JP3576037B2 - Rotating electrical parts - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to the structure of a rotating part of a rotary electric component such as a variable resistor or a switch, and more particularly to a click mechanism generated during a rotating operation.
[0002]
[Prior art]
As a click mechanism of a conventional rotary electric component, for example, a variable resistor, there is Japanese Utility Model Publication No. 4-38486. FIGS. 7 and 8 show the click mechanism of this conventional variable resistor. FIG. 7 is a sectional view showing a click mechanism of the variable resistor, and FIG. 8 is a plan view showing a relative relationship between a click plate and a leaf spring.
In the figure, a rotating shaft 11 is formed by cutting a metal material such as aluminum into a substantially columnar shape. An operating portion 11a is provided at the tip of the rotating shaft 11, and a rotating plate described later is provided at the other end. An attachment portion 11b cut into an oval shape to be fitted is formed.
[0003]
The rotating plate 12 is formed of a molding material such as a synthetic resin into a substantially circular shape, and has an oval hole 12a in the center thereof into which an oval mounting portion 11b of the rotating shaft 11 is fitted. A plurality of first click grooves 12b are formed on one side of the rotary plate 12 on the same circumference from the center of the oval hole 12a. A second click groove 12c is formed on the inner side in the radial direction. The surface on which the second click groove 12c is formed is formed one step higher than the surface on which the first click groove 12b is formed. As a result, the two click mechanisms do not interfere with each other even if the relative positional relationship between the leaf spring and the rotary plate 12 described later slightly shifts during assembly.
[0004]
The bearing 13 is formed by integrally forming a substantially cylindrical shape by zinc die casting or the like. The bearing 13 includes a cylindrical shaft portion 13a having a through hole that penetrates and holds the rotary shaft 11, and a storage portion 13b that rotatably stores the rotary plate 12 therein.
[0005]
The leaf spring 14 is formed of a metal plate having a spring property, and has a hole 14a in the center through which the rotating shaft 11 and the rotating plate 12 are inserted. An arc-shaped cut groove 14b is provided in an outer peripheral portion above the hole 14a, and a first arm portion 14c is formed by cutting and raising between the cut groove 14b and the hole 14a. A circular arc-shaped cut groove 14d is provided in the outer peripheral portion of the hole 14a facing the first arm portion 14c, and a second arm portion 14e is provided between the cut groove 14d and the hole 14a. Are cut and raised. The first arm portion 14c and the second arm portion 14e are provided with projections 14f and 14g at the center thereof, and the first arm portion 14c is formed from the center of the oval hole 12a of the rotating plate 12. The distance of the protrusion 14c to the protrusion 14f is set longer than the distance of the second arm 14e to the protrusion 14g, so that the first arm 14c is longer than the second arm 14e. Is formed.
[0006]
A slide receiver 15 made of a molding material such as a synthetic resin and rotating with the rotary plate 12 is provided at a stage subsequent to the rotary plate 12. Further, a slider 17 slidably in contact with a resistor (not shown) formed on the resistance substrate 16 is fixed to the slider receiver 15.
[0007]
Next, the operation of the variable resistor will be described. First, when the operation portion 11a is rotated, the protrusion 14f of the first arm portion 14c of the leaf spring 14 and the first click groove 12b of the rotating plate 12 rotate while repeating engagement and disengagement. While the same click feeling is obtained during a certain rotation, the protrusion 14g of the second arm portion 14e of the leaf spring 14 is fitted into the second click groove 12c of the rotary plate 12. In this case, a larger click feeling can be obtained, and it can be sensed that the slider 17 of the variable resistor is located at a predetermined position.
[0008]
[Problems to be solved by the invention]
However, in the above-described conventional click mechanism of the variable resistor, although the projection 14f of the first arm portion 14c of the leaf spring 14 is engaged with and disengaged from the first click groove 12b of the rotary plate 12, the same is applied. The arms 14c near both sides of the protrusion 14f are located above the second click grooves 12c of the rotating plate 12 during the rotation, so that the rotating plate 12 is also thinned in response to the reduction in thickness of the product. As a result, the spring use height of the leaf spring 14 is also reduced, and the second click groove 12c is formed at a position higher than the first click groove 12b. However, there is a problem in that the abutment comes into contact with the edge portion of the outer edge of the second click groove 12c, causing an unnecessary click feeling.
