JP2003315103A - Encoder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the yield of products, reduce the prize and size, and further surely prevent the generation of noise due to vibration or intermittence of output. <P>SOLUTION: A rotating plate 2 having a prescribed light transmitting pattern is mounted on a rotating shaft. A light emitting element 3 and a light receiving element 4 are arranged opposite each other across the rotating plate 2. A circuit board 14 with the light emitting element 3 mounted thereon is mounted on an insulating base member 5. A circuit board 7 electrically connected to the light receiving element 4 is mounted on an insulating support member 6. A conductive pin 26 is planted in the support member 6. A socket pin 27 for receiving the conductive pin 26 is planted in the base member 4. The upper end of the conductive pin 26 is soldered to the through-hole of the circuit board 7. The lower end of the pin part 27b of the socket pin 27 is soldered to the through-hole of the circuit board 14. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encoder mounted on a rotary shaft such as a motor for detecting the number of rotations and / or the rotational angle position of the rotary shaft.

[0002]

2. Description of the Related Art Conventionally, a rotary plate mounted on a rotary shaft and having a predetermined light transmission pattern, a light emitting element and a light receiving element which are arranged so as to face each other with the rotary plate interposed therebetween and which transmit and receive light through the light transmission pattern, An encoder with is provided. In this encoder, the light receiving element receives the light from the light emitting element through the light transmission pattern of the rotary plate, and detects the rotation speed and / or the rotational position of the rotary shaft based on the light receiving signal.

An encoder of this type is disclosed in Japanese Patent Laid-Open No. 9-2.
There is an encoder disclosed in Japanese Patent Publication No. 97040. This conventional encoder includes a base portion side circuit board that is attached to a base member and includes one of the light emitting element and the light receiving element in addition to the rotating plate, the light emitting element and the light receiving element, and the light emitting element. And a non-base part side circuit board which is provided with the other of the light receiving elements and is attached to the base member while being spaced from the rotary plate on the other side in the axial direction of the rotary shaft, and the base part side. A connector for electrically connecting the circuit of the circuit board and the circuit of the non-base part side circuit board is provided. The connector includes a male connector half having a male terminal attached to a male connector body and a female connector half having a female terminal fitted to the male terminal on a female connector body. It is composed of parts and parts. Further, in this conventional encoder, the base member is formed with a connector body fitting portion for holding the male connector body and the female connector body of the male connector half portion and the female connector half portion in a fitted state. Has been done.

According to the above publication, this conventional encoder has the advantage that the yield of products is significantly improved.
It is described that the advantage that vibration generation of noise and intermittent output does not occur can be obtained. The contents of the explanation are as follows.

In the conventional encoder, since the circuit of the base side circuit board and the circuit of the non-base side circuit board are connected by using the connector, the unit on the base side circuit board and the non-base side circuit board are connected. Units can be treated separately. Therefore, assembling becomes easy, and both can be inspected separately, and even if there is a defect as a result of the inspection, they can be individually replaced. Therefore, the product yield is significantly improved.

In the conventional encoder, the male connector body and the female connector body are fitted to the connector body fitting portion of the base member, and the base portion side circuit board and the non-base portion side circuit board are also the base member. Mounted directly on. Therefore, even if vibration is generated due to the rotation of the rotating plate, or if external vibration is applied, the base member,
The male connector half and the female connector half, and the base side circuit board and the non-base side circuit board do not vibrate individually, but together in a state where each member is substantially integrated. Vibrate. As a result, wear or friction does not occur at the contact portion between the male terminal and the female terminal, or both terminals do not come into contact with each other. Therefore, even if the circuit of the base-side circuit board and the circuit of the non-base-side circuit board are connected using the connector, noise or intermittent output does not occur.

[0007]

However, in the above-mentioned conventional encoder, the male connector half portion in which the male terminal is attached to the male connector body and the male terminal are fitted to the female connector body. A connector including a female connector half to which a female terminal is attached is used, and the price of the connector itself is relatively high, and thus the conventional encoder is expensive.

Further, in the above-mentioned conventional encoder, in order to prevent generation of noise and intermittent output due to vibration,
The connector body fitting portion is formed on the base member.
Therefore, the structure of the base member becomes complicated, and the conventional encoder is also expensive in this respect as well.

