JP2515053Y2 - Rotating electronic components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to rotary electronic parts such as rotary variable resistors and rotary switches.

[Conventional technology]

FIG. 4 is an exploded perspective view showing a conventional rotary variable resistor.

As shown in the figure, a conventional rotary variable resistor 100 is composed of a stopper plate 10, a substrate 20, and a sliding type object 40 having sliders 30, 30 attached thereto.

Although the improvement in the present invention is made to the stopper plate 10 among the above-mentioned parts, the structure and operation of the whole rotary variable resistor using the conventional stopper plate 10 will be described here in advance.

Here, FIG. 5 is a view showing the stopper plate 10. FIG. 5 (a) is a front view, FIG. 5 (b) is a left side view, and FIG. 5 (c) is an engaging piece 13 of FIG. Right side view showing only the part of
The same figure (d) is a front view.

As shown in the figure, the stopper plate 10 is composed of a substantially square metal plate, and a cylindrical protrusion 11 is provided at the center thereof, and the left side thereof is bent in the protruding direction of the protrusion 11. A locking tongue 12 is provided. An engaging piece 13 having a height lower than that of the engaging tongue piece 12 is provided at a position on the right side of the stopper plate 10 facing the engaging tongue piece 12. Further, locking projections 14 and 15 for fixing the rotary variable resistor 100 to other members are provided on the upper portions of the locking tongue piece 12 and the engaging piece 13 in a direction opposite to the protruding direction of the projection 11. It is bent in the direction.

Next, FIG. 6 is a plan view showing the substrate 20, and is a view of the substrate 20 shown in FIG. 4 viewed from the back side.

As shown in the figure, the substrate 20 has a substantially ring-shaped resistor pattern 21 and a current collecting pattern 22 formed on one surface of a hard insulating substrate by screen printing, and the end portions of these patterns are metal plates. And a through hole 24 is provided at the center of these ring-shaped patterns. The through hole 24 is sized to penetrate the protrusion 11 provided on the stopper plate 10.

Further, notches 25 and 26 for engaging the locking tongue piece 12 and the engaging piece 13 of the stopper plate 10 are provided on both sides of the substrate 20.

Next, FIG. 7 is a view showing the sliding type object 40, and FIG.
Is a front view, and FIG. 7B is a sectional view taken along line AA of FIG. In addition, in the same figure (a), a slider is attached to this sliding type object 40.
It shows the state where 30 is attached.

As shown in the figure, the sliding type object 40 is made of a disc-shaped synthetic resin plate, and the metal sliders 30, 30 shown in FIG. A slider mounting surface 41 for mounting is provided, a circumferential projection 42 is provided on the outer periphery of the slider mounting surface 41, and a ring-shaped groove is provided outside the projection 42.
43 are provided. Then, a part of the groove 43 is filled up to the height of the side surface of the sliding type object 40 to form a locking portion 44.

In addition, a protrusion 46 having a cylindrical shape and having a through hole 45 therein is provided at the center of the sliding type object 40.

On the other hand, each of the sliders 30 and 30 is constructed by providing a contact portion 31 which is in sliding contact with the resistor pattern 21 or the current collecting pattern 22 of the substrate 20 on a predetermined portion of a metal plate, as shown in FIG. There is. The contact portion 31 is bent toward the front side of the paper surface of FIG. Further, these sliders 30 and 30 are inserted into projections 47 provided on the slider mounting surface 41 of the sliding type object 40, and are fixed by caulking the tips thereof. Also, on the outer periphery of this sliding type object 40, there are many unevenness 48 for slip prevention.
Is provided.

On the other hand, on the opposite surface of the sliding type object 40, two steps of recesses 49 and 50 are formed as shown in FIG.

Next, a method of assembling the rotary variable resistor 100 will be described mainly with reference to FIG.

As shown in the figure, in order to assemble this rotary variable resistor 100, the projection 11 provided on the stopper plate 10 (see FIG. 5)
Is inserted into the through hole 24 of the substrate 20 and the through hole 45 of the sliding mold 40, and the tip of the projection 11 is placed at the recess 50 of the sliding mold 40 shown in FIG. 7 (b). Close.

As a result, the sliding object 40 is rotatably supported by the projection 11. At this time, at the same time, the contact points 31 of the sliders 30, 30 attached to the sliding mold 40 are in contact with the resistor pattern 21 and the current collecting pattern 22 on the substrate 20, and the stopper plate 10 is locked. The tongue piece 12 engages with the notch 25 provided in the base plate 20, and its tip is inserted into the groove 43 of the sliding mold 40. The engagement piece 13 of the stopper plate 10 shown in FIG. 5 engages with the notch 26 of the substrate 20, and the substrate 20 is fixed to the stopper plate 10 together with the locking tongue piece 12 engaged with the notch 25. To do.

Then, when the sliding type object 40 of the rotary variable resistor 100 assembled as described above is rotated, the contact points 31 of the sliders 30 and 30 cause the resistor pattern 21 of the substrate 20 and the current collecting pattern 2
2 Slide up to change the resistance between terminals 23.

