JP2000188040A - Switch mechanism - Google Patents

Abstract

(57) [Problem] To provide a switch mechanism which is simple in structure and can be turned on / off while generating a click feeling. A case (20), switch terminal plates (150, 160) attached to the case (20) and provided with contact portions (151, 161), a support shaft (170) electrically connected to the switch terminal plate (150), and a support shaft (170). A contact plate 4 which is swingably mounted and provided with a pair of contacts 47 and 49.
0 and the cam body 50 that is swingably attached to the support shaft 170.
And the cam body 5 attached between the cam body 50 and the contact plate 40.
A resilient means 60 for repelling the contact plate 40 to rotate right or left (that is, in the opposite direction) when 0 is rotated left or right.
And a driving member 70 having an engaging portion 75 that engages with the engaging portion 53 of the cam body 50 and swings the cam body 50.
By engaging the engaging portion 75 with the engaging portion 53 and swinging the cam body 50, the contact plate 40 is simultaneously swung in the opposite direction, and
The contact 47 or 49 is brought into contact with 51 or 161.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch mechanism having a structure that generates a click sensation when being turned on or off.

[0002]

2. Description of the Related Art Conventionally, some switch mechanisms include FIG.
The switch 200 is turned on in the state shown in FIG.
Is rotated counterclockwise so that the predetermined position 201 of the knob 200 becomes the predetermined position 22 of the case 220 as shown in FIG.
In addition to the structure in which a click sensation is generated upon reaching 3 and the switch is turned off from on and cannot be rotated further to the left, or the structure in which the switch is turned on from off and cannot be further rotated to the left. There was something.

In this type of switch mechanism, for example, a variable resistor or a code switch is separately attached to the rotary shaft of the knob 200, and the switch mechanism is used as a power switch, and the rotary shaft is rotated to change the resistance or the code. By changing the pattern, for example, adjusting the volume of the audio device, the position 201 of the knob 200 and the position 2 of the case 220 are adjusted.
It is used to turn off the power of the device itself by matching 23.

[0004]

However, there is no conventional switch mechanism having a simple structure.

In the case where the on / off state is reversed, the parts have to be provided as separate parts, so that the number of parts is increased, which hinders a reduction in manufacturing cost.

The present invention has been made in view of the above points, and an object of the present invention is to provide a switch mechanism which has a simple structure and can switch on and off while reliably generating a click feeling.

Another object of the present invention is to provide a switch mechanism capable of reducing the number of parts and manufacturing cost by adopting a structure that can share the parts even when the on / off state is reversed. To provide.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, a switch mechanism according to the present invention comprises a case, a pair of switch terminal plates attached to the case, and an electrical connection with one of the switch terminal plates. A contact plate provided with a support shaft protruding from the case and a pair of contacts that are attached to the support shaft so as to be swingable and contact the contact portions respectively provided on the pair of switch terminal plates when swinging left and right. A cam body swingably attached to the support shaft, and a contact body attached between the cam body and the contact plate, when the cam body is turned left, the contact plate is turned right and the cam body is turned right. The contact plate has a resilient means for resiliently rotating to the left when rotated, and an engaging portion for engaging the engaging portion provided on the cam body to swing the cam body right and left. A driving member, wherein the engagement portion of the driving member is engaged with a cam body. The contact body is swung to the left or right by engaging with the contact portion, and simultaneously the contact plate is swung in the opposite direction to bring the contact into contact with the contact portion of any of the switch terminal plates. I do. Further, the contact portions of the pair of switch terminal plates are installed at positions symmetrical with respect to a line connecting the center point between the two contact portions and the support shaft. In addition, a support shaft mounting portion is provided on one of the switch terminal plates, the support shaft is mounted on the support shaft mounting portion, and a switch is determined depending on which switch terminal plate is provided with the support shaft mounting portion. Is characterized by reversing the on / off state.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic side sectional view showing a switch with a variable resistor using a switch mechanism according to the present invention as a power switch. As shown in the figure, the switch with a variable resistor is provided with a switch mechanism 1 from below.
0, variable resistor 90, click mechanism 100,
These members are configured to rotate simultaneously by rotating the shaft 120. Hereinafter, the structures of the variable resistor 90 and the click mechanism 100 will be briefly described, and then the structure of the switch mechanism 10 will be described in detail.

