JP6789181B2 - Switch device - Google Patents

Description

The present disclosure relates to a switch device.

In the internal space of the housing, the tip of a cantilever-shaped leaf spring (movable contact) protruding from one side surface toward the other contacts a contact (fixed contact) arranged at an opposite position on the other side surface. A switch device having a B-contact (normally closed) structure is known.

Jitsukaisho 58-8813 Gazette Jitsukaisho 63-159225

However, in the conventional technique as described above, when each metal member forming the movable contact and the fixed contact is integrated with the resin portion, the thickness of the resin portion is reduced and the movable contact and the fixed contact are separated from each other. It is difficult to secure a relatively high contact pressure. When the contact pressure between the movable contact and the fixed contact is increased, the contact stability at the time of closing is improved, but the force applied to the resin portion due to the reaction force is increased. Such an increase in the force applied to the resin portion becomes an obstacle in reducing the thickness of the resin portion.

Therefore, on one side, it is an object of the present invention to secure a relatively high contact pressure between the movable contact and the fixed contact while reducing the thickness of the resin portion.

On one side, it is a normally closed type switch device that includes a first metal member and a second metal member.
The first connection terminal formed on the first metal member and
A second connection terminal formed on the second metal member and separated from the first connection terminal in the first direction,
A first metal member formed on the first metal member, extending like a cantilever in the first direction toward the second base of the second connection terminal, having elasticity, and perpendicular to the first direction. A movable contact that can be pushed down to the first side in two directions,
The movable by being formed on the second metal member, extending in the first direction toward the first base portion of the first connection terminal, and contacting the tip end portion of the movable contact in the second direction. Fixed contacts that hold the contacts in an elastically deformed state,
A resin portion that includes a part of the first metal member including the first base portion and a part of the second metal member including the second base portion in a manner in which the movable contact and the fixed contact are exposed. ,
The extension range of the movable contact in the first direction and the extension range of the fixed contact in the first direction formed on at least one of the first metal member and the second metal member. A switch device is provided that includes a reinforcing portion that extends in the first direction and is included in the resin portion within a range that overlaps with at least one of them.

On one side, according to the present invention, it is possible to secure a relatively high contact pressure between the movable contact and the fixed contact while reducing the thickness of the resin portion.

It is a perspective view which shows the switch device 1 by one Example. It is an exploded perspective view of the switch device 1. It is a side view of the switch device 1. It is a schematic diagram which shows the relationship between a movable contact 20 and a fixed contact 30 in a closed state. It is a schematic diagram which shows the relationship between a movable contact 20 and a fixed contact 30 in an open state. It is a perspective view of the 1st metal member 100. It is a perspective view of the 2nd metal member 200. It is explanatory drawing of the resin breakage suppression function. It is explanatory drawing of the resin breakage suppression function. It is a figure which shows each state in the process of manufacturing of a switch device 1.

Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a switch device 1 according to an embodiment. FIG. 2 is an exploded perspective view of the switch device 1. FIG. 3 is a side view of the switch device 1.

In FIG. 1, three orthogonal axes X, Y, and Z are defined. Further, on the Z axis and the like, each side is indicated by Z1 and Z2. The Z direction (an example of the second direction) corresponds to the thickness direction of the switch device 1, and in the following description, the Z1 side is referred to as "upper side". In FIG. 2, projection 3 is shown fluoroscopically.

The switch device 1 includes a first connection terminal 11 and a second connection terminal 12. The switch device 1 is a normally closed type, and the first connection terminal 11 and the second connection terminal 12 are normally conducting. The first connection terminal 11 and the second connection terminal 12 are electrically connected to an external circuit (not shown). For example, the switch device 1 is mounted on a board, and the first connection terminal 11 and the second connection terminal 12 are each electrically connected to the wiring on the board.

As shown in FIG. 2, the switch device 1 includes a first metal member 100 and a second metal member 200.

The first metal member 100 is, for example, a sheet metal member. The first metal member 100 is formed with a first connection terminal 11, a movable contact 20, and a first reinforcing portion 50 (see FIG. 5) described later.

The movable contact 20 extends from the first connection terminal 11 in the X direction (an example of the first direction) in a cantilever shape. The movable contact 20 extends to the side (X2 side) of the second connection terminal 12 toward the second base portion 12a (see FIGS. 6 and 7A). In addition, "extending in the X direction" does not necessarily mean extending in parallel with the X direction, and includes a mode in which the components extend in the X direction while having components in the Z direction and the Y direction. The second base portion 12a of the second connection terminal 12 refers to a portion related to the root of the second connection terminal 12 and covered with the resin portion 40.

