JP4931534B2 - Two-stage switch device - Google Patents

Description

  The present invention relates to a two-stage switch device capable of operating two switches with one operation unit.

  As an example of a two-stage switch device that can operate two switches with a single operation unit, Patent Document 1 discloses an operation switch that is used to open and close an air supply tube and a water supply tube of an electronic endoscope device. In this operation switch, when the push button is lightly pressed, the first piston body biased by the first spring member is pushed down, and the air supply switch (electric switch) is turned on at the tip of the first piston body. Is done. When the push button is further pushed in and the second piston body biased by the second spring member is moved by a predetermined stroke, a water supply switch (electric switch) is formed at the tip of the second piston body. Turned on.

JP-A-11-32980

In the operation switch of Patent Document 1, the stroke of the second piston body biased by the second spring member is set longer than the stroke of the first piston body biased by the first spring member. Therefore, it is unlikely that the water supply switch is turned on at the tip of the second piston body unintentionally after the air supply switch is turned on at the tip of the first piston body. Since the piston and the two springs are arranged in series, the height of the switch itself becomes large, and there is a problem that the size cannot be reduced. Moreover, it was difficult to understand the clear difference in the force of pressing the button when operating the air supply switch and the water supply switch. An object of the present invention is to provide a two-stage switch device that reduces the size of the switch itself and makes clear the difference in pressing force when the first switch and the second switch are operated. It is.

Two-step switch device according to claim 1, moves between a housing having a first housing and a lower portion of the second housing at the top, the inside of the first housing, the push position below the initial position and the initial position While the possible operation unit and the operation unit move from the initial position to the push-in position, first and second urging forces that differ in stages according to the movement distance of the operation unit are generated, and the operation unit is set to the initial position. An urging unit that urges in the direction of travel; a first switch unit that operates in accordance with the movement of the operation unit against the first urging force; and a second switch unit that is different from the first switch unit. A two-stage switch device including a second switch unit that operates in accordance with the movement of the operation unit against the second urging force, wherein the urging unit is disposed in contact with the operation unit, Moves from the initial position to an intermediate position between the initial position and the push-in position The deformed in the moving direction, a first compression coil spring caused the first biasing force that is proportional to the moving distance of the operation portion, a second compression coil spring which is independent of the first compression coil spring, the operating unit While moving between the initial position and the intermediate position, it is separated from the operation unit, and is arranged so as to contact the operation unit when the operation unit reaches the intermediate position, and the operation unit moves from the intermediate position to the pushing position. during, in cooperation with the first compression coil spring, and a second compression coil spring caused the second urging force that is proportional to the moving distance of the operating unit, the first compression coil spring, the second compression coil spring Internally arranged in parallel to each other with respect to the movement direction between the initial position and the pushing position of the operation portion , the first switch portion is provided in the magnet provided in the operation portion and the second housing. Magneto-electric conversion element When the first compression coil spring is compressed and the magnet comes close to the magnetoelectric transducer, it is turned on, and the second switch part has a tact switch installed in the second housing, a first compression coil spring and the second compression coil spring is compressed, the lower end portion of the operation portion is characterized Rukoto, to on-operation when pressing the tact switch with.

  According to the first aspect of the present invention, since the first elastic member and the second elastic member are arranged in parallel to each other with respect to the moving direction between the initial position and the pushing position of the operation portion, 2 Miniaturization of the stage switch device can be promoted.

In the space provided for the movement of the operation portion, it is possible to house the first elastic member, capable of promoting miniaturization of the two-stage switching device. Further, the position of the operation unit can be estimated sensuously according to the force of pressing the operation unit.

Since the operation unit is a force pushing the operating portion by the urging force of the second elastic member when reaching the intermediate position is rapidly increased, the operation unit has reached the intermediate position, i.e., the first switch portion It can be sensuously estimated that the second switch part is in operation and is not in operation.

The structure of the first elastic member can be simplified and the manufacturing cost can be reduced. Moreover, since the force which pushes an operation part increases in proportion to distance, the position of an operation part can be estimated still more sensuously.

The structure of the second elastic member can be simplified and the manufacturing cost can be reduced. Moreover, since the force which pushes an operation part increases in proportion to distance, the position of an operation part can be estimated still more sensuously.

