JP3039720B2 - Switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch device, and more particularly to a switch device in which another knob member is attached to an operation member for operating a switch portion.

[0002]

2. Description of the Related Art FIG. 11 shows a video tape recorder or the like.
1 shows an example of a switch device used in a conventional audiovisual (AV) device. In FIG. 11, a switch device 101 includes a housing 102 and a cover 103.
, A board 105 fixedly mounted in the housing 104, and a cover 103
The cylindrical portion 106a rotatably held by the disk member 10 and the disk portion 10 rotatably held in the housing 104
6b and the cover 1
03, a ring-shaped knob member 107 attached to a cylindrical portion 106a projecting outside
07, a holder 108 fixedly attached to the support shaft 102a of the housing 102, and a pair of operation buttons 109, 11 slidably attached to the holder 108.
0 and so on.

[0005] On the substrate 105, contacts (not shown) for switches are printed, and operation buttons 10 are provided.
Push button switches 111, 11 corresponding to 9, 110
2 are installed. In contrast, the operating member 10
6 is provided with a movable contact spring 113 on the side of the disk portion 106b corresponding to the contact on the substrate 105.
06, the movable contact spring 113
05 while rotating on the operation member 106 while sliding on the
The contact can be switched by this sliding.

On the other hand, push button switches 111 and 112
The operation buttons 109 and 110 attached to the holder 108 correspond to the locking arms 109A and 110A.
Locking claw 109a, 11 formed at the tip of
Oa is engaged with the holder 108 to prevent it from falling off, and is slidably held by the holder 108 by engagement of the locking arms 109A, 110A with the holder 108, and is formed integrally with the holder 108. Part 108
Push button switches 111 and 112 by the urging force of a
And is urged away. The push button switches 111 and 112 push the operation button 109 (or 110) against the substrate 1 against the urging force of the spring portion 108a.
When the operation button 109 (or 110) is pressed, the protrusion 109b (or 1) formed on the pressed operation button 109 (or 110) is pressed.
By 10b), the corresponding push button switch 111 (or 112) is pressed, and the switching operation of the push button switch 111 (or 112) can be performed. In the present embodiment, the operation button 109 is a play button, the operation button 110 is a stop button, and the knob member 107 is a shuttle ring for performing fast forward / fast reverse operations.

By the way, in this type of switch device 101, the operation member 106 and the knob member 107 are fixed by connecting the cylindrical portion 106a of the operation member 106 inside the ring portion 107a of the knob member 107 as shown in FIG. Fitted and fixed.

[0006]

As described above, in the conventional switch device 101, the cylindrical portion 106a of the operating member 106 is fitted and inserted into the ring portion 107a of the knob member 107, and the operation is performed by the pressure generated by the fitting. The fixing between the member 106 and the knob member 107 is achieved. However,
In this fixing structure, if the fitting force is small, it is easy to come off. vice versa,
If the fitting force is too large, a large pressing force is applied to the cylindrical portion 106a to cause deformation of the disk portion 106b, thereby hindering the rotation operation for operating the switch portion. For this reason, there is a problem that it is difficult to set the fitting force and the design is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to surely secure the fitting between an operation member and a knob member without adversely affecting a switch portion. It is an object of the present invention to provide a switch device having a structure that can be used.

[0008]

In order to achieve the above object, the present invention comprises a switch, an operating member for switching the switch, and a knob attached to the operating member. In a switch device in which a tubular portion formed on the other member is fitted and inserted into a ring portion formed on the member, and the knob member is attached to the operating member, an inner surface of the ring portion protrudes from the inner surface. And a D-cut portion that partially reduces the inner diameter of the ring portion by forming a part of the inner surface in a planar shape, and the top is provided on the insertion end surface of the cylindrical portion. An engaging concave portion to be fitted and inserted is provided corresponding to the top, and when the cylindrical portion is inserted into the ring portion, the top is fitted into the engaging concave portion and the cylindrical portion is inserted. Of the above D Tsu said tubular portion being received in the isolation portion is that so as to be fitted in the ring portion.

