JP2013026092A - Switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch device with a pre-sense function, in which a first contact is connected by a slight pressing operation and then a second contact is connected by a pressing operation with a clear feeling.SOLUTION: The switch device has a case 1 having a first stationary contact 1b, a second stationary contact 1c and a third stationary contact 1d, a movable contact 3 having a dome part 3a making an inverse operation, and an elastic body 2 arranged under the movable contact 3. When the switch device is slightly press-operated, the elastic body 2 arranged under the movable contact 3 is elastically deformed, and therefore, a leg part 3b of the movable contact 3 comes into contact with the first stationary contact 1b and the second stationary contact 1c and is electrically connected to connect the first contact. When the switch device is further press-operated, the dome part 3a of the movable contact 3 is reversed to generate a click feeling, and the dome part 3a comes into contact with the third stationary contact 1d to connect the second contact.

Description

  The present invention relates to a pressing operation type switch device used as an input means of various electronic devices, and more particularly, the first contact is connected with a very small amount of pressing, and then the second contact with a clear pressing operation. Relates to a switch device with pre-sense connected.

  Conventionally, there have been proposed various small switch devices configured such that when a dome-shaped movable contact is pressed, the movable contact is reversed with a click feeling and is electrically connected to a fixed contact.

  In such a switch device, the center fixed contact and the outer fixed contact are usually arranged apart from each other on the inner bottom of the case, and the dome-shaped movable contact faces the center fixed contact with the center fixed contact. The peripheral portion is mounted on the inner bottom portion of the housing in a state where the peripheral portion is always in contact with the outer fixed contact. When the central portion of the movable contact is pressed, the movable contact is reversed, the central fixed contact and the outer fixed contact are conducted through the movable contact, and a click feeling is generated by the reversing operation of the movable contact. It is like that.

  This type of switch device is used in various applications as an input means for electronic equipment. However, in some applications, the first contact is connected when the switch device is touched, and then the switch device is pressed to press the switch device. A switch device to which two contacts are connected is required. Hereinafter, a switch device that performs such an operation is referred to as a switch device with pre-sense.

The switch device with a sense is used for various operation switches of an automobile center console, a remote control switch for a visually impaired person, and the like.
In such an application, since the operator operates the device without recognizing the display on the operation surface of the device, the first contact is connected when the operator touches the switch lightly. It is considered that an operation method in which the function is read out to the operator by, for example, a method such as a voice, and the operator can press the switch to perform the intended operation when it is confirmed that the key is intended for the operation is effective.

  In order to realize the operation method as described above, in the switch device with a sense, it is required that the first contact is connected by a very slight pressing operation, and then the second contact is connected by a clear pressing operation. . As a switch device that performs such an operation, for example, a switch device described in Patent Document 1 is known.

  As shown in FIG. 11, the conventional switch device described in Patent Document 1 has first contact patterns 102a and 102b and second contact patterns 103a and 103b formed on a substrate 101. A first ring-shaped rubber 104 is enclosed and mounted on the substrate 101, and a first dome-shaped rubber 105 whose upper end is released integrally with the first ring-shaped rubber 104 is projected, and the first dome-shaped rubber 105 is A two-ring rubber 106 is attached, a second dome-shaped rubber 107 is projected from the second ring-shaped rubber 106, and an operation button 108 is projected integrally from the ceiling wall of the second dome-shaped rubber 107. The first movable contact 109 is attached to the bottom surface of the second ring-shaped rubber 106, and the second movable contact 110 is attached to the ceiling surface of the second dome-shaped rubber 107.

When the operation button 108 is pressed by applying an external force, the first dome-shaped rubber 105 is first folded back so that the first movable contact 109 comes into contact with the first contact patterns 102a and 102b, and then the second dome-shaped rubber 107 is moved. The second movable contact 110 is folded and comes into contact with the second contact patterns 103a and 103b.
Thus, the operation stroke is increased to facilitate identification of the two-step click feeling.