[0009]
The distance between the center of the oval hole 12a of the rotary plate 12 and the protrusion 14f of the first arm 14c is equal to the distance between the center of the oval hole 12a of the rotary plate 12 and the protrusion 14g of the second arm 14e. Since the first arm 14c is longer than the second arm 14e, the first arm 14c is longer than the second arm 14e. Since the load on the arm portion 14c is reduced, it is difficult to distribute the click portion evenly when a predetermined click feeling is given, and the second click groove 12c to which a heavy load is applied is more easily scraped off. Had a problem.
Further, there is also a problem that the load applied to the leaf spring 14 and the load applied to the rotary plate 12 are different, so that the rotary shaft 11 is tilted.
[0010]
Therefore, the present invention solves the above-described problem, and causes unnecessary click feeling due to contact between the arm portion of the leaf spring constituting the click mechanism and the edge portion of the outer edge of the click groove when the rotation shaft is rotated. Rotating electricity such as a variable resistor, which prevents the occurrence of vibrations, makes the load balance of the leaf spring applied to the rotating plate uniform, and makes the product smaller and thinner without being affected by the load of the leaf spring. It is an object to provide a click mechanism for parts.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, as a first means, a housing, a rotating shaft rotatably supported by the housing, a rotating plate integrally rotated with the rotating shaft, A click spring engaged with one of the housings and having a plurality of protrusions; and a plurality of clicks formed on the other of the rotating plate and the housing and selectively disengaged from the protrusions. A groove, wherein the protrusion comprises a first protrusion having the same diameter from the axis of the rotation shaft, and a second protrusion having a smaller diameter than the first protrusion. The click groove includes a first click groove corresponding to the first protrusion, and a second click groove formed to have a smaller diameter than the first click groove, and a surface on which the second click groove is formed is formed. , Of the first click groove Characterized in that it is formed in a lower position Narumen.
[0012]
Further, as a second means, the click spring has first and second arm portions facing each other in a substantially arc shape, and a second arm portion formed with a small diameter and located inside is provided with the second arm portion. The first arm portion, which is disposed above the click groove and is formed with a large diameter and located outside, is disposed above the first click groove and the second click groove. It is characterized by having.
[0013]
As a third means, the click spring is characterized in that the width of the first arm is formed to be larger than the width of the second arm.
[0014]
As a fourth means, the click spring is provided with a pair of mounting legs which are locked to the rotating plate or the housing at a base where the first and second arms intersect. The protrusion provided on the second arm portion is formed at a target position with respect to a center line connecting the pair of mounting legs.
[0015]
Further, as a fifth means, the pair of mounting legs are press-fitted and held in the rotating plate.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 to FIG. 6 show one embodiment of the present invention. FIG. 1 is a sectional view showing a variable resistor which is a rotary electric component of the present invention, FIG. 2 is a plan view showing a relative relationship between a housing and a click spring of the rotary electric component of the present invention, and FIG. 4 is a sectional view taken along line 4-4 in FIG. 3, FIG. 5 is a front view of the click spring, and FIG. 6 is a side view of the click spring.
[0017]
In the figure, a housing 1 is made of a molding material such as a synthetic resin and has a substantially rectangular shape. The housing 1 is provided with a bearing portion 1b formed so as to protrude into a cylindrical shape from a rectangular main body portion 1a. The bearing portion 1b has a through hole 1c through which a rotating shaft described later is rotatably inserted. Is provided. A circular opening 1d is formed on the opposite side of the bearing portion 1b of the main body 1a, and a plurality of circular openings 1d are formed on the inner bottom surface of the opening 1d along the outer periphery of the through hole 1c. A first click groove 1e and a second click groove 1f each having a concave portion are formed so as to be connected in a circular shape. The second click groove 1f is provided with a small diameter so as to be located on the inner peripheral side of the first clock groove 1e, and the second click groove 1f is formed with respect to the surface on which the first click groove 1e is formed. The step is provided with a step so that the formation surface of the click groove 1f is lowered. A plurality of fitting grooves 1g into which mounting pieces (not shown) of a frame described later are fitted are provided on a side surface of the housing 1, and an upper surface of the opening 1d is provided on the upper surface of the opening 1d. A pair of mounting bosses 1h are formed.
