JPH05166433A - Manufacture of slider receptacle for electric part with click feeling - Google Patents

Abstract

PURPOSE:To provide an electric part with a click feeling excellent in assembly workability with high position accuracy between a slider piece and a click spring. CONSTITUTION:After a different shape material 34, having a thick part 34a and a thin part 34b, is obtained from a metal flat plate, a blank material 35 is obtained by respectively performing a blank die of a click spring 5 and a terminal 28 in the thick part 34a and of a slider piece 4 in the thin part 34b, and next this blank material 35 is drawn out to mold a synthetic resin material integrally formed with the blank material 28. After opening a mold, a slider piece 4 and a necessary part of the click spring 5 and the terminal 28 are folded, and by cutting off an unnecessary part of the blank material 35 removed, a slider receiver 6 having the slider 14, click spring 5 and the terminal 28 is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a slider receiver provided in an electric component with a click feeling such as a switch and a variable resistor.

[0002]

2. Description of the Related Art This kind of electronic component with a click feeling, for example, a rotary switch, includes a contact switching mechanism that generates a pulse signal by repeating contact and separation between a movable contact and a slider piece (fixed contact), and an elastic member. And a concavo-convex portion are repeatedly engaged and disengaged to provide a click mechanism, and both mechanisms are provided on a pair of cord plates and slider receivers. 58-60
It is disclosed in Japanese Patent No. 827.

In the rotary switch described in the above publication, a slider piece having terminals is fixed to a slider receiver made of synthetic resin, and a ball elastically urged by a spring is stored and held. A movable contact that comes into contact with and separates from the slider piece is outserted to a code plate made of synthetic resin, and tooth-shaped uneven portions that engage and disengage with the ball are formed on the periphery. In use, when the cord plate is rotated in either the forward or reverse direction, the sliding piece repeatedly contacts and separates from the movable contact to perform contact switching operation.During this operation, the ball engages and disengages with the uneven portion. A click feeling is generated by repeating.

[0004]

According to the above-mentioned conventional example, since the contact switching mechanism and the click mechanism can be provided on the pair of code plates and the slider receiver, the number of parts can be reduced. It is also advantageous for downsizing. However,
Since the slider piece with the terminal provided on the slider receiver and the ball are separate parts, it is difficult to maintain the relative position of both with high accuracy even if guide means such as a guide groove is provided. Therefore, even if the relative position between the movable contact on the code plate side and the concavo-convex portion is maintained with high accuracy, there is a problem in that the interlocking between the contact switching operation and the click feeling deteriorates. Further, a method of using a click spring formed by forming an elastic plate in place of the above-mentioned spring and ball as an elastic member and caulking and fixing this click spring to a slider receiver has also been proposed. Since a predetermined clearance is required between the caulking hole and the caulking pin of the slider receiver, not only does the same problem as described above occur, but there is also the problem that workability deteriorates due to the process required for caulking and fixing. It was In addition, such a problem is not limited to the rotary switch, and there is a problem that the interlocking between the change in the resistance value and the click feeling is deteriorated in other electric parts with a click feeling, for example, a variable resistor.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to improve the positional accuracy between the slider piece and the click spring, and to improve the assembling workability. It is to provide parts.

[0006]

In order to achieve the above object, the present invention provides a step of forming a profile having a thin portion and a thick portion from a flat metal plate, and a step of forming a slider piece on the thin portion. Pressing out the outer shape and pressing the outer shape of the click spring into the thick portion to form a blank material, the step of outserting this blank material to a synthetic resin base, and the need for the blank material And a step of cutting the portion.

[0007]

[Function] Since the slider piece and the click spring are formed by cutting out the same metal flat plate outserted to the base, the positional accuracy of both is extremely high, and the slider piece is made of metal. Since the flat spring is formed from the thin portion of the flat plate, a relatively light contact pressure can be realized. On the other hand, since the click spring is formed from the thick portion of the metal flat plate, a relatively heavy contact pressure can be realized. In addition, when the outer shape of the terminal is removed from the thick portion of the metal flat plate, a terminal that is not easily deformed by an external force can be formed at the same time.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a longitudinal sectional view of a rotary switch according to an embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a side view of an operating shaft, FIG. 4 is a front view of the operating shaft, and FIG. 6 is a front view of the code plate, FIG. 7 is a rear view of the code plate, FIG. 8 is a cross-sectional view of FIG. 7 along the line BB, and FIG. 9 is a slider receiver. FIG.