JP-A-8-111134

  As described above, in the conventional switch device described in Patent Document 1, the first contact is connected by the first pressing operation, and then the second contact is connected by further pressing operation. Stage switch operation is possible. However, in the conventional switch device, the dome-shaped rubber is folded back during the pressing operation so that the movable contact comes into contact with the fixed contact, and it is necessary to perform a large pressing operation in order to connect the first contact. And the operation force of big pressing operation was required.

  On the other hand, by reducing the thickness of the dome-shaped rubber or softening the material of the dome-shaped rubber, the first contact can be connected with a slight pressing operation force by a slight pressing operation. In this case, however, the strength of the dome-shaped rubber is reduced, and if the switch device is repeatedly pressed, the dome-shaped rubber is repeatedly folded and the rubber may be damaged at the folded portion. there were.

  The present invention has been made in view of the actual situation of the prior art. The purpose of the present invention is to connect the first contact point with a very slight pressing operation, and then press the second contact point with a clear touch. It is an object to provide a switch device with pre-sense to which contacts are connected.

In order to solve this problem, in the switch device according to claim 1 of the present invention, the movable contact, the elastic body arranged under the movable contact, and the operation portion are operated by pressing the operation portion. An operating body to be moved, a movable contact, the elastic body, and a housing for housing the operating body, and a first fixed that is electrically connected to and separated from the movable contact and is electrically independent from the inner bottom of the housing. In a switch device comprising a case having a contact, a second fixed contact, and a third fixed contact,
The movable contact includes a leg portion disposed so as to be able to contact with and separate from the first fixed contact and the second fixed contact, and a dome portion capable of reversing operation and disposed so as to be able to contact and separate from the third fixed contact,
The elastic body contacts only the leg portion of the movable contact, and the movable contact is separated from the first fixed contact and the second fixed contact. Is located around
The elastic body is bent by the pressing operation to the operation portion, so that the leg portion of the movable contact comes into contact with the first fixed contact and the second fixed contact, and the first fixed contact and the second fixed contact. A fixed contact is electrically connected via the movable contact;
By further pressing operation on the operation portion, the dome portion of the movable contact is reversed and the third fixed contact and the dome portion are connected, and the first fixed contact, the second fixed contact, and the third fixed contact are connected. A contact is electrically connected through the movable contact.

  According to this configuration, since the movable contact is separated from the first fixed contact and the second fixed contact by the elastic body in contact with the leg portion, the elastic body is elastically deformed only by slightly pressing the operating body. A leg portion of the movable contact is in contact with the first fixed contact and the second fixed contact, the first fixed contact and the second fixed contact are electrically connected, and the first fixed contact and the second fixed contact are configured. Contacts. Further, when the operating body is further pressed, the dome portion of the movable contact is inverted to cause a click feeling, and the dome portion is kept in contact with the first fixed contact and the second fixed contact while the leg portion of the movable contact is in contact with the first fixed contact. The first fixed contact and the second fixed contact that are in contact with the three fixed contacts and electrically connected to the second fixed contact are connected. As a result, it is possible to configure a switch device with a sense, in which the first contact is connected by a very slight pressing operation, and then the second contact is connected by a pressing operation with a clear touch.

  The switch device according to claim 2 of the present invention is characterized in that the leg portion includes four partial leg portions, and the partial leg portions are arranged at corners of the case.

  With this configuration, since the partial legs can be arranged at the corners of the case, the substantially box-shaped case can be made small, and the switch device can be downsized. Further, since only the portion of the elastic body that comes into contact with the partial leg portion is deformed, the deformation resistance of the elastic body is reduced, the operating force of the pressing operation when the first contact is connected is reduced, and the elastic body is deformed. Since the amount of deformation of the portion can be increased, even if the gap between the tip of the partial leg and the first fixed contact and the second fixed contact is large, it can be reliably contacted with a light operating force.

  In the switch device according to claim 3 of the present invention, when the elastic body is bent below the portion of the inner bottom portion of the housing portion where the partial leg portion and the elastic body abut, There is an escape portion for avoiding the elastic body from coming into contact with the inner bottom portion.