[0009]

According to this structure, when the cylindrical portion is inserted into the ring portion, the top in the ring portion is fitted and inserted into the engagement concave portion of the cylindrical portion, and the cylindrical portion is inserted by the D cut portion. The outer peripheral surface is received and pressed so that the engagement concave portion does not open more than necessary. Therefore, since the ring portion and the tubular portion are not directly fitted to each other, but are fitted to the top via the engagement recess, even if the fitting force between the top and the engagement recess is large, the fitting force is small. The action is concentrated only on this portion, and the other portion of the cylindrical portion is not deformed. Also, D
Since the outer surface of the cylindrical portion is received by the cut portion, the engaging concave portion of the cylindrical portion does not deform unnecessarily in the opening direction after insertion, and adversely affects other portions of the cylindrical portion due to deformation. Not even. Thus, a structure in which the cylindrical portion and the ring portion are securely fitted can be obtained.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 10 show an embodiment of a switch device according to the present invention, and exemplify a switch device applied to an audio-visual (AV) device such as a video tape recorder.

In FIG. 1 to FIG. 10, this switch device 1 mainly includes a housing 4 composed of a housing 2 and a cover 3, an operation member 5, a shuttle ring 6 as a knob member, a holder 7, It comprises a first operation button 8, a second operation button 9, and the like.

More specifically, the housing 2 is formed of a resin material. A recess 1 is provided on the upper surface side of the housing 2.
0, a projection 11 is integrally formed at substantially the center of the recess 10, and a substrate 12 is provided in the recess 10. On the other hand, a hole 13 for allowing the protrusion 11 to escape is formed in the center of the substrate 12. In addition, substrate 1
2, a push button switch 14 corresponding to the first operation button 8 and a push button switch 15 corresponding to the second operation button 9 are mounted. 15 and a movable contact spring 2 to be described later.
A switching contact (not shown), which constitutes a switch section together with 0, is formed by printing or the like.

The cover 3 is formed of a metal plate, and is disposed so as to cover the upper surface of the housing 2. The locking pieces 1 each having an engagement hole 16 are provided on four end faces of the cover 3.
7 are provided. Note that, on the housing 2 side to which the cover 3 is attached, locking claws 18 are provided corresponding to the engaging holes 16 of the respective locking pieces 17, and the engaging holes 16 are engaged with the locking claws 18. In addition, the cover 3 can be detachably attached to the housing 2. In addition, the push button switches 14 and 15 are provided at the center of the cover 3.
A circular window 19 is formed so as to surround the outside.

The operating member 5 extends through the window 19 and
A cylindrical member 5a rotatably held in a cylindrical shape, and a donut-shaped disk portion 5b formed outwardly from the outer periphery of the lower end of the cylindrical portion 5a and formed in a flange shape. It is formed with. Further, the disk portion 5 b is
2 and are disposed opposite to each other. Further, the substrate 1 of the disk portion 5b
A plurality of movable contact springs 20 are provided on the surface opposing the contact 2 on the substrate 12 so as to correspond to the contacts on the substrate 12. The portion 5b is pressed against the inner surface of the cover 3. When the operating member 5 is rotated, the movable contact spring 20 also rotates integrally with the operating member 5 while sliding on the substrate 12, and the contacts are sequentially switched by the rotation. . On the other hand, on the protruding end side of the cylindrical portion 5a, notches 21 and 22 as engagement recesses are formed at positions displaced from each other by approximately 180 degrees.

The shuttle ring 6 is formed of a resin material, has a ring portion 23 at the lower end having an inner diameter substantially equal to the outer diameter of the cylindrical portion 5a of the operating member 5, and a knob portion at the upper portion. 24 are integrally formed. Of these, the notch 2 of the cylindrical portion 5a
Frames 25 and 26 corresponding to 1 and 22 are provided so as to protrude from the inner surface toward the center. Each of the tops 25 and 26 is formed such that its width becomes smaller than the width of each of the cutouts 21 and 22 toward the lower end (toward the operation member 5). The cutouts 21 and 22 are formed slightly larger than the width of the cutouts 21 and 22, and a split groove 30 is formed at the lower end side. In addition, on the inner surface of the ring portion 23, a D-cut portion 27 formed by forming the inner surface into a planar shape is formed on the inner peripheral surface of the inlet. The portion where the D-cut portion 27 is formed is formed to be substantially equal to or smaller than the outer diameter of the cylindrical portion 5a, so that the inner diameter is effectively smaller than the other portions. Also, an inner peripheral portion 28 (see FIGS. 2 to 4) provided above the portion where the D-cut portion 27 is formed.
) Is formed larger than the outer dimensions of the cylindrical portion 5a. On the other hand, the inner surface of the knob portion 24 has
A step portion 29 having a small diameter on the side is formed. FIG. 5 shows this shuttle ring 6.
Is a bottom view showing as a single item.

