JP2006012701A - Rotary electric component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric component capable of improving the yield of a material for forming a slider, and hardly deformed in handling it during assembly or the like. <P>SOLUTION: This rotary electric component is provided with: a code plate 2 where first and second code patterns 4A and 4B made by alternately forming conductive parts and non-conductive parts electrically connected to each other are arranged by being shifted in the circumferential direction on the same circumference; and a rotating body 6 rotatably arranged on the code plate 2 by being faced to it, and provided with a plurality of sliders 7 sliding on the first and second code patterns 4A and 4B. The rotary electric component is so structured that, on the code plate 2, a common pattern 3 is formed on a concentric circle different from the circumference with the first and second code patterns 4A and 4B formed thereon; the plurality of sliders 7 are respectively brought into sliding contact with the first and second code patterns 4A and 4B and the common pattern 3 so as to straddle them; and the plurality of sliders 7 are attached to the rotating body 6 in a state electrically insulated from one another. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotary electric component such as an encoder that outputs a pulse code of each phase when rotating to detect a rotation angle, a rotation direction, and the like.

  As a structure of a conventional rotary electric component, a code A-phase pattern, a B-phase pattern, and a common pattern are formed in the circumferential direction of the code plate, and a rotary body provided rotatably on these patterns. A structure is known in which a plurality of sliders engaged with each other slide to output A-phase and B-phase pulse codes, and a rotation angle and a rotation direction are detected by the pulse codes. (For example, refer to Patent Document 1).

Hereinafter, the structure of a conventional rotating electrical component will be described with reference to the drawings.
9 is a cross-sectional view showing a conventional rotating electrical component, FIG. 10 is an explanatory diagram showing a pattern configuration of the conventional rotating electrical component, and FIG. 11 is an explanatory diagram showing a slider piece of the conventional rotating electrical component. is there.

  In the figure, the rotary pulse switch includes an operating shaft 57 that is pivotally supported by a bearing 58, a slider receiver 56 that is a slider piece holding member that is inserted into and fixed to the operating shaft 57, and the slider. A slider piece 54 fixed to the receiver 56, patterns 51 and 52 that are arranged to face the slider piece 54 and are formed of a metal material, and a pattern holding member that holds the patterns 51 and 52. The case 55 has a rivet (not shown) inserted into a through hole provided in the periphery of the bearing 58 and the case 55 so as to be integrated. Reference numeral 59 denotes a click leaf spring.

  As shown in FIG. 10, the patterns 51 and 52 are A-phase and B-phase switch patterns 51A and 51B, and A-phase and B-phase switch patterns 51A and 51B in which comb-like conductive patterns are arranged in an arc shape. The switch pattern 51 includes a switch pattern 51A for the A phase and a switch pattern 51B for the B phase. 63 is a terminal connected to the switch pattern 51A, 64 is a terminal connected to the B-phase switch pattern 51B, and 65 is a terminal connected to the common electrode pattern 52.

  As shown in FIG. 10, the dimensional relationship between the A-phase switch pattern 51A, the B-phase switch pattern 51B, and the common electrode pattern 52 is such that the first on position and the last of the comb-shaped electrodes of the switch pattern 51 in each phase. The ON position angle of the phase is 108 degrees, the interval (off width) between adjacent comb-tooth electrodes 51a and 51b in the phase is 12 degrees, the range of the common electrode pattern 52 is 125 degrees, and the switch pattern 51A for the A phase and the common electrode The gap 60 between the pattern 52 is 6 degrees, the gap 61 between the A-phase switch pattern 51A and the B-phase switch pattern 51B is 6 degrees, and the gap 62 between the B-phase switch pattern 51B and the common electrode pattern 52 is 7 degrees. It is set to degrees.

  The slider piece 54 is formed of a metal material, and as shown in FIG. 11, contact points 53a, 53b, and 53c that contact the patterns 51A, 51B, and 52 are provided at three positions every 120 degrees in the radial direction. Yes.