The movable contact 20 has elasticity and is movable with respect to the first connection terminal 11 by elastically deforming. The movable contact 20 has a relatively long length in the X direction and therefore has significant elasticity. The movable contact 20 can be pushed down to the lower side (an example of the first side). In the elastically deformed state of the movable contact 20, the tip end (free end) abuts on the lower surface of the fixed contact 30 in the Z direction. In this way, the movable contact 20 is held in an elastically deformed state in such a manner that the displacement to the upper side is restrained by the fixed contact 30.

The second metal member 200 is, for example, a sheet metal member. The second metal member 200 is formed with a second connection terminal 12, a fixed contact 30, and a second reinforcing portion 60 (see FIG. 5) described later.

The fixed contact 30 extends from the second connection terminal 12 toward the first base portion 11a (see FIGS. 5 and 7A) of the first connection terminal 11 in the X direction. The fixed contact 30 has a relatively short length in the X direction and therefore does not have significant elasticity. As described above, the fixed contact 30 abuts the tip of the movable contact 20 in the Z direction to hold the movable contact 20 in an elastically deformed state. The first base portion 11a of the first connection terminal 11 refers to a portion related to the root of the first connection terminal 11 and covered with the resin portion 40.

As shown in FIG. 2, the switch device 1 includes a resin portion 40 that integrates the first metal member 100 and the second metal member 200.

In the resin portion 40, a part including the first base portion 11a of the first metal member 100 and a part including the second base portion 12a of the second metal member 200 are made of a resin material in such a manner that the movable contact 20 and the fixed contact 30 are exposed. Include. The portion of the first metal member 100 included in the resin portion 40 includes the first base portion 11a, the portion between the first base portion 11a of the first connection terminal 11 and the movable contact 20 in the X direction, and the first portion described later. The reinforcing portion 50 is included. The portion of the second metal member 200 included in the resin portion 40 includes the second base portion 12a, the portion between the second base portion 12a of the second connection terminal 12 and the fixed contact 30 in the X direction, and the second portion described later. The reinforcing portion 60 is included.

A part of the first metal member 100 and a part of the second metal member 200 included in the resin portion 40 are electrically insulated from each other. That is, the resin portion 40 is the first while maintaining the electrical insulation between the first metal member 100 and the second metal member 200 (electrical insulation other than between the movable contact 20 and the fixed contact 30). The metal member 100 and the second metal member 200 are integrated.

The resin portion 40 forms a cavity 41 penetrating in the Z direction in the central portion in a top view (view in the Z direction). A movable contact 20 extends and a fixed contact 30 is arranged in the cavity 41. In other words, the resin portion 40 is formed so as to surround the movable contact 20 and the fixed contact 30 in a top view. In this way, since the resin portion 40 has the cavity 41 (that is, by opening in the vertical direction), the thickness of the resin portion 40 and the switch accordingly are compared with the case where the upper and lower parts of the switch device are covered with resin. The thickness of the device 1 can be reduced. That is, the thickness can be reduced by the wall thickness of the upper part and the lower part as compared with the case where the upper part and the lower part of the switch device are covered with the resin.

As shown in FIG. 2, the switch device 1 further includes a top film 2 (an example of a film member), a projection 3, and a bottom film 4.

The top film 2 closes the cavity 41 on the upper side of the resin portion 40. That is, the top film 2 seals the upper side of the cavity 41. As a result, while maintaining the thinness of the switch device 1, foreign matter does not enter the contact position between the fixed contact 30 and the movable contact 20, and the electrical connection becomes more stable. The top film 2 may have a shape in which the periphery thereof bulges slightly upward with the portion where the projection 3 is provided as a center.

The projection 3 is provided on the lower surface of the top film 2. As a result, the movable contact 20 can be reliably pressed via the projection 3, and the electrical connection state between the movable contact 20 and the fixed contact 30 can be switched more reliably. In addition, it is possible to suppress a change in feel due to misalignment during assembly, and it is possible to ensure stable operability even when pushed at the end or diagonally.

The bottom film 4 closes the cavity 41 under the resin portion 40. That is, the bottom film 4 seals the lower side of the cavity 41. As a result, while maintaining the thinness of the switch device 1, foreign matter does not enter the contact position between the fixed contact 30 and the movable contact 20, and the electrical connection becomes more stable.