The shuttle ring 6 thus formed is connected to the tops 25 and 2 as shown in FIGS.
When the cylindrical portion 5a is inserted into the shuttle ring 6 in correspondence with the notches 21 and 22, the tops 25 and 26 are fitted and pressed into the notches 21 and 22 and operate with the shuttle ring 6. A fixed connection with the member 5 is made. At this time, the outer peripheral surface of the cylindrical portion 5a is received by the D-cut portion 27 of the shuttle ring 6, and the cylindrical portion 5a and the shuttle ring 6 are brought into pressure contact with each other to be in a fitted state. FIG. 4 shows a state before the shuttle ring 6 is attached to the tubular portion 5a, and FIG. 3 shows a state after the attachment.

Therefore, in the structure of this embodiment, the frame 2
The shuttle ring 6 is fixed to the cylindrical portion 5a of the operation member 5 by fitting the notches 21 and 22 with the notches 21 and 22, and fitting the inner surface of the shuttle ring 6 and the outer peripheral surface of the cylindrical portion 5a. . Moreover, in this fixed portion, the fitting between the tops 25 and 26 and the notches 21 and 22 is the main coupling portion and the fitting is performed. However, the fitting between the tops 25 and 26 and the notches 21 and 22 is performed. In this portion, even if the fitting force is increased, the force that causes the deformation of the cylindrical portion 5a does not act so much.
Thus, the disk portion 5b formed integrally with the disk can be securely held without giving any deformation. Also, top 2
Notches (engaging recesses) 21,
The deformation at the distal end portion of the cylindrical portion 5a that occurs when the tube 22 is opened is absorbed by the spread of the inner peripheral portion 28 having a large-diameter dimension, and suppresses deformation to the disk portion 5b side. Therefore, the shuttle ring 6 attached to the tubular portion 5a of the operating member 5 in this manner is
When the gripper 4 is gripped and rotated, the operating member 5 is rotated together with the shuttle ring 6, and the movable contact spring 20 is slid together with the rotation to switch the contacts.

Next, the holder 7 integrally has a disk portion 7a and a shaft portion 7b which extends at a center of the disk portion 7a at a substantially right angle from one surface side of the disk portion 7a. It is formed of a material. Of these, the shaft portion 7b is formed in a cylindrical shape having an opening at the tip, and the projection 11 of the housing 2 is press-fitted and fixed in the shaft portion 7b, and the holder 7 is fixed to the housing 2 by this fixing. Installed. When the holder 7 is attached to the housing 2 in this manner, the shuttle ring 6 is attached to the operation member 5 prior to the attachment of the holder 7, and the holder 7 is assembled thereafter. After the assembly, the portion on the outer peripheral side of the disk portion 7a is in a state of being abutted and positioned on the step portion 29 of the shuttle ring 6. On the other hand, the disc portion 7a has two pushbutton switches 14, 15 formed at positions corresponding to the pushbutton switches 14, 15, respectively.
There are provided two openings 32a and 32b, and four openings 32c formed at positions sandwiched between the openings 32a and 32b, and a leaf spring portion formed in the opening 32c in a substantially U-shape. 33 are provided. In addition, a protruding pin 34 that extends substantially perpendicularly from the other surface side of the disk portion 7a is integrally formed at a tip portion of each leaf spring portion 33. In addition, a pair of protrusions 35 are provided at the center portion on the other surface side of the disk portion 7a, and a slit 36 is formed on each of the protrusions 35 along the axis. An opening 32 is provided on the other surface of the disk portion 7a on which the projection 35 is provided.
a key portion 3 having a substantially L-shaped cross section on the outer peripheral portion corresponding to a
7 are integrally formed.

