Substrate fixing structure and actuator

Abstract

To provide a substrate fixing structure that can reduce the size of a device and is allowed to have a light guide function with a simple configuration, and an actuator.SOLUTION: An actuator 1 is provided with a circuit board 15 that has a light emitting device mounted thereon, a housing 7 that accommodates the circuit board 15, and a substrate holding member 41 that is provided with a substrate holding part 51 causing the housing 7 to hold the circuit board 15. The substrate holding member is provided with a light path that guides light emitted from the light emitting device, and a substrate fixing structure has a simple configuration and is allowed to have a light guide function to reduce the size of a device.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a substrate fixing structure and an actuator, and more particularly to an invention devised so that the apparatus can be miniaturized and provided with a light guide function with a simple configuration.

Background Art

[0002] When installing a circuit board on which electronic components are mounted in the housing of an actuator, the circuit board is fixed with metal screws. At this time, in order to ensure the strength of the circuit board, prevent short circuits, and take noise countermeasures, etc., the screw holes through which the screws penetrate the circuit board are arranged while securing a creepage distance from the edge or conduction pattern of the circuit board. Therefore, when the circuit board is fixed with metal screws, there are portions on the circuit board where no conduction pattern is provided and electronic components cannot be mounted. Therefore, there is a configuration in which a substrate is fixed with a plastic clip as shown in Patent Document 1.

[0003] In addition, an LED is mounted on the circuit board, and a configuration is required to guide the light of the LED to the outside to ensure visibility. According to the configuration described in Patent Document 2, a light guide is installed in the housing, and the light emitted from the light-emitting element in the housing is guided to the outside of the housing by the light guide.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the above conventional configuration has the following problems. That is, space is required to install the light guide, making it difficult to miniaturize the housing.

[0006] The present invention has been made based on such points, and an object thereof is to provide a substrate fixing structure and an actuator that can miniaturize the device and provide a light guide function with a simple configuration.

Means for Solving the Problems

[0007] To solve the above problems, the substrate fixing structure according to claim 1 of the present invention includes a circuit board on which a light emitting element is mounted, A plurality of the above A plurality of a housing that houses the circuit board, and a substrate holding member provided on the housing to hold the circuit board, and an optical path for guiding the light emitted from the light emitting element is provided on the substrate holding member. A plurality of is characterized in that A plurality of it is provided. Among the plurality of substrate holding portions, some substrate holding portions are recesses with which some circuit boards among the plurality of circuit boards are engaged, and the other substrate holding portions among the plurality of substrate holding portions are pressing portions that press and hold the other circuit boards among the plurality of circuit boards against the housing. is provided. Further, the substrate fixing structure according to claim 2 is characterized in that, in the substrate fixing structure according to claim 1, a part of the substrate holding member is exposed to the outside of the housing. Further, the substrate fixing structure according to claim 3 is, in the substrate fixing structure according to claim 1 or claim 2, The light emitting elements are mounted on each of the plurality of circuit boards. , The optical paths corresponding to the light emitting elements is provided. Further, the substrate fixing structure according to claim 4 is characterized in that, in the substrate fixing structure according to claim 3, the above A plurality of substrate holding members are installed for each optical path. is characterized in that. Further, the substrate fixing structure according to claim 5 is, in the substrate fixing structure according to claim 3 described, One provided with a plurality of the optical paths the substrate holding member is installed. Further, the substrate fixing structure according to claim 6 is, in the substrate fixing structure according to claim Any one of claims 1 to 5 described, The optical path is made of the same material as the substrate holding member. is characterized in that. Further, according to claim 7 Actuator It is the substrate fixing structure according to any one of claims 1 to 6 Equipped with which is characterized by the above.