Further, in the conventional encoder, by fitting the male connector body and the female connector body constituting the connector to the connector body fitting portion formed on the base member, noise and output due to vibration are generated. Is trying to prevent the occurrence of intermittent. However, in such a fitted state, it is impossible to completely prevent rattling due to a minute gap between the connector body fitting portion and the male connector body or the female connector body, and noise or It cannot be said that the occurrence of intermittent output can be reliably prevented. In the publication, there is a description that the rattling is fitted without the rattling, but it is practically impossible to completely eliminate the rattling, and it is extremely high if the rattling is minimized. Precision is required, and the price will increase significantly.

Furthermore, in the conventional encoder,
Since the connector having the above-described configuration is used, the connector arranging space increases, and the size must be increased accordingly.

The present invention has been made in view of such circumstances, and it is possible to improve the yield of products, reduce the price and size of the product, and generate noise due to vibration. It is an object of the present invention to provide an encoder that can more reliably prevent the occurrence of intermittent output.

[0012]

In order to solve the above-mentioned problems, an encoder according to a first aspect of the present invention is directed to a rotary plate mounted on a rotary shaft and having a predetermined light transmission pattern, and facing the rotary plate with the rotary plate interposed therebetween. Of the light emitting element and the light receiving element that are arranged to transmit and receive light through the light transmitting pattern, an insulating base member to which one of the light emitting element and the light receiving element is attached, and the light emitting element and the light receiving element Of the insulating member which is attached to the base member and is detachably fixed to the base member, and the support which is electrically connected to the light emitting element or the light receiving element attached to the supporting member and is attached to the supporting member. A member-side circuit board, a conductive pin implanted in one of the base member and the support member, and an implantable pin in the other of the base member and the support member A socket pin that removably receives the conductive pin, and a predetermined electrical connection between the base member side and the support member side is via the conductive pin and the socket pin. It is done.

An encoder according to the second aspect of the present invention comprises:
In the first aspect, most of the conductive pins are
The socket pin is embedded in one of the base member and the support member, and most of the socket pins are embedded in the other of the base member and the support member.

An encoder according to the third aspect of the present invention comprises:
In the first or second aspect, at least one of the conductive pin and the socket pin is implanted in the base member or the support member by press fitting or insert molding.

An encoder according to the fourth aspect of the invention is
In any one of the first to third aspects, the conductive pin or the socket pin implanted in the support member is electrically connected to the support member side circuit board without a lead wire. It is a thing.

An encoder according to the fifth aspect of the present invention is
In any one of the first to fourth aspects, the light emitting element or the light receiving element attached to the base member is electrically connected to the base member side circuit board attached to the base member. is there.

An encoder according to the sixth aspect of the invention is
In the fifth aspect, the conductive pin or the socket pin implanted in the base member is electrically connected to the base member side circuit board without a lead wire.

An encoder according to the seventh aspect of the present invention is
In any one of the first to sixth aspects, the base member and the support member have a positioning structure for positioning relative positions of each other.

An encoder according to the eighth aspect of the present invention is
In the seventh aspect, the positioning structure is formed on one of the base member and the support member, which is provided with a positioning pin or a protruding portion, and on the other of the base member and the support member. And a concave portion that fits the positioning pin or the convex portion.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An encoder according to the present invention will be described below with reference to the drawings.

FIG. 1 is a partial vertical sectional view showing an encoder 1 according to an embodiment of the present invention mounted on a motor 30. FIG. 2 is a view taken along the line AA ′ in FIG. FIG. 3 is a view taken along the line BB ′ in FIG. FIG. 4 is a sectional view showing a state before the support member 6 side assembly is attached to the base member 5, and corresponds to FIG. 3. 5A is an enlarged sectional view showing only the socket pin 27 and the conductive pin 26 in FIG. 3, and FIG. 5B is an enlarged sectional view showing only the socket pin 27 and the conductive pin 26 in FIG. is there. Figure 6
[Fig. 2] is a partially cutaway view taken along the line CC 'in Fig. 1.
FIG. 7 is a view on arrow DD ′ in FIG. 1. 8 is shown in FIG.
It is an EE 'arrow line view inside. The motor 30 is not shown in FIGS. 2, 3, 4, and 6. In addition, in the following description, the upper and lower sides shall correspond to the upper and lower sides in FIG.