  With this configuration, even if the elastic body bends when the first contact is connected, the elastic body does not come into contact with the inner bottom portion of the housing portion of the case, so the deformation resistance of the elastic body is reduced, and the first contact is Since the operation force of the pressing operation when connecting is reduced and the deformation amount of the deformed portion of the elastic body can be increased, even if the gap between the tip of the partial leg and the first fixed contact and the second fixed contact is large It can be contacted more reliably with a light operating force.

  The switch device according to claim 4 of the present invention is characterized in that the elastic body is divided so as to be in contact with only the four partial leg portions.

  With this configuration, since the elastic body deformed by the partial leg portion can be reduced, the deformation resistance of the elastic body is reduced, and the operating force of the pressing operation when the first contact is connected is further reduced. The operational feeling when the first contact is connected can be improved.

  According to the present invention, it is possible to configure a switch device with a sense, in which the first contact is connected by a very slight pressing operation, and then the second contact is connected by a pressing operation with a clear feel. Become.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows embodiment of the switch apparatus based on this invention, (a) is a perspective view which shows an external appearance, (b) is a disassembled perspective view which shows a structure. FIG. 3A is a plan view of the switch device according to the embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along line AA in FIG. 2A is a cross-sectional view taken along the line AA of FIG. 2A of the switch device according to the embodiment of the present invention, FIG. 2A is a cross-sectional view showing a state where the first contact is connected, and FIG. It is sectional drawing which shows the state which the contact connected. It is an external view which shows the structure of the switch apparatus which concerns on the 1st modification of embodiment of this invention, (a) is a perspective view which shows an external appearance, (b) is a disassembled perspective view which shows components structure. 4B is a cross-sectional view taken along the line B-B in FIG. 4 showing a contact state between the partial leg and the elastic body of the switch device according to the first modified example, and FIG. ) Is the state when the leg is in contact with the first fixed contact. It is an external view which shows the structure of the switch apparatus which concerns on the 2nd modification of embodiment of this invention, (a) is a perspective view which shows an external appearance, (b) is a disassembled perspective view which shows components structure. FIG. 6C is a cross-sectional view taken along the line CC of FIG. 6 showing a contact state between the partial leg and the elastic body of the switch device according to the second modified example, where (a) is a state when the operating body is not pressed; ) Is the state when the leg is in contact with the first fixed contact. It is an external view which shows the structure of the switch apparatus which concerns on the 3rd modification of embodiment of this invention, (a) is a perspective view which shows an external appearance, (b) is an exploded perspective view which shows components structure, (c) Is another modification of the elastic body according to this modification. FIG. 9 is a cross-sectional view taken along the line DD of FIG. 8 showing a contact state between the partial leg and the elastic body of the switch device according to the third modified example, where (a) is a state when the operating body is not being pressed; ) Is the state when the leg is in contact with the first fixed contact. It is another modification of the elastic body of the switch apparatus which concerns on the said 3rd modification. It is a block diagram of the switch apparatus of the prior art example shown by patent document 1. FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIG.

  FIG. 1 is a perspective view showing an appearance of a switch device according to an embodiment of the present invention. As shown in FIG. 1A, the switch device has a substantially box-shaped case 1 and an operating body 4 assembled to the case 1.

  FIG. 1B is an exploded perspective view showing a component configuration of the switch device. As shown in FIG. 1B, the switch device includes a case 1, an elastic body 2, a movable contact 3, and an operation body 4.

The case 1 is a substantially box-shaped part formed of a molding material or the like, and has a hollow shape on the upper surface. The hollow shape serves as a housing portion 1 a for housing the elastic body 2 and the movable contact 3. Further, the inner bottom portion of the accommodating portion 1a has a first fixed contact 1b and a second fixed contact 1c at the corner and the corner at the diagonal position, respectively, and a third fixed at a substantially central portion of the inner bottom. It has a contact 1d.
The first fixed contact 1b, the second fixed contact 1c, and the third fixed contact 1d each extend inside the case 1 and project outside the case 1, thereby forming terminal portions 1f.

  The elastic body 2 is a component in which an elastic material such as rubber is formed in a substantially ring shape.

  The movable contact 3 is made of a metal material such as stainless steel in a disk shape, the center is a dome portion 3a having a dome shape, and the periphery of the dome portion 3a is a conical leg portion 3b.

