Drive device

Abstract

A driving device is helpful for improving the stability of electrical connection between a terminal and the outside. The driving device provided by the utility model comprises a shell, wherein a through hole is formed in the wall part of the shell; a circuit board that blocks the through-hole from the inside of the housing, and to which a terminal that extends into the through-hole and is electrically connected to the outside is connected; and a moisture-proof agent applied to a portion of an inner wall surface of the wall portion on one side of the through hole in the first direction, in which a boss is provided on the inner wall surface, the boss having a first convex portion extending along an edge of the through hole on one side in the first direction, and the second convex portion having a second convex portion extending along an edge of the through hole on the other side in the first direction. A suppression structure is provided at the first convex portion, and the suppression structure suppresses the moisture-proof agent from entering a gap between an edge of one side of the circuit board in the first direction and an edge of one side of the through hole in the first direction from one side in the first direction and a side close to an inner wall surface.

Description

Technical Field

[0001] The utility model relates to a driving device. Background Art

[0002] In the past, there was a driving device including: a housing, a through hole being provided in a wall portion of the housing; and a circuit board, the circuit board closing the through hole from the inside of the housing, and a terminal extending into the through hole and for electrically connecting to the outside being connected to the circuit board.

[0003] In the above driving device, soldering of the terminal is often required. In this way, foreign matters are likely to remain inside the housing, which may cause problems such as short circuits. Therefore, it is necessary to clean the inside of the housing.

[0004] On the other hand, with the miniaturization of the above driving device, the internal space of the housing becomes smaller, and the cleaning operation becomes difficult. For this reason, the inventor thought of applying a moisture-proof agent to a portion of the circuit board covering the through hole.

[0005] However, when the moisture-proof agent is applied to a portion of the circuit board covering the through hole and its periphery, sometimes the moisture-proof agent leaks into the through hole due to increased fluidity during high-temperature drying after application, thereby covering parts such as the root of the terminal in the through hole. In this way, for example, when connecting an external connector to the terminal in the through hole, problems such as unstable power-on are likely to occur, and it is likely that the driving device cannot operate stably. Summary of the Utility Model

[0006] The utility model is completed in view of the above problems, and the purpose is to provide a driving device, which helps to improve the stability of the electrical connection between the terminal and the outside.

[0007] To achieve the above purpose, the utility model provides a driving device including: a housing, a through hole being provided in a wall portion of the housing; a circuit board, the circuit board closing the through hole from the inside of the housing, and a terminal extending into the through hole and for electrically connecting to the outside being connected to the circuit board; and a moisture-proof agent, the moisture-proof agent being applied to a portion of the inner wall surface of the wall portion on a side in a first direction closer to the through hole, wherein a boss is provided on the inner wall surface, the boss having a first convex portion extending along an edge on a side in the first direction of the through hole, and a suppression structure is provided at the first convex portion, the suppression structure suppressing the moisture-proof agent from entering a gap between an edge on a side in the first direction of the circuit board and an edge on a side in the first direction of the through hole from a side in the first direction and closer to the inner wall surface.

[0008] According to the driving device of the present utility model, a boss is provided on the inner wall surface of the housing. The boss has a first convex portion extending along the edge of one side in the first direction of the through hole. A restraining structure is provided at the first convex portion. The restraining structure restrains the moisture-proof agent from entering the gap between the edge of one side of the circuit board in the first direction and the edge of one side of the through hole in the first direction from one side in the first direction and close to the inner wall surface. Therefore, in a state where the moisture-proof agent is coated on the portion of the inner wall surface of the housing on the side closer to the first direction than the through hole, when the driving device is arranged with one side in the first direction being consistent with the upper side (the opposite direction of the vertical direction) for high-temperature drying, even if the fluidity of the moisture-proof agent is improved, the restraining structure can restrain the moisture-proof agent from leaking into the through hole due to the action of gravity, which helps to improve the stability of the electrical connection between the terminals and the outside.

[0009] In addition, in the driving device of the present utility model, preferably, the restraining structure is a first guiding groove that opens toward one side in the first direction and extends along the edge of one side in the first direction of the through hole.