The first operation button 8 is a lower half part 8a.
And a disk portion 7 of the holder 7
It is formed of a resin material in a disk shape substantially equal to a. Further, the lower half portion 8a is displaced to the back surface (the side facing the holder 7) with respect to the upper half portion 8b, and a step is provided between the two half portions 8a and 8b. Note that this step amount is secured by a substantially thickness dimension of a second operation button 9 described later. Further, in the lower half portion 8a,
An opening 38 is provided so as to hollow out the inside,
A hinge portion 39 having resiliency is formed by the remaining portion where the opening 38 is provided. In addition, a cutout 40 is formed at the lower end of the lower half portion 8a so as to be hooked on the key 37 of the holder 7. On the other hand, on the back side of the upper half portion 8b,
Axial projection 41 corresponding to push button switch 14
And a locking arm 42 having a locking claw 42a at the tip are integrally formed.

The first operation button 8 is attached to the holder 7. When the first operation button 8 is attached to the holder 7, first, the notch 40 is engaged with the key 37 of the holder 7. Projection 41 and locking arm 4
2 into the opening 32b. Then, the locking claw 42a of the locking arm 42 collides with the edge of the opening 32b on the way, and the protruding pin 34 on the leaf spring portion 33 collides with the upper half portion 8b. The plate spring portion 33 is pushed in while being displaced inward while being deformed to the rear surface side. In addition, the locking claw 42a has the opening 3
After passing through the inside of 2b, the locking arm 42 returns to self-elasticity, and the locking claw 42a is engaged with the edge of the opening 32b on the back surface side. Thus, the first operation button 8 is attached to the holder 7 while always receiving the return biasing force of the leaf spring portion 33. FIGS. 7 and 8 show a state in which the first operation button 8 is incorporated in the housing 4 via the holder 7 in this manner.

Therefore, the first operation button 8 is
When it is not pushed from the outside, it is pushed back in the direction away from the push button switch 14 by the urging force of the leaf spring portion 33. When the first operation button 8 is pressed against the urging force of the leaf spring portion 33, the first operation button 8 is displaced toward the push button switch 14 while elastically deforming at the hinge portion 39. The push button switch 14 is pressed by the projection 41 of FIG. Also,
When the pressing force on the first operation button 8 is released, the hinge 3
9 in the direction away from the push button switch 14 by the return force of the leaf spring and the return force of the leaf spring portion 33.
Is returned until it hits the edge of the opening 32b and is regulated. Then, the push button switch 14 is again switched. That is, in the structure of the present embodiment, the first operation button 8 is attached to the holder 7 while being supported by the hinge portion 39,
There is little backlash during operation, and an excellent operation feeling can be obtained.

The second operation button 9 is formed of a resin material in a semicircular shape substantially equal to the lower half portion 8a of the first operation button 8, and is provided between the upper half portion 8b and the lower half portion 8a. And is attached to the holder 7 in a state of being flush with the upper half portion 8b and overlapping with the lower half portion 8a. The second operation button 9 includes the second operation button 9 formed in a semicircular shape.
A protruding wall 46 protruding from the back side from the chord portion, an axial projection 43 protruding from the back side corresponding to the push button switch 15, and a locking claw 44a at the tip. A pair of locking arms 44 projecting from the side are integrally formed. The projecting wall 46 corresponds to the slit 36 of the projecting portion 35 provided on the holder 7, and can be slidably inserted into the projecting wall 46 in the slot 36. The sliding amount here is set to be smaller than the sliding amount of the second operation button 9 when the push button switch 15 is operated.

