阅读说明：本技术 与壳体内电路板的端子连接结构 (Terminal connecting structure with circuit board in shell ) 是由 佐藤雄一 渋谷稔 羽泽弘幸 尾﨑真一 宫川佳之 山积良宽 于 2021-05-24 设计创作，主要内容包括：本发明提供一种与壳体内电路板的端子连接结构,其中,嵌入结合有多个端子部件的树脂制的保持件与具有连接器部且构成壳体的一部分的树脂制的壳体部件嵌入结合,端子部件的一端部与收容于壳体内的电路板连接,该端子部件的另一端部配置于连接器部内,防止由保持件保持的端子部件彼此之间因水分而引起短路。保持件(81)以将露出孔(83、84)作为空洞保留的方式嵌入结合于壳体部件(29),在壳体部件(29)形成有与露出孔(83、84)相通并向收容室(40)侧开放的开放孔(87、88)。(The invention provides a terminal connection structure with a circuit board in a housing, wherein a resin holder combined with a plurality of terminal components in an embedded manner is combined with a resin housing component which has a connector part and forms a part of the housing in an embedded manner, one end part of the terminal component is connected with the circuit board accommodated in the housing, the other end part of the terminal component is arranged in the connector part, and short circuit caused by moisture between the terminal components held by the holder is prevented. The holder (81) is fitted into and coupled to the case member (29) so as to leave the exposure holes (83, 84) as a cavity, and open holes (87, 88) that communicate with the exposure holes (83, 84) and are open to the storage chamber (40) side are formed in the case member (29).)

1. A terminal connection structure to a circuit board in a housing, wherein the housing (23) has a resin housing member (29) in which a connector portion (29b) is integrally formed, a housing chamber (40) is formed in the housing (23), one end portions of a plurality of terminal members (80) are connected to the circuit board (41) housed in the housing chamber (40), the plurality of terminal members (80) are fitted and coupled to a resin holder (81), and an exposure hole (83, 84) for exposing a part of the terminal members (80) is formed in the holder (81), the holder (81) is fitted and coupled to the housing member (29) so that the other end portions of the terminal members (80) are disposed in the connector portion (29b), the terminal connection structure to the circuit board in the housing is characterized in that,

the holder (81) is fitted into and bonded to the case member (29) so as to leave the exposure holes (83, 84) as a cavity, and open holes (87, 88) that communicate with the exposure holes (83, 84) and are open to the storage chamber (40) side are formed in the case member (29).

2. A terminal connection structure with a circuit board in a housing according to claim 1,

the exposure holes (83, 84) are formed in the holder (81) at positions facing a part of the terminal member (80) except for both end portions.

3. A terminal connection structure with a circuit board in a housing according to claim 1 or 2,

a communication hole (90) for communicating the outside of the housing member (29) with the housing chamber (40) is formed in the housing member (29).

Technical Field

The present invention relates to a terminal connection structure to a circuit board in a housing, the housing having a resin housing member integrally formed with a connector portion, the housing having a housing chamber formed therein, one end portions of a plurality of terminal members connected to the circuit board housed in the housing chamber, the plurality of terminal members being fitted and coupled to a resin holder, the holder having an exposure hole formed therein for exposing a part of the terminal members, the holder being fitted and coupled to the housing member so that the other end portions of the terminal members are disposed in the connector portion.

Background

Patent document 1 discloses a vehicle push button switch device for releasing a latch of a vehicle door such as a tailgate, and the vehicle push button switch device has a configuration in which: a resin holder to which a plurality of terminal members, one end of which is connected to a circuit board housed in a case and the other end of which is disposed in the connector portion, are fitted and coupled to a resin case member that has the connector portion facing the vehicle interior and constitutes a part of the case.