The first elastic member includes a first compression coil spring which is deformed in the moving direction of the operation portion, the second elastic member, because it includes a second compression coil spring which is deformed in the moving direction of the operation unit, the The structure of the first elastic member and the second elastic member can be simplified, the manufacturing cost can be reduced, and the size of the two-stage switch device can be reduced both in the moving direction of the operation unit and in the direction perpendicular to the moving direction, Furthermore, when the operating portion is between the initial position and the intermediate position, the force pushing the operating portion changes in proportion to the distance by the first compression coil spring, and when the operating portion is at the intermediate position, the first compression coil spring And the second compression coil spring, the pressing force increases rapidly, and when it is between the intermediate position and the pressing position, the pressing force of the operating part increases in proportion to the distance. It is possible to guess more sensuously.

Since the first compression coil spring is disposed inside the second compression coil spring, space saving can be achieved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. Corresponding components are denoted by common reference symbols throughout the drawings. FIG. 1 is a sectional view of a two-stage switch device 60 according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating a movement position of the operation unit 2 of the two-stage switch device 60 according to the first embodiment of the present invention. In FIG. 2, the elastic member is omitted in order to clarify the moving position.

The two-stage switch device 60 includes an operation unit 2 that can move between an initial position A and a pushing position C, and a moving distance of the operation unit 2 while the operation unit 2 moves from the initial position A to the pushing position C. Accordingly, the first and second urging forces that differ in stages are generated, and the urging unit that urges the operation unit 2 in the direction toward the initial position A and the movement of the operation unit 2 that resists the first urging force. to the first switch (first switch section) 5 that with operation, the first switch portion 5 a different second switch (second switch section) 6, anti the second biasing force you assume the second switch 6 and the two-step switch device 60 comprising a operating with the movement of the operation unit 2 to. In this embodiment, the two-step switch device 60, have a housing 1, the housing 1 includes a first housing 9 of the upper, you have a second housing 10 of the lower. Further, the first switch 5 includes a combination of a magnet 7 and a Hall element (magnetoelectric conversion element) 8. By pressing the operating unit 2 shallowly and bringing the magnet 7 in the operating unit 2 close to the Hall element 8 of the second housing 10, the voltage value from the Hall element 8 changes, and the operating unit 2 is pressed. (That is, the first switch 5 is turned on).

The second switch 6 is a tact switch installed in the second housing 10. After the first switch 5 is turned ON, the press deeper the operating unit 2, by pressing the operation portion 2 ye transfected switch, the second switch 6 is turned ON. Then, the biasing portion, while the operating unit 2 is moved from the initial position A to the intermediate position B between the initial position A and the depressed position C, the first elastic member to produce a first biasing force (first a first compression coil spring 3), a second elastic member which is independent first elastic member or, et al., while the operating unit 2 is moved from the intermediate position B to the depressed position C, the first elastic portion obtain Bei a second elastic member to produce a second biasing force to wood and cooperate (the second compression coil spring 4). The first elastic member and the second elastic member, compared moving direction between the initial position A and the depressed position C of the operation portion 2, are arranged in parallel with each other. Incidentally, the first elastic member and the second elastic member may be arranged side by side, it may be a plurality of first elastic member is disposed on both sides of the second elastic member, and vice versa a plurality of second elastic members may be disposed on opposite sides of the first elastic member. Further, inside the first elastic member may have a second elastic member is arranged, may be inside the second elastic member is a first resilient member disposed vice versa. The first elastic member, while the operating unit 2 is moved from the initial position A to the depressed position C, to produce an amount of deformation corresponding to the distance between the initial position A and the depressed position C, the operation section 2 It is arranged in contact with. The second elastic member is, while the operating unit 2 is moved between the initial position A and the intermediate position B spaced from the operating unit 2, the operation unit when the operation unit 2 has reached the intermediate position B Ru is placed in contact with 2 Tei. Specifically, the second elastic member is arranged to urge the slider 11 to the step portion of the first housing 9. The first elastic member, while the operating unit 2 is moved from the initial position A to the intermediate position B, including a spring to produce a first biasing force that is proportional to the moving distance. The second elastic member, while the operating unit 2 is moved from the intermediate position B to the depressed position C, and then the first elastic member and the cooperating, produces a second biasing force that is proportional to the moving distance including the spring. In this embodiment, the first elastic member includes has a first diameter and a first free length includes a first compression coil spring 3 which deform the moving direction of the operation unit 2, the second resilient portion wood is greater than the first diameter second diameter and the first shorter than the free length second free length and the second compression coil spring 4 including deforming the moving direction of the operation section 2 has a. The first compression coil spring 3 is disposed inside the second compression coil spring 4. In this embodiment, the first elastic member and the second elastic member are configured as the compression coil springs 3 and 4, but other types of springs such as a tension spring, a torsion spring, and a disc spring are used instead of the compression coil springs. May be used.