[0010] The click mechanism 100 includes a rotary object 101 attached so as to rotate integrally with the shaft 120,
Click plate 1 attached to the upper surface of rotary mold 101
03, and a ring-shaped uneven portion 123 provided on the lower surface of the upper case 121 that rotatably supports the shaft 120. The rotary object 101 is the upper case 1
30 are stored in the upper storage section 131.

The variable resistor 90 includes a flexible board 91 which is insert-molded on the bottom surface of the lower housing portion 133 of the upper case 130 so that the resistor pattern surface is exposed.
The flexible board 91 is provided with a rotary member 95 to which a slider plate 93 that is in sliding contact with the resistor pattern is fixed. A metal terminal 97 protrudes from the flexible substrate 91, and the rotatable object 95 and the rotatable object 10.
1 is engaged at the center so as to rotate together.

FIG. 2 is an exploded perspective view of a main part of the switch mechanism 10. As shown in FIG. 1, the switch mechanism 10 includes a case 20 in which a pair of switch terminal plates 150 and 160 are insert-molded and a support shaft 170 is fixed, a contact plate 40 and a cam body 50 and a spring housed in the case 20. It comprises an emitting means 60, a driving member 70, and an upper case 80 attached so as to cover the case 20.

FIG. 3 is a perspective view showing a pair of switch terminal plates 150 and 160 which are insert-molded in the case 20. As shown in FIG. As shown in FIG.
The metal plates 50 and 160 are also formed by cutting and bending a metal plate into a predetermined shape, and tongue-shaped contact portions 151 and 1 are provided at opposing positions inside the center of the substantially U-shaped cut portion.
61 are provided. Also, both switch terminal plates 150,
160 has terminal portions 153 and 163 protruding to the outside. A support shaft mounting portion 155 protruding in a rectangular shape is provided at the base of one terminal portion 153, and a through hole 157 is provided therein. Is formed. Portions of the two switch terminal plates 150 and 160 other than the support shaft mounting portion 155 are formed in line-symmetric shapes.

The case 20 shown in FIG. 4 is completed by molding the case 20 by sandwiching the switch contact plates 150 and 160 at the positions shown in FIG.

As shown in FIG. 4, the case 20 has a substantially rectangular shape, a concave storage portion 21 is provided at the center thereof, a circular through hole 23 is formed at the center thereof, and a tongue piece is provided above the through hole 23. A contact plate support plate 25 projecting in the shape of
3, a through hole 27 is provided below the switch terminal plates 150, 1 at opposing positions near both side walls of the storage section 21.
The contact portions 151 and 161 are exposed, and both terminal portions 153 and 163 protrude from the lower outer wall. The through hole 157 of the switch terminal plate 150 is exposed in the through hole 27. 29 is a mounting hole and 31 is a mounting projection. The support shaft 170 is inserted into the through hole 157.
If the lower projection 171 is inserted and swaged on the back side of the through hole 157, the case 2 with the support shaft 170 shown in FIG.
0 is completed.

Returning to FIG. 2, the contact plate 40 is made of a metal plate, has an opening 41 in the center, and has a support shaft 1 at one end.
A supporting hole 43 for rotatably inserting the locking member 70 is provided, and an insertion hole 45 for rotatably inserting a locking piece 63 provided on the below-described resilient means 60 is provided at the other end. A pair of contact points 47 and 49 are provided which are bent downward and are provided on opposite sides of the bent opposing portions to protrude outward.

Next, the cam body 50 is a molded product of a synthetic resin, and is formed in a substantially fan-shaped flat plate as shown in FIGS. 2 and 5, and the support shaft 170 is rotatably penetrated at the base thereof. A mounting hole 53 is formed, and a concave engaging portion 53 is formed in the center of the arc-shaped portion of the surface thereof. A locking hole 55 for rotatably locking a locking piece 65 provided on the resilient means 60 is provided.

Next, the resilient means 60 is formed at the end of a wound portion 61 formed by winding a metal bar made of a spring material into a coil shape, and one end of the wound portion 61 is pulled out and then bent downward. It is composed of a locking piece 63 and a locking piece 65 formed at the end by pulling out the other end of the winding part 61 and then bending it upward.

Next, the driving member 70 is an integrally molded product of a synthetic resin, and the ring-shaped flat plate portion 7 is formed on the upper surface of the cylindrical shaft portion 71.
3 and an engaging portion 75 is provided so as to protrude downward from the outer periphery thereof. Reference numeral 77 denotes an engaging portion for engaging with the rotary mold 95 shown in FIG. 1 and rotating integrally therewith. Reference numeral 78 denotes a step formed by reducing the outer diameter of the lower end of the shaft 71.