Documents of the prior art

Patent document 1: japanese patent No. 6260874

Disclosure of Invention

Problems to be solved by the invention

Further, after the primary molding in which the plurality of terminal members are fitted and coupled to the resin holder is completed, the holder is formed with exposure holes for trimming for cutting the coupling portions for coupling the plurality of terminal members to each other to release the coupling, or exposure holes for fixing the terminal members for preventing deformation of the terminal members at the time of insert molding, and in the structure disclosed in patent document 1, the exposure holes are filled with a secondary molding resin at the time of secondary molding in which the holder is fitted and coupled to the case member, and a boundary is formed between the primary molding resin and the secondary molding resin at a portion corresponding to the inner side surface of the exposure hole. Therefore, when moisture in the air enters from the connector portion side facing the vehicle interior side through the gap between the terminal member and the primary mold resin, the moisture reaches between the terminal members adjacent to each other along the boundary between the primary mold resin and the secondary mold resin at the portion corresponding to the exposure hole, and there is a possibility that a short circuit occurs between the terminal members.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a terminal connection structure to a circuit board in a housing, which can prevent a short circuit caused by moisture between terminal members held by a holder.

Means for solving the problems

In order to achieve the above object, the present invention is a terminal connection structure to a circuit board in a housing, the housing having a resin housing member in which a connector portion is integrally formed, a housing chamber formed in the housing, one end portions of a plurality of terminal members connected to the circuit board housed in the housing chamber, the plurality of terminal members being fitted and coupled to a resin holder, the holder having an exposure hole formed therein for exposing a part of the terminal members, the holder being fitted and coupled to the housing member so that the other end portions of the terminal members are disposed in the connector portion, the terminal connection structure to the circuit board in the housing being characterized as a first feature,

the holder is fitted into and coupled to the case member so as to hold the exposure hole as a hollow, and the case member is formed with an open hole that communicates with the exposure hole and is open to the housing chamber side.

In addition to the configuration according to the first aspect, the present invention has a second aspect in which the exposure hole is formed in the holder at a position facing a part of the terminal member except for both end portions.

In addition to the configuration according to the first or second aspect, a third aspect of the present invention is that the housing member is provided with a communication hole that communicates the outside of the housing member with the housing chamber.

Effects of the invention

According to the first aspect of the present invention, since the exposure hole of the holder remains as a hollow after the holder is fitted into and coupled to the case member and no boundary is formed between the primary mold resin forming the holder and the secondary mold resin forming the case member at the portion corresponding to the inner side surface of the exposure hole, even if moisture in the air enters from the connector portion through the gap between the terminal member and the primary mold resin, a short circuit due to moisture does not occur between the terminal members at the portion where the hole is exposed.

Further, according to the second aspect of the present invention, the range of the exposure hole formed in the holder can be reduced as much as possible, and the portion of the mold for forming the holder, in which the exposure hole is formed, can be minimized, thereby reducing the cost of the mold.

Further, according to the third aspect of the present invention, the communication hole formed in the housing member can prevent a pressure difference from being generated between the pressure outside the housing member and the pressure inside the housing chamber. Thus, even if moisture in the air enters the exposure hole side from the connector portion through the gap between the terminal member and the primary mold resin, the moisture can be suppressed from being absorbed into the housing chamber side. That is, in the case where the housing chamber is a space independent from the outside, the pressure in the housing chamber is reduced at low temperature, and thus the moisture entering the exposure hole may be sucked into the housing chamber and may fall down.

Drawings

Fig. 1 is a perspective view of a vehicle as viewed from the rear.

Fig. 2 is an enlarged sectional view taken along line 2-2 of fig. 1.

Fig. 3 is a perspective view of the tailgate and the trim cover in a state where they are omitted, as viewed from the direction of arrow 3 in fig. 2.

Fig. 4 is a cross-sectional view taken along line 4-4 of fig. 3.

Fig. 5 is a sectional view taken along line 5-5 in fig. 3.

Fig. 6 is a longitudinal sectional view of the vehicle push button device in the push-button operation state, corresponding to fig. 2.

Fig. 7 is a view in the direction of arrow 7 in fig. 6.

Fig. 8 is an exploded perspective view of the first case member and the push button as viewed from below.

