JP3708307B2 - Rotating operation type electronic component with push switch and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is provided with a push switch for rotating and vertically moving an operation shaft, such as a combination of a rotary operation type electronic component and a circuit switching push switch used mainly for volume adjustment and timer adjustment in audio equipment, video equipment, etc. The present invention relates to a rotary operation type electronic component and a manufacturing method thereof.
[0002]
[Prior art]
A conventional technology of this type of electronic component will be described with reference to FIGS. 6 to 9 by taking a rotary operation type encoder with a push switch as an example.
[0003]
FIG. 6 is a front sectional view of a conventional rotary operation type encoder with a push switch. In FIG. 6, reference numeral 1 denotes an operation shaft made of a metal rod, which is inserted into the circular hole 2A of the bearing 2 from the upper end to rotate and move vertically. The intermediate circular portion 1A is fitted and held so as to be able to perform the operation. Reference numeral 3 denotes a rotating contact body made of a molded resin, and a disc portion 3A having a flat contact plate 4 on the lower surface and a vertical center of the disc portion 3A. The cylindrical portion 3B is inserted into the circular hole 2A of the bearing 2 from the lower end, and its outer shape is fitted and held so as to be capable of rotational movement.
[0004]
Then, the non-circular through-hole 3C of the cylindrical portion 3B is fitted with the non-circular small-diameter portion 1B below the operation shaft 1 so that the rotational motion is transmitted but the vertical motion is not transmitted, and the disc portion 3A. A C-shaped washer 5 as shown in the perspective view of FIG. 7 is inserted into the groove portion 1D of the operation shaft 1 protruding downward from the tapered portion of the lower end portion 1C to form a retaining portion of the operation shaft 1. Yes.
[0005]
Further, on the lower surface of the disk portion 3A of the rotating contact body 3, as shown in FIG. 8 which is a cross-sectional view taken along the line AA in FIG. 6, a central circle portion 4A and a plurality of linear portions radially extended therefrom. A flat contact plate 4 made of 4B is insert-molded and fixed, and elastic contacts 8A and 8B at the tips of three elastic legs 7A and 7B and 7C extended from a fixed substrate 6 facing each other at a predetermined interval. , 8C elastically contact the central circular portion 4A and the linear portion 4B of the flat contact plate 4 to form a rotating component portion (encoder portion) 9, and the positions of the elastic contacts 8B, 8C are slightly shifted in the rotational direction. Is set to
[0006]
Further, a switch substrate 10 is disposed below the fixed substrate 6, and a central fixed contact 11A concentric with the operation shaft 1 and an outer peripheral fixed contact 11B at the outer peripheral position are inserted into the recess 10A at the center of the upper surface by insert molding. The lower end of the outer periphery of the dome-shaped movable contact 12 made of an elastic thin metal plate is placed on the outer peripheral fixed contact 11B to constitute the push switch unit 13 and the upper part of the dome-shaped movable contact 12 is The lower end portion 1C of the operation shaft 1 is in contact with the push plate 14, and in this state, the C-shaped washer 5 inserted into the groove portion 1D of the operation shaft 1 is the disc portion 3A of the rotary contact body 3. Is in contact with the top of the concave portion of the lower surface.
[0007]
Then, the bearing 2, the fixed substrate 6 and the switch substrate 10 are overlapped and sandwiched between the legs of the U-shaped mounting bracket 15 from above the bearing 2, and the leg tip 15A is bent on the back surface of the switch substrate 10. The whole is connected and fixed.
[0008]
Next, the operation of the rotary operation type encoder with push switch will be described. First, by rotating the upper tip 1E of the operation shaft 1, the rotary contact body 3 is rotated along with the rotational movement of the operation shaft 1. The three elastic contacts 8A and 8B, 8C slide on the central circle 4A and the linear portion 4B with respect to the flat contact plate 4 on the lower surface, and terminals 16A and 16B connected to the respective contacts are provided. A pulse signal is output between 16A and 16B of 16C and between 16A and 16C, and functions as the rotating component unit 9.
[0009]
During this rotation operation, the operation shaft 1 does not move up and down, and the push switch unit 13 does not operate.