  Next, the operation will be described. First, when there is a contact point (for example, 53a) at the position A (first ON position) in FIG. 10 and the operation shaft 57 is rotated counterclockwise, From the position to the position B (the last on position), a rectangular wave of 12 degrees is output both on and off. Since the contact points 53b next to the contact points 53a are arranged at intervals of 120 degrees, when they are further rotated by 12 degrees from the position B, they come to the position A in the A-phase switch pattern 51A and are turned on. Therefore, the contact points 53a and 53b with respect to the A-phase switch pattern 51A are also turned off every 12 degrees.

  Also, in the B-phase switch pattern 51B, a rectangular wave of 12 degrees is output as in the A-phase switch pattern 51A, and the A phase and the B phase have a phase difference of 6 degrees. This phase difference is because the gap 61 between the A-phase switch pattern 51A and the B-phase switch pattern 51B is set to 6 degrees.

Japanese Patent No. 3038286

  However, in the conventional rotating electrical component described above, the three slider pieces that are in sliding contact with each switch pattern and the common electrode pattern must be connected and connected to each other. In an encoder composed of a hollow shaft having a large circumferential diameter for each switch pattern and common electrode pattern, the material for forming the slider piece must be large, and the yield of the material is poor, resulting in high costs. There was a problem. In addition, there is a problem that the outer shape becomes large and deformation during handling such as assembly is likely to occur.

  Accordingly, an object of the present invention is to solve the above-described problems, to improve the yield of the material forming the slider, and to provide a rotating electrical component that is less deformed during handling such as assembly.

  In order to solve the above-described problem, the present invention provides a first solution means that the first and second code patterns in which conductive portions and non-conductive portions that are electrically connected to each other are alternately provided are arranged on the same circumference. Rotating body provided with a plurality of sliders that are arranged to be displaced in the direction, and are arranged rotatably on the code plate so as to slidably contact the first and second code patterns. And a common pattern is formed on the code plate on a concentric circle different from the circumference on which the first and second code patterns are provided, and a plurality of the sliders are respectively connected to the first and second code patterns. A plurality of the sliders are attached to the rotating body in a state of being electrically insulated from each other while being in sliding contact with the second code pattern and the common pattern.

As a second solution, the plurality of sliders are formed in the same shape.
As a third solution, the common pattern is formed on the inner side of the code plate where the code pattern is disposed.
As a fourth solving means, three sliders are provided at intervals of 120 degrees in the circumferential direction of the rotating body.

Further, as a fifth solution means, the apparatus includes a housing that rotatably accommodates the rotating body, and a mounting plate that is attached to an upper surface of the housing, and the code plate is provided independently of the housing, and the housing It was set as the structure accommodated in.
As a sixth solution, a guide piece inserted into the housing is formed on the mounting plate, and the code plate is positioned on the housing by the guide piece.

  As described above, in the rotating electrical component of the present invention, the first and second code patterns formed by alternately providing conductive portions and non-conductive portions are shifted in the circumferential direction on the same circumference. A code plate, and a rotating body provided rotatably on the code plate so as to face the code plate and provided with a plurality of sliders that are in sliding contact with the first and second code patterns. A common pattern is formed on the plate on a concentric circle different from the circumference on which the first and second code patterns are provided, and the plurality of sliders have first and second code patterns and a common pattern, respectively. Since the plurality of sliders are attached to the rotating body in a state of being electrically insulated from each other, the plurality of sliders are respectively divided into a code pattern and a common pattern. Because they are in sliding contact with each other Since Doko is no need to connected electrically, the size can be reduced formation, thereby improving the material yield, it is possible to prevent occurrence of deformation.

Further, since the plurality of sliders are formed in the same shape, the respective sliders can be made common, so that management of the parts is facilitated and erroneous assembly can be prevented.
Further, since the common pattern is formed inside the code pattern of the code plate, it is easy to route each pattern to the code plate, and the cost can be reduced.
In addition, since three sliders are provided at intervals of 120 degrees in the circumferential direction of the rotating body, a pulse code that is a multiple of 3 can be obtained with one rotation of the rotating body. Is possible.