As shown in FIGS. 1 and 2, a rotary switch according to the present embodiment has a bearing body 1, an operating shaft 2 rotatably supported by the bearing body 1, and an integrated operation shaft 2. Cord plate 3, the slider piece 6 holding the slider piece 4 and the click spring 5, and the mounting plate 7 that integrates the bearing body 1 and the slider holder 6 with each other. It is composed of.

The bearing body 1 is made of a metal material such as zinc die-cast, and has a cylindrical bearing portion 8 having a screw thread on the outer peripheral surface.
And a storage portion 10 having a space 9 communicating with the bearing portion 8.
Positioning holes 11 are provided at the four corners of the storage unit 10. An operation shaft 2 made of a synthetic resin material is rotatably supported on the inner peripheral surface of the bearing portion 8. One end of the operation shaft 2 is integrally formed with a large-diameter flange portion 2a, and a flange is formed. A receiving hole 12 is provided at an arbitrary position of the portion 2a. In addition, a small diameter portion 2 having a circular cross section is provided at the center of the operation shaft 2.
b is integrally formed, and the tip of the small diameter portion 2b is formed on the flange portion 2
It projects more than a. As shown in FIGS. 3 to 5, an annular groove 13 extending in the axial direction is provided around the small-diameter portion 2b, and the small-diameter portion 2b has 360 degrees inside the groove 13.
It can be changed in all directions.

A code plate 3 is integrated with the operating shaft 2, and the code plate 3 is housed in a space 9 of the bearing body 1. The code plate 3 has a disk shape as a whole, and includes a substrate 14 made of a synthetic resin material, a movable contact 15 made of a metal thin plate outsert to the substrate 14, and a metal thin plate outserted to the substrate 14 as well. Sliding plate 1
6 and 6. As shown in FIGS. 6 to 8, a fitting hole 17 is provided at the center of the substrate 14, and a large number of cutouts 18 are formed at the outer peripheral edge of the board 14 at predetermined intervals in the circumferential direction. The movable contact 15 includes a ring-shaped common electrode 15a whose center coincides with the fitting hole 17, and a plurality of first comb tooth portions 15b radially extending from the common electrode 15a. A wide second comb tooth portion 19 integrally formed at the tip of the comb tooth portion 15b serves as the sliding plate 16. Each sliding plate 16 is located between the missing portions 18, and each missing portion 18 and each of the first and second comb tooth portions 15 are arranged.
b and 19 are set to the same number. The movable contact 15 and the sliding plate 16 are provided on one main surface (front surface) of the substrate 14 by the outsert molding method described later. At that time, the projection 20 is integrally formed on the back surface of the substrate 14. The projection 20 has the same circumferential dimension as the receiving hole 12 of the operating shaft 2 but a small radial dimension (see FIG. 4).

In the code plate 3 thus constructed, the fitting hole 17 is press-fitted into the small diameter portion 2b, and the projection 2 is formed.
By pressing 0 into the receiving hole 12, the operating shaft 2
Fixed to. At that time, since a clearance is maintained in the radial direction between the receiving hole 12 and the protrusion 20, a dimensional error is absorbed by this clearance, and the rotational force of the operation shaft 2 (that is, the force in the circumferential direction) is at the center. It is surely transmitted to the cord plate 3 through the two press-fitting portions of the fitting hole 17 and the outer protrusion 20.

The slider receiving member 6 is made of a synthetic resin material, and positioning pins 21 are projected from the four corners of the front and back surfaces, and a bearing hole 22 is formed at the center position. The centers of 22 and the bearing portion 8 are set so as to coincide with each other during assembly. On the other hand, the mounting plate 7 is made of a metal plate, and four holding pieces 2 are attached to the mounting plate 7.
3 (two of which are omitted in FIG. 2) and two holding legs 24 are bent in opposite directions, and positioning holes 25 corresponding to the positioning pins 21 are formed at four corners. .. The bearing body 1, the slider receiver 6 and the mounting plate 7 are provided with the positioning pins 21 and the positioning holes 1 respectively.
The holding pieces 23 are stacked in a state of being inserted into the holding pieces 1, 25, and are joined and integrated with each other by bending the holding pieces 23 inward along the ridge lines of the storage portion 10.

