JPH08279319A - Switch structure for electric equipment - Google Patents

Abstract

PURPOSE: To provide a switch structure for electric equipment, with which a switch knob arranged freely to be turned can be securely held at the predetermined position and with which an operator knows the arrival of the switch knob to the predetermined position with the secure touch. CONSTITUTION: A switch knob 46, which is provided with a contact part 52 having elasticity, is provided freely to be turned, and contact parts 23a, 23b, 23c, 23d are arranged on the movement route of the contact part 52. A part of these contacts 23a-23d, which contacts with the contact part 52, is formed into the curved surface having a fall in the elastic direction of the contact part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch structure for a novel electric device. Specifically, the switch knob arranged rotatably is securely held at a predetermined position, and the operator knows that the switch knob reaches the predetermined position with a reliable feeling. The present invention intends to provide a switch structure for a new electric device.

[0002]

2. Description of the Related Art There is a switch structure of an electric device in which a contact portion provided on a rotatable switch knob is brought into contact with a contact portion arranged on a movement path thereof to perform a predetermined switch operation.

By the way, in the switch structure of the electric equipment as described above, it is necessary for the operator to know that the switch knob has reached a predetermined position, and the switch knob is surely held at the predetermined position. Needs to be done.

Therefore, conventionally, for example, a switch knob is charged with a sphere urged by a spring, and on the other hand, a member having a contact portion is provided with a recess corresponding to a predetermined position, and the sphere is engaged with the recess. There is one in which the operator is informed that the predetermined position has been reached by a click feeling generated when the switch knob is operated and the switch knob is held at the predetermined position.

[0005]

By the way, in the above-mentioned conventional switch structure for electric equipment, since the switch knob is provided with the spring and the sphere urged by the spring,
There is a problem that the structure of the switch knob becomes complicated.

Further, since the concave portion with which the spherical body is engaged must be formed in the member in which the contact portion is arranged, there is a problem that a space for that is required, which hinders space saving.

[0007]

In order to solve the above-mentioned problems, a switch structure of an electric device according to the present invention has a switch knob provided with a contact portion having elasticity and is rotatably arranged. A contact portion is disposed on the moving path, and a portion of the contact portion that contacts the contact portion is formed into a curved surface having a drop in the elastic direction of the contact portion.

[0008]

Therefore, in the switch structure of the electric device of the present invention, the operator can set the switch knob to a predetermined value by a click feeling generated by the elastic contact portion engaging with the concave portion formed by the curved surface of the contact portion. Since the switch knob is held at a predetermined position by engaging the concave portion with the contact portion, the contact portion of the switch knob has elasticity. Since it is sufficient and the concave portion with which the contact portion is engaged is formed by the curved surface of the contact portion, it does not require an extra space outside the site where the contact portion is arranged, which contributes to space saving.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the switch structure of the electric equipment of the present invention will be described below with reference to the illustrated embodiments. In the illustrated embodiment, the present invention is applied to the switch structure of the room lamp.

Reference numeral 1 is a room lamp, and 2 is its body.

The main body 2 is made of synthetic resin and has a shallow dish-shaped main portion 4 having a recess 3 which is open to the front.

A shallower recess 5 is formed in the central portion of the main portion 4 excluding the upper end in the left-right direction, and the recess 5 has a vertically elongated opening 6 which is displaced downward.

The upper end portion 3a of the recess 3 is formed deeper than the remaining portion. The partition wall 7, which is spaced apart in the left and right direction, is provided at the center of the boundary between the upper end 3a and the remaining portion.
7 are erected.

Engaging claws 8, 8 are provided on the upper surfaces of the partition walls 7, 7.
Is protruding. Engagement holes 10 and 10 are formed on the inner surface of the lower side of the peripheral wall 9 surrounding the recess 3 so as to be separated from each other in the left and right directions.

A mounting hole 11 is formed between the partition walls 7 and 7 so as to penetrate therethrough in the front-rear direction.