When the second operation button 9 is mounted on the holder 7, the second operation button 9 is mounted after the first operation button 8 is mounted on the holder 7. In this state, the projection 43 and each locking arm 44 are inserted into the opening 32 a of the holder 7 through the opening 38 of the first operation button 8. Then, the locking claw 44a of the locking arm 44 is opened halfway.
a, and the protruding pin 34 on the leaf spring portion 33 collides with the back surface of the second operation button 9, but when further pushed, the locking arm 44 is displaced inward and the leaf spring portion 33 is held by the holder. 7 while being deformed. When the locking claw 44a has passed through the inside of the opening 32a, the locking arm 44 returns to its own elasticity, and the locking claw 44a is engaged with the edge of the opening 32a on the back surface side. In the structure of this embodiment, the overstroke that is likely to occur at the time of insertion is regulated by inserting the protruding wall 46 into the slot 36 and abutting against the inner wall of the slot 36. A structure is adopted to prevent the projection 43 from sometimes pressing the push button switch 15 excessively, which may have a bad influence. As a result, the second operation button 9 always receives the return biasing force of the leaf spring portion 33,
The lower half portion 8a of the first operation button 9 which is superimposed on the lower half portion 8a of the first operation button 9 and is compactly arranged on the holder 7 to form the hinge portion 39 is approximately the size of the switch device 1. Installed without any effect.

When the second operation button 9 thus attached to the holder 7 is depressed, that is, not pressed from the outside, the second operating button 9 is separated from the push button switch 15 by the urging force of the leaf spring portion 33. Has been pushed back. Then, when the push button switch 15 is pressed against the urging force of the leaf spring section 33, the push button switch 15 can be pressed by the projection section 43 to perform the switching operation. FIGS. 9A and 9B show this operating state. The operation of the second operation button 9 for switching the push button switch 15 will be described next with reference to FIGS. 9A to 9C.
First, FIG. 9A shows a state in which the second operation button 9 is pressed, that is, not pressed from the outside, and the second operation button 9 is pressed by the urging force of the leaf spring portion 33. It is pushed back in the direction away from the button switch 15 and the protruding wall 46 is also displaced to a portion near the outside in the slit 36. Therefore, in this state, the push button switch 15 is not pressed by the protrusion 43. Next, when the second operation button 9 is pressed, the protruding wall 46 penetrates into the slit 36 as shown in FIG. And move until regulated. In a state where the protruding wall 46 is restricted by hitting the inner wall in the slit 36, the push button switch 15 has not yet been pressed by the protrusion 43. Next, when the second operation button 9 is further pressed against the urging force of the leaf spring portion 33, as shown in FIG.
Using the position where the protruding wall 46 and the inner wall of the slit 36 collide as a fulcrum, the second operation button 9 is moved in the direction indicated by the arrow B in FIG.
Rotate in the direction. Along with this, the projection 43 presses the push button switch 15, and the switching operation of the push button switch 15 is performed. When the pressing force of the second operation button 9 is released, the second operation button 9 returns to the state shown in FIG. Accordingly, the push button switch 15 is also switched and returned. Therefore, in the operation of the second operation button 9, the linear movement until the protruding wall 46 hits the inner wall of the slit 36, and the turning movement after hitting it,
Many operation strokes can be obtained. Thereby, the response during operation is sufficiently obtained, and an excellent operation feeling is obtained.

FIG. 10 shows a switch device 1 configured as described above, and an audio device 1 such as a video tape recorder.
00, the audio device 100 has a push-button switch 14 which is switched when the first operation button 8 is pressed to enter the playback mode,
When the shuttle ring 6 is rotated clockwise in this state, fast-forward playback can be performed according to the amount of rotation, and conversely, when the shuttle ring 6 is rotated counterclockwise, reverse playback can be performed. Further, when the second operation button 9 is pressed, the push button switch 15 is operated to switch to a stop state.

Therefore, according to the switch device of this embodiment, when the tubular portion (tubular portion) 5a of the operating member 5 is inserted into the ring portion 23 of the shuttle ring 6, the frame in the ring portion 23 25, 26 are inserted into notches (engaging recesses) 21, 22 of the cylindrical portion 5a, and the D-cut portion 27 receives the outer peripheral surface of the cylindrical portion 5a, so that the notches 21, 22 are received. Is held so that it does not open more than necessary,
As a result, the ring portions 23 and the tubular portions 5a are fitted directly via the tops 25 and 26 and the cutout portions 21 and 22 without being directly fitted together. Even if the fitting force between the operating member 5 and the operating member 5 is large, the fitting force acts only on this portion. 5b and the like are not deformed. Further, since the outer surface of the cylindrical portion 5a is received by the D-cut portion 27, the notched portions 21 and 22 of the cylindrical portion 5a are not deformed in an unnecessarily open direction after insertion. A structure in which the ring portion 23 is securely fitted can be obtained.

