JP3130742B2 - Rotary operation type electric parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary operation type electric component such as a rotary switch in which a rotor is rotatably mounted on a stator, and more particularly to a snap-in structure for integrating the rotor and the stator. Regarding improvement.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing a conventional example of this type of rotary switch, and FIG. 5 is a perspective view showing a part of an elastic piece provided in the rotary switch. The rotary switches shown in these figures are provided with a stator 1 having an upward opening 1a, a rotor 2 rotatably mounted on the stator 1 and covering the opening 1a, and provided on the stator 1 and the rotor 2. It mainly comprises a contact portion 3. A cylindrical mounting hole 4 is formed in the center of the stator 1, and a current collecting pattern 5 is arranged concentrically around the mounting hole 4, and a terminal connected to the current collecting pattern 5 is provided. (Not shown) are led out. On the other hand, a plurality of elastic pieces 6 are integrally formed at the center of the rotor 2 at predetermined intervals in the circumferential direction, and a slider 7 is attached to the lower surface side of the rotor 2. And the current collecting pattern 5 constitute the contact part 3.

Each of the elastic pieces 6 protrudes downward from the top surface of the rotor 2 along the axial direction, and has a sliding contact portion 6a which is in sliding contact with the inner peripheral surface of the mounting hole 4, and a leading end of the sliding contact portion 6a. An outwardly extending claw 6b is bent and locked to a lower edge 4a of the mounting hole 4. The diameter of the mounting hole 4 is such that each elastic piece 6 can be press-fitted while being bent inward. It is set to the size of.

[0004] When assembling the rotary switch constructed as described above, first, each elastic piece 6 of the rotor 2 is inserted from above the mounting hole 4 of the stator 1 so that the sliding contact portion 6a of the elastic piece 6 has its own elasticity. The claw portion 6b of the elastic piece 6 is pressed down along the inner peripheral surface of the mounting hole 4 while being deformed so as to bend inward against the pressure. When the rotor 2 is pushed down to a position where the upper surface of the claw portion 6b penetrates the mounting hole 4, the sliding contact portion 6a expands outward due to its own elasticity. As shown in FIG. 6b is locked to the lower edge 4a of the mounting hole 4, and the sliding contact portion 6a slides on the inner peripheral surface of the mounting hole 4. As a result, the rotor 2 is mounted on the stator 1 in a state where its position is regulated in the radial direction and the axial direction. Becomes

[0005]

As described above, in the above-described rotary switch, the elastic pieces 6 formed integrally with the rotor 2 are utilized and the elastic pieces 6 are formed in the stator 1. The rotor 2 and the stator 1 are rotatably integrated simply by snapping into the mounting hole 4, so that the assembling workability can be improved and the number of parts can be reduced to reduce the cost. .

However, the elasticity (easiness of bending) of each elastic piece 6 is such that the sliding contact portion 6 which hangs from the top surface of the rotor 2 in the axial direction.
Therefore, if the overall length of the sliding contact portion 6a is set to be short, the elasticity of the elastic piece 6 is reduced and the elastic piece 6 is hardly bent, and it becomes difficult to insert the elastic piece 6 into the mounting hole 4. There are problems that the assemblability deteriorates and that the elastic piece 6 breaks during insertion. On the other hand, in order to reduce the height of the entire rotary switch, it is necessary to reduce the thickness of each of the stator 1 and the rotor 2, but as described above,
In consideration of the insertability and breakage of the elastic pieces 6, each elastic piece 6 integrally formed with the rotor 2 cannot be made too short, which is a major factor that hinders the thinning of the rotary switch. Was. Further, although each elastic piece 6 can be bent in the radial direction of the mounting hole 4, it cannot be bent in the axial direction of the mounting hole 4. As a result, a clearance is formed between the claw portion 6b of the elastic piece 6 and the lower edge portion 4a of the mounting hole 4, and the rotor 2 rattles in the axial direction with respect to the stator 1. There was also.

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances of the related art, and an object of the present invention is to provide a rotary operation type electric component which can suppress rattling of a rotor and is suitable for thinning.

