Switching device and switching module

Abstract

A switch device is provided with: an operation member having an operation part for performing a push-in operation and a placement part on which a movable contact is placed; a housing that accommodates the mounting portion of the operation member and has a through-hole that exposes the operation portion of the operation member to the housing; the reset part is used for enabling the operation part to restore to the original position; the plurality of fixed contacts are fixed in the shell; a movable contact provided on the mounting portion of the operating member; the movable contact and the plurality of fixed contacts are switched in a conductive state through the movement of the operation part, and the electric connector is characterized in that the fixed contacts are provided with conductive parts accommodated in the shell and a plurality of external terminals exposed out of the shell, and the conductive parts are arranged on the side, opposite to the operation part, of the bottom surface side of the shell, and the external terminals are arranged on the side, opposite to the operation part, of the fixed contacts. And the waterproof platform wraps the root parts of the plurality of external terminals and protrudes towards the direction far away from the operation part along the extension direction of the external terminals.

Description

Technical Field

[0001] This utility model relates to a switching device and a switching module having the switching device. Background Technology

[0002] A known switching device (see Technical Document 1) is used to switch the conduction state between a fixed contact and a movable contact by pushing in an operating part at the top of an operating component. A pair of parallel downward-pointing external terminals protrude from the bottom surface of the switching device's housing, and these external terminals output a signal indicating the conduction state to the outside via a wiring board. To prevent water from entering between these external terminals and causing a short circuit, in the prior art, the pair of external terminals, along with the wiring board, are sealed together using thermoplastic molding on the side of the switching device where they are located.

[0003] Technical Document 1: CN202712006U

[0004] While the aforementioned switchgear structure meets the IP67 waterproof performance test standard (IP67 refers to being submerged at 1m underwater for 30 minutes), it fails to meet the more stringent HINZ waterproof test requirements. (The HINZ waterproof test conditions involve immersion in 90°C for 30 minutes followed by immersion in 5% saline solution for 5 minutes.) Under HINZ waterproof test conditions, the switchgear exhibits a short circuit between terminals. The cause is likely due to thermal expansion and contraction at the junction of the housing's bottom surface and the seal, allowing water to seep in through the gaps. When water penetrates between the pair of external terminals, a short circuit occurs.

[0005] To meet the more stringent waterproofing requirements, we hope to design a switch device with better waterproofing performance. Utility Model Content

[0006] This utility model was made in view of the above-mentioned problems, and its purpose is to provide a switch device with good waterproof effect and a switch module having the switch device.

[0007] The switching device of technical solution one comprises: an operating member having an operating part for performing a push-in operation and a mounting part for mounting a movable contact; a housing housing the mounting part of the operating member and having a through hole that exposes the operating part of the operating member in the housing; a reset member for returning the operating member to its original position; a plurality of fixed contacts fixed within the housing; and a movable contact disposed in the mounting part of the operating member; wherein the movement of the operating member enables switching between the conductive state of the movable contact and the plurality of fixed contacts, characterized in that the fixed contacts have a conductive part housed within the housing and a plurality of external terminals exposed in the housing, and a waterproof platform on the bottom surface of the housing, opposite to the operating part, has a base that covers the roots of the plurality of external terminals and protrudes in the direction away from the operating part along the extension direction of the external terminals.

[0008] According to technical solution one, by setting a waterproof platform that wraps around the base of the external terminals, the surface distance between the two external terminals is increased, so even if water enters from the bottom side of the housing, short circuits are less likely to occur between the external terminals.

[0009] The switching device of technical solution two is characterized in that the waterproof platform has: a plurality of anchor portions on the bottom side of the housing, at the location of the plurality of external terminals, protruding in a direction away from the operating part in a manner that wraps around the outer periphery of each of the plurality of external terminals.

[0010] According to technical solution 2, by setting an anchor portion that wraps around the outer periphery of each of the external terminals, the surface distance between the two external terminals is increased, so even if water enters from the bottom side of the housing, short circuits are not likely to occur between the external terminals.

[0011] The switching device of technical solution three is characterized in that the waterproof platform has: a stepped portion, which protrudes in a direction away from the operating portion on the bottom side of the housing, in a manner that covers the central portion of the outer bottom surface of the housing and wraps around the root of the external terminal; and a plurality of anchor portions, which protrude from the stepped portion in a direction away from the operating portion at the location of the plurality of external terminals, in a manner that wraps around the outer periphery of each of the plurality of external terminals.