The operation of the two-stage switch device 60 of the present embodiment will be described . First, when the operation unit 2 is pushed from the state shown in FIGS. 1 and 2, the second compression coil spring 4 remains unchanged, and only the first compression coil spring 3 is compressed. Be made. As the operation unit 2 approaches the slider 11, the magnet 7 also approaches the Hall element 8. As a result, the voltage value of the Hall element 8 is changed, and it is detected that the operation unit 2 is pressed, and a signal is output from the Hall element 8, whereby the first switch 5 is turned ON. When the operation unit 2 is further pushed down, the operation unit 2 comes into contact with the slider 11. When the operation unit 2 is further pushed down, both the second compression coil spring 4 and the first compression coil spring 3 are contracted, and the tip of the operation unit 2 presses the second switch 6 to output a signal, The second switch is turned on. As described above, since a clear difference occurs in the force of pressing the operation unit 2 when the first switch 5 and the second switch 6 are operated, it is possible to prevent the second switch 6 from being accidentally pressed, Since the height of the switch itself can be reduced , the two-stage switch device 60 can be reduced in size. Further, two-step switch device 60 because it has a slider 11, it is possible to prevent Rutotomoni can push down the second compression coil spring 4 securely, and the second compression coil spring 4 the interference of the first compression coil spring 3 . Since the structure of the first compression coil spring 3 and the second compression coil spring 4 can be simplified, the manufacturing cost can be reduced, and the dimensions of the two-stage switch device 60 can be reduced both in the direction of movement of the operation unit and in the direction perpendicular to the direction of movement. Ru can be reduced. Furthermore, until the operation unit 2 reaches the intermediate position B from the initial position A, the force pushing the operation unit 2 changes in proportion to the moving distance of the operation unit 2 by the first compression coil spring 3, When the position B is reached , the pressing force increases rapidly due to the cooperation of the first compression coil spring 3 and the second compression coil spring 4, and when the operation unit 2 is between the intermediate position B and the push-in position C, the operation unit 2 Since the force of pushing increases in proportion to the distance, it is possible to more intuitively estimate the position of the operation unit 2.

Further, by making the cross section of the second compression coil spring 4 in a rectangular shape, it is possible to increase the cross-sectional area of the spring, the spring constant of the second compression coil spring 4 is increased, needed to depress the spring The power can be increased. As a result, the difference between the force when the first compression coil spring 3 is pushed down and the force when the second compression coil spring 4 and the first compression coil spring 3 are pushed together is further clarified. Can be prevented more reliably.

FIG. 3 shows a two-stage switch device 70 according to the second embodiment of the present invention. 3A shows a cross-sectional view of the two-stage switch device 70, FIG. 3B shows a partial perspective view of the two-stage switch device 70, and FIG. 3C shows the state shown in FIG. FIG. 4 is a cross-sectional view taken along line AA of the two-stage switch device 70. Two-step switch device 70, the second elastic member is a leaf spring 12, except that it does not have a slider 11, having substantially the same configuration as the two-step switch device 60 in the first embodiment . Accordingly, corresponding constituent elements are denoted by common reference numerals and description thereof is omitted.

In two-step switch device 70 of this embodiment, the second elastic member, while the operating unit 2 is moved from the intermediate position B to the depressed position C, and then the first elastic member cooperating with the mobile It includes a spring 12 that produces a second biasing force that is not proportional to the distance. Furthermore, the first elastic member comprises a compression coil spring 3 which deform the operation unit 2 to the moving direction, the second elastic member may be distributed around the compression coil spring 3, the operation unit 2 It includes a plurality of leaf springs 12 that are individually deformed in a direction crossing the moving direction. In the present embodiment, there are four leaf springs 12, and the four leaf springs 12 are arranged on the outer peripheral wall of the first housing 9 with an interval of about 90 ° as shown in FIG. The first housing 9 protrudes from the outer peripheral wall of the first housing 9 into the first housing 9 .