Advantages of the Invention

[0008] As described above, according to the substrate fixing structure described in claim 1 of the present invention, a circuit board on which a light emitting element is mounted, a housing in which the circuit board is housed, and a substrate holding member provided with a substrate holding portion for holding the circuit board in the housing are provided, and an optical path for guiding the light emitted from the light emitting element is provided in the substrate holding member. Therefore, the apparatus can be miniaturized and a light guide function can be provided with a simple configuration. Further, according to the substrate fixing structure described in claim 2, in the substrate fixing structure described in claim 1, since a part of the substrate holding member is exposed outside the housing, the light of the light emitting element can be easily recognized from the outside with a simple configuration. Further, according to the substrate fixing structure described in claim 3, in the substrate fixing structure described in claim 1 or claim 2, there are a plurality of the circuit boards, and a plurality of the substrate holding portions are provided in the substrate holding member. Therefore, a plurality of the circuit boards can be held with a simple configuration. Further, according to the substrate fixing structure described in claim 4, in the substrate fixing structure described in claim 3, the light emitting element is mounted on each of the plurality of circuit boards, and an optical path corresponding to the light emitting element is provided. Therefore, even when the light emitting element is mounted on the plurality of circuit boards, the light of the light emitting element can be easily recognized from the outside with a simple configuration. Further, according to the substrate fixing structure described in claim 5, in the substrate fixing structure described in claim 4, since a plurality of substrate holding members are installed for each optical path, the substrate holding member can have a simpler configuration. Further, according to the substrate fixing structure described in claim 6, in the substrate fixing structure described in claim 4, a single substrate holding member provided with a plurality of the optical paths is installed. Therefore, the circuit board can be held with a simpler configuration and the visibility can be improved. Further, according to the substrate fixing structure described in claim 7, in the substrate fixing structure described in any one of claims 1 to 6, since the substrate holding portion is a concave portion, the circuit board can be reliably held with a simple configuration. Further, according to the substrate fixing structure described in claim 8, in the substrate fixing structure described in any one of claims 1 to 6, since the substrate holding portion is a pressing portion that presses and holds the circuit board against the housing, the circuit board can be reliably held with a simple configuration. Further, according to the substrate fixing structure described in claim 9, in the substrate fixing structure described in any one of claims 1 to 8, since the optical path is made of the same material as the substrate holding member, a simpler configuration can be achieved. Further, according to the actuator described in claim 10, since it includes the substrate fixing structure described in any one of claims 1 to 8, the apparatus can be miniaturized and a light guide function can be provided with a simple configuration.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0010] Hereinafter, with reference to Figs. 1 to 6, the first embodiment of the present invention will be described. As shown in Figs. 1 and 2, the actuator 1 has a housing 3, and a table 5 is movably installed in the housing 3. Further, the actuator 1 has a controller case 7. The controller case 7 is installed behind the housing 3 (the right side in Fig. 2). A connector 9 is connected to the rear of the controller case 7 (the right side in Fig. 2). A motor (not shown) is installed inside the rear end side of the housing 3 (the right side in Fig. 2), and the table 5 is reciprocated in the front-rear direction (the left-right direction in Fig. 2) by a screw shaft nut mechanism (not shown) by the motor (not shown).

[0011] As shown in Fig. 3, for example, an encoder board 11, a controller board 13, and a motor driver board 15 are installed inside the controller case 7. An encoder circuit 12 for measuring the rotation speed of the motor (not shown) is mounted on the encoder board 11. Also, a motor driver circuit 16 for driving the motor (not shown) is mounted on the motor driver board 15. Further, a controller circuit 14 for controlling the motor driver circuit 16 is mounted on the controller board 13. A light emitting element 17 is mounted on the left side of the controller board 13 in Fig. 3, and a light emitting element 19 is mounted on the right side of the motor driver board 15 in Fig. 3.

[0012] The controller case 7 is composed of a controller case main body 21 and a controller case lid 23. The controller case main body 21 is fixed to the housing 3 by fixing screws 22, and the controller case lid 23 is fixed to the controller case main body 21 by fixing screws 24.