Although the present invention has been described with reference to the above embodiment, it is needless to say that the present invention is not limited to the structure of this embodiment.
A switch unit including a movable contact spring 20 and a contact on the substrate 12, and push button switches 14, 15, etc.
Other structures may be applied.
Further, although the structure in which the operation member 5 is inserted into the shuttle ring 6 is disclosed, the structure in which the shuttle ring 6 is inserted into the operation member 5 may be used. And in this case, frame 2
5, 26 and a D-cut portion are formed in the operating member 5,
Notch portions (engagement concave portions) 21 and 22 are shuttle ring 6
Provided on the side.

[0028]

As described above, according to the switch device of the present invention, the ring portion and the cylindrical portion are not directly fitted to each other, but are fitted to the frame via the engaging concave portion. Even if the fitting force between the and the engaging concave portion is large, the fitting force is concentrated only in this portion and does not extend to other portions of the cylindrical portion to cause deformation. And receiving the outer surface of the cylindrical portion, the engaging concave portion of the cylindrical portion does not deform unnecessarily after opening. As a result, it is possible to obtain a structure in which the cylindrical portion and the ring portion are securely fitted without adversely affecting other portions of the cylindrical portion due to deformation.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing an embodiment of a switch device according to the present invention.

FIG. 2 is a schematic vertical sectional side view of the same switch device according to the present invention.

FIG. 3 is a schematic vertical sectional side view showing a coupling structure of an operation member and a shuttle ring of the above switch device according to the present invention in a state after coupling.

FIG. 4 is a schematic vertical sectional side view showing a connection structure between an operation member and a shuttle ring of the above switch device according to the present invention in a state before connection.

FIG. 5 is a rear view of a single shuttle ring of the switch device according to the present invention.

FIG. 6 is an exploded perspective view showing a main part configuration of the above switch device according to the present invention.

FIG. 7 is a front view showing a configuration of a main part of the above switch device according to the present invention in a state before a second operation button is attached.

FIG. 8 is a schematic sectional view taken along the line AA of FIG. 7;

FIG. 9 is a diagram for explaining an operation state of a second operation button in the above switch device according to the present invention.

FIG. 10 is a front view showing a part of a video tape recorder to which the switch device according to the present invention is applied.

FIG. 11 is a schematic vertical sectional side view showing an example of a conventional switch device.

FIG. 12 is a schematic longitudinal sectional side view showing a coupling structure between the operating member and the shuttle ring of the above switch device shown in FIG. 11 after coupling.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Switch device 5 Operation member 5a Tubular part 6 Shuttle ring (knob member) 8 1st operation button 9 2nd operation button 21 Notch part (engagement concave part) 22 Notch part (engagement concave part) 23 Ring part 25 frames 26 frames 27 D-cut part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 25/00 H01H 21/00 H01H 23/00

Claims (2)

(57) [Claims] A switch member, an operation member for performing a switching operation of the switch portion, and a knob member attached to the operation member, wherein the switch member is formed on the other member in a ring formed on the one member. A switch device having the knob member attached to the operating member by fitting and inserting the formed cylindrical portion, wherein a top formed on the inner surface of the ring portion from the inner surface and a part of the inner surface are flat. And a D-cut portion formed by partially reducing the inner diameter of the ring portion, and engaging recesses into which the tops are fitted and inserted into the insertion end surfaces of the tubular portions correspond to the tops. When the cylindrical portion is inserted into the ring portion, the top is fitted into the engagement concave portion, and the outer peripheral surface of the cylindrical portion is received by the D-cut portion so that the cylindrical portion is received. Shape part to the ring part A switch device characterized by being fitted. 2. The D-cut portion is formed in an inner peripheral surface portion of an inlet of the ring portion into which the cylindrical portion is inserted, and the cylindrical portion is formed on an inner peripheral surface of the ring portion deeper than the D-cut portion. 2. The switch device according to claim 1, further comprising a portion formed with an inner diameter larger than an outer diameter of the switch.