[0012] According to technical solution three, by setting a stepped portion and an anchor portion located on the bottom side of the stepped portion, the surface distance between the two external terminals is increased, so that even if water enters from the bottom side of the housing, short circuits are less likely to occur between the external terminals.

[0013] The switching device of technical solution four is characterized in that the waterproof platform further has a blocking part, the blocking part is disposed between the plurality of anchor parts, and the blocking part protrudes in a direction away from the operating part along the extension direction of the external terminal.

[0014] According to technical solution four, by setting a blocking part between multiple anchor parts, the surface distance of water between the two external terminals is further increased, which can further improve the waterproofness of the switch device.

[0015] The switching device of technical solution five is characterized in that the anchor portion has multiple segments formed in the extension direction of the external terminal, and in a plane direction parallel to the bottom surface of the housing, the anchor portion has a middle segment with a cross-sectional area smaller than that of the two end segments.

[0016] According to technical solution five, the bonding strength between the anchor and the thermoplastic seal on the outside of the anchor can be increased, the surface distance of water between the two external terminals can be increased, and the waterproofness of the switch device can be further improved.

[0017] The switching device of technical solution six is ​​characterized in that the blocking part has multiple segments formed in the extension direction of the external terminal, and in the plane direction parallel to the bottom surface of the housing, the blocking part has a middle segment with a cross-sectional area smaller than that of the two end segments.

[0018] According to technical solution six, the bonding strength between the blocking part and the thermoplastic seal on the outside of the blocking part can be increased, the surface distance of water between the two external terminals can be increased, and the waterproofness of the switching device can be further improved.

[0019] The switching device of technical solution seven is characterized in that the bottom surface area of ​​the housing is greater than the bottom surface area of ​​the step portion, and the bottom surface area of ​​the step portion is greater than the bottom surface area of ​​the anchor portion and the blocking portion.

[0020] The switching device of technical solution eight is characterized in that the housing is composed of a frame with an opening at the bottom and a base plate that is fastened to the opening, the plurality of fixed contacts are integrally fixed to the base plate by insertion molding, and the base plate and the waterproof platform are made of the same resin material.

[0021] According to technical solution eight, by making the base plate and the waterproof platform of the same material, the base plate and the waterproof platform can be molded using a single mold. For example, the fixing contact can be fixed to the base plate by curing while the fixing contact is inserted into the mold. This eliminates gaps between the external terminals of the fixing contact and the waterproof platform, preventing water from easily penetrating the interior of the switching device even if water seeps in from the bottom side of the housing. Furthermore, by using a resin material to form the base plate and the waterproof platform, a greater bonding force can be generated when joining with thermoplastic seals compared to using metal materials.

[0022] The switching device of technical solution nine is characterized in that the housing is composed of a frame with an opening at the top and a cover plate that is fastened to the opening, the plurality of fixed contacts are integrally fixed to the frame by insertion molding, and the frame and the waterproof platform are made of the same resin material.

[0023] According to technical solution nine, by making the frame and the waterproof platform from the same resin material, the frame and the waterproof platform can be molded using a single mold. For example, the fixing contact can be fixed to the frame by curing while it is inserted into the mold, thus eliminating gaps between the external terminals of the fixing contact and the waterproof platform. Even if water seeps in from the bottom side of the housing, it is difficult for water to penetrate into the interior of the switching device. Furthermore, by using a resin material to form the frame and the waterproof platform, a greater bonding force can be generated when joining with thermoplastic seals compared to using metal materials.

[0024] The switching device of technical solution ten is characterized in that three switching devices are arranged in parallel, and the external terminals of each switching device output a detection signal indicating the switching of the conduction state to the outside via a common wiring substrate. The waterproof platform, the external terminals and the common wiring substrate are wrapped by a thermoplastic seal.

[0025] According to technical solution ten, the detected signal indicating the switching of the conduction state can be output to the outside with good waterproof performance.

[0026] The switch module of technical solution eleven is characterized in that it has three switch devices arranged in parallel according to any one of technical solutions one to three, the external terminals of each switch device output a detection signal indicating the switching of the conduction state to the outside via a common wiring substrate, and the waterproof platform, the external terminals and the common wiring substrate are wrapped by a thermoplastic seal.