FIG. 4A is a schematic view showing the relationship between the movable contact 20 and the fixed contact 30 in the closed state of the switch device 1. FIG. 4B is a schematic view showing the relationship between the movable contact 20 and the fixed contact 30 in the open state of the switch device 1. 4A and 4B show the relationship between the movable contact 20 and the fixed contact 30 very schematically in a side view of the switch device 1.

In the closed state, as described above, the fixed contact 30 holds the movable contact 20 in an elastically deformed state. Therefore, as shown in FIG. 4A, the movable contact 20 presses the fixed contact 30 with the elastic force F2, and the elastic force F2 determines the contact pressure between the movable contact 20 and the fixed contact 30. Increasing the elastic force F2 is effective from the viewpoint of increasing the contact stability at the time of closing. For example, the elastic force F2 may be set to about 0.5N.

In the open state, as shown in FIG. 4B, the movable contact 20 separates downward from the fixed contact 30. The open state is realized by the downward pushing force F1 by the user. That is, when the user pushes down the movable contact 20, the pushing force F1 overcomes the elastic force F2, so that the movable contact 20 is pushed down. As a result, the electrical connection state between the movable contact 20 and the fixed contact 30 is released, and the state is opened.

Next, the first reinforcing portion 50 and the second reinforcing portion 60 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view of the first metal member 100. FIG. 6 is a perspective view of the second metal member 200.

The first reinforcing portion 50 and the second reinforcing portion 60 extend in a range that overlaps with at least one of the extending range of the movable contact 20 in the X direction and the extending range of the fixed contact 30 in the X direction. Moreover, by being included in the resin portion 40, it has a function of suppressing damage such as cracking of the resin portion 40 (hereinafter, referred to as "resin damage suppressing function") as described later. It should be noted that extending in the range overlapping with at least one of the extending range of the movable contact 20 in the X direction and the extending range of the fixed contact 30 in the X direction is the base of the movable contact 20 in the X direction. It is equivalent to extending in the area between the (root) and the base (root) of the second connection terminal 12. As will be described later, the first reinforcing portion 50 and the second reinforcing portion 60 do not necessarily cover the entire area between the base (root) of the movable contact 20 and the base (root) of the second connection terminal 12 in the X direction. It does not have to be extended, and may be a partially extended mode.

Specifically, as shown in FIG. 5, the first reinforcing portion 50 extends in the X direction from the first connection terminal 11 in a cantilever shape. Like the movable contact 20, the first reinforcing portion 50 extends toward the fixed contact 30. The first reinforcing portion 50 preferably extends to the vicinity of the fixed contact 30 (up to the root of the second reinforcing portion 60) in order to enhance the resin breakage suppressing function, as shown in FIG. Further, the first reinforcing portion 50 is preferably provided on both sides in the Y direction in order to maintain the balance of the resin breakage suppressing function in the Y direction, as shown in FIG. That is, the first reinforcing portions 50 are provided on both sides of the movable contact 20 in the Y direction in a paired manner.

In the example shown in FIG. 5, the first reinforcing portion 50 extends at the same height as the movable contact 20. That is, the first metal member 100 is bent upward from the first connection terminal 11, and the first reinforcing portion 50 and the movable contact 20 extend above the first connection terminal 11.

As shown in FIG. 6, the second reinforcing portion 60 extends in the X direction from the second connecting terminal 12 in the shape of a cantilever. The second reinforcing portion 60 extends toward the movable contact 20. The second reinforcing portion 60 preferably extends to the root of the first reinforcing portion 50 in order to enhance the resin breakage suppressing function, as shown in FIG. Further, the second reinforcing portion 60 is preferably provided on both sides in the Y direction in order to maintain the balance of the resin breakage suppressing function in the Y direction, as shown in FIG. That is, the second reinforcing portions 60 are provided on both sides of the movable contact 20 in the Y direction in a paired manner.

The second reinforcing portion 60 is preferably positioned at the same position as the first reinforcing portion 50 in the Y direction in order to enhance the resin breakage suppressing function. That is, the second reinforcing portions 60 are preferably overlapped in a top view in order to enhance the resin breakage suppressing function. The second reinforcing portion 60 may be formed with the same width (width in the Y direction) as the first reinforcing portion 50. The second reinforcing portion 60 extends below the first reinforcing portion 50.