[0008]

In order to achieve the above object, the present invention comprises a stator and a rotor rotatable with respect to the stator, wherein the stator and the rotor are mounted on one of the two. A rotary operation type electric component integrated with each other by press-fitting a plurality of provided elastic pieces into a cylindrical mounting hole drilled in one of the other,
The elastic piece has a base extending radially outward, a biased portion extending in a circumferential direction from a distal end of the base, and a sliding contact portion slidingly contacting an inner peripheral surface of the mounting hole. And a claw that projects outward in the direction and is locked to an edge of the mounting hole. Further, in the above configuration, the sliding contact portion is formed of a first arm member extending in an axial direction of the mounting hole and a second arm member extending in a circumferential direction of the mounting hole.

[0009]

According to the above means, the elasticity of the elastic piece is determined by the sum of the length of the base extending outward in the radial direction and the length of the sliding contact portion extending in the circumferential direction from the tip of the base. Since only the component in the axial direction of the sliding contact portion extends in the axial direction of the mounting hole of the base portion and the sliding contact portion, the sufficient elasticity of the elastic piece as a whole is ensured. The length in the axial direction can be shortened. Also, since the elastic piece can be deformed in the axial direction by the base,
The rotor can be rotated without rattling.
In particular, when the sliding contact portion is formed in a crank shape and includes a first arm member extending in the axial direction of the mounting hole and a second arm member extending in the circumferential direction of the mounting hole, the sliding contact portion extends in the axial direction of the mounting hole. Since only the first arm member is provided, even if the size of the first arm member is reduced, the elasticity of the entire sliding contact portion is ensured by the second arm member.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an elastic piece provided in a rotary switch according to one embodiment of the present invention, FIG. 2 is a sectional view of the rotary switch, and FIG. 3 is a plan view of a rotor provided in the rotary switch. In the figure, reference numeral 8 denotes a rotor, and 9 denotes an elastic piece, and portions corresponding to those of the conventional example shown in FIG.

The rotary switch according to the present embodiment is different from the above-described conventional example in the shape of each elastic piece 9 for integrating the rotor 8 and the stator 1, and other configurations are basically the same. It is. That is, a plurality of elastic pieces 9 are integrally formed in the center of the rotor 8 at predetermined intervals in the circumferential direction, and each elastic piece 9 has a base 10 radially extending radially outward from the center of the rotor 8. A sliding contact portion 11 extending from the tip of the base portion 10 in the circumferential direction so as to be deviated in the circumferential direction;
1 and a claw portion 12 protruding outward in the radial direction from the front end. Here, the axial length from the base portion 10 to the claw portion 12, in other words, the axial length of the sliding contact portion 11, is the axial length of the mounting hole 4 formed in the stator 1. Is set slightly smaller. The sliding portion 11 is formed in a crank shape, and has a first arm member 11a extending in the axial direction of the mounting hole 4 and a second arm member 11b extending in the circumferential direction of the mounting hole 4. The first and second arm members 11a and 11b
The pawl portion 12 is engaged with the lower edge 4a of the mounting hole 4.

When assembling the rotary switch configured as described above, first, each elastic piece 9 of the rotor 8 is inserted from above the mounting hole 4 of the stator 1, and the sliding contact portion 11 of the elastic piece 9 makes its own elastic contact. The claw portion 12 of the elastic piece 9 is pressed down along the inner peripheral surface of the mounting hole 4 while being deformed so as to bend inward against the pressure. Further, the rotor 8 is pushed down to a position where the lower surface of the rotor 8 abuts against the upper surface of the stator 1, and the base 10
Is pressed to deflect the elastic piece 9 downward, and when the upper surface of the claw portion 12 passes through the mounting hole 4, the sliding contact portion 11 expands outward due to its own elasticity. As a result, as shown in FIG. 2, the claw portion 12 of each elastic piece 9 is locked to the lower edge 4 a of the mounting hole 4, and the first and second arm members 11 a and 11 b of the sliding contact portion 11 are provided. Is in sliding contact with the inner peripheral surface of the mounting hole 4. As a result, the rotor 8 is mounted on the stator 1 in a state where the position of the rotor 8 is regulated in the radial direction and the axial direction. Becomes