Recesses 12a, 12b, 12c are formed in the recess 5 at positions slightly below the partition walls 7, 7 and are arranged in a substantially arcuate shape around the mounting hole 11. The concave portions 12a, 12b, 12c are formed in a concave curved surface when viewed in a cross section along the arrangement direction, and the opening edge portion is formed in a convex curved surface.

Insertion holes 13, 13, ... Are formed at four positions near the upper end and the lower end along the side edge of the recess 5. The insertion holes 13, 13, ... Are the front end portions 13a, 1
3a, ... Are large-diameter portions having a diameter approximately twice that of the remaining portions 13b, 13b ,.

Further, a rib 14 is provided so as to project at a substantially central portion along the lower edge of the recess 5.

Walls 15a, 15b are formed rearward from the upper and lower edges of the opening 6 and the upper and lower end portions of the side edge.

Further, a support wall 16 projecting rearward is formed in a substantially central portion of the rear surface of the main portion 4 corresponding to the upper edge of the recess 5, and a partition wall 17 is formed from the upper surfaces near the left and right ends of the support wall 16. , 17 are projected upward, and the reinforcing walls 18, 18 are projected downward from a position near the center of the lower surface of the support wall 16.

Reference numeral 19 denotes a first contact, which is a connection piece 20 formed by a thin strip-shaped portion in a substantially inverted C shape when viewed from the front, and a bulb holding piece connected to the lower end portion of the connection piece 20. 21 and a contact portion 23b connected to the upper end piece of the connection piece 20 side by side through short connecting pieces 22 and 22,
23c are integrally formed.

The light bulb holding piece 21 is substantially V-shaped when viewed from the side.
The bulb-shaped lamp holding portion 24 and a rectangular plate-shaped base piece 25 continuous to the lower end of the bulb holding portion 24 are integrally formed, and the base piece 25 is located behind the lower end portion of the connection piece 20. And the lower end of the left side edge of the connecting piece 20.
Is connected to the left end of the lower end of the. Further, in the light bulb holding portion 24, the piece 24a on the side opposite to the base piece 25 serves as a light bulb contact piece, and a lightening hole 24b is formed at a substantially central portion of the light bulb contact piece 24a.

The contact portions 23b and 23c are curved in a convex shape with the center in the left-right direction located forward.

The connecting piece 20 has a large number of small holes 26,
26, ... Are formed.

The first contact 19 as described above is integrally connected to the body 2 by so-called insert molding, and the base piece 25 of the light bulb holding piece 21 is located at the center of the lower end of the main portion 4 of the body 2. Buried, the bulb holder 24 is on the wall 1
It is located so as to project above 5b. Further, the connecting piece 20 is exposed on the front surface of the recess 5, the contact portion 23b covers the front surface of the portion between the recesses 12a and 12b, and the contact portion 23c is the portion between the recesses 12b and 12c. Is located to cover the front of the. And the connection piece 20
, Are filled with the material resin of the body body 2, so that the connecting piece 20 can be connected to the body body 2.
It is designed not to be easily peeled off.

The second contact 27 is connected to a connection piece 28 which is in the form of a narrow strip and has a substantially inverted U shape when viewed from the front, and a light bulb holding piece 29 connected to the lower end of the connection piece 28. Piece 28
Is integrally formed with the terminal piece 30 connected to the upper end of the.

The light bulb holding piece 29 comprises a base piece 31 having a substantially rectangular shape when viewed from the front and a light bulb contact piece 32 connected to a lower edge of the base piece 31, and the light bulb contact piece 32 has a front end portion 32a which is forward. The main hole 32b, which is curved in a convex shape toward the front end 32a and protrudes rearward from the lower edge of the front end 32a, has a polishing hole 32 at the center.
c is formed.

The terminal piece 30 is formed by integrally forming a connecting piece 33 having a substantially L-shape when viewed from the side and an inserting piece 34 protruding upward from the rear end of the connecting piece 33.
Is connected to the upper end of the connecting piece 28.

The connection piece 28 has two small holes 26 formed therein.