In addition, the housing includes a housing that rotatably accommodates the rotating body, and a mounting plate that is attached to the upper surface of the housing. The code plate is provided independently of the housing, and is accommodated in the housing. It can handle various code patterns.
In addition, since the guide plate to be inserted into the housing is formed on the mounting plate, and the code plate is positioned in the housing by the guide piece, the mounting plate is simply inserted and attached to the housing in which the code plate is accommodated. Thus, since the code plate is positioned in the housing, assembly is facilitated.

  Embodiments of the rotating electrical component of the present invention are shown in FIGS. 1 is an exploded perspective view of a rotating electrical component of the present invention, FIG. 2 is a plan view of the rotating electrical component, FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2, and FIG. FIG. 5 is a plan view showing a code pattern and a common pattern before insert molding, FIG. 6 is a plan view of a code plate in which each pattern is insert-molded, and FIG. 7 shows a state in which a slider is superimposed on FIG. FIG. 8 is a plan view showing a state in which the slider is overlaid on FIG.

  1 to 3, the housing 1 is made of an insulating material such as a synthetic resin, and has a substantially circular base portion 1a and a cylindrical shaft 1b protruding from the center of the base portion 1a. The base portion 1a is formed in an annular box shape having an open front surface (upper surface in FIG. 3), and has a concave storage portion 1c inside. In addition, a pair of engaging recesses 1d and 1e that engage with protrusions 2b and 2c of a code plate 2 described later are provided at the upper and lower positions in FIG. 1 of the inner wall portion facing the cylindrical shaft 1b in the storage portion 1c. In addition, a terminal hole 1f for leading the connection terminal 5 of the code plate 2 to the bottom surface side of the housing 1 is provided on one end side of the inner bottom surface of the engaging recess 1e.

  A plurality of leg portions 1g projecting outward and a plurality of concave groove portions 1h are provided on the outer side of the base portion 1a, and a locking piece of a mounting plate 8 to be described later is provided in the concave groove portion 1h. The mounting plate 8 is attached to the housing 1 by engaging the 8b. The cylindrical shaft 1b is formed in a hollow shape and has a large through hole 1i in the center. A plurality of guide grooves 1j are provided on the inner wall of the through hole 1i in the vertical direction in FIG. 3, and an operation knob such as an electronic device (not shown) is attached to the guide groove 1j so as to be movable up and down. A push button switch mounted on a hollow printed circuit board (not shown) is operated.

  Thus, by providing a large through hole 1i in the center of the housing 1 and making the cylindrical shaft 1b hollow, it is possible to place another electrical component in the central space, so it can be mounted on a printed circuit board or the like. Therefore, a rotating electrical component having a good space factor can be obtained.

  The code plate 2 is made of an insulating material such as synthetic resin, and is formed in an annular shape having a large opening 2a at the center. As shown in FIG. 6, a pair of projecting portions 2 b and 2 c projecting outward are provided at the upper and lower positions of the code plate 2, and these projecting portions 2 b and 2 c are the housing portions 1 c of the housing 1. The pair of engaging recesses 1d and 1e provided in the inside are engaged, and the code plate 2 is housed in the housing portion 1c of the housing 1 and positioned.

In addition, the one side (front side) of the code plate 2 is embedded integrally by a method such as insert molding, and the common pattern 3 formed in an annular shape with a conductive metal plate is also conductive. A first code pattern 4A and a second code pattern 4B, which are formed in an arc shape by being shifted in the circumferential direction on the same circumference along the outer periphery of the common pattern 3 by a metal plate, are provided. Further, as shown in FIG. 5, an electrode portion 3a derived from the common pattern 3 is provided at the center of the protrusion portion 2c, and the first and second electrodes are provided on both sides of the electrode portion 3a. Are provided with a pair of electrode portions 4a and 4a that are led out from one end portions of the code patterns 4A and 4B, respectively.
The metal plate constituting the common pattern 3 and the metal plates constituting the first and second code patterns 4A and 4B are punched from the same metal plate, thereby improving the material yield. It has become a thing.