  The operation body 4 is formed of a film-shaped molding material or the like in a substantially rectangular shape, and has a dome-shaped operation portion 4 a having a gentler curvature than the dome portion 3 a of the movable contact 3 at the center.

  Next, an assembly configuration of the switch device according to the embodiment of the present invention will be described with reference to FIG. 2A is a plan view of the switch device according to the embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A.

  In this switch device, an elastic body 2 is placed in the housing portion 1 a of the case 1, the movable contact 3 is placed on the upper surface of the elastic body 2, and the operating body 4 is placed on the edge of the housing portion 1 a on the upper surface of the case 1. Is assembled and the housing portion 1a is sealed.

  The elastic body 2 is placed around the third fixed contact 1 d provided on the inner bottom of the housing portion 1 a of the case 1. The ring diameter of the elastic body 2 is set such that the elastic body 2 is separated from the first fixed contact 1b and the second fixed contact 1c.

  The movable contact 3 is placed on the upper surface of the elastic body 2, and the tip of the leg 3b is slightly separated from the first fixed contact 1b and the second fixed contact 1c. Further, the lower surface of the top portion of the operation portion 4 a of the operation body 4 is set to be close to the upper surface of the top portion of the dome portion 3 a of the movable contact 3.

  Next, the behavior when the switch device is pressed will be described with reference to FIG. 2B and FIG. 3A and FIG.

  FIG. 3 is a cross-sectional view of the switch device according to the embodiment of the present invention taken along the line AA in FIG. 2A. FIG. 3A shows a slight pressing operation of the operating body 4 to connect the first contact. FIG. 3B is a cross-sectional view showing a state where the operating body 4 is further pressed and the second contact point is connected.

FIG. 2B shows a state before the pressing operation, and the first fixed contact 1b and the second fixed contact 1c constituting the first contact and the leg portion 3b are slightly separated from each other, and the first fixed contact 1b and Since the second fixed contact 1c is not electrically connected, the first contact constituted by the first fixed contact 1b and the second fixed contact 1c is not connected.
If the centers of the movable contact 3 and the elastic body 2 are shifted, either the first fixed contact 1b or the second fixed contact 1c may come into contact with the leg 3b, but the first contact is the first fixed contact. Since it is configured by the contact 1b and the second fixed contact 1c, even when the leg portion is in contact with either the first fixed contact 1b or the second fixed contact 1c, the switch device operates without any trouble.

  When the operating portion 4a of the operating body 4 is slightly pressed, the elastic body 2 is elastically deformed and the movable contact 3 is lowered toward the inner bottom side of the housing portion 1a as shown in FIG. The part 3b contacts both the first fixed contact 1b and the second fixed contact 1c, the first fixed contact 1b and the second fixed contact 1c are electrically connected via the movable contact 3, and the first contact is connected. To do.

  By the way, as shown in FIG. 2B, the cross-sectional shape of the elastic body 2 is a shape in which a semicircular shape is connected to an upper portion of a substantially square shape. The abutting area of the elastic body 2 is very small even in the entire movable contact 3 because it is in contact with the lower surface of the leg 3b. Therefore, when the operating body 4 is slightly pressed, as shown in FIG. 3A, the semicircular shape of the cross section of the elastic body 2 is increased so that the contact area between the movable contact 3 and the elastic body 2 increases. Since the movable contact 3 is lowered and the first contact is connected only by crushing the portion, the first contact can be connected with a slight pressing force.

  In addition, since the dome portion 3a of the movable contact 3 is not reversed when the first contact is connected, a non-sense pre-sense operation can be realized.

  When the operation portion 4a is further pressed, as shown in FIG. 3B, the dome portion 3a reverses and the click feeling is felt while the leg portion 3b is in contact with the first fixed contact 1b and the second fixed contact 1c. The third fixed contact 1d and the dome portion 3a come into contact with each other. Accordingly, the third fixed contact 1d, the first fixed contact 1b, and the second fixed contact 1c are electrically connected via the movable contact 3, and the first fixed contact 1b and the second fixed contact 1c that are electrically connected are connected. Then, the second contact constituted by the third fixed contact 1d is connected.