The encoder 1 according to this embodiment is attached to the housing 31 of the motor 30 on the upper end side of the rotary shaft 31 of the motor 30. Rotating shaft 31 of motor 30
Penetrates the housing 32 and projects upward.

The encoder 1 according to the present embodiment has a rotary plate (code plate) 2 mounted on a rotary shaft 31 of a motor 30 and having a predetermined light transmission pattern, and is arranged to face the rotary plate 2 with the rotary plate 2 interposed therebetween. LEs that send and receive light through patterns
A light emitting element 3 such as D and a light receiving element 4 such as a phototransistor, an insulating base member 5 to which the light emitting element 3 is attached, and an insulating base member to which the light receiving element 4 is attached and detachably fixed to the base member 5. The support member 6 and the light receiving element 4 attached to the support member 6 are electrically connected to each other, and the support member 6
And a circuit board 7 on the side of the supporting member 6 attached thereto.

As shown in FIG. 1, the hollow cylindrical boss 8 is fitted into the upper end of the rotary shaft 31, and the rotary plate is fixed to the boss 8 with the clasp 9 so that the rotary plate 31 is mounted on the rotary shaft 31. Has been done. Further, a permanent magnet 10 having a ring-shaped magnetic pole divided into a predetermined pattern is fixed on the clasp 9. The clasp 9 also serves as a support for the permanent magnet 10. A magnetic sensor 11 including an MR sensor or the like is mounted at a position facing the permanent magnet 10 on the circuit board 7. That is, the encoder 1 according to the present embodiment not only detects the rotation speed and / or the rotation position of the rotating shaft 31 based on the signal from the light receiving element 4, but also detects the rotating shaft 31 based on the signal from the magnetic sensor 11. Is configured to detect the rotation speed of the. However, in the present invention, it is not always necessary to provide the permanent magnet 10 and the magnetic sensor 11 to detect the rotational speed by magnetism. The screw 12 is screwed into the screw hole provided on the side portion of the boss 8 and the screw 12 is strongly pressed against the rotating shaft 31.
The fixing and positioning of (therefore, the rotary plate 2 and the permanent magnet) to the rotary shaft 7 is realized. When tightening or loosening the screws 12 used for this positioning, holes or slits (not shown) provided in the peripheral wall portion 5c of the base member 5 are used.
You can insert the driver through.

In this embodiment, as shown in FIGS. 1 and 6 to 8, the base member 5 is made of polycarbonate or other insulating material so that its schematic shape is a bottomed cylindrical shape with an upper opening. It is molded of resin or the like. A through hole 5b through which the rotary shaft 31 penetrates is formed in the bottom portion 5a of the base member 5. The base member 5 is shown in FIGS.
As shown in FIG. 7 and FIG. 7, it is fixed on the housing 32 of the motor 30 with four screws 13.

As shown in FIGS. 1, 3, 4 and 7, the base member 5 has a thick portion having a height which does not collide with the rotary plate 2 in the vicinity of the light emitting element 3 and the light receiving element 4. 5d
have. A recess 5e for arranging the base member side circuit board 14 on which the light emitting element 3 is mounted is formed on the lower surface side of the thick portion 5d. The circuit board 14 has the recess 5
It is arranged at e and is fixed to the thick portion 5d by two screws 15. Thus, in this embodiment, the light emitting element 3 is attached to the base member 5 via the circuit board 14. The thick portion 5d is formed with a receiving hole 5f that is in communication with the recess 5e and receives the light emitting element 3. Further, a hole 5g that is in communication with the receiving hole 5f and is open to the upper side.
Are formed. The holes 5f and 5g form an optical path of light emitted from the light emitting element 3 and heading for the rotary plate 2, and a lens 16 for making the light emitting element 3 substantially parallel light is provided in the middle thereof.

In the present embodiment, the support member 6 is molded from polycarbonate or other insulating resin so that its schematic shape is ring-shaped, as shown in FIGS. 1 and 2. . As shown in FIGS. 1 and 2, the support member 6 is detachably fixed to the upper surface of the peripheral wall portion 5c of the base member 5 with four screws 17. As shown in FIGS. 3 and 4, the support member 6 has a mounting portion 6a for mounting the circuit board 18 on which the light receiving element 4 is mounted, and the circuit board 18 has a screw or the like (see FIG. Fixed (not shown). Thus, in the present embodiment, the light receiving element 4 is attached to the support member 6 via the circuit board 18. The circuit board 18 and the circuit board 7 are electrically connected by a lead wire (not shown), whereby the light receiving element 4 is electrically connected to the circuit board 7. However, by mounting the light receiving element 4 on the circuit board 7, the light receiving element 4 may be directly electrically connected to the circuit board 7. In this case, the light receiving element 4 is attached to the support member 6 via the circuit board 7.

