TWI633567B - Push switch - Google Patents

Abstract

An object of the present invention is to provide a structure in which the operating member and the operating member are individually actuated, and the push switch is configured to be able to grasp the state of the switch from the position of the operating member.

The solution of the present invention is provided with a first spring (51), supporting the operating member (10) and the operating member (20) on the casing (30), and pushing the operating member (10) in a protruding direction; (52), pushing the actuating member (20) toward the operating member (10). It also includes a holding mechanism (A) that holds the operating member (10) at an operating intermediate position in the middle of the operating area, and holds the operating member (20) at an operating intermediate position in the middle of the operating area.

Description

Push switch

The present invention relates to a push switch, and more particularly, to a switch having a structure that presses an operation member to mechanically maintain an operation state.

The press switch configured as described above in Patent Document 1 discloses a technology including a key top that can be moved up and down freely with respect to a box-shaped case, and a slider, and further includes a key top that protrudes upward. The spring that pushes in the direction and the spring that pushes the slider in a direction to abut the key top also include a switch contact to be operated in accordance with the movement of the slider, and a lock contact for locking the slider Pieces of locking mechanism.

In Patent Document 1, the locking mechanism is configured by a heart-shaped cam groove formed in a slider and a hook pin that engages one end of the cam groove into the cam groove. In this case, when the key top is pressed, the slider is actuated by the pressing force from the key top to make the switch contact conductive, and the locking mechanism is used to keep the slider in the locked position. It will return to the non-operating position due to the spring force of the spring.

In addition, Patent Document 2 discloses the following technology, Preparation: The movable member can be freely moved toward the housing and is pushed in the protruding direction. It also includes a switching element that is linked to the movable member and also has a locking means for locking the movable member at a predetermined position.

In Patent Document 2, a movable member is elastically pushed in a protruding direction by a spring, and as a locking means, a heart-shaped cam groove formed in the movable member and a locking member inserted into the cam groove are provided.

[Prior technical literature]

[Patent Literature]

[Patent Document 1] JP 2007-323829

[Patent Document 2] JP 2007-103201

In the push switches shown in Patent Documents 1 and 2, the ON state is maintained after the ON state is reached by a pressing operation, and the OFF state is maintained when the switch is switched to the OFF state by performing the pressing operation again. In order to realize the above-mentioned operating system, a locking mechanism is provided, which includes a heart-shaped cam groove and a member that is engaged with the cam groove.

As described in Patent Document 1, in a structure in which a key top for manual operation and a slider having a switch contact are individually operated, after the key top is pressed, the key top is restored to whatever the state of the switch. Original location. Therefore, the state of the switch cannot be grasped from the position of the key top. Therefore, in Patent Document 1, the state of the switch can be grasped by switching the LED inside the key top to ON or OFF according to the state of the switch.

However, as described in Patent Document 1, in a structure in which a state of a switch is notified by turning on or off an LED, since a circuit for controlling the LED must be provided in the switch, the number of parts is increased, and It is thought that when the LED or circuit fails, the state of the switch cannot be grasped, and there is room for improvement.

On the other hand, although the structure of Patent Document 2 is a structure in which the position of the movable member for manual operation corresponds to the state of the switch, it cannot be applied to the key top and the slider as shown in Patent Document 1. Individually operated structures.

Even if it is a push switch that individually operates a key top for manual operation and a slider having a switch contact as shown in Patent Document 1, it is desirable to be able to grasp the state of the switch from the position of the key top. However, in order to maintain the position of the key top to reflect the state of the switch, in addition to the locking mechanism to maintain the position of the slider, it is also necessary to have a locking mechanism to maintain the position of the operating member. From the viewpoint of increasing the number of parts, there is room for improvement in the above structure.

An object of the present invention is to reasonably configure a push switch so that the state of the switch can be grasped from the position of the operation member in a structure in which an operation member for manual operation and an operation member interconnected with the switch unit are individually operated.

The present invention is characterized by comprising: an operating member that moves linearly along the operation by human operation; an actuating member that moves linearly along the operation by a pressing force from the operating member; and a switch unit that is formed to act on the aforementioned operation. The conduction state corresponding to the operating position of the component; the shell is used to support the component, It also includes a first ejection mechanism that ejects the operation member from the housing, a second ejection mechanism that ejects the operation member and the operation member, and a holding mechanism that can The operation member is maintained at an operation intermediate position in the middle of the operation region, and the operation member can be maintained at the operation intermediate position in the middle of the operation region, The holding mechanism includes a heart-shaped cam groove formed in the actuating member, and an engaging member that supports the base end portion by the housing and engages the engaging end portion into the cam groove to cause the card to engage. The closing end portion moves along the cam groove along with the reciprocating motion of the actuating member, and The operation holding portion is formed in the path of the cam groove, and the operation holding portion is engaged with the engaging end portion to hold the operation member at the operation intermediate position, and the operation holding portion is formed at In the operation member, the operation holding portion is held in the operation intermediate position by being engaged with the engagement end portion in a state where the engagement end portion is swung to a position detached from the operation holding portion. .