  At this time, since the tip of the leg 3b is in contact with the first fixed contact 1b and the second fixed contact 1c, the reaction force against the operation force of the further pressing operation is the tip of the leg 3b and the first fixed contact 1b and Since the elastic body 2 is generated at the contact point with the second fixed contact 1c and the elastic body 2 is not further elastically deformed, damage due to excessive elastic deformation of the elastic body 2 can be avoided.

  Further, since the elastic body 2 is in contact with the leg portion 3b of the movable contact 3 with a small amount of movement during the reversing operation of the dome portion 3a, the dome of the movable contact 3 when the elastic body 2 is connected to the second contact. The inversion operation of the portion 3a is not hindered, and the second contact can be connected with a stable operation.

As described above, the switch device according to the embodiment of the present invention operates the movable contact 3 by pressing the movable contact 3, the elastic body 2 disposed under the movable contact 3, and the operation portion 4a. The operation body 4 to be moved, the movable contact 3, the elastic body 2, and the housing portion 1a for housing the operation body 4, and the movable contact 3 can be brought into and out of contact with the inner bottom portion of the housing portion 1a. It is composed of a case 1 having one fixed contact, a second fixed contact 1c, and a third fixed contact 1d.
The movable contact 3 includes a leg portion 3b disposed so as to be able to contact with and separate from the first fixed contact 1b and the second fixed contact 1c, and a dome portion 3a capable of reversing operation and disposed so as to be able to contact and separate from the third fixed contact 1d With
The elastic body 2 contacts only the leg 3b of the movable contact 3 so that the movable contact 3 is separated from the first fixed contact 1b and the second fixed contact 1c. Is located around
When the elastic body 2 is bent by the pressing operation to the operation portion 4a, the leg portion 3b of the movable contact 3 comes into contact with the first fixed contact 1b and the second fixed contact 1c, and the first fixed contact 1b and the second fixed contact. The contact 1c is electrically connected via the movable contact 3,
By further pressing operation on the operation portion 4a, the dome portion 3a of the movable contact 3 is reversed so that the third fixed contact 1d and the dome portion 3a come into contact with each other, and the first fixed contact 1b, the second fixed contact 1c, and the third fixed contact. Since the contact 1d is electrically connected via the movable contact 3,
The movable contact 3 is separated from the first fixed contact 1b and the second fixed contact 1c by the elastic body 2 in contact with the leg 3b.
The elastic body 2 is elastically deformed only by slightly pressing the operating body 4, the leg 3b of the movable contact 3 is in contact with the first fixed contact 1b and the second fixed contact 1c, and the first fixed contact 1b and the second fixed contact 1b. The fixed contact 1c is electrically connected via the movable contact 3, and the first contact formed by the first fixed contact and the second fixed contact 1c is connected to perform the pre-sense operation.
Further, when the operating body 4 is further pressed, the dome portion 3a of the movable contact 3 is reversed to cause a click feeling, and the leg portion 3b of the movable contact 3 is connected to the first fixed contact 1b and the second fixed contact 1c. The second contact formed by the first fixed contact 1b, the second fixed contact 1c, and the third fixed contact 1d that are in contact with the third fixed contact 1d while being in contact with the third fixed contact 1d. Connect.
As a result, a switch device with a sense can be configured in which the first contact is connected by a very slight pressing operation, and then the second contact is connected by a pressing operation with a clear feel.

<First Modification>
Hereinafter, a first modification of the embodiment of the present invention will be described with reference to FIGS. 4 and 5. In addition, about the structure same as embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

4A and 4B are external views showing the structure of a switch device according to a first modification of the embodiment of the present invention. FIG. 4A is a perspective view showing the external appearance, and FIG. 4B is an exploded perspective view showing the component structure. . In FIG. 4A, the display of the operation tool 4 is omitted for easy understanding.
5 is a cross-sectional view taken along the line BB in FIG. 4 schematically showing a contact state between the partial leg 13c and the elastic body 2. FIG. 5A is a state when the operation body 4 is not pressed, and FIG. Is a state when the operating body 4 is pressed and the partial leg 13c comes into contact with the first fixed contact 1b.

