JPH09318057A - Seal structure, packing and equipment using seal structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an assembling operation for members while their sealing characteristics being kept by a method wherein there are provided an annular rib projecting over an entire circumference of an outer periphery of a packing and having its width specified and another annular rib projecting over an entire circumference of an inner periphery of the packing and having its width smaller than the width of the packing. SOLUTION: This packing is constructed such that annular outer circumferential ribs 301, 302 projecting over an entire circumference of the outer peripheral surface of a cylindrical main body 30 are arranged side-by-side at the main body closely fitted to a through-pass hole, and annular inner circumferential ribs 311, 312 projected over an entire circumference of the inner periphery of the main body are arranged side-by-side. Outer diameters of the outer circumferential ribs 301, 302 are set to be slightly larger than that of the through-pass hole, and inner diameters of the inner circumferential ribs 311, 312 are set to be slightly smaller diameters than a diameter of a contacted section between these ribs at a tapered surface 231. A value of sum of heights of the outer circumferential rib 301 and the inner circumferential rib 311 and a value of sum of heights of the outer circumferential rib 302 and the inner circumferential rib 312 are slightly larger than a value in which a wall thickness value of the main body 30 is subtracted from a size value of the clearance between the through-pass hole and the cylindrical body 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure, and more particularly, to a watertight or airtight state of an annular space formed between a hole provided in an object and a substantially columnar connecting body inserted into the hole. It relates to a structure for sealing to.

[0002]

2. Description of the Related Art FIG. 10 is an explanatory view of a main part of a remote controller with a television for a water heater according to the prior art. The remote controller with a television shown in the figure is configured to include a television device (1) and a remote control device (2) for remotely operating the water heater. The casing (100) of the television device (1) is a watertight box, and a part of the casing (100) is a mounting base (1) for mounting the remote control device (2).
b).

A through hole (7) is provided in the front wall (101) of the mounting base (1b), and the through hole (7) has a circuit inside the television device (1) and a remote control device (2). A cable (93) for electrically connecting to the circuit is inserted. Then, through the annular packing (9) that surrounds the through hole (7) all around, the front wall (10
1) and the remote control device (2) are in close contact.

Further, the remote control device (2) is screwed to the mounting base (1b), and the entire packing (9) is pressed by the remote control device (2) and the front wall (101). Has become. In this pressed state, the closely contacted portion is sealed in a watertight state, and the inside of the casing (100) is maintained in a watertight state. Also, the packing (9) is
It is bonded to 1) over the entire circumference with a silicone adhesive (91). Therefore, the sealing property of the closely contacted portion is further improved.

[0005]

However, in this conventional technique, when the remote control device (2) is mounted on the mounting base (1b), the packing (9) is attached to the front wall (101) of the mounting base (1b). Since it has to be bonded and the workability of this bonding is not good,
Installation of the remote control device (2) is not easy. Moreover, since it is difficult to apply the adhesive (91) to the packing (9) evenly, the reliability of the sealing property becomes low.

FIG. 11 is an explanatory view of the main part of another remote controller with a television. As shown in the figure, a remote controller different from the above-mentioned conventional remote controller with a television can be considered. In this one,
A rubber cylindrical packing (9a) is tightly fitted in the through hole (7). The outer diameter of this tubular packing (9a) is the through hole (7).
This tubular packing is set slightly larger than the diameter of
By press-fitting the (9a) into the through hole (7), the contact portion of the through hole (7) with the peripheral surface is sealed over the entire circumference.
Also, on the inner peripheral surface of this cylindrical packing (9a), the O-ring (9b)
Is held.

On the other hand, the remote control device (2) is provided with a cylindrical body (23) protruding from the back surface thereof. The outer diameter of the tubular body (23) is set to be slightly larger than the inner diameter of the O-ring (9b). By inserting the tubular body (23) into the tubular packing (9a), the tubular body (23) is The outer peripheral portion is sealed by the O-ring (9b) over the entire circumference. As described above, the casing (1
00) The inside is kept watertight.

However, when the tubular packing (9a) is press-fitted into the through hole (7), the tubular packing (9a) has substantially the entire fitting portion into the through hole (7) around the through hole (7). Since the surface is rubbed, the pushing force required for the press-fitting increases with the progress of the press-fitting. Therefore, in this case, it is not easy to attach the tubular packing (9a). It is an object of the invention of claim 1 to provide a seal structure which can be easily assembled while maintaining the sealing property.