[0013] As shown in FIGS. 2 and 3, an encoder board accommodating portion 25 is provided at the back (the left side in FIG. 2) inside the controller case main body 21. Also, inside the controller case main body 21 and on the right side in FIG. 2 from the encoder board accommodating portion 25, there is a stepped portion 26, and a controller board accommodating portion 27 is provided here.

[0014] Light guiding openings 31 and 33 are formed in the controller case main body 21, and light guiding openings 35 and 37 are formed in the controller case lid 23. When the controller case main body 21 and the controller case lid 23 are integrated, the light guiding opening 31 and the light guiding opening 35 are integrated, and the light guiding opening 33 and the light guiding opening 37 are integrated. Moreover, an engaging recess 38 for a board holding member is formed on the left side in FIG. 3 of the light guiding opening 31 of the controller case main body 21, and an engaging recess 39 for a board holding member is formed on the right side in FIG. 3 of the light guiding opening 33 of the controller case main body 21.

[0015] As shown in FIGS. 1 to 4, a board holding member 41 is installed in the controller case 7. The board holding member 41 is made of integrally molded transparent resin (for example, polycarbonate), and as shown in FIGS. 5 and 6, a board holding member main body 43 extending left and right in FIG. 6(a), a light guiding portion 45 provided on one side in the width direction of the board holding member main body 43 (the left side in FIG. 6(a)), and a light guiding portion 47 provided on the other side in the width direction of the board holding member main body 43 (the right side in FIG. 6(a)) are provided.

[0016] An engaging convex portion 48 is formed on the outer side surface (the left side surface in FIG. 6(a)) of the light guide portion 45. Further, an engaging convex portion 49 is formed on the outer side surface (the right side surface in FIG. 6(a)) of the light guide portion 47. The substrate holding member 41 engages the engaging convex portion 48 with the engaging concave portion 38 for the substrate holding member and engages the engaging convex portion 49 with the engaging concave portion 39 for the substrate holding member, and is installed on the controller case main body 21. At this time, for example, as shown in FIG. 1, one end side (the upper left side in FIG. 1) of the light guide portion 45 is accommodated in the light guide opening 31 of the controller case main body 21, and one end side (the upper left side in FIG. 1) of the light guide portion 47 is accommodated in the light guide opening 33 of the controller case main body 21. Further, when the controller case main body 21 and the controller case lid 23 are integrated, the other end side (the lower right side in FIG. 1) of the light guide portion 45 is accommodated in the light guide opening 35 of the controller case lid 23, and the other end side (the lower right side in FIG. 1) of the light guide portion 47 is accommodated in the light guide opening 37 of the controller case lid 23.

[0017] As shown in FIG. 6(c), a concave portion 51 as a substrate holding portion is formed on the bottom surface side (the front side in FIG. 6(c)) of the substrate holding member main body 43.

[0018] Here, the holding of the encoder substrate 11, the controller substrate 13, and the motor driver substrate 15 in the controller case 7 will be described. First, the encoder substrate 11 is accommodated in the encoder substrate accommodating portion 25 and fixed to the controller case main body 21 by fixing screws 61, 61.

[0019] For example, as shown in FIGS. 4(a) and 4(b), the controller board 13 is housed in the controller board housing portion 27. When the controller case lid 23 is attached to the controller case main body 21, the controller board 13 is pressed toward the step portion 26 side (the left side in FIG. 4(a)) by the pressing portion 62 as the substrate holding portion at the left end of the light guide portion 47 of the substrate holding member 41 in FIG. 4(a). Also, as shown in FIG. 2, the motor driver board 15 is engaged and held in the recess 51. Also, for example, as shown in FIG. 3, engaging recesses 64 and 66 are formed at both ends in the width direction (the direction from the lower left to the upper right in FIG. 3) of the upper side edge of the motor driver board 15 in FIG. 3. The light guide portion 45 is engaged with the engaging recess 64, and the light guide portion 47 is engaged with the engaging recess 66.