  Thus, since the common pattern 3 is formed inside the position where the first and second code patterns 4A and 4B of the code plate 2 are disposed, The pattern of the electrode portions 3a, 4a, and 4a can be easily routed, and the code plate 2 is not increased in size and the cost can be reduced.

  Further, connection terminals 5 are provided at the tips of the electrode portions 3a, 4a, and 4a, and these connection terminals 5 are outside the terminal holes 1f provided on one end side of the inner bottom surface of the storage portion 1c. It is derived towards. These connection terminals 5 are connected to a wiring pattern on a printed circuit board of an electronic device (not shown) to output an electrical signal.

  The common pattern 3 is continuously formed in an annular shape with a conductive metal plate. Further, as shown in FIG. 5, the first and second code patterns 4A and 4B are composed of comb-like conductive patterns, and have a plurality of convex conductive portions that are electrically connected to each other at regular intervals in the circumferential direction. 4b and 4b and concave non-conductive portions 4c and 4c are alternately formed. A desired rectangular wave (code output) is obtained by sliding the slider 7 described later on the pattern formed by the alternately formed conductive portions 4b and non-conductive portions 4c. Here, the non-conductive portion 4c contains a synthetic resin forming the code plate 2, and the conductive portion 4b and the non-conductive portion 4c are flush and have no level difference.

  In this embodiment, five conductive portions 4b and 4b (number of pulses) of the first and second code patterns 4A and 4B are formed, respectively. As shown in FIGS. Since the three sliders 7 that are in sliding contact with each other on the code patterns 4A and 4B of 2 are arranged at intervals of 120 degrees, it is possible to obtain a multiple of 3 pulses, that is, 15 pulses in one rotation. It is possible. Each of the sliders 7 is formed so as to always rotate while being in sliding contact with the common pattern 3, and the sliders 7 are electrically connected to each other via the common pattern 3. ing.

  The rotating body 6 is made of an insulating material such as synthetic resin, and has an annular rotating plate 6a and a rotating shaft 6b that protrudes in a cylindrical shape at the center of the rotating plate 6a. On the lower surface side of the rotating plate 6a, the common pattern 3 of the code plate 2 and the first and second code patterns 4A and 4B are abutted with elasticity, and the common as the rotating body 6 rotates. A plurality of sliders 7 made of a conductive metal plate sliding on the pattern 3 and the first and second code patterns 4A and 4B are fixed.

  In the present embodiment, three sliders 7 are provided at intervals of 120 degrees on the same circumference on the lower surface side of the rotating plate 6a, and these sliders 7 are formed in the same shape. ing. The respective sliders 7 are fixed to the lower surface side of the rotary plate 6a in a state of being insulated from each other. Further, on the upper surface side of the rotary plate 6a, there is provided a click cam portion 6c composed of an uneven portion that is continuous in an annular shape.

  In this way, since the plurality of sliders 7 are formed in the same shape, the respective sliders 7 can be made common, so that the management of the parts is facilitated, and the slider 7 is erroneously assembled. Can be prevented. Further, since the three sliders 7 are provided at intervals of 120 degrees in the circumferential direction of the rotating body 6, a pulse code of a multiple of 3 can be obtained by one rotation of the rotating body 6. As a result, a wide variety is available.

  The rotating shaft 6b is formed in a hollow shape, and a large engagement hole 6d is provided at the center. The rotating shaft 6b is provided with a plurality of claw portions 6e projecting outward on the lower surface side of the outer portion, and guide projections projecting outward from the center along the vertical direction on the lower surface side. A portion 6f is provided.