[0027] According to technical solution eleven, multiple detection signals indicating the switching of conduction state can be output to the outside with good waterproof performance.

[0028] Technical effect

[0029] We provide switchgear and switch modules that meet higher waterproof requirements, making it difficult for water to penetrate the interior of the switchgear, and preventing short circuits between external terminals even if water penetrates to the external terminals. Attached Figure Description

[0030] Figure 1 This is a front view of the switching device according to the first embodiment.

[0031] Figure 2 This is an exploded perspective view of the switching device according to the first embodiment.

[0032] Figure 3 An exploded perspective view showing the operating components, movable contacts, reset components, and fixed contacts.

[0033] Figure 4A It is a three-dimensional diagram showing the combined state of the base plate, waterproof platform, and fixed contacts in a switching device. Figure 4B yes Figure 4A Top view.

[0034] Figure 5 It is along Figure 4B A cross-sectional view along line AA.

[0035] Figure 6 yes Figure 4A A bottom view.

[0036] Figure 7 This is a schematic diagram of a switching device in a first variation of the first embodiment.

[0037] Figure 8 This is a schematic diagram of a switching device in a second variation of the first embodiment.

[0038] Figure 9A , Figure 9B This is a perspective view of the switching device of the third variation of the first embodiment. Figure 9A This indicates that three parallel switching devices are connected to a shared wiring board. Figure 9B This indicates that a seal is formed on the outside of the switching device and wiring board by thermoplastic molding.

[0039] Explanation of reference numerals in the attached figures

[0040] 1 Switching device 11 Operating component 11t Operating part 11r Sleeve 11k Mounting part 12, 12' Housing 12a Through hole 13 Base plate 13a Mounting part 14 Frame P Sealing part 15 Fixed contact 15a Common fixed contact 15b Switching fixed contact 15i Conducting part 15o External terminal 16 Movable contact 16t Top surface 16a, 16b Elastic wall part 17 Reset component 20 Waterproof platform 20s Step part 20a, 20a' Anchor part 20b, 20b' Blocking part 30 Frame 40 Cover plate rt Root part Detailed Implementation

[0041] (First Implementation)

[0042] The switching device of the first embodiment includes: an operating member having an operating part for performing a push-in operation and a mounting part for mounting a movable contact; a housing having the mounting part of the operating member and having a through hole that exposes the operating part of the operating member in the housing; a reset member for returning the operating member to its original position; a plurality of fixed contacts fixed within the housing; a movable contact disposed in the mounting part of the operating member; and a switching of the conductive state between the movable contact and the plurality of fixed contacts is achieved by moving the operating member. The fixed contacts have a conductive part housed within the housing and a plurality of external terminals exposed in the housing. On the bottom surface of the housing, opposite to the operating part, a waterproof platform is provided that covers the roots of the plurality of external terminals and protrudes in the direction away from the operating part along the extending direction of the external terminals.

[0043] Hereinafter, the switching device of the first embodiment will be described with reference to the accompanying drawings.

[0044] Figure 1 The front view of the switching device according to the first embodiment is a front view of the switching device observed when the operating components are in a non-operating state. Hereinafter, Figure 1 The Y-direction, which is the direction in which the operating component extends, is called the vertical direction. Figure 1 The X direction, which is the arrangement direction of the lead-out terminals, is called the left-right direction. The direction perpendicular to the up-down and left-right directions, i.e., the Z direction, is called the depth direction. Furthermore, the up-down, left-right, and depth directions described above are for illustrative purposes only and may differ from the actual directions used.

[0045] like Figure 1 , Figure 2 As shown, the housing 12 is composed of a frame 14 with an opening at the bottom and a base plate 13 that is fastened to the opening at the bottom of the frame 14. The frame 14 protects the operating component 11 and has a guide structure inside that restricts the movement direction of the operating component 11. In addition, a through hole 12a is formed in the center of the upper surface that exposes the operating part 11t of the operating component 11. The base plate 13 is made of an insulating material, such as resin, and is tightly bonded to the frame 14 to prevent water from easily seeping into the interior of the housing 12 from the joint between the base plate 13 and the frame 14.