According to the above structure, the operating member is formed into a non-safety state in a state where the operating member is held at the intermediate position by the holding mechanism. It can be moved to the protruding end formed by the elastic pushing force of the first elastic pushing mechanism in the holding state. Thereafter, when the operating member is pushed in, the holding of the actuating member by the holding mechanism is released, and the actuating member can be moved to the protruding position by the elastic pushing force of the second ejecting mechanism, and the operating member can be moved by the retaining mechanism. Keep it in the middle of operation.

That is, the switch unit is interconnected with the actuating member. When the actuating member is held by the holding mechanism, the operating member is positioned at the protruding end, and when the holding of the actuating member is released, the operating member is positioned under pressure. Into the position.

Therefore, in a structure in which an operating member for manual operation and an operating member interconnected with the switch unit are individually operated, the push switch is reasonably configured to be able to grasp the state of the switch from the position of the operating member.

In the present invention, when the operating member is pushed into the operating end on the pressing side by pressing the operating member, and then the pushing-in operation is released, the engaging end of the engaging member The part is engaged with the operation holding part to resist the elastic pushing force generated by the second elastic pushing mechanism, and maintains the operating member at the intermediate position of the operation. In the case of the actuation member that is generated by the next press-in operation of the operation member, the engagement end portion will be disengaged from the actuation holding portion by swinging, and the press-in operation will be released later. The engaging end portion is engaged with the operation holding portion to resist the elastic pushing force generated by the first elastic pushing mechanism, and the operation member is maintained at the operation intermediate position.

According to the above structure, the engaging end of the engaging member The portion is engaged with the operation holding portion of the cam groove to hold the operation member at the operation intermediate position. After that, after pressing the operation member to disengage the engaging member from the actuating holding portion, the engaging end portion of the engaging member is engaged with the operation holding portion of the operating member to hold the operating member in operation. middle place. That is, even if the two locking mechanisms are not provided by the common engagement member, the holding of the operating member and the holding of the operating member are achieved.

According to the present invention, the housing may also have a storage space for accommodating the actuating member into a freely reciprocating movement, and in the accommodation space, the engaging member will be available at a position along the cam groove of the actuating member. The first hole portion through which the engaging end portion is formed is formed on the outer wall surface, A slide system formed on the operation member is disposed at a position overlapping the outside of the outer wall surface, and a second hole portion through which the engagement end portion of the engagement member can pass is formed in the slide body, and in the second hole The operation holding portion is formed on the inner periphery of the portion.

According to the above structure, the engaging end portion of the engaging member is penetrated into the second hole portion of the sliding body and the first hole portion of the outer wall surface of the housing, and the engaging end portion is fitted into the cam groove of the actuating member. . In addition, the engaging end portion of the engaging member moves along the cam groove in accordance with the operation of the actuating member, and can be engaged with the actuating holding portion. Thereafter, after the engagement member is disengaged from the operation holding portion in accordance with the operation of the actuation member, the engagement end portion can be engaged with the operation holding portion by swinging the engagement member.

According to the present invention, the cam groove may further include a first path for the engaging end portion located at an initial position corresponding to the operation holding portion, and the movement of the operation member caused by the pressing force of the operation member. While moving along the inclined path portion inclined with the operation straight line; and the second path, when the pressing force is released in a state where the engaging end portion reaches the moving end of the first path, the engaging end portion is caused With the movement of the operating member caused by the elastic pushing force of the second elastic pushing mechanism, the movement to the operating holding portion is performed, It is formed on the inner edge of the second hole portion: the guide portion releases the pressing force of the operation member before reaching the engagement end portion to be able to move the engagement end portion to the operation holding portion. When the actuating member is moved in the protruding direction by the elastic pushing force, and the engaging end portion is moved in the inclined path portion of the first path, the operating member is returned with the elastic pushing force of the first elastic pushing mechanism. The operation to the operation intermediate position makes contact with the engaging end portion, and the contact acts on the engaging end portion in a direction toward the initial position.

According to the above structure, if the pushing-in operation is canceled when the pushing-in operation of the operating member is insufficient, the engagement end portion of the locking member cannot be moved to the actuating holding portion. The actuating member is moved in the protruding direction by the elastic pushing force of the pushing mechanism, and the engaging end portion is moved in the reverse direction in the inclined path portion of the first path in accordance with the operation. In addition, when the push-in of the operating member is released, the operating member is moved in the protruding direction by the elastic pushing force of the first pushing mechanism, and a guide portion formed on the inner edge of the second hole portion is accompanied by the operation. In contact with the engaging end portion, the guide portion acts on the engaging end portion in a direction toward the initial position. Accordingly, the operation end portion can be reliably moved to the initial position and can be held in the operation holding portion.