  The rotating body 6 is configured such that the engaging hole 6d of the rotating shaft 6b is engaged with the cylindrical shaft 1b of the housing 1, and the rotating plate 6a is rotatably accommodated in the accommodating portion 1c. Yes. At this time, the slider 7 fixed to the lower surface side of the rotating plate 6a includes the common pattern 3 of the code plate 2 positioned in the storage portion 1c, the first and second code patterns 4A, It comes into contact with 4B and slides. An operation knob such as an electronic device (not shown) is engaged with the claw portion 6e and the guide protrusion 6f of the rotation shaft 6b, and the rotating body 6 is rotated according to the rotation operation of the operation knob. It has become a thing.

  The mounting plate 8 is formed by punching and bending a thin metal plate. The mounting plate 8 is provided with an annular lid portion 8a and a plurality of locking pieces 8b suspended downward from the lid portion 8a. It has a snap piece 8c and a plurality of leg pieces 8d, and a pair of guide pieces 8e provided facing each other in a different direction. The lid portion 8a is provided with a protruding fixing portion 8f for fixing a click plate 9 to be described later.

  The mounting plate 8 has an opening in the housing portion 1c by engaging a plurality of the locking pieces 8b with a plurality of the recessed groove portions 1h provided on the outer side of the housing 1 and caulking the tips thereof. It is attached to the housing 1 so as to cover the part. At this time, the pair of guide pieces 8e are engaged with the storage portion 1c in a state in which the tip portions thereof are in contact with and pressed against the upper surface sides of the projections 2b and 2c of the code plate 2. By being engaged in the recesses 1d and 1e, the code plate 2 is securely held between the inner bottom portion of the housing 1 and positioned.

  As described above, the code plate 2 is provided independently of the housing 1, and is positioned and accommodated in the housing 1 in the vertical direction (the axial direction of the rotating body 6) by the mounting plate 8. Therefore, it is possible to deal with various code patterns simply by replacing the code plate 2. Further, the guide plate 8e inserted into the housing portion 1c of the housing 1 is formed on the mounting plate 8, and the code plate 2 is pressed against the housing 1 and positioned by the guide piece 8e. Therefore, the code plate 2 is positioned in the housing 1 by only inserting and attaching the mounting plate 8 to the housing 1 in which the code plate 2 is accommodated. It can be prevented and assembly is easy.

  The pair of snap pieces 8c extend from the outer surface of the housing 1 to the bottom of the bottom surface and are snap-engaged with mounting holes of a printed circuit board (not shown) such as an electronic device. At this time, the plurality of leg pieces 8d are also attached and fixed together on the printed circuit board. Further, if necessary, the plurality of leg portions 1g of the housing 1 can be reliably fixed to the printed circuit board by screws or the like.

  The click plate 9 is formed of an elastic thin metal plate or the like in an arcuate shape, and an engagement hole 9a that engages with the fixing portion 8f of the mounting plate 8 is provided at both ends, and at the center thereof. Is provided with a cam portion 9b having a protrusion protruding downward. When the rotating body 6 is rotated, the cam portion 9b is in sliding contact with the uneven click cam portion 6c formed on the upper surface of the rotating plate 6a of the rotating body 6 to obtain a click feeling. It has become.

  In the above-described embodiment, the code pattern formed on the code plate 2 is constituted by a two-phase code pattern including the first and second code patterns 4A and 4B. However, as in the present invention, the common pattern 3 is formed on a concentric circle different from the circumference on which the code pattern is provided, the code area can be widened, and the third code is formed between the first and second code patterns 4A and 4B. By providing a pattern, plus one phase (three phases) is possible, and it is possible to handle various varieties.

