KR820001350Y1 - Rotary switch - Google Patents

Abstract

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Description

Stator attachment structure of rotary switch

1 is an enlarged view illustrating main parts of a stator attachment structure of a conventional rotary switch.

Figure 2 is an enlarged view of the main portion of the stator of the rotary switch according to the present invention.

3 is a partially broken perspective view of a chassis.

4A and 4B are sectional views taken on line A-A 'and B-B', respectively, in FIG.

5 is a perspective view of the stator fixed to the chassis.

The present invention relates to an electrical switch, in particular a rotary switch in an improved arrangement for simple and reliable attachment of the chassis of electrical and electronic equipment.

In general, a rotary switch used in the tuner of a television receiver to select a local oscillation coil of a local oscillator circuit in response to a channel, for example a rotor 1 mounted on a switching shaft (not shown) as shown in FIG. And a plurality of local oscillation coils 2a, 2b, 2c, which are spaced apart from each other corresponding to the received channel. 2n, the contact pieces 3a, 3b, 3c... 3n extends radially outward from the periphery of rotor 1, and the contact pieces 3a, 3b, 3c... Local oscillating coils 2a, 2b, 2c corresponding to 3n; The stator 5, which is connected to 2n and has a plate-like configuration, is fixed and contacted by eyelets 6a and 6b on the side facing the rotor 1 and attached to the chassis 4 or the tuner frame in a known manner to be described later. Part 3a, 3b, 3c... The contact piece clips 7a and 7b having contacts 8a and 8b provided at their distal ends in the rotational trajectory of 3n are provided so that the desired local oscillation coils 2a, 2b, 2c. The contact piece clip is selectively connected to 7a and 7b while 2n rotates the rotating shaft.

In the conventional rotary switch as described above, the fixing member 5a is connected to the chassis 4 by one of the screw 9a, the nut 9b and the spring washer 9c or the eyelet (not shown) and to attach the stator 5 to the chassis 4, The stator 5 is provided with a fixing member 5a fixed at a position adjacent to the shaft end corresponding to 4.

However, the above-mentioned known device, in which the stator 5 is fixed to the chassis 4 by screws or eyelets, requires a screw 9a, a nut 9b and a washer 9c or an eyelet, so that the number of parts increases, thereby increasing the time in manufacturing. In addition, the cost of rotary switches is high.

Therefore, the main object of the present invention is to provide a rotary switch with an improved device for actually eliminating the disadvantages of the conventional rotary switch and easily and securely attaching the stator to the chassis of electrical and electronic equipment.

Another main purpose of the present invention is to provide a stator to something such as a chassis lamp of the type described above, which does not require separate parts such as screws, nuts, washers or eyelets to reduce the cost and time required to make a rotary switch. To provide a rotary switch.

It is still another object of the present invention to provide a rotary switch of the aforementioned type which is as stable and structurally simple as possible without stator loosening even after the rotary switch has been used for a long time.

In achieving this object according to a preferred embodiment of the present invention, a rotary switch is a stator having a plurality of protrusions extending outward from an edge of a side facing the corresponding surface such as a chassis to which a stator is attached. Include. The chassis is formed at a position corresponding to the protrusion of the stator having an opening or cut with a claw that is deformable and bent. By subjecting the claw to plastic deformation after insertion of the protrusion into the opening of the chassis, the protrusion of the stator remains firmly between the chassis and the claw, thus attaching the stator to the chassis. As such, the parts such as screws, nuts, washers, or eyelets, which are conventionally required for connecting the stator and the chassis, may be omitted. As a result, the time required for assembly is reduced and the cost of rotary switches is further reduced.

Hereinafter, an embodiment in which the present invention is applied to a rotary switch for selecting a tuner foot coil of a television receiver will be described in detail with reference to the drawings.