  In the switch device according to the first modification of the embodiment of the present invention, as shown in FIGS. 4A and 4B, the leg portion 13b of the movable contact 13 has four portions arranged in a substantially cross shape. The four partial legs 13c are arranged at the four corners of the inner bottom of the accommodating portion 1a of the case 1, and the elastic body 2 contacts only the lower surfaces of the four partial legs 13c.

  Since the four partial legs 13c are respectively arranged at the four corners of the inner bottom of the accommodating portion 1a of the case 1, it is not necessary to accommodate the leg portions 13b of the movable contact 13 in the side portion of the case 1, so that the case 1 Can be made smaller.

  When the switch device is not pressed, as shown in FIG. 5A, the lower surface of the partial leg 13c abuts against the elastic body 2, and the first fixed contact 1b and the second fixed contact 1c (not shown) Since the leg 13c is separated and the first fixed contact 1b and the second fixed contact 1c are not electrically connected, the first contact constituted by the first fixed contact 1b and the second fixed contact 1c is Not connected.

  When the switch device is slightly pressed, as shown in FIG. 5B, the partial leg 13c is lowered by elastically deforming the elastic body 2, and the first fixed contact 1b and the second fixed contact 1c (not shown). And the partial leg 13c abut, the first fixed contact 1b and the second fixed contact 1c are electrically connected via the movable contact 13, and the first contact is connected. At this time, since the elastic body 2 is elastically deformed only at the portion in contact with the partial leg 13c, the deformation resistance is small, and the first contact can be connected with a very small operating force of the pressing operation. Further, since the elastic body 2 is greatly elastically deformed even with the same operating force, even if the gap between the tip of the partial leg 13c and the first fixed contact 1b and the second fixed contact 1c is large, the elastic body 2 can be reliably contacted. And it can avoid that the dimensional accuracy request | requirement of the elastic body 2 becomes severe.

  As described above, in the switch device according to the first modification of the embodiment of the present invention, the leg portion 13b of the movable contact 13 includes the four partial leg portions 13c, and the partial leg 13c portion extends to the corner portion of the case 1. Therefore, the partial legs 13c can be arranged at the corners of the case, and the substantially box-shaped case 1 can be made small, so that the switch device can be miniaturized. Moreover, since only the part which contact | abuts the partial leg 13c part deform | transforms the elastic body 2, the deformation resistance of the elastic body 2 decreases, the operation force when the first contact is connected becomes light, and the elastic body 2 Since the amount of deformation can be increased, even if the gap between the tip of the partial leg 13c and the first fixed contact 1b and the second fixed contact 1c is large, it can be reliably contacted.

<Second Modification>
Hereinafter, a first modification of the embodiment of the present invention will be described with reference to FIGS. In addition, about the structure same as embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  6A and 6B are external views showing the structure of a switch device according to a second modification of the embodiment of the present invention. FIG. 6A is a perspective view showing the external appearance, and FIG. 6B is an exploded perspective view showing the component structure. . In FIG. 6A, the display of the operation body 4 is omitted for easy understanding. 7 is a cross-sectional view taken along the line C-C in FIG. 6, schematically showing a contact state between the partial leg 13 c and the elastic body 2, and (a) is a state when the operating body 4 is not pressed, (b) Is a state when the operating body 4 is pressed and the partial leg 13c comes into contact with the first fixed contact 1b.

  In the switch device according to the second modification of the embodiment of the present invention, as shown in FIGS. 6A and 6B, the leg portion 13b of the movable contact 13 has four portions arranged in a substantially cross shape. The four partial legs 13c are arranged at the four corners of the inner bottom of the accommodating portion 1a of the case 1, and the elastic body 2 contacts only the lower surfaces of the four partial legs 13c. Furthermore, the area | region which opposes the site | part which the elastic body 2 and the four partial legs 13c contact | abut in the inner bottom part of the accommodating part 1a of case 1 was dented, and four escape parts 1e were provided.