It is an object of the present invention to provide a packing for use in a seal structure which is easy to assemble while maintaining the sealing property. According to an eleventh aspect of the present invention, there is provided "a casing configured in a watertight state, an attachment body detachably attached to the casing so as to cover a hole provided in a wall forming the casing, and a projection projecting from the attachment body. A device using a structure that includes a tubular body that is inserted into the hole and seals an annular space formed between the hole and the tubular body in a watertight state or an airtight state. An object of the present invention is to provide a device using a seal structure that can be easily assembled while maintaining.

[0010]

According to a first aspect of the present invention, there is provided an annular space formed between a hole provided in an object and a substantially columnar connecting body inserted into the hole. A structure for sealing in a watertight state or an airtight state, a tubular packing inserted into the annular space, and a circumferential surface of the hole portion or an outer circumferential surface of the packing, projecting over the entire circumference, and its width is The width of the hole in the axial direction, the width protruding from the inner peripheral surface of the packing or the outer peripheral surface of the connector over the entire circumference, and the annular first rib smaller than the thickness of the object. , The width is a width in the axial direction of the hole, and the width is an annular second rib smaller than the width of the packing,
And the packing is pressed over the entire circumference by the peripheral surface of the hole and the outer peripheral surface of the connecting body via the first rib and the second rib ”. .

In this structure, the packing is inserted into the hole and the connector is inserted into the packing. By these insertions, the packing is pressed over the entire circumference by the peripheral surface of the hole through the first rib, and the packing is completely pressed by the outer peripheral surface of the connection body through the second rib. It will be pressed all around. In this case, since the width of the first rib is smaller than the thickness of the object having the hole portion, when the packing is inserted into the hole portion, the force required for pushing is increased even if the insertion depth becomes large. Hard to increase. The width of the second rib is
Since the width is smaller than the width of the packing, the force required for pushing is unlikely to increase when the connecting body is inserted into the packing even if the insertion depth increases.

Here, in the description of claim 1, "the packing covers the entire circumference by the peripheral surface of the hole and the outer peripheral surface of the connecting body via the first rib and the second rib. Is pressed ", specifically, as in the invention of claim 2,
"The sum of the heights of the first rib and the second rib is larger than the value obtained by subtracting the wall thickness value of the packing from the dimension value of the gap between the hole and the connection body" But it's okay.

According to a third aspect of the present invention, "the first rib and the second rib are located on the same plane substantially perpendicular to the axis of the hole", the circumference of the hole is small. The pressing force applied to the first rib from the surface and the pressing force applied to the second rib from the outer peripheral surface of the connector act on the same plane. According to a fourth aspect of the present invention, in the case of "a plurality of each of the first ribs and the second ribs is arranged in the axial direction of the hole portion", the first ribs and the first ribs in the packing are provided. A plurality of pressing portions formed by two ribs are set in the axial direction of the hole.

According to a fifth aspect of the present invention, "the connecting body projects from an attaching body which is detachably attached to the object, and the outer peripheral surface of the connecting body is directed toward the tip side of the connecting body. It may be formed on a tapered surface having a reduced cross section. In the invention of claim 5, as in the invention of claim 6, in the case where “the plurality of second ribs are formed so that their inner peripheral portions substantially match the tapered surfaces”, When the connecting body is inserted, the packing is pressed by the outer peripheral surface of the connecting body through the plurality of second ribs at the final stage of the insertion.

According to a seventh aspect of the invention, in which "the first rib or the second rib is formed such that the outer peripheral edge of its cross section is formed into a substantially arcuate shape", or the outer peripheral portion of the first rib, or The contact area between the inner peripheral portion of the second rib and the surface in contact with them becomes small. According to the invention of claim 8, "the first rib or the second rib is formed in a piece-shaped cross section that can be elastically deformed in the axial direction of the hole", in the packing of the packing into the hole. When inserting or inserting the connecting body into the packing, the first portion formed in the piece-shaped cross section
The rib or the second rib is bent forward in the insertion direction. Then, in the inserted state, the piece-shaped cross section of the first rib or the second rib is pressed against the contact surface by the elastic restoring force. Further, in the pressed state, the contact area can be set large because the piece-shaped cross section is bent as described above.