On the other hand, when the sliding type object 40 is rotated, the groove formed in the sliding type object 40
43 also rotates, but when the sliding type object 40 is rotated by a predetermined angle, the side surface of the locking tongue piece 12 protruding into the groove 43 is the side surface of the locking portion 44 of the sliding type object 40 shown in FIG. Abut on and lock its rotation.

[Problems to be solved by the device]

However, such a conventional rotary variable resistor 100
In this case, when it is attempted to further rotate the locked sliding object 40 with a strong force, the locking tongue piece 12 provided on the stopper plate 10 is locked by the locking portion 44 of the sliding object 40. There was a problem of overcoming.

Here, FIG. 8 is a schematic view showing the engagement state of the conventional locking tongue piece 12 and the locking portion 44 provided on the sliding type object 40.

As shown by the solid line in the figure, the locking tongue 12 of the stopper plate 10 normally moves in the groove 43 as the sliding mold 40 rotates,
The side surface contacts the side surface of the locking portion 44, and the rotation of the sliding type object 40 is stopped.

However, if an unreasonable force is applied to the sliding type object 40 from this state to further rotate it, the sliding type object 40
Since the central portion of the sliding type object 40 is only pivotally supported by the projection 11, the sliding type object 40 is slightly tilted around the projection 11, and the locking portion 44 is lifted as shown by the arrow in the figure, and the locking tongue is raised. You will get over piece 12.

Further, at this time, the locking tongue piece 12 may be deformed. In particular, the side x of the portion of the locking tongue 12 bent from the stopper plate 10 has weak strength, and this portion is easily deformed.

The present invention has been made in view of the above points, and provides a rotary electronic component in which a locking portion abutting on a locking tongue does not overcome the sliding tongue even when an excessive force is applied to the sliding type object. To do.

[Means for solving the problem]

In order to solve the above problems, the present invention has improved the tongue for locking the stopper plate used in the rotary electronic component.

That is, the side surface facing the groove 43 at both ends of the locking portion 44 of the sliding type object 40 is a plane substantially perpendicular to the rotation direction of the sliding type object 40,
Moreover, the sliding type object 40 is provided on both sides of the upper end of the locking tongue piece 12A.
Only the tips of the locking portions 44 of the locking portion 44 come into contact with the side surfaces of the locking portions 44 and the sharp-angled claws bite into the side surfaces when they are abutted with a strong force.
It was decided to provide a few.

[Action]

With the above-described structure, the locking tongue piece 12A moves in the groove 43 as the sliding object 40 rotates, and then the acute-angled claw 2 or 3 on the side surface thereof contacts the side surface of the locking portion 44. The sliding type object 40 stops rotating.

Then, if an unreasonable force is applied to the sliding type object 40 from this state to further rotate the sliding type object 40, the sliding type object 40 tries to float in the direction away from the stopper plate 10A around the protrusion 11. However, since the claw 2 has an acute angle, the claw 2 bites into the side surface of the locking portion 44 of the sliding type object 40 made of synthetic resin, and the sliding type object 40
Block 40 movements. Therefore, even if an unreasonable force is applied to the sliding object 40, the locking portion 44 does not get over the locking tongue piece 12A.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an exploded perspective view showing a rotary variable resistor 1 according to this embodiment.

The rotary variable resistor 1 shown in the figure comprises a stopper plate 10A, a substrate 20, sliders 30 and 30, and a sliding type object 40.

Here, since the substrate 20, the sliders 30 and 30, and the sliding type object 40 have the same shape and structure as the corresponding parts of the conventional rotary variable resistor 100, detailed description thereof will be omitted.

That is, in the present invention, the conventional rotary variable resistor 100 is used.
Is different from the stopper plate 10A.

2A and 2B are views showing a stopper plate 10A used in the present invention. FIG. 2A is a front view, FIG. 2B is a left side view, and FIG. 2C is the engagement shown in FIG. A side view of the right main part showing only the part of the piece 13, the figure (d) is a front view, the figure (e) is the figure (b).
FIG. 12 is an enlarged view of the locking tongue piece 12A shown in FIG.

As shown in the figure, the stopper plate 10A is made of a substantially square metal plate, and a cylindrical protrusion 11 is provided at the center thereof, and the left side thereof is bent in the protruding direction of the protrusion 11. The locking tongue 12A is provided. Further, at a position on the right side of the stopper plate 10A facing the locking tongue 12A, an engaging piece 13 whose height is lower than that of the locking tongue 12A.
Is provided. Also, these locking tongue pieces 12A and the engaging pieces 1
On the upper portion of 3, there are provided locking projections 14 and 15 for fixing the rotary variable resistor 100 to other members, which are bent in a direction opposite to the projection direction of the projection 11.

The stopper plate 10A differs from the conventional stopper plate 10 shown in FIG. 5 in the shape of the locking tongue 12A.

That is, in the present invention, as shown in FIG. 2 (e), the locking tongue piece 12A has sharp claws 2 and 3 protruding from both sides of the upper end thereof, and a stopper plate for the locking tongue piece 12A. Both corners 4 and 5 of the portion bent from 10A are not right-angled, but R are provided so that the width of the locking tongue 12A gradually increases toward the root side.