[0010]
Next, when the operating shaft 1 is moved downward by applying a pressing force to the upper tip 1E of the operating shaft 1 as indicated by an arrow in the sectional view of FIG. 9, the lower end 1C of the operating shaft 1 is dome-shaped via the push plate 14. The push switch unit 13 is operated by pushing the movable contact 12.
[0011]
At this time, the rotating contact member 3 of the rotating component unit 9 does not move downward and of course does not rotate, so that the rotating component unit 9 does not operate.
[0012]
[Problems to be solved by the invention]
However, in the conventional rotary operation type electronic component with push switch (rotary operation type encoder with push switch), the C-shaped washer 5 is inserted into the groove 1D below the operation shaft 1 to prevent the operation shaft 1 from coming off. Although the assembly is formed, this method requires the C-shaped washer 5 and the insertion work is an operation of inserting the C-shaped washer 5 into the small-diameter groove portion 1D in the concave portion on the lower surface of the rotating contact body 3. Therefore, there is a problem that it is very difficult and it is difficult to confirm the insertion state of the C-shaped washer 5.
[0013]
The present invention solves such a conventional problem, and a rotary operation type electronic device with a push switch that can easily assemble and form a retaining portion of an operation shaft without using a separate part such as a C-shaped washer. An object of the present invention is to provide a component and a manufacturing method thereof.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the rotary operation type electronic component with push switch according to the present invention has a rotating component in a non-circular engagement portion and a recess for engagement provided below the operation shaft fitted and held in a circular hole of the bearing. By engaging the non-circular holding part and the elastic claw part of the rotating contact body of the part, the operating shaft and the rotating contact body are coupled together so that the operating shaft can move up and down within a certain range, The rotating component part and the push switch part below the rotating part part are rotated and pushed, respectively.
[0015]
As a result, it is possible to realize a rotary operation type electronic component with a push switch and a method for manufacturing the same, in which the retaining portion of the operation shaft can be easily assembled without using a washer or the like.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a bearing having a circular through hole, and a circular intermediate hole is fitted and held in the circular through hole of the bearing so as to be rotatable and vertically movable, and an upper end portion projects upward from the bearing. And an operating shaft having a non-circular engaging portion and an engaging concave portion below, and a non-circular holding portion that fits into the non-circular engaging portion of the operating shaft on the upper surface of the disc portion and an engaging concave portion of the operating shaft. A rotating contact body having an elastic claw portion to be inserted and a rotating contact body having a movable contact on the lower surface, a rotating component portion formed of a fixed substrate having a fixed contact that engages with the movable contact and generates an electrical signal, and a lower portion of the rotating component portion Rotating operation with a push switch consisting of a push switch part that is arranged on the operating shaft and operates by being pushed at the lower end of the operating shaft, and a U-shaped mounting bracket that connects and fixes the bearing, the rotating part part and the push switch part from the outside Type electronic components The operation shaft retaining part is fitted with the engaging claw of the operation shaft by fitting the elastic claw part of the rotating contact body into the engagement recess of the operation shaft, so that the operation shaft retaining part can be used without using another part such as a washer. As a result, it is possible to realize a rotary operation type electronic component with a push switch that is inexpensive and has good assembly workability.
[0017]
The invention according to claim 2 is the invention according to claim 1, wherein the outer periphery of the elastic claw portion of the rotating contact body is abutted and fitted to the inner wall of the circular through hole of the bearing, and is strong against the operation shaft. When a pulling force is applied, the elastic claw is not opened outward because it is in contact with the inner wall of the circular through-hole of the bearing even if the elastic claw is trying to open outward from the engaging recess of the operating shaft. Has the effect of making it difficult to remove.
[0018]
According to a third aspect of the present invention, the non-circular holding portion and the elastic claw portion of the rotating contact body are engaged with the non-circular engaging portion and the engaging recess of the operating shaft in advance to connect the operating shaft and the rotating contact body. The rotating operation type electronic component with a push switch according to claim 1 or 2, wherein the operating shaft with a rotating contact body is assembled by inserting into the circular through hole of the bearing from the upper end portion of the operating shaft. This has the effect that the elastic claw portion of the rotary contact body can be easily and securely fitted into the engaging recess of the operation shaft.