[0020] With such a configuration, the substrate holding member 41 holds the controller board 13 and the motor driver board 15, and the light guide portion 47 functions as a spacer between the controller board 13 and the motor driver board 15. Also, as shown in FIG. 3, there is a spacer 63 between the controller board 13 and the motor driver board 15. The controller board 13 and the motor driver board 15 are fixed by passing a fixing screw 65 through the controller board 13, the spacer 63, and the motor driver board 15 and screwing it into the controller case main body 21.

[0021] Also, as shown in FIGS. 4(a) and 4(b), an optical path 71 is provided in the light guide portion 47, and the light emitted from the light emitting element 19 on the motor driver board 15 is guided to the outside of the controller case 7. Also, as shown in FIG. 4(b), an optical path 73 is provided in the light guide portion 45, and the light emitted from the light emitting element 17 on the controller board 13 is guided to the outside of the controller case 7.

[0022] Next, the operation according to this first embodiment will be described. The actuator 1 rotates a motor (not shown), and reciprocates the table 5 in the front-rear direction (left-right direction in Fig. 2) by a screw shaft nut mechanism (not shown).

[0023] During the operation of the actuator 1, the light-emitting element 17 of the controller board 13 and the light-emitting element 19 of the motor driver board 15 emit light, indicating the state of the actuator 1. The light emitted from the light-emitting element 17 passes through the light guide portion 45 of the board holding member 41, and is guided to the outside through the light guide opening 31 of the controller case body 21 and the light guide opening 35 of the controller case lid 23. Further, the light emitted from the light-emitting element 19 passes through the light guide portion 47 of the board holding member 41, and is guided to the outside through the light guide opening 33 of the controller case body 21 and the light guide opening 37 of the controller case lid 23.

[0024] The board holding member 41 holds the motor driver board 15 by engaging with the recess 51. In a state where the controller case lid 23 is attached to the controller case body 21, the pressing portion 62 of the light guide portion 47 presses the controller board 13 toward the step portion 26 side (left side in Fig. 4(a)) to hold the controller board 13, and the light guide portion 47 functions as a spacer between the controller board 13 and the motor driver board 15.

[0025] Next, the effects of the first embodiment will be described. First, since the board holding member 41 is provided with the light guide portion 45 and the light guide portion 47, the actuator 1 can be miniaturized, and a light guide function for guiding the light emission of the light-emitting elements 17 and 19 to the outside of the controller case 7 can be provided with a simple configuration. In addition, since the light guide portions 45 and 47 are exposed to the outside of the controller case 7, the light of the light-emitting elements 17 and 19 can be easily recognized from the outside with a simple configuration. In addition, since the light guide part 45 and the light guide part 47 are provided on one substrate holding member 41, the controller substrate 13 and the motor driver substrate 15 can be held with a simpler configuration, and the visibility of the light emitting elements 17 and 19 can be enhanced. In addition, since the recessed part 51 is provided as the substrate holding part, the controller substrate 13 and the motor driver substrate 15 can be surely held with a simple configuration. In addition, since the controller substrate 13 is pressed and held by the light guide part 47, the controller substrate 13 can be surely held with a simple configuration. In addition, since the substrate holding member 41 is an integral body of the substrate holding member main body 43 and the light guide parts 45 and 47, a simpler configuration can be achieved.

[0026] Next, a second embodiment of the present invention will be described with reference to FIG. 7. In this second embodiment, a motor driver substrate 101, a substrate holding member 103, and a substrate holding member (not shown) are used.

[0027] The motor driver substrate 101 has the same configuration as the motor driver substrate 15 in the above-described first embodiment, but the engaging recesses 64 and 66 are not provided. In addition, the substrate holding member 103 has substantially the same configuration as the light guide part 47 of the substrate holding member 41 in the above-described first embodiment, and a recess 105 engaged with the motor driver substrate 101 is provided. In addition, an optical path 107 is provided in the substrate holding member 103, and the light emitted from the light emitting element 19 on the motor driver substrate 101 is guided to the outside of the controller case 7.