Fig. 9 is a perspective view of the button.

Fig. 10 is a cross-sectional view taken along line 10-10 of fig. 3.

Fig. 11 is a cross-sectional view taken along line 11-11 of fig. 7.

Fig. 12 is a perspective view showing the terminal member in a state (a) before fitting and coupling to the holder and in a state (b) before fitting and coupling to the holder.

Fig. 13 is a cross-sectional view taken along line 13-13 of fig. 7.

Description of the reference symbols

23: a housing;

29: a housing component;

29 b: a connector section;

40: a housing chamber;

41: a circuit board;

80: a terminal member;

81: a holder;

83. 84: exposing a hole;

87. 88: opening the hole;

90: and a communicating hole.

Detailed Description

First, in fig. 1, a tailgate 15 as a cover is openably and closably attached to a rear portion of a vehicle body B of a passenger vehicle so as to be openable upward, and a rear glass 17 is provided on an upper portion of the tailgate 15. A decorative cover 19 is fixed to a widthwise central portion of the outer panel 16 of the tailgate 15 so as to be disposed below the rear glass 17, and a license plate 18 disposed below the decorative cover 19 is fixed to a widthwise central portion of the outer panel 16.

In fig. 2, the trim cover 19 is formed to be open toward the tailgate 15 and to bulge out from the tailgate 15 toward the rear of the vehicle, the trim cover 19 is fixed to the outer panel 16 of the tailgate 15, and a first seal member 20 connected in a ring shape is interposed between an opening edge portion of the trim cover 19 on the tailgate 15 side and the outer panel 16.

The terminal connection structure to the circuit board in the case of the present invention is applied to the vehicle push switch device 21 in the present embodiment, and the vehicle push switch device 21 is attached to the tailgate 15 so as to be housed in the trim cover 19. In this embodiment, the vehicle push button switch device 21 is switchable between a locked state and an unlocked state of all doors other than the tailgate 15, and the tailgate 15 is switchable from a latched state to an unlatched state, and an operation opening 22 for operating the vehicle push button switch device 21 is provided in a bottom portion of the trim cover 19.

Referring to fig. 3 to 6 together, the vehicle push switch device 21 includes: a housing 23 fixed to the outer panel 16; and a first switch 24 and a second switch 25 fixedly disposed within the housing 23, the switches 24, 25 being tact switches in the present embodiment.

The first switch 24 is used to unlock all doors other than the tailgate 15 and to set the tailgate 15 in the unlatched state, and when a legitimate user is confirmed by bidirectional communication between a portable device carried by a vehicle user and the vehicle in a state where the switch mode of the first switch 24 is changed by a pressing operation, all doors other than the tailgate 15 are in the unlocked state and only the tailgate 15 is automatically in the unlatched state by electric driving and is in the open state. After confirming that the user is a regular user, all doors other than the tailgate 15 may be unlocked by changing the opening/closing mode of the first switch 24, and only the tailgate 15 may be unlocked.

The second switch 25 is used to set all doors other than the tailgate 15 in a locked state, and when a legitimate user is confirmed by bidirectional communication between a portable device carried by a vehicle user and the vehicle in a state where the switch mode of the second switch 25 is changed by a pressing operation, all doors other than the tailgate 15 are set in a locked state. After confirming that the user is authorized, all doors other than the tailgate 15 may be locked by changing the opening/closing mode of the second switch 25. The reason why the vehicle push-button switch device 21 provided in the tailgate 15 is provided with the second switch 25 for locking all doors other than the tailgate 15 is to eliminate the trouble: in order to lock the other doors after closing the tailgate 15, a lock switch provided in the driver's seat side door is intentionally pressed.