[0019]
According to a fourth aspect of the present invention, in the invention of the third aspect, the component parts of the push switch part and the fixed substrate of the rotating part part are temporarily coupled to form a switch block, and from the bottom with the U-shaped mounting bracket as a reference. A bearing, an operating shaft with a rotating contact body, and a switch block are stacked and combined one after the other. The whole part is sandwiched between the legs of the U-shaped mounting bracket, and the legs are bent at the back of the switch block so that the members are connected and fixed. Because it is possible to assemble rotary operation type electronic parts with push switches from one direction with reference to the U-shaped mounting bracket, it is possible to perform efficient assembling work and easy to assemble with an automatic machine. Has an effect.
[0020]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5 by taking a rotary operation type encoder with a push switch as an example.
[0021]
In the present embodiment, the same components as those described in the section of the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.
[0022]
(Embodiment 1)
FIG. 1 is a front sectional view of a rotary operation type encoder with a push switch according to a first embodiment of the present invention. In FIG. 1, reference numeral 21 denotes an operation shaft made of a metal die casting or the like, and FIG. As shown in the upper part of the external perspective view of FIG. 1, the upper part from the middle part is a circular part 21A, and the lower part is a projecting part 21B as two non-circular engaging parts symmetrical with respect to the circular center. It has a pair of recesses 21C for engagement at right angles and has a circular lower diameter portion 21D at the lower end. The lower portion of the circular portion 21A can be rotated and moved up and down to a circular through hole 22A of a bearing 22 made of metal die casting or the like. The upper end of the upper end protrudes upward from the bearing 22 and constitutes an operation portion 21E.
[0023]
On the other hand, 23 is provided with a center hole 23B through which the circular small-diameter portion 21D at the lower end of the operation shaft 21 is inserted at the center of the disc portion 23A, and a flat contact similar to that of the prior art on the lower surface of the disc portion 23A. A rotating contact body made of molded resin that fixes the plate 4 by insert molding or the like. As shown in the lower part of the external perspective view of FIG. The groove portion 23D provided as the holding portion rotates together with the projections 21B as the two non-circular engaging portions of the operation shaft 21, but is fitted so as to be movable up and down, and is provided at a position perpendicular to this. The pair of elastic claws 23E are fitted into the pair of engaging recesses 21C of the operation shaft 21 to form a retaining portion, thereby restricting the vertical movement of the operation shaft 21 within a certain range.
[0024]
A method of combining and coupling the rotary contact body 23 with the operation shaft 21 is as follows. In the state where both are single pieces as shown in FIG. 2A, the circular shape of the operation shaft 21 is inserted into the center hole 23B of the rotary contact body 23. A pair of elastic claws of the rotating contact body 23 is inserted by inserting the diameter portion 21D and combining the two protrusions 21B of the operating shaft 21 with the two groove portions 23D of the rotating contact body 23. 23E can be easily and reliably fitted into the engaging recess 21C of the operating shaft 21 while opening due to its elasticity, so that the operating shaft 24 with a rotating contact body can be obtained as shown in FIG. 2 (b).
[0025]
Then, three elastic contacts 8 extended from the lower fixed substrate 6 facing the planar contact plate 4 on the lower surface of the disk portion 23A of the rotating contact body 23 with a predetermined interval are respectively formed on the planar contact plate 4. The rotating component part (encoder part) 25 is formed in elastic contact with the central circular part and the linear part (both not shown) as in the case of the prior art.
[0026]
Furthermore, a central fixed contact 11A and an outer peripheral fixed contact 11B are fixed to the upper surface of the switch substrate 10 disposed below the fixed substrate 6 by insert molding, and a dome-shaped movable contact made of an elastic metal thin plate is placed on the outer peripheral fixed contact 11B. The push switch portion 13 is configured by being mounted on the dome-shaped movable contact 12 at the center of the rotary contact body 23 via the push plate 14. The circular thin-diameter portion 21D of the operating shaft 21 that protrudes downward through the hole 23B is in contact. In this state, the elastic claw portion 23E of the rotating contact body 23 is the lower end in the engaging recess 21C of the operating shaft 21. Located in the department. In other words, the operating shaft 21 is located at the upper end of the up and down movable range.
[0027]
Then, the bearing 22, the fixed board 6 and the switch board 10 arranged as described above are overlapped and sandwiched between the legs of the U-shaped mounting bracket 15 extended from above the bearing 22, and the whole is connected and fixed. It is the same as in the case of the prior art.