Therefore, the second contact 27 is
The base piece 31 of the bulb holding piece 29 is embedded in the central portion of the main body 4 of the body 2 near the upper edge of the opening 6 except for the lower end portion, and the lower end portion extends from the upper opening edge of the opening 6. The bulb contact piece 32 is projected downward, and the bulb contact piece 32 is projected rearward from the lower end thereof. As a result, the two bulb contact pieces 3
2, 24a are vertically opposed to each other in the opening 6.

Further, the terminal piece 30 is the connecting piece 3 thereof.
3 is embedded in the support wall 16 of the body 2 and the insertion piece 3
4 is projected upward from the upper surface of the support wall 16.

The connecting piece 28 is exposed at the left end of the upper end of the recess 5, and the small holes 26, 26 thereof are filled with the resin material of the body 2 so that the connecting piece 20 is formed. It is designed so as not to be easily peeled off from the body body 2.

The third contact 35 is formed by integrally forming a connecting piece 36, a contact portion 23d and a terminal piece 37.

The connecting piece 36 is in the form of a narrow strip extending in the left-right direction, and the small hole 26 is formed in the substantially central portion.

The contact portion 23d is curved in a convex shape so that the right end thereof is displaced rearward, and the upper edge of the left end portion thereof is a connecting piece 38.
Is connected to the lower edge of the connection piece 36 near the left end.

The terminal piece 37 is formed by integrally forming a connecting piece 39 having a substantially V shape when viewed from the side and an inserting piece 40 extending upward from the upper end of the connecting piece 39. The lower end front edge is integrally connected to the right end edge of the connection piece 36.

The connecting piece 39 of the terminal piece 37 of the third contact 35 is the reinforcing wall 1 of the body 2.
8 is embedded in the plug 8, and the insertion piece 40 is projected upward from a position on the upper surface of the support wall 16 which is spaced rightward from the protruding position of the insertion piece 34. The contact portion 23d is located so as to cover the left opening edge of the recess 12c of the body 2 and the connecting piece 38 and the connecting piece 36 are exposed on the front surface of the body 2. Then, the small hole 26 of the connecting piece 36
Is filled with the material resin of the body body 2, so that the connection piece 20 is not easily separated from the body body 2.

The fourth contact 41 is a narrow strip-shaped connecting piece 42 having a substantially U-shaped front shape, and a contact portion 23a connected to the upper right end portion of the connecting piece 42. Connection piece 4
The ground pieces 44, 44, ... Connected via the connecting pieces 43, 43, ... so as to project outward from the left and right upper end portions and the left and right lower end portions. It is formed integrally. The connecting pieces 43, 43, ...
In order to provide a step between the connection piece 42 and the ground pieces 44, 44, ..., The rising portions 43a, 43a ,.
・ Is formed.

The earth pieces 44, 44, ... Are the insertion holes 44.
has a donut shape having a, 44a, ..., The contact portion 23a is curved in a convex shape so that the left end is displaced rearward, and the small hole 26, Two
6 is formed, and embedded pieces 45, 45, 45 project from the left edge of the left side piece of the connection piece 42.

Thus, in the connecting piece 42 of the fourth contact 41, the right side piece except the upper and lower end portions is embedded in the right wall of the shallow recess 5 of the body 2, and the remaining portion is the recessed portion. 5, the buried pieces 45, 4 located along the periphery of
Reference numerals 5 and 45 are embedded in the left wall of the recess 5. Further, the small holes 26, 26 are filled with the material resin of the body 2 so that the connecting piece 20 is not easily separated from the body 2.

The contact portion 23a is the recess 12a of the body 2.
Are located so as to cover the right edge of the opening of the body 2, and the ground pieces 44, 44, ...
Are located in front of the large-diameter portions 13a, 13a, ... Of which the peripheral portions are embedded in the body 2 and
The insertion holes 44a, 44a, ... Are the insertion holes 13, 13 ,.
.. are arranged so as to match the small diameter portions 13b, 13b, ....

Reference numeral 46 is a switch knob.

The switch knob 46 comprises a molded portion 47 made of synthetic resin and a contact piece portion 48 integrated with the molded portion 47 by insert molding.

