize the resistance feeling, that is, the click feeling caused by the bending of the elastic member when operating the operating member.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 21 is an operating member, and 22 is a movable member formed integrally with the operating member. is operated in the direction of the arrow. 24 and 25 in Figure 1
is a guide member, and one guide member 25 is formed with a plurality of recesses 26a, 26b, . . . for positioning. The movable member has an elastic member 28 having a triangular engagement claw portion 27 at its tip that engages with these recesses 26a, 26b, etc., and the linear portion 29 thereof is substantially parallel to the moving direction of the movable member 22. It is held together in a cantilevered manner.

The engagement claw portion 27 is formed at the tip of the linear portion 29 so as to protrude in a direction substantially perpendicular thereto, and
As shown in the figure, the elastic member 28 is asymmetrically formed in such a shape that the angle θ ₁ on the side far from the base end is larger and the angle θ ₂ on the side closer to the base end is smaller with respect to the center line 30 including the apex. There is. As an example, the angle θ ₁ is 60°,
The one with θ ₂ of 30° was suitable.

Therefore, in this positioning mechanism, when the operating member 21 is operated in the direction shown by the arrow to move the movable member 22, the elastic member 28 is bent while the engaging claw portion 27 is moved.
Since the recesses 26a, 26b, . . . move sequentially to the positioning recesses 26a, 26b, etc., desired positioning can be easily and reliably performed by stopping the engaged position.

Moreover, in this positioning mechanism, the engaging claw portion 27 is formed asymmetrically, and the angle θ ₁ on the side far from the base end of the elastic member 28 is large, and the angle θ ₂ on the side near the base end is large with respect to the center line 30 including the apex. Since the elastic member 28 is formed to be small in size, it is appropriately adjusted so that the resistance feeling when the elastic member 28 is bent is uniform when the operating member 21 is operated in any direction, so there is no click feeling. It has the important feature that it is almost uniform and does not cause any discomfort.

In addition, the positioning mechanism of this invention has the advantage that it is easy to manufacture, has few failures, and operates reliably for a long period of time because the elastic member and the movable member are integrated into a simplified structure with a small number of parts.

Note that this invention is not limited to the above embodiments, and can be implemented with various modifications without changing the gist.

For example, the angles θ ₁ and θ ₂ of the tip portions of the engaging claw portions 12 are not limited to the above-mentioned numbers, but can be appropriately selected from a wide range depending on the application and structure.

[Effect of idea]

As described above, according to this invention, it is possible to provide a positioning mechanism for an operating member that has a relatively simple structure, is easy and accurate to operate, and has an even click feeling when operated in any direction. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the structure of an embodiment of this invention with the movable member exposed, and Fig. 2 is the same as Fig. 1.
3 is an explanatory diagram of the shape of the engaging claw portion of the same embodiment. FIG. 4 is a longitudinal sectional view showing an example of the conventional positioning mechanism. FIGS. 5 and 6 are the conventional positioning mechanism. Another example of the positioning mechanism is shown, and FIG. 5 is a plan view, and FIG. 6 is an explanatory diagram of the shape of the engaging claw portion. 21... Operating member, 22... Movable member, 23...
...Surface plate, 24, 25...Guide member, 26a, 2
6b... Recessed portion, 27... Engaging claw portion, 28... Elastic member, 29... Straight portion, 30... Center line.

Claims (1)

[Claims for Utility Model Registration] (1) A device having an engaging recess provided in a fixed portion, a movable member provided integrally with an operating member, and a linear portion substantially parallel to the moving direction of the movable member. an elastic member held by the movable member in a cantilevered manner at its proximal end and having an engagement claw portion having a triangular tip that engages with the engagement recess and protrudes in a direction substantially perpendicular to the linear portion; The operating member is characterized in that the engaging claw portion is asymmetrically formed in such a shape that the angle on the side far from the proximal end is larger and the angle on the side closer to the proximal end is smaller with respect to the center line including the apex. positioning mechanism. (2) The positioning mechanism for the operating member according to claim 1, wherein the angle on the side far from the base end is 60°, and the angle on the side near the base end is 30°.