[0046] The operating component 11 extends along the Y direction and includes an operating part 11t as its upper part, a sleeve 11r that can be fitted onto the operating part 11t, and a mounting part 11k as its lower part, wherein the mounting part 11k is in Figure 1 , Figure 2 The operating part 11t protrudes upward from the frame 14 through the through hole 12a provided on the upper surface of the frame 14 in a state in which the sleeve 11r is fitted.

[0047] Figure 1 Below the housing 12, a waterproof platform 20, an external terminal 15o (part of the fixed terminal 15), and a seal P (indicated by a dashed box) are also shown. The fixed terminal 15 is integrally fixed to the base plate 13 by insert molding. The portion of the fixed terminal 15 protruding from the housing 12 is called the external terminal 15o. The external terminal 15o is a lead terminal that outputs the conducting state of the switching device. The extension direction of the fixed terminal 15 (external terminal 15o) is perpendicular to the plane of the base plate 13. The figure shows a pair of fixed terminals 15, but the number of fixed terminals 15 is not limited to this. The waterproof platform 20 is located near the end of the external terminal 15o that contacts the bottom surface of the housing 12, surrounding the outer periphery of the external terminal 15o. In addition, when the switch device 1 is actually used, it will seal the external terminal 15o below the housing 12 and the wiring connected thereto by thermoplastic molding, so that the lower surface of the housing 12 is in close contact with the sealing element obtained after thermoplastic molding to achieve insulation and waterproofing. The diagram of the sealing element and other components connected to the external terminal 15o is omitted here, and only the position of the sealing element P is schematically shown.

[0048] Figure 3 This is an exploded perspective view showing a part of the switching device, which from top to bottom consists of the operating component 11, the movable contact 16, the reset component 17, and the combination of the fixed contact 15 and the base plate 13.

[0049] like Figure 3 As shown, the operating component 11 consists of an operating part 11t as its upper part, a mounting part 11k as its lower part, and a sleeve 11r. Figure 3 The operating part 11t is separated from the sleeve 11r and configured as two parts, but it is not limited to this. The operating part 11 may also include only the operating part 11t exposed from the housing 12 and the mounting part 11k housed in the housing. The mounting part 11k is formed as a generally horseshoe-shaped recess that can accommodate the movable contact 16. The top surface 16t of the movable contact 16 can be fixed on the inner top surface of the mounting part 11k by riveting or the like.

[0050] The movable contact 16 is a curved, elastic, conductive metal plate consisting of a flat top surface 16t and a pair of opposing elastic wall portions 16a and 16b on both sides.

[0051] A mounting portion 15c for mounting the reset member 17 is formed on the base plate 13 at the middle of the fixed contacts 15 arranged along the X direction and at the position opposite to the reset member 17. The reset member 17 is sandwiched between the mounting portion 13a of the base plate 13 and the top surface 16t of the movable contact 16. When the operating member 11 is pressed, the operating member 11 can be restored to its original position by the compressive force generated by compressing the reset member 17.

[0052] A pair of fixed contacts 15 are rod-shaped conductive metal rods formed on the base plate 13 at positions opposite to a pair of elastic walls of the movable contact 16. Depending on whether they are always connected to the movable contact, the pair of fixed contacts 15 can be divided into a common fixed contact 15a and a switching fixed contact 15b. The common fixed contact 15a is configured to connect to the movable contact earlier than the switching fixed contact 15b. As an example, as shown in FIG4, the top of the common fixed contact 15a can be formed higher than that of the switching fixed contact 15b.

[0053] In the non-pressed state (i.e., when the operating component 11 is not in the operating position), the elastic wall portion 16a of one of the movable contacts 16 is connected to the common fixed contact 15a of the fixed contact 15, and the elastic wall portion 16b of the other movable contact 16 is separated from the switching fixed contact 15b of the fixed contact 15 and is located above the switching fixed contact 15b. At this time, there is no electrical conduction between the pair of fixed contacts.

[0054] In the pressed state (i.e., when the operating component 11 is in the operating position), the elastic wall portion 16a of one of the movable contacts 16 is connected to the common fixed contact 15a of the fixed contact 15, and the elastic wall portion 16b of the other movable contact 16 is also connected to the switching fixed contact 15b of the fixed contact 15. At this time, the pair of fixed contacts are electrically connected.