The means for solving the problems of the ninth aspect of the present invention is that "the annular space formed between the hole provided in the object and the substantially columnar connecting body inserted into the hole is made watertight or airtight. A packing for sealing, which is a tubular main body having a size that can be inserted into the annular space, and projects over the entire circumference from the outer peripheral surface of the main body, the width of which is in the axial direction of the hole. The width is the width in the axial direction of the hole, and the width is an annular outer rib that is smaller than the thickness of the object, and protrudes from the inner peripheral surface of the main body over the entire circumference. And
An annular inner peripheral rib whose width is smaller than the width of the main body,
And a value of a sum of heights of the outer peripheral rib and the inner peripheral rib is larger than a value obtained by subtracting a wall thickness value of the main body portion from a dimension value of a gap between the hole portion and the connection body. It's big.

In this structure, when the body is inserted into the hole and the connector is inserted into the body,
The main body portion is pressed by the peripheral surface of the hole portion over the entire circumference through the outer peripheral ribs, and the main body portion is pressed by the outer peripheral surface of the connector through the inner peripheral ribs over the entire circumference. It will be in a pressed state. In this case, since the width of the outer peripheral rib is smaller than the thickness of the object, the force required for pushing is unlikely to increase when the body portion is inserted into the hole even if the insertion depth becomes large. Further, since the width of the inner peripheral rib is smaller than the width of the main body portion, when inserting the connecting body into the main body portion, even if the insertion depth becomes large, the force required for pushing is not likely to increase. .

According to a tenth aspect of the present invention, "the main body portion, the outer peripheral ribs, and the inner peripheral ribs are integrally formed of rubber, and the outer peripheral ribs and the inner peripheral ribs are formed in the hole portion. Located on the same plane substantially perpendicular to the axis ”, the pressing force applied from the peripheral surface of the hole to the outer peripheral rib and the pressing force from the outer peripheral surface of the connector to the inner peripheral rib. The pressing force acts on the same plane.

According to the eleventh aspect of the present invention, there is provided "a cylindrical packing which is inserted into the annular space, and a circumferential surface of the hole or an outer circumferential surface of the packing, which projects over the entire circumference. The width is a width in the axial direction of the hole, and the width is an annular first rib smaller than the thickness of the constituent wall,
It projects over the entire circumference from the inner peripheral surface of the packing or the outer peripheral surface of the tubular body, the width of which is the width in the axial direction of the hole, and the width of which is smaller than the width of the packing. Two ribs, and the packing is pressed over the entire circumference by the peripheral surface of the hole and the outer peripheral surface of the tubular body via the first rib and the second rib. Is characterized by.

With this, the same operation as that of the first aspect of the invention is achieved.

[0021]

As described above, in the invention of claim 1, when the packing is inserted into the hole and the connecting body is inserted into the packing, the first rib and the second rib are interposed. Then, the packing is in a state of being pressed over the entire circumference by the peripheral surface of the hole and the outer peripheral surface of the connection body. Therefore, the annular space between the hole and the connector is sealed.

In addition, at the time of the insertion, even if the insertion depth becomes large, the force required for pushing is not likely to increase,
This seal structure can be easily assembled. It should be noted that it is conceivable that an O-ring is held on the peripheral surface of the hole to secure the seal of the annular space by the O-ring, but in this case, when the O-ring is inserted into the hole, Its posture is large and easily inclined, and its assembly is not easy. On the other hand, according to the first aspect of the invention, since the packing inserted into the hole is tubular, the posture thereof is unlikely to be inclined during the insertion, and the assembly is easy.

In the invention of claim 3, the pressing force applied from the peripheral surface of the hole portion to the first rib and the pressing force applied from the outer peripheral surface of the connecting body to the second rib are as described above. Since they act on the same plane, both pressing forces cause
The packing is efficiently pressed. In the invention of claim 4, since a plurality of pressing portions by the first rib and the second rib in the packing are set in the axial direction of the hole, the sealing of the annular space becomes more reliable.