  When the switch device is not pressed, as shown in FIG. 7A, the lower surface of the partial leg 13c is in contact with the elastic body 2, and the first fixed contact 1b and the second fixed contact 1c (not shown) Since the leg 13c is separated and the first fixed contact 1b and the second fixed contact 1c are not electrically connected, the first contact constituted by the first fixed contact 1b and the second fixed contact 1c is Not connected.

When the switch device is slightly pressed, the partial leg 13c is lowered by deforming the elastic body 2 as shown in FIG. 7B, and the first fixed contact 1b and the second fixed contact 1c (not shown) The partial leg 13c abuts, the first fixed contact 1b and the second fixed contact 1c are electrically connected, and the first contact is connected.
At this time, since the escape portion 1e is provided in the case 1, when the switch device is slightly pressed and the elastic body 2 is deformed, the elastic body 2 is not deformed in cross-section, but the circular shape of the elastic body 2 The elastic body 2 in a portion that is partially bent in the circumferential direction and abuts on the portion leg 13c is deformed so as to enter the escape portion 1e.

  Thereby, since the deformation resistance of the elastic body 2 becomes small, the first contact point can be connected with an operation force of a very slight pressing operation.

  As described above, in the switch device according to the second modified example of the embodiment of the present invention, the elastic body 2 is provided below the portion of the inner bottom portion of the housing portion 1a of the case 1 where the partial leg 13c and the elastic body 2 are in contact. Since the escape portion 1e is provided to avoid the elastic body 2 from coming into contact with the inner bottom portion when bent, the elastic body 2 remains in the case 1 even if the elastic body 2 is bent when the first contact is connected. Since it does not contact the bottom, the deformation resistance of the elastic body 2 is reduced, the operating force when the first contact is connected is reduced, and the amount of deformation of the elastic body 2 can be increased. Even if there is a large gap between the tip of the first fixed contact 1b and the second fixed contact 1c, the contact can be made more reliably.

<Third Modification>
Hereinafter, a third modification of the embodiment of the present invention will be described with reference to FIGS. In addition, about the structure same as embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

FIG. 8 is an external view showing the structure of a switch device according to a third modification of the embodiment of the present invention, (a) is a perspective view showing the external appearance, and (b) is an exploded perspective view showing a component structure. . In FIG. 8A, the display of the operation tool 4 is omitted for easy understanding.
FIG. 9 is a cross-sectional view taken along the line DD in FIG. 8 schematically showing a contact state between the partial leg 13c and the elastic body 12. FIG. 9A shows a state in which the operating body 4 is not pressed, and FIG. Is a state when the operating body 4 is pressed and the leg portion 13b comes into contact with the first fixed contact 1b.
FIG. 10 shows another modification of the elastic body according to this modification.

  In the switch device according to the third modification of the embodiment of the present invention, as shown in FIGS. 8A and 8B, the leg portion 3b of the movable contact 3 has four portions arranged in a substantially cross shape. The four partial legs 13c are arranged at the four corners of the inner bottom of the accommodating portion 1a of the case 1, and the elastic body 12 is four elastic bodies that respectively contact the four partial legs 13c. It consists of a piece 12a.

  When the switch device is not pressed, as shown in FIG. 9A, the lower surface of the partial leg 13c is in contact with the elastic body piece 12a, and the first fixed contact 1b and the second fixed contact 1c (not shown). And the partial leg 13c are separated from each other, and the first fixed contact 1b and the second fixed contact 1c are not electrically connected, so that the first contact formed by the first fixed contact 1b and the second fixed contact 1c is used. Is not connected.

  When the switch device is slightly pressed, the partial leg 13c is lowered by elastically deforming the elastic body piece 12a as shown in FIG. 9B, and the first fixed contact 1b and the second fixed (not shown). The contact 1c and the partial leg 13c abut, the first fixed contact 1b and the second fixed contact 1c are electrically connected via the movable contact 13, and the first contact is connected. At this time, since the elastic body piece 12a has only a length that contacts the lower surface of the four partial legs 13c, when the operation portion 4a of the operation body 4 is slightly pressed, as shown in FIG. 9B. In addition, since the elastic body pieces 12a are elastically deformed in the cross-sectional direction and the longitudinal direction, respectively, the deformation resistance is reduced, and the first contact can be connected by lowering the partial leg 13c with an extremely small pressing force. . In addition, since the elastic body piece 12a has a small deformation resistance, it can be elastically deformed greatly even with the same operating force. Therefore, the gap between the tip of the partial leg 13c and the first fixed contact 1b and the second fixed contact 1c is large. Can also be reliably contacted, and it can be avoided that the dimensional accuracy requirements of the movable contact 13 and the elastic body 12 become severe.