According to the present invention, the second hole portion may include a slit-shaped guide opening portion, and after the engagement end portion reaches a position capable of engaging with the operation holding portion, the pressing operation of the operation member may be released. When the operating member is moved in the protruding direction due to the elastic pushing force of the first elastic pushing mechanism, the engaging end portion is allowed to relatively move relative to the operating member, and the protruding side of the guide opening portion is allowed to move. The inner surface of the end portion forms an abutment surface that abuts the engaging end portion and determines the limit position of the protruding direction of the operating member, and the opening width of the guide opening portion is set to limit the generation of the engaging member. The value of the swing.

According to the above structure, in a state where the engagement end portion reaches a position where it can be engaged with the actuation holding portion, when the press-in operation of the operating member is released, the engagement end portion is engaged with the actuation holding portion to determine the actuation member. s position. In addition, in a state where the engaging end portion can be engaged with the actuating holding portion, when the pushing-in operation of the operating member is cancelled, the operating member is moved in the protruding direction due to the elastic pushing force of the first elastic pushing mechanism, so that The engaging end portion moves relatively inside the guide opening portion. Since an abutment surface for abutting the engagement end portion is formed on the inner surface of the end portion on the extension side of the guide opening portion, the engagement member is determined by abutting the abutment surface on the abutment surface. Prominent position. In addition, since the opening width of the guide opening is set to a width that restricts the engagement member from swinging, even when a load such as vibration is applied from the outside, the engagement end portion is prevented from being disengaged from the actuating holding portion. Disadvantages.

According to the present invention, the switch unit may include a movable contact that moves integrally with the actuating member, and a movable contact supported by the housing and The fixed contact is in contact with the movable contact.

According to the above-mentioned structure, the movable contact can be brought into contact with the fixed contact in accordance with the position of the actuating member, or the conductive state corresponding to the position of the operating member can be made by separating the movable contact from the fixed contact.

10‧‧‧ Operating member

13‧‧‧ sliding body

16‧‧‧ 2nd hole

16B‧‧‧Guide opening

16Bt‧‧‧ abutting surface

16G‧‧‧Guide

20‧‧‧ Acting component

30‧‧‧shell

31‧‧‧Containment space

35‧‧‧outer wall surface

35A‧‧‧The first hole

40‧‧‧Switch Department

41‧‧‧ movable contact

42‧‧‧Fixed contacts

51‧‧‧The first ejection mechanism (the first spring)

52‧‧‧ 2nd push mechanism (2nd spring)

55‧‧‧Cam groove

55A‧‧‧Operation holding unit

56‧‧‧ Engagement member (hook lever)

56B‧‧‧ Engagement end

57‧‧‧Operation and Maintenance Department

A‧‧‧ holding agency

Ga‧‧‧ initial position

X‧‧‧ operating line

Pa‧‧‧Initial operation position (operation intermediate position)

Rb‧‧‧First Path

Rc‧‧‧Second Path

Qc‧‧‧Mid position (2nd position)

Fig. 1 is an exploded perspective view of a push switch.

Fig. 2 is a perspective view showing a structure of a holding mechanism.

Fig. 3 is a perspective view showing a cam groove and a hook lever.

FIG. 4 is a diagram showing a slider and a hook lever in an initial state.

Fig. 5 is a diagram showing the positional relationship of each part in the initial state.

Fig. 6 is a diagram showing the slider and the hook lever in the first operation state.

FIG. 7 is a diagram showing the positional relationship of each part in the first operation state.

Fig. 8 is a diagram showing the slider and the hook lever in the second operation state.

FIG. 9 is a diagram showing the positional relationship of each part in the second operation state.

Fig. 10 is a diagram showing the slider and the hook lever in the third operation state.

FIG. 11 is a diagram showing the positional relationship of each part in the third operation state.

Fig. 12 is a diagram showing a state where the guide portion is brought into contact with the engaging end portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Basic structure]

As shown in Figs. 1 to 3, the push-to-open relationship includes an operating member 10, an actuating member 20, a housing 30, a first spring 51 as a first spring mechanism, and a second spring as a second spring mechanism. 52. The switch unit 40 and the holding mechanism A are configured.

This press-on relationship is such that the operating member 20 is interconnected with a manual operation of the operating member 10, and the switch unit 40 displays a conduction state corresponding to the operating position of the operating member 20, thereby detecting the operating state.

In addition, the operating member 10, the operating member 20, and the case 30 are formed of an insulating resin, and the first spring 51 and the second spring 52 are formed of a compression coil type by a spring material.

In the push switch, the operation member 10 is manually pushed in from the initial state shown in FIGS. 4 and 5 to reach the first position shown in FIGS. 6 and 7. 1 operation state, and then release the operation force to move it to the second position shown in FIG. 8 and FIG. 9 Operation status. Next, the operation member 10 is manually pushed in to move it to the third operation state shown in FIGS. 10 and 11, and then reset to the 4th figure by releasing the operation force and The initial state shown in FIG. 5.