The stopper plate 10A having such a shape is integrally assembled with the substrate 20, the sliders 30, 30, and the sliding type object 40 shown in FIG. 1 to form the rotary variable resistor 1. When the 40 is rotated, the locking tongue 12A moves in the groove 43 provided in the sliding type object 40.

Here, FIG. 3 is a schematic view showing an engaging state of the locking tongue piece 12A and the locking portion 44 provided on the sliding type object 40.

As shown in the figure, the tongue 1 for locking the stopper plate 10A is normally used.
2A moves in the groove 43 as the sliding type object 40 rotates, and then the acute-angled claw 2 (or 3) provided on the side surface of the sliding type object 40 abuts on the side surface of the locking portion 44, and Stop rotation.

Then, if an unreasonable force is applied to the sliding type object 40 from this state to further rotate the sliding type object 40, the sliding type object 40 is rotated about the protrusion 11 (see FIG. 2) of the stopper plate 10A. It tries to float away from the surface of 10A, but since the claw 2 has an acute angle, the sliding type object 40 made of synthetic resin is used.
It bites into the side surface of the locking portion 44 of the and prevents the sliding type object 40 from rising. Therefore, even if an unreasonable force is applied to the sliding object 40, the locking portion 44 does not get over the locking tongue piece 12A.

At this time, a strong force that deforms the locking tongue 12A may be applied.
Since R is provided at both corners 4 and 5 of the side x (the portion weak in strength) of the portion bent from the stopper plate 10A,
Its strength is reinforced, so that the locking tongue 12A is not deformed.

It goes without saying that the present invention can be applied to other rotary electronic parts such as a rotary reed switch.

[Effect of device]

As described in detail above, according to the rotary electronic component of the present invention, the side surfaces of both ends of the sliding type object are flat, and the sliding type object is provided at both upper end sides of the locking tongue piece. Despite the simple structure of providing a sharp-angled claw that bites into the side surfaces of both ends of the locking portion when only the tips contact the side surfaces with strong force. Even if you try to rotate the sliding type object by applying an unreasonable force from the state where the claw of the tongue is in contact with the side surface of the locking part of the sliding type object,
The claw of the locking tongue is in contact with the side surface of the locking part of the sliding type object only at the sharp tip, so that the claw easily bites, and in the bited state, the two are firmly engaged. Since it is stopped, the sliding type object does not float up, and it has an excellent effect that the locking portion of the sliding type object can surely be prevented from getting over the locking tongue piece.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a rotary variable resistor 1 according to the present invention, FIG. 2 is a view showing a stopper plate 10A used in the present invention, and FIG. 3 is a locking tongue piece 12A and a sliding type object. FIG. 4 is a schematic view showing an engaged state of a locking portion 44 provided in 40, FIG. 4 is an exploded perspective view showing a conventional rotary variable resistor 100, and FIG. 5 is a stopper plate 10.
FIG. 6, FIG. 6 is a plan view showing the substrate 20, FIG. 7 is a view showing the sliding type object 40, and FIG. 8 is a diagram showing the engagement provided on the conventional locking tongue piece 12 and the sliding type object 40. FIG. 6 is a schematic view showing an engagement state of a stopper 44. In the figure, 1 ... rotary variable resistor, 2, 3 ... claws, 4,5 ... both corners,
10A ... stopper plate, 11 ... projection, 12A ... locking tongue, 20 ... substrate, 21 ... resistor pattern (conductor pattern), 22 ... current collecting pattern (conductor pattern), 24 ... through hole, 30,30 ... Slider, 40 ... Sliding type object, 43 ... Groove, 44 ... Locking part.

Claims (1)

(57) [Scope of utility model registration request] 1. A stopper plate provided with a cylindrical or cylindrical projection at a substantially central portion of a metal plate and a locking tongue bent on the outer periphery of the metal plate in a projecting direction of the projection. A substrate in which a substantially ring-shaped conductor pattern is formed on one surface and a through hole is provided in the substantially central portion thereof, and a metal which is a plate made of synthetic resin and which slides on the conductor pattern of the substrate on one surface And a sliding type member provided with a ring-shaped groove on the outer periphery of the slider and a locking portion that fills a part of the groove. The tongue for locking the stopper plate is inserted into the groove of the sliding mold and is inserted into the through hole of the base plate and the through hole of the sliding mold, and at the same time, the tip is crimped, By bringing both sides of the sliding tongue into contact with the side surfaces facing the groove at both ends of the engaging portion of the sliding tongue, In a rotary electronic component having a structure for stopping rolling and restricting a rotation angle thereof, side surfaces of both ends of the locking portion of the sliding type object are planes substantially perpendicular to a rotation direction of the sliding type object, and When the tip ends of both sides of the upper end of the locking tongue are in contact with the side surfaces of both ends of the locking portion of the sliding type object, and when they are abutted with a strong force, an acute-angled claw is formed. A rotary electronic component characterized by being provided with.