The mold portion 47 has a shape in which the grip portion 50 projects from the front surface of the upper end of a thick plate-shaped main portion 49, and a mounting hole penetrating forward and backward is provided at a position near the lower end of the main portion 49. 51 is formed.

The contact piece portion 48 is formed of a material having conductivity and spring property and has a vertically long strip plate shape, and a lower end portion thereof has a contact portion 52 protruding rearward in an arc shape when viewed from above and below. Has been formed. Further, an insertion hole 53 is formed at a position approximately in the middle of the contact piece portion 48 in the vertical direction.

The contact piece portion 48, except for the lower end portion thereof, extends from the lower end portion of the main portion 49 of the mold portion 47 to the grip portion 50.
Inserted over, the remaining part is the mold part 4
It is in a state of being projected downward from the lower end of 7. Then, the insertion hole 53 of the contact piece portion 48 and the mounting hole 51 of the mold portion 47 are aligned.

Reference numeral 54 denotes a mounting rivet, which has a head portion 54a and a foot portion 54b, and the foot portion 54b is a switch knob 46.
The mounting knob 51 is inserted into the mounting hole 51 of the body 2 from the front, and further inserted into the mounting hole 11 of the body main body 2, and the tip portion protruding to the back surface side of the body main body 2 is swaged, and the switch knob 46 is rotated to the body main body 2. It can be attached freely. Then, in this state, the contact portion 52 of the contact piece portion 48 is moved in the portion where the contact portions 23a, 23b, 23c, 23d of the body body 2 are arranged in an arc shape.

As described above, in the switch knob 46, the contact piece portion 48 formed of the metal plate extends to the grip portion 50 beyond the mounting hole 51 serving as the rotation fulcrum portion. It has the effect of increasing strength.

Reference numeral 55 denotes a lens, which is formed in such a size that it covers the portion of the recess 3 of the body 2 just above the partition walls 7 and 7 from below. The engaging projections 5 are provided on the inner surface of the upper end portion of the peripheral wall portion 56 of the lens 55 so as to be spaced apart to the left and right.
7 and 57 are formed, and engaging projections 58 and 58 are formed on the outer surface of the lower end portion of the peripheral wall portion 56 so as to be laterally spaced from each other. Then, the engagement protrusions 58, 58 at the lower end portion are engaged holes 10, 1 formed in the inner surface of the lower side portion of the peripheral wall 9 of the body body 2.
0, and the rear end inner edge of the lower end portion of the peripheral wall portion 56 is in contact with the lower surface of the rib 14 formed on the body body 2. Further, the engagement protrusions 57, 57 formed on the upper end portion of the peripheral wall portion 56 engage with the engagement claws 8, 8 formed on the upper surfaces of the partition walls 7, 7 of the body body 2. In this way, the lens 55 is attached to the body body 2.

The switch knob 46 is used for the lens 5
5, a notch 59 formed in the center of the upper end portion of the peripheral wall portion 56.
The grip portion 50 projects through the lens 55 above the lens 55.

Numerals 60, 60, ... Depict concave grooves formed on the left and right outer side surfaces of the body 2 so as to reach the front and rear.

Further, before the lens 55 is attached to the body 2, the ends of the base parts 62, 62 of the light bulb 61 are the polishing holes 24b, 32c of the light bulb contact pieces 24a, 32.
Is supported in the state of being engaged with.

Further, before the lens 55 is mounted on the body 2, the mounting screws 63, 63, ... Made of a conductive material are inserted from the front side into the insertion holes 13, 13 ,.
.. and is screwed to a structural member of a car body (not shown). Then, the mounting screws 63, 63, ...
Is a structural member whose heads 63a, 63a, ... Are in contact with the ground pieces 44, 44, ... Of the fourth contact 41, and the mounting screws 63, 63 ,. At least one of them has conductivity, whereby the fourth contact 41, that is, the contact portion 23a becomes the ground level. Since there are four grounding pieces 44, 44, ..., any one of them may be grounded, and therefore the flexibility of the installation location is high.