The circuit board 7 is attached to the upper surface of the support member 6 with four screws 19 so as to close the opening of the support member 6. The circuit board 7 has a circuit for supplying a drive signal to the light emitting element 3, the light receiving element 4 and the magnetic sensor 1.
A circuit for obtaining an encoder output signal indicating the rotation angle position and the number of rotations of the rotary shaft 31 based on the signal from 1 is mounted. FIG. 1 and FIG. 2 also show some of the electric components 20, 21 and 22 that form those circuits. Also,
The circuit board 7 is also equipped with a connector 25 for receiving power supply from the outside and outputting an encoder output signal to the outside via a cable 23 and a connector 24 provided at the tip thereof. It goes without saying that the connector 24 can be attached to and detached from the connector 25.

Then, in the present embodiment, FIGS.
As shown in FIG. 2, the support member 6 includes two conductive pins 26.
And the base member 5 has two conductive pins 26.
Two socket pins 27 that have respectively received are implanted. Since the support member 6 has an insulating property, the two conductive pins 26 do not electrically short-circuit or leak. Similarly, since the base member 5 has an insulating property, the two socket pins 27 do not electrically short-circuit or leak.

In the present embodiment, the conductive pin 26 is planted in the support member 6 by being press-fitted into a through hole vertically penetrating the support member 6 (a through hole having a diameter smaller than that of the conductive pin 26). It is set up. However, the conductive pin 26 may be implanted by insert molding when the support member 6 is molded, for example. As can be seen from FIGS. 3 and 4, most of the conductive pins 26 are embedded in the support member 6. In the present embodiment, the upper end portion of the conductive pin 26 has the support member 6
From above, is inserted into a through hole (not shown) formed in the circuit board 7 and soldered there.
The lower end portion of the conductive pin 26 projects downward from the support member 6 so as to enter the socket portion 27 a of the socket pin 27.

Further, in the present embodiment, the socket pin 2
7 is press-fitted into a through hole (a through hole having a smaller diameter than the socket portion 27a of the socket pin 27) 5h which is formed in the thick portion 5d of the base member 5 and which penetrates vertically. Particularly, the socket portion 27a is press-fitted into the through hole 5h. Since the pin portion 27b of the socket pin 27 has a smaller diameter than the socket portion 27a, it is not press-fitted but simply inserted into the through hole 5h. However, the socket pins 27 may be implanted by insert molding when the base member 5 is molded, for example. As can be seen from FIGS. 3 and 4, most of the socket pins 27 are embedded in the base member 5.
In the present embodiment, the socket pin 27 has a structure shown in FIGS.
As shown in, the socket portion 27a, the pin portion 27b,
And a contact piece 27c provided in the socket portion 27a for making good electrical connection with the conductive pin 26. Such a socket pin 27 is commercially available and is much cheaper than a connector. As the socket pin 27, for example, a socket pin such as a product number 01702-13-2010 manufactured by PRECI-DIP Co., Ltd. can be used. The structure of the socket pin 27 is not limited to the example shown in FIG.

The lower end portion of the pin portion 27b of the socket pin 27 projects from the thick portion 5d of the base member 5 into the recess 5e, is inserted into a through hole (not shown) formed in the circuit board 14, and is there. Is soldered to.

In this embodiment, in this way, the circuit board 14 on which the light emitting element 3 on the base member 5 side is mounted,
The circuit board 7 on the side of the supporting member 6 has two sets of conductive pins 26.
And, it is electrically connected via the socket pin 27. As a result, the light emitting element 3 is connected to the circuit board 7 via the circuit board 14, and a drive signal is given to the light emitting element 3. It should be noted that without using the circuit board 14, the socket pin 2
The lower part of the pin portion 27b of No. 7 and the light emitting element 3 may be electrically connected by a lead wire.