In FIG. 2, a preferred embodiment of the present invention is used for the selection of a local oscillation coil of a tuner for a television receiver. The rotary switch includes a rotor 11 attached to the axis of rotation (not shown) for simultaneous rotation and a plurality of local oscillating coils 12a, 12b, 12c... At the peripheral edges spaced from each other to match the received channel. 12n. Contact piece 13a, 13b, 13c... 13n extends radially outward from the peripheral edge of rotor 11 and corresponds to the corresponding local oscillation coils 12a, 12b, 12c... Are electrically connected to 12n respectively. Stator 15 made of an insulating material is attached to chassis 19 (FIG. 3) in the manner described below. The contact piece clips 17a and 17b each composed of a pair of elastic metal pieces are attached to the side ends of the stator 15 facing the rotor 11 by eyelets 16a and 16b. The pair of metal pieces for the contact piece clips 17a and 17b are further secured by the eyelets 16'a and 16'b as shown. The configuration of the rotary switch of FIG. 2 described so far is similar to that of the conventional rotary switch of FIG. 1 except for a new device for attaching the stator 15 to the chassis 19 directly related to the present invention and described in more detail below.

Stator 15 made of triangles of insulating resin material such as epoxy resins, phenolic resins, etc., has shaft ends 18a and 18b far from their ends to which contact clip clips 17a and 17b are attached. Chassis 19, a deformable metallic material, includes base portion 19 and sidewall portions 19b extending at right angles from base portion 19a as shown in FIG. 3. And when the stator 15 is attached to the chassis 19 in a direction perpendicular to the base portion 19a and the side wall portion 19b of the chassis 19, the stator 15 contacts the inner surfaces of the end portions 18a and 18b portions 19a and 19b of FIG.

Above the end 18a of the stator 15 in a position adjacent to the corner created by the intersection of the two ends 18a and 18b, a substantially rectangular protrusion 20a having a thickness greater than chassis 19 protrudes outward in a direction perpendicular to the base portion 19a. When the stator 15 is secured to the chassis 19 over the other end 18b at a position far away from the corner, the other nearly longitudinal protrusion 20b having a thickness greater than the chassis 19 protruding outward in a direction perpendicular to the side wall portion 19b of the chassis 19 Is provided.

With particular reference to FIG. 3, the distance between the bay portions 19a and the side wall portions 19b of the chassis 19 at the positions corresponding to the protrusions 18a and 18b of the stator 15 is provided in the center with claws 21a and 21b extending from the chassis 19, respectively. There is a square opening 22a and a cutout 22b.

The width ga of the spacing 23a is defined between one side of the claw 21a and the corresponding end of the opening 22a and the length da of the spacing is slightly larger than the thickness and length of the protrusion 20a of the stator 15, respectively. Thus the protrusion can be inserted in the gap 23a. The claw 21a has a length sufficient to maintain the sufficient strength and sufficient strength to connect the protrusions 20a even after the claw 21a is deformed. In a manner similar to that described above, the width of the gap 23b and the length db of the gap 23b between the claw 21b and the corresponding end of the cutout 22b are large enough to accommodate the protrusion 20b of the stator 15, and the claw 21b is deformed. The claw 21b is of sufficient size to allow sufficient contact with the protrusion 20b with sufficient tension.

To secure the connection between the stator 15 and the chassis 19, the protrusions 20a and 20b are provided with recesses 24a and 24b (FIG. 2) respectively formed in a direction parallel to the ends 18a and 18a and the claws 21a and 24b in the recesses 24a and 24b, respectively. It is desirable to have a width about larger than the thickness of the chassis 19 to accommodate 21b. The main parts 24a and 24b are provided with pointed portions 25a and 25b in the direction of the claws 21a and 21b, respectively, when the claws are bent toward the protrusions 20a and 20b as shown in FIGS. As soon as the claws 21a and 21b are deformed or bent toward the parts 20a and 20b, the short axis of the claws 21a and 21b contacts the recesses 24a and 24b of the protrusions 20a and 20b over the entire length of the protrusions, which leads to stator 15 due to local forces. It is desirable to prevent it from breaking.