Then, a connector (not shown) provided on the vehicle body side is connected to the insertion pieces 34, 40. As a result, the insertion piece 34 is connected to the power source, and the insertion piece 40 is grounded via the door switch (not shown). That is, the bulb contact piece 32 is connected to the power source, and the contact portion 23d is grounded via the door switch.

Then, the switch knob 46 is set to the neutral position,
That is, when the contact portion 52 is brought into contact with the contact portions 23b and 23c, one base portion 62 of the light bulb 61 is connected to the power source, but the other base portion 62 is not grounded. The light bulb 61 never lights up. When the switch knob 46 is tilted to one side from the neutral position so that the contact portion 52 comes into contact with the contact portions 23a and 23b, the light bulb 61 is lighted with the other base portion 62 grounded. Further, when the switch knob 46 is tilted in the direction opposite to the tilt direction from the neutral position so that the contact portion 52 comes into contact with the contact portions 23c and 23d, the other base portion 62 of the light bulb 61 operates the door switch. The light bulb 61 is not lit as it is through the grounding (the door is closed), but when the door is opened and the door switch is closed, the other base portion 62 of the light bulb 61 is grounded.
The light bulb 61 lights up.

At this time, the contact portion 52 of the switch knob 46
Has a convex curved surface, and the contact portion 23a,
23b, 23c, and 23d are also curved, and each contact part 2
Since the recesses are formed between 3a, 23b, 23c, and 23d, the operator can clearly understand that the switch knob 46 has reached a predetermined position (a so-called click feeling), and the switch knob 46 has a touch. The holding at the predetermined position is ensured, and the tilting of the switch knob 46 can be performed smoothly.

Next, a method for manufacturing the above room lamp 1 will be described.

First, the four contacts 19, 27, 3
A continuous contact set body is formed by connecting a plurality of contact sets each including 5 and 41 as a set.

FIG. 13 shows one contact set 64.

The contacts 19, 27, 35 and 41 are made of a conductive metal plate so that the contacts 19, 27, 35 and 41 have narrow widths.
Are integrally formed by.

In the figure, each contact 19, 27, 3
5 and 41 are shown in a state in which their shapes have already been adjusted by press molding. First, by punching, a series of original contact sets in which a large number of original contact sets are continuous are formed, and then by press molding, as shown in the figure. The contact set 64 is formed.

Then, as shown in the figure, the first contact 19 is formed in the state of being formed as the contact set 64.
In the above, the light bulb holding piece 21 is folded back to the connection piece 20 so that the light bulb contact piece 24a and the other light bulb contact piece 32 are vertically opposed to each other. ing. If the original light bulb holding piece and the original light bulb contact piece are arranged vertically in the punching process without adopting such a structure, the vertical lengths of the two pieces are long and the two overlap. Therefore, when punching, the left and right sides are displaced from each other, and when the press molding is performed, the bulb holding piece 21 is connected to the connection piece 2 in the above example.
The light bulb contact piece 24a is folded up with respect to 0 so as to face the light bulb contact piece 32 vertically.

Since the base pieces 25 and 31 of the bulb holding pieces 21 and 29 are embedded in the body body 2,
When the light bulb 61 is attached or detached, the light bulb holding pieces 21, 29 do not peel off from the body body 2.

The four ground pieces 44, 44, ...
Are arranged at four places, and these are connected by the connecting pieces 42 to form a frame shape, so that the strength of the contact set 64 is increased and it is difficult to receive deformation during handling.

Further, the connecting pieces 43, 43, ... Connecting the ground pieces 44, 44, ... And the connecting piece 42 are formed with rising portions 43a, 43a ,. Therefore, it is easy to adjust the positions of the ground pieces 44, 44, ... By adjusting the bending angle of the rising portions 43a, 43a ,.
, a function of absorbing the shrinkage of the resin for molding the body 2 after injection and avoiding a fatal deformation of the contact 41.