The upper case 80 is a molded product of a synthetic resin,
It has a rectangular shape and is provided with a storage portion 81 on the lower surface thereof and a through hole 83 at the center thereof. 85,85
Is a through-hole through which a fixing member (not shown) coincides with the mounting hole 29 provided in the case 20.

In order to assemble the switch mechanism 10, the housing 21 of the case 20 to which the support shaft 170 is fixed is mounted.
The contact plate 40 is stored in the support hole 43 and the support shaft 170 is
Is rotatably inserted. Next, the support shaft 170 is connected to the cam body 50.
Of the spring means 60 is inserted into the insertion hole 45 from above the contact plate 40, and at the same time, the other engagement piece 65 is inserted into the cam body 50. From the lower side into the locking hole 55 (see FIG. 5).

Then, the driving member 70 is inserted from above, the shaft 71 is passed through the opening 41 of the contact plate 40, and the step 78 is rotatably locked in the through hole 23 of the case 20,
By further covering the upper case 80, the switch mechanism 10 is completed.

The switch mechanism 10 is mounted below the variable resistor 90 shown in FIG. 1 as described above, and a lower plate 180 is mounted on the lower surface thereof, and each member is integrated by fixing means (not shown).

Next, the operation of the switch with a variable resistor will be described. That is, when the shaft 120 is rotated, the rotary mold 101, the rotary mold 95, and the driving member 70 are simultaneously rotated, whereby the click plate 103 and the ring-shaped uneven portion 1 are rotated.
At the same time, a desired click feeling is generated by the slider 23, and at the same time, the slider plate 93 slides on the resistor pattern of the flexible substrate 91 to change the resistance value between the plurality of terminals 97. The shaft 120 is rotated by, for example, 270 ° by a stopper mechanism (not shown), but the engaging portion 75 of the driving member 70 shown in FIG. By engaging the engaging portion 53 and rotating it, the switch terminal plates 150 and 160 are turned off (or turned on) while generating a great click feeling. That is, specifically, for example, the switch with a variable resistor is used as a volume with an on / off switch of an electronic device, and the volume of a speaker of the electronic device is adjusted by the variable resistor 90, and the switch mechanism 10 is controlled by the variable resistor 90. Turn the power on and off.

The operation of the switch mechanism 10 will now be described in detail. FIG. 6 shows the contact plate 4 in the switch mechanism 10.
FIG. 9 is an operation explanatory diagram showing a relationship among a reference numeral 0, a cam body 50, a resilient means 60, and an engaging portion 75 of a driving member 70. FIG. 7 is an operation explanatory view showing the relationship among the switch terminal plates 150 and 160, the contact plate 40, the cam body 50, and the engaging portion 75 in the switch mechanism 10, and FIG. ), And FIG. 7B corresponds to the state of FIG.

As shown in FIG. 6A, the engaging portion 75 of the driving member 70 is indicated by a dotted line, and the moving range M of the engaging portion 75 is indicated by a dotted arrow. That is, the engagement portion 75 is approximately 270
The cam body 50 is configured to rotate and engage with the engaging portion 53 of the cam body 50 near one stop position in the movement range M.

On the other hand, both the cam body 50 and the contact plate 40 are rotatably mounted on a support shaft 170, and both are engaged by a resilient means 60 with a locking hole 55 (see FIG. 5) and an insertion hole 45. In the state shown in FIG. 6A, the right side wall 57 of the cam body 50 inclined to the right is resiliently pressed against the inner side wall of the upper case 80 (not shown). It comes into contact and stably stops at that position. At this time, since the locking hole 55 is on the right side of the center line L,
The contact plate 40 is repelled so that the insertion hole 45 is farthest from the locking hole 55 and comes to the left of the center line L. That is, the contact plate 40 is tilted leftward about the support shaft 170.

In this state, since the left contact 47 of the contact plate 40 is in contact with the contact portion 151 of the left switch terminal plate 150 with a predetermined elastic force as shown in FIG. The space between both switch terminal plates 150 and 160 is off.

Next, the driving member 70 is rotated to
5A is rotated clockwise from the position shown in FIG. 6A, the cam body 50 is rotated leftward by the engagement of the engaging portion 75 and the engaging portion 53, and the locking hole 55 is moved to the center line L. After the spring means 60 has passed the most contracted state by exceeding
The left side wall 58 of the “0” abuts on the inner side wall of the upper case 80 (not shown) with elasticity and stably stops at that position. As a result, as shown in FIG.
(See FIG. 5) comes to the left of the center line L,
Is repelled so that the insertion hole 45 is farthest from the locking hole 55 and comes to the right of the center line L. That is, the contact plate 40 rotates rightward about the support shaft 170.

