JPH0628957U - Rotatable electrical parts - Google Patents

Abstract

(57) [Abstract] [Purpose] The snap-in structure is suitable for thinning since the snap-in structure has been improved so that the flexibility required when attaching the rotor to the stator can be secured even if the elastic piece for snap-in is shortened. (EN) Provided is a rotary operation type electric component capable of suppressing backlash during rotation of a rotor. [Structure] An elastic piece 6 for snap-in of the rotor 5
An elastic arm 7 made of synthetic resin is provided which extends outward from the base portion of the above and supports the elastic piece 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary operation type electric component such as a rotary switch that performs snap-in in which when a rotor is attached to a stator, the other elastic piece is press-fitted into and engaged with one of the attachment holes, and particularly, the snap operation. Regarding improvement of in-structure.

[0002]

[Prior art]

 FIG. 4 is a sectional view showing a conventional example of this type of rotary switch, FIG. 5 is a plan view thereof, and FIG. 4 shows a section taken along the line AA of FIG. .

The rotary switch shown in these figures has a stator 1 in which a concentric current collecting pattern 3 is arranged around a cylindrical mounting hole 2 and terminals 4 are provided to project laterally, and a stator 1 is provided in an inner peripheral portion. A ring-shaped resin molded product having a protruding elastic piece 6 is combined with a rotor 5 having a slider (not shown) made of a thin metal plate fixed thereto. The rotor 5 is rotatably attached to the stator 1 by performing snap-in using the property, and the slider is brought into contact with and separated from the current collecting pattern 3 with the rotation of the rotor 5 to perform switching. It is like this. That is, elastic pieces 6 having outward engaging claws 6a at the tip end thereof and extending along the axial direction of the rotor 5 are provided at four equally spaced locations on the inner peripheral portion of the rotor 5. On the other hand, since the diameter of the mounting hole 2 of the stator 1 is set so that each elastic piece 6 can be inserted while bending the elastic piece 6 inward, the elastic piece 6 is press-fitted into the mounting hole 2 from above in FIG. When the engaging claws 6a pass through the mounting hole 2, the elastic pieces 6 elastically contact the inner wall surface of the mounting hole 2, and thus the rotor 5 is regulated in the radial and axial directions. It is attached to the stator 1. Further, the rotor 5 thus mounted on the stator 1 is not restricted in position in the circumferential direction and thus is rotatable, so that each elastic piece 6 can be slid along the inner wall surface of the mounting hole 2.

As described above, the rotary switch in which the rotor 5 is rotatably attached to the stator 1 by performing the snap-in utilizing the flexibility of the elastic piece 6 is extremely easy to assemble, The number of parts can be minimized, which is advantageous for cost reduction.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional snap-in structure, when the elastic piece 6 is shortened in order to make the product thinner, its flexibility is weakened, so that the elastic piece 6 is hard to be pressed into the mounting hole 2. As a result, the assemblability is deteriorated, and the elastic piece 6 is easily broken during press fitting. Further, the rotor 5 is axially restricted in position by the engaging claw 6a of the elastic piece 6, but a slight margin is secured between the engaging claw 6a and the stator 1 in order to ensure snap-in. Therefore, there is a risk that the rotor 5 may rattle during rotation.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a rotary operation type electric component in which the snap-in structure is suitable for thinning and the rattling at the time of rotation of the rotor is suppressed. It is in.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an elastic piece made of synthetic resin, which has an outward engaging claw at a tip end thereof and extends along the axial direction of the rotor on either one of the rotor and the stator. Snap-in in which a plurality of projections are provided, and on the other side, a cylindrical mounting hole for elastically contacting these elastic pieces with the inner wall surface is formed, and the elastic pieces are press-fitted into the mounting holes for engagement. In the rotary operation type electric component for rotatably attaching the rotor to the stator, the elastic member made of synthetic resin that extends outward from the base of the elastic piece to support the elastic piece is attached to the member having the elastic piece. Armed.

[0008]

[Action]

 According to the above means, when the elastic piece is shortened to reduce the thickness and the flexibility is weakened, the elastic piece extending while bending the elastic arm while bending the elastic piece as a whole makes the whole. Sufficient flexibility is obtained, and snap-in can be easily performed. Further, when the rotor is attached to the stator by adopting such a snap-in structure, the rotor can be restrained in the axial direction by the elastic force of the elastic arms, so that rattling at the time of rotation is suppressed.

[0009]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a cross-sectional view of a rotary switch according to an embodiment, FIG. 2 is a plan view of the rotary switch, and FIG. 3 is a cross-sectional view of an essential part when the rotary switch is assembled. The same reference numerals are given to the portions corresponding to 4 and 5. Note that FIG. 1 shows a cross section taken along the line BB of FIG.