[0010] According to the driving device of the present utility model, the restraining structure is a first guiding groove that opens toward one side in the first direction and extends along the edge of one side in the first direction of the through hole. Therefore, when manufacturing the housing by resin molding, demolding is easy; and in a state where the moisture-proof agent is coated on the portion of the inner wall surface of the housing on the side closer to the first direction than the through hole, when the driving device is arranged with one side in the first direction being consistent with the upper side for high-temperature drying, the moisture-proof agent can be restrained from entering the gap between the edge of one side of the circuit board in the first direction and the edge of one side of the through hole in the first direction with a simple structure.

[0011] In addition, in the driving device of the present utility model, preferably, a second guiding groove is provided on the inner wall surface. The second guiding groove communicates with at least one end in the length direction of the first guiding groove, opens toward the side away from the inner wall surface, and extends along at least one side edge of the through hole in the second direction intersecting the first direction.

[0012] According to the driving device of the present utility model, a second guiding groove is provided on the inner wall surface. The second guiding groove communicates with at least one end in the length direction of the first guiding groove, opens towards the side away from the inner wall surface, and extends along at least one side edge in the second direction that intersects the first direction of the through hole. Therefore, when the driving device is arranged with the side in the first direction being consistent with the upper side for high-temperature drying in a state where a moisture-proof agent is coated on the part of the inner wall surface of the housing on the side of the through hole in the first direction, even if the fluidity of the moisture-proof agent increases, the moisture-proof agent in the first guiding groove easily flows into the second guiding groove from the end of the first guiding groove and is guided downward by the second guiding groove, preventing the moisture-proof agent in the first guiding groove from overflowing into the gap between the edge of the side of the circuit board in the first direction and the edge of the side of the through hole in the first direction.

[0013] In addition, in the driving device of the present utility model, it is preferable that the end of the second guiding groove on the other side in the first direction is closer to the other side in the first direction than the edge of the through hole on the other side in the first direction.

[0014] According to the driving device of the present utility model, the end of the second guiding groove on the other side in the first direction is closer to the other side in the first direction than the edge of the through hole on the other side in the first direction. Therefore, it is possible to prevent the moisture-proof agent accumulated at the end of the second guiding groove on the other side in the first direction from entering the through hole through the gap between the edge of the through hole on the other side in the second direction and the circuit board, further improving the stability of the electrical connection between the terminals and the outside.

[0015] In addition, in the driving device of the present utility model, it is preferable that the inhibiting structure is a shielding portion that covers the side edge of the circuit board from the side in the first direction.

[0016] According to the driving device of the present utility model, the inhibiting structure is a shielding portion that covers the side edge of the circuit board from the side in the first direction. Therefore, when the driving device is arranged with the side in the first direction being consistent with the upper side for high-temperature drying in a state where a moisture-proof agent is coated on the part of the inner wall surface of the housing on the side of the through hole in the first direction, even if the fluidity of the moisture-proof agent increases, it is easy to reliably prevent the moisture-proof agent from entering the gap between the edge of the side of the circuit board in the first direction and the edge of the side of the through hole in the first direction from the side in the first direction.

[0017] In addition, in the driving device of the present utility model, it is preferable that the surface of the shielding portion facing the side in the first direction is an inclined surface and is inclined in such a way that it is closer to the other side in the first direction as it is farther from the inner wall surface.

[0018] According to the driving device of the present utility model, the surface of the shielding portion on the side facing the first direction is an inclined surface, and it is inclined in such a way that the farther away from the inner wall surface, the closer it is to the other side in the first direction. Therefore, in a state where a moisture-proof agent is coated on a portion of the inner wall surface of the housing on the side of the through hole in the first direction, when the driving device is arranged with the side in the first direction being consistent with the upper side for high-temperature drying, even if the fluidity of the moisture-proof agent is increased, it is easy to guide the moisture-proof agent downward to the gap between the edge of the side of the circuit board in the first direction and the edge of the side of the through hole in the first direction, and inhibit the accumulation of the moisture-proof agent near the gap between the edge of the side of the circuit board in the first direction and the edge of the side of the through hole in the first direction.