According to the fifth aspect of the present invention, even when the entire attachment body having the connection body is formed by injection molding of synthetic resin, the outer peripheral surface of the connection body is reduced in cross section toward the tip side of the connection body. Since it is formed on the tapered surface, it is possible to easily pull out the connection body from the mold part for molding the connection body. In the invention of claim 6, claim 5
The connection body according to the invention described above reliably presses the packing.

In the final stage of inserting the connecting body into the packing, the pressed state is achieved, so that the force required for the inserting is reduced and the inserting is facilitated. Further, even if the outer peripheral dimensions of the connection body are slightly different, the space between the connection body and the packing can be sealed. In the invention of claim 7, since the contact area between the outer peripheral portion of the first rib or the inner peripheral portion of the second rib and the surface in contact with these is small, insertion of the packing into the hole portion, Or, the force required for inserting the connection body into the packing is reduced,
The insertion becomes easy.

[0026] In the invention of claim 8, the first rib or the second rib formed in the piece-shaped cross section is bent forward at the time of the insertion, so that the force required for the insertion is reduced. The insertion becomes easy. Further, in the inserted state, the contact area of the piece-shaped cross section becomes large,
The friction locking force by the first rib or the second rib having the piece-shaped cross section is increased, and the retaining strength is improved.

According to the invention of claim 9, when the main body is inserted into the hole and the connecting body is inserted into the main body, the main body is inserted through the outer peripheral rib and the inner peripheral rib. It is in a state of being pressed over the entire circumference by the peripheral surface of the hole and the outer peripheral surface of the connection body. Therefore, the annular space between the hole and the connector is sealed.

Further, at the time of the above-mentioned insertion, even if the insertion depth becomes large, the force required for pushing is hard to increase,
This seal structure can be easily assembled. In the invention of claim 10, the main body portion, the outer peripheral ribs, and the inner peripheral ribs are integrally formed of rubber, so that the manufacturing thereof is easy. Further, the pressing force applied from the peripheral surface of the hole to the outer peripheral rib and the pressing force applied from the outer peripheral surface of the connector to the inner peripheral rib act on the same plane. Therefore, the main body is efficiently pressed by the both pressing forces.

According to the invention of claim 11, the same effect as that of the invention of claim 1 is achieved.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. [Embodiment 1] FIG. 1 is a perspective view of a remote controller with a TV for a water heater according to Embodiment 1 of the present invention.
FIG. 2 is a sectional view taken along line II-II of the TV-equipped remote controller shown in FIG. 3 is a front view of the first packing (3) mounted on the television device (1) of FIG. 1, and FIG. 4 is a cross-sectional view of the first packing (3) of FIG. 3 taken along the line IV-IV. is there. 5 is an explanatory view of a main part of the first packing (3) of FIG. 3 in a mounted state, and FIG. 6 is an enlarged view of a main part of the first packing (3) of FIG.

[Structure of each part] * About TV device (1) * The casing (100) of the TV device (1) is made of synthetic resin, and as shown in FIGS. 1 and 2, a liquid crystal display type image output is provided. A rectangular box-shaped case body (1a) with a built-in part (11), and a rectangular box-shaped mounting base continuous downward with respect to the case body (1a)
(1b) consists of

The case body (1a) is equipped with the image output section (11) so as to be exposed on the front surface thereof. The case body (1a) also has an operation unit (13) and a voice output unit (12) built in so as to be exposed on the front surface thereof. Furthermore,
The case body (1a) is provided with a circuit (14) for displaying an image on the image output unit (11). The mounting base (1b) is
The back surface is continuous with the back surface of the case body (1a) on the same plane, and the front-rear width is smaller than the front-rear width of the case body (1a). At the center of the front wall (101) of the mounting base (1b), a tubular portion (18) protruding rearward is provided. The first through hole (7a) is formed by the hole formed by the tubular portion (18) and the hole formed in the front wall (101) so as to be continuous with the hole with the same diameter. There is. This first through hole (7a)
Serves as an insertion portion for a cylindrical body (23) described later.

Further, the front surface of the front wall (101) has a first through hole (7a).
An annular rib (17) having a substantially triangular cross-section located concentrically with is protrudingly provided. The rear wall (102) of the casing (100) has a circuit
A first bush (5a) in which a cable for electrically connecting (14) and a water heater (not shown) is inserted is mounted in a state where the rear wall (102) is sealed in a watertight state.