That is, by repeatedly pressing in the operation member 10 from the initial state, the operation member 10 changes position in the following order: the initial operation position Pa (one example of the operation intermediate position), the first operation position Pb, The second operation position Pc and the third operation position Pd. In addition, the position of the actuating member 20 interconnected will change in the following order: the initial actuating position Qa, the first actuating position Qb (one example of the actuating end on the pressing side), and the second actuating position Qc (the actuating intermediate position (One example), the third operating position Qd. Hereinafter, the structure and operation form of each part will be described.

[Operational components. Acting components. case]

As shown in FIG. 1 to FIG. 11, the operation member 10 includes a button 11 for manual operation at an end portion, and includes an abutment projection 12 extending in a direction along the operation line X, and an operation along the operation direction. A plate-shaped sliding body 13 extending in the direction of the straight line X, and a pair of guided protrusions 14 formed on one of the protruding ends of the sliding body 13. The operation member 10 has a first spring receiving space 15 formed in a ring shape in a region along the outer periphery of the abutting projection 12.

Although the operation member 10 is formed integrally with the button 11, it may be configured, for example, as another member including a key top on the outer end side.

The actuating member 20 integrally forms a pair of guided piece 21 and a switch operation piece 22. The actuating member 20 is formed with a second spring accommodation space 23 having a ring shape with respect to the actuating member 20.

The housing 30 is formed with a storage space 31 for accommodating the operating member 20 and the second spring 52, and is formed in a form in which the switch support portion 32 protrudes outward. The housing 30 is formed with a pair of first guide grooves 33 into which the guided protrusions 14 of the operation member 10 are fitted, and a pair of first guide grooves 33 into which the pair of guided pieces 21 of the operating member 20 are fitted. 2 引 沟 34。 2 guide groove 34.

An outer wall surface 35 is formed in the housing 30 along the cam groove 55 formed in the actuating member 20 in the accommodation space 31, and a base supporting the hook lever 56 as an engaging member is formed at a position adjacent to the housing wall 31. The proximal end support portion 36 of the end portion 56A.

The first spring 51 has a configuration in which one end portion is accommodated in the first spring accommodation space 15 and a portion of the other end portion is embedded in the housing 30, and is disposed between the operation member 10 and the housing 30. A spring thrust is applied in a direction in which the operation member 10 projects from the housing 30.

The second spring 52 is configured to accommodate a part of the second spring accommodating space 23 in the second spring accommodation space 23, and is disposed between the operating member 20 and the housing 30 to apply a spring thrust in a direction in which the operating member 20 approaches the operating member 10.

[Switch section]

The switch section 40 is provided with a switch operation piece 22 of the actuated member 20 A supported movable contact 41, a fixed contact 42 in contact with the movable contact 41, and a substrate 43 on which the fixed contact 42 is formed are configured. The substrate 43 is supported by the switch support portion 32.

The movable contact 41 is formed by integrally forming three contact portions with a good conductor made of a metal material such as a copper alloy. The three movable contacts 41 have a structure that is connected by a plate-like portion, and in a state where the three pin portions formed in the switch operating piece 22 are penetrated through the three connection hole portions formed in the plate-like portion, It is supported by the switch operating piece by processing such as riveting processing.

The fixed contact 42 is a three-row conductive portion formed by a good conductor made of a metal material such as a copper alloy. One of the three rows of conducting portions is formed in a straight line and contacts one of the three contact portions at any time, and functions as a voltage applying portion. In addition, the conduction sections in the other two rows function as detection sections, and correspond to the positions of the actuating members 20 and are formed at positions contacting the conduction sections.

This switch section 40 causes the voltage application section and the two rows of detection sections (conducting) to be turned on when the operating member 20 is positioned at the first operating position Pb shown in FIG. 6 by pressing the operating member 10. Section) is formed in a conducting state. In addition, when the operation member 10 is positioned at the second operation position Pc and the third operation position Pd shown in FIG. 9, the voltage application section and the detection section (conduction section) in one row are brought into a conductive state. When the operation member 10 is positioned at the initial operation position Pa (an example of the operation intermediate position) shown in FIG. 5, the voltage application section is not connected to any detection section (conducting section). This makes it possible to play a role as a detection unit. The operating potential is detected by the potentials of the two rows of conducting portions.

The structure of the switch section 40 of the present invention is not limited to the above-mentioned structure. For example, when the operation member 10 is located at the first operation position Pb, the voltage of the two-row conduction section that functions as a detection section is reduced to Ground voltage (zero voltage). In addition, the switch unit 40 may be configured such that the operating position of the operating member 20 can be detected by including a pair of guide switches in the housing 30 and a permanent magnet in the operating member 20.

[Holding mechanism]

As shown in FIGS. 2 and 3, the holding mechanism A is configured by a heart-shaped cam groove 55 formed in the actuating member 20, and a hook lever that engages the engagement end portion 56B with the cam groove 55. 56 (an example of an engagement member), an operation holding portion 57 formed in the operation member 10 to engage with the engagement end portion 56B of the hook lever 56, and a third coil spring 58. The heart-shaped cam groove 55 and the hook lever 56 as an engaging member are conventionally referred to as a heart-shaped cam or the like. The holding mechanism A of the present invention is formed by a structure of a heart-shaped cam and is formed on an operating member. The operation holding portion 57 of the sliding body 13 of 10 is configured.