The slider receiving body 6 has a first escape hole 26.
And a second escape hole 27 are provided, and these escape holes 26 and 27 are located at positions facing each other through the bearing hole 22. As shown in FIGS. 2 and 9, a semicircular click spring 5 having a convex portion 5a at the center is arranged in the first escape hole 26, and both fixed ends of the click spring 5 are slidable. It is embedded inside the pendulum receiver 6. On the other hand, three slider pieces 4 serving as fixed contacts are arranged in the second escape hole 27, and the fixed ends of these slider pieces 4 are embedded inside the slider receiver 6. And each terminal 2
Reference numeral 8 extends outside the slider receiver 6. The click spring 5 and each terminal 28 have a thickness of about 0.25 m.
m is a relatively thick metal plate, and each of the slider pieces 4 is a thin metal plate of 0.12 mm having a thickness dimension of about half. The click spring 5, the slider piece 4 and the terminal 28.
Is integrated with the slider receiver 6 by an outsert molding method described later. The click spring 5 is pressed against the surface of the code plate 3 by its elasticity,
With the rotation, the convex portion 5a rides on the sliding plate (the second comb tooth portion 19) from the cutout portion 18 and falls into the cutout portion 18 again, and a click feeling is generated. In this case, since the click spring 5 is made of a thick metal plate, the click spring 5 comes into contact with the cord plate 3 with a relatively large sliding pressure, and the required operating force (click feeling) is obtained. Further, the first slider piece 4a of each slider piece 4 closest to the bearing hole 22 is pressed against the common electrode 15a of the code plate 3,
The remaining two second and third slider pieces 4b and 4c are pressed against the surface of the substrate 14 located between the first comb tooth portions 15b or the respective first comb tooth portions 15b. In this case, since each of the slider pieces 4a, 4b, 4c is made of a thin metal plate, the slider pieces 4a, 4b, 4c contact the cord plate 3 with a relatively small sliding pressure, and the contact life is extended. The contact points between the second and third slider pieces 4b and 4c and the code plate 3 are slightly deviated in the circumferential direction. In the case of this embodiment, the second slider piece 4b is the A phase. The third slider piece 4c for detection is taken out from the corresponding terminal 28 for B-phase detection. Since each terminal 28 is made of a thick metal plate, deformation due to an external force is prevented. Further, the tip of the small diameter portion 2b provided on the operation shaft 2 is rotatably fitted in the bearing hole 22 of the slider receiver 6, and the operation shaft 2 uses the bearing hole 22 to attach the tip of the small diameter portion 2b. In the positioned state, the outer peripheral surface is rotatably supported by the bearing portion 8 of the bearing body 1.

Next, the operation of the above embodiment will be described. When no external force is applied to the operation shaft 2, the cord plate 3
Stops when the convex portion 5a of the click spring 5 falls into the missing portion 18. In this case, the first slider piece 4
a is in contact with the common electrode 15a, and the second and third slider pieces 4b and 4c are the substrates 1 in the middle of the respective first comb tooth portions 15b.
Since the substrate 14 is in contact with the surface and the substrate 14 is an insulating synthetic resin material, there is an electrical connection between the first slider piece 4a and the second and third slider pieces 4b, 4c. It has been cut off.

Next, when the operating shaft 2 is rotated in one direction by a finger or the like, the cord plate 3 is also rotated. In this case, the operation shaft 2 is ensured to rotate freely by the bearing portion 8 of the bearing body 1, and the small diameter portion 2b is positioned (centered) by the bearing hole 22 of the slider receiver body 6. Therefore, the relative positions of the code plate 3 fitted and fixed to the small-diameter portion 2b, the click spring 5 and the slider pieces 4a to 4c integrated with the slider receiver 6 are maintained with high accuracy. There is. Even if the small diameter portion 2b is eccentric with respect to the shaft center when the operation shaft 2 is molded, this eccentricity is absorbed by the movement of the small diameter portion 2b in the concave groove 13 during assembly.