[0028]
The operation of the rotary operation type encoder with push switch configured as described above will be described.
[0029]
First, when the operation portion 21E of the operation shaft 21 is rotated, the rotary contact body is provided via the groove portion 23D of the wall portion 23C which is a non-circular holding portion fitted to the projection 21B which is a non-circular engagement portion of the operation shaft 21. 23 rotates together, the elastic contact 8 elastically slides against the flat contact plate 4 on the lower surface thereof, and outputs a pulse signal between the terminals 16 connected to each contact, thereby rotating part (encoder part) It functions as 25.
[0030]
Then, the operation shaft 21 does not move up and down during this rotation operation, and the push switch unit 13 does not operate, as in the case of the prior art.
[0031]
3, when a downward pressing force is applied to the operation portion 21E of the operation shaft 21 as indicated by an arrow, the projection 21B of the operation shaft 21 has a groove 23D of the wall portion 23C of the rotary contact body 23. The tip of the circular small diameter portion 21D that moves downward while being guided by the inner periphery and protrudes downward from the center hole 23B of the rotary contact body 23 pushes the dome-shaped movable contact 12 through the push plate 14 of the push switch portion 13. The center fixed contact 11A and the outer peripheral fixed contact 11B are connected to operate the push switch unit 13.
[0032]
When the pushing force applied to the operating portion 21E of the operating shaft 21 is removed, the push plate 14, that is, the operating shaft 21 is pushed up by the elastic restoring force of the dome-shaped movable contact 12 to return to the original state of FIG.
[0033]
During the push operation of the operating shaft 21, the rotating contact body 23 of the rotating component unit 25 does not move downward and of course does not rotate, so that the rotating component unit 25 does not operate as in the case of the prior art.
[0034]
As described above, according to the present embodiment, it is possible to provide a rotary operation type electronic component with a push switch in which the retaining portion of the operation shaft can be easily assembled at low cost.
[0035]
In the present embodiment, the outer wall of the elastic claw 23E of the rotary contact 23 constituting the retaining portion of the operation shaft 21 is made substantially the same as the inner diameter of the circular through hole 22A of the bearing 22, and the inner wall of the circular through hole 22A. When a strong pulling force is applied to the operating shaft 21, the inner wall of the circular through-hole 22A can be opened even if the elastic claw 23E tries to come out of the engaging recess 21C of the operating shaft 21 and open outward. Further, since the outer periphery of the elastic claw portion 23E is suppressed, the opening of the elastic claw portion 23E can be restricted, and the removal strength of the operation shaft 21 can be increased.
[0036]
In the above description, the case where the rotating component unit is a rotary operation type encoder has been described as an example, but it goes without saying that this may be another electronic component such as a rotary operation type variable resistor.
[0037]
(Embodiment 2)
FIG. 4 is a cross-sectional view for explaining a method of manufacturing a rotary operation type encoder with a push switch according to the second embodiment of the present invention. As shown in FIG. The cylindrical portion 22B and the base portion 22C of the bearing 22 are respectively fitted from the lower side between the upper surface central hole 15B and the opposed leg portions 15C, and then the operation shaft 21 and the rotary contact body 23 are coupled in advance in the form of a single piece. The operating portion 21E of the operating shaft 21 of the operating shaft with rotating contact body is inserted and fitted into the circular through hole 22A of the bearing 22 from below, and finally the switch block 26 is fixed with the fixed substrate 27 side facing upward from below. Rotating operation type encoder with push switch by fitting into the opposite leg portion 15C of the U-shaped mounting bracket 15 and bending the leg tip 15A at the back surface of the switch board 28. It is intended to be completed as.
[0038]
As shown in FIG. 5, the switch block 26 has the dome-shaped movable contact 12 and the push plate 14 placed in the recess 28 </ b> A at the center of the upper surface of the switch substrate 28, and then the fixed substrate 27 of the rotating component portion 29. The dowels 27A provided on the lower surface of the fixed substrate 27 made of molded resin are passed through the stepped holes 28B provided in the switch substrate 28, and the dowels 27A protruding into the stepped holes 28B on the back side of the switch substrate 28 are provided. The tip is joined by caulking.