[0019] In addition, in the driving device of the present utility model, it is preferable that the circuit board abuts against the shielding portion from the other side in the first direction.

[0020] According to the driving device of the present utility model, the circuit board abuts against the shielding portion from the other side in the first direction. Therefore, when a moisture-proof agent is coated on the portion of the circuit board covering the through hole, it helps to inhibit the moisture-proof agent from entering the gap between the edge of the side of the circuit board in the first direction and the edge of the side of the through hole in the first direction.

[0021] In addition, in the driving device of the present utility model, it is preferable that the first direction is the up-and-down direction, and the side in the first direction is the upper side.

[0022] In addition, in the driving device of the present utility model, it is preferable that the boss has a second convex portion extending along the edges of the two sides of the through hole that intersect (not limited to perpendicular) with the first direction in the second upward direction.

[0023] According to the driving device of the present utility model, the boss has a second convex portion extending along the edges of the two sides of the through hole that intersect with the first direction in the second upward direction. Therefore, it helps to more reliably inhibit the moisture-proof agent from entering the gap between the edge of the circuit board and the edge of the through hole.

[0024] In addition, in the driving device of the present utility model, it is preferable that the circuit board abuts against the entire peripheral edge of the through hole.

[0025] According to the driving device of the present utility model, the circuit board abuts against the entire peripheral edge of the through hole. Therefore, when a moisture-proof agent is coated on the portion of the circuit board covering the through hole, it helps to more reliably inhibit the moisture-proof agent from entering the gap between the edge of the circuit board and the edge of the through hole.

[0026] In addition, in the driving device of the present utility model, it is preferable that the circuit board is a rectangle with one side perpendicular to the first direction, and in the extending direction of the one side, the portion of the circuit board covering the through hole is within the range of the inhibiting structure.

[0027] According to the driving device of the present utility model, the circuit board is a rectangle with one side perpendicular to the first direction. In the extending direction of one side, the part of the circuit board covering the through hole is within the range of the inhibiting structure. Therefore, it helps to more reliably inhibit the entry of the moisture-proof agent into the gap between the edge of one side of the circuit board in the first direction and the edge of one side of the through hole in the first direction.

[0028] In addition, in the driving device of the present utility model, it is preferable that a motor is provided in the housing, and the motor is electrically connected to the circuit board.

[0029] (Effect of the utility model)

[0030] According to the present utility model, a convex platform is provided on the inner wall surface of the housing. The convex platform has a first convex portion extending along the edge of one side of the through hole in the first direction. An inhibiting structure is provided at the first convex portion, and the inhibiting structure inhibits the moisture-proof agent from entering the gap between the edge of one side of the circuit board in the first direction and the edge of one side of the through hole in the first direction from one side in the first direction. Therefore, in a state where the moisture-proof agent is coated on the part of the inner wall surface of the housing on the side of the through hole in the first direction, when the driving device is arranged with one side in the first direction being consistent with the upper side (the opposite direction of the vertical direction) for high-temperature drying, even if the fluidity of the moisture-proof agent increases, the inhibiting structure can inhibit the moisture-proof agent from leaking into the through hole due to the action of gravity, which helps to improve the stability of the electrical connection between the terminals and the outside. Description of the drawings

[0031] Figure 1 It is a top view schematically showing the driving device of the embodiment of the present utility model, in which a part of the housing and a part of the inner components are omitted.

[0032] Figure 2 It is a partially enlarged perspective view schematically showing the driving device of the embodiment of the present utility model.

[0033] Figure 3 It is a partially enlarged perspective view schematically showing the driving device of the modified example of the present utility model.