  Furthermore, since the elastic body 12 is made of the four elastic body pieces 12a, only a small amount of material such as rubber is used, and raw materials can be saved.

  As described above, in the switch device according to the third modified example of the embodiment of the present invention, the leg portion 13b includes the four partial leg portions 13c, and the elastic body 12 is divided into only the four partial leg 13c portions. Since the elastic body 12 is arranged so as to abut, the deformation resistance of the elastic body 12 is reduced, the operation force of the pressing operation when the first contact is connected is lightened, and the deformation amount of the elastic body 2 can be increased. Therefore, even if there is a large gap between the tip of the partial leg 13c and the first fixed contact 1b and the second fixed contact 1c, the contact can be ensured.

  The elastic body 12 may not be an independent elastic body piece 12a, but may be a single component in which the elastic body pieces 12a are connected by a thin connection portion 12b as shown in FIG. Alternatively, the elastic body piece 12a may be directly formed on the case 1.

  Further, the switch device is slightly pressed by providing an escape portion recessed at a shorter length than the elastic element piece 12a at a portion facing the elastic element piece 12a at the inner bottom of the housing part 1a of the case 1. When the elastic body piece 12a is deformed, the cross section of the elastic body piece 12a is not deformed, but is partially bent in the circumferential direction of the elastic body piece 12a and comes into contact with the partial leg 13c portion. The elastic element piece 12a of the portion is deformed so as to enter the escape portion, and the operation force of the pressing operation when the first contact is connected can be further reduced.

DESCRIPTION OF SYMBOLS 1 Case 1a Housing | casing part 1b 1st fixed contact 1c 2nd fixed contact 1d 3rd fixed contact 1e Escape part 1f Terminal part 2 Elastic body 3 Movable contact 3a Dome part 3b Leg part 4 Operation body 4a Operation part 12 Elastic body 12a Elastic body Element 12b Connection part 13 Movable contact 13b Leg part 13c Partial leg

Claims (4)

A movable contact, an elastic body arranged under the movable contact, an operating body that operates the movable contact by pressing an operating portion, and the movable contact, the elastic body, and the operating body are accommodated. A switch comprising a housing and having a case having a first fixed contact, a second fixed contact, and a third fixed contact electrically connected to and away from the movable contact and electrically independent from the inner bottom of the housing In the device
The movable contact includes a leg portion disposed so as to be able to contact with and separate from the first fixed contact and the second fixed contact, and a dome portion capable of reversing operation and disposed so as to be able to contact and separate from the third fixed contact,
The elastic body contacts only the leg portion of the movable contact, and the movable contact is separated from the first fixed contact and the second fixed contact. Is located around
The elastic body is bent by the pressing operation to the operation portion, so that the leg portion of the movable contact comes into contact with the first fixed contact and the second fixed contact, and the first fixed contact and the second fixed contact. A fixed contact is electrically connected via the movable contact;
By further pressing operation on the operation portion, the dome portion of the movable contact is reversed and the third fixed contact and the dome portion are connected, and the first fixed contact, the second fixed contact, and the third fixed contact are connected. A contact device is electrically connected via the movable contact.   The switch device according to claim 1, wherein the leg portion includes four partial leg portions, and the partial leg portions are arranged at corners of the case.   Avoiding the elastic body from abutting against the inner bottom when the elastic body is bent below the portion of the inner bottom portion of the housing portion where the partial leg portion and the elastic body abut. The switch device according to claim 2, wherein there is an escape portion.   The switch device according to claim 2, wherein the elastic body is divided so as to be in contact with only the four partial leg portions.