In this state, as shown in FIG. 7B, the right contact 49 of the contact plate 40 abuts on the contact portion 161 of the right switch terminal plate 160 with a predetermined elastic force, and both switch terminals are switched. The plates 150 and 160 are turned on via the metal contact plate 40 and the support shaft 170.

When the drive member 70 is rotated clockwise as it is, the engagement between the engagement portion 75 and the engagement portion 53 is released, and the drive member 70 rotates to the opposite stop position by a stopper (not shown). Then, when the engaging portion 75 engages with the engaging portion 53 by rotating (turning counterclockwise) in the opposite direction again, the cam body 50 returns to the state of FIGS. 6A and 7A and is turned off. . When the cam body 50 is rotated, a click sensation occurs due to the resilience of the resilient means 60.

In the above embodiment, when the driving member 70, that is, the shaft 120 is rotated counterclockwise, the switch terminal plates 150 and 160 are turned off while generating a click feeling immediately before the stop position. When the shaft 120 is rotated counterclockwise, the switch terminal plates 150 and 160 are turned on while generating a click sensation immediately before the stop position, that is, when the on / off state is reversed, in the present invention, This can be easily dealt with simply by reversing the bending direction of the switch terminal plates 150 and 160.

That is, in FIG. 8, when the shaft 120 is rotated counterclockwise, a click feeling is generated immediately before the stop position by the stopper mechanism (not shown) while the switch terminal plate 150
FIG. 9 is an operation explanatory diagram showing a relationship among the switch terminal plates 150-2 and 160-2, the contact plate 40, the cam body 50, and the engaging portion 75 in a case where the connection between −2 and 160-2 is turned on. FIG. 9 shows the switch terminal plates 150-2, 160
FIG. 2 is a perspective view showing -2.

The second embodiment differs from the first embodiment only in the shapes of the switch terminal plates 150-2 and 160-2. That is, in the above embodiment, the support shaft mounting portion 155 is provided on the switch terminal plate 150 side, but in this embodiment, the support shaft mounting portion 165 is provided on the switch terminal plate 160-2 side, whereby the contact plate 40 and the cam body are provided. 50 and the like operate exactly the same as in the first embodiment, but are turned on when the contact 47 of the contact plate 40 is in contact with the switch terminal plate 150-2, and the contact 49 is switched to the switch terminal plate 160. It is off when it is in contact with -2. That is, the on / off state is opposite to that of the first embodiment.

The case 20 according to the first embodiment shown in FIGS. 1 to 7 and the second embodiment shown in FIGS.
Will be described. FIGS. 10 to 12 show switch terminal plates 150 and 1 used in manufacturing the case 20. FIG.
It is a figure which shows the manufacturing method of No. 60 (150-2, 160-2), and each figure (b) is AA sectional drawing of figure (a).

That is, as shown in FIG. 10, a strip-shaped metal plate is punched out one after another by a press die, and a pair of switch terminal plates 150 and 160 are successively lead frame 300.
To form. This punching step is exactly the same in both the first and second embodiments.

Next, the switch terminal plates 150 and 160 on the lead frame 300 are bent by a bending die. In the case of the first embodiment, as shown in FIG. Fold 151 and 161 to the near side of the drawing.

On the other hand, in the case of the second embodiment, as shown in FIG. 12, the contact portions 151 and 161 are bent to the back side of the paper with respect to the lead frame 300 by a bending mold. In the case of the second embodiment, the switch terminal plate 160-2 is on the left side.

Then, both switch terminal plates 150,
160 between the upper and lower molding dies so as to sandwich the front and back
After the molding resin is pressed into the inside and solidified, the molding die is removed, and the upper and lower portions are cut from the lead frame 300, whereby the case 20 of the first embodiment shown in FIG. 4 is completed.

Similarly, both switch terminal plates 15 of FIG.
The first and second moldings are sandwiched between the upper and lower molding dies so as to sandwich the front and back surfaces of 0, 160, and the molding resin is pressed and solidified into the inside, the molding dies are removed, and the upper and lower portions are cut off from the lead frame 300. The case 20 according to the embodiment is completed. It should be noted that the upper and lower molding dies for molding any of the first and second embodiments have the same shape, and only need to be turned upside down (or by turning the lead frame 300 upside down). The same).