[0018]
The rotating shaft 2 is formed in a substantially cylindrical shape from a molding material such as a synthetic resin, and an operation shaft 2 a formed of a thin shaft is provided at a tip end thereof, which is inserted into the through hole 1 c of the housing 1. On the other end side, a disk-shaped rotary plate 2b is provided. A pair of square holes 2c is formed on the protruding side of the operation shaft 2a of the rotary plate 2b, and a mounting leg of a click spring described later is inserted into the square hole 2c, and the click spring is press-fitted and locked. Has become. A plurality of projections (not shown) are provided on the rotating plate 2 on the side opposite to the side on which the operation shaft 2a projects, and the projections are made of a slider made of a conductive material such as a metal plate. 3 is fixed. A small-diameter cylindrical protrusion 2d is formed at the center of the surface on which the protrusion for fixing the slider 3 is formed. The cylindrical protrusion 2d is provided on a resistance substrate and a frame described later. It is rotatably engaged with the fitting hole.
[0019]
The click spring 4 is made of a springy metal plate and is formed in a substantially ring shape. The click spring 4 includes a first arm 4a provided in an arc shape and a second arm 4b provided opposite the first arm 4a. The arm portion 4b is formed to have a smaller diameter than the first arm portion 4a. Further, the width of the first arm portion 4a of the click spring 4 is formed to be larger than the width of the second arm portion 4b. A base 4c of the click spring 4 where the first and second arms 4a and 4b intersect is provided with a pair of mounting legs 4d which are inserted into the square holes 2c of the rotary plate 2 and locked. The first arm portion 4a and the second arm portion 4b are formed in a V-shape with a base 4c provided with the mounting leg 4d as a boundary, so that a spring property is obtained. I have. At the center of the first and second arms 4a, 4b, first and second projections 4e, 4f are provided, respectively, which project in the opposite direction to the direction in which the mounting leg 4d projects. The first and second projections 4e, 4f are formed at target positions at the same distance from a center line connecting the pair of mounting legs 4d, 4d. .
[0020]
The resistance substrate 5 is made of an insulating substrate such as a phenol resin, and has on one surface thereof an arc-shaped resistor (not shown) formed by printing carbon ink or the like. A terminal 6 is fixed to an end of the resistor by eyelets or the like. Although the present embodiment has been described with reference to the resistor board 5 provided with the resistor as described above, the present invention is not limited to this, and may be a switch board provided with fixed contacts and the like. Of course.
[0021]
The frame 7 is for holding the resistance substrate 5 and the rotary plate 2b and the like inside the housing 1, and is formed from a metal material such as a steel plate by a method such as press working. At the center of the frame 7, there is provided a fitting hole 7a through which the cylindrical protrusion 2d of the rotary shaft 2 engages and which is penetrated together with the resistance substrate 5. The fitting hole 7a is provided at an outer end of the fitting hole 7a. Is provided with a pair of mounting holes (not shown), and a pair of mounting bosses 1h of the housing 1 are fitted into the mounting holes and mounted on the housing 1. A mounting piece (not shown) for mounting in the fitting groove 1g of the housing 1 is formed on a side surface of the frame 7.
[0022]
Next, when assembling the above-described variable resistor which is a rotary electric component of the present invention, first, the slide (not shown) provided on the lower surface side of the rotary plate 2b of the rotary shaft 2 is provided with the slide. The moving element 3 is fixed by heat caulking or the like. Next, the mounting leg 4d of the click spring 4 is inserted into a pair of square holes 2c formed on the rotating plate 2b on the side of the operation shaft 2a protruding, and is press-fitted and locked.