[0034] (Symbol description)

[0035] 1 Driving device

[0036] 10 Housing

[0037] 11 Bottom wall

[0038] 111 Receiving groove

[0039] 12 Side wall

[0040] 121 First side wall

[0041] 122 Second side wall

[0042] 123 Third side wall

[0043] 124 Fourth side wall

[0044] 125 Cylindrical part

[0045] 1231 Boss

[0046] 12311 First convex part

[0047] 12312 Second convex part

[0048] 20 Circuit board

[0049] 21 First part

[0050] 22 Second part

[0051] 23 Third part

[0052] 29 Terminal

[0053] 30 Moisture-proof agent

[0054] 40 Motor

[0055] TH Through hole

[0056] SS Suppression structure

[0057] GV1 First guide groove

[0058] GV2 Second guide groove

[0059] SH Shielding part Specific embodiments

[0060] Next, in combination with Figure 1 and Figure 2 the driving device according to the embodiments of the present invention will be described. Among them, Figure 1 is a schematic top view of the driving device according to the embodiments of the present invention, in which a part of the housing and a part of the inner components are omitted, Figure 2 is a schematic partial enlarged perspective view of the driving device according to the embodiments of the present invention.

[0061] Here, for convenience of description, three mutually orthogonal directions are set as the X direction, the Y direction, and the Z direction, and one side of the X direction is set as X1, the other side of the X direction is set as X2, one side of the Y direction is set as Y1, the other side of the Y direction is set as Y2, one side of the Z direction is set as Z1, and the other side of the Z direction is set as Z2.

[0062] (Overall structure of the driving device)

[0063] As Figure 1 and Figure 2 shown, the drive device 1 includes: a housing 10 having a through hole TH in its wall; a circuit board 20 that closes the through hole TH from the inside of the housing 10, and a terminal 29 that is connected to the circuit board 20 and extends into the through hole TH for external electrical connection; and a moisture-proof agent 30 that is applied to a portion of the inner wall surface of the above-mentioned wall portion on the Z1 direction side (equivalent to one side in the first direction) of the through hole TH in the Z direction (equivalent to the first direction); and a boss 1231 is provided on the inner wall surface of the housing 10, the boss 1231 has a first convex portion 12311 extending along the edge of the through hole TH on the Z1 direction side, and a suppression structure SS is provided at the first convex portion 12311, and the suppression structure SS suppresses the moisture-proof agent 30 from entering the gap between the edge of the circuit board 20 on the Z1 direction side and the edge of the through hole TH on the Z1 direction side from the Z1 direction side and the Y1 direction side (i.e., the side close to the above-mentioned inner wall surface).

[0064] Here, as Figure 1 shown, a motor 40 is provided in the housing 10. The motor 40 is electrically connected to the circuit board 20.

[0065] In addition, although not shown, the drive device 1 further includes an output shaft and a gear set. The output shaft protrudes from the housing 10. The gear set is provided in the housing 10 and transmits the output of the motor 40 to the output shaft.

[0066] (Structure of the housing)

[0067] As Figure 1 shown, the housing 10 is generally rectangular parallelepiped-shaped.

[0068] Here, as Figure 1As shown, the housing 10 includes a bottom wall 11 and side walls 12. The bottom wall 11 is generally plate-shaped with the thickness direction consistent with the Z direction. A receiving groove 111 for receiving a part of the circuit board 20 is provided on the bottom wall 11. The receiving groove 111 is adjacent to the side walls 12. Although not shown, support portions for supporting the motor 40 and the respective gears of the gear set are also provided at positions on the bottom wall 11 other than the receiving groove 111. The side walls 12 are cylindrical and extend from the peripheral edge of the bottom wall 11 toward the Z1 direction side. The side walls 12 include: a first side wall 121 that is generally plate-shaped with the thickness direction consistent with the X direction; a second side wall 122 that is opposite to the first side wall 121 on the X2 direction side and is generally plate-shaped with the thickness direction consistent with the X direction; a third side wall 123 that is generally plate-shaped with the thickness direction consistent with the Y direction; and a fourth side wall 124 that is opposite to the third side wall 123 on the Y2 direction side and is generally plate-shaped with the thickness direction consistent with the Y direction. A through hole TH penetrates the third side wall 123 in the Y direction. The through hole TH is generally rectangular with one side consistent with the X direction when viewed in the Y direction. On the outer wall surface of the third side wall 123, a cylindrical portion 125 is formed so as to surround the through hole TH.