[0055] Figure 4A It is a three-dimensional diagram showing the combined state of the base plate, waterproof platform, and fixed contacts in a switching device. Figure 4B It is a top view showing the combined state of the base plate, waterproof platform, and fixed contacts in the switching device. Figure 5 It means along Figure 4B A cross-sectional view along line AA. Figure 6 It is a bottom view showing the combined state of the base plate, waterproof platform, and fixed contacts in the switching device.

[0056] like Figure 5 As shown, the fixed contact 15 can be divided into a common fixed contact 15a and a switching fixed contact 15b arranged in the X-axis direction, based on whether it is always connected to the movable contact. It can also be divided along the Y-axis direction, based on whether it is exposed on the outside of the housing, into a conductive portion 15i housed within the housing and external terminals 15o exposed outside the housing. Functionally, the conductive portion 15i is part of the fixed contact that can contact or separate from the movable contact 16 as the operating member 11 reciprocates. The multiple external terminals 15o are part of the fixed contact that output a detection signal indicating the switching of the conduction state to the outside.

[0057] Figure 5In the first embodiment, the lower part of the guide section 15i, which is fixedly connected to the base plate, is provided with multiple serpentine structures and protruding structures. This complex shape is used for insertion molding to achieve a reliable connection between the base plate and the fixed contact. However, it is not limited to the above method. For example, it can be made into a simple shape, and a reliable connection can be achieved by means of welding.

[0058] like Figures 4A to 6 As shown, in the first embodiment, the base plate 13 is formed into a square plate shape when viewed in plan view. On the bottom side of the base plate 13, that is, the side opposite to the side where the operation part 11t is located, a waterproof platform 20 is formed that wraps around the outer periphery of the root rt of the external terminal and protrudes downward in a direction away from the operation part 11t. The root rt refers to the part of the external terminal that protrudes from the base plate 13 and is closer to the base plate 13.

[0059] The waterproof platform 20 includes a stepped portion 20s, an anchor portion 20a, and a blocking portion 20b, each protruding in a direction away from the operating part 11t. The stepped portion 20s consists of... Figure 5 The dashed box in the figure indicates that the step portion 20s is provided on the bottom side of the base plate 13, protruding away from the operating part in a manner that covers the central part of the base plate 13 and wraps around a portion of the root rt of the external terminal 15o. Furthermore, the coverage span of the step portion 20s in the X direction is greater than the distance between the two anchor portions 20a arranged in the X direction. The anchor portion 20a is provided on the bottom side of the step portion 20s, at the location of the plurality of external terminals 15o, and protrudes away from the operating part in a manner that wraps around the outer periphery of each of the plurality of external terminals 15o. In the first embodiment, there are two external terminals 15o, therefore only two anchor portions 20a are provided. However, when there are three or more external terminals, the number of anchor portions 20a can also be three or more, as long as the number of anchor portions 20a corresponds to the number of external terminals 15o.

[0060] The blocking part 20b is provided on the bottom side of the stepped part 20s and located between multiple anchor parts 20a. When there are two anchor parts 20a and they are symmetrically arranged on both sides in the X direction, the blocking part 20b is located approximately in the center of the base plate 13. When there are multiple anchor parts 20a arranged in a polygonal manner, the blocking part 20b only needs to be provided between every pair of anchor parts 20a. Furthermore, in Figure 5In this arrangement, the ends of the anchor portions 20a and 20b furthest from the step portion 20s (shown as the lower ends in the figure) are spaced apart in the X direction. The ends of the anchor portions 20a and 20b closest to the step portion 20s are shown as connected in the X direction, but they may not be connected. Recesses are formed between each anchor portion 20a and between each anchor portion 20a and the block portion 20b, extending from their respective bottom surfaces towards the bottom surface of the housing 12. The anchor portions 20a and the block portions 20b are not formed on the same flat plane, thereby increasing the surface distance between the external terminals 15o. Furthermore, Figure 5 The anchor portion 20a shown is formed in such a way that its outer side surface is on the same plane as the outer side surface of the step portion 20s, but the outer side surface of the anchor portion 20a may not be on the same plane as the outer side surface of the step portion 20s.