[0023]
Next, a first click groove having a plurality of recesses formed in the inner bottom surface of the opening 1 d of the housing 1 by inserting the operation shaft 2 a of the rotation shaft 2 into the through hole 1 c of the housing 1. 1e and a cylindrical projection at the rear end of the rotating plate 2b in a state where the first projection 4e and the second projection 4f of the click spring 4 are engaged with each other in the second click groove 1f. 2d is inserted into the resistance board 5 and the fitting hole 7a at the center of the frame 7, and the housing 1 and the frame 7 are overlapped.
Next, a mounting piece (not shown) of the frame 7 is engaged with the engaging groove 1g of the housing 1, and a mounting boss 1h is fitted into a mounting hole (not shown), and caulking is performed. Then, the assembly of the electric parts is completed.
[0024]
In the above-described configuration of the rotary electric component of the present invention, the first click groove 1e and the second click groove 1f having a plurality of concave portions provided on the inner bottom surface of the opening 1d of the housing 1 are provided. The second click groove 1f is provided with a small diameter so as to be located on the inner peripheral side of the first clock groove 1e, and the second click groove 1f is formed with respect to the surface on which the first click groove 1e is formed. Is formed with a step so that the surface on which the click groove 1f is formed is lowered, so that the first arms 4a near both sides of the first projection 4e of the click spring 4 In this case, even if the slider slides above the second click groove 1f, the first arm portion 4a comes into contact with the edge of the outer edge of the second click groove 1f, causing an unnecessary click feeling. That they will It can be stopped.
[0025]
The click spring 4 includes a first arm portion 4a provided in an arc shape and a second arm portion 4b provided opposite to the first arm portion 4a. The second arm portion 4b is formed to have a smaller diameter than the first arm portion 4a, but the width of the first arm portion 4a of the click spring 4 is equal to the width of the second arm portion 4b. Since it is formed to be wider on the inside so as to be wider, the load of the spring pressure of the first arm 4a can be set substantially equal to the load of the spring pressure of the second arm 4b. Therefore, a predetermined click feeling can be equally divided without increasing the outer shape of the click spring 4, and the click feeling is stabilized and the life is improved.
[0026]
Also, a center line connecting the pair of mounting legs 4d, 4d is provided with first and second projections 4e, 4f provided at the center of the first and second arm portions 4a, 4b, respectively. , The first and second arm portions 4a and 4b have uniform loads, and a tilting load is applied to the click spring 4. Since the load applied to the rotating plate 2b becomes uniform, the rotating shaft 2 does not tilt.
[0027]
In the embodiment of the present invention described above, the click spring 4 is press-fitted and locked to the rotating plate 2b, and the first and second click grooves 1e are formed in the inner bottom surface of the opening 1d of the housing 1. 1f, on the contrary, the click spring 4 is press-fitted and locked to the inner bottom surface of the opening 1d of the housing 1, and the first and second click grooves 1e are formed in the rotating plate 2b. , 1f may be formed.
In this case, the same effects as those of the above-described embodiment of the present invention can be obtained.
In the embodiment of the present invention, the click spring 4 is press-fitted and locked to the rotary plate 2b. However, the click spring 4 may be loosely fitted with play. , Even if there is some variation in the relative dimensional relationship between the second protrusions 4e, 4f and the first and second click grooves 1e, 1f, the click spring 4 will not Since the first and second click grooves 1e and 1f move to the positions of the second click grooves 1e and 1f, the first and second protrusions 4e and 4f and the first and second click grooves 1e and 1f are simultaneously engaged in two places. Thus, a stable engagement state can be obtained.
[0028]
【The invention's effect】
As described above, in the rotary electric component of the present invention, the protrusion of the click spring has the first protrusion on the same diameter from the axis of the rotation shaft and the first protrusion having a smaller diameter than the first protrusion. A click groove of the housing formed from the second protrusion, a first click groove corresponding to the first protrusion, and a second click groove formed to be smaller in diameter than the first click groove. And the formation surface of the second click groove is formed at a position lower than the formation surface of the first click groove. Therefore, the arm portions near both sides of the first protrusion of the click spring are Even if the arm slides above the second click groove during the rotation, the arm portion comes into contact with the edge of the outer edge of the second click groove, causing an unnecessary click feeling. Can be prevented.