That is, when manufacturing any type of case 20, it is only necessary to reverse the bending direction of the switch terminal plates 150 and 160, and all the manufacturing equipment other than the bending mold uses the same one. Yes, it is.

Although the coil spring is used as the resilient means 60, a resilient member having other various structures such as a rod-shaped spring or a plate-shaped spring may be used instead.

[0043]

As described in detail above, the present invention has the following excellent effects. The structure is simple, and the switch can be turned on and off while reliably generating a click feeling.

Since the contact portions of the pair of switch terminal plates are located at positions symmetrical with respect to a line connecting the center point of both contact portions and the support shaft, any of the switch terminal plates and the support shaft are electrically connected. Therefore, even if the on / off state is reversed, the components constituting the switch mechanism other than the switch terminal plate can be shared, and the manufacturing cost can be reduced.

Further, the contact portions of the pair of switch terminal plates are installed at positions symmetrical with respect to a line connecting the center point of both contact portions and the support shaft, and a support shaft mounting portion is mounted on one of the switch terminal plates. When the support shaft is mounted on the support shaft mounting portion, the ON / OFF state of the switch can be reversed depending on which switch terminal plate is the switch terminal plate provided with the support shaft mounting portion. Any type of switch terminal plate can be used by inverting the pair of switch terminal plates.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing a switch with a variable resistor using a switch mechanism according to the present invention.

FIG. 2 is an exploded perspective view of a main part of the switch mechanism 10.

FIG. 3 is a perspective view showing a pair of switch terminal plates 150 and 160.

FIG. 4 is a perspective view showing a case 20.

FIG. 5 is a perspective view of the cam body 50 as viewed from the back side.

FIG. 6 shows a contact plate 40 and a cam body 5 in the switch mechanism 10.
FIG. 9 is an operation explanatory diagram showing a relationship between a reference numeral 0, a resilient means 60, and an engaging portion 75 of a driving member 70.

FIG. 7 shows a switch terminal plate 15 in the switch mechanism 10.
FIG. 7 is an operation explanatory diagram showing a relationship among 0, 160, a contact plate 40, a cam body 50, and an engaging portion 75;

FIG. 8 is an operation explanatory view showing a relationship among switch terminal plates 150-2 and 160-2, a contact plate 40, a cam body 50, and an engaging portion 75 of a switch mechanism 10-2 according to the second embodiment.

FIG. 9 is a perspective view showing switch terminal plates 150-2 and 160-2.

FIG. 10 shows switch terminal plates 150 and 160 (150-
2, 160-2) is a view showing a manufacturing method.

FIG. 11 is a diagram illustrating a method of manufacturing the switch terminal plates 150 and 160.

FIG. 12 is a diagram illustrating a method of manufacturing the switch terminal plates 150-2 and 160-2.

FIG. 13 is an explanatory diagram of the operation of the switch mechanism.

[Explanation of symbols]

 Reference Signs List 10 switch mechanism 20 case 150, 160 switch terminal plate 151, 161 contact part 170 support shaft 40 contact plate 47, 49 contact 50 cam body 53 engaging part 60 resilient means 70 driving member 75 engaging part 80 upper case 90 variable resistance Container 100 Click mechanism 120 Shaft

Claims (3)

[Claims] 1. A case, a pair of switch terminal plates attached to the case, a support shaft electrically connected to one of the switch terminal plates and protruding from the case, and swingably attached to the support shaft. A contact plate provided with a pair of contacts that contact the contact portions provided on the pair of switch terminal plates when swinging left and right, a cam body swingably attached to the support shaft, and the cam body When the cam body is turned to the left, the contact plate is turned to the right, and when the cam body is turned to the right, the contact plate is turned to the left. And a drive member having an engagement portion that engages with an engagement portion provided on the cam body and swings the cam body to the right and left, wherein the engagement portion of the drive member is a cam body. The cam body swings to the left or right by engaging with the engaging portion of Switch mechanism, characterized in that allowed to contact the contacts reverse the contact portion of the swings either switch terminal plate. 2. A contact portion of the pair of switch terminal plates,
2. The switch mechanism according to claim 1, wherein the switch mechanism is provided at a position symmetrical with respect to a line connecting a center point between both contact portions and the support shaft. 3. A support shaft mounting portion is provided on one of the switch terminal plates, and the support shaft is mounted on the support shaft mounting portion.
3. The switch mechanism according to claim 2, wherein the on / off state of the switch is reversed depending on which switch terminal plate is provided with the support shaft mounting portion.