In the above embodiment, the elasticity of each elastic piece 9 integrally formed with the rotor 8 is determined by the length of the base 10 extending outward in the radial direction and the sliding contact portion 1 extending from the tip of the base 10.
1 is determined by the sum of the lengths of the first and second sliding members 11, and only the first arm member 11 a of the sliding contact portion 11 extends in the axial direction of the mounting hole 4 among the base portion 10 and the sliding contact portion 11. After ensuring sufficient elasticity of the entire elastic piece 9, the axial length of the elastic piece 9 can be reduced. For this reason, the elastic piece 9 is used to reduce the thickness of the rotary switch.
Since the axial dimension of the elastic piece 9 is shortened, the elastic piece 9 can be prevented from being damaged, and the elastic piece 9 can be easily snapped into the mounting hole 4. Further, since the elastic piece 9 can be deformed in the axial direction by the base 10, the claw 12 of the elastic piece 9 is set to be slightly smaller than the mounting hole 4 by setting the elastic piece 9 to be slightly smaller than the mounting hole 4. The rotor 8 can be brought into close contact with the lower edge 4a, and the rotor 8 can be rotated without rattling. Further, the sliding contact portion 11 of the elastic piece 9 is formed in a crank shape, and the first arm member 11a extending in the axial direction of the mounting hole 4 is provided.
And the second arm member 11b extending in the circumferential direction of the mounting hole 4, so that the second arm member 11b, which does not contribute to the increase in the dimension in the axial direction, causes the sliding contact portion 11
Sufficient elasticity can be given to the whole.

In the above embodiment, the case where the mounting hole 4 is provided on the stator 1 side and the elastic piece 9 is provided on the rotor 8 side has been described. On the contrary, the elastic piece is provided on the stator side. A mounting hole may be provided on the rotor side. In the above embodiment, the case where three elastic pieces 9 are provided on the rotor 8 has been described. However, the number of the elastic pieces 9 is not limited to three, but may be two or four or more as necessary. You can also. Further, in the above embodiment, the case where the sliding contact portion 11 of the elastic piece 9 is formed in a crank shape in which the first arm member 11a and the second arm member 11b are continuous has been described. The shape is not limited to a crank shape, but may be any shape having a portion extending in the circumferential direction of the mounting hole 4.

[0015]

As described above, according to the present invention,
The elastic piece for snap-in is provided with a base extending outward in the radial direction and a sliding contact part extending in the circumferential direction from the tip of the base. It is possible to provide a rotary operation type electric component that can be reduced in axial length and suitable for thinning. In addition, since the base of the elastic piece is deformed in the axial direction, the claw of the elastic piece can be brought into close contact with the edge of the mounting hole. Electrical components can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of an elastic piece provided in a rotary switch according to one embodiment of the present invention.

FIG. 2 is a sectional view of the rotary switch.

FIG. 3 is a plan view of a rotor provided in the rotary switch.

FIG. 4 is a sectional view of a rotary switch according to a conventional example.

FIG. 5 is a perspective view of an elastic piece provided in the rotary switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 4 Mounting hole 8 Rotor 9 Elastic piece 10 Base 11 Sliding contact part 11a 1st arm member 11b 2nd arm member 12 Claw part

Claims (2)

(57) [Claims] 1. A stator and a rotor rotatable with respect to the stator, wherein the stator and the rotor are provided with a plurality of elastic pieces provided on one of the two and perforated on the other. A rotary operation type electric component integrated with each other by press-fitting into a cylindrical mounting hole,
The elastic piece has a base extending radially outward, a biased portion extending in a circumferential direction from a distal end of the base, and a sliding contact portion slidingly contacting an inner peripheral surface of the mounting hole. A claw portion protruding outward in the direction and being locked to an edge of the mounting hole. 2. The mounting device according to claim 1, wherein the sliding contact portion includes a first arm member extending in an axial direction of the mounting hole and a second arm member extending in a circumferential direction of the mounting hole. A rotary operation type electric component characterized by the above-mentioned.