The case 23 is formed by joining a first case member 29 and a second case member 30 each formed of a synthetic resin, and a flat mounting plate portion 29a formed in the first case member 29 is mounted on the outer panel 16. Further, the first case member 29 is formed such that: when the tailgate 15 to which the housing 23 is attached is in a closed state, the first housing member 29 is in a bowl shape that opens downward. On the other hand, the second case member 30 is coupled to the lower open edge of the first case member 29 so as to close a part of the lower open end of the first case member 29. The second case member 30 has a first recess 31, the first recess 31 is recessed so that a user's hand can be inserted from the operation opening 22 of the trim cover 19 and the first recess 31 projects into the first case member 29, and an opening 32 is formed in a portion of the first recess 31 that is located rearward in the closed state of the tailgate 15.

Referring also to fig. 7, the first case member 29 is provided with a pair of first positioning pins 33 projecting from the mounting plate portion 29a at positions spaced apart in the vehicle width direction, and a pair of bolts 34 projecting from the mounting plate portion 29a are molded and joined so as to be disposed on the vehicle width direction outer sides of the first positioning pins 33. Further, a connector portion 29b that protrudes toward the vehicle inside at an intermediate portion between the pair of first positioning pins 33 is integrally formed on the mounting plate portion 29a of the first case member 29.

The first positioning pin 33, the bolt 34, and the connector portion 29b penetrate the outer panel 16, and the first case member 29, that is, the case 23 is attached to the outer panel 16 by screwing and fastening a nut 35 (see fig. 2) into the bolt 34 penetrating the outer panel 16 from the inside of the outer panel 16.

A second seal member 36 annularly connected so as to surround one of the pair of first positioning pins 33, one of the pair of bolts 34, and the connector portion 29b, and a third seal member 37 annularly connected so as to surround the other of the pair of first positioning pins 33 and the other of the pair of bolts 34 are interposed between the mounting plate portion 29a and the outer panel 16.

The cover member 39 has a second recess 38 at an outer peripheral edge portion of the second housing member 30 to which the cover member 39 is attached, the second recess 38 having a shape corresponding to the first recess 31 of the second housing member 30 and being disposed in the first recess 31, the cover member 39 being made of an elastic material such as rubber, and the opening 32 being closed by the cover member 39.

Referring also to fig. 8, the housing 23 has a housing chamber 40 therein communicating with the opening 32, a circuit board 41 extending substantially horizontally in the vehicle width direction is housed in the housing chamber 40, and the circuit board 41 is fixedly disposed on the side of the first housing member 29 opposite to the connector portion 29 b. That is, the circuit board 41, which is positioned by a pair of second positioning pins 43 integrally protruding from the first case member 29, is fastened to the first case member 29 by a plurality of, for example, a pair of screw members 42.

The first switch 24 and the second switch 25 are housed in the housing chamber 40 and are disposed on the lower surface of the circuit board 41. The first switch 24 is disposed at a substantially central portion of the circuit board 41 in the vehicle width direction, and the second switch 25 is disposed at a right end portion of the circuit board 41 in the vehicle width direction.

A push button 44 capable of being pushed to open and close the first switch 24 is supported by the housing 23, and the push button 44 is pushed in a direction obliquely upward rearward as indicated by an arrow 45 in fig. 6. On the other hand, since the first switch 24 is disposed on the lower surface of the substantially horizontal circuit board 41, the switching direction of the first switch 24 is substantially upward as indicated by an arrow 46 in fig. 6. That is, the first switch 24 is disposed on the circuit board 41 so that the switch operation direction 46 is different from the pressing operation direction 45 of the push button 44.

A pressing direction switching member 47 is interposed between the push button 44 and the first switch 24, and the pressing direction switching member 47 is operated in response to a pressing operation of the push button 44 to press the first switch 24 in the switch operation direction 46.

The pressing direction switching member 47 integrally has: a pressure receiving portion 47a extending in the vehicle width direction and crossing the first switch 24 from a side opposite to the circuit board 41; a pair of first leg portions 47b provided continuously at right angles in the vicinity of both ends in the longitudinal direction of the pressure receiving portion 47a, penetrating the circuit board 41 and extending upward; and a bridge portion 47c that connects the pair of first leg portions 47b above the circuit board 41, and the pressing direction conversion member 47 is formed of a synthetic resin.