The hook lever 56 is formed by bending one end of a rod extending along the operation line X in a direction orthogonal to the operation line X to form a base end portion 56A, and the other end portion is orthogonal to the operation line X. It is bent in the direction to form the base end portion 56B. The base end portion 56A is rotatably supported by the base end support portion 36 of the housing 30. Therefore, the engaging end portion 56B The base end portion 56A is formed so as to be able to swing freely. The engaging end portion 56B is maintained in a state of being engaged with the cam groove 55 by the elastic pushing force of the third coil spring 58.

In the outer wall surface 35 of the case 30, a first hole portion 35A through which the engaging end portion 56B of the hook lever 56 penetrates is formed into an arc shape. A sliding body 13 of the operating member 10 is disposed at a position overlapping the outer wall surface 35, and a second hole shape 16 is formed in the sliding body 13 through which the engaging end 56B of the hook lever 56 penetrates, and in the second hole portion The opening edge of 16 forms the operation holding portion 27 in a concave shape. The second hole portion 16 includes a main opening portion 16A that allows the engagement end portion 56B to swing, and a slit-shaped guide opening portion 16B that allows the operation member 10 to move to the initial operation position Pa. The slit width of the guide opening portion 16B is slightly wider than the diameter of the engaging end portion 56B, and is set to a value for restricting the hook lever 56 (engaging member) from swinging.

In addition, a guide portion 16G is formed on the inner edge of the second hole portion 16 and has an oblique attitude with respect to the operation line X in a direction viewing angle shown in FIG. 4 (and the initial position in the first path Rb and the neutral position). (The oblique path part connected to Ga is in a parallel posture). The guide portion 16G is set so that the operating member 10 comes into contact with the engaging end portion 56B of the hook lever 56 when the operation member 10 returns to the initial operation position Pa (operation intermediate position) due to the elastic force of the first spring 51. On the other hand, a force acting on the engaging end portion 56B to return to the initial position Ga.

Thereby, the base end portion 56A of the hook lever 56 is supported by the base end support portion 36 to be swingable freely, and the engaging end portion 56B of the hook lever 56 penetrates the second hole portion 16 and the outer wall surface 35 of the sliding body 13. First hole 35A It engages with the cam groove 55 in the state.

The cam groove 55 forms a segmented portion and an inclined surface on the bottom surface of the cam groove 55 in a predetermined order, so that the engaging end portion 56B of the hook lever 56 moves with the action of the movable member 20, and is indicated by an arrow in FIG. 3 The loop follows the shape of the bottom surface of the cam groove 55 as shown. A path of the cam groove 55 is formed with an operation holding portion 55A that engages with the engaging end portion 56B of the hook lever 56 when the operation member 20 reaches the middle of the operation region.

As a specific structure, as shown in FIG. 4, FIG. 6, FIG. 8, and FIG. 10, the cam groove 55 uses the first path Rb, the second path Rc, the third path Rd, and the fourth path Re. It is formed into a heart-shaped closed loop. The first path Rb is for the engaging end portion 56B to move from the initial position Ga to the first position when the operating member 10 is pushed in from the initial operating position Pa and the operating member 20 is moved along with the movement of the operating member 10. 1 guides the path at position Gb. In this first path Rb, the engaging end portion 56B at the initial position of the pressing position Ga is moved in a direction inclined with respect to the operation line X, and then the engaging end portion 56B is formed. The movement is performed in a direction parallel to the operation straight line X to guide it to the first guide position Gb.

In addition, the second path Rc is formed in a shape in which the pressing force of the operating member 10 is released in a state where the engagement end portion 56B reaches the first guide position Gb, which is the moving end of the first path Rb, and is accompanied by The actuating member 20 is moved by the elastic pushing force of the second spring 52, so that the engaging end portion 56B is moved to the actuating holding portion 55A. The engagement guide 56B is held at the second guide position Gc by this movement.

The third path Rd is a path in which the operating member 10 is pushed in such a state that the engaging end portion 56B is held at the second guide position Gc (actuating holding portion 55A) so that the operating member 20 accompanies the pushing in When moving, the engaging end portion 56B is disengaged from the operation holding portion 55A and moved to the third guide position Gd. In addition, the fourth path Re is formed in a straight line parallel to the operation line X. In a state where the engagement end portion 56B reaches the third guide position Gd as the moving end of the third path Rd, the operation member 10 is moved. When the pressing force is released, the engaging end portion 56B is moved to the initial position Ga along with the movement of the actuating member 20 in the protruding direction.

As shown in the above structure, by accommodating the actuating member 20 in the accommodation space 31 of the housing 30, the guided piece 21 of the actuating member 20 is fitted into a pair of second guide grooves 34 of the housing 30, and the actuating member 20 is It becomes possible to move along the operation line X. In addition, when the guided protrusion 14 of the operation member 10 is fitted into the first guide groove 33, the operation member 10 can move along the operation line X.