[0039]
In this way, the component parts of the push switch unit 30 and the fixed substrate 27 of the rotary component unit 29 are integrated in advance as the switch block 26, so that the rotary operation type electronic component with push switch can be used as a reference with the U-shaped mounting bracket 15. As all the parts can be assembled from one direction, an efficient assembling work can be performed and an automatic machine can be easily assembled.
[0040]
【The invention's effect】
As described above, according to the present invention, the retaining portion of the operation shaft can be easily assembled and formed without using a C-shaped washer or the like. This provides an advantageous effect that it is possible to provide a rotary operation type electronic component with a large push switch.
[Brief description of the drawings]
FIG. 1 is a front cross-sectional view of a rotary operation encoder with a push switch which is a rotary operation electronic component with a push switch according to a first embodiment of the present invention. FIG. 3 is a perspective view of the rotating contact body in which the operating shaft and the rotating contact body are coupled together. FIG. 3 is a front sectional view of the rotating contact body pressed. Sectional drawing explaining the manufacturing method of the rotary operation type encoder with a push switch by a form. FIG. 5 is sectional drawing explaining the method to block the push switch part which is the principal part. FIG. 7 is a front sectional view of a rotary operation type encoder with a push switch, which is a type electronic component. FIG. 7 is a perspective view of a C-shaped washer that is the main part. ] When the same operating axis is pressed A cross-sectional view DESCRIPTION OF SYMBOLS
4 Flat contact plates 6, 27 Fixed substrate 8 Elastic contacts 10, 28 Switch substrate 11A Center fixed contact 11B Outer periphery fixed contact 12 Dome-shaped movable contact 13, 30 Push switch portion 14 Push plate 15 U-shaped mounting bracket 15A Leg tip 15B Upper surface center hole 15C Leg 16 Terminal 21 Operation shaft 21A Circular portion 21B Protrusion 21C Engaging recess 21D Circular thin diameter portion 21E Operation portion 22 Bearing 22A Circular through hole 22B Cylindrical portion 22C Base 23 Rotating contact body 23A Disk portion 23B Center Hole 23C Wall portion 23D Groove portion 23E Elastic claw portion 24 Operation shafts with rotary contact body 25, 29 Rotary component portion (encoder portion)
26 Switch block 27A Dowel 28A Recess 28B Stepped hole

Claims (4)

A bearing having a circular through hole, and a circular intermediate hole fitted and held in the circular through hole of the bearing so as to be able to rotate and move up and down. An operating shaft having a recess, a non-circular holding portion that fits into a non-circular engaging portion of the operating shaft on the upper surface of the disc portion, and an elastic claw portion that fits into the engaging recess of the operating shaft, and a movable contact on the lower surface A rotating component part formed of a fixed substrate having a rotating contact body and a fixed contact that engages with a movable contact and generates an electric signal, and is disposed below the rotating component part and pressed by a lower end portion of an operation shaft. Rotating operation type electronic component with push switch comprising a push switch portion that operates by being operated, and a U-shaped mounting bracket that connects and fixes the bearing, the rotating component portion, and the push switch portion from the outside. The rotary operation type electronic component with a push switch according to claim 1, wherein the outer periphery of the elastic claw portion of the rotary contact body is in contact with and fitted to the inner wall of the circular through hole of the bearing. An operation shaft with a rotating contact body, in which the non-circular holding portion and the elastic claw portion of the rotating contact body are engaged with the non-circular engaging portion and the engaging recess of the operating shaft in advance to connect the operating shaft and the rotating contact body, is operated. The method of manufacturing a rotary operation type electronic component with push switch according to claim 1 or 2, wherein the rotary operation type electronic component with push switch is assembled by being inserted into a circular through hole of a bearing from an upper end portion of the shaft. The components of the push switch part and the fixed board of the rotating part part are temporarily joined to form a switch block. From the bottom of the U-shaped mounting bracket, the bearing, the operating shaft with rotating contact body, and the switch block are stacked and combined in order. The manufacturing method of the rotary operation type electronic component with a push switch according to claim 3, wherein the members are connected and fixed by sandwiching the whole with the legs of the U-shaped mounting bracket and bending the ends of the legs on the back surface of the switch block.

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