Contrary to the present embodiment, the support member 6
2 socket pins 27 are planted on the base member 5
A book of conductive pins 26 may be implanted. In addition, the support member 6
One conductive pin 26 and one socket pin 27 are implanted in the base member 5, and the socket pin 27 and the conductive pin 2 are mounted on the base member 5.
You may plant 6 one by one. Further, in the present embodiment, since only the drive signal is supplied to the light emitting element 3 via the conductive pin 26 and the socket pin 27, only two sets of them are provided. However, in the present invention, the number of sets of the conductive pins 26 and the socket pins 27 is not limited to this, and may be changed as needed.

Further, in this embodiment, the base member 5 and the support member 6 have a positioning structure for positioning their relative positions. Specifically, in the present embodiment, as shown in FIGS. 1 and 2, this positioning structure is provided at two locations on the upper surface of the peripheral wall portion of the base member 5 having a 180 ° positional relationship. It is composed of two positioning pins 28 and recesses 6b which are respectively formed at two corresponding positions on the lower surface of the support member 6 and which fit into the positioning pins 28. The positioning pin 28 may be, for example, a hole (positioning pin 28) previously formed in the base member 5.
It can be projected by being press-fitted into a hole having a smaller diameter. Instead of the positioning pin 28, the base member 5
A convex portion corresponding to the positioning pin 28 may be formed at the time of molding. Further, contrary to the present embodiment, the positioning pin 28 or the convex portion may be projected or formed on the support member 6, and the concave portion adapted to this may be formed on the base member 5.

The supporting member 6 is detachably fixed to the base member 5 with a screw 17. However, since the hole of the supporting member 6 through which the screw 17 is inserted is inevitably larger than the diameter of the screw 17, the above-mentioned positioning structure is used. If it does not exist, the supporting member 6 cannot be accurately positioned with respect to the base member 5, and thus the relative position of the light receiving element 4 with respect to the rotating plate 2 cannot be accurately reproduced. On the other hand, if the positioning structure is provided as in the present embodiment, the supporting member 6 can be positioned with respect to the base member 5 with high accuracy, and thus, the relative position of the light receiving element 4 with respect to the rotating plate 2. It is possible to accurately reproduce various positions.

Although not shown in the drawing, the encoder 1 is covered with a cover. The cable 23 is led out through a hole formed in this cover.

Next, an example of an assembling procedure of the encoder 1 according to this embodiment will be described.

First, as shown in FIG. 4, an assembly on the base member 5 side and an assembly on the support member 6 side are prepared.

The base member 5 side assembly is assembled, for example, as follows. First, the socket pin 27 is pressed into the base member 5. Next, the circuit board 14 on which the light emitting element 3 is mounted is fixed to the base member 5 with the screw 15. Next, the lower end portion of the pin portion 27b of the socket pin 27 is soldered to the through hole of the circuit board 14. Also, lens 1
Attach 6 to base member 5. As a result, the assembly on the base member 5 side in FIG. 4 is obtained.

The support member 6 side assembly is assembled, for example, as follows. First, the conductive pin 2 is attached to the support member 6.
Press in 6. Next, the circuit board 1 on which the light receiving element 4 is mounted
8 is previously connected to the circuit board 7 by a lead wire, and the circuit board 14 is attached to the support member 6. Next, the circuit board 7
Is fixed to the support member 6 with screws 19. Then, the upper ends of the conductive pins 26 are soldered to the through holes of the circuit board 7. As a result, the assembly on the side of the supporting member 6 in FIG. 4 is obtained.

Next, the base member 5 of the assembly on the base member 5 side is fixed to the housing 32 of the motor 30 with the screw 13.

Next, the rotary plate 2, the clasp 9 and the permanent magnet 10 are fixed to the boss 8. Then, the boss 8 is fixed to the rotating shaft 31 of the motor 30 with the screw 12. At this time, the magnetic pole position of the motor 30 and the origin position of the circuit board 7 are adjusted so as to approximately coincide with each other.

Thereafter, the conductive pin 26 is replaced by the socket pin 2
Support member 6 so as to be advanced into the socket portion 27a of No. 7 and the positioning pin 28 fits into the recess 6b.
After positioning the base member 5 with respect to the base member 5,
The support member 6 of the side assembly is fixed to the base member 5 with screws 17. At this time, the state shown in FIG. 4 changes to the state shown in FIG.