In the above arrangement, in order to attach the stator 15 to the chassis 19, the protrusions 20a and 20b of the stator 15 are inserted into the gaps 23a and 23b of the chassis 19, respectively, and the claws 21a and 21b are moved to the positions indicated by the dotted lines in FIG. To the position indicated by the solid line, forcibly deformed or bent by a suitable device such as a screwdriver (not shown). Thus, the tips of the claws 21a and 21b are fixed to the recesses 24a and 24b of the protrusions 20a and 20b, and the claws 21a and 21b press the pointed portions 25a and 25b of the recesses 24a and 24b so that the stator 15 ends and the openings of the claws 21a and 21b. The protrusions 20a and 20b of the stator 15 held between the corresponding ends of 22a and the cutout 22b are firmly attached to the chassis 19, respectively.

As can be seen from the above description, since the attachment position of the stator 15 is defined by the recesses 24a and 24b of the protrusions 20a and 20b according to the device of the present invention, separate parts such as screws, nuts or eyelets, etc. You can easily fix it to chassis 19 without using it. The sharp parts 25a and 25b of the recesses 24a and 24b are almost uniformly pressured by the claws 21a and 21b, and the stator 15 is firmly attached to the chassis 19 with high accuracy.

As described above, in order to prevent the stator 15 from tilting in the direction of the arrow of Fig. 6, that is, the direction in which the claw 21b is bent, the chassis 15 is not inclined and the chassis is perpendicular to the parts 19a and 19b of the chassis. Trapezoid protrusion extending outward from stator 15 to stator 15 in such a way that after stator 15 is secured to chassis 19, one surface of protrusion 15a contacts the corresponding surface of base portion 19a of chassis 19 to ensure attachment thereto. Preferably, part 15a (FIGS. 2 and 6) is also provided.

In the above-described embodiment, the recesses 24a and 24b in the protrusions 20a and 20b may be eliminated or modified, for example, in the configuration from the rectangular to various other recesses, and the protrusions 20a and 20b, the corresponding openings 22a. And cutouts 22b and claws 21a and 21b may also be modified within the scope of the present invention in number or shape so long as stator 15 is firmly attached to chassis 19.

Although the above-described embodiment of the present invention has been described with respect to a rotary switch for selecting a local oscillation coil, the concept of the present invention is not limited to application to such a rotary switch for selecting a local oscillation coil, but for various purposes, Easy to adapt to other rotary switches.

As is clear from the above description, in the rotary switch according to the present invention, the claws provided in the openings or cutouts in the chassis toward the protrusions of the stator to maintain such protrusions of the stator between the claws and the chassis or Since the stator is such a structure that the stator is firmly attached to the chassis with high accuracy by bending, various effects can be obtained as follows.

(i) The stator can be reliably and easily attached to the chassis through simple deformation of the claw by using a suitable device, such as a screwdriver, without the use of separate fixing parts such as nuts, nuts and eyelets. Simplify the process and reduce the number of parts and the overall cost.

(ii) By providing recesses in the protruding portions of the stator, the attachment position of the stator is limited by these recesses and thus the stator can be fixed to the chassis with high accuracy.

(iii) Since in the above-described recesses a pointed portion is provided which causes the claw to press the protrusion almost evenly, the contact area between the claw and the stator is increased to firmly connect the additional stator to the chassis.

(iv) The provision of a protrusion on the stator also prevents the stator from tilting because the protrusion contacts the corresponding surface of the chassis after the stator is attached to the chassis.

Claims (1)

A rotor on a rotatable shaft, such as a rotating shaft, a rotor on a rotatable shaft, a plurality of contact pieces extending radially outwardly from the main end of the rotor, a chassis having at least two sides spaced apart from the rotor and joined at right angles to each other, a chassis facing the rotor For a television tuner consisting of a plate-shaped stator having an end positioned between the faces of the rotor and a plurality of contact clips which are at the end of the stator facing the rotor and which can be selectively engaged with the contact pieces on the rotor when rotating on the axis of rotation. In a rotary switch, the stator has protrusions along each end adjacent to the chassis for attaching the stator to the chassis, and the chassis has a plurality of openings, one on each side, for receiving the protrusions of the stator. At least one of the openings is a hole in one of the faces, At least one is cut out from one end of one of the faces, and the sash also has a claw member that can be deformed in each of the openings, thereby inserting a protrusion through the opening and deforming the claw member with a recess in the protrusion. A rotary switch for a television tuner, characterized by attaching an estate agent.