When the code plate 3 rotates, the first slider piece 4a always slides on the common electrode 15a during this rotating operation, but the second slider piece 4b moves from the surface of the substrate 14 to the first electrode piece 4a. The first comb-teeth portion 15b is contacted, and the surface of the substrate 14 and the first comb-teeth portion 15b are repeatedly contacted. Similarly, the third slider piece 4c also repeats contact with the surface of the substrate 14 and the first comb tooth portion 15b. Second slider piece 4
When b comes into contact with the first comb tooth portion 15b, the common electrode 15
Since the first and second slider pieces 4a and 4b are electrically connected to each other via a and the first comb tooth portion 15b, both slider pieces 4a and 4b are electrically connected.
A pulse for the A phase signal is detected from the terminal 28 connected to a and 4b. Further, when the third slider piece 4c comes into contact with the first comb tooth portion 15b, the first and third slider pieces 4a, 4c are passed through the common electrode 15a and the first comb tooth portion 15b.
Is conducted, the pulse for the layer B signal is detected from the terminal 28 connected to the slider pieces 4a and 4c. Which of the second slider piece 4b and the third slider piece 4c comes into contact with the first comb tooth portion 15b first is reversed depending on the rotation direction of the code plate 3, and thus the A phase signal The rotation direction of the code plate 3 is detected by determining the rising pulse of the B-phase signal, and the rotation amount of the code plate 3 is detected by counting the number of pulses.

When the code plate 3 rotates as described above, the convex portion 5a of the click spring 5 repeatedly moves over the sliding plate 16 and falls into the adjacent missing portion 18, and at that time, a click (moderation) feeling occurs. To be done. Missing part 18 and sliding plate 1
Since the number of 6 corresponds to the number of the first comb tooth portions 15b,
Each time the convex portion 5a goes over one sliding plate 16 and falls into the adjacent missing portion 18, the first slider piece 4a and the second and third slider pieces 4b, 4c are provided once, respectively. It will be conducted. Therefore, when the operation shaft 2 is continuously rotated, the first slider piece 4a and the second and third slider pieces 4a are
The same number of click feelings as the number of times of conduction with b and 4c are transmitted to the operation shaft 2 via the code plate 3.

Next, a method of manufacturing the click plate 3 will be described mainly with reference to FIGS. 10 and 11. First, a metal flat plate made of phosphor bronze or the like is subjected to press working to remove the outer shape, and
A blank material 29 shown in 0 is obtained. The blank material 29 is formed with the outer shapes of the common electrode 15a, the first comb tooth portion 15b, and the second comb tooth portion 19, and the first comb tooth portion 15b and the second comb tooth portion 19 are formed. An annular portion 30 is formed between them to connect them in the circumferential direction. Further, a frame portion 32 having a reference hole 31 is formed outside the second comb tooth portion 19,
The frame portion 32 and the second comb tooth portion 19 are connected via four connecting portions 33.

Next, after the blank material 29 is plated with silver, the blank material 29 is supplied to an injection molding die (not shown) using the reference hole 31 as a positioning reference, and a molten resin is injected into the cavity of the injection molding die. To fill. At that time, resin pressure acts on the blank material 29, but since the first and second comb tooth portions 15b and 19 are connected in the circumferential direction by the annular portion 30, these comb tooth portions 15b and 19 are formed. It does not deform.

After the molten resin is cooled and solidified, the mold is opened and the blank material 29 is taken out. As shown in FIG. 11, the substrate 14 is closely attached to the blank material 29 and is outsert-molded. Finally, the cord plate 3 is obtained by cutting the connecting portions 33 of the blank material 29 at the positions indicated by broken lines in FIG.