  According to the above-described embodiment of the present invention, the common pattern 3 is formed on the code plate 2 on a concentric circle different from the circumference on which the first and second code patterns 4A and 4B are provided. The plurality of sliders 7 are in sliding contact with each other so as to straddle the first and second code patterns 4A and 4B and the common pattern 3, and the plurality of sliders are electrically insulated from each other. Since the plurality of sliders 7 are in sliding contact with the code patterns 4A and 4B and the common pattern 3, respectively, the slides 7 are attached to the rotating body 6 in a state where the sliding is performed. Since the child 7 does not need to be electrically connected, the size of the slider 7 can be reduced, the material yield can be improved, and deformation can be prevented.

  In the above-described embodiment, the common pattern 3 is annular. However, when the output code is two-phase as in the above-described embodiment, the common pattern 3 is not necessarily annular. That is, one slider 7 (slider positioned on the upper side in FIG. 7 and FIG. 8) that is in sliding contact with an area other than the first and second code patterns 4A and 4B is connected to the connection terminal 5. Since it does not affect the output signal, it is possible not to provide a common pattern in a portion corresponding to a region other than the first and second code patterns 4A and 4b.

It is a disassembled perspective view which shows the rotary electrical component of this invention. It is a top view which shows the rotary electric component of this invention. It is sectional drawing in the 3-3 line of FIG. 2 of this invention. It is the perspective view seen from the downward direction of the mounting plate of this invention. It is a top view which shows the cord pattern and common pattern before insert molding of this invention. It is a top view which shows the code board which insert-molded each pattern of this invention. It is a top view which shows the state which accumulated the slider on FIG. 5 of this invention. It is a top view which shows the state which accumulated the slider on FIG. 6 of this invention. It is sectional drawing which shows the conventional rotating electrical component. It is explanatory drawing which shows the pattern structure of the conventional rotary electrical component. It is explanatory drawing which shows the slider piece of the conventional rotary electrical component.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Housing 1a: Base part 1b: Cylindrical shaft 1c: Storage part 1d: Engaging recessed part 1e: Engaging recessed part 1f: Terminal hole 1g: Leg part 1h: Groove part 1i: Through hole 1j: Guide groove 2: Code plate 2a: Opening portion 2b: Protruding portion 2c: Protruding portion 3: Common pattern 3a: Electrode portion 4A: First code pattern 4B: Second code pattern 4a: Electrode portion 4b: Conductive portion 4c: Nonconductive portion 5: Connection Terminal 6: Rotating body 6a: Rotating plate 6b: Rotating shaft 6c: Click cam portion 6d: Engagement hole 6e: Claw portion 6f: Guide protrusion 7: Slider 8: Mounting plate 8a: Lid portion 8b: Locking piece 8c: Snap piece 8d: Leg piece 8e: Guide piece 8f: Adhering part 9: Click plate 9a: Engagement hole 9b: Cam part

Claims (6)

  First and second code patterns in which conductive portions and non-conductive portions that are electrically connected to each other are alternately provided are arranged in a shifted manner in the circumferential direction on the same circumference, and on the code plate And a rotating body provided with a plurality of sliders arranged so as to be able to rotate opposite to each other and in sliding contact with the first and second code patterns, and the code plate includes the first and second codes. A common pattern is formed on a concentric circle different from the circumference on which the code pattern is provided, and the plurality of sliders are slidably contacted so as to straddle the first and second code patterns and the common pattern, respectively. In addition, a plurality of the sliders are attached to the rotating body while being electrically insulated from each other.   The rotary electric component according to claim 1, wherein the plurality of sliders are formed in the same shape.   The rotary electric component according to claim 1, wherein the common pattern is formed inside the code plate on which the code pattern is disposed.   4. The rotating electrical component according to claim 1, wherein three sliders are provided at intervals of 120 degrees in the circumferential direction of the rotating body. 5.   A housing that rotatably accommodates the rotating body, and a mounting plate that is attached to an upper surface of the housing, wherein the code plate is provided independently of the housing and is accommodated in the housing. The rotating electrical component according to any one of claims 1 to 4. The rotary electric component according to claim 5, wherein a guide piece inserted into the housing is formed on the mounting plate, and the code plate is positioned on the housing by the guide piece.

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