[Action form]

In the initial state shown in FIGS. 4 and 5, the push switch engages the engaging end portion 56B of the hook lever 56 with the operation holding portion 57 and holds the button 11 of the operation member 10 on the operation member. The initial operation position Pa in the middle of the operation area of 10. In addition, in this initial state, the engaging end portion 56B of the hook lever 56 is engaged with the initial position Ga of the cam groove 55, and therefore, it is held at the initial operation position Pa against the elastic pushing force of the first spring 51. The actuating member is caused by the elastic force of the second spring 52. The 20th position is at the initial operating position Qa (moved to the outermost position).

That is, since the engaging end portion 56B of the hook lever 56 is engaged with the initial position Ga of the cam groove 55, the engaging end portion 56B of the hook lever 56 is positioned on one side (in FIG. 4). (Referring to the lower side), the engaging end portion 56B is engaged with the operation holding portion 57 to maintain the operation member 10 at the initial operation position Pa.

Next, the button 11 of the operation member 10 is pushed in from the initial state, so that it is moved to the first operation state shown in FIGS. 6 and 7. In this first operation state, the abutting projection 12 of the operation member 10 is brought into contact with the actuating member 20 to apply a pressing force, so that the engaging end portion 56B of the hook lever 56 will follow the first of the cam groove 55. The path Rb moves. Thereby, the engaging end portion 56B moves from the initial position Ga in a direction inclined to the operation line X, and then moves in a direction parallel to the operation line X to reach the first guide position Gb, and the actuating member 20 will Move to the first operating position Qb (one of the operating ends on the pressing side, the position shifted most inward).

By determining the position of the operating member 20 as described above, the position of the first operation position Pb of the operation member 10 is determined. When the first guide position Gb is compared with the initial state, the engagement end portion 56B swings to the other side (refer to the upper side in the sixth figure), so that the engagement end portion 56B of the hook lever 56 reaches the slave operation holding portion. 57 disengaged position. In addition, by continuing to press the button 11, the first operation state is maintained.

Next, by releasing the pressing force on the button 11 of the operation member 10, the switch is moved to the second position shown in FIGS. 8 and 9 by pressing the switch. Operation status. In this second operation state, the engagement end portion 56B of the hook lever 56 has been disengaged from the operation holding portion 57, so that the operation member 10 is moved to the second operation position Pc by the elastic pushing force of the first spring 51. In addition, since the engaging end portion 56B of the hook lever 56 moves from the first guide position Gb along the second path Rc to the second guide position Gc to engage with the operation holding portion 55A, the operation member 20 resists The elastic force of the second spring 52 is held at the second operation position Qc (an example of the operation intermediate position).

That is, the operating member 10 protrudes to a position where the engaging end portion 56B of the hook lever 56 abuts on the abutment surface 16Bt on the inner surface of the end portion of the guide opening portion 16B of the second hole portion 16 of the slider 13, and the protrusion The position system is formed as a second operation position Pc. In addition, by engaging the engaging end portion 56B of the hook lever 56 with the operation holding portion 55A of the cam groove 55, the hook lever 56 reaches the second guide position Gc, and the operating member 20 is maintained at the second operation position Qc. . As described above, the protruding position of the operation member 10 is determined as the second operation position Pc by abutting the engagement end portion 56B of the hook lever 56 on the abutment surface 16Bt. In addition, since the engaging end portion 56B is located inside the guide opening portion 16B, the hook lever 56 (engaging member) is restricted from swinging. For example, even when a load such as vibration is applied from the outside, There is a disadvantage that the engagement end portion 56B is oscillated, and the engagement end portion 56B can be prevented from being disengaged from the operation holding portion 55A.

Next, the button 11 of the operation member 10 is pushed in from the second operation state to move it to the third operation state shown in FIGS. 10 and 11. In this third operating state, the operating member 10 is The abutting projection 12 comes into contact with the actuating member 20 to apply a pressing force. Therefore, the engaging end portion 56B of the hook lever 56 is disengaged from the actuating holding portion 55A with the actuation of the actuating member 20, and is guided by the second guide. The position Gc moves along the third path Rd, the engaging end portion 56B reaches the third guide position Gd, and the actuating member 20 moves to the third actuating position Qd.

By determining the position of the operating member 20 as described above, the third operation position Pd of the operation member 10 is also determined. By continuing to press the button 11, the third operation state is maintained, and the engaging end portion 56B of the hook lever 56 is displaced toward one side (refer to the lower side in FIG. 10), so it will reach A position capable of engaging with the operation holding portion 57.

Next, when the operation force for pushing in the button 11 of the operation member 10 is released, the operation member 10 is moved in the protruding direction by the elastic pushing force of the first spring 51, and when the operation is performed, the hook lever is moved. The engaging end portion 56B of 56 is moved from the third guide position Gd along the fourth path Re. The engaging end portion 56B is engaged with the operation holding portion 57 so that the operation member 10 is held at the initial operation position Pa. In addition, the operating member 20 is displaced to the initial operating position Qa by the elastic pushing force of the second spring 52. This state is the initial state previously described.