Next, the resin damage suppressing function by the first reinforcing portion 50 and the second reinforcing portion 60 will be described with reference to FIGS. 7A and 7B.

FIG. 7A shows a cross section in the Y direction passing through the movable contact 20 in the closed state, and the first reinforcing portion 50 and the second reinforcing portion 60 are shown in perspective. FIG. 7B shows a cross section in the Y direction passing through the first reinforcing portion 50 and the second reinforcing portion 60 in the closed state, and the movable contact 20 is shown perspectively.

As shown in FIG. 7A, in the closed state, as described above, the fixed contact 30 holds the movable contact 20 in an elastically deformed state. Therefore, as shown in FIG. 7A, the movable contact 20 presses the fixed contact 30 with the elastic force F2. As a result, the fixed contact 30 presses the resin portion 40 upward as shown by the force F3 in FIG. 7A. Further, the movable contact 20 presses the resin portion 40 downward as shown by the force F4 in FIG. 7A. Such forces F3 and F4 can cause damage such as cracking of the resin portion 40.

In this regard, according to the present embodiment, as shown in FIG. 7B, since the first reinforcing portion 50 and the second reinforcing portion 60 are provided, the forces F3 and F4 are offset, and the resin portion 40 is damaged such as cracks. Can be suppressed. Specifically, as schematically shown in FIG. 7B, the first reinforcing portion 50 can apply a force F5 corresponding to the force F4 downward to the vicinity of the fixed contact 30 in the resin portion 40. As a result, the total force applied to the resin portion 40 near the fixed contact 30 in the resin portion 40 is reduced, and damage such as cracking of the resin portion 40 can be suppressed. Similarly, as schematically shown in FIG. 7B, the second reinforcing portion 60 can apply a force F6 corresponding to the force F3 upward near the root of the movable contact 20 in the resin portion 40. That is, when viewed in a plan view from above, the first reinforcing portion 50 and the second reinforcing portion 60 overlap each other, and the first reinforcing portion 50 is arranged above the second reinforcing portion 60, so that the first reinforcing portion 50 is arranged. The second reinforcing portion 60 arranged below receives the force F5 which is the downward force acting on the 50, and the first reinforcing portion 50 arranged above receives the force F6 which is the upward force acting on the second reinforcing portion 60. It has a structure to receive. As a result, the total force applied to the resin portion 40 near the root of the movable contact 20 in the resin portion 40 is reduced, and damage such as cracking of the resin portion 40 can be suppressed.

Next, the manufacturing method of the switch device 1 will be outlined with reference to FIG.

FIG. 8 is a diagram schematically showing each state during manufacturing of the switch device 1. In FIG. 8, the manufacturing process proceeds along the arrow.

As shown in FIG. 8, first, as shown in the first step, the second metal member 200 is press-molded, and then, as shown in the second step, the second metal member 200 is insert-molded. 2 The first resin portion 401 is formed around the metal member 200 except for a part. Here, a member in which the second metal member 200 and the first resin portion 401 are integrated is called a primary molding member. The first resin portion 401 is formed in such a manner that most of the second reinforcing portion 60 is included and the fixed contact 30 is exposed. Next, as shown in the third step, the first metal member 100 is set on the first resin portion 401. At this time, the first reinforcing portion 50 is placed and set on the first resin portion 401 at a position corresponding to the second reinforcing portion 60 so that the first reinforcing portion 50 and the second reinforcing portion 60 overlap each other. Has been done. As a result, the first resin portion 401 has a function of determining the positional relationship between the first metal member 100 and the second metal member 200 so that the first reinforcing portion 50 and the second reinforcing portion 60 do not come into contact with each other. Fulfill. The tip of the movable contact 20 is placed on the upper side of the fixed contact 30. Next, as shown in the fourth step, the second resin portion 402 is formed around the first metal member 100 by insert molding the first metal member 100 and the primary molding member. At this time, the first metal member 100, the second resin portion 402, and the primary molding member are integrated. The second resin portion 402 is formed in such a manner that the first reinforcing portion 50 is included, the exposed portion of the second reinforcing portion 60 is included, and the movable contact 20 is exposed. Since the second resin portion 402 is also formed in the exposed portion of the second reinforcing portion 60, the joint area between the first resin portion 401 and the second resin portion 402 is increased, and the first resin portion 401 and the first resin portion 401 are formed. 2 The bond with the resin portion 402 becomes strong. Next, as shown in the fifth step, the movable contact 20 is fitted below the fixed contact 30. After that, although not shown, the top film 2 and the like are attached to complete the switch device 1.