In the mount (1b), below the recess (15) and above the cylinder (18), the space inside the mount (1b) is partitioned vertically into a watertight state. A wall (16) is provided. The partition wall (16) includes a circuit (14) and a control circuit described later.
A second bush (5b), through which a cable for electrically connecting with (22) is inserted, is attached in a state where the partition wall (16) is sealed in a watertight state.

* Regarding the remote control device (2) * The casing (200) of the remote control device (2) is in the shape of a flat rectangular box with a small front-rear width. And this casing (20
In (0), a liquid crystal display type display section (21) showing the operation state and a hot water supply operation section (24) for operating the water heater are built in so as to be exposed on the front surface. .

The casing (200) has a cylindrical body (2
3) is protruding. The inside of this cylinder (23) is the casing
It communicates with the inside of (200). Further, inside the casing (200), the operation state by (24) is displayed on the display unit (21) and an operation signal for remotely operating the water heater is sent to the circuit (14). A control circuit (22) is provided. A cable for electrical connection connected to the control circuit (22) is inserted into the tubular body (23) and extends to the outside of the remote controller (2).

The casing (200) is formed by injection molding a synthetic resin, and the outer peripheral surface of the cylindrical body (23) has a tapered surface whose diameter decreases toward the tip side in order to facilitate the die cutting. It is (231). Also, this remote control device
The casing (200) of (2) can be divided into two parts in the front-rear direction, and has a front first case (25) and a rear second case (26).
And are fitted in a watertight condition. Further, although not shown, the casing (100) of the television device (1) is also composed of a pair of cases that can be divided into two parts in the front and rear, and these cases are fitted in a watertight state.

* Regarding the first packing (3) * The first through hole (7a) of the mounting base (1b) is fitted with the rubber first packing (3). This first packing (3)
Is a cylindrical body (30) tightly fitted in the first through hole (7a).
An engaging ring portion (32) protruding from one end of the main body portion (30) over the entire circumference and engaging with the tubular portion (18), and the main body portion (3
The flange portion (33) protruding from the other end of (0) over the entire circumference and contacting the outer surface of the front wall (101).

The body portion (30) is set to have a constant wall thickness, and the outer diameter thereof is set to be slightly smaller than that of the first through hole (7a).
The inner diameter is set to be slightly larger than the outer peripheral surface of the cylindrical body (23). And, on the outer peripheral surface of the main body (30),
An annular first outer peripheral rib (301) and second annular outer peripheral rib (302) are juxtaposed over the entire circumference. Also, the main body (3
The inner peripheral surface of (0) has an annular first portion that projects over the entire circumference.
The inner peripheral rib (311) and the second inner peripheral rib (312) are juxtaposed.

The first outer peripheral rib (301) and the first inner peripheral rib (31
1) is on the side of the flange portion (33) and is located on the same plane perpendicular to the axis of the main body portion (30). Further, the second outer peripheral rib (302) and the second inner peripheral rib (312) are on the side of the engaging ring portion (32) and are perpendicular to the axis and are displaced from the same plane by a predetermined distance in the axial direction. It is located on the same plane.
Further, each of these ribs has a substantially arcuate outer peripheral edge in cross section.

The first outer peripheral rib (301) and the second outer peripheral rib (30
The outer diameter of 2) is set to be slightly larger than the first through hole (7a). The first inner peripheral rib (311) and the second inner peripheral rib (3
The inner diameter of 12) is set to be slightly smaller than the diameter of the contact portion with the ribs on the tapered surface (231). Then, as shown in FIG. 6, the height (X ₁ ) of the first inner peripheral rib (311) is set lower than the height (X ₂ ) of the second inner peripheral rib (312). The heights (X ₁ ) and (X ₂ ) of the are set such that the inner peripheral portion thereof substantially coincides with the tapered surface (231).

With the above structure, the first outer peripheral rib (301)
And the height of the first inner peripheral rib (311) and the height of the second outer peripheral rib (302) and the second inner peripheral rib (312) are the same. ) And the tubular body (23), the thickness is slightly larger than the value obtained by subtracting the wall thickness value of the main body (30). Further, the first outer peripheral rib (301) and the second outer peripheral rib (30
2), first inner peripheral rib (311), and second inner peripheral rib (312)
The widths (L ₁ ) in the axial direction in the above are set to substantially the same size. The width (L ₁ ) is the width (L ₂ ) from the outer surface of the front wall (101) to the tip end surface of the tubular portion (18) in the axial direction.
Smaller than that of the main body in the axial direction (3
It is set smaller than the width (L ₃ ) of 0).