Although not shown, a large number of such contact sets 64 are continuously formed to form a contact set continuum 66. The formation of such a contact set continuum 66 is performed by forming the ground pieces 44, 44, ... Of the adjacent contact sets 64 ,.
-This is done by connecting the spaces with connecting bands 67, 67, ....

The contact set continuum 66 described above is
The contact sets 64, 64, ...
One is inserted so that it is located in the body body molding die of a molding machine equipped with the body body molding die, and the body body resin is injected into the body body molding die to make the resin body. The body body 2 and the contact set 64 are integrated to form a lamp body 68. Then, the formation of the lamp body 68 is sequentially performed for each of the contact sets 64, 64, ... Provided in the contact set continuum 66, whereby a lamp body continuum (in which a large number of lamp bodies 68 are continuous ( (Illustration is omitted) is formed.

In the lamp body 68, most of the base piece 25 of the light bulb holding piece 21 and the base piece 31 of the light bulb holding piece 29 are in a state of being embedded in the material resin of the body body 2, so that the light bulb is held. The strength of the pieces 21 and 29 is increased, and the pieces 21 and 29 can withstand a large force applied when the light bulb 61 is attached and detached.

The lamp bodies 68, 68, ... Are separated from the continuous body of lamp bodies to form a large number of lamp bodies 68, 68 ,. The separation of the lamp bodies 68, 68, ...
.. of 69, 69, ... The cutting points 69, 69, ... Are located along the inner surface of the recessed portions 60, 60, ... On the outer side surface of the body 2 for easy separation. Also, the cut end does not protrude from the side surface of the body body 2.

Simultaneously with the separation, the punching holes 70, 70, ... Of the main portion 4 of the body 2 are formed,
The solidarity portion 6 that connects the contacts 19, 27, 35, 41 by forming the punched holes 70, 70, ....
The contacts 5, 27, 35, 41 are electrically isolated from each other.

14 to 19 show modifications of the switch knob in the room lamp 1 and its mounting.

In the structure shown in FIG. 14, the body main body 2 is provided with a mounting pin 72 having a slit 71 reaching the front end.
The mounting pin 72 is inserted into the mounting hole 51 of the switch knob 46, and the engaging protrusions 73, 73 formed at the front end portion thereof are engaged with the front opening edge of the mounting hole 51 to move the switch knob 46 into the body body. 2 is rotatably supported.

In FIG. 15, the surface of the mounting pin 72 shown in FIG. 14 is covered with metal plates 74, 74 which are integrated with the body 2 by insert molding.

In the structure shown in FIG. 16, metal plates 75, 75 having a substantially L-shape are integrated with the body 2 by insert molding, and parts 75a, 75a of the metal plates 75, 75 are projected forward in a state of being close to each other. The protrusions 75a, 75a are inserted into the mounting holes 51 of the switch knob 46, and the protrusions 75a, 75a
The switch knobs 46 are rotatably supported on the body 2 by engaging the bulging portions 75b, 75b formed at the front end portions of the respective parts so as to project in opposite directions to the front end opening edges of the mounting holes 51. is there.

FIG. 17 shows a mounting pin 7 having a slot 76 extending from the rear surface of the switch knob 46 to the rear end.
7 is integrally provided on the mold portion 47, and the mounting pin 77 is inserted into a mounting hole 78 formed in the main portion 4 of the body 2;
Engaging projections 79, 79 formed on the tip of the mounting pin 77
Is engaged with the rear opening edge of the mounting hole 78 of the body body 2, whereby the switch knob 46 is rotatably attached to the body body 2.

In FIG. 18, the surface of the mounting pin 77 in FIG. 17 is covered with the covering portions 80, 80 which are integrally projected from the edge of the insertion hole 53 of the contact piece portion 48.

FIG. 19 shows a mounting leg piece 8 projecting rearward from the rear surface of the molding portion 47 in a state of being close to each other.
1, 81 are integrally projected from the edge portion of the insertion hole 53 of the contact piece portion 48, and the attachment leg pieces 81, 81 are inserted into the attachment holes 78 formed in the main portion 4 of the body 2 to attach the attachment legs. The swelled portions 81a and 81a formed so as to project in the opposite directions to each other at the rear ends of the pieces 81 and 81 are engaged with the rear end opening edges of the mounting holes 78, and the switch knob 46 is rotated to the body body 2. It is a possible endorsement.