[0069] Here, although not shown, the housing 10 further includes a top wall. The top wall abuts against the entire peripheral edge of the end portion of the side walls 12 on the Z1 direction side from the Z1 direction. The output shaft projects to the outside through the top wall, for example.

[0070] (Structure of the circuit board)

[0071] As Figure 1 and Figure 2 shown, the circuit board 20 is a flexible printed circuit board.

[0072] Here, the circuit board 20 abuts against the entire peripheral edge of the through hole TH.

[0073] In addition, as Figure 1 and Figure 2 shown, in the X direction (i.e., the extending direction of one side of the through hole TH), the portion of the circuit board 20 covering the through hole TH is within the range of the suppression structure SS.

[0074] Specifically, the circuit board 20 includes: a first portion 21 with the thickness direction perpendicular to the Z direction and electrically connected to the motor 40; a second portion 22 that extends from the end portion of the first portion 21 on the Z2 direction side toward the X1 direction side and is received in the receiving groove 111; and a third portion 23 that stands up from the end portion of the second portion 22 on the Y1 direction side toward the Z1 direction and covers the through hole TH. In the X direction, the third portion 23 is within the range of the suppression structure SS.

[0075] Here, as Figure 1 and Figure 2As shown, at least one terminal 29 is connected to the third part 23 of the circuit board 20. Specifically, a plurality (four in the illustrated example, but not limited thereto) of terminals 29 are arranged in the X direction on the third part 23 of the circuit board 20, and are provided at the end of the third part 23 of the circuit board 20 in the Z1 direction. During manufacturing, the terminal 29 is electrically connected to the circuit board 20 by soldering, for example.

[0076] (Suppression Structure and Its Peripheral Structures)

[0077] As Figure 2 shown, the suppression structure SS is the first guiding groove GV1. The first guiding groove GV1 opens toward the Z1 direction side and extends along the edge of the through hole TH on the Z1 direction side, that is, extends in the X direction.

[0078] Here, as Figure 2 shown, the side wall on the Y2 direction side of the first guiding groove GV1, that is, the side wall closer to the circuit board 20, is formed at the edge on the Y2 direction side of the first convex portion 12311, and the side wall surface facing the inside of the first guiding groove GV1 is inclined so as to be closer to the Y2 direction as it is closer to the Z1 direction.

[0079] In addition, as Figure 2 shown, a second guiding groove GV2 is further provided on the inner wall surface of the housing 10. The second guiding groove GV2 communicates with the first guiding groove GV1 on both sides in the X direction (equivalent to the second direction) (that is, communicates with both ends in the length direction of the first guiding groove GV1), opens toward the Y2 direction side, and extends along the edges on both sides of the through hole TH in the X direction. And the second guiding groove GV2 extends toward the Z2 direction side to the bottom wall 11 of the housing 10 and extends toward the Z1 direction side to the end surface on the Z1 direction side of the side wall 12. It can also be said that on the third side wall 123, a recess is formed that surrounds the boss 1231 from the Z1 direction side and both sides in the X direction. And the end on the Z2 direction side of the second guiding groove GV2 is closer to the Z2 direction side than the edge on the Z2 direction side of the through hole TH.

[0080] (Coating and Drying of Moisture-Proof Agent)

[0081] When coating the moisture-proof agent 30, for example, the driving device 1 is set such that the Z1 direction side is consistent with the upper side, and then the moisture-proof agent 30 is sprayed from the Z1 direction side and the Y2 direction side toward the Z2 direction side and the Y1 direction side at least on the portion of the circuit board 20 covering the through hole TH. Preferably, after the coating of the moisture-proof agent 30 is completed, the moisture-proof agent 30 covers the entire bottom surface of the receiving groove 111, the portion of the inner wall surface of the third side wall 123 corresponding to the receiving groove 111 in the X direction, the portion of the circuit board 20 covering the through hole TH, and the boss 1231.

[0082] When drying the moisture-proof agent 30, for example, the driving device 1 is set such that the Z1 direction side is aligned with the upper side, and then high-temperature drying is performed.