Next, a method of manufacturing the slider receiver 6 will be described mainly with reference to FIGS. First, as shown in FIG. 12, a deformed material 34 having a thick portion 34a and a thin portion 34b is formed by cutting or rolling a metal plate having a high elasticity such as phosphor bronze. In the case of this embodiment. The thickness dimension of the thick portion 34a is about 0.25 mm,
The thickness of the thin portion 34b is about 0.12 mm, which is half the thickness. Next, after silver-plating the profile 34, the profile 34 is pressed to remove the outer shape,
The blank material 35 shown in FIG. 13 is obtained. This blank material 3
5, the slider piece 4, the terminal 28 and the click spring 5 are provided.
The outer shape of the frame 3 is formed and the frame portion 3 having the reference hole 36 is formed.
7 are formed, and both are connected through a plurality of connecting portions 38. The slider piece 4 is cut out to the thin portion 34b, and the click spring 5 and the terminal 28 are cut to the thick portion 34a.

Thereafter, the blank material 35 is supplied to an injection molding die (not shown) with each reference hole 36 as a positioning reference, and the cavity of the injection molding die is filled with molten resin. After the molten resin is cooled and solidified, the mold is opened and the blank material 35 is taken out, and as shown in FIG. 14, the slider receiver 6 is closely attached to the blank material 35 and outsert molding is performed. Finally, the slider piece 4 and the click spring 5 are bent at their respective bases, the terminals 28 are bent at a right angle, and the connecting portions 38 are cut at the broken line positions in FIG. The slider receiving body 6 including the 4 and the thick click spring 5 and the terminal 28 is obtained. In this state after cutting, the slider piece 4 and the click spring 5 are electrically open, and each slider piece 4 is connected inside the corresponding terminal 28 and slider receiver 6. Has been done.

In the above embodiment, as the code plate 3 that contacts the slider piece 4 and the click spring 5, the movable contact 15 and the sliding plate 16 made of the same metal plate are outserted to the substrate 14. The case where the click spring 5 is used is described above. It is also possible to make sliding contact with the surface of the resin substrate. Further, when such a code plate is used, the movable contact point and the click concavo-convex portion are electrically isolated from each other on the code plate side, so that the slider piece 4 and the click spring 5 are received by the slider receiver. It may be connected inside the body 6.

Further, in the above embodiment, the rotary switch is mentioned as an example of the electric component with a click feeling to which the present invention is applied, but it is also applied to other electric components such as a slide switch, a rotary or a slide type variable resistor. It is possible.

[0026]

As described above, according to the present invention,
Since the slider piece and the click spring with different contact pressures can be simultaneously outserted from the same metal flat plate, the positional accuracy between the slider piece and the click spring can be improved, and the electric feeling with a click feeling with excellent assembly workability can be achieved. Parts can be provided. Further, when terminals continuous with the slider pieces are formed on the metal flat plate, it is possible to simultaneously outsert terminals that are difficult to deform.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a rotary switch according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a rotary switch.

FIG. 3 is a side view of an operation shaft.

FIG. 4 is a front view of an operation shaft.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a front view of a cord plate.

FIG. 7 is a rear view of the code plate.

8 is a cross-sectional view taken along the line BB of FIG.

FIG. 9 is a front view of a slider receiver.

FIG. 10 is a front view of a blank for forming a cord plate.

FIG. 11 is a front view of the blank material after outsert molding.

FIG. 12 is a cross-sectional view of a profiled material.

FIG. 13 is a front view of a blank material obtained from a profiled material.

FIG. 14 is a front view of the blank material after outsert molding.

[Explanation of symbols]

 1 Bearing Body 2 Operation Axis 3 Code Plate 4 Slider Piece 5 Click Spring 5a Convex Part 6 Slider Receiver (Base) 26 First Escape Hole 27 Second Escape Hole 28 Terminal 34 Profile 34a Thick Wall Part 34b Thin part 35 Blank material 36 Reference hole 37 Frame part 38 Connection part

Claims (2)

[Claims] 1. A step of forming a profiled material having a thin portion and a thick portion from a metal flat plate, the outer shape of a slider piece is punched out from the thin portion, and the outer shape of a click spring is formed in the thick portion. A click feeling characterized by including a step of forming a blank material by punching, a step of outserting this blank material on a base made of synthetic resin, and a step of cutting unnecessary portions of the blank material. For manufacturing a slider receiver for an electric component with a cover. 2. The electric component with a click feeling according to claim 1, wherein the blank material has a terminal continuous with the slider piece, and the terminal is press-pressed into the thick portion. Manufacturing method of slider receiver.