[0029]
Further, the click spring has first and second arm portions facing each other in a substantially arc shape, and a second arm portion formed with a small diameter and located inside is located above the second click groove. The first arm portion, which is arranged and formed with a large diameter and located on the outside, is disposed above the first click groove and the second click groove. Since the load of the spring pressure of the first arm portion can be set substantially equal to the load of the spring pressure of the second arm portion without increasing the outer shape of the click spring, the reliability of the product is improved. In addition, the product can be reduced in size and thickness.
[0030]
Further, since the click spring is formed so that the width of the first arm portion is larger than the width of the second arm portion, the click spring can reduce the load of the spring pressure of the first arm portion. Since the load can be set substantially equal to the load of the spring pressure of the second arm portion, the predetermined click feeling can be divided evenly, the click feeling is stabilized, and the life is improved.
[0031]
Further, the click spring is provided with a pair of mounting legs which are locked to the rotating plate or the housing at a base where the first and second arms intersect, and provided at the first and second arms. Since the provided protrusion is formed at a target position with respect to a center line connecting the pair of mounting legs, the loads of the first and second arms become uniform, and Since the load applied to the click spring is not applied and the load applied to the rotating plate becomes uniform, the rotating shaft is not inclined.
[0032]
Further, since the pair of mounting legs are press-fitted and held in the rotating plate, assembly is facilitated and workability is improved.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a variable resistor that is a rotary electric component of the present invention.
FIG. 2 is a plan view showing a relative relationship between a housing and a click spring of the rotary electric component of the present invention.
FIG. 3 is a plan view showing the same housing of the present invention.
FIG. 4 is a sectional view of the present invention taken along line 4-4 in FIG. 3;
FIG. 5 is a front view showing the click spring of the present invention.
FIG. 6 is a side view of the click spring of the present invention.
FIG. 7 is a sectional view showing a click mechanism of a conventional variable resistor.
FIG. 8 is a plan view showing a relative relationship between a conventional click plate and a leaf spring.
[Explanation of symbols]
Reference Signs List 1 housing 1a main body 1b bearing 1c through hole 1d opening 1e first click groove 1f second click groove 1g fitting groove 1h mounting boss 2 rotating shaft 2a operating shaft 2b rotating plate 2c square hole 2d cylindrical protrusion 3 Slider 4 Click spring 4a First arm 4b Second arm 4c Base 4d Mounting leg 4e First protrusion 4f Second protrusion 5 Resistance board 6 Terminal 7 Frame

Claims (5)

A housing, a rotating shaft rotatably supported by the housing, a rotating plate integrally rotated with the rotating shaft, and a plurality of protrusions engaged with one of the rotating plate and the housing. A click spring, and a plurality of click grooves formed on one of the rotating plate and the housing and selectively engaged with and disengaged from the protrusion. And a second protrusion having a smaller diameter than the first protrusion, and the click groove has a first protrusion corresponding to the first protrusion. A click groove and a second click groove formed to have a smaller diameter than the first click groove, and a surface on which the second click groove is formed is formed at a position lower than a surface on which the first click groove is formed. Times characterized by Type electrical components. The click spring has first and second arm portions facing each other in a substantially circular arc shape, and a second arm portion formed with a small diameter and located inside is disposed above the second click groove. The first arm portion formed with a large diameter and located on the outer side is disposed above the first click groove and the second click groove. Item 4. A rotary electric component according to Item 1. The rotary electric component according to claim 1, wherein the click spring is formed such that a width of the first arm portion is larger than a width of the second arm portion. . The click spring is provided at a base where the first and second arms intersect with each other, with a pair of mounting legs fixed to the rotating plate or the housing, and provided at the first and second arms. 4. The rotary electric component according to claim 1, wherein the projection is formed at a target position with respect to a center line connecting the pair of mounting legs. The rotary electric component according to claim 4, wherein the pair of mounting legs are press-fitted and held in the rotary plate.

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