[0083] (Main effects of this embodiment)

[0084] According to the driving device 1 of this embodiment, a boss 1231 is provided on the inner wall surface of the housing 10. The boss 1231 has a first convex portion 12311 extending along the edge of the Z1 direction side of the through hole TH. A suppression structure SS is provided at the first convex portion 12311. The suppression structure SS suppresses the moisture-proof agent 30 from entering the gap between the edge of the Z1 direction side of the circuit board 20 and the edge of the Z1 direction side of the through hole TH from the Z1 direction side and the Y1 direction side. Therefore, in a state where the moisture-proof agent 30 is coated on the portion of the inner wall surface of the third side wall 123 of the housing 10 that is closer to the Z1 direction than the through hole TH, when the driving device 1 is set such that the Z1 direction side is aligned with the upper side (the opposite direction of the vertical direction) for high-temperature drying, even if the fluidity of the moisture-proof agent 30 increases, the suppression structure SS can suppress the moisture-proof agent 30 from leaking into the through hole TH due to the action of gravity, which helps to improve the stability of the electrical connection between the terminal 29 and the outside.

[0085] In addition, according to the driving device 1 of this embodiment, the suppression structure SS is the first guiding groove GV1. The first guiding groove GV1 opens toward the Z1 direction side and extends along the edge of the Z1 direction side of the through hole TH. Therefore, when manufacturing the housing 10 by resin molding, demolding is easy; and in a state where the moisture-proof agent 30 is coated on the portion of the inner wall surface of the third side wall 123 of the housing 10 that is closer to the Z1 direction than the through hole TH, when the driving device 1 is set such that the Z1 direction side is aligned with the upper side for high-temperature drying, the moisture-proof agent 30 can be suppressed from entering the gap between the edge of the Z1 direction side of the circuit board 20 and the edge of the Z1 direction side of the through hole TH with a simple structure.

[0086] In addition, in the driving device 1 according to the present embodiment, a second guiding groove GV2 is further provided on the inner wall surface of the housing 10. The two sides of the second guiding groove GV2 in the X direction communicate with the first guiding groove GV1, open toward the Y2 direction side, and extend along the edges on both sides of the through hole TH in the X direction. Therefore, in a state where the moisture-proof agent 30 is coated on the portion of the inner wall surface of the third side wall 123 of the housing 10 on the Z1 direction side of the through hole TH, when the driving device 1 is arranged with the Z1 direction side facing upward for high-temperature drying, even if the fluidity of the moisture-proof agent 30 increases, the moisture-proof agent 30 in the first guiding groove GV1 easily flows from the end of the first guiding groove GV1 into the second guiding groove GV2 and is guided downward by the second guiding groove GV2, preventing the moisture-proof agent 30 in the first guiding groove GV1 from overflowing into the gap between the edge of the Z1 direction side of the circuit board 20 and the edge of the Z1 direction side of the through hole TH.

[0087] In addition, in the driving device 1 according to the present embodiment, the end portion of the second guiding groove GV2 on the Z2 direction side is on the Z2 direction side of the portion of the circuit board 20 covering the through hole TH. Therefore, it is possible to prevent the moisture-proof agent 30 accumulated at the end portion of the second guiding groove GV2 on the Z2 direction side from entering the through hole TH through the gap between the edge of the Z2 direction side of the through hole TH and the circuit board 20, further improving the stability of the electrical connection between the terminal 29 and the outside.

[0088] The present utility model has been described exemplarily above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above embodiments.

[0089] For example, in the above embodiment, the driving device 1 can be used to drive a valve to open and close.

[0090] In addition, in the above embodiment, in the extending direction of the edge on the Z1 direction side of the through hole TH, the portion of the circuit board 20 covering the through hole TH may also partially extend beyond the range of the suppression structure SS.

[0091] In addition, in the above embodiment, the second guiding groove GV2 may also be provided only on one side of the first guiding groove GV1 in the X direction. Depending on the situation, the second guiding groove GV2 may also be omitted.

[0092] In addition, in the above embodiment, the suppression structure SS is the first guiding groove GV1, but it is not limited thereto. As Figure 3 shown, the suppression structure SS may also be a shielding portion SH that covers the side edge of the circuit board 20 from the Z1 direction side.