The end surface of the engaging ring portion (32) opposite to the cylindrical portion (18) is a tapered surface (321) whose diameter decreases toward the opposite side. The minimum diameter of the surface (321) is set to be slightly smaller than the diameter of the first through hole (7a). * Regarding the second packing (4) * Between the front wall (101) and the remote control device (2), the first packing
An annular second rubber packing (4) enclosing the through hole (7a) over the entire circumference is interposed. This second packing
The size of (4) is set so that the approximately middle portion in the width direction thereof coincides with the annular rib (17).

[Mounting of remote controller (2)] Remote controller
To attach (2) to the television device (1), first, the first packing (3) is inserted into the first through hole (7a). At this time, the first
Since the minimum diameter of the tapered surface (321) of the engaging ring portion (32) of the packing (3) is set to be slightly smaller than the diameter of the first through hole (7a), the first through hole (7a) The engaging ring portion (32) can be pushed in smoothly with respect to.

By this pushing, the engaging ring portion (3
2) passes through the first through hole (7a) in a reduced diameter state, and the engagement ring portion (32) protrudes toward the distal end side of the tubular portion (18). It is restored by the elastic return force and is brought into a state of being engaged with the tubular portion (18). In this state, the flange portion (33) of the first packing (3) is in contact with the front wall (101). Therefore, the tubular portion (18) and the front wall (101) are sandwiched by the engaging ring portion (32) and the flange portion (33), and the first packing (3) is attached to the mounting base (1b). It has been done.

In this mounted state, the outer diameters of the first outer peripheral rib (301) and the second outer peripheral rib (302) are set to be slightly larger than the first through hole (7a). Outer Rib (301)
And the second outer peripheral rib (302) is pressed against the peripheral surface of the first through hole (7a) over the entire circumference, and the first outer peripheral rib (301) and the second outer peripheral rib (302)
The main body portion (30) is pressed from the peripheral surface over the entire circumference through the outer peripheral ribs (302). Therefore, the main body (30)
A watertight seal is provided between the first through hole 7a and the first through hole 7a.

Then, the second packing (4) is attached to the mounting base (1b).
The front wall (101) of the remote control device (2) and surround the first through hole (7a).
Insert into packing (3). At this time, the first packing
The inner diameters of the first inner peripheral rib (311) and the second inner peripheral rib (312) of (3) are set to be slightly smaller than the diameter of the tapered surface of the cylindrical body (23). The first inner peripheral rib (311) and the second inner peripheral rib (312) are pressed against the outer peripheral surface of the tubular body (23) over the entire circumference, and the first inner peripheral rib (311) and the second inner peripheral rib (311) rib
The main body part (30) is pressed over the entire circumference through (312). Therefore, the space between the body portion (30) and the cylindrical body (23) is sealed in a watertight state.

Therefore, the annular space between the first through hole (7a) and the cylindrical body (23) is sealed in a watertight state, and the inside of the casing (100) is maintained in a watertight state. Further, the remote control device (2) is fixed to the front wall (101) by a pair of bolts (not shown) inserted through the left and right ends of the remote control device. In this fixed state, the entire second packing (4) is compressed by the remote control device (2) and the front wall (101) and the annular rib (17) digs into the second packing (4) over the entire circumference. It becomes a state. The second packing (4) also keeps the inside of the casing (100) watertight.

In this embodiment, the cylindrical body (23) is first
Before being inserted into the through hole (7a), a cable for electrically connecting the control circuit (22) and the circuit (14) is joined by a relay connector (88) provided in the middle thereof. In this case, the first outer peripheral rib (301), the second outer peripheral rib (302), and the first inner peripheral rib (311)
, And the axial width (L ₁ ) of the second inner peripheral rib (312) is the width from the outer surface of the front wall (101) to the distal end surface of the tubular portion (18) in the axial direction. Since it is set to be smaller than (L ₂ ) and the width (L ₃ ) of the main body portion (30) in the axial direction, to the first through hole (7a) of the first packing (3). Even when the insertion depth is increased when inserting the cylindrical body (23) into the first packing (3) and inserting the cylindrical body (23) into the first packing (3), it is difficult to increase the force required for pushing. Therefore, the assembly of this seal structure is easy.