As described above, in the pressing-open relationship of the present invention, the operating member 10 is repeatedly pushed in to cause the operating member 10 to change in the following order: the initial operating position Pa, the first operating position Pb, and the second operating position Pc. 3rd operation position Pd. The actuating member 20 interconnected with it changes in the following order: the initial actuating position Qa, the first actuating position Qb, the second actuating position Qc, and the third actuating position Qd.

This press-on relationship can be applied to a gas conditioner or the like, and a series of operations can be used to realize gas supply, ignition, and fire suppression. That is, with respect to a control device that controls the following structures: a solenoid valve that controls the supply of gas, and an ignition mechanism that controls the ignition of gas, it is a signal that detects the potentials of the three rows of conducting sections of the switch section 40 The system is connected to the control device. Thereby, when the push switch position is in the initial state, the operating member 10 will be held in the middle of the operating area, and the user can recognize the fire extinguishing by isolating the gas supply from the position of the button 11 of the operating member 10 status.

When the button 11 of the operating member 10 is pushed in from the initial state to the first operating state, gas is supplied and ignition can be performed. When the press-in operation of the operating member is released after the ignition is performed, the operation is shifted to the second operation state, and the gas can be continuously supplied while the control for the ignition is stopped. In this state, the operating member 10 will be in the most prominent state, and the user can recognize that the gas is burning in the gas conditioning appliance.

Next, by pressing the button 11 of the operating member 10 again to bring it to the third operation state, the holding of the actuating member 20 is released, and the gas is realized by releasing the pushing operation to the initial state. Fire. When the initial state is reached as described above, the protruding amount of the operation member 10 is restricted as described above, and the user can recognize that the gas is in a fire-extinguishing state.

As described above, in the push switch of the present invention, by repeatedly pressing the button 11 of the operation member 10, it is possible to easily The gas conditioner is controlled, and since the protruding amount of the operating member 10 is different from the initial state and the second operating state, the state of the switch unit 40 can be grasped from the protruding amount, which can avoid erroneous operation and achieve a good User affinity.

[Structure for uncomfortable operation of button]

In this push switch, for example, a situation may occur in which the push-in operation of the operation member 10 is released before the engagement end portion 56B reaches a position where it can be engaged with the operation holding portion 55A. In the above case, although the engaging end portion 56B of the hook lever 56 moves in the reverse direction in the first path Rb, the engaging end portion 56B cannot be reset to the position where it engages with the operation holding portion 57. It is also conceivable that This may result in poor reset.

Although the above-mentioned retrograde of the engagement end portion 56B is caused by an operator's unsuitable operation, the reason may also be that the step difference of the segment portion of the bottom surface of the cam groove 55 is small, so that the engagement end portion 56B is easy to move from the segment shape. Department detached. That is, even if the engaging end portion 56B reaches the first guide position Gb of the cam groove 55 by pressing the button 11 (the operating member 10), it is like when the force for pressing the button 11 is suddenly released. In the case where the actuating member 20 performs a protruding actuation at a high speed, a phenomenon in which the engaging end portion 56B jumps over the step portion may also occur, because the above-mentioned situation may also cause a poor reset.

In order to solve the above-mentioned shortcomings, a guide portion 16G is formed on the inner edge of the second hole portion 16 and has an inclined posture with respect to the operation line X system. The guide portion 16G is formed so as to be opposed to the operation in the first path Rb. The inclined portions of the straight line X are in a parallel posture. With the above-mentioned structure, when the pressing-in operation of the operating member 10 is released before the engaging end portion 56B reaches a position where it can be engaged with the actuating holding portion 55A, the engaging end portion 56B is positioned at the first position of the cam groove 55. When the first path Rb is retrograde, the guide portion 16G comes into contact with the engagement end portion 56B to reliably perform the operation of guiding the engagement end portion 56B to the operation holding portion 57.

That is, when the push-in operation of the button 11 of the operating member 10 is released halfway, the actuating member 20 is actuated in the protruding direction by the elastic force of the second spring 52, so the engaging end portion 56B is in the cam groove 55. The first path Rb will move in the retrograde direction. In addition, when the push-in operation of the button 11 of the operation member 10 is released halfway, the operation member 10 is moved in the direction of returning to the initial operation position Pa by the elastic pushing force of the first spring 51, as shown in FIG. 12 The guide portion 16G of the second hole portion 16 is generally brought into contact with the engagement end portion 56B.

Since the guide portion 16G is formed in an inclined posture with respect to the operation line X system as described above, the contact of the guide portion 16G with the engagement end portion 56B causes the engagement end portion 56B to move to The force of the direction in which the holding portion 57 is operated. As described above, as a result of the component force acting from the guide portion 16G, the hook lever 56 swings around the base end portion 56A, and when it reaches the initial position Ga of the cam groove 55, it performs well with the operation holding portion 57 The engagement does not cause a poor reset.