Next, the connector 24 of the cable 23 is attached to the connector 25 on the circuit board 7, and the magnetic poles are finely adjusted. The motor 30 is rotated. The rotation plate 2 is rotated by the rotation of the motor 30. The light from the light emitting element 3 is applied to the rotating plate 2, the light passing through the light transmitting region of the rotating plate 2 is received by the light receiving element 4 as an optical signal, and the light receiving element 4 converts the optical signal into an electric signal. The circuit mounted on the circuit board 7 outputs this electric signal via the cable 23 as a rotation angle position signal of the rotation shaft of the motor 30. The origin (magnetic pole) is adjusted by monitoring the rotation angle position signal and the magnetic pole position of the motor. When the origin is deviated, the motor 30 is once stopped, and then the screw 12 is loosened to adjust the position of the boss 8 and thus the rotary plate 2 in the rotation direction, and then the screw 12 is tightened. The above-mentioned monitoring is performed again, and if the origin is shifted, the above adjustment work is repeated. If the origin is not shifted,
Finish the origin adjustment. As will be understood from the above description, such adjustment is performed in a state where the support member 6 is accurately positioned with respect to the base member 5 by the positioning pin 28.

Finally, the above-mentioned elements are covered with a cover (not shown) to complete the encoder 1 according to the present embodiment.

In the encoder 1 according to the present embodiment, the conductive pin 26 and the socket pin 27 are used to connect the circuit on the base member 5 side and the circuit on the support member 6 side. The assembly on the support member 6 side can be handled separately. Therefore, assembling becomes easy, and both can be inspected separately, and even if there is a defect as a result of the inspection, they can be individually replaced.
Therefore, according to the present embodiment, the yield of products is significantly improved.

Further, in this embodiment, instead of the connector used in the above-mentioned conventional encoder,
Conductive pins 26 and socket pins 27 are used. Since the conductive pin 26 and the socket pin 27 are much cheaper than the connector, according to the present embodiment, the price can be reduced as compared with the conventional encoder.

Further, in this embodiment, the conductive pin 2 is used.
Since 6 is embedded in the insulating support member 6, the conductive pin 26 corresponds to the terminal of the male (or female) connector half, and the insulating support member 6 is the light receiving element 4 and the circuit. Board 7
Not only the original function of being a support portion (mounting base) of the connector, but also the function of a male (or female) connector half portion as a male (or female) connector body (connector housing). . Similarly, in the present embodiment, since the socket pins 27 are embedded in the insulating base member 5, the socket pins 27 correspond to the terminals of the female (or male) connector half, and the insulating pins are The base member 5
Not only the original function of serving as a mounting base for the light emitting element 3 and other members, but also the function of a female (or male) connector half portion as a female (or male) connector main body (connector housing) is simultaneously performed. It will be.

Then, in this embodiment, the support member 6 is fixed to the base member 5 with the screw 17, and the both are integrated. Therefore, the same result can be obtained as when the male connector body and the female connector body are fixed and integrated. Therefore, according to the present embodiment, since rattling or the like does not occur between the two, the influence of vibration on the connecting portion between the conductive pin 26 and the socket pin 27 is greatly reduced, and the above-described effect is achieved. It is possible to more reliably prevent generation of noise and intermittent output due to vibration, as compared with a conventional encoder.

Further, according to the present embodiment, the base member 5 does not need the connector body fitting portion required in the conventional encoder, so that the structure of the base member 5 is simple. From this point as well, it is possible to realize further cost reduction as compared with the conventional encoder.

Further, according to the present embodiment, as described above, since the supporting member 6 and the base member 5 are also used as the connector body (connector housing), the connector body portion is separately required. The size of the encoder can be further reduced as compared with the conventional encoder.

Furthermore, according to the present embodiment, since the base member 5 and the supporting member 6 have the positioning structure (the positioning pin 28 and the recessed portion 6b), the circuit board 7 is defective during use by the user. 4 occurs (most of the circuit board 7 is in trouble during use), the origin adjustment is not performed while monitoring the signals required during assembly at the time of manufacture, but simply in FIG. It is only necessary to replace the assembly on the support member 6 side of. This is because the origin adjustment while monitoring the signal at the time of manufacturing the encoder 1
Even if the support member 6 is accurately positioned with respect to the base member 5 by the positioning pin 28 and the assembly on the support member 6 side is replaced with a new one, the positioning pin 28 causes the support member 6 to move. This is because it is possible to accurately position with respect to the base member 5 at the position where the origin adjustment is performed at the time of manufacturing, and it is possible to accurately reproduce the relative position of the light receiving element 4 with respect to the rotary plate 2. . Therefore, according to this embodiment, the maintenance cost can be significantly reduced.