[0061] Furthermore, the step portion 20s, anchor portion 20a, and blocking portion 20b all have bottom surfaces parallel to the base plate 13, wherein the bottom surface area of ​​the base plate 13 is larger than the bottom surface area of ​​the step portion 20s, and the bottom surface area of ​​the step portion 20s is larger than the bottom surface areas of the anchor portion 20a and the blocking portion 20b. By forming multiple parallel bottom surfaces, the contact area between the seal P and each bottom surface can be increased, thereby increasing the bonding strength of the seal P. In addition, forming the base plate 13, step portion 20s, anchor portion 20a, and blocking portion 20b with resin material can also increase the bonding strength between each component and the seal P. Furthermore, although the bottom surfaces of each of the step portion 20s, anchor portion 20a, and blocking portion 20b are all formed into rectangles in the first embodiment, their shapes are not limited to this and can be other shapes.

[0062] By providing a waterproof platform of a certain thickness at the lower part of the base plate 13 in a manner that wraps around the external terminal 15o as described above, even if water seeps in from the gap between the lower surface of the base plate 13 and the seal P, the possibility of water contacting the external terminal 15o is reduced because the water penetration path is longer. Even if contact occurs, the contact range can be reduced, thereby reducing the possibility of a short circuit between the two external terminals.

[0063] Furthermore, a waterproof platform of a certain thickness can be designed as a multi-segment structure with uneven width. In the first embodiment, the anchor portion 20a and the blocking portion 20b are designed as a multi-segment structure, such as a sandwich. For example, Figure 5As shown, in the extending direction of the external terminal, the anchor portion 20a and the blocking portion 20b are formed as a necked structure with the width at the top and bottom ends greater than the width at the center. Furthermore, although not shown, in a plane parallel to the bottom surface of the housing 12 (or the bottom surface of the base plate 13 in the first embodiment), the cross-sectional area of ​​the end segments of the anchor portion 20a and the blocking portion 20b is smaller than the cross-sectional area of ​​the middle segment. The three-segment structure of the anchor portion 20a and the blocking portion 20b listed above is merely one example; other multi-segment structures are also possible.

[0064] By adopting the above structure, the surface distance of water moving on the resin material surface can be further increased. In other words, when water is connected between the two external terminals 15o, a short circuit will occur between the two external terminals. Increasing the surface distance of water moving on the resin material surface can reduce the possibility of a short circuit. Furthermore, since the anchor portion 20a and the blocking portion 20b with a necking structure are formed, the bonding strength between the anchor portion 20a and the blocking portion 20b and the seal P is increased, making water penetration more difficult. Alternatively, only the anchor portion 20a can be provided, omitting the blocking portion 20b.

[0065] Furthermore, in the first embodiment, the base plate 13 and the waterproof platform 20 are made of the same resin material, and are integrally formed using a single mold. For example, the fixed contact 15 is fixed to the base plate 13 and the waterproof platform 20 by curing the resin material while the fixed contact 15 is inserted into the mold. This ensures that there is no gap between the external terminal 15o of the fixed contact 15 and the waterproof platform 20, preventing water from easily penetrating the interior of the switching device even if water seeps in from the bottom side of the housing 12. Additionally, by using a resin material to form the base plate 13 and the waterproof platform 20, a greater bonding force can be generated when joining with the thermoplastic seal P compared to using a metal material.

[0066] Additionally, as shown in Figure 4, a guide portion GD for guiding water flow can be provided on the waterproof platform 20 at a position approximately along the extension path of the external terminal 15o. The guide portion GD can be one or more grooves. Furthermore, the guide portion GD can also be provided on a portion of the bottom of the housing 12. For example, a first groove can be formed on a portion of the bottom of the housing 12 (the bottom of the base plate 13 in the first embodiment), and a second groove can be formed on a portion of the waterproof platform 20, such that the second groove and the first groove are approximately located along the extension path of the external terminal. In this case, even if water seeps in from the gap between the bottom surface of the housing 12 and the seal P, it easily flows downwards along the extension direction of the external terminal 15o, reducing the possibility of forming a short-circuit path in the arrangement direction of the two external terminals 15o.

[0067] (First variation)

[0068] Figure 7 This is a schematic diagram of a switching device in a first variation of the first embodiment.

[0069] The difference between the first modified example and the first embodiment is that the waterproof platform 20 is composed of an anchor portion 20a' and a blocking portion 20b', and the step portion is not provided in the first modified example. Other than this, the configuration is the same as in the first embodiment, and some details are omitted.