[Industrial availability]

The present invention can be used to perform a pressing operation on an operating member. The shape of the push switch.

Claims (7)

A push switch includes: an operating member that moves linearly along an operation by human operation; an actuating member that moves linearly along the operation by a pressing force from the operating member; and a switch portion that is formed in conjunction with the operating member A conducting state corresponding to the operating position of the housing; a housing for supporting the above-mentioned member, and including: a first ejection mechanism for ejecting the operation member in a direction protruding from the housing; and a second ejection mechanism for the operation The actuating member is pushed in a direction close to the operating member; the holding mechanism can hold the operating member in an operating intermediate position in the middle of the operating area, and can hold the operating member in the operating intermediate position in the middle of the operating area. The holding mechanism includes a heart-shaped cam groove formed in the actuating member, and an engagement member that engages the base end portion by the housing and engages the engagement end portion into the cam groove to engage the engagement. The end portion moves along the cam groove along with the reciprocating motion of the actuating member, and is configured to form an actuating holding portion at In the path of the cam groove, the operation holding portion is configured to hold the operation member at the operation intermediate position by engaging with the engagement end portion, and forms an operation holding portion at the operation member. The operation holding portion is In a state where the engagement end portion is swung to a position separated from the operation holding portion, the operation member is held at the operation intermediate position by engaging with the engagement end portion. According to the push switch described in item 1 of the scope of patent application, if the operating member is pushed to the operating end on the pressing side by pressing the operating member into the pressing member, and then the pressing operation is released, The engaging end portion of the engaging member is engaged with the operation holding portion to resist the elastic pushing force generated by the second elastic pushing mechanism, and the operation member is maintained at the intermediate position of the operation, and is accompanied by the next time When the actuating member is actuated by the press-in operation performed by the operation member, the engaging end portion is disengaged from the actuating holding portion by swinging, and when the press-in operation is released, the engagement is performed by The end is engaged with the operation holding portion to resist the elastic pushing force generated by the first elastic pushing mechanism, and maintains the operating member at the intermediate position of the operation. The push switch according to item 1 of the scope of patent application, wherein the housing has a storage space for accommodating the actuating member to reciprocate freely, and the cam is disposed along the cam along the actuating member in the accommodation space. The groove is formed on the outer wall surface with a first hole portion through which the engaging end portion of the engaging member can penetrate. The sliding system formed on the operating member is disposed at a position overlapping the outer side of the outer wall surface, and A second hole portion through which an engagement end portion of the engagement member penetrates is formed in the sliding body, and the operation holding portion is formed on an inner periphery of the second hole portion. The push switch described in item 2 of the scope of patent application, wherein the housing has a storage space for accommodating the actuating member to be reciprocated freely, and the cam is disposed along the cam along the actuating member in the accommodation space. The groove is formed on the outer wall surface with a first hole portion through which the engaging end portion of the engaging member can penetrate. The sliding system formed on the operating member is disposed at a position overlapping the outer side of the outer wall surface, and A second hole portion through which an engagement end portion of the engagement member penetrates is formed in the sliding body, and the operation holding portion is formed on an inner periphery of the second hole portion. According to the push switch described in item 3 of the scope of patent application, the cam groove has a first path for the engaging end portion located at an initial position corresponding to the operation holding portion, and accompanying the pressing of the operation member. The movement of the actuating member caused by the pressure moves along the inclined path portion inclined with the operation straight line; and the second path releases the pressing force when the engagement end portion reaches the moving end of the first path. At this time, the engaging end portion is moved to the operation holding portion with the movement of the operating member caused by the elastic pushing force of the second elastic pushing mechanism, and a guide portion is formed on the inner edge of the second hole portion, When the pressing force of the operation member is released before reaching a position where the engaging end portion can be moved to the operation holding portion, the operation member is moved in a protruding direction due to the elastic pushing force of the second elastic pushing mechanism, so that When the engaging end portion is moved in the inclined path portion of the first path, the operation member is returned with the return of the operation member by the elastic pushing force of the first elastic pushing mechanism. The operating force to the intermediate position of the actuator in contact with the engaging end portion of the contact by engagement of the end effectors have the card toward the direction of the initial position. The push switch according to item 3 of the scope of patent application, wherein the second hole portion includes a slit-shaped guide opening portion, and the engagement end portion reaches a position where the engagement end portion can be engaged with the operation holding portion. Canceling the pressing operation of the operation member, when the operation member is moved in the protruding direction due to the elastic pushing force of the first elastic pushing mechanism, the engagement end portion is allowed to relatively move with respect to the operation member, and An abutment surface is formed on the inner surface of the end portion on the extension side of the guide opening portion to abut the engagement end portion to determine a limit position of the protruding direction of the operation member. The opening width of the guide opening portion is The value is set to limit the swing of the engaging member. The push switch according to any one of claims 1 to 6, wherein the switch unit includes a movable contact that moves integrally with the actuating member, and a movable contact supported by the housing and connected to the aforementioned It consists of fixed contacts that the movable contact contacts.