However, in the present invention, the positioning structure for the base member 5 and the supporting member 6 does not necessarily have to be provided. In this case, the advantage of reducing the maintenance cost cannot be obtained, but the other advantages described above can be obtained.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment.

For example, contrary to the case of the above-described embodiment, the light emitting element 3 may be attached to the support member 6 and the light receiving element 4 may be attached to the base member 5.

Further, in the above-described embodiment, the motor 30
In this example, the rotary shaft 31 of the encoder 1 is used as the rotary shaft of the encoder 1. However, a dedicated rotary shaft is provided in the encoder 30, and the dedicated rotary shaft and the rotary shaft 31 of the motor 30 are mechanically connected. Good. In that case, a bearing for supporting the dedicated rotating shaft may be attached to the base member 5.

[0058]

As described above, according to the present invention,
To provide an encoder that can improve the yield of products, can reduce the price and the size, and can more reliably prevent noise and intermittent output from occurring due to vibration. You can

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view showing an encoder mounted on a motor according to an embodiment of the present invention.

FIG. 2 is a view taken along the line A-A ′ in FIG.

FIG. 3 is a view taken along the arrow B-B ′ in FIG.

FIG. 4 is a cross-sectional view showing a state before the support member side assembly is attached to the base member.

FIG. 5 is an enlarged cross-sectional view showing only the socket pin and the conductive pin before and after mounting the support member side assembly on the base member.

6 is a partially cutaway view taken along the line CC ′ in FIG. 1. FIG.

FIG. 7 is a view taken along the arrow D-D ′ in FIG. 1.

8 is a view taken along the arrow E-E 'in FIG.

[Explanation of symbols]

1 encoder 2 rotating plate 3 light emitting element 4 Light receiving element 5 Base member 5f Recessed part that fits the positioning pin 6 Support members 7 Support member side circuit board 14 Base member side circuit board 26 Conductive pin 27 socket pins 28 Positioning pin

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2F077 AA42 CC02 NN04 NN24 PP14                       VV02 VV07 WW06                 2F103 BA10 BA43 CA02 DA01 DA13                       EA12 EB06 EB12 EB27 EB33                       EB36 EB37 GA01 GA02 GA15                       GA16

Claims (8)

[Claims] 1. A rotary plate mounted on a rotary shaft and having a predetermined light transmission pattern, a light emitting element and a light receiving element which are arranged so as to face each other with the rotary plate interposed therebetween, and which transmit and receive light through the light transmission pattern, the light emitting element. And an insulative base member to which one of the light receiving elements is attached, and an insulative support member to which the other of the light emitting element and the light receiving element is attached and detachably fixed to the base member, The light emitting element or the light receiving element attached to the support member is electrically connected to the support member side circuit board attached to the support member, and is planted in one of the base member and the support member. A conductive pin; and a socket pin that is implanted in the other of the base member and the support member and removably receives the conductive pin. Encoders predetermined electrical connection between the member side the support member side, characterized in that it is performed via the conductive pin and the socket pin. 2. Most of the conductive pins are embedded in one of the base member and the support member, and most of the socket pins are in the other of the base member and the support member. The encoder according to claim 1, wherein the encoder is embedded in the. 3. The method according to claim 1, wherein at least one of the conductive pin and the socket pin is implanted in the base member or the support member by press fitting or insert molding. The encoder according to 2. 4. The conductive pin or the socket pin implanted in the supporting member is electrically connected to the supporting member side circuit board without a lead wire. The encoder according to any one of 1 to 3. 5. The base member side circuit board, which is electrically connected to the light emitting element or the light receiving element mounted on the base member, and is mounted on the base member. The encoder according to any one of 1. 6. The conductive pin or the socket pin embedded in the base member is electrically connected to the base member side circuit board without a lead wire. Encoder described. 7. The encoder according to claim 1, wherein the base member and the support member have a positioning structure for positioning relative positions of each other. 8. The positioning structure is formed on one of the base member and the support member so as to project or form a positioning pin or a protrusion, and on the other of the base member and the support member. The encoder according to claim 7, further comprising: a locating pin or a concave portion that matches the convex portion.