Further, the first outer peripheral rib (301) and the first inner peripheral rib (301)
(311) is located on the same plane perpendicular to the axis of the body (30), and the second outer peripheral rib (302) and the second inner peripheral rib (312) are perpendicular to the axis and the same. Since they are located on the same plane with a predetermined distance from the plane, the first through hole (7
From the peripheral surface of a), the first outer peripheral rib (301) and the second outer peripheral rib (30
From the pressing force applied to 2) and the outer peripheral surface of the cylindrical body (23),
The packing is efficiently pressed by the pressing force applied to the inner peripheral ribs (311) and the second inner peripheral ribs (312).

Further, since a plurality of pressing portions by the ribs in the main body portion (30) are set in the axial direction, an annular space between the first through hole (7a) and the cylindrical body (23). The seal of is more reliable. Further, since the entire first packing (3) is made of rubber, it is easy to manufacture and the degree of close contact between the rib and its contact surface is improved. Since the outer peripheral edge of the rib is substantially arcuate, the contact area between the rib and the contact surface is reduced, and the force required for pushing is reduced.

The outer peripheral surface of the cylindrical body (23) is a tapered surface (231), and the height (X ₁ ) (X ₂ ) of the first inner peripheral rib (311) and the second inner peripheral rib (312) Since the above-mentioned relation is set, when the cylindrical body (23) is inserted into the first packing (3), at the final stage of the insertion, the taper surface (231) surrounds the rib over the entire circumference. It will be in a state of being pressed over. Therefore, the force required for the insertion is reduced and the insertion is facilitated.
Even if the outer diameter of the cylinder (23) is slightly different, the first packing
A seal can be made between (3) and the cylindrical body (23).

In the first embodiment, the first through hole (7
a) is the "hole" described in the above-mentioned claims,
The cylindrical body (23) is the "connecting body" described in the claims. Further, the first packing (3) is the "packing" described in the claims, and the first outer peripheral rib (301) and the second outer peripheral rib (302) are described in the claims. “First rib” and “outer peripheral rib”, and the first inner peripheral rib (311) and the second inner peripheral rib (312) are the “second rib” and “inner rib” described in the claims. Circumferential ribs ". [Other embodiments]. 7 and 8 are explanatory views of a main part of a remote controller with a television according to another embodiment.

In the above embodiment, the above-mentioned "first rib" and "second rib" are provided on the first packing (3).
As shown in FIGS. 7 and 8, this is the third rib (303) provided with the “first rib” on the peripheral surface of the first through hole (7a), and the “second rib” is formed.
The “rib” may be the fourth rib (304) provided on the outer peripheral surface of the cylindrical body (23). . FIG. 9 is an explanatory view of a main part of a remote controller with a television according to another embodiment.

As shown in the figure, the first inner peripheral rib (311) and the second inner peripheral rib (312) are formed in a piece-shaped cross section. In this case, when the tubular body (23) is inserted into the first packing (3), the first inner peripheral rib (311) and the second inner peripheral rib (312)
Is bent forward in the insertion direction. Therefore, the force required for the insertion is reduced and the insertion is facilitated. In addition, since the contact area of the piece-shaped cross section becomes large in the inserted state, the first inner peripheral rib (311) and the second inner peripheral rib (312)
The frictional locking force due to is increased.

[Brief description of drawings]

FIG. 1 is a perspective view of a remote controller with a TV for a water heater according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of the TV-equipped remote controller shown in FIG.

3 is a front view of a first packing (3) mounted on the television device (1) of FIG.

4 is a cross-sectional view of the first packing (3) of FIG. 3, taken along line IV-IV.

5 is an explanatory view of a main part of the first packing (3) of FIG. 3 in a mounted state.

FIG. 6 is an enlarged view of a main part of the first packing (3) in FIG.

FIG. 7 is an explanatory view of a main part of a remote controller with a television according to another embodiment.

FIG. 8

FIG. 9

FIG. 10 is an explanatory view of a main part of a remote controller with a television for a water heater according to a conventional technique.

FIG. 11 is an explanatory view of a main part of another remote controller with a television.