The pressure receiving portion 47a of the end portion of the pressing direction switching member 47 on the button 44 side receives the pressing force from the button 44, and is formed to have an arc-shaped longitudinal sectional shape on the button 44 side.

The circuit board 41 is provided with a pair of notches 50 disposed on both sides of the first switch 24 in the vehicle width direction, and the pair of first leg portions 47b of the pressing direction conversion member 47 are disposed so as to penetrate the notches 50.

The pair of first legs 47b of the pressing direction conversion member 47 is fitted into a first slide recess 51 provided in the first case member 29 so as to be slidable in the switch operation direction 46 while the relative position of the pressing direction conversion member 47 with respect to the first switch 24 in the direction perpendicular to the switch operation direction 46 is determined to be constant.

The first housing member 29 is provided with: a first spring receiving portion 52 that is raised from a closed end of the first sliding recessed portion 51 so as to be disposed between the pair of first leg portions 47b of the pressing direction conversion member 47; and a rod-shaped first spring guide 53, the first spring guide 53 protruding from a central portion of the first spring receiving portion 52. On the other hand, the bridge portion 47c of the pressing direction switching member 47 is provided with: a third recess 54 opened toward the first spring receiving portion 52 side; and a through hole 55 communicating with a central portion of the third concave portion 54 so that the first spring guide 53 is inserted therethrough, wherein the first spring guide 53 is inserted through the third concave portion 54 and the through hole 55, and a distal end portion of the first spring guide 53 abuts against an upper surface of the circuit board 41.

A first coil spring 56 that biases the pressing direction switching member 47 in a direction opposite to the opening/closing direction 46 is provided between the bridge portion 47c of the pressing direction switching member 47 and the first spring receiving portion 52 of the first housing member 29 of the housing 23.

An LED 57 is mounted on the circuit board 41 at the vehicle front-rear direction rear side of the second switch 24, and an inner lens 58 covering the LED 57 is mounted on the circuit board 41. In addition, 2 portions adjacent to each other of the portions of the second case member 30 of the case 23 corresponding to the inner lenses 58 are formed as outer lenses 59 for irradiating light toward the license plate 18.

Referring also to fig. 9, the button 44 is formed to integrally have: a button main portion 44a formed in a substantially rectangular shape so as to be disposed in the opening portion 32 of the housing 23; a first shaft portion 44b projecting from a left end portion in the vehicle width direction of an upper portion of the button main portion 44 a; a second shaft portion 44c projecting from a vehicle width direction right side end portion of an upper portion of the button main portion 44 a; and a third shaft portion 44d disposed at a vehicle width direction center portion of an upper portion of the button main portion 44 a.

Further, on a surface of the button main portion 44a facing the storage chamber 40 side, a flat pressing surface 60 is formed so as to be disposed at a center portion in the vehicle width direction near a lower end portion of the button main portion 44a, and a plurality of reinforcing ribs 44e intersecting each other are integrally formed.

The second recess 38 of the cover member 39 is formed with a first pressing operation portion 39a that is formed by fitting a part of the button main portion 44a from the side of the housing chamber 40 and projects outward. The pressing surface 60 of the button 44 abuts against the pressure receiving portion 47a of the pressing direction conversion member 47, and the button main portion 44a of the button 44 is sandwiched between the cover member 39 and the pressing direction conversion member 47 biased by the first coil spring 56.

The first shaft portion 44b, the second shaft portion 44c, and the third shaft portion 44d are formed to have coaxial circular cross sections, and a through hole 61 facing a lower portion of the third shaft portion 44d is formed in the button main portion 44 a.

First, second, and third shaft support portions 62, 63, 64 for rotatably supporting the first to third shaft portions 44b, 44C, 44d of the push button 44 are provided at an upper portion of the first case member 29, the shaft support portions 62 to 64 are formed to have a substantially C-shaped cross-sectional shape that opens toward the rear side in the vehicle front-rear direction, and a portion of the third shaft support portion 64 is inserted through the through hole 61.