The operation of the two-stage switch device 70 of this embodiment will be described. First, when the operation unit 2 is pushed from the state of FIG. 3A , the leaf spring 12 is not deformed, and only the first compression coil spring 3 is compressed. As the operation unit 2 approaches the leaf spring 12, the magnet 7 also approaches the Hall element 8. As a result, the voltage value of the Hall element 8 is changed, and it is detected that the operation unit 2 is pressed, and a signal is output from the Hall element 8, whereby the first switch 5 is turned ON. When further pushing down the operating portion 2, the operating portion 2 come into contact with the leaf spring 12, further pushes down the operation section 2, the leaf spring 12 by the operation unit 2, the inner circumferential surface direction of the first housing 9 modified with the canceller, the first compression coil spring 3 is Ru allowed to compress. Further Ru depressing the operating portion 2, the distal end of the operation portion 2 presses the second switch 6, by which the signal is output, the second switch is turned ON. In the present embodiment, the structure of the first compression coil spring 3 can be simplified, and the manufacturing cost can be reduced. Incidentally, the leaf spring 12 may press pressure anything as long as it can rapidly increases stepwise, shape, it is possible to increase the number and arrangement of the choices. Furthermore, in the period from the initial position to the intermediate position, the force pushing the operation portion 2 is proportional to the moving distance, between the intermediate position to the depressed position, will be increased to not proportional to the moving distance, It can be sensuously estimated that the operation unit 2 is between the intermediate position and the push-in position. Further, the interference between the first compression coil spring 3 and the leaf spring 12 can be surely eliminated.

Then as an example of a two-step switch device 60 of the present invention, illustrating the electronic endoscope apparatus 100 using the two-step switch device 60 of the present invention. FIG. 4 shows a part of an electronic endoscope apparatus 100 using the two-stage switch device 60 of the present invention. The electronic endoscope apparatus 100 includes a distal end portion 100A having a CCD, an insertion portion 100B, and an operation portion 100C. The operation unit 100C is provided with a two-stage switch device 60 of the present invention that operates opening and closing of an air supply pipe (not shown) and a water supply pipe 118. The ON / OFF signal of the two-stage switch device 60 is sent to a control circuit (not shown), and the air supply pipe (not shown) and the water supply pipe 118 are opened and closed.

It is sectional drawing of the two-stage switch apparatus of 1st embodiment. It is a figure which shows the movement position of the operation part 2 of the two step switch apparatus of 1st embodiment. It is a 2 step | paragraph switch apparatus of 2nd embodiment. (A) is sectional drawing of a two-stage switch apparatus, (b) is a perspective view of a two-stage switch apparatus, (c) is sectional drawing along the AA line of (a). . 1 is a partial cross-sectional view of a part of an electronic endoscope apparatus using a two-stage switch device of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Operation part 3 1st compression coil spring 4 2nd compression coil spring 5 1st switch 6 2nd switch 7 Magnet 8 Hall element 9 1st housing 10 2nd housing 11 Slider 12 Leaf spring 60 2 steps Switch device

Claims (1)

A housing having an upper first housing and a lower second housing;
Within said first housing, an operating portion movable between a depressed position below the initial position and the initial position,
While the operation unit moves from the initial position to the push-in position, first and second urging forces that differ in stages according to the movement distance of the operation unit are generated, and the operation unit is moved to the initial position. An urging section for urging in the direction toward
A first switch portion that operates in accordance with the movement of the operation portion against the first urging force;
The first switch portion and a second switch portion which is different in two-step switch device having a second switch unit which operates in accordance with the movement of the operating part against the urging force of the second There ,
The biasing part is
The operation unit is disposed in contact with the operation unit, and is deformed in the movement direction while the operation unit moves from the initial position to an intermediate position between the initial position and the pushing position, and the movement distance of the operation unit A first compression coil spring that produces the first biasing force proportional to
A second compression coil spring which is independent of the first compression coil spring, while the operating part is moved between the intermediate position and the initial position spaced from the operating unit, the operating portion between intermediate Arranged so as to come into contact with the operation portion when reaching the position, and while the operation portion moves from the intermediate position to the push-in position, in cooperation with the first compression coil spring , A second compression coil spring that generates the second urging force proportional to the moving distance ,
The first compression coil springs are arranged in parallel to each other with respect to the movement direction between the initial position and the push-in position of the operation portion inside the second compression coil spring ,
The first switch part includes a magnet provided in the operation part and a magnetoelectric conversion element provided in the second housing, and the first compression coil spring is compressed by the pushing of the operation part. When the magnet is close to the magnetoelectric transducer, it is turned on,
The second switch unit includes a tact switch installed in the second housing, and the first compression coil spring and the second compression coil spring are compressed by the pushing of the operation unit, When the lower end portion of the operation unit presses the tact switch-on operation to Rukoto, two-step switch device according to claim.

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