[Explanation of symbols]

 (7a) ・ ・ ・ First through hole (23) ・ ・ ・ Cylinder body (3) ・ ・ ・ First packing (301) ・ ・ ・ First outer peripheral rib (302) ・ ・ ・ Second outer peripheral rib (311) ... First inner peripheral rib (312) ... Second inner peripheral rib

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H05K 5/06 7301-4E H05K 5/06 D

Claims (11)

[Claims] 1. A structure for sealing an annular space formed between a hole provided in an object and a substantially columnar connection body inserted through the hole in a watertight state or an airtight state, wherein the annular space And a cylindrical packing inserted through the outer peripheral surface of the hole or the outer peripheral surface of the packing, and the width is the width in the axial direction of the hole, and the width is An annular first rib that is smaller than the thickness of the object, and an inner peripheral surface of the packing or an outer peripheral surface of the connecting body, and the protruding portions over the entire circumference, the width of which is the width of the hole in the axial direction. An annular second rib, the width of which is smaller than the width of the packing, and the packing is provided with a peripheral surface of the hole and an outer peripheral surface of the connector through the first rib and the second rib. Seal structure that is pressed all around by. 2. A value obtained by subtracting a wall thickness value of the packing from a dimensional value of a gap between the hole and the connection body,
The seal structure according to claim 1, wherein a value of a sum of heights of the first rib and the second rib is large. 3. The seal structure according to claim 1, wherein the first rib and the second rib are located on the same plane substantially perpendicular to the axis of the hole. 4. The plurality of first ribs and the second ribs are arranged in the axial direction of the hole.
The seal structure according to any one of 1. 5. The connecting body projects from an attaching body which is detachably attached to the object, and an outer peripheral surface of the connecting body is formed into a tapered surface whose cross-section is reduced toward a tip side of the connecting body. The seal structure according to claim 4, wherein 6. The seal structure according to claim 5, wherein the plurality of second ribs are formed such that an inner peripheral portion thereof substantially coincides with the tapered surface. 7. The seal structure according to claim 1, wherein the first rib or the second rib has a cross-section outer peripheral edge formed in a substantially arc shape. 8. The seal structure according to claim 1, wherein the first rib or the second rib is formed in a piece-shaped cross section that is elastically deformable in the axial direction of the hole. 9. A packing for sealing an annular space formed between a hole provided in an object and a substantially columnar connecting body inserted into the hole in a watertight state or an airtight state, said packing comprising: A tubular main body having a size that can be inserted into the annular space, and the entire outer circumference of the main body projecting over the entire circumference, the width of which is the width in the axial direction of the hole, and the width is the above. An annular outer peripheral rib that is smaller than the thickness of the object, and protrudes from the inner peripheral surface of the main body over the entire circumference, and the width thereof is the width in the axial direction of the hole, and the width is the width of the main body. An annular inner peripheral rib having a width smaller than the width, wherein the sum of the heights of the outer peripheral rib and the inner peripheral rib is determined from the dimension value of the gap between the hole and the connection body. Packing larger than the value obtained by subtracting the wall thickness value of. 10. The body, the outer peripheral ribs, and the inner peripheral ribs are integrally formed of rubber, and the outer peripheral ribs and the inner peripheral ribs are substantially the same at right angles to the axis of the hole. The packing according to claim 9, which is located on a plane. 11. A casing configured to be watertight,
An attachment body detachably attached to the casing so as to cover the hole provided in the constituent wall of the casing,
A device having a cylindrical body protruding from the mounting body and inserted into the hole, and using a structure for sealing an annular space formed between the hole and the cylindrical body in a watertight state or an airtight state. In the tubular packing inserted into the annular space, the circumferential surface of the hole or the outer peripheral surface of the packing is projected over the entire circumference, and the width thereof is the width in the axial direction of the hole. And the width is an annular first smaller than the thickness of the constituent wall
The rib and the inner peripheral surface of the packing or the outer peripheral surface of the tubular body project over the entire circumference, and the width thereof is the width in the axial direction of the hole, and the width is smaller than the width of the packing. An annular second rib, and the packing is pressed over the entire circumference by the peripheral surface of the hole and the outer peripheral surface of the tubular body via the first rib and the second rib. Equipment that uses a seal structure.