The cover member 39 is formed with a second pressing operation portion 39b that has an oblong shape elongated in the vehicle front-rear direction and bulges outward, at a position on the vehicle width direction right side of the second recessed portion 38, and a slider 71 slides in response to a pressing operation force applied to the second pressing operation portion 39b to open and close the second switch 25, and the slider 71 is slidably supported by the first housing member 29.

Referring also to fig. 10, the slider 71 is formed of a synthetic resin and integrally includes: a switch pressing portion 71a that can press the second switch 25 and faces the second switch 25 from below; a spring force acting portion 71b formed to extend long in the vehicle width direction so as to protrude from the circuit board 41 and provided continuously with a vehicle front-rear direction front portion of the switch pressing portion 71 a; a pair of second leg portions 71c which are provided continuously at right angles to the vicinity of both ends in the longitudinal direction of the spring force application portion 71b, penetrate the circuit board 41, and extend upward; a pressure receiving portion 71d having an oblong shape elongated in the vehicle front-rear direction and connected to the switch pressing portion 71a and the spring force acting portion 71 b; and an abutment arm portion 71e that protrudes laterally from 4 locations of the pressure receiving portion 71d that are spaced apart in the circumferential direction.

A through hole 72 corresponding to the second pressing operation portion 39b is formed in the second case member 30. A part of the pressure receiving portion 71d is inserted through the through hole 72 and fitted to the second pressing operation portion 39b from the housing chamber 40 side, and the contact arm portion 71e is in contact with the second case member 30 from the housing chamber 40 side around the through hole 82.

The pair of second leg portions 71c of the slider 71 are fitted into a second sliding recess 74 provided in the first case member 29 so as to be slidable in the switch operation direction 70 while the relative position of the slider 71 with respect to the second switch 25 in the direction perpendicular to the switch operation direction 70 of the second switch 25 is determined to be constant.

The first housing member 29 is provided with: a second spring receiving portion 73 that rises from a closed end of the second sliding recessed portion 74 at a position corresponding to the spring force acting portion 71b of the slider 71; and a rod-shaped second spring guide 75 protruding from the second spring receiving portion 73. A second coil spring 76 that biases the slider 71 in a direction opposite to the switching direction 70 of the second switch 25 is provided between the second spring receiving portion 73 and the spring force acting portion 71b, and the second coil spring 76 is disposed around the second spring guide 75.

In fig. 11, one end portions of a plurality of, for example, 6 terminal members 80 are inserted and connected to the circuit board 41, and a connection terminal portion 80a formed at the other end portions of the terminal members 80 is disposed in the connector portion 29b of the first case member 29 constituting a part of the case 23.

Referring also to fig. 12, the plurality of terminal members 80 are fitted into and coupled to a resin holder 81, and the holder 81 is fitted into and coupled to the first case member 29 so that the connection terminal portions 80a are disposed in the connector portion 29 b.

The terminal members 80 are formed in a shape curved in accordance with the shape of the portion of the first case member 29 where the terminal members 80 are disposed, and in a state before the terminal members are fitted into and coupled to the holder 81, the terminal members 80 are coupled to each other by a coupling portion 82 for keeping the relative arrangement of the terminal members 80 constant, as shown in fig. 12 (a).

As shown in fig. 12 (b), the terminal member 80 is fitted into and coupled to the holder 81, and the holder 81 includes: a first exposure hole 83 for cutting the connecting portion 82 connecting the plurality of terminal members 80 to each other to release the connection; and a second exposure hole 84 for fixing a terminal member, which prevents deformation of the terminal member 80 when insert-molded with the holder 81. That is, the first and second exposing holes 83 and 84 are formed in the holder 81 at positions facing a part of the terminal member 80 except for both end portions.

As clearly shown in fig. 11, the holder 81 is fitted into and coupled to the first case member 29 so as to hold the first and second exposure holes 83 and 84 as a cavity, and the first case member 29 is formed with first and second open holes 87 and 88 that communicate with the first and second exposure holes 83 and 84, respectively, and are open to the housing chamber 40 side in the case 23.