[0078]

As is apparent from the above description, in the switch structure of the electric device of the present invention, the switch knob having the elastic contact portion is rotatably disposed, and the movement path of the contact portion is provided. The contact portion is disposed on the contact portion, and a portion of the contact portion that contacts the contact portion has a curved surface having a drop in the elastic direction of the contact portion.

Therefore, in the switch structure of the electric device of the present invention, the operator can set the switch knob to a predetermined value by a click feeling generated by the elastic contact portion engaging with the concave portion formed by the curved surface of the contact portion. Since the switch knob is held at a predetermined position by engaging the concave portion with the contact portion, the contact portion of the switch knob has elasticity. Since it is sufficient and the concave portion with which the contact portion is engaged is formed by the curved surface of the contact portion, it does not require an extra space outside the site where the contact portion is arranged, which contributes to space saving.

It should be noted that the specific shapes and structures of the respective parts shown in the above embodiments are merely examples of the embodiment when the present invention is carried out, and the technical scope of the present invention is thereby provided. It should not be interpreted in a limited way.

[Brief description of drawings]

FIG. 1 shows an example of an embodiment in which a switch structure of an electric device of the present invention is applied to a switch structure in a room lamp, and this figure is an enlarged front view showing a room lamp with a part of a lens cut away. is there.

FIG. 2 is an enlarged rear view of the room lamp.

3 is a cross-sectional view taken along the line III-III in FIG.

4 is a sectional view taken along the line IV-IV in FIG.

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 is an enlarged sectional view showing a light bulb holder.

FIG. 7 is an enlarged cross-sectional view showing an engaging portion of a lower end portion of a lens with a body body.

FIG. 8 is an enlarged cross-sectional view showing an engaging portion of the lens upper end portion with the body body.

FIG. 9 is an enlarged perspective view of a switch knob.

FIG. 10 is an enlarged front view showing a contact portion of the switch.

FIG. 11 is an enlarged cross-sectional view showing a contact portion of a switch cut along the arrangement direction.

FIG. 12 is an enlarged perspective view showing a connector portion formed on the back surface of the lamp body.

FIG. 13 is an enlarged perspective view showing a contact set continuum.

FIG. 14 is an enlarged cross-sectional view of a main part showing a modified example of the switch knob and its attachment.

FIG. 15 is an enlarged cross-sectional view of a main part showing another modification of the switch knob and its attachment.

FIG. 16 is an enlarged cross-sectional view of a main part showing still another modified example of the switch knob and its attachment.

FIG. 17 is an enlarged cross-sectional view of a main part showing still another modified example of the switch knob and its attachment.

FIG. 18 is an enlarged cross-sectional view of a main part showing still another modified example of the switch knob and its attachment.

FIG. 19 is an enlarged cross-sectional view of a main part showing still another modified example of the switch knob and its attachment.

[Explanation of symbols]

 1 Room lamp (electrical device) 2 Body (body) 23a, 23b, 23c, 23d Contact part 46 Switch knob 52 Contact part

Claims (4)

[Claims] 1. A portion in which a switch knob having a contact portion having elasticity is rotatably disposed, a contact portion is disposed on a movement path of the contact portion, and the contact portion of the contact portion contacts the contact portion. Is a switch structure of an electric device, characterized in that it has a curved surface having a drop in the elastic direction of the contact portion. 2. The switch structure for an electric device according to claim 1, wherein the contact portion is a bridge bridging between adjacent contact portions. 3. The contact point portion is formed of sheet metal, and the curved surface thereof is in close contact with the surface of the body that rotatably supports the switch knob. Switch structure for electrical equipment as described in. 4. The switch structure for an electric device according to claim 1, wherein the electric device is a room lamp arranged in an interior of an automobile.