[0070] According to the structure of the first modified example, since a waterproof platform (anchor 20a' and blocking part 20b') of a certain thickness is also provided on the lower part of the base plate 13 in a manner that wraps around the outer terminal 15o, the anchor 20a' is provided on the base plate 13 in a manner that surrounds the outer periphery of the outer terminal 15o at the location of the outer terminal 15o, and the blocking part 20b' is located between multiple anchors 20a'. The anchors 20a' and the blocking parts 20b' are arranged at intervals in the X direction, so that even if water seeps in from the gap between the lower surface of the base plate 13 and the seal P, the possibility of water contacting the outer terminal 15o is reduced because the water penetration path is longer. Even if contact occurs, the contact range can be reduced, thereby reducing the possibility of short circuit between the two outer terminals 15o.

[0071] Furthermore, both the anchor portion 20a' and the blocking portion 20b' are formed as multi-segment structures, such as a sandwich. In a plane direction parallel to the bottom surface of the shell (the bottom surface of the base plate in the first embodiment), the cross-sectional area of ​​the two end segments of the anchor portion 20a' and the blocking portion 20b' is smaller than the cross-sectional area of ​​the middle segment.

[0072] By adopting the above structure, the surface distance of water moving on the resin material surface can be further increased. Furthermore, since the anchor portion 20a' and the blocking portion 20b' with their necking structures are formed, the bonding strength between the anchor portion 20a' and the blocking portion 20b' and the seal P is increased, making water penetration more difficult. Similarly, in this modified example, only the anchor portion 20a' can be provided, while the blocking portion 20b' can be omitted.

[0073] (Second variation)

[0074] Figure 8 This is a schematic diagram of a switching device in a second variation of the first embodiment.

[0075] In the first embodiment and the first variation, it was described that the housing 12 is composed of a frame 14 with an opening at the bottom and a base plate 13 that is fastened to the opening. However, in the second variation, as shown in FIG9, the housing 12' can also be composed of a frame 30 with an opening at the top and a cover plate 40 that is fastened to the opening 30. The cover plate 40 is provided with a through hole for the operating component 11 to extend out. In the second variation, the frame 30 and the waterproof platform 20 are made of the same resin material. The frame 30 and the waterproof platform 20 are integrally formed using a mold. The resin material is cured while the fixing contact 15 is inserted into the mold to fix the fixing contact 15 to the frame 30 and the waterproof platform 20. As a result, there is no gap between the external terminal 15o of the fixing contact 15 and the frame 30 and the waterproof platform 20. Even if water is immersed from the bottom side of the housing 12 (the bottom side of the frame 30), water is not easily immersed into the interior of the switching device.

[0076] Apart from the above, the second modification is generally the same as the first embodiment. Regarding the waterproof platform 20, the second modification can adopt either the same structure as the first embodiment or the same structure as the first modification, so that the second modification can achieve the same effect as the first embodiment or the first modification.

[0077] (Third variation)

[0078] Figure 9A , Figure 9B This is a perspective view of the switching device of the third variation of the first embodiment. Figure 9A This indicates that three parallel switching devices are connected to the wiring board respectively. Figure 9B This indicates that a sealing element is formed on the outside of the switching device and wiring board by thermoplastic molding.

[0079] The following example illustrates one application scenario of the switching device. The structure and effect of the switching device can be the same as any of the first embodiment, the first modification of the first embodiment, and the second modification of the first embodiment. In the third modification, three switching devices 1 are connected in parallel as detectors to detect three states of the car door (not in contact, in contact, and open). Each switching device corresponds to one car door state. The external terminal 15o of each switching device 1 outputs a detection signal indicating the switching of the conduction state to the outside via a common wiring board B, thereby enabling the detection of changes in the three states of the car door. In addition, to ensure the insulation and waterproofness of the external terminal 15o, the waterproof platform 20, the external terminal 15o, and the common wiring board B are wrapped by a thermoplastic sealant P, and the upper surface of the sealant P is tightly bonded to the bottom surface of the housing.

[0080] The above describes the use of independent switching devices in combination, but it is also possible to design three switching devices connected in parallel as a single switching module.