Referring also to fig. 13, the first case member 29 is provided with, for example, a pair of communication holes 90 for communicating the outside of the first case member 29 with the housing chamber 40.

The communication hole 90 is formed in the mounting plate portion 29a of the first housing member 29 at a portion surrounded by the second seal member 36, and in the present embodiment, the communication hole 90 is formed in the mounting plate portion 29a so as to be arranged in the left-right direction between the connector portion 29b and the first positioning pin 33.

Further, a substantially U-shaped brim 91 that covers the pair of communication holes 90 from above and from the side and is formed to open downward is integrally provided on the outer surface of the mounting plate portion 29a in a protruding manner.

Next, the operation of this embodiment will be described, in which one end portions of a plurality of (6 in this embodiment) terminal members 80 are connected to a circuit board 41 which is housed in a housing chamber 40 in a housing 23 and fixed to the housing 23, the plurality of terminal members 80 are fitted and coupled to a resin-made holder 81 having first and second exposure holes 83, 84 facing a part of the terminal members 80, a connector portion 29b is integrally formed with the resin-made first housing member 29 constituting a part of the housing 23 and projects toward the vehicle interior side, the holder 81 is fitted and coupled to the first housing member 29 with a connection terminal portion 80a of the other end portion of the terminal members 80 being disposed on the connector portion 29b, and the holder 81 is fitted and coupled to the first housing member 29 so as to leave the first and second exposure holes 83, 84 as a hollow, first and second open holes 87 and 88 that communicate with the first and second exposure holes 83 and 84 and open to the housing chamber 40 side are formed in the first case member 29.

Therefore, the first and second exposure holes 83 and 84 of the holder 81 remain as cavities after the holder 81 is fitted and coupled to the first case member 29, and no boundary is formed between the primary mold resin forming the holder 81 and the secondary mold resin forming the first case member 29 at the portions corresponding to the inner surfaces of the first and second exposure holes 83 and 84. Therefore, even if moisture in the air enters from the connector portion 29b through the gap between the terminal member 80 and the primary mold resin, a short circuit due to moisture between the terminal members 80 does not occur in the portions of the first and second exposure holes 83 and 84.

Further, since the first and second exposing holes 83 and 84 are formed in the holder 81 at positions facing a part of the terminal member 80 except for both end portions, the ranges of the first and second exposing holes 83 and 84 formed in the holder 81 can be made as small as possible, the portions of the mold forming the holder 81 where the first and second exposing holes 83 and 84 are formed can be minimized, and the mold cost can be reduced.

Further, since the communication hole 90 for communicating the outside of the first case member 29 with the housing chamber 40 is formed in the first case member 29, it is possible to prevent a pressure difference from occurring between the pressure outside the first case member 29 and the pressure inside the housing chamber 40 through the communication hole 90. Accordingly, even if moisture in the air enters the first and second exposure holes 83 and 84 from the connector portion 29b through the gap between the terminal member 80 and the primary mold resin, the moisture can be prevented from being absorbed into the housing chamber 40. That is, in the case where the inside of the housing chamber 40 is a space independent from the outside, the moisture entering the first and second exposure holes 83 and 84 may be sucked into the housing chamber 40 and dropped due to a decrease in the pressure in the housing chamber 40 at a low temperature, but the communication hole 90 is formed in the first case member 29, thereby preventing such a situation from occurring.

While the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various design changes may be made without departing from the scope of the present invention described in the claims.

For example, in the above-described embodiment, the vehicle button device 21 is described as an example of the terminal connection structure to the circuit board in the housing, but the present invention can be widely applied to the following structure: a housing member which constitutes a part of a housing having a housing chamber for housing a circuit board and which integrally has a connector section is fitted and coupled with a plurality of terminal members provided between the connector section and the circuit board, and a holder having an exposure hole facing a part of the terminal members is fitted and coupled with the housing member.