[0093] In the above case, as Figure 3As shown, it is preferable that the surface of the shielding portion SH facing the Z1 direction side is an inclined surface, and it is inclined in such a way that the farther away from the inner wall surface of the housing 10, i.e., the Y1 direction side, the closer it is to the Z2 direction side. Alternatively, it can also be as Figure 3 shown, the entire surface of the first convex portion 12311 facing the Z1 direction side is an inclined surface, and it is inclined in such a way that the farther away from the inner wall surface of the housing 10, i.e., the Y1 direction side, the closer it is to the Z2 direction side. And, it is preferable that the circuit board 20 abuts against the shielding portion SH from the Z2 direction side.

[0094] In the above case, as Figure 2 and Figure 3 shown, it is preferable that the boss 1231 further has a second convex portion 12312 extending along the edges on both sides in the X direction of the through hole TH.

[0095] In addition, in the above embodiment, the end portion on the Z2 direction side of the second guide groove GV2 is closer to the Z2 direction side than the portion of the circuit board 20 covering the through hole TH, i.e., the third portion 23. However, it is not limited thereto. The end portion on the Z2 direction side of the second guide groove GV2 may also be flush with the end portion on the Z2 direction side of the third portion 23 of the circuit board 20, or may be closer to the Z1 direction side than the end portion on the Z2 direction side of the third portion 23 of the circuit board 20.

[0096] In addition, in the above embodiment, the cross-sectional shape of the through hole TH is not limited to a rectangle, and it can also be other shapes such as a triangle, a circle, etc.

[0097] It should be understood that within its scope, the present utility model can freely combine each part in the embodiment, or appropriately deform or omit each part in the embodiment.

Claims

1. A driving device, comprising: A housing, a through-hole is provided in the wall portion of the housing; A circuit board that blocks the through-hole from the inside of the housing, and terminals that extend into the through-hole and are used for external electrical connection are connected to the circuit board; and a moisture-proof agent that is coated on a part of the inner wall surface of the wall portion, and this part is located on one side in the first direction with respect to the through-hole. It is characterized in that A boss is provided on the inner wall surface, and the boss has a first convex portion that extends along the edge on one side in the first direction of the through-hole. A suppression structure is provided at the first convex portion, and the suppression structure suppresses the moisture-proof agent from entering the gap between the edge on one side in the first direction of the circuit board and the edge on one side in the first direction of the through-hole from the side in the first direction and close to the inner wall surface.

2. The driving device according to claim 1, characterized in that The suppression structure is a first guiding groove that opens toward the side in the first direction and extends along the edge on one side in the first direction of the through-hole.

3. The driving device according to claim 2, characterized in that A second guiding groove is provided on the inner wall surface, and the second guiding groove communicates with at least one end in the length direction of the first guiding groove, opens toward the side away from the inner wall surface, and extends along at least one side edge in the second direction that intersects the first direction of the through-hole.

4. The driving device according to claim 3, characterized in that The end on the other side in the first direction of the second guiding groove is closer to the other side in the first direction than the edge on the other side in the first direction of the through-hole.

5. The driving device according to claim 1, characterized in that The suppression structure is a shielding portion that covers the side edge of the circuit board from the side in the first direction.

6. The driving device according to claim 5, characterized in that The surface of the shielding portion facing the side in the first direction is an inclined surface, and is inclined in such a way that it gets closer to the other side in the first direction as it gets farther away from the inner wall surface.

7. The driving device according to claim 5, characterized in that The circuit board abuts against the shielding portion from the other side in the first direction.

8. The driving device according to claim 1, characterized in that The boss has a second convex portion that extends along the edges on both sides in the second direction that intersects the first direction of the through-hole. The circuit board abuts against the entire periphery of the through-hole.

9. The driving device according to claim 1, characterized in that The circuit board is rectangular with one side perpendicular to the first direction. In the extending direction of the one side, the portion of the circuit board covering the through-hole is within the range of the suppression structure.

10. The driving device according to any one of claims 1 to 9, characterized in that A motor is provided in the housing. The motor is electrically connected to the circuit board.

Images