[0028] In addition, the substrate holding member (not shown) has substantially the same configuration as the light guide part 45 of the substrate holding member 41 in the above-described first embodiment, and a recess engaged with the motor driver substrate 101 is provided. In addition, a pressing part for pressing the controller substrate 13 is provided in the substrate holding member (not shown). In addition, an optical path (not shown) is provided in the substrate holding member (not shown), and light emitted from a light emitting element (not shown) on the controller substrate 13 is guided to the outside of the controller case 7.

[0029] Also in the case of this second embodiment, the same operations and effects as those of the above-described first embodiment are exhibited. Note that components common to the above-described first embodiment are denoted by the same reference numerals and the description thereof is omitted.

[0030] Note that the present invention is not limited to the above-described first and second embodiments. It is also conceivable that a light guiding portion that functions as a spacer between a plurality of circuit boards is provided in the substrate holding member. In this case, it is conceivable that only the substrate holding member is used as a spacer between the circuit boards and no spacer of another member is provided. It is also conceivable that the recess is provided not only in the substrate holding member main body but also on the light guiding portion side. It is also conceivable to provide a substrate holding portion as a plurality of recesses. It is also conceivable that a plurality of substrate holding members are provided for each light guiding portion. It is also conceivable to provide a plurality of substrate holding portions. In addition to the table type, various types of actuators such as a rod type, a slider type, and a gripper type are conceivable. In addition, the illustrated configuration is merely an example.

Industrial Applicability

[0031] The present invention relates to a substrate fixing structure and an actuator, and in particular, to an invention devised so that an apparatus can be miniaturized and a light guide function can be provided with a simple configuration, and is suitable for, for example, an industrial robot.

Explanation of Reference Numerals

[0032] 1 Actuator 7 Controller case (housing) 13 Controller board (circuit board) 15 Motor driver board (circuit board) 17 Light-emitting element 19 Light-emitting element 41 Substrate holding member 45 Light guide part 47 Light guide part 51 Recess (substrate holding part) 62 Pressing part (substrate holding part) 71 Optical path 73 Optical path 101 Motor driver board (circuit board) 103 Substrate holding member 105 Recess (substrate holding part) 107 Optical path

Claims

1. a plurality of circuit boards on which light-emitting elements are mounted; a housing that houses the plurality of circuit boards; a substrate holding member provided with a plurality of substrate holding portions for holding the plurality of circuit boards in the housing; comprising; the substrate holding member is provided with an optical path for guiding light emitted from the light-emitting element; a part of the substrate holding portions among the plurality of substrate holding portions are recesses with which a part of the circuit boards among the plurality of circuit boards are engaged; a substrate fixing structure, wherein the other substrate holding portions among the plurality of substrate holding portions are pressing portions that press and hold the other circuit boards among the plurality of circuit boards against the housing.

2. The substrate fixing structure according to claim 1, wherein a part of the substrate holding member is exposed outside the housing.

3. In the substrate fixing structure according to claim 1 or claim 2, the light-emitting element is mounted on each of the plurality of circuit boards, and the substrate fixing structure is characterized in that the optical path corresponding to the light-emitting element is provided.

4. In the substrate fixing structure according to claim 3, the substrate fixing structure is characterized in that a plurality of substrate holding members are installed for each optical path.

5. In the substrate fixing structure according to claim 3, the substrate fixing structure is characterized in that one substrate holding member provided with a plurality of the optical paths is installed.

6. In the substrate fixing structure according to any one of claims 1 to 5, the substrate fixing structure is characterized in that the optical path is made of the same material as the substrate holding member.

7. An actuator comprising the substrate fixing structure according to any one of claims 1 to 6.

Images