[0081] This refers to a switch module containing three switch devices arranged in parallel. The external terminals of each switch device output a detection signal indicating the switching of the conduction state to the outside via a shared wiring substrate. The waterproof platform, external terminals, and shared wiring substrate are encased in a thermoplastic seal.

[0082] While several embodiments of this utility model have been described above, these embodiments are provided as examples and are not intended to limit the scope of the utility model. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the utility model. These embodiments and their variations are included in the scope and spirit of the utility model, and are also included in the scope of the utility model and its equivalents as described in the claims.

Claims

1. A switching device comprising: an operating member having an operating portion for performing a push-in operation and a mounting portion for mounting a movable contact; a housing housing the mounting portion of the operating member and having a through hole exposing the operating portion of the operating member in the housing; a reset member for returning the operating member to its original position; a plurality of fixed contacts fixed within the housing; and a movable contact disposed in the mounting portion of the operating member; wherein a switching of a conductive state between the movable contact and the plurality of fixed contacts is realized by moving the operating member, characterized in that... The fixed contact has a conductive portion housed within the housing and multiple external terminals exposed within the housing. On the bottom side of the housing, opposite to the operating part, there is a waterproof platform that covers the roots of the plurality of external terminals and protrudes away from the operating part along the extending direction of the external terminals.

2. The switching device according to claim 1, characterized in that, The waterproof platform has the following features: Multiple anchor portions, on the bottom side of the housing, at the location of the multiple external terminals, protrude toward the direction away from the operating portion in a manner that wraps around the outer periphery of each of the multiple external terminals.

3. The switching device according to claim 1, characterized in that, The waterproof platform has the following features: The stepped portion protrudes away from the operating portion on the bottom side of the housing in such a way that it covers the central portion of the outer bottom surface of the housing and wraps around the root of the external terminal; as well as Multiple anchor portions protrude from the stepped portion toward the direction away from the operating portion at the location of the multiple external terminals in a manner that wraps around the outer periphery of each of the multiple external terminals.

4. The switching device according to claim 2, characterized in that, The waterproof platform also has a blocking portion disposed between the plurality of anchor portions, the blocking portion protruding along the extension direction of the external terminal toward a direction away from the operating portion.

5. The switching device according to claim 3, characterized in that, The waterproof platform also has a blocking portion disposed between the plurality of anchor portions, the blocking portion protruding along the extension direction of the external terminal toward a direction away from the operating portion.

6. The switching device according to claim 2 or 3, characterized in that, The anchor portion has multiple segments formed in the extension direction of the external terminal, and in a plane direction parallel to the bottom surface of the housing, the anchor portion has a middle segment with a cross-sectional area smaller than that of the two end segments.

7. The switching device according to claim 4 or 5, characterized in that, The blocking portion has multiple segments formed in the extension direction of the external terminal, and in a plane direction parallel to the bottom surface of the housing, the blocking portion has a middle segment with a cross-sectional area smaller than that of the two end segments.

8. The switching device as claimed in claim 5, characterized in that, The bottom area of ​​the shell is larger than the bottom area of ​​the step portion, and the bottom area of ​​the step portion is larger than the bottom areas of the anchor portion and the blocking portion.

9. The switching device according to any one of claims 1 to 3, characterized in that, The housing consists of a frame with an opening at the bottom and a base plate that snaps into the opening. The plurality of fixing points are integrally fixed to the base plate by insert molding. The base plate and the waterproof platform are made of the same resin material.

10. The switching device according to any one of claims 1 to 3, characterized in that, The housing consists of a frame with an opening at the top and a cover plate that snaps into the opening. The plurality of fixing points are integrally fixed to the frame by insert molding. The frame and the waterproof platform are made of the same resin material.

11. The switching device according to any one of claims 1 to 3, characterized in that, The three switching devices are arranged in parallel. The external terminals of each switching device output a detection signal indicating the switching of the conduction state to the outside via a common wiring board. The waterproof platform, the external terminals and the common wiring board are wrapped by a thermoplastic seal.

12. A switching module, characterized in that, It has three switching devices arranged in parallel according to any one of claims 1 to 3. Each switching device's external terminal outputs a detection signal indicating the switching of the conduction state to the outside via a shared wiring board. The waterproof platform, the external terminal, and the shared wiring board are encased in a thermoplastic seal.

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