In the rotary switch shown in FIGS. 1 and 2, the elastic pieces 6 extending along the axial direction at the inner peripheral portion of the rotor 5 are shortened in order to realize a thin structure. Since two elastic arms 7 are extended outward, and the snap-in structure on the rotor 5 side is devised so that the elastic pieces 6 are supported via these elastic arms 7, this rotor 5 is The flexibility required for mounting the device on the No. 1 is ensured. That is, the elastic pieces 6 which have outward engaging claws 6a at the tip end thereof and which extend in the axial direction are projectingly provided at three equally spaced locations on the inner peripheral portion of the rotor 5. Elastic arms 7 extending along the plane of rotation of the rotor 5 are radially formed on the outer side of the rotor 6, and the base of each elastic piece 6 is supported by two elastic arms 7, respectively, as shown in FIG. As described above, the elastic piece 6 can be flexed while the elastic arm 7 is flexed, so that sufficient flexibility can be obtained as a whole.

On the other hand, in the stator 1 in which the concentric current collecting patterns 3 are arranged around the cylindrical mounting hole 2 and the terminals 4 are provided to project laterally, the diameter of the mounting hole 2 is equal to that of the rotor 5. Since each elastic piece 6 is set to a size such that it can be inserted while being bent inward, the elastic piece 6 is press-fitted into the mounting hole 2 by utilizing the bending of the elastic arm 7 as shown in FIG. When each of the engaging claws 6a penetrates the mounting hole 2, each elastic piece 6 makes elastic contact with the inner wall surface of the mounting hole 2, and the rotor 5 is regulated in the radial direction and the axial direction. Attached to 1. Further, since the rotor 5 thus mounted on the stator 1 is not restricted in position in the circumferential direction, it is rotatable, and therefore each elastic piece 6 can be slid along the inner wall surface of the mounting hole 2. When the rotor 5 is rotated, a slider (not shown) made of a thin metal plate fixedly mounted on the rotor 5 comes into contact with and separates from the current collecting pattern 3 of the stator 1, so that the rotational position of the rotor 5 is increased. The desired switching can be performed according to the above.

As described above, in the above embodiment, when the elastic piece 6 is press-fitted into the mounting hole 2 in order to mount the rotor 5 on the stator 1, both the elastic piece 6 and the elastic arm 7 supporting the elastic piece 6 bend. Therefore, the flexible piece 6 is shortened in order to make the product thin, and the flexibility of the elastic piece 6 itself is weakened. Can be easily performed, and there is no concern that the elastic piece 6 or the elastic arm 7 will be damaged during press fitting. The rotor 5 thus mounted on the stator 1 is axially restricted by the engaging claws 6a of the elastic piece 6, but the rotor 5 is also axially positioned by the elastic force of the elastic arm 7. Since it is regulated, rattling is less likely to occur during rotation, which can be expected to improve operability and reliability.

Note that elastic pieces or elastic arms for snap-in may be provided in the stator, and mounting holes for press-fitting the elastic pieces may be provided in the rotor.

Further, it goes without saying that the present invention can be applied to rotary operation type electric parts other than the rotary switch, for example, rotary type variable resistors.

[0015]

[Effect of device]

 As described above, the elastic pieces extending outward from the base of the elastic pieces for snap-in support the elastic pieces, and when the rotor is attached to the stator, both the elastic pieces and the elastic arms are flexed. According to the present invention, which has been made possible, even if the elastic piece is shortened in order to make the product thinner, sufficient flexibility can be obtained as a whole, so snap-in can be easily performed and damage accidents can be avoided. Also, since the rotor position can be restricted in the axial direction by the elastic force of the elastic arm after mounting, rattling at the time of rotation of the rotor can be suppressed, and as a result, the snap-in structure is suitable for thinning and operation. It is possible to provide an excellent rotary operation type electric component which is improved in reliability and reliability.

[Brief description of drawings]

FIG. 1 is a sectional view of a rotary switch according to an embodiment.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a cross-sectional view of a main part of the same embodiment at the time of assembly.

FIG. 4 is a cross-sectional view showing a conventional example.

FIG. 5 is a plan view of the conventional example.

[Explanation of symbols]

 1 Stator 2 Mounting Hole 5 Rotor 6 Elastic Piece 6a Engaging Claw 7 Elastic Arm

Claims (1)

[Scope of utility model registration request] 1. A plurality of synthetic resin elastic pieces projectingly provided along one of the rotor and the stator and having an outward engaging claw at a tip end thereof and extending along the axial direction of the rotor,
On the other hand, a cylindrical mounting hole for elastically contacting the elastic pieces with the inner wall surface is opened, and the elastic piece is press-fitted into the mounting hole so that the elastic pieces are snap-in to engage the rotor. In the rotary operation type electric component rotatably attached to the stator, the member having the elastic piece is provided with an elastic arm made of synthetic resin that extends outward from the base of the elastic piece and supports the elastic piece. Rotating operation type electric parts.