When the resin portion is formed around the first metal member 100 and the second metal member 200 by one insert molding, the first reinforcing portion 50 and the second reinforcing portion 60 move due to the pressure of the flowing molded resin material. In the worst case, there is a possibility that the first reinforcing portion 50 and the second reinforcing portion 60 are formed in contact with each other.

In the above manufacturing process, after the primary molding member is formed, the first metal member 100 is insert-molded together with the primary molding member, so that the first reinforcing portion 50 and the second reinforcing portion 60 are in contact with each other. It will not be molded.

Although each embodiment has been described in detail above, the present invention is not limited to a specific embodiment, and various modifications and changes can be made within the scope of the claims. It is also possible to combine all or a plurality of the components of the above-described embodiment.

For example, in the above-described embodiment, as a preferred example, the first reinforcing portion 50 and the second reinforcing portion 60 are provided in pairs on both sides in the Y direction, but may be provided only on one side in the Y direction. Further, only one of the first reinforcing portion 50 and the second reinforcing portion 60 may be provided. Further, the first reinforcing portion 50 and the second reinforcing portion 60 extend to the vicinity of the roots of each other as a preferable example, but may have a length significantly shorter than such a length.

Further, in the above-described embodiment, the first connection terminal 11 and the second connection terminal 12 are exposed in the X direction from the resin portion 40 on both sides of the resin portion 40 in the X direction, but the present invention is not limited to this. For example, the first connection terminal 11 and the second connection terminal 12 may be exposed from the resin portion 40 in the Y direction on both sides of the resin portion 40 in the X direction.

1 Switch device 2 Top film 3 Projection 4 Bottom film 11 1st connection terminal 12 2nd connection terminal 20 Movable contact 30 Fixed contact 40 Resin part 41 Cavity 50 1st reinforcing part 60 2nd reinforcing part 100 1st metal member 200 2nd Metal member 401 1st resin part 402 2nd resin part

Claims (7)

A normally closed type switch device including a first metal member and a second metal member.
The first connection terminal formed on the first metal member and
A second connection terminal formed on the second metal member and separated from the first connection terminal in the first direction,
A first metal member formed on the first metal member, extending like a cantilever in the first direction toward the second base of the second connection terminal, having elasticity, and perpendicular to the first direction. A movable contact that can be pushed down to the first side in two directions,
The movable by being formed on the second metal member, extending in the first direction toward the first base portion of the first connection terminal, and contacting the tip end portion of the movable contact in the second direction. Fixed contacts that hold the contacts in an elastically deformed state,
A resin portion that includes a part of the first metal member including the first base portion and a part of the second metal member including the second base portion in a manner in which the movable contact and the fixed contact are exposed. ,
The extension range of the movable contact in the first direction and the extension range of the fixed contact in the first direction formed on at least one of the first metal member and the second metal member. A switch device including a reinforcing portion extending in the first direction and included in the resin portion within a range overlapping with at least one of them. The reinforcing portion includes a first reinforcing portion formed on the first metal member and extending like a cantilever in the first direction toward the second base portion of the second connection terminal, and the second reinforcing portion. It is formed on a metal member and extends from the first reinforcing portion to the first side in the second direction and in a cantilever shape toward the first base portion of the first connection terminal in the first direction. Including the second reinforcing part
The switch device according to claim 1, wherein the first reinforcing portion and the second reinforcing portion overlap at least a part when viewed in the second direction. The second reinforcing portion according to claim 2, wherein the first reinforcing portion and the second reinforcing portion are provided in pairs, respectively, in a mode in which the movable contact is sandwiched in a third direction perpendicular to both the first direction and the second direction. Switch device. The first reinforcing portion extends to the root portion of the second reinforcing portion.
The switch device according to claim 2 or 3, wherein the second reinforcing portion extends to the root portion of the first reinforcing portion. The invention according to any one of claims 1 to 4, wherein the resin portion forms a cavity in the central portion when viewed in the second direction, which penetrates in the second direction and extends the movable contact. Switch device. The switch device according to claim 5, further comprising a film member provided on the second side of the resin portion opposite to the first side in the second direction and closing the cavity. The switch device according to claim 6, further comprising a projection provided between the film member and the movable contact in the second direction.

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